CN112781405B - High-efficient compact heat exchanger of multichannel formula - Google Patents
High-efficient compact heat exchanger of multichannel formula Download PDFInfo
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- CN112781405B CN112781405B CN202110094298.7A CN202110094298A CN112781405B CN 112781405 B CN112781405 B CN 112781405B CN 202110094298 A CN202110094298 A CN 202110094298A CN 112781405 B CN112781405 B CN 112781405B
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- 238000009826 distribution Methods 0.000 claims abstract description 91
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 238000007789 sealing Methods 0.000 claims description 24
- 239000002609 medium Substances 0.000 description 29
- 239000007788 liquid Substances 0.000 description 9
- 239000012530 fluid Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000000926 separation method Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006160 differential media Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/0066—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention provides a multi-channel efficient compact heat exchanger, which comprises: the cylindrical body comprises a central cylinder and an outer cylinder which are sleeved with each other, and a first channel is arranged between the central cylinder and the outer cylinder; the heat exchange outer pipe is spirally arranged in the first channel; the heat exchange inner tube is arranged in the heat exchange outer tube in a penetrating mode, a second channel is formed between the heat exchange inner tube and the heat exchange outer tube, and a third channel is formed in the heat exchange inner tube; the second channel distribution pipe is arranged outside one end of the body, is communicated with the second channel and is provided with a second channel inlet; the second channel collecting pipe is arranged outside the other end of the body, is communicated with the second channel and is provided with a second channel outlet; the third channel distribution pipe is arranged outside the other end of the body, is communicated with the third channel and is provided with a third channel inlet; and the third channel collecting pipe is arranged outside one end of the body, is communicated with the third channel and is provided with a third channel outlet. The heat exchanger meets the heat exchange working condition of smaller temperature difference, has high heat exchange efficiency, compact structure and small occupied space, and can stably operate for a long time.
Description
Technical Field
The invention relates to the technical field of fluid medium heat exchange equipment in the fields of petroleum, air separation and chemical industry, in particular to a multi-channel efficient compact heat exchanger.
Background
Along with the continuous and rapid development of Chinese economy and the continuous increase of the industrialization process, the national requirements on energy conservation and environmental protection are higher and higher, and the process equipment used in the process industries such as petroleum, air separation, chemical engineering and the like needs to be replaced and upgraded intelligently, efficiently and compactly in urgent need to ensure that the energy consumption of the whole production process is lower and the emission is less.
The heat exchanger is used as important process equipment in the process industry, and the heat exchange efficiency, the occupied space, the long-period safe and reliable performance and the like of the heat exchanger directly influence the advanced level of the whole process technology.
Existing heat exchangers typically involve heat transfer only between two temperature-differential media, a cold medium and a hot medium. In order to meet the cooling or heating effect, the temperature difference between the two media is relatively large, and a long heat transfer tube pass is needed, so that the heat exchange efficiency of the equipment is low, the occupied space is large, and the heat exchange condition with small temperature difference cannot be met; in addition, the heat exchange pipeline of the existing heat exchanger is generally arranged in a straight line-360-degree arc bending-straight line manner, the heat exchange pipeline is easy to scale, the bending part is easy to cause pressure loss, and the long-period safe operation and the energy-saving operation are not facilitated.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a multi-channel efficient compact heat exchanger, which adopts sleeved spiral heat exchange tubes to exchange heat through various temperature difference media, meets the heat exchange working condition of smaller temperature difference, and has the advantages of high heat exchange efficiency, compact structure, small occupied space and long-term stable operation.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a multi-pass, high efficiency, compact heat exchanger comprising:
the device comprises a cylindrical body, a first connecting piece and a second connecting piece, wherein the cylindrical body comprises a central cylinder and an outer cylinder coaxially sleeved outside the central cylinder, a first channel is arranged between the central cylinder and the outer cylinder, one end of the cylindrical body is provided with a first channel inlet, and the other end of the cylindrical body is provided with a first channel outlet;
the heat exchange outer pipes are spirally arranged in the first channel in parallel;
the heat exchange inner tubes are respectively arranged in the heat exchange outer tubes in a penetrating manner, a second channel is formed between the heat exchange inner tubes and the heat exchange outer tubes, and a third channel is formed in the heat exchange inner tubes;
the second channel distribution pipe is arranged outside one end of the cylindrical body and is communicated with one end of the plurality of second channels, and a second channel inlet is formed in the second channel distribution pipe;
the second channel collecting pipe is arranged outside the other end of the cylindrical body and is communicated with the other ends of the plurality of second channels, and a second channel outlet is formed in the second channel collecting pipe;
the third channel distribution pipe is arranged outside the other end of the cylindrical body and is communicated with one end of the plurality of third channels, and a third channel inlet is formed in the third channel distribution pipe;
and the third channel collecting pipe is arranged outside one end of the cylindrical body and is communicated with the other ends of the plurality of third channels, and a third channel outlet is formed in the third channel collecting pipe.
