Multifunctional corrosion-resistant graphite heat exchanger

Abstract

The invention discloses a multifunctional anti-corrosion graphite heat exchanger which comprises a heat exchange main pipe, a ventilation mechanism, a transition pipe, a flow dividing equipment body, a first external pipe and a second external pipe. The heat exchange main pipe is arranged, the flowing main pipe, the connecting mechanism, the flowing auxiliary pipe and other assemblies are arranged at the inner end of the heat exchange main pipe, the flowing auxiliary pipe is arranged at the outer end of the flowing main pipe in a surrounding mode, fluid can be divided through the flowing main pipe and the flowing auxiliary pipe, and the heat exchange effect on the fluid is improved; the inner side of the main flow pipe, the inner side of the auxiliary flow pipe and the inner side of the main heat exchange pipe are connected through the connecting mechanisms, modular disassembly of the main flow pipe or the auxiliary flow pipe can be achieved, maintenance and replacement of the main flow pipe and the auxiliary flow pipe are facilitated, the maintenance cost is reduced, and maintenance convenience is improved; the inner pipe comprises the base layer, the inner layer, the middle layer and the surface layer, multi-layer protection on the inner pipe can be achieved, the anti-corrosion effect of the inner pipe is effectively improved, and the service life of the inner pipe is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchangers, and particularly to a multifunctional anti-corrosion graphite heat exchanger. Background Technique

[0002] ‌The graphite heat exchanger‌ is a heat exchange device made of impervious graphite as the base material. It has the characteristics of excellent heat conduction performance, small volume, light weight, and small floor area, and is suitable for occasions that require efficient heat transfer in various chemical production processes. Although the traditional graphite heat exchanger is corrosion-resistant, it still faces the risk of corrosion when operating in strong acids, high-temperature and high-concentration media for a long time. Moreover, most of them adopt an integral structure and are not detachable. When a part is damaged, the whole needs to be replaced, resulting in an increase in use costs and waste. In addition, it relies on a simple channel structure and is prone to a decrease in heat transfer efficiency due to fouling or gas blockage, affecting the heat exchange effect, making it difficult to meet people's usage requirements and restricting the application range. Summary of the Invention

[0003] The purpose of the present invention is to provide a multifunctional anti-corrosion graphite heat exchanger to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions: A multifunctional anti-corrosion graphite heat exchanger includes a main heat exchange pipe. A set of ventilation mechanisms are provided at the front and rear ends of the main heat exchange pipe. The other ends of the two sets of ventilation mechanisms are connected to a shunt device main body through a transition pipe. A set of first external connection pipes are connected to the middle of the sides of the two shunt device main bodies away from the main heat exchange pipe. A set of second external connection pipes are connected to the front and rear ends on the left side of the main heat exchange pipe; A main flow pipe is provided in the middle of the main heat exchange pipe. The outer end of the main flow pipe is connected to no less than two auxiliary flow pipes through a connection mechanism. The outer ends of the auxiliary flow pipes are connected to the inner side of the main heat exchange pipe through a connection mechanism. The outer sides of the main flow pipe and the auxiliary flow pipes form a second exchange space. The two sets of second external connection pipes are communicated with the second exchange space.

[0005] By adopting the above technical solutions, the main flow pipe and the auxiliary flow pipes can shunt the fluid, expand the contact area between the fluid and the outside, improve the heat exchange efficiency, and circulate the medium into the second exchange space through the two sets of second external connection pipes to realize the heat exchange between the internal and external media, further improving the heat exchange effect. Moreover, the connection mechanism can realize the modular disassembly and installation of the main flow pipe and the auxiliary flow pipes, which is convenient for maintenance.

[0006] Preferably, the main flow pipe includes an outer pipe, an inner pipe, a first exchange space, and heat dissipation fins. An inner pipe is provided at the inner end of the outer pipe. There is a first exchange space between the outer pipe and the inner pipe. At least two groups of heat dissipation fins are equidistantly arranged in the first exchange space. The inner ends of the heat dissipation fins are connected to the inner pipe, and the outer ends penetrate through the outer pipe and extend into the second exchange space.

[0007] By adopting the above technical solution, a heat exchange medium can flow in the first exchange space to perform the first heat exchange on the fluid, and the heat exchange effect on the fluid can be improved through the heat dissipation fins.

