Multifunctional anticorrosion graphite heat exchanger

Abstract

The application discloses a multifunctional anti-corrosion graphite heat exchanger which comprises a heat exchange main pipe, a ventilation mechanism, a transition pipe, a shunt equipment main body, an external connecting pipe one and an external connecting pipe two. The heat exchange main pipe is internally provided with a flow main pipe, a connecting mechanism and a flow auxiliary pipe and the like components. The flow main pipe is externally provided with the flow auxiliary pipe in a surrounding mode. The flow main pipe and the flow auxiliary pipe can shunt fluid, improve the heat exchange effect of the fluid, and adopt the connecting mechanism to connect the flow main pipe, the flow auxiliary pipe and the inner side of the heat exchange main pipe. The modularized disassembly of the flow main pipe or the flow auxiliary pipe can be realized, the flow main pipe and the flow auxiliary pipe are convenient to maintain and replace, the maintenance cost is reduced, the convenience during maintenance is improved, the flow main pipe further comprises an outer pipe and an inner pipe and the like components, the inner pipe comprises a base layer, an inner layer, an intermediate layer and a surface layer, the multi-layer protection of the inner pipe can be realized, 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 application relates to the technical field of heat exchangers, in particular to a multifunctional anti-corrosion graphite heat exchanger. BACKGROUND

[0002] The graphite heat exchanger is a heat exchange equipment made of impermeable graphite as a base material, which has the characteristics of excellent heat conduction performance, small volume, light weight and small floor area, and is suitable for occasions requiring efficient heat transfer in various chemical production processes.

[0003] Although the traditional graphite heat exchanger is corrosion-resistant, it still faces corrosion risks when operating in strong acid, high temperature and high concentration medium for a long time, and is mostly of a monolithic structure and cannot be disassembled, so that the whole needs to be replaced when local damage occurs, causing waste of use cost and increasing the use cost, and relying on a simple channel structure, which is prone to cause heat transfer efficiency to be reduced due to fouling or gas resistance, affecting the heat exchange effect, and is difficult to meet the use requirements of people, limiting the application range. SUMMARY

[0004] The purpose of the present application is to provide a multifunctional anti-corrosion graphite heat exchanger to solve the problems raised in the background art.

[0005] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows: a multifunctional anti-corrosion graphite heat exchanger, comprising a heat exchange main pipe, a group of ventilation mechanisms are arranged at the front and rear ends of the heat exchange main pipe, the other ends of the two groups of ventilation mechanisms are connected with a shunt device body through a transition pipe, a group of external pipes one are connected to the middle ends of the sides away from the heat exchange main pipe of the two groups of shunt device bodies, and a group of external pipes two are connected to the left side of the heat exchange main pipe.

[0006] A group of flow main pipes are arranged in the middle end of the heat exchange main pipe, not less than two groups of flow auxiliary pipes are connected to the outer end of the flow main pipe through a connecting mechanism, the outer end of the flow auxiliary pipe is connected to the inner side of the heat exchange main pipe through a connecting mechanism, the outer side of the flow main pipe and the flow auxiliary pipe is a second exchange space, and the two groups of external pipes two are in communication with the second exchange space.

[0007] Through the above technical scheme, the flow main pipe and the flow auxiliary pipe can shunt the fluid, expand the contact area of the fluid with the outside, and improve the heat exchange efficiency, and the two groups of external pipes two can circulate the medium to the second exchange space, realize the heat exchange between the inner and outer media, further improve the heat exchange effect, and the connecting mechanism can realize the modular disassembly and installation of the flow main pipe and the flow auxiliary pipe, facilitating maintenance.

[0008] Preferably, the flow main pipe comprises an outer pipe, an inner pipe, a first exchange space and a heat dissipation fin, the inner end of the outer pipe is provided with the inner pipe, the first exchange space is 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 end of the heat dissipation fin is connected with the inner pipe, and the outer end of the heat dissipation fin extends through the outer pipe into the second exchange space.

[0009] By adopting the above technical scheme, the flowable heat exchange medium in the first exchange space can perform first heat exchange on the fluid, and the heat dissipation fin can improve the heat exchange effect on the fluid.

[0010] Preferably, the connecting mechanism comprises a connecting arm, a connecting groove and a connecting protrusion, at least two groups of connecting arms are arranged on the outer side of the flow main pipe and the flow auxiliary pipe and the inner side of the heat exchange main pipe, the other end of the connecting arm on the outer side of the flow main pipe and the inner side of the heat exchange main pipe is provided with a connecting groove, and the other end of the connecting arm on the outer side of the flow auxiliary pipe is connected with a connecting protrusion corresponding to the connecting groove.

