A multi-stage casing heat exchanger

Abstract

The present invention discloses a multi-stage casing heat exchanger, which includes a heat exchange inner tube, a heat exchange intermediate tube and a heat exchange outer tube that are concentrically arranged; the area inside the heat exchange inner tube is set as the first medium flow area, the area between the heat exchange inner tube and the heat exchange intermediate tube is set as the second medium flow area, and the area between the heat exchange intermediate tube and the heat exchange outer tube is set as the third medium flow area. On the inner wall of the heat exchange inner tube of the present invention, heat exchange fins extending inward are provided, and heat exchange support fins are correspondingly arranged between the heat exchange intermediate tube and the heat exchange outer tube. The heat exchange support fins first connect and install the heat exchange intermediate tube and the heat exchange outer tube into one body; in addition, they can absorb the heat of the hot medium in the second medium flow area, and the heat exchange support fins are arranged in a structure integrated with the heat exchange fins. Therefore, the heat will flow along the heat exchange fins to the heat exchange inner tube. A cold medium flows in the heat exchange inner tube, which can correspondingly improve the heat exchange efficiency of the cold medium in the heat exchange inner tube and increase the heat exchange area.

Description

Technical Field

[0001] The present invention belongs to heat exchange equipment in the field of environmental protection technology, and particularly relates to a multi-stage sleeve heat exchanger. Background Art

[0002] In the prior art, a heat exchanger utilizes the temperature difference between hot and cold different media for heat exchange. In the prior art, heat exchangers are widely used in various fields such as physics, medicine, air-conditioning manufacturing, etc., and the most commonly used and simplest heat exchange equipment in the existing heat exchangers is mostly a sleeve heat exchange mechanism.

[0003] A sleeve-type heat exchange device usually has a plurality of concentric sleeves of different layers, and then different heat exchange media are passed through the concentric sleeves, and heat transfer is achieved through the temperature difference between the heat exchange media, so as to realize heat exchange, and its structure is mostly a sleeve-type structure.

[0004] For example: in the technical solution of the application publication number: CN 102278901 A, "a sleeve heat exchanger" is disclosed. In this technical solution, it includes an inner tube and an outer tube. The inner tube is located inside the outer tube. The upper end of the outer tube is connected to the medium inlet, the lower end of the outer tube is sealed, the upper end of the inner tube is connected to the medium outlet, and the lower end of the inner tube is open.

[0005] Its main function is to be able to increase the contact surface with the surrounding filler or soil body, then the flow rate of the heat exchange medium in the outer tube can be reduced, the heat exchange time of the heat exchange medium can be increased, and the problem that the heat exchange media in the inner and outer tubes flow by their own gravity is solved.

[0006] However, in the above technical solution, the area between the inner tube and the outer tube is still set to be relatively empty, and no heat exchange fins for increasing the heat exchange efficiency are provided inside, resulting in a reduction in heat exchange efficiency.

[0007] Therefore, in order to solve the above technical problems, it is necessary to develop a multi-stage sleeve heat exchanger that can increase the heat exchange area and heat exchange efficiency. Summary of the Invention

[0008] Technical Problem: Aiming at the above problems existing in the prior art, the technical problem to be solved by the present invention is to provide a multi-stage sleeve heat exchanger to avoid artificial bundling or short-circuiting and improve the use safety of pressure vessels.

[0009] Technical Solution: In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: A multi-stage sleeve heat exchanger includes a heat exchange inner tube, a heat exchange intermediate tube, and a heat exchange outer tube that are concentrically arranged; the area inside the heat exchange inner tube is set as the first medium flow area, the area between the heat exchange inner tube and the heat exchange intermediate tube is set as the second medium flow area, and the area between the heat exchange intermediate tube and the heat exchange outer tube is set as the third medium flow area.

[0010] On the inner side wall of the heat exchange inner tube, a number of heat exchange fins extending inwards are provided, and all of the heat exchange fins correspondingly point to the center of the heat exchange inner tube; and a heat exchange support fin is also installed between the heat exchange inner tube and the heat exchange intermediate tube, and the heat exchange support fins are evenly spaced between the heat exchange inner tube and the heat exchange intermediate tube, and correspondingly connect the heat exchange inner tube and the heat exchange intermediate tube into one body.

[0011] A heat exchange docking tube is also installed between the heat exchange intermediate tube and the heat exchange outer tube. Semi-circular tubes are correspondingly provided on the outer side wall of the heat exchange intermediate tube and the inner side wall of the heat exchange outer tube, and docking plates are correspondingly provided at the end positions of the two semi-circular tubes, and staggered insertion blocks are also correspondingly provided at the end positions of the docking plates. Through the provided insertion blocks, the semi-circular tube on the outer wall of the heat exchange intermediate tube and the semi-circular tube on the inner wall of the heat exchange outer tube can be docked and installed into an integral heat exchange docking tube.

