Method for making valve travel (versions), device for friction valve travel (versions) and unit incorporating such valve

FIELD: mechanics.

SUBSTANCE: method for making valve travel from the fist stationary position into the second stationary position uses a valve and a seat. Valve sealing is effected by moving it towards the seat. The valve is in the first stationary position. The valve sealing force is reduced to the level allowing breaking the said sealing. The valve moves to the second stationary position. The valve in said second stationary position, the sealing force is again applied to the valve. There are also an appliance to reduce valve travel friction and a unit incorporating such valve.

EFFECT: invention ups the valve sealing reliability and downs its wear.

23 cl, 28 dwg

 

Prerequisites to the creation of inventions

Regenerative thermal oxidation is usually used for decomposition of volatile organic compounds (VOC) into a powerful, low concentration emissions of industrial enterprises and power plants. Such oxidation usually require high temperature oxidation to achieve deep decomposition of VOC. In order to achieve high efficiency heat recovery dirty process gas, intended for processing, pre-heated prior to oxidation. Usually to pre-heat these gases apply heat exchange column. Usually the column has a nozzle from the heat transfer material with good thermal and mechanical stability and sufficient thermal mass. In the process, the process gas is passed through the pre-heated heat-exchange column, which in turn heats the process gas to a temperature approaching or reaching temperature oxidation of its VOC. This preheated process gas then send in the burning zone, where any incomplete oxidation of VOC completes normally. Processed now "clean" gas is now sent from the zone of combustion and again passed through the heat exchange column or through the second heat exchanger to the Onna. As the hot oxidized gas is passed through the column, the gas transfers its heat to the heat exchange medium in the column with cooling gas and preheating heat exchange medium, which can be subjected to preliminary heating another portion of the process gas before the oxidation treatment. Regenerative thermal oxidation often contain at least two heat-exchange columns, which in turn take technological and recycled gases. This process is carried out continuously, allowing it to effectively process large volumes of process gas.

The operation of the regenerative oxidation can be optimized by improving the efficiency of decomposition of VOC and by reducing operating and capital costs. The art of improving the efficiency of decomposition of VOC is considered in the literature and provides, for example, using tools such as improved oxidation and purification systems (for example, camera trapping) and three or more heat exchangers for the treatment of raw gas volume in oxidative installation during switching. Operating costs can be reduced by increasing the efficiency of heat recovery and by reducing the differential pressure at the oxidant is th installation. Operational and capital costs can be reduced through proper design of oxidation and by choosing a suitable material for heat exchanger nozzles.

An important element of effective oxidation is a valve system that is used to switch the flow of process gas from one heat exchange column to another. Any leakage of the raw process gas through the valve system will reduce the efficiency of the device. In addition, when the switching valve can be caused by disturbances and fluctuations in pressure and/or flow in the system, which is undesirable. Problems also creates wear on the valve, particularly given the high switching frequency of the valve when using the regenerative oxidation. Obvious spam is a frequent repair or replacement of the valve.

In conventional design with two columns use two Poppet valves, one of which is associated with the first heat exchange column, and the other from the second heat exchange column. Although Poppet valves demonstrate fast response time when switching of the valves during the cycle inevitably leak raw process gas through the valves. For example, in the double-oxidative installation during the cycle there is a time in which inlet the th valve (s) and exhaust valve (s) are partially open. At this point there is no resistance to the flow of process gas, and the flow goes directly from input to output without being processed. Since the valve system is connected to the pipe system, the volume of raw gas, which as in the case of Poppet valve and the respective pipes is a potential leak. Since the diversion of untreated process gas through the valve allows the release of gas from a raw device, such leakage will lead to a significant reduction in the efficiency of the device on the decomposition. In addition, conventional valve designs lead to press jump when switching, which increases the possibility of leakage.

In the past ten years in regenerative thermal and catalytic oxidation units in order to direct the flow, use valves of the rotary type. These valves work or continuously, or digital (stop/start). In order to provide a good seal, apply mechanisms to maintain a constant force between the stationary components of the valve and rotating components of the valve. These mechanisms include springs, air membrane and cylinders. Often, however, is excessive wear of the various components of the valve.

It would therefore be desirable offers in order to live the valve and valve system, in particular for use in a regenerative thermal oxidation plant, and regenerative thermal oxidation installation having such valve and system that provide a proper seal and reduce or eliminate wear.

It would also be desirable to provide a valve and valve system, which can accurately control the pressure seal.

The invention

Problems preceding technical solutions are overcome by the present invention which provides a lifting system for a switching valve switching valve and regenerative thermal oxidation installation, including lifting system and a switching valve. The valve according to the present invention shows excellent sealing characteristics and minimizes wear. The lifting system helps the valve to rotate with minimal friction and provides a tight seal in a stationary position. In a preferred implementation sealing force with which the valve acts on the valve seat decreases during switch in order to reduce the pressure of contact between the driving components and stationary components, resulting in reduced torque required for valve movement.

When used with regeneration the th thermal oxidation installing the valve preferably has a sealing plate, which restricts two cameras, each of which is a channel leading to one of the two regenerative layers of oxidation. The valve also includes a change-over valve flow, which provides alternating kanalizirovanija incoming and outgoing process gas to each side of the sealing plate. The valve operates in two modes: in a stationary mode and the driving mode of the valve. In stationary mode, the dense gas-tight seal is used in order to minimize or prevent leakage of gas. In accordance with the present invention during movement of the valve seal pressure is reduced or removed or attached to the pressure or force of counteraction to facilitate movement of the valve and to reduce or eliminate wear. The magnitude of the efforts of the seal can be precisely controlled depending on the characteristics of the process so as to effectively seal the valve.

More specifically, in accordance with the claimed invention, a method for moving a valve from a first stationary position to the second stationary position, which contains:

providing a valve and valve seat, the valve is adapted to seal relative to the valve seat;

the seal of the valve relative to sentakuya by application of force to bias the valve towards the valve seat, when the valve is in the first fixed position;

lowering actions of this effort to the extent sufficient to breach the specified seals;

the valve to move to the second stationary position;

the resumption of efforts to seal the valve relative to the valve seat when the valve is in the second fixed position.

Preferably the effect of this effort is reduced through application to the valve efforts of resistance.

Preferably the indicated force and the indicated force of the counter is applied by means of compressed air.

Preferably, the valve seat has an annular groove, and the force of the counter is applied by compressed air in the specified slot.

Preferably the specified force is applied using an electromagnet that pulls the valve to the valve seat, the force reduced by de-energizing the electromagnet.

Also, the proposed device to reduce friction during movement of the valve containing a valve flow; a valve seat; an actuator associated with the valve flow and designed to move the dispenser flow from the first stationary position to the second stationary position; a source of compressed gas which communicates with the dispenser flow; first the second controller, designed to supply compressed gas to the valve flow under the first pressure sufficient to seal the dispenser of the flow relative to the valve seat when the valve flow is or in the first or second stationary position; and a second regulator designed to supply compressed gas to the valve flow under a second pressure lower than the first pressure when the flow distributor is moved between the first and second stationary positions.

Preferably the device also includes a solenoid associated with the first and second regulators to determine in the sequence, which gives regulators the specified compressed gas in the thread allocator.

Preferably the device also includes an emergency release valve to selectively prevent the flow of the specified compressed air stream in the flow distributor.

Preferably the actuator includes a hollow drive shaft, while compressed air is supplied to the dispenser flow through the hollow drive shaft.

Preferably the flow distributor includes an upper surface having multiple holes, and the seal is formed by compressed air flowing from these holes and creates an air cushion between the upper surface and the valve seat.

In another predpochtite the flax embodiment of the invention, a method for moving a valve from a first stationary position to the second stationary position, contains the provision of a valve and valve seat, the valve is adapted to seal relative to the valve seat; providing a supply of compressed gas; a shift valve toward the valve seat to seal the valve when the valve is in the first stationary position, by submitting to the valve of the compressed gas under a first pressure sufficient to create the specified seals; disturbance of seals by feeding compressed gas into the valve under the second pressure, lower than the first pressure; a valve to move to the second stationary position; and bias the valve towards the valve seat to seal the valve when the valve is in the second fixed position, by submitting to the valve of the compressed gas at a third pressure that is sufficient to create a seal.

