Heat exchanger for chemical industry

Abstract

The utility model relates to the technical field of heat exchangers, in particular to a heat exchanger for chemical engineering. Comprising a barrel, an upper end cover, a first fluid pipe, a group of heat exchange plates, a pair of second fluid connecting pipes and a second fluid drainage pipe. A containing cavity with an opening in the upper end is formed in the cylinder body, and the upper end cover covers the cylinder body. The first fluid pipe is arranged in the containing cavity and comprises a pair of first fluid connecting pipes extending out of the cylinder body. The group of heat exchange plates are arranged in the accommodating cavity at intervals along the axial direction of the cylinder body and are sleeved on the first fluid pipe; and a group of overflowing holes are formed in the plates. The pair of second fluid connecting pipes are arranged on the upper end cover at intervals and communicated with the containing cavity. And the second fluid drainage pipe penetrates through the heat exchange plate and is axially communicated with the second fluid connecting pipe. When the heat exchanger exchanges heat, the first fluid continuously flows in the barrel, the second fluid continuously flows between the heat exchange plates, and the first fluid and the second fluid exchange heat through the heat exchange plates. A spiral runner is arranged in the first fluid pipe, the flowing time of the first fluid is prolonged, and the heat transfer efficiency is improved. The structure design is simple, the manufacturing cost is low, and the size is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a heat exchanger for chemical industry. Background Art

[0002] A heat exchanger is an energy-saving device that transfers heat between two or more fluids at different temperatures. It transfers heat from a higher-temperature fluid to a lower-temperature fluid, bringing the fluid temperature to the specified process temperature to meet process requirements. It is also a key device for improving energy efficiency. Heat exchangers play a vital role in the chemical, petroleum, power, food, and many other industrial processes. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators, and reboilers, enjoying widespread applications.

[0003] In existing heat exchangers used in chemical industry, heat dissipation fins or heat sinks are generally fixed on the outer wall of the heat exchange feed pipe. In order to ensure that the material flowing inside can be thoroughly heat exchanged, the heat exchange feed pipe needs to be bent and coiled to increase the heat exchange effect. Such a design not only leads to high manufacturing costs and excessively large volume of the heat exchanger, but also makes it difficult to achieve the expected heat exchange effect. Utility Model Content

[0004] In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides a heat exchanger for chemical industry, which solves the technical problems of high manufacturing cost, large volume and poor heat exchange effect of heat exchangers.

[0005] In order to achieve the above purpose, the present invention is implemented through the following technical solutions:

[0006] A heat exchanger for chemical use comprises: a cylinder, a cavity with an upper end opening is provided in the cylinder; an upper end cover, the upper end cover is arranged on the cylinder; a first fluid pipe, the first fluid pipe is arranged in the cavity, the first fluid pipe comprises a pair of first fluid connecting pipes, the pair of first fluid connecting pipes extend out of the outside of the cylinder; a group of heat exchange plates, a group of the heat exchange plates are arranged in the cavity at intervals along the axial direction of the cylinder, a group of the heat exchange plates are sleeved on the first fluid pipe, a group of flow holes are provided on the heat exchange plates, a group of the flow holes are arranged at intervals on the heat exchange plates; a pair of second fluid connecting pipes, a pair of the second fluid connecting pipes are arranged at intervals on the upper end cover, and a pair of the second fluid connecting pipes are connected to the cavity; a second fluid drainage pipe, the second fluid drainage pipe is passed through a group of heat exchange plates, and the second fluid drainage pipe is axially connected to the second fluid connecting pipe.

[0007] Based on the above structure, the principle of the chemical heat exchanger is: it is used to realize heat transfer between the first fluid and the second fluid of different temperatures, and the first fluid and the second fluid of different temperatures are respectively injected through the corresponding first fluid connecting pipe and the second fluid connecting pipe, the first fluid enters the first fluid pipe, and the second fluid enters the volume through the second fluid connecting pipe provided on the upper end cover, and the second fluid falls from the uppermost heat exchange plate through a group of flow holes in sequence. Since a group of heat exchange plates are sleeved on the first fluid pipe and there is a temperature difference between the first fluid and the second fluid, the temperature of the first fluid will be transferred to a group of heat exchange plates through the first fluid pipe. In this process, the second fluid falls from top to bottom on a group of heat exchange plates in sequence. Due to the existence of the temperature difference, the two realize heat exchange; the second fluid is discharged from the cylinder through the second fluid drainage pipe provided in the volume cavity in conjunction with the second fluid connecting pipe.