Optionally, two ends of the sleeved heat exchange outer pipe and heat exchange inner pipe penetrate through the end part of the cylindrical body and are connected with the second channel distribution pipe or the second channel collection pipe through the first joint, so that the second channel is communicated with the second channel distribution pipe and the second channel collection pipe; and two ends of the heat exchange inner tube penetrate through the second channel distribution tube or the second channel collection tube through the second joint and are communicated with the third channel distribution tube or the third channel collection tube through the third joint.
Optionally, the second channel distribution pipe, the second channel collection pipe, the third channel distribution pipe and the third channel collection pipe are all annular pipes, and are arranged outside the end of the cylindrical body in parallel, and the second channel distribution pipe and the second channel collection pipe are close to the end of the cylindrical body.
Optionally, the first joint is hermetically sealed and connected outside the end part of the heat exchange outer pipe and is hermetically connected with the side wall of the second channel distribution pipe or the second channel collection pipe.
Optionally, the second joint is hermetically sleeved outside the heat exchange inner tube, is hermetically connected with the side wall of the second channel distribution tube or the second channel collection tube, and is located at the opposite side of the first joint.
Optionally, the third joint is sleeved outside the end of the heat exchange inner pipe in a sealing manner, and is connected with the side wall of the third channel distribution pipe or the third channel header in a sealing manner.
Optionally, the second channel inlet, the second channel outlet, the third channel inlet, and the third channel outlet are respectively disposed inside the annular structures of the second channel distribution pipe, the second channel header, the third channel distribution pipe, and the third channel header.
Optionally, the third channel distribution pipes and the third channel headers both include a plurality of pipes, the number of the pipes is equal, and the plurality of third channel distribution pipes and the plurality of third channel headers are in one-to-one correspondence to be communicated with two ends of part of the heat exchange inner pipes.
Optionally, the third channel distribution pipe and the third channel collection pipe are a plurality of isolated arc pipes.
Optionally, an inner sealing plate is arranged at the end of the central cylinder, an outer sealing plate is arranged at the end of the outer cylinder, a cavity between the inner sealing plate and the outer sealing plate is communicated with a first channel, and a first channel inlet and a first channel outlet are respectively arranged in the middle of the outer sealing plate at the two ends of the cylindrical body.
Compared with the prior art, the invention has the beneficial effects that:
1. the multi-channel efficient compact heat exchanger is provided with the heat exchange inner pipe and the heat exchange outer pipe which are sleeved with each other, and the sleeved heat exchange inner pipe and the sleeved heat exchange outer pipe are spirally arranged in a cylindrical body consisting of the central cylinder and the outer cylinder; a first channel is formed between the central cylinder and the outer cylinder, a second channel is formed between the heat exchange outer tube and the heat exchange inner tube, and a third channel is formed in the heat exchange inner tube; the three channels are sequentially overlapped, so that heat exchange of three medium flows can be realized simultaneously, and the media in the second channel and the third channel reversely flow, so that heat transfer between media with smaller temperature difference can be realized, the heat exchange condition with smaller temperature difference is met, and the heat exchange efficiency is high. The heat exchange inner pipe and the heat exchange outer pipe are arranged spirally, so that the pipe pass can be effectively prolonged, more heat exchange area is provided in unit volume, the occupied area is small, and the structure is compact; the fluid in the pipe flows spirally, secondary flow is formed on the cross section of the flow channel, and turbulent flow is formed between pipe layers by the fluid outside the pipe, so that the turbulent flow effect is realized, the heat exchange coefficient can be obviously improved, the heat exchange effect is improved, the adhesion of the fluid to the wall surface can be effectively reduced, scaling is not easy to occur, and long-period safe operation is realized; the heat exchange inner pipe and the heat exchange outer pipe are arranged spirally, partial thermal expansion can be automatically compensated, stress generated by the structure due to expansion difference is reduced, and the structure is more stable and safer.