[0008] Preferably, the connecting mechanism includes connecting arms, connecting grooves, and connecting bumps. At least two groups of connecting arms are provided on the outer sides of the main flow pipe and the auxiliary flow pipe and the inner side of the main heat exchange pipe. Connecting grooves are provided at the other ends of the connecting arms on the outer side of the main flow pipe and the inner side of the main heat exchange pipe. Connecting bumps corresponding to the connecting grooves are connected to the other ends of the connecting arms on the outer side of the auxiliary flow pipe.

[0009] By adopting the above technical solution, the connecting arms are installed or disassembled through the connecting grooves and the connecting bumps, and modular disassembly and installation of the main flow pipe and the auxiliary flow pipe can be realized, which is beneficial to the maintenance and replacement of the main flow pipe and the auxiliary flow pipe.

[0010] Preferably, the inner pipe includes a base layer, an inner layer, an intermediate layer, and a surface layer. An inner layer is provided inside the base layer. The inner layer is connected to the intermediate layer inside. The intermediate layer is provided with a surface layer inside.

[0011] By adopting the above technical solution, through the base layer, inner layer, intermediate layer, and surface layer connected layer by layer, the corrosion resistance of the inner pipe can be improved and its service life can be extended.

[0012] Preferably, the ventilation mechanism includes an outer cover, a first annular pipe, a second annular pipe, and an air delivery pipe. A group of outer covers are connected to the front and rear ends of the main heat exchange pipe. The transition pipes penetrate through the outer covers and are connected to the main flow pipe and the auxiliary flow pipe. A first annular pipe is provided on the outer side of each transition pipe. A group of second annular pipes are provided on the middle transition pipe and the outer transition pipe. The second annular pipes are communicated with the first annular pipe. A group of air delivery pipes are connected to the left ends of the second annular pipes. The other ends of the air delivery pipes penetrate through and extend to the outer ends of the outer covers.

[0013] By adopting the above technical solution, a heat exchange medium is input into the second annular pipe through the air delivery pipe, then input into the first annular pipe from the second annular pipe, and finally input into the first exchange space, so as to realize the preliminary heat exchange of the fluid.

[0014] Preferably, the transition pipes and the first annular pipes are respectively provided with large and small pipes corresponding to the main flow pipe and the auxiliary flow pipe.

[0015] By adopting the above technical solution, the connection sealing performance and stability between the flow main pipe and the flow auxiliary pipe of different sizes can be achieved.

[0016] Preferably, the first annular pipe can communicate with the first exchange space.

[0017] By adopting the above technical solution, injecting the heat exchange medium into the first exchange space through the first annular pipe is beneficial to the heat exchange of the fluid.

[0018] Preferably, the heat dissipation fins are wavy fins, which are arranged alternately with the connecting arms.

[0019] By adopting the above technical solution, the heat exchange efficiency of the fluid in the inner pipe can be improved, and contact with the connecting arm can be avoided, ensuring the stable progress of heat exchange.

[0020] Preferably, the front end of the opening of the connecting groove is set as a rounded corner, and the inner end of the connecting groove is connected to the connecting protrusion through a clamping groove.

[0021] By adopting the above technical solution, the stability and convenience of the connection of the connecting arm can be improved.

[0022] Preferably, the flow main pipe and the flow auxiliary pipe assemblies are the same. The size of the flow main pipe is 2.5 - 6 times that of the flow auxiliary pipe, and the distance between the flow auxiliary pipes is 1.5 - 2 times the diameter of the flow auxiliary pipe.

[0023] By adopting the above technical solution, controlling the ratio of the flow main pipe to the flow auxiliary pipe can ensure sufficient heat transfer area, enhanced turbulence, and reasonable pressure drop. Limiting the distance between the flow auxiliary pipes can ensure sufficient heat exchange of the fluid while avoiding uneven heat field.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the present invention, the flow main pipe and the flow auxiliary pipe are arranged in the heat exchange main pipe. There are no less than two groups of flow auxiliary pipes arranged circumferentially at the outer end of the flow main pipe, which can divide the fluid flow, expand the heat exchange area between the fluid and the outside, and improve the heat exchange efficiency of the fluid. 2. In the present invention, the connection mechanism is used to connect the heat exchange main pipe with the flow main pipe and the flow auxiliary pipe, achieving a modular installation effect, meeting the modular disassembly and installation of the flow main pipe and the flow auxiliary pipe, and facilitating the maintenance and replacement of the flow main pipe and the flow auxiliary pipe. 3. In the present invention, the inner pipe is arranged in the outer pipe. The inner pipe includes components such as a base layer, an inner layer, an intermediate layer, and a surface layer, which can enhance the resistance to corrosive fluids while maintaining thermal conductivity, so as to extend its service life. Brief Description of the Drawings

[0025] Figure 1This is a schematic structural diagram of the present invention.