[0012] The heat exchange outer tube is provided with a split structure and is formed by docking and installing two semi-circular tube bodies into one body. An installation plate is correspondingly provided at the docking position, and an installation component is provided on the installation plate.

[0013] Further, a first medium is introduced into the first medium circulation area, a second medium is introduced into the second circulation area, and a third medium is introduced into the third circulation medium, and the circulation direction of the first medium is opposite to that of the second medium, and the circulation direction of the second medium is opposite to that of the third medium.

[0014] Further, a total of six heat exchange fins are provided at the inner wall of the heat exchange inner tube, and six heat exchange support fins are also correspondingly provided between the heat exchange inner tube and the heat exchange intermediate tube.

[0015] Further, the heat exchange fins on the inner wall of the heat exchange inner tube and the heat exchange support fins at the middle position are provided with an integrally extended structure, and the heat exchange fins and the heat exchange support fins are correspondingly located on the same diameter.

[0016] Further, the heat exchange docking tube is arranged in the third medium circulation area, and a total of six heat exchange docking tubes are provided, and the six heat exchange docking tubes are evenly spaced.

[0017] Further, the heat exchange docking tube and the heat exchange support fin are arranged at intervals and staggered inside and outside, and when the heat exchange outer tube outside can be disassembled, the semi-circular tube on the inner wall of the heat exchange outer tube can also be disassembled.

[0018] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0019] (1) On the inner wall of the heat exchange inner tube of the present invention, heat exchange fins extending inward are provided, and heat exchange support fins are correspondingly provided between the heat exchange intermediate tube and the heat exchange outer tube. The heat exchange support fins first connect and install the heat exchange intermediate tube and the heat exchange outer tube into an integral body; in addition, they can absorb the heat of the hot medium in the second medium circulation area, and the heat exchange support fins are integrally connected with the heat exchange fins. Therefore, heat will flow along the heat exchange fins to the heat exchange inner tube. A cold medium flows through the heat exchange inner tube, which can correspondingly increase the heat exchange efficiency of the cold medium in the heat exchange inner tube and increase the heat exchange area;

[0020] (2) In the present invention, a heat exchange docking tube is also provided between the heat exchange intermediate tube and the heat exchange outer tube. First of all, the heat exchange outer tube itself is of a docking type installation, a detachable structure. Installation plates are provided on the two semi-circular tube bodies on both sides, and through the installation plates, docking installation or corresponding disassembly can be carried out; the heat exchange docking tube in the inner first circulation area is also correspondingly set to a docking detachable structure. Semi-circular tubes are respectively installed on the outer wall of the heat exchange intermediate tube and the inner wall of the heat exchange outer tube, and docking plates are provided at the ends of the semi-circular tubes. Interleaved insertion blocks are provided on the docking plates. After the two semi-circular tubes are docked, they can correspondingly form an integral docking heat exchange tube. After such a setting, after the outer heat exchange outer tube is disassembled, the inner heat exchange docking tube can also be correspondingly disassembled, which is convenient for maintenance and disassembly and installation, and can timely check the internal situation of the heat exchange docking tube;

[0021] (3) In the present invention, the heat exchange docking tube also has the function of increasing the heat exchange efficiency and heat exchange quality. One of the two semi-circular tubes of the heat exchange docking tube is docked and installed on the heat exchange outer tube, and the other is docked and installed on the heat exchange intermediate tube. The hot medium in the second circulation medium inside the heat exchange intermediate tube will transfer the heat from the tube wall of the intermediate tube to the intermediate tube, increasing the heat exchange area with the cold medium flowing in the first circulation area. At the same time, the semi-circular tube on the heat exchange outer tube can also disperse the cold medium flowing inside. After the cold medium flows through the heat exchange docking tube, the heat exchange efficiency is effectively increased. Brief Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of the present invention;

[0023] Figure 2 is Figure 1 the enlarged view of part A in

[0024] Figure 3 is Figure 1 a side view. Detailed Embodiment

[0025] The following combines specific embodiments to further clarify the present invention. The embodiments are implemented on the premise of the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention.

[0026] Such asFigure 1 , Figure 2 and Figure 3 As shown in Figure 1 , Figure 2 and Figure 3 , a multi-stage sleeve heat exchanger includes a heat exchange inner tube 1, a heat exchange intermediate tube 2 and a heat exchange outer tube 3 which are concentrically arranged; the area inside the heat exchange inner tube 1 is set as the first medium flow area 101, the area between the heat exchange inner tube 1 and the heat exchange intermediate tube 2 is set as the second medium flow area 102, and the area between the heat exchange intermediate tube 2 and the heat exchange outer tube 3 is set as the third medium flow area 103.

