Heat exchanger reactor
FIELD: power industry.
SUBSTANCE: heat exchanger reactor includes a shell (1) in the form of a flattened cone with bottoms (2) and (3), heat carrier input and output pipes (4) and (5) for the tube space, and heat carrier input and output pipes (6) and (7) for the shell space. One bottom, namely bottom (2), features a concavity (8) (if seen from below the bottom) in the centre. The shell (1) features a heat effect compensator (9). A thin-wall hollow cone (10) for flow distribution through small (11) and large (12) orifices is mounted in one bottom, namely bottom (3).
EFFECT: enhanced efficiency of heat exchanger due to even distribution of flow speed through the whole volume, and reduced dimensions.
6 cl, 3 dwg
The invention relates to the field of heat and can be used in power, petrochemical and other industries, in particular in processes with large thermal effects.
Known input device for tangentially fed into the apparatus a fluid medium, where it is made in the form of a cone. The diffuser reduces the input speed of the fluid. However, it is made by bending, so the environment becomes rotational movement inside the apparatus in the form of a vortex flow. When this vortex flow having a greater velocity in the peripheral region of the device, in the Central part of the slow, especially the vertical component of velocity. Therefore, in order to maximize uniform flow distribution inside the device, there is a deflecting element. It is located downstream from the diffuser and rejects the vortex flow in the direction towards the Central part of the apparatus. The result is a fairly good distribution of the flow inside the apparatus (Patent RU 2445997, B01D 3/30, B04C 5/04 publ. 27.03.2012).
This input device is a large internal volume of the apparatus, it is difficult in design, but also increases the overall weight of the apparatus and the flow resistance.
Known reactor, with own mixing zone fast heat sink. The mixing apparatus consists of VI is Reva camera, rough distribution scheme and the actual distribution device. In a vortex chamber serves the reacting liquid and the cooling liquid, where they are fully mixed in the vortex flow. The mixture of two liquids out of the vortex chamber in the rough distribution scheme, where the mixture is distributed radially through cameras located in the form of rays emanating from the center. Then the mixture through razbryzgivatelja plate supplied to the plate with bubble caps. After that, the mixture is fed to the catalyst layer. Offers other options for the location of elements of the mixing and distribution device (Patent US 006098965A, publ. 8.08.2000 F280D 21/00, B01F 3/00).
The reactor with the proposed apparatus the mixing zone fast heat sink can be used only for certain values of the costs of operating environments, because the swirl chamber at high costs may have an unacceptable resistance, and cap plates would cease to work. In the rough distribution system in long chambers of the radial distribution, and the reflectors can occur in the reverse process, namely some separation, especially gas-liquid and liquid-vapor mixtures. The effectiveness of the mixing and distribution is not installed, especially in case of simultaneous use of the vortex ka is a career and tarelchatyj devices and of coarse the distribution system. The mixing apparatus generally has a high intensity and low versatility.
Known shell-and-tube apparatus used as a reactor for carrying out heterogeneous catalytic exothermic reactions. The flow of the reaction mixture enters the tube space from the top through the tangential inlet located at the top of the top plate. Reaction mass is passing through the tube with the catalyst exits through the bottom tangentially located inlet. For removal of the heat of reaction annulus serves the coolant. It comes from the bottom through a tangential entry and special distribution ring located inside at the bottom of the reactor. The output of the coolant going through the top nozzle. The design of the top output device similar design input. Thus, in the annular space reaches a fairly uniform washing external surfaces of the pipes (Kirk, Otmer, Encylopedia of Chemical Technology, New York, 1965).
The disadvantage of the reactor is uneven reaction mixture in the tube. Tangential entry mainly causes the circular motion of the flow in the upper plate, decorated internal configuration of the bottom and the surface of the tube. Medium dense part of the pot is ka bad scatters and, sliding on the tube grid covers only a certain part of the tubes. In another part of the tubes are received lots of flow, with lower densities and velocities. The flow is slightly delayed in the bottom. Different linear velocity in the pipes is especially noticeable at high mass and volumetric speeds.