[0026] Figure 2 This is a schematic internal structure diagram of the heat exchange main pipe of the present invention.

[0027] Figure 3 This is a schematic internal structure diagram of the flow main pipe of the present invention.

[0028] Figure 4 This is a schematic internal structure diagram of the inner pipe of the present invention.

[0029] Figure 5 is Figure 2 an enlarged schematic structural diagram at position A in

[0030] Figure 6 This is a schematic connection structure diagram of the connection groove and the connection convex block of the present invention.

[0031] Figure 7 This is a front view schematic structural diagram of the ventilation mechanism of the present invention.

[0032] Figure 8 This is a sectional schematic structural diagram of the ventilation mechanism of the present invention.

[0033] In the figure: heat exchange main pipe - 1, ventilation mechanism - 2, transition pipe - 3, shunt equipment main body - 4, outer connecting pipe one - 5, outer connecting pipe two - 6, flow main pipe - 11, connecting mechanism - 12, flow auxiliary pipe - 13, second exchange space - 14, outer pipe - 111, inner pipe - 112, first exchange space - 113, heat dissipation fin - 114, connecting arm - 121, connection groove - 122, connection convex block - 123, base layer - 1121, inner layer - 1122, intermediate layer - 1123, surface layer - 1124, outer cover - 21, first annular pipe - 22, second annular pipe - 23, gas transmission pipe - 24. Detailed implementation manners

[0034] In order to further explain the technical solution of the present invention, the following will be elaborated in detail through specific embodiments.

[0035] Please refer to Figure 1 - Figure 2 , the present invention provides a multifunctional anti - corrosion graphite heat exchanger, including a heat exchange main pipe 1. A set of ventilation mechanisms 2 are installed at both the front and rear ends of the heat exchange main pipe 1. The other ends of the two sets of ventilation mechanisms 2 are both connected to a shunt equipment main body 4 through a transition pipe 3. The shunt equipment main body 4 can shunt or converge the fluid flowing through it. A set of outer connecting pipes one 5 are installed at the middle positions on the sides of the two sets of shunt equipment main bodies 4 away from the heat exchange main pipe 1. The outer connecting pipe one 5 can be connected to external equipment to convey the fluid to be heat - exchanged. A set of outer connecting pipes two 6 are installed at the front and rear ends on the left side of the heat exchange main pipe 1. The outer connecting pipe two 6 can be communicated with the second exchange space 14 to realize the circulation of the heat - exchange medium in the second exchange space 14.

[0036] Specifically, the front-end flow splitting device body 4 can split the fluid in the front-end outer connecting pipe 5, so that the fluid can flow into the heat exchange main pipe 1 through the front-end transition pipe 3 for heat exchange. At this time, the heat exchange medium can be injected into the second exchange space 14 through the outer connecting pipe 2 6 to assist in improving the heat exchange effect on the fluid. After the heat exchange is completed, the fluid converges with the rear-end flow splitting device body 4 through the rear-end transition pipe 3 and is output through the rear-end outer connecting pipe 5.

[0037] Please refer to Figure 2 , a group of flow main pipes 11 are installed in the middle end of the heat exchange main pipe 1. The outer ends of the flow main pipes 11 are connected with no less than two groups of flow sub-pipes 13 through a connecting mechanism 12. The flow sub-pipes 13 are arranged circumferentially at the outer ends of the flow main pipes 11. Among them, the flow main pipes 11 and the flow sub-pipes 13 have the same components. The size of the flow main pipes 11 is 2.5-3 times that of the flow sub-pipes 13, which can ensure sufficient heat transfer area, enhanced turbulence and reasonable pressure drop. The distance between the flow sub-pipes 13 is 1.5-2 times the diameter of the flow sub-pipes 13, which can avoid uneven heat field while ensuring sufficient heat exchange of the fluid. The outer ends of the flow sub-pipes 13 are connected with the inner side of the heat exchange main pipe 1 through the connecting mechanism 12, which is convenient for disassembly. The outer sides of the flow main pipes 11 and the flow sub-pipes 13 are the second exchange space 14. Two groups of outer connecting pipes 2 6 are communicated with the second exchange space 14, and the heat exchange medium can be injected into and output from the second exchange space 14 through the two groups of outer connecting pipes 2 6 to improve the heat exchange effect on the fluid.