2. The distribution pipes and the collecting pipes are respectively arranged, so that the medium is uniformly distributed into the second channel and the third channel, the uniform distribution of medium flow, pressure, heat flow density and the like in the whole heat exchanger is ensured, and the stable and efficient operation of the heat exchanger is ensured.
3. Arranging a first joint to realize transition connection of the heat exchange outer pipe to a second distribution pipe or a second collecting pipe; the second joint is arranged to ensure that the heat exchange inner pipe passes through the second distribution pipe or the second collecting pipe, so that the two media are prevented from leaking mutually; and a third joint is arranged to realize transitional connection of the heat exchange inner pipe to the third distribution pipe or the third collecting pipe.
4. The third channel distribution pipe and the third channel collecting pipe are arranged to be a plurality of pipes with the same number, and are connected with two ends of part of the heat exchange inner pipes in a one-to-one correspondence mode, so that the third channel is separated into a plurality of relatively independent medium channels, the number of working media of the heat exchanger can be increased, and the heat exchanger is suitable for heat exchange working conditions of more working media.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of the overall structure of a heat exchanger according to the present invention.
FIG. 2 is a schematic sectional view of a heat exchanger according to the present invention.
Fig. 3 is an enlarged schematic view of a portion a of fig. 2 according to the present invention.
Fig. 4 is an enlarged schematic structural view of a portion B in fig. 2 according to the present invention.
Fig. 5 is an enlarged schematic view of the portion C of fig. 2 according to the present invention.
Fig. 6 is a schematic top view of the heat exchanger according to the present invention.
Fig. 7 is a schematic bottom view of the heat exchanger according to the present invention.
Reference numerals:
100. a central barrel; 110. an inner sealing plate; 200. an outer cylinder; 210. a first channel; 211. a first channel inlet; 212. a first channel outlet; 220. an outer sealing plate; 300. an outer heat exchange tube; 310. a second channel; 320. a first joint; 400. a heat exchange inner tube; 410. a third channel; 420. a second joint; 430. a third joint; 500. a second channel distribution pipe; 510. a second channel inlet; 600. a second channel header; 610. a second channel outlet; 700. a third channel distribution pipe; 710. a third channel inlet; 800. a third channel header; 810. and a third passage outlet.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships that are based on the orientations and positional relationships shown in the drawings, or the orientations and positional relationships that the products of the present invention conventionally place when in use, or the orientations and positional relationships that are conventionally understood by those skilled in the art, are used for convenience in describing and simplifying the present invention, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 and 2, an embodiment of the present invention provides a multi-channel efficient compact heat exchanger, which is suitable for the fields of natural gas liquefaction, coal gasification waste heat recovery, air separation, hydrogen liquefaction, rare gas separation, low-temperature methanol washing, liquid nitrogen washing, and the like. It includes cylindrical body, spiral coil pipe, distribution pipe and collecting pipe.
Specifically, the cylindrical body comprises a central cylinder 100 and an outer cylinder 200, the central cylinder 100 is positioned inside, and the outer cylinder 200 and the central cylinder 100 are coaxially arranged and are sleeved outside the central cylinder 100; the cavity between the central cylinder 100 and the outer cylinder 200 is a first channel 210 for the liquid medium to flow through; one end of the cylindrical body is provided with a first channel inlet 211 communicating with the first channel 210, and the other end is provided with a first channel outlet 212 for the inlet and outlet of the liquid medium.
