Plant for continuous feed of powdered hard material into pneumatic transport pipeline

FIELD: transport.

SUBSTANCE: invention refers to the area of pneumatic transport of powdered hard material. Plant is designed for the continuous feed of powder hard material from the service tank (10) into the pneumatic transport pipeline (12, 12'). This plant contains the first (14) and the second (16) intermediate tanks installed near each other. The first intermediate tank (14) is built in the form of sluice tank with the upper sluice valve (18) and the lower sluice valve (20). The second intermediate tank (16) is built in the form of injection tank. Between the lower sluice valve (20) of the first intermediate tank (14) and the upper inlet (30) of the second intermediate tank (16) the system (50) of intermediate pneumatic transport is located to transmit the powdered hard material from the first intermediate tank (14) into the second intermediate tank (16). System (50) is provided with the device for material fluidisation.

EFFECT: provides simplification of construction.

9 cl, 1 dwg

 

The present invention relates to a device for the continuous supply of powdered solid material in a pneumatic conveying pipeline.

The level of technology

In the prior art there are two different methods of continuous flow through the gateway powdered solid material, in particular coal dust from the supply tank to the pneumatic pipeline.

In the first method uses two intermediate containers placed vertically one above the other under the spending capacity. Upper intermediate tank performs the function of lock capacity. It is in the mode with the following recurring cycle: (1) filling the upper intermediate tank at atmospheric pressure powdered material from feed tank, (2) isolation of the upper intermediate capacity relative to the feed tank, (3) establishment of an upper intermediate tank of high pressure, (4) emptying under pressure upper intermediate tank, which contained in it the material is poured under its own gravity in the bottom of the intermediate tank, (5) insulation upper intermediate vessel relative to the bottom of the intermediate tank and (6) discharge pressure from the upper hearth. Lower intermediate tank performs the function of the discharge vessel, which the traveler is constantly under pressure and from which the powdered solid material is continuously fed into pneumatic transport pipe.

In the second method uses two identical intermediate capacity available under the expenditure capacity next to each other and connected in parallel circuit. Both of these intermediate capacity function and rotary, and pressure vessels. Both vessels operate with the same, repetitive cycles, which, however, shifted in time so that at each moment in time from one of two containers of powdered solid material is continuously injected into pneumatic transport pipe, and the other intermediate tank at this time is filled with powdered material from the supply tank.

Layout with vertical intermediate tanks, one under the other and their connection through the serial scheme is mostly used if necessary powdered solid material in a large number of transport pipelines. Layout with horizontal intermediate containers next to each other and their connection to the parallel scheme is mainly used if necessary powdered solid material in one transport pipeline or in a small number of them.

In EP 0362120 the described device for the continuous feed of the granular material in a pneumatic conveying installation, sod is rashee connected across the serial circuit gateway and feed bins. A lock hopper is located above supply tank and communicated with him his discharge, open and close the exhaust valve. When emptying the gateway hopper it creates excessive pressure, which contributes to the discharge of his bulk material in the supply hopper.

B US 4599017 described the feeder transport pipeline powdered solid material to many places of delivery. Transport pipeline is executed in the form of an annular pipe with feed capacity, discharge capacity and intermediate containers, one for each delivery location powdered solid material. The supply tank is clearly above the discharge capacity and emptied it through a check valve. At the time of filling in the discharge vessel powdered solid material submission to the transport pipeline is interrupted, which does not allow to speak about a continuous feeding of powdered solid material in the transport pipeline.

In WO 87/04415 described device for moving bulk material in the vessel. This installation contains at least one supply tank positioned below the deck, the boot device is placed on the upper deck of the vessel, the transport pipeline connecting the supply tank with zagrosek the first device, and the supply pipeline connecting the boot device to the place of unloading of the bulk material. The boot device contains at least two boot capacity. Both the boot capacity can work in rotation mode, in which one of them is filled with loose material supplied through the transport pipe, and the other of them at this time emptied by selecting from it the bulk material in the supply pipeline. To fill one of the boot tanks of bulk material in the supply tank is pressurized, and the boot capacity is connected with the atmosphere, resulting due to the resulting pressure difference granular material is pneumatically moved from the supply tank to above her boot capacity. For emptying the boot capacity it creates increased pressure. For continuous feeding of bulk material in the supply pipeline similar device must have at least two connected in a parallel circuit, the boot capacity.