[0038] Specifically, the flow main pipes 11 and the flow sub-pipes 13 can split the fluid, expand the contact area between the fluid and the outside, improve the heat exchange efficiency, and circulate the medium to the second exchange space 14 through the two groups of outer connecting pipes 2 6 to realize the heat exchange between the internal and external media, further improving the heat exchange effect. And through the connecting mechanism 12, modular disassembly and installation of the flow main pipes 11 and the flow sub-pipes 13 can be realized, which is convenient for maintenance.

[0039] Please refer to Figure 2 - Figure 3 , the flow main pipe 11 includes an outer pipe 111, an inner pipe 112, a first exchange space 113 and heat dissipation fins 114. The inner end of the outer pipe 111 is installed with the inner pipe 112. There is a first exchange space 113 between the outer pipe 111 and the inner pipe 112. No less than two groups of heat dissipation fins 114 are equidistantly arranged in the first exchange space 113. The inner ends of the heat dissipation fins 114 are fixedly connected with the inner pipe 112, and the outer ends penetrate through the outer pipe 111 and extend into the second exchange space 14. Among them, the heat dissipation fins 114 are wavy fins, which can expand the heat dissipation area. One end of the heat dissipation fins 114 extending into the second exchange space 14 is arranged staggered with the connecting arm 121, which can avoid contact with the connecting arm 121 and ensure the stable progress of heat exchange.

[0040] Specifically, by injecting a heat exchange medium into the first exchange space 113, the fluid in the inner pipe 112 can be heat-exchanged for the first time, and the heat exchange effect on the fluid can be improved by the heat dissipation fins 114.

[0041] Please refer to Figure 2 , Figure 3 , Figure 5 and Figure 6 , the connecting mechanism 12 includes a connecting arm 121, a connecting groove 122 and a connecting protrusion 123. There are no less than two groups of connecting arms 121 fixedly connected to the outer sides of the flow main pipe 11 and the flow sub-pipe 13 and the inner side of the heat exchange main pipe 1. The other ends of the connecting arms 121 on the outer side of the flow main pipe 11 and the inner side of the heat exchange main pipe 1 are all provided with connecting grooves 122. The other ends of the connecting arms 121 on the outer side of the flow sub-pipe 13 are all fixedly connected with connecting protrusions 123 corresponding to the connecting grooves 122. Among them, the front end of the opening of the connecting groove 122 is set as a rounded corner, which is convenient for the insertion of the connecting protrusion 123, and the inner end of the connecting groove 122 is connected to the connecting protrusion 123 through a clamping groove, which can improve the connection stability and convenience of the connecting groove 122 and the connecting protrusion 123.

[0042] Specifically, the connecting protrusion 123 can improve the convenience when inserting into the connecting groove 122 through the rounded corner at the front end of the opening of the connecting groove 122, and the clamping groove at the inner end of the connecting groove 122 can improve the stability when connecting with the connecting protrusion 123. Furthermore, the connection and fixation of the two groups of connecting arms 121 can be realized, and the modular disassembly and installation of the flow main pipe 11 and the flow sub-pipe 13 can be realized, which is beneficial to the maintenance and replacement of the flow main pipe 11 and the flow sub-pipe 13.