[0011] By adopting the above technical scheme, the connecting arm can be installed or dismounted through the connecting groove and the connecting protrusion, so that the flow main pipe and the flow auxiliary pipe can be modularly dismounted and installed, and the maintenance and replacement of the flow main pipe and the flow auxiliary pipe are facilitated.

[0012] Preferably, the inner pipe comprises a base layer, an inner layer, an intermediate layer and a surface layer, the inner side of the base layer is provided with the inner layer, the inner side of the inner layer is connected with the intermediate layer, and the inner side of the intermediate layer is provided with the surface layer.

[0013] By adopting the above technical scheme, the corrosion resistance of the inner pipe can be improved through the base layer, the inner layer, the intermediate layer and the surface layer connected layer by layer, and the service life of the inner pipe is prolonged.

[0014] Preferably, the ventilation mechanism comprises an outer cover, a first ring pipe, a second ring pipe and a gas conveying pipe, one group of outer covers is connected to the front end and the rear end of the heat exchange main pipe, the transition pipes are connected with the flow main pipe and the flow auxiliary pipe through the outer covers, the outer sides of the transition pipes are provided with the first ring pipes, one group of second ring pipes is arranged on the transition pipe at the middle end and the transition pipe at the outer end, the second ring pipes are communicated with the first ring pipes, one group of gas conveying pipes is connected to the left end of the second ring pipes, and the other ends of the gas conveying pipes extend through the outer covers to the outer ends of the outer covers.

[0015] By adopting the above technical scheme, the heat exchange medium is input into the second ring pipe through the gas conveying pipe, then input into the first ring pipe from the second ring pipe, and finally input into the first exchange space, so that the preliminary heat exchange on the fluid can be realized.

[0016] Preferably, the transition pipe and the first ring pipe are provided with pipes of different sizes corresponding to the flow main pipe and the flow auxiliary pipe.

[0017] By adopting the above technical solution, the sealing and stability of the connection between the main flow pipe and the secondary flow pipe of different sizes can be achieved.

[0018] Preferably, the first ring pipe can be connected to the first exchange space.

[0019] By adopting the above technical solution, the heat exchange medium is injected into the first exchange space through the first ring pipe, which is beneficial to the heat exchange of the fluid.

[0020] Preferably, the heat dissipation fins are wavy fins, which are arranged alternately with the connecting arms.

[0021] By adopting the above technical solution, the heat exchange efficiency of the fluid inside the inner tube can be improved, and contact with the connecting arm can be avoided, ensuring stable heat exchange.

[0022] Preferably, the front end of the opening of the connecting groove is rounded, and the inner end of the connecting groove is connected to the connecting protrusion through a slot.

[0023] By adopting the above technical solutions, the stability and convenience of connecting arm connection can be improved.

[0024] Preferably, the main flow tube and the secondary flow tube are the same assembly, the size of the main flow tube is 2.5-6 times that of the secondary flow tube, and the spacing between the secondary flow tubes is 1.5-2 times the diameter of the secondary flow tube.

[0025] By adopting the above technical solutions, controlling the ratio of the main flow tube to the secondary flow tube can ensure sufficient heat transfer area, enhanced turbulence, and reasonable pressure drop. Limiting the spacing between the secondary flow tubes can ensure sufficient heat exchange of the fluid while avoiding uneven thermal field.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. The present invention provides a main flow tube and a secondary flow tube within a heat exchange tube, with at least two sets of secondary flow tubes arranged circumferentially at the outer end of the main flow tube, which can split the fluid, expand the heat exchange area between the fluid and the outside, and improve the heat exchange efficiency of the fluid.

[0028] 2. This invention achieves the connection between the heat exchange main pipe and the flow main pipe and flow secondary pipe through a connecting mechanism, realizing a modular installation effect, satisfying the modular disassembly and installation of the flow main pipe and flow secondary pipe, and facilitating the maintenance and replacement of the flow main pipe and flow secondary pipe;

[0029] 3. The present invention uses an inner tube set inside an outer tube, the inner tube including 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, thereby improving its service life. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the present invention.

[0031] Figure 2 This is a schematic diagram of the internal structure of the heat exchange main tube of the present invention.

[0032] Figure 3 This is a schematic diagram of the internal structure of the flow tube of the present invention.

[0033] Figure 4 This is a schematic diagram of the inner tube structure of the present invention.

[0034] Figure 5 for Figure 2 Enlarged structural diagram at point A in the middle.

[0035] Figure 6 This is a schematic diagram of the connection structure between the connecting groove and the connecting protrusion of the present invention.

[0036] Figure 7 This is a front view schematic diagram of the ventilation mechanism of the present invention.