[0008] Furthermore, in a heat exchanger for chemical use in the present application, the first fluid pipe is U-shaped, and the first fluid pipe includes: a pair of vertical pipes and an arc-shaped pipe, the arc-shaped pipe and the pair of vertical pipes are both arranged in a cavity, the two ends of the arc-shaped pipe are respectively connected to a pair of vertical pipes, the pair of vertical pipes are both passed through a group of heat exchange plates, and the ends of the pair of vertical pipes away from the arc-shaped pipes are respectively connected to a pair of first fluid connecting pipes. As a preferred embodiment of the present application, the first fluid pipe in a heat exchanger for chemical use in the present application is U-shaped, and the arc-shaped pipe can effectively buffer the impact force of the first fluid caused by pressure changes, thereby reducing the occurrence of water hammer; at the same time, it can make the first fluid form a complex flow path in the first fluid pipe, increase the disturbance degree of the first fluid, and thus improve the heat exchange efficiency; the design of the U-shaped structure reduces the length of the first fluid pipe and the number of elbows, thereby saving materials and installation space, and reducing manufacturing costs.

[0009] Furthermore, in a heat exchanger for chemical use in the present application, a pair of vertical pipes are provided with spiral flow channels, the spiral flow channels extend in a continuous spiral shape along the extension direction of the vertical pipe, and the spiral flow channels connect the first fluid connecting pipe and the arc pipe. As a preferred embodiment of the present application, a heat exchanger for chemical use in the present application, the design of the spiral flow channel is conducive to increasing the disturbance of the first fluid, the spiral flow channel causes the first fluid to rotate during the flow process, forming a complex flow field structure, this rotational motion continuously mixes and stirs the various parts of the first fluid, destroys the laminar boundary layer, and makes the temperature distribution inside the first fluid more uniform, thereby greatly enhancing the heat transfer and mass transfer effects; and prolonging the contact time. When the first fluid flows along the spiral flow channel, compared with straight-line flow, its travel in the vertical pipe is longer, and the contact time with the vertical pipe wall is increased, which provides more sufficient time for heat transfer and further improves the efficiency of heat transfer.

[0010] Furthermore, in a chemical heat exchanger of the present application, a group of protrusions corresponding to a group of flow holes are further provided on the heat exchange plate, the group of protrusions being spaced apart on the heat exchange plate, and the group of protrusions and the group of flow holes being spaced apart along the radial direction of the cylinder. As a preferred embodiment of the present application, in a chemical heat exchanger of the present application, the flow holes are used to guide the second fluid from the upper heat exchange plate to the lower heat exchange plate; the protrusions are designed so that when the second fluid flows through the group of protrusions, the protrusions create a turbulent effect on the second fluid, thereby increasing the flow time of the second fluid on the heat exchange plate, enhancing the heat exchange effect, and improving the heat exchange efficiency.

[0011] Furthermore, in a chemical heat exchanger in the present application, the flow holes on a pair of upper and lower adjacent heat exchange plates are staggered. As a preferred embodiment of the present application, in a chemical heat exchanger in the present application, the flow holes on the upper and lower adjacent heat exchange plates are staggered. Such a design is conducive to making the flow path of the second fluid complicated. When the second fluid flows on the upper heat exchange plate, it flows to the lower heat exchange plate through a group of flow holes set in this layer. The second fluid first flows in the area where the convex portion of the lower heat exchange plate is provided, and then flows to the area where the flow holes are provided and flows down to the lower layer, repeating the above flow path. The flow path of the second fluid between the adjacent pair of heat exchange plates is S-shaped, which not only increases the turbulence of the second fluid, but also significantly enhances the heat transfer effect of the second fluid in the turbulent state, and also improves the heat exchange efficiency, so that heat is transferred faster between fluids.

[0012] Furthermore, in a heat exchanger for chemical use in the present application, a limiting portion is provided on the side of the upper end cover near the cylinder, the limiting portion extends into the cavity, the limiting portion abuts against the inner wall of the cavity in the radial direction of the cavity, and a first notch is provided on the side of the limiting portion near the inner wall of the cavity, the first notch is provided along the extension direction of the limiting portion. As a preferred embodiment of the present application, in a heat exchanger for chemical use in the present application, when the upper end cover is provided on the cylinder, the limiting portion is used to limit the upper end cover in the radial direction of the cylinder to prevent the upper end cover from moving off the cylinder during use; the first notch is designed to facilitate the assembly and installation of the upper end cover and the cylinder.

