Shell-and-tube heat exchanger

Abstract

The shell-and-tube heat exchanger comprises a heat insulation shell, the top of the heat insulation shell is provided with a liquid inlet end and a liquid outlet end, the two ends of the heat insulation shell are provided with an air outlet pipe and an air inlet pipe respectively, and the heat exchange assembly is arranged in the heat insulation shell. The invention solves the common problem that the existing shell-and-tube heat exchanger has to reduce the circulation time of gas and liquid in the tube in order to improve the heat exchange efficiency, but has to improve the circulation rate of the gas and the fluid in order to improve the work, so that the gas and the fluid can only be in the two regions in order to meet the requirement. However, a lot of heat waste is also caused.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchangers, and particularly to a shell-and-tube heat exchanger. Background Art

[0002] A shell-and-tube heat exchanger is a common heat exchange device used to transfer heat from one fluid to another. It consists of a shell and a set of internal tubes. The shell is a sealed container, usually in a cylindrical shape, and there is one or more tube bundles inside. The tube bundle contains many parallel tubes, usually with a circular cross-section. The material of the tubes is usually metal, such as stainless steel, copper or titanium. The working principle is as follows: One fluid (usually a high-temperature fluid) flows through the tubes inside the tube bundle, while another fluid (usually a low-temperature fluid) flows in the shell outside the tube bundle. Heat is transferred from the high-temperature fluid through the tube wall to the low-temperature fluid in the shell, thus achieving heat exchange. The advantages of the shell-and-tube heat exchanger include simple structure, easy maintenance and cleaning, being suitable for high-temperature and high-pressure conditions, and being able to handle large flow rates and high heat loads. It is often used in industries such as chemical engineering, petroleum, electric power, and pharmaceuticals for heat exchange processes such as heating, cooling or evaporation. Although the shell-and-tube heat exchanger is a widely used heat exchange device, it also has some heat exchange defects, including the following aspects: 1. Excessive temperature difference loss: Since heat transfer in the shell-and-tube heat exchanger is through the tube wall, the temperature difference across the tube wall has a certain impact on the heat transfer efficiency. When the temperature difference is too large, the temperature gradient on the tube wall increases, resulting in a decrease in the heat transfer efficiency. 2. Insufficient heat transfer surface area: The heat transfer surface area has a direct impact on the heat transfer efficiency. In some cases, the heat transfer surface area may be insufficient to meet the required heat transfer efficiency, thus limiting the performance of the heat exchanger;

[0003] Therefore, the existing shell-and-tube heat exchangers generally have such problems. In order to improve the heat exchange efficiency, it is necessary to reduce the flow rate of gas and liquid inside the tubes. However, in order to improve the working efficiency, it is necessary to increase the flow rate of gas and fluid. In order to meet both requirements, a compromise has to be made, but a lot of heat is still wasted. Summary of the Invention

[0004] The purpose of this part is to outline some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and title of the present application, to avoid obscuring the purpose of this part, the abstract and the title. However, such simplifications or omissions shall not be used to limit the scope of the present invention.

[0005] To solve the common problems existing in existing shell-and-tube heat exchangers, in order to improve the heat exchange efficiency, it is necessary to reduce the flow rate of gas and liquid in the tube. However, in order to improve the working efficiency, it is necessary to increase the flow rate of gas and fluid. To meet both requirements, a compromise can only be made, but this still results in a lot of heat waste. The present invention provides the following technical solutions:

[0006] A shell-and-tube heat exchanger includes a heat exchanger housing assembly, including a heat-insulating outer shell. The top of the heat-insulating outer shell is respectively provided with a liquid inlet end and a liquid outlet end, and the two ends of the heat-insulating outer shell are respectively provided with an air outlet pipe and an air inlet pipe;

[0007] A heat exchange assembly, which is arranged inside the heat-insulating outer shell.

[0008] On the basis of the above technical solution, the present invention can also be improved as follows.

[0009] As a preferred embodiment of the shell-and-tube heat exchanger of the present invention, wherein: the liquid inlet end and the liquid outlet end are respectively arranged at both ends of the top of the heat-insulating outer shell.