As shown in fig. 2 and 3, the spiral coil includes a plurality of heat exchange outer tubes 300 and heat exchange inner tubes 400, which are equal in number, and the heat exchange outer tubes 300 and the heat exchange inner tubes 400 are sleeved to form a spiral sleeve with uniform pitch. A plurality of heat exchange outer pipes 300 are arranged on the outer side of the central cylinder 100 in a vertically parallel spiral manner and are positioned in the first channel 210; the plurality of heat exchange inner tubes 400 are correspondingly inserted into the plurality of heat exchange outer tubes 300 one by one. A cavity channel between the heat exchange inner tube 400 and the heat exchange outer tube 300 is a second channel 310 for the circulation of a liquid medium; the channel in the heat exchange inner tube 400 is a third channel 410 for the liquid medium to flow through.
As shown in fig. 1 and 2, the distribution pipes include second and third channel distribution pipes 500 and 700. The second channel distribution pipe 500 is arranged outside the lower end of the cylindrical body and is communicated with the lower end of the second channel 310 in the spiral coil pipe; the second channel distribution pipe 500 is provided with a second channel inlet 510, and the liquid medium enters the second channel distribution pipe 500 through the second channel inlet 510, and then uniformly disperses into the second channel 310 in the spiral coil for heat exchange.
The third channel distribution pipe 700 is arranged outside the upper end of the cylindrical body and is communicated with the upper end of the third channel 410 in the spiral coil, namely, the upper end of the heat exchange inner pipe 400; the third channel distribution pipe 700 is provided with a third channel inlet 710, and the corresponding liquid medium enters the third channel distribution pipe 700 through the third channel inlet 710, and then uniformly dispersed and enters the third channel 310 (i.e. the heat exchange inner pipe 400) in the spiral coil pipe for heat exchange.
The headers include a second channel header 600 and a third channel header 800. The second channel header 600 is disposed outside the upper end of the cylindrical body and communicates with the upper end of the second channel 310 in the spiral coil; the second channel header 600 is provided with a second channel outlet 610, and the liquid medium in the second channel 310 is collected into the second channel header 600 after heat exchange is completed and discharged from the second channel outlet 610.
The third channel header 800 is arranged outside the lower end of the cylindrical body and is communicated with the lower end of the third channel 410 in the spiral coil, namely, the lower end of the heat exchange inner tube 400; the third channel header 800 is provided with a third channel outlet 810, and the liquid medium in the third channel 310 (i.e., the heat exchange inner tube 400) is subjected to heat exchange, then is converged into the third channel header 800, and is discharged from the third channel outlet 810.
Wherein the first channel inlet 211, the second channel distribution pipes 500 and the third channel collection pipe 800 are located at the lower end of the cylindrical body; the first channel outlets 212, the second channel headers 600 and the third channel distribution pipes 700 are located at the upper end of the cylindrical body. When the heat exchanger works, the medium entering from the third channel inlet 710 spirally flows from the upper part to the lower part, the medium entering from the second channel inlet 510 spirally flows from the lower part to the upper part, and a counter flow is formed between the two; the medium entering from the first channel inlet 211 flows upwards from the lower part and forms cross flow with the medium in the pipe under the turbulent flow action of the spiral coil pipe; the medium in each channel keeps the physical property, flow and pressure of each group independent, and completes heat exchange at the same time.
Specifically, the two ends of the sleeved heat exchange outer tube 300 and heat exchange inner tube 400 (i.e. spiral coil) respectively pass through the upper and lower ends of the cylindrical body, and are connected to the second channel distribution tube 500 or the second channel collection tube 600 through the first joint 320, so that the second channel 310 is communicated with the second channel distribution tube 500 and the second channel collection tube 600; then, both ends of the heat exchange inner tube 400 are sealed by the second joint 420 to pass through the second channel distribution tube 500 or the second channel header 600, and are communicated with the third channel distribution tube 700 or the third channel header 800 by the third joint 430, so that the third channel 410 is communicated with the third channel distribution tube 700 and the third channel header 800. Different media are respectively led into or led out of the second channel 310 and the third channel 410, and the two media are isolated from each other.
