A detachable tube-shell heat exchanger

Abstract

The utility model discloses a detachable pipe shell type heat exchanger, including shell type heat exchanger and the heat exchange pipe group of setting inside shell type heat exchanger and horizontal arrangement, the both ends of heat exchange pipe group are located in the casing and are provided with front pipe plate and rear pipe plate respectively, and the pipe hole of this front pipe plate and rear pipe plate inserts into the heat exchange pipe of heat exchange pipe group respectively and fixes, divides the casing into the shell layer passageway of middle part and the pipe layer area of both sides, the pipe layer inlet pipe and pipe layer outlet pipe who respectively communicates with the pipe layer area of both sides are provided with respectively in the left and right ends of casing, are used for introducing and discharging cooling water to the shell layer inlet pipe and shell layer outlet pipe who communicate with shell layer passageway are provided with respectively in the upper and lower sides of casing, are used for introducing and discharging compressor hot air. The utility model discloses whole through multiple flange structure not only convenient to dismount maintenance, but also can adjust length and promote heat exchange efficiency, and the pipe layer fluid flexible control is realized to the pipe, and the baffle strengthens heat exchange, effectively solves the deficiency of traditional heat exchanger.

Description

Technical Field

[0001] This utility model belongs to the field of heat exchanger technology and relates to a detachable shell-and-tube heat exchanger. Background Technology

[0002] Shell-and-tube heat exchangers, due to their relatively simple structure and stable operation, are widely used in many industrial fields such as chemical, power, and refrigeration to achieve heat exchange between different fluids. In compressor systems, shell-and-tube heat exchangers are often used to cool interstage hot air and recover heat to improve system energy efficiency. However, existing shell-and-tube heat exchangers have many shortcomings.

[0003] On the one hand, the fluid flow paths in the tube layer and shell layer are relatively fixed, making it difficult to flexibly control the fluid in the tube layer. In actual compressor operation, the operating conditions are complex and variable. For example, when adjusting the load, it is necessary to precisely adjust or divert the cooling water flow rate in the tube layer to optimize heat exchange efficiency. However, traditional heat exchangers cannot easily draw out the liquid in the tube layer and cannot respond to changes in operating conditions in a timely manner, resulting in insufficient cooling of hot air and low heat recovery efficiency.

[0004] On the other hand, traditional heat exchangers are extremely inconvenient to disassemble and maintain. The hot air between compressor stages may carry impurities, which, after prolonged operation, will form scale on the heat exchanger shell and tube surfaces, affecting heat exchange efficiency. Since traditional heat exchangers are mostly integral structures, disassembly and cleaning require a significant amount of time and manpower, and frequent disassembly can damage easily damaged components. Furthermore, their sealing structure is prone to failure under thermal expansion and contraction, leading to hot air leakage, which reduces heat recovery efficiency and poses safety hazards.

[0005] Therefore, there is an urgent need to design a detachable shell-and-tube heat exchanger to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a simple, reasonable, practical, safe, and stable detachable shell-and-tube heat exchanger. This invention achieves flexible bypass drainage of the tube layer liquid by setting multiple flange connections on the shell and adding multiple sets of connecting pipes leading out from the tube layer. Simultaneously, the length of the heat exchanger can be flexibly adjusted by changing the number of flanges, thereby improving the heat exchange efficiency between the shell-layer hot air and the tube-layer cooling water, and facilitating the disassembly and maintenance of the heat exchanger, thus enhancing its flexibility and adaptability.

[0007] This utility model is achieved through the following technical solution: a detachable shell-and-tube heat exchanger, comprising a shell-and-tube heat exchanger and a heat exchange tube assembly arranged horizontally inside the shell-and-tube heat exchanger. The two ends of the heat exchange tube assembly are respectively provided with a front tube sheet and a rear tube sheet inside the shell. The tube holes of the front tube sheet and the rear tube sheet are respectively inserted into the heat exchange tubes of the heat exchange tube assembly for fixation, dividing the interior of the shell into a shell layer channel in the middle and tube layer areas on both sides. Tube layer inlet pipes and tube layer outlet pipes communicating with the tube layer areas on both sides are respectively provided at the left and right ends of the shell for introducing and discharging cooling water. Shell layer inlet pipes and shell layer outlet pipes communicating with the shell layer channel are respectively provided on the upper and lower sides of the shell for introducing and discharging compressor hot air.