Preferably the first and third pressure are approximately equal.

In yet another preferred embodiment of the invention, an apparatus for reducing friction during movement of the valve containing a valve flow; a valve seat; an actuator associated with the valve flow and designed to move the dispenser flow from the first stationary position to the second stationary position; a source of compressed gas which communicates with the dispenser flow; a pressure regulator which I designed to supply compressed gas to the valve flow under the first pressure sufficient to seal the dispenser of the flow relative to the valve seat when the valve flow is or in the first or second stationary position, and to supply compressed gas to the valve flow under a second pressure lower than the first pressure when the flow distributor is moved between the first and second stationary positions.

Also proposed regenerative thermal oxidation plant for processing gas containing a combustion zone; a hood; a first heat transfer layer containing a heat-exchange medium and is connected with the zone of combustion and exhaust; a second heat transfer layer containing a heat-exchange medium and is connected with the zone of combustion and exhaust hood; at least one valve for switching between the first stationary mode, passing the gas stream in the first heat exchanger layer, the move mode and the second stationary regime, passing the gas stream in the second heat exchanger layer, and the valve includes a valve actuator and a valve seat; means for sealing the valve relative to the seat valve when the valve is in the first or second stationary modes; and means for loosening the valve when the valve is in the mode displacement is possible.

Preferably the valve is a Poppet valve

Preferably the apparatus comprises at least one valve in a pressurized pipeline, designed to control the flow of the sealing gas to the sealing surface section based on the position of the Poppet valve.

In another preferred embodiment, the valve is a butterfly valve.

Brief description of drawings

Figure 1 represents a perspective view of the regenerative thermal oxidizing installation according to one implementation variant of the present invention;

Figure 2 is a perspective view of the split parts part regenerative thermal oxidation according to one implementation variant of the present invention;

Figure 3 is a perspective bottom view of the ports of the valve, forming part of a valve suitable for use in the present invention;

4 is a perspective view of the forming thread allocator side switching valve designed for use in the present invention;

Figa - view in section of the dispenser flow in figure 4;

5 is a perspective view of the part of the distributor flow in figure 4;

6 is a top view of the sealing plate valve, suitable for use in the present invention;

Figa - view in terms of plot sealing plates is from Fig.6;

Fig.7 is a perspective view of the shaft of the distributor flow in figure 4;

Fig - view separation on the details of the drive mechanism suitable for use in the present invention;

Fig.9 is a view in broken section of the drive mechanism with Fig;

Figure 10 is a view in section of the drive shaft of the valve according to the present invention, shown in connection with a drive mechanism with Fig;

11 diagram of the lifting system according to one implementation variant of the present invention;

Figa diagram of the lifting system according to another implementation variant of the present invention;

Fig - view in the context of the lifting system according to alternative implementations of the present invention;

Fig - view in the context of the lifting system according to another alternative implementation of the present invention;

Fig - view in section of the rotating port allocator thread, suitable for use in the present invention;

Fig - view in section of the lower part of the drive shaft of the distributor stream suitable for use in the present invention;

Fig - view in section of the rotating valve port, suitable for use in the present invention;

Figa is a perspective view of the retaining ring for seal valve, suitable for use in the present invention;

Figw - a view in section of the locking ring on figa;

Figs is a perspective view of the mounting rings to seal the valve, suitable for use in the present invention;

Fig.16D - view in section of the mounting ring with figs;

File is a perspective view of the bearing of the arc of the valve plate, suitable for use in the present invention;

Fig.16F - view in section of the bearing of the arc plates on File;

Fig.16G is a perspective view of one embodiments of a sealing ring of the valve, suitable for use in the present invention;

Fign - view in section of the sealing ring on figs; and

Fig - view in section of the recess in the seal ring fig.16G.

Detailed description of the invention

Though most of the following description illustrates the use of the lifting system according to the present invention in connection with a change-over valve according to U.S. patent No. 6261092 (the description of which is included here as a reference), it is noted that the invention is not intended to limit any particular valve and it can be applied to any valve system, in which the seal.

It is assumed awareness with the valve described in patent '092. Briefly, figure 1 and 2 shows a two-chamber regenerative thermal oxidation system 10 (catalytic who do not catalytic), based on the shown frame 12. Oxidative installation 10 includes a housing 15 which contains the first and second heat exchange chamber, communicating with which is located in the center of the zone of combustion. Burner (not shown) may be connected with the zone of combustion, and the frame 12 can be mounted blower to supply to the burner combustion air. The zone of combustion includes a bypass outlet 14 which is connected with an exhaust pipe 16, usually leading to the atmosphere. The control Cabinet 11 accommodates tools, device management, and also preferably located on the frame 12. Against control Cabinet 11 is a fan (not shown)mounted on the frame 12 and intended for the supply of process gas in an oxidizing installation 10. The housing 15 includes an upper chamber or roof 17 having one or more access doors 18, providing the operator access into the housing 15. Specialists in the art should be understood that the above description is only for purposes of illustration; the scope of the present invention correspond to other designs, including oxidation with more or less than two, the number of cameras, oxidation with a horizontally oriented camera (cameras) and catalytic oxidation. The camera 20 with the cold surface forms the base corpus, as best shown in figure 2. On the cold surface of the camera 20 is placed a suitable supporting bars 19, which supports the heat exchange basis in each of the heat exchange column, as discussed in greater detail below. In the shown embodiment, the implementation of heat exchange chambers are separated by dividing walls 21, which are preferably covered with insulation. In addition, in the shown embodiment, the implementation of the flow passing through the heat exchange layers, is directed vertically; the process gas enters into the layers of the ports of a valve located in the chamber 20 with the cold surface, going up towards the roof 17) in the first layer, enters the zone of combustion chamber connected to the first layer extends from the zone of combustion and goes into the second layer, where it flows downward through the second layer in the direction of the camera 20 with the cold surface. However, specialists in the art should be understood that other possible orientations, including the layout horizontally, such that the heat exchange columns facing each other and separated situated in the centre of the zone of combustion.

Figure 3 shows the port 25 of the valve at the bottom. The plate 28 has two opposite symmetrical openings 29A and 29B, which, together with the partitions 26 (2) limit the ports 25 of the valve. Each port 25 of the valve has an additional swivel the blade 27. Each rotary blade 27 has a first end attached to the plate 28, and a second end separated from the first end and attached to the wall 24 on each side. Each rotary blade 25 extends from its first end to its second end, and leaves at an angle up, then move in the horizontal position 27A, as shown in figure 3. Turning vanes 27 are used to direct the flow of process gas coming from the ports of the valve away from the valve ports with the aim to contribute to its distribution on the camera with a cold surface in the process. Uniform distribution on the camera 20 with the cold surface provides uniform distribution of heat transfer environment to achieve optimum efficiency of heat exchange.

4 and 4A shows the flow distributor 50, located in the pipe 51 having an inlet 48 for process gas and an outlet 49 for the process gas (although the element 48 may be output and 49 input, for clarity in this case will be used in the previous embodiment). The flow distributor 50 includes a preferably hollow cylindrical drive shaft 52 (figa, 5), which is connected with a drive mechanism (shown in detail in Fig-10). To the drive shaft 52 is connected to the element 53 having the shape not olego of a truncated cone. The element 53 includes a mating plate formed by two opposing sealing surfaces 55, 56 in the form of sectors, each of which connects a circular outer edge 54 and moves outward from the drive shaft 52 at an angle of 45°so that the opening is limited to two sealing surfaces 55, 56 and the outer edge 54, forms a first path or channel 60 for gas. Similarly, the second path or channel 61 for gas is formed by the sealing surfaces 55, 56, positioned against the first channel, and three angular side plates 57A, 57B, and the Central angle of the side plate S. Angular side plates 57 separate channel 60 channel 61. The top of these channels 60, 61 are designed to coincide with the symmetrical configuration of the openings 29A, 29B in the plate 28, and after Assembly, each channel 60, 61 is combined with the corresponding openings 29A, 29B. Channel 61 is communicated with the only entrance 48 and channel 60 communicates with the only exit 49 through the chamber 47, regardless of the orientation of the flow distributor 50 at any given moment. Thus, the process gas flowing in the pipe 51 through the inlet 48, passes through a single channel 61, and the process gas flowing in the channel 60 of the ports 25 of the valve passes only through the outlet 49 through the chamber 47.