Closest to the claimed invention, the exchanger-reactor, which includes a housing in the form of a truncated cone with a concave in the direction of its vertical axis surface with the heads, the nozzles of the input and output of the heat transfer pipe and the annular space. Inside the body is a tube bundle, which consists of at least two rows of conical tubes, fixed ends in the holes in the grates on concentric circles. The pipes are tilted simultaneously in two directions: with an inclination to the vertical axis of the housing and with the additional tilt, executed by displacement of the ends in the circumferential direction, that is, the arcs of circles into tube sheets. These slopes are opposite in adjacent rows of tubes. When this inclination is made in the range of 0.5 to 50.0 degrees from the vertical plane passing through the vertical axis of the housing. In this implementation there is no need to amplify the input parameters of the heat carrier, which saves heat elektrichesky energy. (Patent RU 2451889, IPC F28D 7/08, publ. 25. 05. 2012).
The disadvantage of this heat exchanger-reactor according to the invention is the lack of uniformity of feed of the coolant in the pipe and the annular space. Part received in the bottom of the flux reflected from not occupied by the pipe surface is directed to the middle of the stream, where the density is higher. A small part of the fond medium dense flow, and a large part reflected from the stream, and keeping a curvilinear trajectory, hitting the walls of the bottom. As a result, the vortices is determined by the size of the bottoms, on the route: the entrance of the coolant pipe lattice - medium dense part of the flow - wall - pipe grate. As shown by the mathematical model, the speed in the middle of the stream and secondary tubes of the tube bundle above almost twice as compared with the velocity in the peripheral areas above the tube sheet and the peripheral tubes. In the case of applying multi-component mixtures can occur some separation on the molecular mass, which is unacceptable when using an exchanger-reactor as chemical reactors. The complexity of manufacturing the case, especially for heat exchanger-reactor of large unit capacity is also a disadvantage. The absence of the compensator limits its use for processes with large temperature different is due to (Δt).
The technical result, which directed the present invention is to improve the uniformity and intensity of heat transfer in all parts of the exchanger-reactor, the efficiency of the processes with large thermal effects, as well as to improve reliability and efficiency in operation.
The technical result is achieved by the fact that in the exchanger-reactor, comprising a housing in the shape of a truncated cone with a concave surface to the bottoms, the nozzles of the input and output of the heat transfer pipe and the annular space, the tube, the holes are fixed in concentric circles inclined to the axis, at least two rows of tubes, made in the form of truncated cones, in addition, the pipe will also inclined offset for arcs placing them all on one of the tube sheets, and in the same row of tubes inclined offset by arcs of circles, placing them all on one of the tube sheets in the opposite direction relative tilt offset in the adjacent row or in adjacent rows, and in the Central tube placed thermal and other sensors, the new is that in the center of the bottom, on the side of the coolant in the tube space, has a concavity directed wide end towards the tube d is etki, and at the bottom, located on the outlet side of the coolant from the tube space, fixed hollow cone with holes located against the top of the thread around the Central tube has a zone formed by the first row of inclined pipes, starting from the Central pipe.
Concavity is made and oriented so that the density reflected from the concavity of the flow is evenly distributed over the surface of the tube.
Concavity are removable along with tangential connection of the input fluid.
Connections input and output of the heat transfer pipe and the annular spaces are located tangentially.
The body of the exchanger-reactor consists of two parts connected by a thermal compensator, and the division of the body into two parts and join them with a thermal compensator implemented at the level of 0.58-0.65 height, measured from the big tube.
Figure 1 presents a General view of the exchanger-reactor, figure 2 - its schematic representation, figure 3 is a section view along a-a from figure 1.
The exchanger-reactor (1) includes a housing 1 in the form of a truncated cone with the bottoms 2 and 3, the nozzles 4 and 5 input and output coolant pipe space, the nozzles 6 and 7 of the input and output fluid annulus. On the Central part of one of the bottoms, in particular of the bottom 2, there is a concavity 8 (which if you look inside the bottom). The housing 1 is equipped with a compensator 9 thermal influences. In one of the bottoms, in particular in the bottom 3 (2), fixed thin-walled hollow cone 10 to the dispenser flows with 11 small and large 12 holes. The housing 1 with two ends of the sealed tube sheets 13 and 14, which is fixed (Fig 3 view a-a) of the Central pipe 15 and inclined pipes 16 (grating 14 figure 3 not shown). Around the Central tube 15 is formed free from the details of area 17, bounded by the first row of tubes 16, counting from the Central axis of the apparatus. When the heating medium supply pipe space below (figure 2) through the pipe 5, the design of the bottom 3 should be similar to the structure of the bottom 2, and Vice versa, the design of the bottom 2 is similar to the structure of the bottom 3.
The exchanger-reactor operates as follows.