[0043] Please refer to Figure 4 , the inner pipe 112 includes a base layer 1121, an inner layer 1122, an intermediate layer 1123 and a surface layer 1124. The base layer 1121 is made of a high-purity graphite mixed polypropylene composite material, which not only retains the high thermal conductivity of graphite but also utilizes the chemical corrosion resistance characteristics of polypropylene to effectively extend the service life. The inner layer 1122 is adhesively connected to the inner side of the base layer 1121. The inner layer 1122 is a resin composite coating, which can improve the bonding effect of two adjacent groups of materials. The intermediate layer 1123 is connected to the inner side of the inner layer 1122. The intermediate layer 1123 is made of nano-ceramic particles, which can strengthen the strength of the inner pipe 112. The surface layer 1124 is sprayed on the inner side of the intermediate layer 1123. The surface layer 1124 is an ultra-thin graphene modified anti-corrosion coating, which has good weather resistance and thermal conductivity. It can strengthen the corrosion resistance of the inner pipe 112 while not affecting the heat conduction effect of the inner pipe 112.

[0044] Specifically, through the layer-by-layer connection of the base layer 1121, the inner layer 1122, the intermediate layer 1123 and the surface layer 1124, the corrosion resistance of the inner pipe 112 is improved and the service life of the inner pipe 112 is extended.

[0045] Please refer toFigure 7 - Figure 8 The ventilation mechanism 2 includes an outer cover 21, a first annular pipe 22, a second annular pipe 23 and an air delivery pipe 24. A set of outer covers 21 are fixedly connected to the front and rear ends of the heat exchange main pipe 1. The transition pipe 3 is provided with large and small pipes corresponding to the flow main pipe 11 and the flow sub-pipe 13, and they all penetrate through the outer cover 21 and are connected to the flow main pipe 11 and the flow sub-pipe 13, and can input the fluid after shunting into the flow main pipe 11 and the flow sub-pipe 13. The first annular pipes 22 are installed on the outer sides of the transition pipes 3, and the first annular pipes 22 can be communicated with the first exchange space 113, which is convenient for inputting the heat exchange medium into the first exchange space 113. A set of second annular pipes 23 are provided between the middle transition pipe 3 and the outer transition pipe 3. The second annular pipes 23 are communicated with the first annular pipes 22. A set of air delivery pipes 24 are connected to the left ends of the second annular pipes 23, and the other ends of the air delivery pipes 24 all penetrate and extend to the outer ends of the outer cover 21.

[0046] Specifically, the heat exchange medium is input into the second annular pipe 23 through the front-end air delivery pipe 24, then input into the first annular pipe 22 through the second annular pipe 23, and finally input into the first exchange space 113, which can assist the fluid in the inner pipe 112 to conduct heat exchange, and is output through the rear-end first annular pipe 22, the second annular pipe and the air delivery pipe 24 to maintain the fluidity of the heat exchange medium and ensure the heat exchange effect on the medium. The present invention provides a multifunctional anti-corrosion graphite heat exchanger. Through the flow main pipe 11 and the flow sub-pipe 13 arranged in the heat exchange main pipe 1, not less than two groups of flow sub-pipes 13 are arranged circumferentially at the outer end of the flow main pipe 11, which can shunt the fluid, expand the heat exchange area between the fluid and the outside, and improve the heat exchange efficiency of the fluid; the connection between the heat exchange main pipe 1 and the flow main pipe 11 and the flow sub-pipe 13 is realized through the connection mechanism 12, achieving a modular installation effect, meeting the modular disassembly and installation of the flow main pipe 11 and the flow sub-pipe 13, and facilitating the maintenance and replacement of the flow main pipe 11 and the flow sub-pipe 13; through the inner pipe 112 arranged in the outer pipe 111, the inner pipe 112 includes components such as a base layer 1121, an inner layer 1122, an intermediate layer 1123 and a surface layer 1124, which can, while maintaining the thermal conductivity, enhance and improve the resistance effect on corrosive fluids to increase its service life.

[0047] The above are only the preferred examples of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A multifunctional corrosion-resistant graphite heat exchanger, characterized in that: It comprises a heat exchange main pipe (1), the front and rear ends of the heat exchange main pipe (1) are both provided with a set of ventilation mechanisms (2), the other ends of the two sets of ventilation mechanisms (2) are both connected to a flow diversion device body (4) via a transition pipe (3), the middle ends of the two sets of flow diversion device bodies (4) on a side away from the heat exchange main pipe (1) are both connected to a set of external pipe 1 (5), and the front and rear ends of the left side of the heat exchange main pipe (1) are both connected to a set of external pipe 2 (6); A group of flow main pipes (11) is provided at the middle end of the heat exchange main pipe (1); the outer end of the flow main pipe (11) is connected to at least two groups of flow sub-pipes (13) via a connecting mechanism (12); the outer ends of the flow sub-pipes (13) are connected to the inner side of the heat exchange main pipe (1) via the connecting mechanism (12); the outer sides of the flow main pipe (11) and the flow sub-pipes (13) are second exchange spaces (14); and the two groups of external pipes (6) are in communication with the second exchange spaces (14).