[0013] Furthermore, in a heat exchanger for chemical use in the present application, a fitting portion corresponding to the outer diameter of the second fluid drainage tube is provided at the connection point between the second fluid connecting pipe and the second fluid drainage tube, the fitting portion is provided on the side of the upper end cover near the cavity, the fitting portion is provided on the side near the second fluid drainage tube, and the second notch is provided along the circumference of the second fluid drainage tube. As a preferred embodiment of the present application, in a heat exchanger for chemical use in the present application, when the upper end cover is provided on the cylinder, the fitting portion is provided on one end of the second fluid drainage tube near the upper end cover, the second fluid drainage tube and the fitting portion abut against each other in the radial direction of the second fluid drainage tube; the second notch is designed to facilitate the fitting and connection between the second fluid connecting pipe and the second fluid drainage tube.

[0014] Furthermore, in the chemical heat exchanger of the present application, a pair of the first fluid connecting pipe and the second fluid connecting pipe are each provided with a connecting portion at one end away from the barrel, and the connecting portion is used for connecting an external pipeline. As a preferred embodiment of the present application, in the chemical heat exchanger of the present application, the connecting portion is used for connecting an external pipeline to ensure a reliable connection between the heat exchanger and the pipeline.

[0015] Furthermore, the chemical heat exchanger of the present application further includes: an insulation layer, wherein a housing cavity is provided on the side wall of the cylinder, the housing cavity being closed along the circumference of the cylinder, and the housing cavity is used to accommodate the insulation layer. As a preferred embodiment of the present application, the chemical heat exchanger of the present application is configured such that substantially no heat is exchanged with the external environment during the heat exchange between the first fluid and the second fluid in the heat exchanger, thereby further improving heat exchange performance and efficiency.

[0016] It can be seen from the above technical solution that the utility model has the following beneficial effects:

[0017] The utility model provides a heat exchanger for chemical industry, which has a first fluid pipe and a group of heat exchange plates arranged in a cavity. During the heat exchange process, the first fluid flows continuously in the cylinder, and the second fluid flows continuously between the group of heat exchange plates. The group of heat exchange plates are sleeved on the first fluid pipe at intervals to realize heat exchange between the first fluid and the second fluid; a spiral flow channel is provided in the first fluid pipe, which prolongs the flow time of the first fluid in the first fluid pipe, further improving the heat transfer efficiency; and the heat exchanger has a simple structural design, which reduces the manufacturing cost and the volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of a heat exchanger for chemical industry in an embodiment of the present application;

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of a middle cylinder of a chemical heat exchanger in an embodiment of the present application;

[0020] Figure 3 This is a plan view of a heat exchanger for chemical industry in an embodiment of the present application;

[0021] Figure 4 for Figure 3 Middle AA section plan;

[0022] Figure 5 for Figure 3 Middle BB section plan;

[0023] Figure 6 for Figure 5 A partial enlarged view of the area A in the middle circle;

[0024] Figure 7 for Figure 4 A partial enlarged view of the area in the middle circle B.

[0025] In the figure: 1-cylinder; 10-cavity; 11-accommodating chamber; 2-upper end cover; 21-limiting part; 210-first notch; 3-first fluid pipe; 30-first fluid connecting pipe; 31-spiral flow channel; 32-vertical pipe; 33-arc pipe; 4-heat exchange plate; 40-flow hole; 41-convex part; 5-second fluid connecting pipe; 6-second fluid drainage pipe; 7-fitting part; 70-second notch; 8-connecting part; 9-insulation layer. DETAILED DESCRIPTION

[0026] like Figure 1 、 2 As shown in , 3, 4, and 5, a chemical heat exchanger comprises: a cylinder 1, wherein the cylinder 1 is provided with a cavity 10 with an upper end opening; an upper end cover 2, wherein the upper end cover 2 is covered on the cylinder 1; a first fluid pipe 3, wherein the first fluid pipe 3 is arranged in the cavity 10, and the first fluid pipe 3 includes a pair of first fluid connecting pipes 30, and the pair of first fluid connecting pipes 30 extend out of the outside of the cylinder 1; a group of heat exchange plates 4, wherein a group of the heat exchange plates 4 are arranged in the cavity 10 axially at intervals along the cylinder 1, and a group of the heat exchange plates 4 are sleeved on the first fluid pipe 3, and the heat exchange plates 4 are provided with a group of flow holes 40, and a group of the flow holes 40 are arranged at intervals on the heat exchange plates 4; a pair of second fluid connecting pipes 5, wherein a pair of the second fluid connecting pipes 5 are arranged at intervals on the upper end cover 2, and the pair of the second fluid connecting pipes 5 are connected with the cavity 10; a second fluid drainage pipe 6, wherein the second fluid drainage pipe 6 passes through a group of heat exchange plates 4, and the second fluid drainage pipe 6 is axially connected with the second fluid connecting pipe 5.