[0010] As a preferred embodiment of the shell-and-tube heat exchanger of the present invention, wherein: an air outlet valve is provided on the air outlet pipe, one end of the air outlet valve is connected to one end of an air outlet cone tube, the other end of the air outlet cone tube is connected to one end of the heat-insulating outer shell, an air inlet valve is provided on the air inlet pipe, one end of the air inlet valve is connected to one end of an air inlet cone tube, and the other end of the air inlet cone tube is connected to the other end of the heat-insulating outer shell.

[0011] As a preferred embodiment of the shell-and-tube heat exchanger of the present invention, wherein: a pair of support pads are provided at the bottom of the heat-insulating outer shell, and support legs are provided at the bottom of the support pads.

[0012] As a preferred embodiment of the shell-and-tube heat exchanger of the present invention, wherein: air outlet hole plates and air inlet hole plates are respectively provided at both ends of the heat-insulating outer shell, air outlet assembly holes are evenly opened on the air outlet hole plates, and air inlet assembly holes are evenly opened on the air inlet hole plates.

[0013] As a preferred embodiment of the shell-and-tube heat exchanger of the present invention, wherein: the heat exchange assembly includes a delivery air pipe, a first heat exchange half plate and a second heat exchange half plate. The delivery air pipe respectively passes through the first heat exchange half plate and the second heat exchange half plate and is connected to the air outlet assembly holes and the air inlet assembly holes on the air outlet hole plate and the air inlet hole plate.

[0014] As a preferred embodiment of the shell-and-tube heat exchanger of the present invention, wherein: the first heat exchange half plate and the second heat exchange half plate are arranged staggeredly in the heat-insulating outer shell, the number of the first heat exchange half plates and the second heat exchange half plates is several, and the numbers of both are the same.

[0015] As a preferred embodiment of the shell-and-tube heat exchanger of the present invention, the following applies: Avoidance assembly holes are equidistantly arranged on the first heat exchange half plate, and the avoidance assembly holes are cooperatively connected with the delivery gas pipe. Flow grooves are equidistantly arranged at the bottom of the first heat exchange half plate, a hollowed-out groove is arranged on the side surface of the first heat exchange half plate, and the first heat exchange half plate and the second heat exchange half plate are exactly the same.

[0016] The beneficial effects of the present invention are as follows: The two ends of the heat insulation outer shell adopt an air outlet cone tube and an air inlet vertebral tube, which greatly increases the air inlet and air outlet rates. At the same time, in order to obtain a better heat exchange effect, heat exchange grooves are arranged on the additional surface of the delivery gas pipe and heat exchange threaded grooves are arranged inside it, so that its surface has more heat exchange area. In this way, both the heat exchange power can be guaranteed and the heat exchange efficiency is increased accordingly.

[0017] The beneficial effects of the present invention are as follows: The first heat exchange half plate and the second heat exchange half plate are arranged alternately inside the heat insulation outer shell, and the liquid used for replacement will flow tortuously through the first heat exchange half plate and the second heat exchange half plate. At the same time, flow grooves are arranged at the positions where the first heat exchange half plate and the second heat exchange half plate pass through the liquid, making the fluid more fluid. At the same time, hollowed-out grooves are arranged on the side surfaces of the first heat exchange half plate and the second heat exchange half plate, making the first heat exchange half plate and the second heat exchange half plate thinner and easier to dissipate heat, and having more heat exchange surface areas, thereby increasing the heat exchange efficiency.

[0018] The beneficial effects of the present invention are as follows: Combining the effects mentioned above, the heat replacement efficiency is jointly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the following described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them:

[0020] Figure 1 It is a three-dimensional view of the whole of this embodiment.

[0021] Figure 2 It is a three-dimensional view of the air outlet disk and the air inlet disk of this embodiment.

[0022] Figure 3 It is a three-dimensional view of the heat exchange component of this embodiment.

[0023] Figure 4 It is a three-dimensional view of the delivery gas pipe of this embodiment.

[0024] Figure 5 It is a three-dimensional view of the delivery gas pipe of this embodiment.

[0025] Figure 6This is a perspective view of the heat exchange half plate of this embodiment.

[0026] Figure 7 This is a perspective view of the first heat exchange half plate of this embodiment.