Both known composition, i.e. the composition with the intermediate connection of the containers in a series circuit design, and layout of their connection to the parallel scheme, have certain disadvantages.

The disadvantages of the layout with a vertical position intermediate the tanks, one under the other and their connection to the serial circuit includes, for example, the following:

large structural height, it should be noted the fact that over the two intermediate containers placed vertically one above the other, it is necessary to place a large supply tank;

- a relatively large diameter fittings (gravity) of the pipeline between the lower output (discharge) hole upper intermediate tank and the upper input (boot) hole bottom hearth. Running the connecting pipe of large diameter is necessary in order to ensure the possibility of bypass solid material under pressure from the upper tank at the bottom. It is obvious, however, that due to the large diameter of the connecting pipe at the outlet, respectively, at the input of both tanks need to install bulky and expensive valves. In addition, it should be noted, and the fact that installed at the outlet of the upper rotary tank shut-off valve is exposed at the opening of the effects of powdered solid material, and with the increase of the diameter of the valves is complicated by its opening;

relatively frequent, as experience shows, the failure in the bypass powdered solid material through the gateway. In fact, when creating increased pressure of locking the second tank inside the solid material is compressed or compacted, why, even despite the large diameter of the rotary vessel and applying a loosening device during the unloading of her bulk material, you may experience delays, disruptions or stop.

The disadvantages of the link connection of the intermediate tank via the serial scheme include the following:

each of the intermediate tank is required to equip a complete loosening and discharging devices, respectively, for the formation of a mixture of solid material and the fluid, and feeding the mixture into the transport pipeline;

to ensure a supply of powdered solid material in several transport pipelines is possible only at considerable cost;

- frequent, as experience shows, fluctuations quantitative consumption of the unloaded material observed each time when switching from one tank to another. Completely eliminate such fluctuations cannot even using complex and expensive solutions.

The objective of the invention

The present invention was based on the task of developing a simple device for the continuous supply of powdered solid material in a pneumatic conveying pipeline, which would not have at least part of the disadvantages inherent in prior devices. This problem is solved with p the power device, claimed in claim 1 of the claims.

A brief description of the invention

Proposed in the invention is a device for the continuous supply of powdered solid material from the supply tank into pneumatic transport pipe includes first and second intermediate tank. The first intermediate tank forms a gateway capacity with top gateway shutter to enable replenishment of the powdered solid material from the feed tank, and the lower gateway shutter enable emptying. The second intermediate tank forms a discharge vessel with an upper inlet for adding powdered solid material from the first intermediate tank and a lower outlet for the continuous feed of powdered solid material in a pneumatic conveying pipeline. According to the invention the first and second intermediate tank installed next to each other, and between the lower gateway gate of the first intermediate tank and the upper inlet of the second intermediate tank is located intermediate system pneumatic device for fluidization, providing the opportunity powdered solid material from the first intermediate tank to the second intermediate tank. Use the W to move powdered solid material from the first intermediate tank to the second intermediate system pneumatic device for fluidization allows to avoid additional costs on the equipment needed to move the powdered solid material under pressure from one hearth to another under its own gravity, and thereby exclude the likelihood of failures in the process of such movement powdered solid material. From the second constantly under pressure to an intermediate tank mixture of fluid and solid material is continuously fed into one or more transport pipelines. In the proposed invention the device has only one loosening and discharging device and is caused by switching between tanks fluctuations quantitative consumption of the unloaded material is completely absent. It should also be noted that the implementation of the interim pneumatic conveying of powdered solid material between the two installed next to each other intermediate containers requires only a slight excess pressure in the first intermediate tank and that it requires only a small additional amount of compressed gas compared to its consumption required for powdered solid material from one hearth to another under its own gravity.

Both are installed next to each other intermediate tanks prefer is Ino to provide total system pressure maintenance, consequently, the overall system pressure relief.