The coolant pipe space enters tangentially through pipe 4 into the concavity 8, where the flow, changing the direction, shape, and divided into many small streams flowing pipes 15 and 16 of the tube bundle. In the case of countercurrent, concurrent with the coolant pipe space, the second fluid enters the annulus through a tangential entry 7, where the heat transfer through the walls of the pipes 15 and 16 between the two fluids. The output fluid from the annulus through tangentially location the config pipe 6. The coolant pipe space after exiting the pipes 15 and 16 through the flow distributor 10 and tangentially located inlet 5 is sent out.
The design and orientation of the concavity 8 is designed so that the reflected and scattered flux is directed in the direction of the focus concavity, which is far enough to the cross-sectional area of its beam was at the level of the tube 13, no more and no less than its square. Since, due to the small distances, the beam reflected flux undergoes only extending to the surface of the tube, it has the same density and velocity at all points in contact with the tube sheet. Consequently, the density and velocity of the beam flow is also the same in the pipes 15 and 16. In the case of the feed tube space of multicomponent mixtures in contact with the wall of the concavity 8 is an additional mixing. Because the distance inside of the bottom 2 is negligible, the redistribution of the components does not occur, the beam flux in a very short period of time reaches the pipes 15 and 16.
However, when the output flows from the pipes 15 and 16 speeds are somewhat different. When the execution of the outlet pipe 5 in the middle of the bottom plate 3, coming out of the pipes 15 and 16 threads, located closer to the center, against which there is an outlet opening, the spytyvayut less resistance, than outflows from the periphery of the pipe 16. Therefore, the speed of the Central threads is greater than the peripheral speed. Additional site in the form of a hollow thin-walled cone 10 with holes 11 and 12 of different diameters, increasing in the direction from the vertex to the base of the cone, equalize the difference in resistance. Flows through the small holes 11 located closer to the top of the cone, have more resistance than air flows through large openings 12 located closer to the base of the cone 10. Flows through the peripheral pipe 16 passing through the large holes 12, are experiencing some resistance, but to a lesser extent than passing through the small holes 11. All threads in the approach into the outlet pipe 5 have almost the same speed. The alignment of the flow rates inside the bottom 3 affects the flow velocity inside the pipes 15 and 16.
Heat exchangers-reactors designed to operate under high temperature, equipped with a thermal compensator 9. It is located at the level of 0.58-0.65 height from the large tube 14 and includes the upper and lower halves of the housing 1.
According to the present invention, in the centre of the annulus around the Central pipe 15 is a memory area 17 (3), formed the first is t the Central axis near the inclined pipe 16. Its volume is sufficient for part of the incoming flow was more directed in the radial direction.
When performing input and output nozzles in the annular space tangentially 6 and 7, the initial impact on the pipes 15 and 16 of the incoming coolant is happening on a wider area than classic type, i.e. perpendicular to the tangent plane on the surface of the housing 1. Local overheating or cooling less.
Usually, when a tangential entry, most of the flow goes around the circle, then as part of the flow path toward the center and up, less. Therefore, at various points in the annulus velocities will be different. The non-uniformity of velocity causes non-uniformity of heat transfer in tube and pipe spaces. According to the invention, when the input fluid in the annulus from the bottom through the pipe 5 from the side of the large diameter of the housing 1 and the pipes 15 and 16, tangentially component of velocity of the fluid in the upward movement decreases because of the increased resistance caused by a gradual narrowing of the housing 1 and the space 17 between the pipe 16. At the same time, by decreasing tangential velocity and due to the radial aspirations of the flow in area 17, where there is less resistance, grows vertically component. The result is - speed equalized much earlier than in the prototype, in the lower area of the annulus. When the input carrier top side small diameter through the pipe 6 tangentially component of the flow velocity as it passes downwards decreases because of the expansion of the housing 1, the space between the rows of tubes 16 and zone 17. At the same time for the same reasons, reduced vertical component of velocity. In the result the velocity components in the annular space remain in the same proportions in which they were when the coolant flows from the bottom up (When you enter from the top and bottom of the gravitational component of the flow velocity was not taken into account).
Thus, in the proposed heat exchanger-the heat sink is achieved a uniform velocity distribution throughout its volume, thus avoiding local overheating and cooling, which increases its efficiency and thus reduce its overall dimensions. In addition, the use of split case design and compensator, allows to increase the versatility of the exchanger-reactor, i.e. to use it in the processes under more severe conditions with high reliability and efficiency.