[0027] Figure 8 This is a perspective view of the first heat exchange half plate of this embodiment.

[0028] In the figure: heat exchanger housing assembly 100, heat insulation outer shell 101, liquid inlet end 101a, liquid outlet end 101b, gas outlet pipe 102, gas outlet valve 102a, gas outlet conical pipe 102b, gas inlet pipe 103, gas inlet valve 103a, gas inlet vertebral pipe 103b, support backing plate 104, support leg 104a, gas outlet hole plate 102-1, gas outlet assembly hole 102-1a, gas inlet hole plate 103-1, gas inlet assembly hole 103-1a;

[0029] Heat exchange assembly 200, delivery gas pipe 201, heat exchange groove 201a, heat exchange thread groove 201b, first heat exchange half plate 202, avoidance assembly hole 202a, flow through groove 202b, hollowed out groove 202c, second heat exchange half plate 202-1. Detailed implementation manners

[0030] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following will make a detailed description of the specific implementation manners of the present invention with reference to the accompanying drawings of the specification.

[0031] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0032] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that can be included in at least one implementation manner of the present invention. The "in one embodiment" appearing in different places in this specification does not all refer to the same embodiment, nor is it an individual or selectively mutually exclusive embodiment with other embodiments.

[0033] Embodiment

[0034] Refer to Figures 1 to 8 , which is an embodiment of the present invention. This embodiment provides a shell and tube heat exchanger, as Figures 1 - 2As shown in the figure, the heat exchanger housing assembly 100 includes a heat-insulating outer shell 101. The top of the heat-insulating outer shell 101 is respectively provided with a liquid inlet end 101a and a liquid outlet end 101b. The two ends of the heat-insulating outer shell 101 are respectively provided with an air outlet pipe 102 and an air inlet pipe 103. The heat exchange assembly 200 is arranged inside the heat-insulating outer shell 101. The liquid inlet end 101a and the liquid outlet end 101b are respectively arranged at the two ends of the top of the heat-insulating outer shell 101. An air outlet valve 102a is provided on the air outlet pipe 102. The air outlet valve 102a is connected to one end of an air outlet conical pipe 102b. The other end of the air outlet conical pipe 102b is connected to one end of the heat-insulating outer shell 101. An air inlet valve 103a is provided on the air inlet pipe 103. The air inlet valve 103a is connected to one end of the air outlet conical pipe 102b. The other end of the air outlet conical pipe 102b is connected to the other end of the heat-insulating outer shell 101. A pair of support pads 104 are provided at the bottom of the heat-insulating outer shell 101. Support legs 104a are provided at the bottom of the support pads 104. Air outlet hole plates 102-1 and air inlet hole plates 103-1 are respectively provided at the two ends of the heat-insulating outer shell 101. Air outlet assembly holes 102-1a are evenly formed on the air outlet hole plates 102-1. Air inlet assembly holes 103-1a are evenly formed on the air inlet hole plates 103-1;

[0035] Thermal isolation effect: The heat-insulating outer shell 101 plays a role in heat insulation, which can effectively reduce heat dissipation and improve heat exchange efficiency. Fluid inlet and outlet control: The liquid inlet end 101a and the liquid outlet end 101b are respectively located at the two ends of the top of the heat-insulating outer shell 101. The air inlet pipe 103 and the air outlet pipe 102 are respectively located at the two ends of the heat-insulating outer shell 101. Such a design facilitates the inlet and outlet of the fluid. At the same time, the flow rate of the fluid can be controlled through the air inlet valve 103a and the air outlet valve 102a. Air outlet and air inlet connection: The air outlet valve 102a is connected to the air outlet conical pipe 102b, and the air inlet valve 103a is connected to the air outlet conical pipe 102b. Through this design, the connection of the air outlet and the air inlet can be realized, which is convenient for discharging and introducing gas to the heat exchange assembly 200. Support and stability: A pair of support pads 104 and support legs 104a are provided at the bottom of the heat-insulating outer shell 101, which can provide support and stability to ensure the stable operation of the heat exchanger housing assembly 100. Air outlet and air inlet hole plates: Air outlet hole plates 102-1 and air inlet hole plates 103-1 are respectively provided at the two ends of the heat-insulating outer shell 101. Corresponding air outlet assembly holes 102-1a and air inlet assembly holes 103-1a are formed on these hole plates for connecting other devices or pipes. Generally speaking, the normal operation of the heat exchanger housing assembly 100 and the effective control of the heat exchange process can be realized. At the same time, according to actual requirements, the heat exchanger housing assembly 100 can be further optimized and improved;