The total pressure maintenance system contains, for example, the total gas-feeding pipe, a fixed control valve, the first connection with the installed first shut-off valve to the first intermediate tank and a second connection with the installed second shut-off valve to the second intermediate containers.

The total pressure relief system contains, for example, a common exhaust pipe line, a fixed control valve, the first connection to the first intermediate tank installed it the first shut-off valve and the second connection to the second intermediate tank is installed in the second shut-off valve.

In the proposed invention the device is necessary and sufficient to have only one required for its operation the system pressure maintenance and pressure relief, as they can using the appropriate valves to switch between the two tanks. When powdered solid material is moved from the first intermediate container to the second, the pressure maintenance system with regulatory impacts supports the second intermediate tank overpressure required for the smooth release of her mixture of fluid and solid mA is Arial. In the process, the intermediate pneumatic powdered solid material from the first intermediate tank to the second system pressure maintenance using regulatory impact supports the required excess pressure in the first intermediate tank and the pressure relief system through regulatory impacts allows removal of excess gas from the second intermediate container and, for example, discharge through the filter into the atmosphere. After completing intermediate pneumatic conveying of powdered solid material from the first intermediate tank at a second pressure relief system is activated pressure relief of the first intermediate containers.

Supply system siraudeau gas in the preferred embodiment, has three parallel pipeline section, each fitted with shut-off valve and the Laval nozzle. While the Laval nozzle in the first pipeline section should skip one-seventh, the Laval nozzle in the second pipeline section should skip two sevenths, and the Laval nozzle in the third pipeline section should skip four-sevenths of the maximum required flow rate. Thus consumption siraudeau gas can be discretely increase in six equal increments from 1/7 to 7/7 from the maximum flow rate. It provides kV is synepherine flow regulation siraudeau gas without having to use a complex system of measuring its flow rate. In such a gas supply system, it is preferable to provide one - fourth of the pipeline section running off valve and the Laval nozzle and which is made in the form of a pipe feeding the purge gas.

Device for fluidized provided in the intermediate system of pneumatic transport, in the preferred embodiment, has a camera fluidized with the gas supply system. This gas supply system preferably includes two parallel pipeline section, each fitted with shut-off valve and the Laval nozzle and one of which is executed in the form of a pipe feeding the purge gas.

Brief description of drawing

Below the invention is described in more detail on the example of one of the variants of its implementation with reference to the attached drawing, which schematically illustrates the proposed invention is a device for the continuous supply of powdered solid material from the supply tank to the pneumatic pipeline.

The preferred embodiment of the invention

Attached to the description of the drawing the position of the 10 marked the supply tank with the stock loaded in her powdered solid material, for example coal dust. This powdered solid material is required to continuously inject at least in the Dean pneumatic transport pipe 12, 12'.

Used for this purpose, the device comprises a first intermediate tank 14 and the second intermediate tank 16, which are installed next to each other on the same level under a consumable container 10.

The first intermediate tank 14 is in the form of a rotary container with the top gated by gate 18 through which it is filled powdered solid material from the supply tank 10, and the discharge cone 19 and the lower gateway shutter 20, through which it is emptied. In a preferred embodiment, the upper rotary valve 18 comprises a flat valve 22 as a shut-off body, retaining the solid material in the supply tank 10, and of the downstream ball valve 24, which provides almost complete ageing floodgates. The lower rotary shutter 20 also consists of providing virtually complete his ageing ball valve. Position 28 in the drawing, the first weighing device, allowing to determine the fill level of the first intermediate tank 14.

The second intermediate tank 16 in the form of injection capacity, top loading (input) a hole 30 through which it is filled powdered solid material from the first intermediate tank 14, and the lower discharge (output) hole is a tie 32. Position 34 in the drawing, the second weighing device, allowing to determine the fill level of the second intermediate tank 16.

The General position 38 in the drawing, the device for fluidization, through which the exhaust valve 40 is connected to the lower outlet opening 32 of the second intermediate tank 16. This device 38 for fluidization is known as such, the camera 42 of fluidization system 44 of the gas supply. The gas supply system includes preferably four parallel connected shut-off valve 461, 462, 463, 464, each of which is provided on the Laval nozzle 481, 482, 483, 484to restrict gas flow.