In one embodiment, the second channel distribution pipes 500, the second channel collection pipes 600, the third channel distribution pipes 700, and the third channel collection pipes 800 are all annular pipes and are arranged outside the end of the cylindrical pump body in parallel, wherein the second channel distribution pipes 500 and the second channel collection pipes 600 are closer to the end of the cylindrical body than the third channel collection pipes 800 and the third channel collection pipes 700. After the end parts of the heat exchange outer tube 300 and the heat exchange inner tube 400 which are sleeved penetrate out of the cylindrical body, the heat exchange outer tube is firstly connected with the second channel distribution tube 500 or the second channel collection tube 600, and then is connected with the third channel collection tube 800 or the third channel distribution tube 700, so that the structural distribution is more reasonable and compact, and the medium flows more smoothly.
As shown in fig. 2 and 4, the first joint 320 is sleeved outside the end of the heat exchange outer tube 300 in a sealing manner, and the outer side of the first joint 320 is connected with the side wall of the second channel distribution tube 500 or the second channel header 600 in a sealing manner, so as to communicate the second channel 310 with the second channel distribution tube 500 and the second channel header 600; the heat exchange inner tube 400 extends forward through the centers of the heat exchange outer tube 300 and the first connector 320.
The second joint 420 is hermetically sleeved outside the heat exchange inner tube 400 at the extending portion, and the outer side of the second joint is hermetically connected with the side wall of the second channel distribution tube 500 or the second channel header 600, so that the heat exchange inner tube 400 passes through the side wall of the second channel distribution tube 500 or the second channel header 600, and the leakage of the medium is not caused. The second header 420 is located at the opposite side of the first header 320 of the second channel distribution pipe 500 or the second channel header 600, i.e., the heat exchange inner pipe 400 is straight and does not bend.
As shown in fig. 2 and 5, the third joints 430 are hermetically sealed and connected to the two ends of the heat exchange inner tube 400, and are hermetically connected to the side walls of the third channel distribution tube 700 or the third channel header 800, so as to communicate the heat exchange inner tube 400 with the third channel distribution tube 700 and the third channel header 800.
The first joint 320, the second joint 420 and the third joint 430 have the same axis and are located on the same straight line. The first joint 320, the second joint 420 and the third joint 430 are arranged for transitional connection, so that the structural strength and the sealing performance of the connection part can be effectively guaranteed.
As shown in fig. 6 and 7, the second channel inlet 510, the second channel outlet 610, the third channel inlet 710 and the third channel outlet 810 are respectively disposed inside the annular structures of the second channel distribution pipe 500, the second channel header 600, the third channel distribution pipe 700 and the third channel through header 800, and are connected with the external pipes by the insides of the annular pipes, so that the structure is more compact and the occupied space is smaller.
In another embodiment, the third channel distribution tubes 700 and the third channel headers 800 each include a plurality of tubes, and the number of the tubes is equal, and the plurality of third channel distribution tubes 700 and the plurality of third channel headers 800 are in one-to-one correspondence with two ends of the partial heat exchange inner tubes 400; and each third channel distribution pipe 700 is provided with a third channel inlet 710, and each third channel header 800 is provided with a third channel outlet 810. The heat exchanger is provided with a plurality of relatively independent third channels 410, different media can be respectively introduced for heat exchange, the applicability of the heat exchanger is increased, and the heat exchanger is suitable for heat exchange working conditions of more working media.
Specifically, the third channel distribution pipes 700 and the third channel headers 800 may be a plurality of blocked arc pipes, and the plurality of third channel distribution pipes 700 or the plurality of third channel headers 800 may form an annular structure, which corresponds to the second channel headers 600 and the second channel distribution pipes 500 of the annular structure, respectively. Of course, the plurality of third channel distribution tubes 700 and third channel headers 800 may also each have an annular configuration.