[0027] The first medium is introduced into the first medium flow area 101, the second medium is introduced into the second flow area, and the third medium is introduced into the third medium. Moreover, the flow direction of the first medium is opposite to that of the second medium, and the flow direction of the second medium is opposite to that of the third medium.

[0028] The multi-stage sleeve structure of the present invention is provided with three in total, including the heat exchange inner tube, the heat exchange intermediate tube and the heat exchange outer tube. The three tubes are sleeved concentrically. The three sleeves together constitute the flow areas of the three media. First, the middle second medium flow area can be set as the hot medium, and the first medium flow area and the third medium flow area on both sides can be set as cold media. In this way, the heat of the hot medium in the middle can be transferred to the cold media from both sides respectively, thereby increasing the heat exchange media.

[0029] A plurality of heat exchange fins 4 extending inward are arranged on the inner side wall of the heat exchange inner tube 1, and the heat exchange fins 4 all point to the center of the heat exchange inner tube 1 correspondingly; a heat exchange support fin 5 is also installed between the heat exchange inner tube 1 and the heat exchange intermediate tube 2. The heat exchange support fins 5 are evenly spaced between the heat exchange inner tube 1 and the heat exchange intermediate tube 2 and connect the heat exchange inner tube 1 and the heat exchange intermediate tube 2 into one body correspondingly.

[0030] A total of six heat exchange fins 4 are provided on the inner wall of the heat exchange inner tube 1, and six heat exchange support fins 5 are also correspondingly provided between the heat exchange inner tube 1 and the heat exchange intermediate tube 2; the heat exchange fins 4 on the inner wall of the heat exchange inner tube 1 and the heat exchange support fins 5 at the middle position are set as an integral extension structure, and the heat exchange fins 4 and the heat exchange support fins 5 are correspondingly located on the same diameter.

[0031] Heat exchange fins extending inward are arranged on the inner wall of the heat exchange inner tube of the present invention, and heat exchange support fins are correspondingly arranged between the heat exchange intermediate tube and the heat exchange outer tube. The heat exchange support fins first connect and install the heat exchange intermediate tube and the heat exchange outer tube into one body; in addition, they can absorb the heat of the hot medium in the second medium flow area. The heat exchange support fins are set as a structure integrated with the heat exchange fins. Therefore, the heat will flow along the heat exchange fins to the heat exchange inner tube. There is a cold medium flowing in the heat exchange inner tube, which can correspondingly increase the heat exchange efficiency of the cold medium in the heat exchange inner tube and increase the heat exchange area.

[0032] A heat exchange docking pipe 6 is also installed between the heat exchange intermediate pipe 2 and the heat exchange outer pipe 3. Semi-circular pipes 61 are respectively provided on the outer side wall of the heat exchange intermediate pipe 2 and the inner side wall of the heat exchange outer pipe 3. Docking plates 62 are respectively provided at the end positions of the two semi-circular pipes 61, and staggered insertion blocks 63 are also provided at the end positions of the docking plates 62. Through the provided insertion blocks 63, the semi-circular pipe 61 on the outer wall of the heat exchange intermediate pipe 2 and the semi-circular pipe 61 on the inner wall of the heat exchange outer pipe 3 can be docked and installed into an integral heat exchange docking pipe 6.

[0033] The heat exchange outer pipe 3 is arranged as a split structure and is formed by docking and installing two semi-circular pipe bodies into one body. An installation plate 7 is provided at the docking position, and an installation component is provided on the installation plate 7; the heat exchange docking pipe 6 is arranged in the third medium flow area 103, and a total of six heat exchange docking pipes 6 are provided, and the six heat exchange docking pipes 6 are evenly spaced.

[0034] The heat exchange docking pipe 6 and the heat exchange support piece 5 are arranged at intervals and staggered inside and outside. When the heat exchange outer pipe 3 outside can be disassembled, the semi-circular pipe 61 on the inner wall of the heat exchange outer pipe 3 can also be disassembled.