[0027] Based on the above structure, the principle of the chemical heat exchanger is as follows: the chemical heat exchanger of the present application is used to realize heat transfer between a first fluid and a second fluid at different temperatures, and the first fluid and the second fluid at different temperatures are respectively injected through the corresponding first fluid connecting pipe 30 and the second fluid connecting pipe 5, the first fluid enters the first fluid pipe 3, and the second fluid enters the cavity 10 through the second fluid connecting pipe 5 provided on the upper end cover 2, and the second fluid falls from the uppermost heat exchange plate 4 through a group of flow holes 40 in sequence. Since a group of heat exchange plates 4 are sleeved on the first fluid pipe 3 and there is a temperature difference between the first fluid and the second fluid, the temperature of the first fluid will be transferred to the group of heat exchange plates 4 through the first fluid pipe 3. In this process, the second fluid falls from top to bottom in a group of heat exchange plates 4 in sequence. Due to the existence of the temperature difference, the two realize heat exchange; the second fluid is discharged from the cylinder 1 through the second fluid drainage pipe 6 provided in the cavity 10 in conjunction with the second fluid connecting pipe 5. The cylinder 1 is cylindrical, and a group of heat exchange plates 4 has eight heat exchange plates 4 , which radially extend to the inner wall of the cavity 10 . A pair of first fluid connecting pipes 30 are installed at intervals on the outer bottom of the cylinder 1 .

[0028] In this embodiment, the first fluid pipe 3 is U-shaped and includes: a pair of vertical pipes 32 and an arc-shaped pipe 33. The arc-shaped pipe 33 and the pair of vertical pipes 32 are both arranged in the cavity 10. The two ends of the arc-shaped pipe 33 are respectively connected to the pair of vertical pipes 32. The pair of vertical pipes 32 are both passed through a group of heat exchange plates 4. The ends of the pair of vertical pipes 32 away from the arc-shaped pipe 33 are respectively connected to a pair of first fluid connecting pipes 30. The first fluid pipe 3 has a U-shaped structure. The arc-shaped pipe 33 can effectively buffer the impact force generated by the pressure change of the first fluid, thereby reducing the occurrence of water hammer. At the same time, it can form a complex flow path for the first fluid in the first fluid pipe 3, increase the disturbance degree of the first fluid, and thus improve the heat exchange efficiency. The U-shaped structure design reduces the length and number of elbows of the first fluid pipe 3, thereby saving materials and installation space, and reducing manufacturing costs. The first fluid pipe 3 adopts a U-shaped pipe.

[0029] In this embodiment, each of the pair of vertical tubes 32 is provided with a spiral flow channel 31. The spiral flow channel 31 extends in a continuous spiral along the extension direction of the vertical tube 32, connecting the first fluid connecting pipe 30 with the arc-shaped tube 33. The design of the spiral flow channel 31 increases the disturbance of the first fluid. The spiral flow channel 31 causes the first fluid to rotate during flow, forming a complex flow field structure. This rotational motion continuously mixes and stirs the various components of the first fluid, disrupting the laminar boundary layer and making the temperature distribution within the first fluid more uniform, thereby greatly enhancing heat and mass transfer. Furthermore, the contact time is prolonged. When the first fluid flows along the spiral flow channel 31, it travels a longer distance within the vertical tube 32 than when flowing in a straight line, increasing its contact time with the wall of the vertical tube 32. This provides more time for heat transfer and further improves heat transfer efficiency.

[0030] In this embodiment, the heat exchange plates 4 are further provided with a set of protrusions 41 corresponding to the set of flow holes 40. These protrusions 41 are spaced apart on the heat exchange plates 4, and the set of protrusions 41 and the set of flow holes 40 are radially spaced apart along the cylinder 1. The flow holes 40 are used to guide the second fluid from the upper heat exchange plates 4 to the lower heat exchange plates 4. The protrusions 41 are designed to disrupt the second fluid as it flows through the set of protrusions 41, thereby increasing the flow time of the second fluid on the heat exchange plates 4, enhancing the heat exchange effect, and improving heat exchange efficiency. The set of flow holes 40 and the set of 41 are symmetrically spaced along the radial direction of the cylinder 1.