As shown in fig. 2, the end of the central cylinder 100 is provided with an inner sealing plate 110, the end of the outer cylinder 200 is provided with an outer sealing plate 220, and a cavity between the inner sealing plate 110 and the outer sealing plate 220 is communicated with the first channel 210; the first channel inlet 211 and the second channel outlet 212 are respectively disposed in the middle of the outer sealing plate 220 at both ends of the cylindrical body, and the medium enters from the first channel inlet 211, flows through the first channel 210, and is discharged from the first channel outlet 212.
In summary, the heat exchanger of the present invention is provided with the heat exchange inner tube 400 and the heat exchange outer tube 300 which are sleeved with each other, and the heat exchange inner tube 400 and the heat exchange outer tube 300 which are sleeved with each other are spirally arranged in the cylindrical body formed by the central cylinder 100 and the outer cylinder 200; a first channel 210 is formed between the central cylinder 100 and the outer cylinder 200, a second channel 310 is formed between the heat exchange outer tube 300 and the heat exchange inner tube 400, and a third channel 410 is formed in the heat exchange inner tube 400; the three channels are sequentially overlapped, so that heat exchange of three medium flows can be realized simultaneously, and the media in the second channel 310 and the third channel 410 reversely flow, so that heat transfer between media with smaller temperature difference can be realized, the heat exchange condition with smaller temperature difference is met, and the heat exchange efficiency is high. Wherein, the heat exchange inner pipe has smaller pipe diameter, can bear higher pressure and can meet the heat exchange of pressure media with the pressure as high as 22 MPa; the inner heat exchange tube 400 and the outer heat exchange tube 300 are spirally arranged, so that the tube pass can be effectively prolonged, more heat exchange area is provided in unit volume, the occupied area is small, and the structure is compact; the fluid in the pipe flows spirally, secondary flow is formed on the cross section of the flow channel, and turbulent flow is formed between pipe layers by the fluid outside the pipe, so that the turbulent flow effect is realized, the heat exchange coefficient can be obviously improved, the heat exchange effect is improved, the adhesion of the fluid to the wall surface can be effectively reduced, scaling is not easy to occur, and long-period safe operation is realized; the heat exchange inner tube 400 and the heat exchange outer tube 300 are spirally arranged, partial thermal expansion can be automatically compensated, stress generated by the structure due to expansion difference is reduced, and the structure is more stable and safe.
The distribution pipes and the collection pipes are respectively arranged, so that the medium is uniformly distributed into the second channel 310 and the third channel 410, the uniform distribution of medium flow, pressure, heat flow density and the like in the whole heat exchanger is ensured, and the stable and efficient operation of the heat exchanger is ensured.
A first joint 320 is arranged to realize transition connection of the heat exchange outer tubes 300 to the second distribution tube 500 or the second header 600; the second joint 420 is arranged to ensure that the heat exchange inner pipe 400 passes through the second distribution pipe 500 or the second header 600, and the two media are prevented from leaking each other; the third joint 430 is arranged to realize transition connection of the heat exchange inner tubes to the third distribution tube 700 or the third header 800, so as to realize distribution of the medium and ensure uniform and stable distribution of the medium.
The third channel distribution pipe 700 and the third channel collection pipe 800 may be provided as a plurality of pipes with the same number, and the pipes are connected to two ends of part of the heat exchange inner pipes 400 in a one-to-one correspondence manner, so that the third channel 410 is separated into a plurality of relatively independent medium channels, the number of working media of the heat exchanger may be increased, and the heat exchanger is suitable for heat exchange working conditions with more working media.