[0035] In the present invention, a heat exchange docking pipe is also provided between the heat exchange intermediate pipe and the heat exchange outer pipe. First of all, the heat exchange outer pipe itself is a docking type installation and a detachable structure. Installation plates are provided on the two semi-circular pipe bodies on both sides. Through the installation plates, docking installation or corresponding disassembly can be carried out; and the heat exchange docking pipe in the inner first flow area is also correspondingly arranged as a docking detachable structure. Semi-circular pipes are respectively installed on the outer wall of the heat exchange intermediate pipe and the inner wall of the heat exchange outer pipe, and docking plates are provided at the ends of the semi-circular pipes, and staggered insertion blocks are provided on the docking plates. After the two semi-circular pipes are docked, they can correspondingly form an integral docking heat exchange pipe. After such a setting, after the outer heat exchange outer pipe is disassembled, the inner heat exchange docking pipe can also be correspondingly disassembled, which is convenient for maintenance and disassembly and installation, and can timely check the internal situation of the heat exchange docking pipe.

[0036] In addition, the heat exchange docking pipe also has the function of increasing the heat exchange efficiency and heat exchange quality. One of the two semi-circular pipes of the heat exchange docking pipe is docked and installed on the heat exchange outer pipe, and the other is docked and installed on the heat exchange intermediate pipe. The heat medium in the second flow medium inside the heat exchange intermediate pipe will transfer the heat from the pipe wall of the heat exchange intermediate pipe to the intermediate pipe, increasing the heat exchange area with the cold medium flowing in the first flow area. At the same time, the semi-circular pipe on the heat exchange outer pipe can also disperse the cold medium flowing inside. After the cold medium flows through the heat exchange docking pipe, the heat exchange efficiency is effectively increased.

[0037] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A multi-stage casing heat exchanger, characterized in that, It includes a concentrically arranged inner heat exchange tube (1), an intermediate heat exchange tube (2), and an outer heat exchange tube (3); the area inside the inner heat exchange tube (1) is set as the first medium flow area (101), the area between the inner heat exchange tube (1) and the intermediate heat exchange tube (2) is set as the second medium flow area (102), and the area between the intermediate heat exchange tube (2) and the outer heat exchange tube (3) is set as the third medium flow area (103); On the inner side wall of the inner heat exchange tube (1), there are several heat exchange fins (4) extending inward, and all of the heat exchange fins (4) point correspondingly towards the center of the inner heat exchange tube (1); and between the inner heat exchange tube (1) and the intermediate heat exchange tube (2), there is also installed a heat exchange support fin (5), and the heat exchange support fins (5) are evenly spaced between the inner heat exchange tube (1) and the intermediate heat exchange tube (2), and correspondingly connect the inner heat exchange tube (1) and the intermediate heat exchange tube (2) into one body; Between the intermediate heat exchange tube (2) and the outer heat exchange tube (3), there is also installed a heat exchange docking tube (6). On the outer side wall of the intermediate heat exchange tube (2) and the inner side wall of the outer heat exchange tube (3), there are correspondingly arranged semi-circular tubes (61). At the end positions of the two semi-circular tubes (61), there are correspondingly arranged docking plates (62), and at the end positions of the docking plates (62), there are also correspondingly arranged staggered insertion blocks (63). Through the arranged insertion blocks (63), the semi-circular tube (61) on the outer wall of the intermediate heat exchange tube (2) and the semi-circular tube (61) on the inner wall of the outer heat exchange tube (3) can be docked and installed into an integral heat exchange docking tube (6); The outer heat exchange tube (3) is set as a split structure, which is formed by docking and installing two semi-circular tube bodies into one body. At the docking position, there is correspondingly arranged a mounting plate (7), and on the mounting plate (7), there is a mounting component; There are a total of six heat exchange fins (4) on the inner wall of the inner heat exchange tube (1), and there are also correspondingly six heat exchange support fins (5) between the inner heat exchange tube (1) and the intermediate heat exchange tube (2); The heat exchange docking tube (6) is arranged in the third medium flow area (103), and there are a total of six heat exchange docking tubes (6), and the six heat exchange docking tubes (6) are evenly spaced; The heat exchange docking tube (6) and the heat exchange support fin (5) are spaced and staggered in the inner and outer positions, and when the outer heat exchange tube (3) outside can be disassembled, the semi-circular tube (61) on the inner wall of the outer heat exchange tube (3) can also be disassembled.

2. The multi-stage casing heat exchanger according to claim 1, characterized in that, The first medium is introduced into the first medium flow area (101), the second medium is introduced into the second flow area, the third medium is introduced into the third medium, and the flow direction of the first medium is opposite to that of the second medium, and the flow direction of the second medium is opposite to that of the third medium.

3. A multi-stage sleeve type heat exchanger according to claim 1, characterized in that, The heat exchange fin (4) on the inner wall of the inner heat exchange tube (1) and the heat exchange support fin (5) at the middle position are set as an integrally extended structure, and the heat exchange fin (4) and the heat exchange support fin (5) are correspondingly located on the same diameter.

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