[0037] Figure 8 This is a cross-sectional structural diagram of the ventilation mechanism of the present invention.

[0038] In the diagram: Heat exchange main pipe-1, ventilation mechanism-2, transition pipe-3, main body of diversion equipment-4, external pipe one-5, external pipe two-6, main flow pipe-11, connecting mechanism-12, secondary flow pipe-13, second exchange space-14, outer pipe-111, inner pipe-112, first exchange space-113, heat dissipation fins-114, connecting arm-121, connecting groove-122, connecting protrusion-123, base layer-1121, inner layer-1122, intermediate layer-1123, surface layer-1124, outer cover-21, first ring pipe-22, second ring pipe-23, gas transmission pipe-24. Detailed Implementation

[0039] To further explain the technical solution of the present invention, a detailed description is provided below through specific embodiments.

[0040] Please see Figures 1-2This invention provides a multifunctional corrosion-resistant 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 connected to a flow distribution device body 4 through a transition pipe 3. The flow distribution device body 4 can divide or merge the fluid flowing through it. A set of external pipe 1 5 is installed at the middle of the side of the two sets of flow distribution device bodies 4 away from the heat exchange main pipe 1. The external pipe 1 5 can be connected to external equipment to transport the fluid to be heat exchanged. A set of external pipe 2 6 is installed at both the front and rear ends of the left side of the heat exchange main pipe 1. The external pipe 2 6 can be connected to the second exchange space 14 to realize the flow of heat exchange medium in the second exchange space 14.

[0041] Specifically: the front-end diversion device body 4 can divert the fluid in the front-end external pipe 1 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, heat exchange medium can be injected into the second exchange space 14 through the external pipe 2 6 to help improve the heat exchange effect of the fluid. After the heat exchange is completed, the fluid merges with the rear-end diversion device body 4 through the rear-end transition pipe 3 and is output by the rear-end external pipe 1 5.

[0042] Please see Figure 2 A set of flow main pipes 11 is installed in the middle of the heat exchange main pipe 1. The outer ends of the flow main pipes 11 are connected to at least two sets of flow secondary pipes 13 through a connecting mechanism 12. The flow secondary pipes 13 are arranged circumferentially at the outer ends of the flow main pipes 11. The flow main pipes 11 and flow secondary pipes 13 are identical in components. The size of the flow main pipes 11 is 2.5-3 times that of the flow secondary pipes 13, which can ensure sufficient heat transfer area, enhanced turbulence and reasonable pressure drop. The spacing between the flow secondary pipes 13 is 1.5-2 times the diameter of the flow secondary pipes 13, which can ensure sufficient heat exchange of the fluid while avoiding uneven thermal field. The outer ends of the flow secondary pipes 13 are connected to the inner side of the heat exchange main pipe 1 through the connecting mechanism 12 for easy disassembly. The outer side of the flow main pipes 11 and flow secondary pipes 13 is the second exchange space 14. Two sets of external pipes 6 are connected to the second exchange space 14. Heat exchange medium can be injected and output into the second exchange space 14 through the two sets of external pipes 6 to improve the heat exchange effect of the fluid.

[0043] Specifically, the main flow pipe 11 and the secondary flow pipe 13 can split the fluid, expand the contact area between the fluid and the outside, improve the heat exchange efficiency, and flow the medium to the second exchange space 14 through two sets of external pipes 6 to realize the heat exchange between the internal and external media, further improving the heat exchange effect. Moreover, the main flow pipe 11 and the secondary flow pipe 13 can be modularly disassembled and installed through the connecting mechanism 12, which is convenient for maintenance.

[0044] Please see Figures 2-3The main flow tube 11 includes an outer tube 111, an inner tube 112, a first exchange space 113, and heat dissipation fins 114. The inner tube 112 is installed at the inner end of the outer tube 111. The first exchange space 113 exists between the outer tube 111 and the inner tube 112. At least two sets of heat dissipation fins 114 are provided at equal intervals in the first exchange space 113. The inner end of the heat dissipation fin 114 is fixedly connected to the inner tube 112, and the outer end extends through the outer tube 111 into the second exchange space 14. The heat dissipation fin 114 is a wavy fin, which can increase the heat dissipation area. The end of the heat dissipation fin 114 extending into the second exchange space 14 is staggered with the connecting arm 121 to avoid contact with the connecting arm 121 and ensure stable heat exchange.

[0045] Specifically, the fluid in the inner tube 112 can undergo initial heat exchange by injecting heat exchange medium into the first exchange space 113, and the heat exchange effect on the fluid can be improved by heat dissipation fins 114.