The sealing layer is 100 (6) interlocks with the plate 28, limiting the ports 25 of the valve (figure 3). Preferably between the upper surface of the distributor 50 and thread sealing plate 100 using gas valve, most preferably air, as shown in more detail below. The flow distributor can be rotated around a vertical axis by means of drive shaft 52 relative to the fixed plate 28. Such rotation moves the sealing surfaces 55, 56 in position, covering the areas of the openings 29A, 29B, and the position of opening them.

Now first will be considered one way valve seal with reference to figure 4, 6 and 7. The flow distributor 50 glides on a cushion of air in order to minimize or eliminate wear at the movement of the distributor flow. Specialists in the art intuitive ability to use instead of air, another gas, although air is preferred and will be mentioned here for purposes of illustration. Air curtain not only seals the valve, but also permits the movement of the distributor flow completely or almost without friction. The pressure supply system, such as a fan or similar, which may be the same or different than the fan used to supply air for combustion to the burner combustion zone, delivers the air to the drive shaft 52 of the distributor 50 is Otok by a suitable duct (not shown) and the chamber 64. As best shown in figure 5 and 7, the air moves from the boxes in the drive shaft 52 through one or more openings 81, is made in the case of the drive shaft 52 above the base 82 of the drive shaft 52 connected to the drive mechanism 70. The exact position of the holes (vias) 81 is not particularly limited, but preferably the holes 18 are symmetrically arranged around the shaft 52 and uniformity are of equal size. Compressed air flows through the shaft facing upward as shown by arrows in figure 5, and part of it enters the radial channels 83, communicating and supply o-ring seal located in an annular rotating passage 90, as shown in more detail below. Part of the air that is not supplied to the radial channels 83, continues to move up the drive shaft 52 until it reaches the passages 94, which distribute the air in the channel having a semicircular section 95 and the area enclosed by shaped sectors wedges 55, 56. The mating surface of the distributor 50 flow, in particular the mating surfaces having the form of sectors of wedges 55, 56 and the outer annular edge 54, made with lots of holes 96, as shown in figure 4. Compressed air from the pipe 95 extends from the pipe 95 through these holes 96, as shown by arrows in figure 5, and creates an air cushion between the top surface of the distribution is of Italia 50 flow and stationary sealing plate 100, shown in Fig.6. The sealing plate 100 includes an annular outer edge 102 having a width corresponding to the width of the upper surface 54 of the distributor 50 thread, and a pair of shaped sectors wedges 105, 106, coinciding in form with shaped sectors wedges 55, 56 of the flow distributor 50. It corresponds to (and connected) with the plate 28 (Fig 3) port of the valve. Through the hole 104 is omitted, the pin shaft 59 (5), connected to the dispenser 50 thread. The lower side of the annular outer edge 102 facing the flow distributor includes one or more annular grooves 99 (figa), which align with the holes 96 of the mating surface of the distributor 50 thread. Preferably there are two concentric series of grooves 99 and two corresponding series of holes 96. Thus, the grooves 99 contribute to the exit of air from the holes 96 on the upper surface 54 for the formation of an air cushion between the mating surface 54 and an annular outer edge 102 of the sealing plate 100. In addition, the air coming out of the holes 96 in the shape of sectors of sections 55, 56, forms an air cushion between having the form of sectors of sections 55, 56 and having the form of sectors of sections 105, 106 of the sealing plate 100. These air cushion minimize or prevent leakage of untreated technologist is ical gas stream clean process gas. Relatively large shaped sectors wedges as distributor 50 flow and dispenser 100 flow form long way through the upper part of the distributor 50 thread that you want to pass untreated process gas to leak. Because the dispenser 50 flow immobile for most of the period of work, impenetrable air cushion is created between all the mating surfaces of the valve.

Preferably, compressed air is supplied from the fan that is different from the one that supplies process gas to the device, which uses the valve so that the pressure of the sealing air is higher than the process gas pressure at the inlet or the outlet, thus forming a positive seal.

The dispenser 50 flow includes rotating the port, which is best visible in figure 7 and 14. Having the form of a truncated cone portion 53 of the distributor 50 flow rotates relative to the annular cylindrical wall 110, which serves as the outer o-ring seal. The wall 110 includes an outer annular flange 111 used for the alignment of the walls 110 and fastening it with a pipe 51 (see also figure 4). E-shaped element 116 inner o-ring is preferably made of metal) is connected with the dispenser 50 flux is a and comprises a pair separated by a gap parallel grooves A, 115V made in it. As shown, the groove A inserted piston ring A, and in the groove 115V - piston ring 112 VDC. Each piston ring 112 is pressed to the wall 110 of the outer annular seal and remains stationary even when the rotation of the distributor 50 thread. Compressed air (or gas) passes through the radial channels, as shown by the arrows on Fig, through holes 84, communicating with each radial channel 83, and into the channel 119 between the piston rings A, 112 VDC, and the clearance between each piston ring 112 and the inner o-ring seal 116. When the flow distributor is rotated relative to the stationary cylindrical wall 110 (and piston rings A, 112 VDC), the air in the channel 119 seals the space between the two piston rings A, 112 VDC, creating a continuous and does not cause friction seal. The clearance between the piston rings 112 and inner piston seal 116, and the gap 85 between the inner piston seal 116 and the wall 110 perceive any movement axially or otherwise) in the drive shaft 52 associated with thermal expansion or other factors. Specialists in the art it should be clear that although there is shown a seal with two piston rings, it is also possible to use two or more piston rings for additional seals. For sealing can use the I positive or negative pressure.

On Fig shows how the camera 64, the supply shaft 52 with compressed air, is sealed relative to the drive shaft 52. The seal is made in a manner similar to the rotating port, discussed above, except that the seal is not under pressure and want to use only one piston ring for each seal above and below the chamber 64. For example, when using a seal above the chamber 64 therein form a C-shaped inner ring 216 by vitacilina Central groove. A stationary annular cylindrical wall 210, which serves as the outer annular seal includes an outer annular flange 211 used for the alignment of the walls 210 and securing it to the camera 64. Fixed piston ring 212 is inserted in a groove made in the C-shaped inner annular seal 216 is attached to the wall 210. Clearance between piston ring 212 and a channel-shaped inner seal 216, as well as the gap between the C-shaped inner seal 216 and the outer cylindrical wall 210 perceive any movement of the drive shaft 52 associated with thermal expansion and the like. A similar cylindrical wall 310, C-shaped inner seal 316 and piston ring 312 are used on the opposite side of the chamber 64, as shown in Fig.

The alternative is passive embodiment of the seal shown in Fig-16I and shown in the concurrently pending patent application U.S. No. 09/849785, the description of which is included here as a reference. First, Fig locking ring seal 664, preferably made of carbon steel, is shown attached to the rotating node 53. The safety ring seal 664 preferably is a split ring, as shown in the perspective view figa, and has a slit shown in figv. Cut rings facilitates its installation and removal. The safety ring seal 664 can be attached to the rotating node 53 of the screw head 140, although it is possible to use for fastening the ring 664 other appropriate means. Preferably the rotating Assembly includes a groove for proper positioning of the locking ring seals.

Opposite the locking ring seal 664 is ring 091, which is best shown in figs and 16D. Ring 091 also connects with the rotating hub 53 by a screw with a head 140', and the groove for the correct positioning of the mounting ring 091 performed in a rotating node.

In the shown implementation, where the rotating unit rotates around a vertical axis, the weight of the ring seal 658 may lead to wear and tear during its sliding mounting ring 091. In order to reduce or eliminate such wear, ring 663 projectors, which are trained with the tab 401, made around the entire circumference and preferably placed at the center, as best shown in fig.16D. Additional carrier plate arc 663 has the groove 402 (file, 16F), matching the shape and position with the tab 401, and is superimposed on the ring 091 Assembly shown in Fig. Bearing plate arc 663 preferably is made of a material that is different from the o-ring seals 658 to facilitate its functioning as a support. Suitable materials include bronze, ceramics or other metal different from the metal used as the material for the annular seal 658.