1. The exchanger-reactor, comprising a housing in the shape of a truncated cone with a concave surface to the bottoms, pipe input and output those who of lonavala pipe and annular spaces, tube, the holes are fixed in concentric circles inclined to the axis, at least two rows of tubes, made in the form of truncated cones, in addition, the pipe will also inclined offset for arcs placing them all on one of the tube sheets, and in the same row of tubes inclined offset by arcs of circles, placing them all on one of the tube sheets in the opposite direction relative tilt offset in the adjacent row or in adjacent rows, and in the Central tube placed thermal and other sensors, characterized in that the center of the bottom, which on the side of the coolant in the tube space, has a concavity directed wide end of a side tube and bottom, located on the outlet side of the coolant from the tube space, fixed hollow cone with holes located against the top of the thread around the Central tube has a zone formed by the first row of inclined pipes, starting from the Central pipe.
2. The exchanger-reactor according to claim 1, characterized in that the concavity is made and oriented so that the density reflected from the concavity of the flow is evenly distributed over the surface of the tube.
3. The exchanger-reactor according to claim 2, characterized in that the concavity is made removable C the one with the connection of the input fluid.
4. The exchanger-reactor according to claim 1, characterized in that the nozzles of the input and output of the heat transfer pipe and the annular spaces are located tangentially.
5. The exchanger-reactor according to claim 1, characterized in that the housing consists of two parts connected by a thermal expansion joint.
6. The exchanger-reactor according to claim 5, characterized in that the separation of the body into two parts and join them with a thermal expansion joint is made at the level of 0.58-0.65 height, measured from the large tube.
SUBSTANCE: heat exchanger comprising a bundle of tubes, placed inside a body, made with an elastic end structure put into compressed condition to form a plug, at least partially, on opposite sides of the heat exchange chamber. The specified elastic end structure comprises one or more edge segments stretching between the inner wall of the body and the outer border of the tube bundle. The edge segment includes a combination of materials, having different compression characteristics, providing for reinforced support to edge segments.
EFFECT: improved sealing properties of a heat exchanger.
12 cl, 5 dwg
SUBSTANCE: invention refers to heat engineering and can be used at manufacture of heat exchangers. Heat exchanger with extruded multichamber headers is proposed, which contains at least two plates, each of which forms at least one channel providing the communication as to the flow. Heat exchanger contains the first and the second headers, each of which is equipped at least with two chambers. Each plate is attached to chamber of the first header and to chamber of the second header, and each chamber has internal and external walls. External wall has the surface facing outwards in relation to chambers of headers. Besides, in external wall there is a through hole forming an outlet slot allowing to implement the communication as to flow between chambers.
EFFECT: simplifying the manufacture of multichamber header of heat exchanger.
11 cl, 13 dwg
FIELD: machine building.
SUBSTANCE: radiator consists of first cooling device connected with lower end section of radiator. The first cooling device has a lower chamber. The lower chamber consists of a front wall, back wall, of the first and second side walls at distance one from another, of a lower wall and lower section. An outlet branch of the radiator is connected with the lower section. An active cooling zone is located in the lower chamber. A partition is connected with the lower chamber and is positioned above the active cooling zone. An orifice is made in the partition nearer to one from the first or second walls, than to the other from the said walls. Here is disclosed the working machine using such radiator.
EFFECT: improved heat exchange.
18 cl, 5 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to power plant engineering and may be used in production of air cooling apparatus section chambers. Tube plate with heat transfer perforations, top, bottom and lateral walls welded together to make housing are produced. Note here that said top, bottom and lateral wall are furnished with ledge that makes flange on housing outer side surface on rear wall side. Tube plate ends fitted in perforations, steel membrane is fitted on housing face rear wall. Said membrane is 2-3 mm-thick. Said membrane is welded along perimeter to make closed chamber with said housing. Rear wall is arranged in contact with membrane and screwed to housing. Screws are fitted in threaded holes made in housing rear wall and flange.
EFFECT: ease of fabrication and servicing, higher reliability and longer life.
2 cl, 1 dwg
FIELD: power engineering.