The General position 50 in the drawing, the intermediate system of pneumatic transport, which connects the rotary shutter 20, the first intermediate tank 14 with the upper inlet 30 of the second intermediate tank 16 and in which the powdered solid material is removed from the first intermediate tank 14 to the second intermediate tank 16. This system 50 intermediate pneumatic contains also known as such, the camera 52 of fluidization system 54 of the gas supply. This gas supply system preferably contains two parallel-connected shut-off valve 561, 562/sub> , each of which is provided on the Laval nozzle 581, 582to restrict gas flow.

In the discharge cone 19 of the first intermediate tank 14 posted by additional system 60 of the gas supply. This gas supply system also includes a shut-off valve 62 and the Laval nozzle 64.

For both intermediate tanks 14 and 16 are provided with a common system maintenance, respectively, of pressure relief. The pressure maintenance system contains common gas supplying pipe 70 with the installed control valve 72, and the first connection 73 to the first intermediate tank 14 with the installed first shut-off valve 74 and the second connection 75 to the second intermediate tank 16 with the installed second shut-off valve 76. The pressure relief system contains General exhaust (discharge) pipe 80 with the installed control valve 82, and the first connection 83 to the first intermediate tank 14 with the installed first shut-off valve 84 and the second connection 85 to the second intermediate tank 16 with the installed second shut-off valve 86.

Position 90 in the drawing, a controller which controls the operation of both valves - control valve 72 maintenance system pressure and control valve 82 system pressure relief. To e the th controller 90 is connected to the first sensor 92 pressure, measuring the pressure in the first intermediate tank 14, and the second sensor 94 pressure, measuring the pressure in the second intermediate tank 16.

Below is described the principle of operation is schematically shown in the drawing device.

The first intermediate tank 14 is designed for pneumatic pass through the gateway of the transported material from the supply tank 10 to the second intermediate tank 16. This process is cyclically repeated bypass starts with filling the first intermediate tank 14 powdered solid material from the supply tank 10. To do this, first open the ball valve 24, and then the flat valve 22. The material to be conveyed under its own gravity begins to paricipates from feed tank 10 in the first intermediate tank 14. After filling the first intermediate tank 14 powdered solid material to a maximum level, as determined by the weighing device 28, a flat valve 22, and then the ball valve 24 is closed. Simultaneously closes were up to this point in the open position of the shut-off valve 84 mounted in accession 83 system pressure relief. By opening shut-off valve 62 in the first intermediate vessel 14 is pressurized. The flow rate of flowing gas is limited to the ri that the Laval nozzle 64. Shut-off valve 62 closes again at the moment when the sensor 92 pressure registers the pressure in the first intermediate capacity required for injection of powdered solid material values.

After a decrease in powdered solid material in the second intermediate tank 16 to the minimum activated system 50 intermediate pneumatic transport. To this end, first open the shut-off valve 561system 54 of the feed gas, and then the lower rotary shutter 20, the first intermediate tank 14. In the chamber 52 of fluidization fluidizing gas is mixed with the stream of solid material. The flow of fluidizing gas is limited while the Laval nozzle 581. The resulting mixture of fluid (fluidizing gas) and solid material moves through the system 50 of the intermediate pneumatic transport to the upper feed opening 30 of the second intermediate tank 16. During this interim move of the mixture of fluid and solid material, the pressure in the first intermediate tank is maintained at a constant level control valve 72 system pressure maintenance. When this shut-off valve 76 is closed and the shut-off valve 74 is open, and the controller 90 controls the operation of the control valve 72 system pressure maintenance function measured by the first sensor Cawley values.

After a decrease in powdered solid material in the first intermediate tank 14 to the minimum of the lower rotary shutter 20 is closed. Then by opening the shut-off valve 562used to purge occurs purge system 50 intermediate pneumatic transport. The purge gas flow rate is limited while the Laval nozzle 582.