Between the safety ring seal 664 and arc 663 is annular seal 658. As shown in figs and N, the annular seal has a 658 radial slot 403, made by its circumference. On one edge of the ring seal 658 radial slot 403 ends of the ring semi-circular configuration, so that when the annular seal 658 adjacent to the housing 659 annular seal is formed distribution groove 145, as shown in Fig. On the other hand, you can use more than one radial slot 403. In the shown embodiment, the implementation of the annular seal 658 has also drilled a hole 404 in communication and perpendicular to the radial about the iesi 403. By pressurization into this hole 404 creates a contrast that prevent the ring seal 658 to move down under the influence of its own weight. When a different orientation of the valve, such as when turning 180°, hole 404 may be performed in the upper part of the annular seal 658. On the other hand, in the upper or lower parts, or both, may use more than one hole 404. When the orientation changes, for example, 90° would not require any counterweight. Since the annular seal 658 remains stationary and the stationary housing, the seal does not have to be round; fit other shapes, including oval and octagonal. O-ring seal can be made as one piece or may consist of two or more parts.

O-ring seal 658 pressed against the housing 659 o-ring seals and remains stationary even when the dispenser 50 flow (and o-ring seal 654, bearing plate arc 663 and ring 091) turns. Compressed air (or gas) passes through the radial channels 83, as shown by the arrows on Fig, and enters a radial slot 403 and the drilled hole 404, as well as in the distribution groove 145 between the o-ring seal 658 and 659 case, and in the gap between the safety ring seal 664 and the housing 659, is in the gaps between the arc 663 and housing 659 and mounting ring 091 and housing 659. During rotation of the distributor of the flow relative to a fixed housing 659 (and a stationary annular seal 658) the air in this gap seals these spaces, creating a continuous and does not create friction seal. Distribution groove 145 separates the outer surface of the annular seal 658 into three zones, two adjacent to the drilled hole, and the Central zone of positive pressure.

When using node with a single o-ring seal eliminates efforts that push or pull the seal with dual piston rings, separating them. In addition, the savings are achieved by reducing the number of parts, and only the ring can be made of a material larger in cross-section and, thus, can be made of a more stable component sizes. The ring can be cut into two halves in order to facilitate its installation and replacement. In recessed holes 405 (Fig) in the incision can be placed a compression spring or other dewatering means with the purpose applications outward efforts rings to the drilled hole.

On Fig shows how the camera 64, the supply shaft 52 with compressed air, is sealed relative to the drive shaft 52. The seal is made in a manner similar to the rotating port discussed above, and is shutting down, the seals are not under pressure and want to use only one piston ring for each seal above and below the chamber 64. For example, when using a seal above the chamber 64 therein form a C-shaped inner ring 216 by vitacilina Central groove. A stationary annular cylindrical wall 210, which serves as the outer annular seal includes an outer annular flange 211 used for the alignment of the walls 210 and securing it to the camera 64. Fixed piston ring 212 is inserted in a groove made in the C-shaped inner annular seal 216 is attached to the wall 210. Clearance between piston ring 212 and a channel-shaped inner seal 216, as well as the gap between the C-shaped inner seal 216 and the outer cylindrical wall 210 perceive any movement of the drive shaft 52 associated with thermal expansion and the like. A similar cylindrical wall 310, C-shaped inner seal 316 and piston ring 312 are used on the opposite side of the chamber 64, as shown in Fig.

On Fig and 9 presents the details of a suitable drive mechanism of the thread allocator. Pneumatic cylinder 800 is placed under the base 802 of the actuator and connect with him, for example, threaded rods, which are attached to the sleeve 805, in which the second placed bearing 806. The base 802 supports the sensor gap 803 mounted, as shown, the bracket 804, and opposite the rack rest on the brackets A, B. The control shaft 808 is inserted into the bearing 806. Spur gear 809 has a Central opening into which is inserted a shaft 808 to rotate the gears. From opposite sides of the toothed wheel 809 placed two toothed racks 810, each of which has a set of teeth that are aligned with the teeth of the spur gears 809 when properly installed relative to the wheel. Each toothed rack 810 is attached by suitable connections to the respective pneumatic cylinder 812 to bring the rails into action.

Next, with reference to 11 will be described actuation force actions or countermeasures to be applied in accordance with the present invention for obtaining a result of the movement of the valve without friction or practically without friction. The air cylinder 450 contains compressed air, preferably not less than 80 pounds. The air cylinder 450 communicates with the cylinder 812 of the drive mechanism, which moves the valve back and forth as described above. The cast cylinder 812 in effect controls the solenoid 451. The air cylinder 450 (or other air balloon) serves also as shown, the compressed air in the low pressure regulator 460 is in the regulator high pressure 461. Regulators 460, 461 are connected with the switch 465, which is preferably a solenoid. The solenoid switches the supply pressure of the air between the two regulators. As a means of security can be additional valve 467 emergency relief. If, for example, a power outage valve 467 emergency release will block the flow of compressed air used to seal the valve, forcing the valve down and open so the highway, so to prevent an excessive accumulation of heat in any layer of the regenerative oxidation. Gauge 468, pressure gauge and safety switch low pressure can also be used to monitor pressure and reducing the pressure as a safety measure in case of an accident.

When working in connection with a regenerative thermal oxidation installing the dispenser 50 flow during most of the time (e.g. about 3 minutes) is a stationary sealing position and is in driving mode only during cyclic changes (e.g. about 3 seconds). In a stationary position through the regulator high pressure 461, valve 465 and the drive shaft 52 exert a relatively high pressure to seal the valve of the flow relative to the valve seat (i.e. sealing plates is 100). The applied pressure must be sufficient to counteract the weight of the dispenser flow and to seal relative to the valve seat. Before moving the valve in approximately 2-5 seconds, the solenoid 465 switches with air supply from the regulator high pressure 461 on the flow of air from the low pressure regulator 460, thereby reducing the pressure applied to the valve flow (through the drive shaft 52), and allowing the thread allocator "slide" for the next move in his next position without friction or practically without friction. Immediately after reaching the following position solenoid 465 switches back to air flow from the low pressure regulator on the air supply from the regulator high pressure and pressure sufficient to re-seal valve, is fed through the drive shaft 52.

Specific values of pressure applied by regulators low and high pressure, partly depend on the size of the distributor pressure and can easily be determined by experts in the field of technology. As an illustration, you can specify that the valve can operate with a flow rate of 6000 CFM/min, detected the possibility of using low pressure of about 15 psi and high (sealing) a pressure of about 40 psi. For valve, capable of working with RA who move 10000-15000 cu.ft/min, discovered the possibility of using low pressure of about 28 psi and a high pressure of about 50 psi. For a valve capable of operating with a flow rate of 20000 to 30,000 CFM/min, detected the possibility of using low pressure of about 42 psi and a high pressure of about 80 psi. For a valve capable of operating with a flow rate of 35000-60000 cu.ft/min, detected the possibility of using low pressure of about 60 psi and a high pressure of about 80 psi.

In another implementation of the present invention to supply a suitable pressure on the drive shaft 52 is intended to seal and decompression valve 50 is used for the analog system. For example, as shown in figa, when the valve is in a compressed position, the signal can be routed to a pressure sensor which is connected with the regulator, such as an electro-pneumatic pressure regulator 700, preferably placed in a heated enclosure. This causes the controller 700 to put some pressure to seal the dispenser 50 thread. Move the pressure valve or directly in front of him, the pressure sensor gives a command to the controller 70 to reduce or remove the sealing pressure so that the valve 50 flow could move without contact with the sealing plate 100. In affect, the regulator regulates the pressure of the exhaust air, based on the control signal, which allows the air pressure in the range from zero to 100%. If the control signal is removed (for example, is reduced to zero), the controller reduces to zero pressure at the outlet, causing the dispenser flow down and break the seal one chamber from the other.