[0046] Please see 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. At least two sets of connecting arms 121 are fixedly connected to the outer sides of the main flow pipe 11 and the secondary flow pipe 13, as well as the inner side of the main heat exchange pipe 1. The other end of the connecting arm 121 on the outer side of the main flow pipe 11 and the inner side of the main heat exchange pipe 1 is provided with a connecting groove 122. The other end of the connecting arm 121 on the outer side of the secondary flow pipe 13 is fixedly connected with a corresponding connecting protrusion 123 of the connecting groove 122. The front end of the opening of the connecting groove 122 is rounded to facilitate the insertion of the connecting protrusion 123. The inner end of the connecting groove 122 is connected to the connecting protrusion 123 through a slot, which can improve the connection stability and convenience of the connecting groove 122 and the connecting protrusion 123.

[0047] Specifically, the rounded corners at the front end of the opening of the connecting protrusion 123 can improve the ease of insertion into the connecting groove 122. The slot at the inner end of the connecting groove 122 can improve the stability when connected with the connecting protrusion 123, thereby enabling the connection and fixation of the two sets of connecting arms 121. This allows for modular disassembly and installation of the main flow tube 11 and the secondary flow tube 13, which is beneficial for the maintenance and replacement of the main flow tube 11 and the secondary flow tube 13.

[0048] Please see Figure 4The inner tube 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 high-purity graphite mixed with polypropylene composite material, which retains the high thermal conductivity of graphite and utilizes the chemical corrosion resistance of polypropylene to effectively extend its service life. The inner layer 1122 is bonded to the inside of the base layer 1121. The inner layer 1122 is a resin composite coating, which can improve the bonding effect between adjacent materials. The intermediate layer 1123 is connected to the inside of the inner layer 1122. The intermediate layer 1123 is made of nano-ceramic particles, which can strengthen the strength of the inner tube 112. The surface layer 1124 is sprayed on the inside of the intermediate layer 1123. The surface layer 1124 is an ultra-thin graphene modified anti-corrosion coating with good weather resistance and thermal conductivity. It can enhance the corrosion resistance of the inner tube 112 without affecting its thermal conductivity.

[0049] Specifically, by connecting the base layer 1121, inner layer 1122, intermediate layer 1123 and surface layer 1124, the corrosion resistance of the inner tube 112 is improved and the service life of the inner tube 112 is extended.

[0050] Please see Figures 7-8 The ventilation mechanism 2 includes an outer cover 21, a first ring pipe 22, a second ring pipe 23, and a gas delivery pipe 24. The front and rear ends of the heat exchange main pipe 1 are fixedly connected to a set of outer covers 21. The transition pipe 3 is provided with corresponding large and small pipes of the flow main pipe 11 and the flow secondary pipe 13. They all pass through the outer cover 21 and are connected to the flow main pipe 11 and the flow secondary pipe 13, so that the diverted fluid can be input into the flow main pipe 11 and the flow secondary pipe 13. The outer side of the transition pipe 3 is equipped with a first ring pipe 22. The first ring pipe 22 can be connected to the first exchange space 113 to facilitate the input of heat exchange medium into the first exchange space 113. The middle transition pipe 3 and the outer transition pipe 3 are provided with a set of second ring pipes 23. The second ring pipes 23 are connected to the first ring pipes 22. The left end of the second ring pipes 23 is connected to a set of gas delivery pipes 24. The other end of the gas delivery pipes 24 extends through to the outer end of the outer cover 21.

[0051] Specifically, the heat exchange medium is introduced into the second ring pipe 23 through the front gas supply pipe 24, then into the first ring pipe 22 through the second ring pipe 23, and finally into the first exchange space 113. This assists the fluid in the inner pipe 112 in heat exchange, and the medium is output through the rear first ring pipe 22, the second ring pipe, and the gas supply pipe 24, maintaining the fluidity of the heat exchange medium and ensuring the heat exchange effect of the medium.

[0052] This invention provides a multifunctional corrosion-resistant graphite heat exchanger. A main flow tube 11 and secondary flow tubes 13 are installed within the main heat exchange tube 1. At least two sets of secondary flow tubes 13 are arranged circumferentially at the outer end of the main flow tube 11, which can divert the fluid, expand the heat exchange area between the fluid and the outside, and improve the heat exchange efficiency. A connecting mechanism 12 connects the main heat exchange tube 1 to the main flow tube 11 and secondary flow tubes 13, achieving modular installation and facilitating modular disassembly and installation of the main flow tube 11 and secondary flow tubes 13, thus simplifying maintenance and replacement. An inner tube 112 is installed within the outer tube 111. The inner tube 112 includes components such as a base layer 1121, an inner layer 1122, a middle layer 1123, and a surface layer 1124. This inner tube enhances resistance to corrosive fluids while maintaining thermal conductivity, thereby extending its service life.