[0036] Heat-insulating outer shell 101: It is used to protect the internal components of the heat exchanger housing assembly from the influence of the external temperature. The liquid inlet end 101a and such as Figures 2 - 3As shown, the liquid outlet end 101b is respectively used for the liquid medium to enter and flow out of the heat exchanger housing assembly. The gas outlet pipe 102 and the gas inlet pipe 103 are respectively used for discharging the gas inside the heat exchanger housing assembly and introducing external gas. The heat exchange assembly 200 is installed inside the heat insulation housing 101 and is used to achieve heat exchange. The gas outlet valve 102a controls the flow of the gas in the gas outlet pipe 102. The gas outlet cone 102b is connected to the gas outlet valve 102a and is used to guide and control the gas flow direction. The gas inlet valve 103a controls the flow of the gas in the gas inlet pipe 103. The support backing plate 104 is located at the bottom of the heat insulation housing 101 and is used to provide additional support and stability. The support legs 104a are located at the bottom of the support backing plate 104 and are used to support the entire heat exchanger housing assembly. The gas outlet hole plate 102-1 and the gas inlet hole plate 103-1 are located at both ends of the heat insulation housing 101 and are used to provide channels for gas outlet and gas inlet. The gas outlet assembly holes 102-1a and the gas inlet assembly holes 103-1a are located on the gas outlet hole plate 102-1 and the gas inlet hole plate 103-1 and are used to install relevant gas outlet and gas inlet devices;

[0037] As Figures 3 - 8 As shown, the heat exchange assembly 200 is composed of a delivery gas pipe 201, a first heat exchange half plate 202, and a second heat exchange half plate 202-1. The delivery gas pipe 201 passes through the first heat exchange half plate 202 and the second heat exchange half plate 202-1 and is connected to the gas outlet assembly hole 102-1a and the gas inlet assembly hole 103-1a. The first heat exchange half plate 202 and the second heat exchange half plate 202-1 are arranged inside the heat insulation housing 101 in a staggered manner. Their numbers are several and equal. Avoidance assembly holes 202a are equidistantly arranged on the first heat exchange half plate 202 and are connected to the delivery gas pipe 201. Flow channels 202b are equidistantly arranged at the bottom of the first heat exchange half plate 202. At the same time, a hollowed-out groove 202c is arranged on the side surface of the first heat exchange half plate 202. The first heat exchange half plate 202 and the second heat exchange half plate 202-1 are exactly the same;

[0038] The first heat exchange half plate 202 and the second heat exchange half plate 202-1 are arranged inside the heat insulation housing 101 in a staggered manner. They are connected to the delivery gas pipe 201, and heat transfer is achieved through heat exchange. Avoidance assembly holes 202a are equidistantly arranged on the first heat exchange half plate 202 and are connected to the delivery gas pipe 201. These avoidance assembly holes can avoid other components or pipes to ensure the normal operation of the heat exchange component 200. At the same time, flow grooves 202b are equidistantly arranged at the bottom of the first heat exchange half plate 202 for fluid channels. Hollow grooves 202c are arranged on the side surface of the first heat exchange half plate 202. These grooves can increase the heat exchange area and improve the heat exchange efficiency. The first heat exchange half plate 202 and the second heat exchange half plate 202-1 are exactly the same, and their numbers are equal, ensuring the symmetry and balance of the heat exchange component 200. The design and components of the heat exchange component 200 can achieve the effects of heat transfer and heat exchange, improving the heat efficiency and performance of the heat exchanger housing component 100;