The amount of pressure applied as for lifting and sealing of the distributor 50 pressure, and for lowering and decompression valve 50, the pressure can be controlled through a programmable logic controller (PLC)connected to the pressure sensor. This helps to improve flexibility, since the exact value of pressure that must be applied, can be entered depending on the circumstances. For example, at a lower flow rate of gas passing through the oxidation installation, to seal the valve may require less pressure. PLC may change the amount of pressure applied to seal the valve, based on the various modes of operation. These modes may be sent or be recognized by the PLC and can continuously or continuously monitored and adjusted over time. For example, the pressure may be reduced when the mode is "warming up" in order to allow the valve to easily expand during operation at high temperature. In addition, giving the group may be reduced or increased based on changes in the gas flow as it passes through oxidative installation. This can be done to compensate for the aerodynamic characteristics of the valve (e.g., its tendency to rise or fall under the influence of air pressure). It is also possible that at the lower flow rate would require a high sealing pressure. This implementation variant is inherent also a sign of security, because in case of a sudden drop or complete cessation of flow, the pressure sensor can immediately reduce the sealing pressure to zero, which causes a drop in valve 50. The magnitude of the applied pressure can also be remotely monitored and entered.

On Fig illustrates an alternative implementation of the present invention. In this embodiment, the implementation in the drive shaft 52 of the flow distributor 50 is permanently attached to the sealing pressure and the force of the counter is used to adjust the sealing pressure during displacement of the valve. In the shown embodiment, the implementation of this effort counter is attached as follows. In the sealing plate 100 performs an annular cavity or groove 490 (shown in cross section). The annular groove 490 is communicated through the port 491, compressed air from a source 495. When moving the valve or directly in front of him (for example, 0.5 seconds) turns on the solenoid, and the compressed air is directed through the valve 494 reg is the generation of the flow in the annular groove 490 port 491. Sufficient pressure applied and distributed in the upper part of the valve by means of a groove 490 to correct sealing pressure, the dewatering valve in closed position. This creates a gap between the sealing plate 100 and the upper part of the distributor 50 flow, so that during movement of the flow distributor and the sealing plate is not in contact with each other. After completing the move, the air flow in the annular groove is reduced or terminated until the next cycle. As a result of high sealing pressure again seals the dispenser pressure against the sealing plate. Specialists in the art will easily determine the pressure required for the correction of high sealing pressure.

Additionally, compressed air is applied to the efforts of the counter can be used for cooling of the bearing drive shaft 409. With this purpose shows the cooling circuit, which feeds compressed air to the bearing 409 through the valve 494' flow control.

You can use alternative methods of application of force of counteraction to overcome high compactive efforts, which are included in the scope of the present invention. For example, on Fig illustrated cylinder 620, positioned so that when the actuation of the races is redemittel 50 flow out of the sealing plate 100. Thus, the cylinder 620 may be pressed against the pin 59 (5) of the Central axis of the distributor 50 flow with a force sufficient to counter the force of the high sealing pressure during displacement of the valve. After installation of the flow distributor in the new position of the cylinder can be allocated until the next cycle.

In one embodiment, the implementation may use magnetic forces to translate distributor of flow in the sealing position with the sealing plate 100 and to output it from the position of the seal when the valve to move. For example, an electromagnet mounted in the sealing plate 100 can be included for locking the valve on and off during the movement of the valve to allow the valve flow down from the position of the seal with a sealing plate to move without friction.

As mentioned previously, the present invention can be used with other valves, which are used to seal the air or other gas. For example, Poppet valves can stick to the valve seat lifting cylinder, similar to the drive shaft 52. The pressure used to seal the valve can be adjusted using the system, which is the subject of the present invention, depending on the conditions of the process. Therefore clicks the zoom, in case of regenerative thermal oxidation, if the process gas flow is below normal, the pressure applied to seal the Poppet valve, can be reduced compared with that required at higher process gas flow), while providing a sufficient seal. It can prolong the service life of the disc valve by reducing wear.

1. Way to move the valve from the first stationary position to the second stationary position, which contains:

providing a valve and valve seat, the valve is adapted to seal relative to the valve seat;

the seal of the valve relative to the valve seat by the application of force to bias the valve towards the valve seat when the valve is in the first fixed position;

lowering actions of this effort to the extent sufficient to breach the specified seals;

the valve to move to the second stationary position;

the resumption of efforts to seal the valve relative to the valve seat when the valve is in the second fixed position.

2. The method according to claim 1, in which the effect of this effort is reduced through application to the valve efforts of resistance.

4. The method according to claim 2, in which the valve seat has an annular groove, and the force of the counter is applied by compressed air in the specified slot.

5. The method according to claim 1, in which the specified force is applied using an electromagnet that pulls the valve to the valve seat, the force reduced by de-energizing the electromagnet.

6. Device to reduce friction during movement of the valve containing:

the thread allocator;

valve seat;

the actuator associated with the valve threads, designed to move the dispenser flow from the first stationary position to the second stationary position;

a source of compressed gas which communicates with the flow distributor;

the first regulator is designed to supply compressed gas to the valve flow under the first pressure sufficient to seal the dispenser of the flow relative to the valve seat when the valve flow is or in the first or second stationary position; and

the second regulator is designed to supply compressed gas to the valve flow under a second pressure lower than the first pressure, when RA is Opredelitel thread moves between the first and second stationary positions.

7. The device according to claim 6, which contains the solenoid associated with the first and second regulators to determine in the sequence, which gives regulators the specified compressed gas in the thread allocator.

8. The device according to claim 7, which also contains the emergency release valve to selectively prevent the flow of the specified compressed air stream in the flow distributor.

9. The device according to claim 6, in which the actuator includes a hollow drive shaft, while compressed air is supplied to the dispenser flow through the hollow drive shaft.

10. The device according to claim 6, in which the flow distributor includes an upper surface having multiple holes, and the seal is formed by compressed air flowing from these holes, and creating an air cushion between the upper surface and the valve seat.

11. Way to move the valve from the first stationary position to the second stationary position, which contains:

providing a valve and valve seat, the valve is adapted to seal relative to the valve seat;

providing compressed gas;

the shift valve toward the valve seat to seal the valve when the valve is in the first stationary position, by submitting to the valve of the compressed gas under a first pressure sufficient DL is create a specified seals;

disturbance of seals by feeding compressed gas into the valve under a second pressure lower than the first pressure;

the valve to move to the second stationary position; and

the shift valve toward the valve seat to seal the valve when the valve is in the second fixed position, by submitting to the valve of the compressed gas at a third pressure that is sufficient to create a seal.

12. The method according to claim 11, in which the first and third pressure are approximately equal.

13. The method according to claim 11, in which the valve includes a hollow drive shaft, while compressed air is supplied to the valve through the hollow drive shaft.

14. The method according to claim 11, in which the flow distributor includes an upper surface having multiple holes, and the seal is formed by compressed air flowing out of the holes and creates an air cushion between the upper surface and the valve seat.

15. Device to reduce friction during movement of the valve containing:

the thread allocator;

valve seat;

the actuator associated with the valve flow, and designed to move the dispenser flow from the first stationary position to the second stationary position;

a source of compressed gas which communicates with the flow distributor;

p num="132"> the pressure regulator designed to supply compressed gas to the valve flow under the first pressure sufficient to seal the dispenser of the flow relative to the valve seat when the valve flow is or in the first or second stationary position, and to supply compressed gas to the valve flow under a second pressure lower than the first pressure when the flow distributor is moved between the first and second stationary positions.

16. Regenerative thermal oxidation plant for processing gas containing:

the zone of combustion;

hood;

the first heat transfer layer containing a heat-exchange medium, and is connected with the zone of combustion and exhaust hood;

the second heat transfer layer containing a heat-exchange medium, and is connected with the zone of combustion and exhaust hood;

at least one valve for switching between the first stationary mode, passing the gas stream in the first heat exchanger layer, the move mode and the second stationary regime, passing the gas stream in the second heat exchanger layer, and the valve includes a valve actuator and a valve seat;

means for sealing the valve relative to the valve seat when the valve is in the first or second stationary modes; and

with adsto for decompression valve, when the valve is in move mode.

17. Installation according to clause 16, in which the means of sealing the valve provides a flow of compressed gas through the valve under a first pressure sufficient to generate an air cushion between the valve and valve seat.

18. Installation according to 17, in which the tool decompression valve provides a flow of compressed gas through the valve under a second pressure lower than the first pressure.

19. Installation according to clause 16, in which the tool valve seal ensures the application of force to the valve to valve in sealing position relative to the valve seat, the tool decompression valve provides the application the efforts of the counter-opposite to the specified torque.