SUBSTANCE: plates are arranged in parallel with the main plane of length and include several plates of heat exchanger and a strengthening plate. Plates of the heat exchanger are arranged next to each other and form a packet of plates with the first plate-to-plate gaps and the second plate-to-plate gaps. Each plate of the heat exchanger has four through holes, which form channels though a packet of plates. The plates of the heat exchanger comprise the extreme plate of the heat exchanger at one side of the packet of plates and the extreme plate of the heat exchanger at the opposite side of the packet of plates. Two of the specified plate-to-plate gaps in the packet of plates form an appropriate extreme plate-to-plate gap at the appropriate side of the packet of plates, which are limited in outside direction of one appropriate extreme plates of the heat exchanger. Strengthening plates are arranged outside one of the first plates of the heat exchanger. Strengthening plates have the main area, which passes in parallel to the plane of length and which comprises a strengthening pattern, which is arranged near two channels and comprises at least one groove passing in direction outside from the heat exchanger plates.
EFFECT: increased strength, simplified manufacturing.
17 cl, 11 dwg
FIELD: power engineering.
SUBSTANCE: plant (1) for realisation of heat exchange between the first and second coolants comprises central header (14), communicating either with inlet (4) or with outlet (6) of the first coolant; circular header (16) installed around central header (14), communicating accordingly either with outlet (6) or with inlet (4) of the first coolant, multiple heat exchangers (12), installed in radial direction between central header (14) and circular header (16); multiple input axial headers (18), communicating with inlet (8) of the second coolant, and multiple output axial headers communicating with outlet (10) of the second coolant, at that inlet and outlet axial headers (18) are installed in circumferential direction between heat exchangers (12). According to invention, plant comprises input chamber (22), arranged at the first axial side of heat exchangers (12) and setting communication between inlet or outlets (8) of the second coolant and at least several inlet axial headers (18).
EFFECT: plant reliability improvement.
25 cl, 13 dwg
FIELD: engines and pumps.
SUBSTANCE: heat exchanger, namely for cooling of exhaust gases at least with one housing, at least with one first flow channel for the first medium, at least with one second flow channel for the second medium, at least with one bottom which is connected to the housing; at that, bottom has at least one compensation element.
EFFECT: improving heat exchanger design.
40 cl, 14 dwg
FIELD: heating systems.
SUBSTANCE: in heat exchanger containing tubes and at least one header including at least one tube sheet, tube sheet includes pass flanges in which tubes are installed; each pass flange of tube sheet is enveloped with side surface passing along perimetre and adjoined to pass flange at blunt angle; at that, edges of side surface change into pass flange on one side at blunt angle, and on the other side, they change also at blunt angle into upward bent end section of tube sheet, thus forming S-shaped section of tube sheet; at that, side surface of two adjacent pass flanges border on each other, thus forming a chute.
EFFECT: decreasing mechanical loads without additional material consumption.
10 cl, 5 dwg
FIELD: constructional engineering, pipelines.
SUBSTANCE: methods and devices for channel lead-in of two fluids within multichannel monolithic structure (in monolith), their distribution and lead-out are proposed, where channel apertures being scattered all over the sectional area of the said structure. The said device contains collector head, either monolithic assembly or monolithic complete set, or assembly battery or complete sets, or monolithic block. Moreover, invention features method and reactor for mass- and/or heat exchange between two fluids, the said fluids being distributed through one or more collector heads and assemblies or complete sets, or assembly batteries or complete sets, or blocks.
EFFECT: simple and effective way to supply two various fluids to individual channels within multichannel monolithic structure without pipe application, as well as to connect some monoliths.
23 cl, 18 dwg
FIELD: technological processes.
SUBSTANCE: invention may be used in modernisation of horizontal machines of air cooling with heat exchanging sections that have welded undetachable chambers of rectangular shape. In the back wall chambers form at least one window for access to internal surface of pipes and their cleaning from the products that have been accumulated in the process of air cooling machines operation. The window has circular shape or shape of two circles joined to each other. Centre of circle coincides with axis of one of the openings of tubular grid. Centres of two circles coincide with axes of corresponding openings of tubular grid. Mentioned windows are covered with shields with sealing gaskets made of soft metal or soft nonmetal gasket material. Shields are fixed with the help of threaded plugs that are installed in the openings of back wall, which are closer to the shields.
EFFECT: increase of servicing convenience and machines reliability and increase of service life.