[0039] The two ends of the heat insulation housing 101 adopt an air outlet cone pipe 102b and an air inlet vertebral pipe 103b. The air inlet and outlet rates will increase greatly. At the same time, in order to obtain a better heat exchange effect, heat exchange grooves 201a are arranged on the additional surface of the delivery gas pipe 201 and heat exchange thread grooves 201b are arranged inside it, giving its surface more heat exchange area, which can not only ensure the heat exchange power but also increase the heat exchange efficiency;

[0040] Furthermore, by adopting an air outlet cone pipe 102b and an air inlet vertebral pipe 103b at the two ends of the heat insulation housing 101, the air inlet and outlet rates can be increased, which can effectively increase the gas flow rate in the heat exchange process and improve the heat exchange efficiency. At the same time, due to the increase in the air inlet and outlet rates, the convective heat transfer effect in the heat exchange process can also be increased. In addition, the additional heat exchange grooves 201a and heat exchange thread grooves 201b of the delivery gas pipe 201 can increase its surface area and further enhance the heat exchange effect. These grooves and thread grooves will increase the contact area between the gas and the pipe surface, thus increasing the heat transfer surface area, which can not only improve the heat exchange power but also further improve the heat exchange efficiency;

[0041] Such as Figures 4 - 8As shown, the delivery air pipe 201 is used to deliver gas through the first heat exchange half plate 202 and the second heat exchange half plate 202-1. The first heat exchange half plate 202 and the second heat exchange half plate 202-1 are used to achieve heat exchange. They are arranged staggeredly inside the heat insulation housing 101. The air outlet assembly hole 102-1a and the air inlet assembly hole 103-1a are located on the air outlet hole plate 102-1 and the air inlet hole plate 103-1 respectively, and are used to connect the delivery air pipe 201. The avoidance assembly hole 202a is located on the first heat exchange half plate 202 and is used to connect with the delivery air pipe 201 and achieve avoidance. The flow channel 202b is located at the bottom of the first heat exchange half plate 202 and is used to guide the flow of the fluid. The hollowed-out groove 202c is located on the side of the first heat exchange half plate 202 and may be used to increase the heat exchange surface area or adjust the fluid flow mode;

[0042] The first heat exchange half plate 202 and the second heat exchange half plate 202-1 are arranged alternately inside the heat insulation housing 101. The liquid used for replacement will flow tortuously through the first heat exchange half plate 202 and the second heat exchange half plate 202-1. At the same time, flow channels 202b are provided at the places where the first heat exchange half plate 202 and the second heat exchange half plate 202-1 pass through the liquid, making the fluid more fluid. At the same time, hollowed-out grooves 202c are opened on the sides of the first heat exchange half plate 202 and the second heat exchange half plate 202-1, making the first heat exchange half plate 202 and the second heat exchange half plate 202-1 thinner and easier to dissipate heat, and having more heat exchange surface area, thus increasing the heat exchange efficiency;

[0043] Furthermore, the first heat exchange half plate 202 and the second heat exchange half plate 202-1 are arranged alternately inside the heat insulation housing 101, which can make the replacement liquid flow tortuously through these heat exchange half plates, increasing the contact area during the heat exchange process, thereby improving the heat exchange efficiency. The flow channel 202b is located at the places where the first heat exchange half plate 202 and the second heat exchange half plate 202-1 pass through the liquid. It can guide the flow of the fluid, increase the fluidity of the liquid, and avoid the accumulation or dead zone of the liquid during the heat exchange process. The hollowed-out grooves 202c are located on the sides of the first heat exchange half plate 202 and the second heat exchange half plate 202-1. Their existence makes the heat exchange half plates thinner, which is beneficial to heat dissipation. At the same time, it also increases the heat exchange surface area. Thinner heat exchange half plates can conduct heat faster, and more heat exchange surface area can provide more heat exchange contact surfaces, thereby improving the heat exchange efficiency. Therefore, through these designs, the first heat exchange half plate 202 and the second heat exchange half plate 202-1 can provide a more tortuous flow path, better fluidity, and at the same time have a thinner structure and more heat exchange surface area to increase the heat exchange efficiency and heat dissipation capacity.