20. Installation according to claim 19, in which the specified force is applied by the compressed gas through the shaft below the first pressure and the indicated force counter supplied by compressed air at the second pressure to withstand the specified force to the extent sufficient to breach the seal.

21. Installation according to clause 16, in which the valve is a Poppet valve.

22. Installation according to item 21, which also contains at least one valve in a pressurized pipeline, designed to control the flow of the sealing gas to the sealing surface section on the Snov position Poppet valve.

23. Installation according to clause 16, in which the valve is a butterfly valve.



 

Same patents:

FIELD: power engineering.

SUBSTANCE: invention is related to method of energy saving in production of aluminium. In the method by heat of anode gases by means of evaporation-condensation utiliser with vacuum pump, water economiser and steam reheater water is heated and evaporated and water steam is reheated and sent to production and rotation of steam turbine together with generator that generates electric energy, and spent steam of steam-turbine cycle of steam-turbine plant is condensed in condenser, serially compressed upstream and downstream deaerator with condensate and feed pumps, besides, with nitrose component of anode gases synthesis is performed in complex of nitric acid preparation, and also hot air is removed by probe from electrolytic cell surface, at that with part of heat water is heated and evaporated in evaporating condensation heat utilizer at vacuum pulled with vacuum pump, steam is reheated in reheater and sent for production, and with remaining part of heat at first low boiling body that rotates turbine together with generator that generates electric current is reheated in evaporator that is the element of low-temperature cycle, and then condensed in condenser and sent back to evaporator with pump.

EFFECT: useful utilisation of heat exhausts and nitrose components of anode gases, and also heat exhausts through external surface of electrolytic cell.

1 ex

FIELD: metallurgy industry; other industries; methods of firing of the heating and thermal furnaces for the low-oxidizing and non-oxidizing metal heating.

SUBSTANCE: the invention is pertaining to the field of metallurgy industry for the low-oxidizing and non-oxidizing metal heating in the firing and thermal furnaces. The method of firing of the heating and thermal furnaces for the low-oxidizing and non-oxidizing metal heating includes usage of two periodically operating burners equipped with the individual regenerative heat-exchange nozzles. At that in each of the burners alternately exercise the process of combustion of the gas or withdrawal of the combustion products from other burner with their subsequent refrigeration in the heat-exchange nozzle, the air feeding for the gas combustion and withdrawal of the combustion products is exercised by the appropriate pipe ducts through heat-exchange nozzles and the gas passing channels connecting the working space of the furnace with the heat-exchange nozzles. At that the change of the mode of combustion of the gas for the mode of withdrawal of the combustion products and vice versa execute by switching of the streams of the air and the combustion products by means of two fly gates mounted on the pipe ducts. In the burners execute the process of the incomplete combustion of the gas with the heated primary air or withdrawal of the products of the incomplete combustion of the gas from other burner with their subsequent afterburning in the stream of the cold secondary air. The afterburning is exercised before their refrigerating in a heat-exchange nozzle. The air supply for the gas combustion execute by two streams. Directly into the burners feed the primary air constituent the part of the stream necessary for the complete combustion of the gas, and the rest part - the secondary air is fed into the over-nozzle space of the burner working in the mode of heating of the heat-exchange nozzle. The secondary air is fed into the gas-passing channel being in the mode of the heating of the heat-exchange nozzle - into the above-nozzle space in the place located before the inlet of the combustion products into the heat-exchange nozzle. Feeding of secondary air into the gas-passing channel is executed compulsorily by means of the separate bang-bang gate installed with the capability of the synchronous operation with the bang-bang gates for change of the operation mode of the work of the burners. The secondary air is fed by the way of the natural suction of the atmospheric air into the gas-passing channel through the unidirectional fluid valve installed on the air duct of the secondary air feeding at the expense of rarefaction which is created by the f smoke sucker in the gas-passing channel being in the mode of withdrawal of the combustion products. The invention allows to reduce the losses of the metal caused by the scaling in the process of heating of the furnace at the expense of the low oxidizing ability of the products of the incomplete combustion of the fuel at the complete utilization of the heat of the exhaust combustion products.

EFFECT: the invention ensures reduction of the losses of the metal caused by the scaling in the process of heating of the furnace at the expense of the low oxidizing ability of the products of the incomplete combustion of the fuel at the complete utilization of the heat of the exhaust combustion products.

5 cl, 5 dwg

FIELD: extraction of rare metals from mineral raw materials, possibly extraction of rhenium and associated metals such as bismuth, germanium, indium, gold, silver, cadmium, antimony and others from exhaust gases of acting volcanoes, for example from fumarole gases, gaseous emanation of lava flows, lava lakes and so on.

SUBSTANCE: apparatus includes housing with lid for collecting volcano gases, gas conduit for transporting volcano gases, tower connected with gas conduit and filled with adsorbent interacting with volcano gases fed from gas conduit. Tower for removing filtered gases is communicated through tube with exhaust fan connected to power generator. That tower through window is communicated with movable vessel for adsorbed mass saturated with rhenium and associated metals. Gas conduit for transporting volcano gases is in the form of tube made of stainless steel coated with heat resistant material. Diameter of gas conduit is in range 100 - 200 mm; its length is no less than 20 m. Tower is made of stainless steel, carbon or graphite plates. Tube for removing filtered gases is made of stainless steel and it has diameter about 0.15 m and length 4 - 10 m. Exhaust fan is connected with tube for discharging waste gas.

EFFECT: versatility of apparatus used for selective extraction of rhenium and associated metals from fumaroles of volcanoes for receiving rare earth metal concentrate suitable for further industrial processing.

7 cl, 1 dwg, 1 ex

FIELD: power engineering.

SUBSTANCE: valve comprises rotatable housing provided with passage, outer unmovable ring seal of the housing, ring seal between the rotatable housing and outer unmovable ring seal of the housing that has bore made for permitting gas to flow to the passage or from the passage. The ring seal is movable with respect to the outer ring seal of the housing. The passage and the bore are made for permitting receiving the compressed gas to provide continuous sealing between the outer ring seal of the housing and ring seal when the housing rotates. The valve is additionally provided with means for permitting gas to flow through the radial passage and between the ring seal and outer unmovable ring seal of the housing and setting ring connected with the rotatable housing and locking ring that is mounted at a distance from the setting ring and connected with the rotatable housing. The ring seal is interposed between the setting ring and locking ring.

EFFECT: simplified structure and enhanced efficiency.

16 cl, 30 dwg

FIELD: combustion apparatus.

SUBSTANCE: method comprises using two periodically operating burners provided with regenerative heat-exchanging nozzles. Each of the burners provide combustion of gas or discharging the combustion products with their subsequent cooling in the heat-exchanging nozzle. The air for the combustion of gas and discharging the combustion products is supplied through the pipelines, heat exchanging nozzles and gas passages that connect the working space of the furnace with the heat-exchanging nozzles. The combustion regime changes for the regime of discharging the product of combustion and vise versa by connecting the air flow and combustion products by means of valve mounted on the pipelines. A portion of the discharged combustion products is directed to the inlet of the air duct device. The amount of combustion products should be sufficient for the decrease of concentration of oxygen in the air supplied for the combustion of gas down to 13-18%.

EFFECT: enhanced efficiency.

1 cl, 3 dwg

FIELD: electrochemical industry; methods of baking of the graphitized electrodes, etc.