[0053] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-functional anticorrosive graphite heat exchanger, characterized by: The application relates to a heat exchange device, which comprises a heat exchange main pipe (1), a group of ventilation mechanisms (2) arranged at the front and rear ends of the heat exchange main pipe (1), transition pipes (3) connected with the other ends of the two groups of ventilation mechanisms (2), a group of shunt device bodies (4) connected with the other ends of the two groups of transition pipes (3), a group of external pipes one (5) connected with the middle ends of the two groups of shunt device bodies (4) away from the heat exchange main pipe (1), and a group of external pipes two (6) connected with the left front and rear ends of the heat exchange main pipe (1). A group of flow main pipes (11) are arranged in the middle end of the heat exchange main pipe (1), the outer ends of the flow main pipes (11) are connected with not less than two groups of flow auxiliary pipes (13) through connecting mechanisms (12), the outer ends of the flow auxiliary pipes (13) are connected with the inner side of the heat exchange main pipe (1) through the connecting mechanisms (12), the outer sides of the flow main pipes (11) and the flow auxiliary pipes (13) are second exchange spaces (14), and the two groups of external pipes two (6) are communicated with the second exchange spaces (14). 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), the first exchange space (113) is arranged between the outer pipe (111) and the inner pipe (112), not less than two groups of heat dissipation fins (114) are arranged in the first exchange space (113) at equal intervals, the inner end of the heat dissipation fin (114) is connected with the inner pipe (112), and the outer end of the heat dissipation fin (114) extends to the second exchange space (14) through the outer pipe (111). The ventilation mechanism (2) comprises an outer cover (21), a first ring pipe (22), a second ring pipe (23) and a gas conveying pipe (24), the front and rear ends of the heat exchange main pipe (1) are connected with a group of outer covers (21), the transition pipes (3) are connected with the flow main pipes (11) and the flow auxiliary pipes (13) through the outer covers (21), the outer sides of the transition pipes (3) are provided with the first ring pipes (22), the middle ends of the transition pipes (3) and the outer ends of the transition pipes (3) are provided with a group of second ring pipes (23), the second ring pipes (23) are communicated with the first ring pipes (22), the left ends of the second ring pipes (23) are connected with a group of gas conveying pipes (24), and the other ends of the gas conveying pipes (24) extend to the outer ends of the outer covers (21) through penetration. The flow main pipe (11) and the flow auxiliary pipe (13) are the same in assembly, the size of the flow main pipe (11) is 2.5-3 times that of the flow auxiliary pipe (13), and the spacing between the flow auxiliary pipes (13) is 1.5-2 times the diameter of the flow auxiliary pipe (13). The flow main pipe (11) and the flow auxiliary pipe (13) perform fluid shunting.

2. The multi-functional anti-corrosion graphite heat exchanger according to claim 1, characterized in that: The connecting mechanism (12) comprises connecting arms (121), connecting grooves (122) and connecting blocks (123), the outer sides of the flow main pipe (11) and the flow auxiliary pipe (13) and the inner side of the heat exchange main pipe (1) are provided with not less than two groups of connecting arms (121), the other ends of the connecting arms (121) of the outer side of the flow main pipe (11) and the inner side of the heat exchange main pipe (1) are provided with connecting grooves (122), and the other ends of the connecting arms (121) of the outer side of the flow auxiliary pipe (13) are connected with connecting blocks (123) corresponding to the connecting grooves (122).

3. The multi-functional anti-corrosion graphite heat exchanger according to claim 1, characterized in that: The inner pipe (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 with the intermediate layer (1123), and the inner side of the intermediate layer (1123) is provided with the surface layer (1124).

4. The multi-functional anti-corrosion graphite heat exchanger according to claim 1, characterized in that: The transition pipe (3) and the first ring pipe (22) are provided with size pipes corresponding to the flow main pipe (11) and the flow auxiliary pipe (13).

5. The multi-functional anti-corrosion graphite heat exchanger according to claim 1, characterized in that: The first ring pipe (22) can communicate with the first exchange space (113).

6. The multi-functional anti-corrosion graphite heat exchanger according to claim 2, characterized in that: The heat dissipation fins (114) are wave line-shaped fins staggered with the connecting arms (121).

7. The multi-functional anti-corrosion graphite heat exchanger according to claim 2, characterized in that: The opening front end of the connecting groove (122) is provided with a round corner, and the inner end of the connecting groove (122) is connected with the connecting block (123) through a clamping groove.

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