[0044] Importantly, it should be noted that the construction and arrangement of the present application shown in multiple different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who refer to this disclosure should easily understand that many modifications are possible without materially departing from the novel teachings and advantages of the subject matter described in this application (e.g., changes in the dimensions, scales, structures, shapes and proportions of various elements, as well as parameter values (such as temperature, pressure, etc.), installation arrangements, use of materials, colors, orientations, etc.). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature, number or position of discrete elements may be altered or changed. Accordingly, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or re-ordered according to alternative embodiments. In the claims, any "means plus function" clauses are intended to cover the structures that perform the recited functions described herein, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the present invention is not limited to specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0045] In addition, in order to provide a concise description of the exemplary embodiments, not all features of the actual embodiments may be described (i.e., those features that are not relevant to the currently contemplated best mode of carrying out the present invention, or those features that are not relevant to the implementation of the present invention).

[0046] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous specific implementation decisions may be made. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, without undue experimentation, such development efforts will be a routine task of design, fabrication and production.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention may be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A shell-and-tube heat exchanger, characterized in that: comprising, a heat exchanger housing assembly (100), including a heat-insulating outer shell (101), an inlet liquid end (101a) and an outlet liquid end (101b) are respectively provided at the top of the heat-insulating outer shell (101), and an outlet gas pipe (102) and an inlet gas pipe (103) are respectively provided at both ends of the heat-insulating outer shell (101); a heat exchange assembly (200), and the heat exchange assembly (200) is arranged inside the heat-insulating outer shell (101).

2. The shell-and-tube heat exchanger according to claim 1, characterized in that: the inlet liquid end (101a) and the outlet liquid end (101b) are respectively arranged at both ends of the top of the heat-insulating outer shell (101).

3. The shell-and-tube heat exchanger according to claim 1, characterized in that: an outlet gas valve (102a) is provided on the outlet gas pipe (102), the outlet gas valve (102a) is connected to one end of an outlet gas taper pipe (102b), the other end of the outlet gas taper pipe (102b) is connected to one end of the heat-insulating outer shell (101), an inlet gas valve (103a) is provided on the inlet gas pipe (103), the inlet gas valve (103a) is connected to one end of the outlet gas taper pipe (102b), and the other end of the outlet gas taper pipe (102b) is connected to the other end of the heat-insulating outer shell (101).

4. The shell-and-tube heat exchanger according to claim 1, characterized in that: a pair of support pads (104) are provided at the bottom of the heat-insulating outer shell (101), and support legs (104a) are provided at the bottom of the support pads (104).

5. The shell-and-tube heat exchanger according to claim 1, characterized in that: an outlet gas hole plate (102-1) and an inlet gas hole plate (103-1) are respectively provided at both ends of the heat-insulating outer shell (101), outlet gas assembly holes (102-1a) are evenly formed on the outlet gas hole plate (102-1), and inlet gas assembly holes (103-1a) are evenly formed on the inlet gas hole plate (103-1).

6. The shell-and-tube heat exchanger according to claim 1 or 5, characterized in that: the heat exchange assembly (200) includes a delivery gas pipe (201), a first heat exchange half plate (202) and a second heat exchange half plate (202-1), and the delivery gas pipe (201) respectively passes through the first heat exchange half plate (202) and the second heat exchange half plate (202-1) and is connected to the outlet gas assembly holes (102-1a) and the inlet gas assembly holes (103-1a) on the outlet gas hole plate (102-1) and the inlet gas hole plate (103-1).

7. The shell-and-tube heat exchanger according to claim 6, characterized in that: the first heat exchange half plate (202) and the second heat exchange half plate (202-1) are arranged in a staggered and aligned manner inside the heat-insulating outer shell (101), the number of the first heat exchange half plate (202) and the second heat exchange half plate (202-1) is several, and the numbers of both are the same.

8. The shell-and-tube heat exchanger according to claim 7, characterized in that: The first heat exchange half disk (202) is provided with avoidance assembly holes (202a) at equal intervals. The avoidance assembly holes (202a) are cooperatively connected with the conveying air pipe (201). The bottom of the first heat exchange half disk (202) is provided with flow channels (202b) at equal intervals. The side surface of the first heat exchange half disk (202) is provided with a hollowed-out groove (202c). The first heat exchange half disk (202) and the second heat exchange half disk (202-1) are exactly the same.

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