[0031] In this embodiment, the flow holes 40 on a pair of adjacent heat exchange plates 4 are staggered. This staggered arrangement of the flow holes 40 on the upper and lower heat exchange plates 4 facilitates a more complex flow path for the second fluid. When the second fluid flows through the upper heat exchange plate 4, it flows to the lower heat exchange plate 4 through the set of flow holes 40 provided on that layer. The second fluid first flows through the area of ​​the lower heat exchange plate 4 provided with the protrusions 41, then flows to the area provided with the flow holes 40 and flows down to the lower layer, repeating this flow path. The flow path of the second fluid between the adjacent pairs of heat exchange plates 4 is S-shaped. This not only increases the turbulence of the second fluid, significantly enhancing the heat transfer effect of the second fluid under turbulent conditions, but also improves the heat exchange efficiency, allowing heat to be transferred more quickly between the fluids. The set of flow holes 40 is spaced radially along the cylinder 1, and correspondingly, the set of protrusions 41 is also spaced radially along the cylinder 1. The set of flow holes 40 and the set of protrusions 41 on the upper and lower heat exchange plates 4 correspond one-to-one in the axial direction of the cylinder 1.

[0032] like Figure 6As shown, in this embodiment, the upper end cover 2 is provided with a limiting portion 21 on the side close to the cylinder 1, and the limiting portion 21 extends into the cavity 10. The limiting portion 21 abuts against the inner wall of the cavity 10 in the radial direction of the cavity 10. The limiting portion 21 is provided with a first notch 210 on the side close to the inner wall of the cavity 10, and the first notch 210 is arranged along the extension direction of the limiting portion 21. When the upper end cover 2 is placed on the cylinder 1, the limiting portion 21 is used to limit the upper end cover 2 in the radial direction of the cylinder 1 to prevent the upper end cover 2 from moving off the cylinder 1 during use; the first notch 210 is designed to facilitate the assembly and installation of the upper end cover 2 and the cylinder 1. The limiting portion 21 is arranged closed along the circumference of the cylinder 1, and correspondingly, the first notch 210 is also arranged along the circumference of the cylinder 1.

[0033] like Figure 7 As shown, in this embodiment, the second fluid connecting pipe 5 is provided with a fitting portion 7 corresponding to the outer diameter of the second fluid drainage pipe 6 at the connection point with the second fluid drainage pipe 6. The fitting portion 7 is provided on the side of the upper end cover 2 near the accommodating cavity 10. The fitting portion 7 is provided with a second notch 70 near the second fluid drainage pipe 6. The second notch 70 is arranged along the circumference of the second fluid drainage pipe 6. When the upper end cover 2 is installed on the cylinder body 1, the fitting portion 7 is fitted over the end of the second fluid drainage pipe 6 near the upper end cover 2. The second fluid drainage pipe 6 and the fitting portion 7 abut against each other in the radial direction of the second fluid drainage pipe 6. The second notch 70 is designed to facilitate the fitting and communication between the second fluid connecting pipe 5 and the second fluid drainage pipe 6.

[0034] In this embodiment, a pair of first and second fluid connecting pipes 30 and 5 are each provided with a connection portion 8 at the end away from the barrel 1. This connection portion 8 is used for connecting external piping. This connection portion 8 is used to connect external pipelines, ensuring a secure connection between the heat exchanger and the pipeline. The connection portion 8 utilizes a flange and is welded to the corresponding first and second fluid connecting pipes 30 and 5.

[0035] This embodiment further includes an insulation layer 9. A housing cavity 11 is provided on the sidewall of the cylinder 1. This housing cavity 11 is arranged circumferentially around the cylinder 1 and is used to accommodate the insulation layer 9. The insulation layer 9 ensures that the first and second fluids in the heat exchanger are substantially free of heat exchange with the external environment, thereby further improving heat exchange performance and efficiency. The insulation layer 9 is constructed of thermal insulation cotton.

[0036] The above description of the technical principles of the present invention in conjunction with specific embodiments is intended solely to illustrate the principles of the present invention and is not to be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will be able to devise other specific implementations of the present invention without inventive effort, and such implementations will fall within the scope of protection of the present invention.