Claims (4)
1. A multi-pass, high efficiency, compact heat exchanger comprising:
the device comprises a cylindrical body, wherein the cylindrical body comprises a central cylinder (100) and an outer cylinder (200) coaxially sleeved outside the central cylinder (100), a first channel (210) is arranged between the central cylinder (100) and the outer cylinder (200), one end of the cylindrical body is provided with a first channel inlet (211), and the other end of the cylindrical body is provided with a first channel outlet (212);
a plurality of heat exchange outer pipes (300) which are spirally arranged in parallel in the first channel (210);
the heat exchange tubes (400) are respectively arranged in the heat exchange outer tubes (300) in a penetrating manner, a second channel (310) is arranged between the heat exchange tubes (400) and the heat exchange outer tubes (300), and a third channel (410) is arranged in the heat exchange tubes (400);
the second channel distribution pipe (500) is arranged outside one end of the cylindrical body and is communicated with one end of the plurality of second channels (310), and a second channel inlet (510) is formed in the second channel distribution pipe (500);
a second channel header (600) arranged outside the other end of the cylindrical body and communicated with the other ends of the plurality of second channels (310), wherein a second channel outlet (610) is arranged on the second channel header (600);
the third channel distribution pipe (700) is arranged outside the other end of the cylindrical body and is communicated with one end of the third channels (410), and a third channel inlet (710) is formed in the third channel distribution pipe (700);
a third channel header (800) arranged outside one end of the cylindrical body and communicated with the other ends of the plurality of third channels (410), wherein a third channel outlet (810) is arranged on the third channel header (800);
wherein,
the second channel distribution pipe (500), the second channel collection pipe (600), the third channel distribution pipe (700) and the third channel collection pipe (800) are all annular pipes and are arranged outside the end part of the cylindrical body in parallel, and the second channel distribution pipe (500) and the second channel collection pipe (600) are close to the end part of the cylindrical body;
the two ends of the sleeved heat exchange outer pipe (300) and heat exchange inner pipe (400) penetrate through the end part of the cylindrical body, the heat exchange outer pipe (300) is sleeved outside the end part in a sealing mode through a first joint (320) and is connected with the side wall of the second channel distribution pipe (500) or the second channel collection pipe (600) in a sealing mode, and the second channel (310) is communicated with the second channel distribution pipe (500) and the second channel collection pipe (600);
the two ends of the heat exchange inner pipe (400) extend forwards through the center of the first joint (320), and penetrate through a second channel distribution pipe (500) or a second channel collection pipe (600) through a second joint (420), the second joint (420) is hermetically sealed outside the heat exchange inner pipe (400), is in sealed connection with the side wall of the second channel distribution pipe (500) or the second channel collection pipe (600), and is positioned at the opposite side of the first joint (320);
the heat exchange inner tube (400) is communicated with a third channel distribution tube (700) or a third channel collection tube (800) through a third joint (430), and the third joint (430) is hermetically sealed and connected outside the end part of the heat exchange inner tube (400) and is hermetically connected with the side wall of the third channel distribution tube (700) or the third channel collection tube (800);
the first joint (320), the second joint (420) and the third joint (430) are coaxially arranged;
the third channel distribution pipes (700) and the third channel collection pipes (800) are arranged to be a plurality of pipes with the same number, and the plurality of third channel distribution pipes (700) and the plurality of third channel collection pipes (800) are communicated with two ends of a part of the heat exchange inner pipes (400) in a one-to-one correspondence mode.
2. The multi-channel, high-efficiency, compact heat exchanger according to claim 1, characterized in that the second channel inlet (510), the second channel outlet (610), the third channel inlet (710) and the third channel outlet (810) are arranged inside the ring structure of the second channel distribution pipe (500), the second channel header (600), the third channel distribution pipe (700) and the third channel header (800), respectively.
3. The multi-channel, high efficiency, compact heat exchanger of claim 1 wherein the third channel distribution tubes (700) and third channel collection tubes (800) are a plurality of interrupted, arcuate tubes.
4. The multi-channel high-efficiency compact heat exchanger as claimed in claim 1, wherein the end of the central tube (100) is provided with an inner sealing plate (110), the end of the outer tube (200) is provided with an outer sealing plate (220), the cavity between the inner sealing plate (110) and the outer sealing plate (220) is communicated with the first channel (210), and the first channel inlet (211) and the first channel outlet (212) are respectively arranged in the middle of the outer sealing plate (220) at the two ends of the cylindrical body.
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| CN202110094298.7A CN112781405B (en) | 2021-01-25 | 2021-01-25 | High-efficient compact heat exchanger of multichannel formula |
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| CN202110094298.7A CN112781405B (en) | 2021-01-25 | 2021-01-25 | High-efficient compact heat exchanger of multichannel formula |
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