4 cl, 2 dwg
SUBSTANCE: valve assembly includes a valve that controls heat carrier flow rate in a heat exchange unit, which has primary circuit and secondary circuit, and a valve control device having a thermostatic element that is subject to influence of temperature in secondary circuit and that can be subject to a temperature and/or pressure variation device. A physical value obtained from valve (2) or heat exchange unit (22) has effect on the above device (14. 30) of temperature and/or pressure variation. Heat exchange unit is made in the form of water heater (22) having primary supply pipeline (25) and primary discharge pipeline (26) in primary circuit (23), as well as secondary supply pipeline (27) and secondary discharge pipeline (28) in secondary circuit (24). At that, water having increased temperature can be taken through secondary discharge pipeline (28). Temperature of primary supply pipeline (25) acts on device (14, 30) of temperature and/or pressure variation.
EFFECT: providing quick control of a valve at the appropriate control characteristic.
11 cl, 7 dwg
SUBSTANCE: recuperator includes a heated gas channel; an inlet pipeline; an outlet pipeline; as well as a once-through heating surface located in the heated gas channel and formed with a variety of the first single-row tube-header assemblies and a variety of the second single-row tube-header assemblies. Each of the variety of the first single-row tube-header assemblies including a variety of the first generator heat exchange tubes is parallel connected for passage of through fluid medium flow; as well as it includes an inlet header connected to the inlet pipeline. Each of the variety of the second single-row tube-header assemblies including the variety of the second heat exchange tubes is parallel connected for passage of through fluid medium flow entering from the corresponding first heat exchange tubes; as well as it includes an outlet header connected to the outlet pipeline. Each of the inlet headers is connected to the inlet pipeline via at least one corresponding tube of the variety of the first connecting tubes, and each of the outlet headers is connected to the outlet pipeline at least via one corresponding tube of the variety of the second connecting tubes.
EFFECT: quick heating and cooling and increase in the service life.
22 cl, 7 dwg
FIELD: power engineering.
SUBSTANCE: invention relates to a valve unit (1), comprising an inlet hole, a distributor and an outlet part having at least two outlet holes. The distributor comprises an inlet part (5), communicating with the specified inlet hole, and is made as capable of distributing fluid medium received from this inle thole, between at least two parallel flows of a heat exchanger (3). The valve unit (1) also comprises the first valve unit and the second valve unit installed as capable of displacement relative to each other so that mutual position of these valve elements determines the fluid medium flow passing from the inlet hole to each outlet hole of the outlet part. Besides, the valve unit (1) comprises a collector (2) forming an integral part of the valve unit (1). This collector (2) is made as capable of forming a zone of coupling with a heat exchanger (3), having at least two channels, at the same time this collector provides for such liquid communication, at which every outlet hole (7, 9) communicates with the channel of the heat exchanger (3), connected to the collector (2). The collector comprises at least one separating element that separates at least two sections of the collector, besides, each of these sections communicates with the distributor and the specified zone of coupling with the heat exchanger.
EFFECT: using the invention will make it possible to improve distribution of a coolant between heat exchanger channels.
13 cl, 11 dwg
SUBSTANCE: invention relates to the field of heat engineering, namely, to devices for heat recovery. Device for heat recovery contains a heat exchanger (3) located in the annular space (4) representing a part of the exhaust pipe (2) branching, for example, from a gas turbine or a diesel engine. Bypass pipe (6) for exhaust passes through the annular space (4), and distribution of the exhaust flow through the heat exchanger (3) and the bypass pipe (6) is regulated by the control valve (7). The control valve (7) is a butterfly valve (7) which is located in the exhaust pipe (2), adjacent to the heat exchanger (3), at that the said butterfly valve (7) has a fixed part (8) and the rotary part (9) equipped with openings (10, 12, 11, 13) closed or combined with each other. And both the fixed part (8) and the rotary part (9) have two oppositely directed conical parts (8a, 8b; 9a, 9b).
EFFECT: creation of a simple and inexpensive in manufacture device for heat recovery, weight reduction and simplification of regulation.
9 cl, 5 dwg
SUBSTANCE: invention relates to heat exchange units and may be used in heat-exchangers with primary and secondary circuits containing valve for coolant flow control. For this purpose, the heat exchanger consisting of housing with primary circuit between inlet connection and return pipe connection, and the secondary circuit between feed line connection and drain connection, includes valve for coolant flow control through the primary circuit and actuator with the expanding element being affected by the secondary circuit temperature. The valve and expanding element are located from the opposite sides of heat transfer surface, wherethrough the heat from the primary side is transferred to the secondary side. So, the heat-exchanger is represented with plate heat-exchanger. If temperature in the secondary circuit is changed, the expanding element is extended or compressed. The expanding element is connected with the valve which controls coolant flow rate in the primary circuit.