SUBSTANCE: the invention is pertaining to the method of baking of the products containing as the binding agent a resin or a pitch, for example, graphitized electrodes. The method of baking of the products containing as binding agent resin or a pitch, includes a pre-heating of the products by the gases outgoing from the baking chambers, the products baking and refrigeration, incineration of the fuel and a part of the escaping from the products pyrolized gases in the chambers of the baking, the products subjected to the baking are put in the containers combined in the blocks; all the escaping from the products pyrolized gases are withdrawn from each block of the containers as the separate stream, integrate the streams within the limits of each chamber into a common stream, which is withdrawn beyond the limits of the chamber, integrated with the streams from the other chambers and directed for incineration into the baking chamber, and in the containers maintain the pressure equal to or greater than the pressure in the corresponding chamber. The device includes the multichamber baking furnace with the burners to maintain the necessary temperature mode of baking and the tools for transportation of gases from the chambers of preliminary heating into the baking chamber and for transportation of the high-temperature gases from the baking chambers into the chambers of the preliminary heating. The chambers are supplied with the containers integrated in the blocks with the lids, which are linked to each other among themselves within the limits of the block by the branch-pipes for withdrawal of the pyrolized gases into the gas-collecting main located inside the chamber and connected with the branch-pipes for the gases withdrawal from the blocks of the lids and with the branch-pipe for removal of the pyrolized gases beyond the limits of the chamber. The branch-pipe is supplied with the tools to control the pressure inside the containers. At that the branch-pipes for withdrawal of the pyrolized gases from the separate chambers are connected with the outside located main, which is connected to tool used for delivery and incineration of the pyrolized gases in the baking chamber. The invention ensures the increase of the ecological and economical efficiency of the baking process in the multichamber baking furnaces.

EFFECT: the invention ensures the increase of the ecological and economical efficiency of the baking process in the multichamber baking furnaces.

2 cl, 4 dwg, 1 ex

FIELD: heat power engineering.

SUBSTANCE: method comprises vibration fluidizing of the layer of the grain nozzle and heating the heat-transfer agent up to a temperature 200-220ºC, at which toxic agents are absorbed by the particles of the grain nozzle. The heat transfer agent is then purified by flowing it through a water filter and heat is accumulated in the tank heat exchanger to transfer the heat to the other heat transfer agent.

EFFECT: enhanced efficiency.

1 dwg

FIELD: the invention refers to apparatus of regenerative thermal oxidation with multi pass valves.

SUBSTANCE: the apparatus for regenerative thermal oxidation for gas processing has a combustion zone, the first heat exchanging layer keeping heat exchanging surroundings and connecting with the combustion zone; the second heat exchanging layer keeping heat exchanging surroundings and connecting with the combustion zone; a valve for alternate direction of the gas flow between the first and the second heat exchanging layers. At that the valve has the first valve passage and the second valve passage separated from the first valve passage; a flow distributor having an admission passage communicates with the help of fluid medium with the admission opening of the surroundings and an exhaust passage communicates with the help of fluid medium with exhaust opening of fluid surroundings. At that the distributor is fulfilled with possibilities of its the first and the second valve passages between the first position in which the first valve passage communicates with the help of liquid with the admission passage and the second valve passage communicates with the help of liquid surroundings with exhaust passage and the second position in which the indicated the first valve passage communicates with the help of the fluid surrounding with exhaust passage and the second passage of the entry of the valve with the help of liquid surroundings communicates with the admission passage. At that the distributor of flow has a blocking surface which blocks the flow through the first part of the first valve passage and through the second part of the second valve passage when the distributor of the flow is between the first and the second positions and is fulfilled with possibility of its turning to 180o between the first and thesecond positions. At that valve passage is divided as the first so is the second at least into two chambers and the first and the second parts of the valve passages are congruous.

EFFECT: simplifies the construction, provides comfort of controlling and exploitation and deep removal of volatile organic combinations.

22 cl, 12 dwg

FIELD: structural members of tube furnaces of the petroleum refining industry, in particular, construction of the lining of the smoke flue of the vertical multichamber radiant-convective furnace used in installation of catalytic reforming, hydrofining and aromatization.

SUBSTANCE: the construction has vertical walls: an inner wall engageable with the working space of the furnace radiant chambers and having holes for passage of flue gases, and an outer wall located on the side of the furnace jacket, made of tongued refractory products laid in rows in a broken joint and with expansion joints of the tongued refractory products and having on the side of the flue mirror-located projecting rows of supporting products positioned one under another in height of the flue, the connecting partitions are made of refractory shaped members installed on the projecting rows forming the horizontal tunnels of the flue, and a heat insulation adjoining the jacket. The novelty is in the fact that each member of the partitions is made in the form of two refractory shaped products installed for independent displacement relative to each other in the vertical axis of the flue at a thermal expansion of the lining walls and interconnected by means of L-shaped bulges made on the ends of the products, facing the flue axis and built in the vertical walls by other tongued ends laid on the supporting beveled products of the projecting row, the outer wall is made tied to the jacket for displacement in the vertical axis of the flue at a thermal expansion of the lining by means of successively engageable shaped members with holes positioned in rows in the lining of the outer wall at an interval of 6 to 9 rows, shackles with one end installed in the hole of the product, and with the other - in the hole of the angle piece welded to the jacket; all the products of the lining are dry laid, with the vertical expansion joints between each product. The outer and inner vertical walls with built-in refractory shaped members of the partitions are made of materials with a different coefficient of linear thermal expansion, larger one at the outer wall.

EFFECT: enhanced stability of the smoke flue lining due to enhanced building strength of it at a thermal expansion.

4 cl, 2 ex, 5 dwg

FIELD: collection of hot gases emanating in production processes.

SUBSTANCE: the invention is dealt with collection of hot gases emanating in production processes and may be used for collection of hot gases on fumarole fields of the active volcano containing water steam and corrosion-active gases. The device contains a collector made in the form of the sealed tunnel provided with two units of gas withdrawal. The tunnel represents a self-supporting curved arch made out of the ceramic heat-insulating acid-proof materials and mounted with use of an acid-proof metal formwork, and protected from above by a sealed acid-resistant casing. The technical result is simplicity of mounting and operation of the sealed heat-insulated device for collection of hot gases with a high share of water steam and corrosion-active compounds.

EFFECT: the invention ensures simplicity of mounting and operation of the sealed heat-insulated device for collection of hot gases with a high share of water steam and corrosion-active compounds.

3 cl, 3 dwg, 1 ex, 1 tbl

FIELD: production of stop valves.

SUBSTANCE: invention relates to production of stop valves and is designed to be used at industrial pipelines as a combined shut-off control. The combine motor and manual control valve incorporates a casing accommodating a forced engagement cam coupling moving axially, the said cam coupling forced travel mechanism with the cam coupling retainer and an output gear-shaft fitted aligned with the motor shaft and furnished with a brake. The manual back-up flywheel shaft axis in the casing is perpendicular to the motor shaft. The manual back-up shaft is linked, via a bevel gear, with a bevel hear wheel fitted aligned with the motor shaft. The bevel gear wheel inner surface is furnished with cams. The aforesaid cam coupling is made up of two half-couplings, the first one being a split one containing a cup accommodating a splined yoke turning around its axis. The yoke outer side surface is furnished with cams to interact with the gear wheel cams. The cup is furnished with a shoulder arranged at its top part. The said cup side surfaces have, at least, two holes with working profile surfaces. The cup outer end face surface houses, at least, two opposing cams. A guide shaft supporting the first half-coupling cup is splined on to the motor shaft. The guide shaft side surface accommodates the pins fitted to interact with the cup working profile surfaces. The guide shaft free end accommodates the second half-coupling with cams arranged on its end face surface to interact with the cup end surface cams. The second half-coupling side surface is furnished with lengthwise slots receiving the splined sleeve splines. The output gear shaft is keyed in the second half-coupling. The cam coupling forced travel mechanism is provided with a lever-yoke to interact with the first half-coupling cup shoulder.

EFFECT: higher safety of thrive control due to elimination of impact loads in the manual back-up flywheel.

2 cl, 10 dwg

FIELD: engines and pumps.

SUBSTANCE: fluid medium valve incorporates a body with an inlet and outlet, a movable valve element to rest against the valve seat for closing the valve, a control chamber formed on the movable element side at a distance from the valve seat and making the valve working space communicating, via a throttling channel, with the inlet, and means allowing the fluid medium to flow out from the control chamber to open the valve and forced, further on, to the movable element side other part communicating with the outlet, the valve movable element moving from the valve seat. The valve movable element is arranged to move along the valve element fixed in the valve body. For this, the valve elements are furnished with tubular sliding surface and a complementary circular sliding edge of appropriate diameter mating the said tubular surface and forms a sealing increasing the valve working volume. The valve working volume is additionally limited by the second sealing formed by the valve elements with the second tubular sliding surface with the diameter different from that of the first sliding surface, and the second complementary circular edge with, certainly, a different diameter and mating the second surface. The valve seat is arranged between the smaller diameter sliding surface and the greater diameter sliding surface if seen in axial direction. The method of forming the fluid medium pulse by fast opening and/or closing the valve is also proposed.