Claims

1. A heat exchanger for chemical industry, characterized by: include: A cylinder (1), wherein a cavity (10) with an upper end opening is provided in the cylinder (1); An upper end cover (2), the upper end cover (2) being arranged on the cylinder (1); A first fluid pipe (3), the first fluid pipe (3) being arranged in the cavity (10), the first fluid pipe (3) comprising a pair of first fluid connecting pipes (30), the pair of first fluid connecting pipes (30) extending out of the outside of the cylinder (1); A group of heat exchange plates (4), wherein the group of heat exchange plates (4) are arranged in the cavity (10) at intervals along the axial direction of the cylinder (1), and the group of heat exchange plates (4) are sleeved on the first fluid pipe (3), and the heat exchange plates (4) are provided with a group of flow holes (40), and the group of flow holes (40) are arranged at intervals on the heat exchange plates (4); a pair of second fluid connecting pipes (5), the pair of second fluid connecting pipes (5) being spaced apart and arranged on the upper end cover (2), and the pair of second fluid connecting pipes (5) being in communication with the cavity (10); A second fluid drainage pipe (6), the second fluid drainage pipe (6) is provided on a group of heat exchange plates (4), and the second fluid drainage pipe (6) is axially connected to the second fluid connecting pipe (5).

2. A chemical heat exchanger according to claim 1, characterized in that: The first fluid pipe (3) is U-shaped and comprises: a pair of vertical pipes (32) and an arc-shaped pipe (33). The arc-shaped pipe (33) and the pair of vertical pipes (32) are both arranged in the cavity (10). Both ends of the arc-shaped pipe (33) are respectively connected to the pair of vertical pipes (32). The pair of vertical pipes (32) are both passed through a group of heat exchange plates (4). One end of the pair of vertical pipes (32) away from the arc-shaped pipe (33) is respectively connected to a pair of first fluid connecting pipes (30).

3. A chemical heat exchanger according to claim 2, characterized in that: A spiral flow channel (31) is provided in each of the pair of vertical pipes (32). The spiral flow channel (31) extends in a continuous spiral shape along the extension direction of the vertical pipe (32). The spiral flow channel (31) connects the first fluid connecting pipe (30) and the arc-shaped pipe (33).

4. The chemical heat exchanger according to claim 1, characterized in that: The heat exchange plate (4) is further provided with a group of protrusions (41) corresponding to the group of flow holes (40), the group of protrusions (41) are arranged at intervals on the heat exchange plate (4), and the group of protrusions (41) and the group of flow holes (40) are arranged at intervals along the radial direction of the cylinder (1).

5. A chemical heat exchanger according to claim 4, characterized in that: The flow holes (40) on a pair of upper and lower adjacent heat exchange plates (4) are arranged in a staggered manner.

6. The chemical heat exchanger according to claim 1, characterized in that: A limiting portion (21) is provided on a side of the upper end cover (2) near the cylinder (1), and the limiting portion (21) extends into the cavity (10). The limiting portion (21) abuts against the inner wall of the cavity (10) in the radial direction of the cavity (10). A first notch (210) is provided on a side of the limiting portion (21) near the inner wall of the cavity (10), and the first notch (210) is arranged along the extension direction of the limiting portion (21).

7. The chemical heat exchanger according to claim 1, characterized in that: A sleeve portion (7) corresponding to the outer diameter of the second fluid drainage tube (6) is provided at the connection point between the second fluid connecting pipe (5) and the second fluid drainage tube (6); the sleeve portion (7) is provided on the side of the upper end cover (2) close to the cavity (10); a second notch (70) is provided on the side of the sleeve portion (7) close to the second fluid drainage tube (6); and the second notch (70) is provided along the circumference of the second fluid drainage tube (6).

8. The chemical heat exchanger according to claim 1, characterized in that: A pair of the first fluid connecting pipe (30) and the second fluid connecting pipe (5) are both provided with a connecting portion (8) at one end away from the cylinder (1), and the connecting portion (8) is used for external piping.

9. The chemical heat exchanger according to claim 1, characterized in that: Also includes: The heat-insulating layer (9) is provided with a receiving cavity (11) on the side wall of the cylinder (1), and the receiving cavity (11) is closed and arranged along the circumference of the cylinder (1). The receiving cavity (11) is used to receive the heat-insulating layer (9).

Images