Upon completion of the purge system 50 intermediate pneumatic shut-off valves 561, 562closed. At the same time, the control valve 72 maintenance system pressure switches for gas supply to the second intermediate tank 16. Such switching occurs as a result of closing the shutoff valve 74 and the opening of the shut-off valve 76. Regulating the valve 82 system reset pressure switches to the first intermediate tank 14. This switching occurs as a result of closing the shutoff valve 86 and the opening of the shut-off valve 84. Then from the first intermediate tank 14 by opening the valve 82 system pressure relief, you can reset the pressure. The degree of opening of the control valve 82 is adjusted depending on the size of the residual pressure (detected by sensor 92) in the first intermediate tank 14 so that the gas flow in a wide range of values of pressure OS which was evalca approximately constant. After discharge pressure of the first intermediate tank 14 it is weighed and the entire above described cycle is repeated.

From the second intermediate tank 16 powdered solid material is continuously fed in at least one of the two pneumatic transport pipes 12, 12'. To do this open the exhaust valve 40 poured from the second intermediate capacity solid material is first mixed in the chamber 42 of fluidization with the carrier gas. The carrier gas is fed into the chamber 42 of fluidization of the system 44 of the gas supply. However, depending on the need for pneumatic transport of the flow of carrier gas open one, two or three shut-off valve 461, 462, 463. The flow of gas is limited by the Laval nozzles 481, 482, 483. They have such dimensions that the Laval nozzle 481skips one-seventh (1/7), the nozzle 482Laval skips two sevenths (2/7), and the Laval nozzle 483skips four-sevenths (4/7) of the maximum required flow rate. Thereby the flow rate of fluidizing gas can be discretely increase in six equal increments from 1/7 to 7/7 from the maximum flow rate. It provides a quasi-continuous regulation of the flow of fluidizing gas without having to use a complex system of measuring its consumption.

When the stop process on tamily other reasons, or when the plugging of injection pipeline it can blow out. For this purpose it is necessary to close the shutoff valve 461, 462, 463and open the shutoff valve 464. The purge gas flow rate is determined by the size of Laval nozzle 484.

In the process of discharge of the powder of the solid material in the pneumatic transport pipe pressure in the second intermediate tank 16 is maintained at a constant level. With the invention, the device can operate in two different modes depending on how involved does the system 50 intermediate pneumatic or not.

When idle the system 50 intermediate pneumatic control valve 72 maintenance system pressure is switched to the second intermediate tank 16, i.e. the shut-off valve 74 is closed and the shut-off valve 76 is open. Using automatic control, in which the sensor 94 and pressure regulating valve 72 maintenance system pressure, the pressure in the second intermediate tank 16 is maintained at a constant level. As soon as the weighing device 34 will register a decrease in the level of powdered solid material in the second intermediate tank 16 to a minimum, enable the system 50 of the intermediate pneumatic transport. Then switch shut-off valve 76 to the closed position, and locking clap is and 74 - in open position the control valve 72 maintenance system pressure switches to the first intermediate tank 14.

When used as system 50 of the intermediate pneumatic second intermediate tank 16 receives a greater amount of solid material and carrier gas than is taken from it in the process of discharge of the powder of the solid material in the pneumatic transport pipe. In this case, the pressure in the second intermediate tank 16 is maintained at a constant level due to the controlled release of a certain amount of gas. With this purpose, the control valve 82 system reset pressure switches to the second intermediate tank 16, i.e. the shut-off valve 84 is closed and the shut-off valve 86 is opened. Using automatic control, in which the sensor 94 and pressure regulating valve 22 system pressure relief, pressure in the second intermediate tank 16 is maintained at a constant level. Upon completion of the filling process of the second intermediate tank 16 powdered solid material and purge system 50 intermediate pneumatic control valve 82 system pressure relief again switches to the first intermediate tank 14 (i.e. shut-off valve 84 is opened, and the shut-off valve 86 is closed), and adjust the second valve 72 maintenance system pressure again switches to the second intermediate tank 16 (i.e. shut-off valve 76 is opened, and the shut-off valve 74 is closed), and proposed in the invention, the device starts to work again in the first mode.