EFFECT: development of compact heat exchanger.
9 cl, 2 dwg
FIELD: mechanical engineering; heat exchanger equipment.
SUBSTANCE: invention relates to multistage heat exchange device containing primary and secondary circuits to provide heat exchange in which heat carrier passes in opposite directions. According to invention, primary circuit has at least two points of supply of heat carrier displaced relative to each other in direction of flow. Said device contains also system of valves interacting with temperature sensors and regulating heat carrier flow through primary circuit. Valve gear for each heat carrier supply point has separate valve.
EFFECT: provision of stable control of temperature at output of secondary circuit.
5 cl, 3 dwg
FIELD: power industry.
SUBSTANCE: heat exchanger of a double-pipe type includes two pipes located with a gap between them, one of which represents a toroid and the other one - a hollow Moebius band. Besides, longitudinal grooves can be made along Moebius band.
EFFECT: improving operating efficiency of a heat exchanger and reducing its dimensions.
2 cl, 2 dwg
SUBSTANCE: in a heat exchanger for an atomising drier, which includes a furnace, a drier housing with an atomiser, heat exchange tubes, according to the proposed invention, the heat exchanger is made in the form of a longitudinally finned tube and a finned tube connected to it, which is located in the furnace mixing chamber; at that, when the tube leaves the furnace, it passes into the shell and tube heat exchanger, the upper part of which consists of a housing in the form of three inclined tubes (15 degrees) leaving the tube, which are changed over to horizontal tubes, on each end of which one rosette is located, and each rosette includes seven tubes of the same diameter; at that, the housing walls are heat insulated with heat insulating material, for example Penofol, and the housing has three inlet and outlet branch pipes of the heated solution and a branch pipe for the tank emptying; at that, the unit is equipped with a pressure gauge, a safety valve and a heat carrier filling valve and has an excess pressure compensation line for heat carrier filling at the operating unit, which is equipped with the valve; besides, in the unit there is a return line of the circulating circuit and an expansion tank with a branch pipe, and the drier atomiser includes a hollow housing, which consists of a cylindrical part with external thread for connection to a nozzle of a liquid supplying distributing pipeline, a conical transient part and a cylindrical part with large size of diametrical section, and with internal threaded surface, and coaxially to the housing, in its lower part there fixed is a nozzle formed with cylindrical surface with external thread interacting with cylindrical part of the housing; at that, cylindrical surface of the nozzle is changed over to a conical surface and ends with an end blind partition wall perpendicular to the housing axis, with an orifice in its centre, which is axisymmetrical to the nozzle and consists of cylindrical and conical orifice holes connected in series; at that, larger diameter of conical hole is located on the blind partition wall of the nozzle; at that, the housing and the nozzle form three internal cylindrical chambers, which are coaxial to each other, and on the nozzle, on the side opposite to liquid supply, there is an additional row of orifices, which are formed at least with three pairs of mutually perpendicular vertical channels for passage of liquid and horizontal channels, which are crossed on a conical side surface of the nozzle and form outlet holes of each of the orifices; at that, pair channels are located at a right angle to each other in longitudinal planes of the housing, and conical side surface of the nozzle is made at angle to the top, which is equal to 90°.
EFFECT: increasing efficiency and economy of the heat exchanger operation and increasing production capacity of the drier.
FIELD: power industry.
SUBSTANCE: invention is designed for being used as single-block marine high-duty nuclear power plants with high unit power, which operate in varying load mode. Liquid-metal carrier is used in the proposed reactor. Besides, different arrangement patterns of heat transfer to liquid of the second circuit are located inside the reactor housing. The proposed device includes an integral active zone, a nuclear reaction control system and a protection system, steam generators and heat exchangers, heat carrier pumping pumps, and biological protection. At that, an electromagnetic pump is installed in the heat carrier circuit when heat is being transferred in steam generator; the above pump is coaxially attached to lower part of vertically located steam generator, and in the heat carrier circuit when heat carrier is being transferred in heat exchanger the provision is made for its connection to lower part of heat exchanger by means of a pipeline and location that is parallel to vertically located heat exchanger. Heat carrier flow is arranged in upward direction through active reactor zone.
EFFECT: optimisation of heat exchange in mode of varying loads and obtaining optimum weight and dimensional parameters of nuclear power plants as a whole, being the part of the ship.