2. A multifunctional corrosion-resistant graphite heat exchanger according to claim 1, characterized in that: The flow main pipe (11) comprises an outer pipe (111), an inner pipe (112), a first exchange space (113) and heat dissipation fins (114); the inner end of the outer pipe (111) is provided with the inner pipe (112); a first exchange space (113) is provided between the outer pipe (111) and the inner pipe (112); at least two groups of heat dissipation fins (114) are provided at equal intervals in the first exchange space (113); the inner ends of the heat dissipation fins (114) are connected to the inner pipe (112); the outer ends thereof penetrate the outer pipe (111) and extend into the second exchange space (14).

3. A multifunctional corrosion-resistant graphite heat exchanger according to claim 2, characterized in that: The connection mechanism (12) comprises a connection arm (121), a connection groove (122) and a connection protrusion (123); the outer sides of the main flow pipe (11) and the auxiliary flow pipe (13) and the inner side of the main heat exchange pipe (1) are each provided with at least two groups of connection arms (121); the other ends of the connection arms (121) on the outer side of the main flow pipe (11) and the inner side of the main heat exchange pipe (1) are each provided with a connection groove (122); and the other ends of the connection arms (121) on the outer side of the auxiliary flow pipe (13) are each connected to a connection protrusion (123) corresponding to the connection groove (122).

4. A multifunctional corrosion-resistant graphite heat exchanger according to claim 2, characterized in that: The inner tube (112) comprises a base layer (1121), an inner layer (1122), an intermediate layer (1123) and a surface layer (1124); the inner side of the base layer (1121) is provided with the inner layer (1122); the inner side of the inner layer (1122) is connected to the intermediate layer (1123); and the inner side of the intermediate layer (1123) is provided with the surface layer (1124).

5. The multifunctional corrosion-resistant graphite heat exchanger according to claim 1, characterized in that: The ventilation mechanism (2) comprises an outer cover (21), a first annular tube (22), a second annular tube (23) and an air supply pipe (24); the front and rear ends of the heat exchange main pipe (1) are connected to a group of outer covers (21); the transition pipes (3) penetrate the outer cover (21) and are connected to the flow main pipe (11) and the flow auxiliary pipe (13); the outer side of the transition pipe (3) is provided with a first annular tube (22); the middle end of the transition pipe (3) and the outer end of the transition pipe (3) are provided with a group of second annular tubes (23); the second annular tube (23) is communicated with the first annular tube (22); the left end of the second annular tube (23) is connected to a group of air supply pipes (24); the other end of the air supply pipe (24) penetrates and extends to the outer end of the outer cover (21).

6. A multifunctional corrosion-resistant graphite heat exchanger according to claim 5, characterized in that: The transition pipe (3) and the first annular pipe (22) are both provided with large and small pipes corresponding to the main flow pipe (11) and the auxiliary flow pipe (13).

7. The multifunctional corrosion-resistant graphite heat exchanger according to claim 5, characterized in that: The first annular tube (22) can be in communication with the first exchange space (113).

8. The multifunctional corrosion-resistant graphite heat exchanger according to claim 3, characterized in that: The heat dissipation fins (114) are wavy fins, and are arranged in a staggered manner with the connecting arms (121).

9. The multifunctional corrosion-resistant graphite heat exchanger according to claim 3, characterized in that: The front end of the opening of the connection groove (122) is configured as a rounded corner, and the inner end of the connection groove (122) is connected to the connection protrusion (123) via a clamping groove.

10. The multifunctional corrosion-resistant graphite heat exchanger according to claim 1, characterized in that: The main flow pipe (11) and the secondary flow pipe (13) are the same component, the size of the main flow pipe (11) is 2.5-3 times that of the secondary flow pipe (13), and the spacing between the secondary flow pipes (13) is 1.5-2 times the diameter of the secondary flow pipe (13).

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