1. Device for the continuous supply of powdered solid material from the feed tank (10) in the pneumatic transport pipe (12, 12'), containing the first intermediate tank (14), which is made in the form of a rotary container with top gateway shutter (18), providing the possibility of adding powdered solid material from the feed tank (10), and with the lower gateway shutter (20)to enable emptying, and the second intermediate tank (16), which is made in the form of a pressure tank with top inlet (30) for adding powdered solid material from the first intermediate tank (14) and a lower outlet (32) for the continuous feed of powdered solid material in the pneumatic transport pipe (12, 12'), characterized in that the first and second intermediate tank (14, 16) are installed next to each other and between the lower gateway shutter (20) of the first intermediate tank (14) and the upper inlet (30) of the second intermediate tank (16) is the system (50) intermediate pneumatic device for fluidization, providing the opportunity powdered TV is Gogo material from the first intermediate tank (14) the second intermediate tank (16).

2. The device according to claim 1, containing a General system(70, 72, 73, 74, 75, 76) pressure maintenance in both intermediate containers (14, 16).

3. The device according to claim 2, in which the total pressure maintenance system contains General gas-feeding pipe (70), a fixed control valve (72), the first connection (73) to the first intermediate tank (14) with the installed first shut-off valve (74) and the second connection (75) from the second intermediate container (16) with the installed second shut-off valve (76).

4. The device according to claim 3, containing a common pressure relief system containing the common exhaust pipe line (80), fixed regulating valve (82), the first connection (83) to the first intermediate tank (14) with the installed first shut-off valve (84) and the second accession (85) to the second intermediate tank (16) with the installed second shut-off valve (86).

5. The device according to claim 4, containing the controller (90)for controlling the operation of the regulating valve for maintaining a pressure regulating valve for pressure relief.

6. Device according to one of claims 1 to 5, in which the device (38) for fluidization is connected to the lower outlet opening (32) of the second intermediate tank (16) and has a chamber (42) of fluidization system (44) of the gas supply.

7. The device according to claim 6, in which system the mA (44) gas supply has three parallel pipeline section, for each fitted with shut-off valve (461, 462, 463and the Laval nozzle (481, 482, 483), while the Laval nozzle (481on the first pipeline section skips one-seventh, the Laval nozzle (482in the second pipeline section skips two sevenths, and the Laval nozzle (483) on the third pipeline section skips four-sevenths of the maximum required flow rate.

8. The device according to claim 7, in which the gas supply system has a fourth pipeline section running off valve (464and the Laval nozzle (484and which is made in the form of a pipe feeding the purge gas.

9. Device according to one of claims 1 to 5, in which the device (38) for fluidization has a chamber (52) of fluidization system (54) feed gas containing two parallel pipeline section, each fitted with shut-off valve (561, 562and the Laval nozzle (581, 582and one of them is made in the form of a pipe feeding the purge gas.



 

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10 cl, 5 dwg

FIELD: pneumatic transport facilities.

SUBSTANCE: invention is designed for transportation of loose materials. Proposed plant for handling caking and lump powder materials has discharge device with ripper for breaking bridge formed in container, charger with bucket-wheel feeder for breaking lumps, reception of uniform dispensing, device for rubbing through and bringing material into aerated state in aerochamber combined with rubbing through device. According to invention, discharge device is essentially hydraulic cylinder on rod of which platform is secured with fitted on drive whose output shaft is connected with vertical shaft of ripper. Ripper is installed for lowering by means of hydraulic cylinder with cut-in drive and automatic movement upwards after reaching of limit switch in lower position with subsequent disconnection of ripper drive. Charger consists of cylindrical housing, upper cover, pneumovibrator with screen and aerobottom. Pneumovibrator of screen is brought out of housing behind its wall through flexible diaphragm flexible diaphragm. Aerobottom of charger is truncated cone lined from inner side with gas distributing needle-pierced rubber cloth and divided by means of pressure strip into two horizontal sections, each provided with union to feed compressed dried air. Upper cover is provided with charging hatch and branch pipe with filter to let out air into wet dust trap system. Rubbing through device consists of cylindrical housing with round holes in lower part and shaft passing in center of housing with elastic blades attached to cross-members to adjust distance from blades to wall of housing equipment with receiving hopper enclosing over perimeter part of housing with holes and assembled with said aerochamber for fluidizing said material getting into said pipeline.

EFFECT: provision of stable and unfailing operation of plant.