EFFECT: high-efficiency valve operation.

16 cl, 5 dwg

Electric drive // 2330204

FIELD: electricity.

SUBSTANCE: device may be used for control of stop valves in main oil pipelines. Electric drive contains manual doubler and provides self-breaking to outlet link. This is achieved by the fact that electric drive contains double-stage reduction gear, in which as first stage worm gear is used with casing that has the possibility of unfixing and serves as rotating element of manual doubler.

EFFECT: simplification of electric drive design.

3 dwg

FIELD: engines and drives.

SUBSTANCE: device incorporates two electric magnets and two hermetically-sealed reed relays in a blast-proof jacket, air-operated valves, and a panel with lines feeding gas into the ball-valve inlet and forcing it therefrom. The device incorporates an automatic emergency ball-valve shut-off device designed as an air-operated cylinder with a gauging gate reacting to the pressure drop rate in the gas main. With the said drop rate exceeding the preset one, the aforesaid air-operated cylinder gets triggered off to move the rod to actuate a spring mechanism cutting in the ball-valve shut-off air-operated valve. The device is furnished with a spring-loaded plate incorporating an adjusting screw, a rotary lever with a permanent magnet arranged on the lever one end. Here note that the lever is bracket-mounted on the blast-proof jacket inside which a third hermetically-sealed reed relay. The aforesaid rotary lever is designed so that its permanent magnet can act on the third extra said reed relay in operation of the spring mechanism. Here, the rotary lever is coupled via an extra spring with the panel so that the lever other end is in a constant contact with the spring-loaded plate adjusting screw.

EFFECT: higher reliability.

6 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to valves and accessories and can be used as a relief valve for liquid and gaseous working media. The valve has a body with a threaded cover, a spring-loaded shut-off element with a stem, a seat in the form of a branch pipe with a sealing cup arranged on the said pipe end face, a throttling plate, a spring, a guide bush made from non-magnetic material, the body crosswise partition, a magnetic system made up of two annular permanent magnets, a magnetic element, a magnetic conductor, a magnetic conducting washer. A washer is arranged between the magnets. The latter are fastened by bushes made from non-magnetic material in annular magnetic conductors. The said conductor inner cylindrical parts are furnished with tapered grooves. The lower annular magnetic conductor with the guide bush made from non-magnetic material is arranged inside the body so as to axially move and is spring-loaded to the cover via a sleeve from non-magnetic material. The upper annular magnetic conductor is formed by the cover and a threaded regulator screwed in the cover. The magnetic element is fitted on the magnetic conductor threaded bush. The throttling element is arranged at such a distance from the shut-off element that, with the latter seating on the valve seat, the distance from the branch pipe end face to the upper annular magnetic conductor equals the magnetic conducting washer travel to the upper annular magnetic conductor. A total travel of the shut-off element significantly exceeds the sum of the distance from the branch pipe end face to the throttling plate end face and the thickness of the said plate. The distance between the end faces of magnetic element and magnetic conducting washer is smaller than the distance between lower end faces of the annular magnetic conductors in a certain range.

EFFECT: smooth adjustment of working medium pressure difference, efficient protection against abrupt increase in working medium pressure, higher accuracy, reliability and efficiency.

1 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to pipeline valves and accessories and is designed to control the higher-pressure working medium feed in liquid- and air-operated systems. The electrically-controlled metering valve has a body with inlet and outlet channels. The body accommodates a spring-loaded electrically-driven plunger. The said plunger drive is made up of two spaced apart electrical coils connected via a control unit to a current pulse generator. A moving plate magnetically-coupled with the said coils is arranged between them and connected to one end of the aforesaid plunger. The other end of the latter accommodates the inlet channel shut-off element. The plate is made from a non-magnetic material with a specific ohmic resistance allowing generation of eddy currents in the said plate on feeding current pulses to any aforesaid coil.

EFFECT: valve faster response to control signals, higher reliability and expanded performances.

3 cl, 1 dwg

Final-control valve // 2329425

FIELD: engines and pumps.

SUBSTANCE: invention relates to pipeline valves and accessories, primarily, to final-control valves designed to be use at whatever power generation plants in steam and condensate level control systems. The final-control valve incorporates a body with an inlet and outlet branch pipes, a fixed and moving section-opening plates arranged on a common shaft, the said openings allowing the working medium flowing through. The moving plate turns, driven by a driving element, relative to the fixed plate. The body is made in the form of a basic bush with an auxiliary bush attached to the former at the angle of, for example, 90°. The said auxiliary bush accommodates rotating driving element made as a shaft with a bevel pinion. The moving plate side surface has partial or complete teeth of a bevel pinion to mesh with the bevel pinion. An additional fixed plate with openings for medium to pass through and an annular ledge interacts with the moving plate, the said ledge isolates the bevel pinion teeth from the medium.

EFFECT: simpler design and manufacturability, lower friction between interacting elements.

7 cl, 3 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to pipeline valves and accessories and is designed to control flow rates of liquid or gaseous media, including aggressive, explosive and toxic media. The multipurpose single-stage valve incorporates a body with inlet and outlet branch pipes, an actuator and a unit transmitting adjusting forces from the control device made up of a coupling with a permanent magnet radial system. The actuator is arranged perpendicular to the body lengthwise axis and made up of a fixed seat with through openings and a moving plate-type multipurpose slide valve, the latter being arranged on the end face of the driven half-coupling with the said radial system of permanent magnets. The aforesaid driven half-coupling is arranged aligned with the body and interacts with the radial system of permanent magnets of the driving half-coupling. The said driving half-coupling is arranged outside the body aligned with it and coupled with the drive that makes it move. The radial system of permanent magnets of the driven half-coupling is axially shifted relative to that of the driving half-coupling by a preset size depending upon the valves diameter and working medium pressure.

EFFECT: higher safety, tightness, reliability and longer life, given there is no contact between working medium and driving mechanism.

2 cl, 2 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to production of valves and accessories and is designed to control rotary-type actuators. The air-operated drive has a body accommodating a reciprocating spring-loaded piston interacting with limiting elements arranged in rectangular slots. The piston is a cup with a bottom and a cylinder. The mechanism converting the piston reciprocating motion into the actuator rotary motion consists of a driving shaft with a nose-piece coaxially fitted thereon. The said nose-piece is linked kinematically, via helical grooves, with the piston. Rectangular slot and helical groove are made in the cylinder on the piston outer surface. The nose-piece has a plate with a segment slots. The body incorporates ledges arranged in the said segment slots. The spring is arranged to interact with the bottom and ledges.

EFFECT: maximum output torque for preset overall sizes of the body and higher accuracy of the drive shaft turn angle.

3 dwg

FIELD: mechanic engineering.

SUBSTANCE: invention is related to valve manufacture industry and valves with rolling orifices, in particular. It is designed to control liquid flow rate. Orifice control valve consists of a body with inlet and outlet connections and valve seat. It is situated between inlet and outlet connections. Cutoff member enclosure is projected from valve body between inlet and outlet connections. Partially, section of internal cutoff member enclosure volume makes up control chamber. Cutoff member can be displaced. Its part is installed inside body to enable cutoff member displacement between open or closed positions of the valve. Elastic orifice is connected leak tight to cutoff member and makes leak proof control chamber with regard to part of inlet connection. This orifice has S-shaped cross-section and is made so that cutoff member displacement value inside body at each side is about 20% of outer orifice diameter with regard to central plane of connection between orifice and cutoff member body. Common value of cutoff member displacement inside its body is, at least 40% of outer orifice diameter. Cutoff member can be smoothly displaced in longitudinal direction inside cutoff member body. To direct cutoff member movement, at least one side body surface is provided with a large number of longitudinal vanes. There is design option of orifice control valve manufacture.

EFFECT: simplification of valve design; high liquid flow rate under minimum hydraulic losses.

19 cl, 13 dwg

Controlled valve // 2244187

FIELD: valving.

SUBSTANCE: controlled valve has housing with inlet and outlet branch pipes and pipe for recirculation of fluid.

EFFECT: simplified design and enhance efficiency.

3 dwg

Up!