3 cl, 4 dwg

FIELD: material handling facilities; pneumatic transportation.

SUBSTANCE: according to invention, tightness of pneumatic transportation plant is checked before starting and periodically in process of operation by creating vacuum gauge pressure of at least 0.08 MPa in pipeline and air line by vacuum pump, and residual pressure not higher than 0.02 MPa in unloader with subsequent revealing degree of air suction after closing of evacuation line. Reduction of vacuum gauge pressure in 10 min in pipeline should not exceed 0.005 MPa and in air line, not exceed 0.02 Mpa and rise of residual pressure in unloader should not exceed 0.0025 MPa in 5 min.

EFFECT: provision of reliable tightness of system and drying the system before starting and in process of operation.

3 cl, 1 tbl, 4 dwg

FIELD: transportation of loose materials.

SUBSTANCE: proposed feeder contains rectangular section confuser-diffuser housing with feed port in zone of mating of its confuser and diffuser parts. Charging funnel with control gate arranged in lower part of funnel is placed over feed port. Hosuing is connected by its confuser and diffuser parts with confuser and diffuser which are connected, accordingly, with air duct and material duct of plant. Louver grating is arranged in housing over its entire width under feed port in diffuser part, louver slats being tilted in direction of transportation of material. Turnable valve is installed for turning on end part of louver grating over entire width of housing.

EFFECT: reduced losses of air pressure for accelerating particles of material to be transported after its delivery into feeder, reduced specific power losses of pneumotransport plant.

2 cl, 1 dwg

FIELD: metallurgy, chemical construction and other industries.

SUBSTANCE: invention relates to pneumatic transport and it can be used in handling of hot and cold loose materials. Proposed device for pneumatic transportation of loose materials contains air line with holes consisting of separate links laid inside transport pipeline. Pressure and thrust members for air line are hermetically mounted in holes in bottom of transport pipeline and are arranged in its inner space. End of air line provided with shutter. Initial section of each link is made in form of outer conical surface, and end is furnished with bell-type branch pipe with inner conical surface. Conical surfaces widen in direction of air flow. Longitudinal slots forming holes for air line are made on conical surface of each link.

EFFECT: reduced abrasive wear and power consumption at transportation of loose material, improved reliability of device, enlarged sphere of application.

4 cl, 7 dwg

FIELD: transport.

SUBSTANCE: invention refers to the area of pneumatic transport of powdered hard material. Plant is designed for the continuous feed of powder hard material from the service tank (10) into the pneumatic transport pipeline (12, 12'). This plant contains the first (14) and the second (16) intermediate tanks installed near each other. The first intermediate tank (14) is built in the form of sluice tank with the upper sluice valve (18) and the lower sluice valve (20). The second intermediate tank (16) is built in the form of injection tank. Between the lower sluice valve (20) of the first intermediate tank (14) and the upper inlet (30) of the second intermediate tank (16) the system (50) of intermediate pneumatic transport is located to transmit the powdered hard material from the first intermediate tank (14) into the second intermediate tank (16). System (50) is provided with the device for material fluidisation.

EFFECT: provides simplification of construction.

9 cl, 1 dwg

FIELD: machine building.

SUBSTANCE: in the device for pneumatic transport of powder-like medium, containing source of air excess pressure communicated to receiver, sectional transmission pipe-line with feed pipe of air to its butt, distributive pipe, pipelines for air, electromagnetic valve with control pulse generator, for each bin of ash-catcher there are installed inlet branch pipe with located vertically saddle at outlet port, choke with air feed pipe to choke, located in casing. Bottom cavity of casing is communicated through the reducing sleeve with located horizontally saddle at outlet port, cavity of the second casing - to sectional transport pipeline. In cavity of the second casing there are located the second choke with feed pipe of air to choke. Each pipeline for air by its outlet end is communicated to inlet ends of feed pipes of air to chokes of two casings of each section, and by inlet - to distributional tube. At each choke, at surface adjacent to pipe of air feed it is fixed pressure tube with ability of enveloping by external surface of outlet end of air feed tube to choke at its mixing.

EFFECT: reliability enhancement.

1 dwg

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