[0008] Preferably, at least one set of flange plates is welded to the side of the shell between the shell inlet pipe and the shell outlet pipe. A pipe outlet branch pipe is installed on each set of flange plates. One end of the pipe outlet branch pipe is connected to the inside of the pipe channel, and the other end extends to the outside of the shell, so as to cooperate with the pipe outlet pipe to achieve more flexible heat exchange control.

[0009] Preferably, the outlet branch pipe of the pipe layer is connected and fixed to the flange plate by bolts and nuts, so that the outlet branch pipe of the pipe layer and the flange plate are detachable, which facilitates installation and maintenance. In addition, a sealing gasket is provided at the connection between the outlet branch pipe of the pipe layer and the flange plate to improve the overall airtightness.

[0010] Preferably, the tube holes of the front tube sheet and the rear tube sheet are fixedly connected to the heat exchange tubes of the heat exchange tube assembly by expansion or welding, and a sealing ring is provided at the connection to ensure the airtightness of the tube layer channel.

[0011] Preferably, the shell channel of the shell is provided with multiple vertically arranged baffles, each baffle being the same size and equidistant from each other, and each baffle having a height less than the height of the shell channel, which are used to support the heat exchange tube assembly, change the flow path of hot air, and increase the residence time of hot air in the shell.

[0012] Preferably, the two adjacent baffles are arranged in an alternating vertical arrangement to form an S-shaped airflow channel inside the shell channel, which improves the heat exchange effect.

[0013] Preferably, the shell is a cylindrical structure made of corrosion-resistant and high-temperature-resistant stainless steel, and the heat exchange tube is made of copper.

[0014] The beneficial effects of this utility model are as follows: 1) This utility model, by setting a branch plate between the flange plates, can conveniently draw out the liquid in the pipe layer for bypass treatment. When the compressor operating conditions change, the cooling water flow rate of the pipe layer can be flexibly adjusted or diverted to meet the special needs of the pipe layer fluid under different operating conditions, improve the flexibility and adaptability of the heat exchanger, and thus improve the efficiency of hot air cooling and heat recovery.

[0015] 2) This utility model facilitates the adjustment of heat exchange efficiency: By adjusting the number of flanges, the length of the heat exchanger can be flexibly adjusted. Increasing the number of flanges increases the length of the heat exchanger, thereby increasing the contact area and contact time between the shell hot air and the tube cooling water, effectively improving the heat exchange efficiency; reducing the number of flanges allows for flexible reduction of equipment size according to actual needs, adapting to the heat exchange efficiency requirements of different operating conditions.

[0016] 3) This utility model facilitates disassembly and maintenance: The shell adopts a flange structure connection. When a fault occurs inside the heat exchanger or cleaning and maintenance are required, the shell can be disassembled simply by removing the bolts and nuts. This allows for convenient and quick inspection, cleaning, or replacement of internal components such as heat exchange tubes, tube sheets, and baffles, reducing maintenance costs and time, minimizing downtime caused by equipment maintenance, and improving production efficiency.

[0017] 4) This utility model has high heat exchange efficiency: the shell layer carries hot air from the compressor, the tube layer carries cooling water, and the baffle plate further optimizes the flow path of the hot air, making full use of the temperature difference between the two fluids to achieve efficient heat exchange and improve the heat exchange efficiency of the heat exchanger.

[0018] 5) The present invention has good sealing performance: the flange connection is sealed by sealing gaskets, etc., which effectively prevents fluid leakage between the pipe layer and the shell layer, ensures the sealing performance and stability of the heat exchanger during operation, and avoids the reduction of heat recovery efficiency and safety problems caused by fluid leakage. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the structure of the outlet branch pipe of the middle pipe layer of this utility model. Detailed Implementation

[0021] To enable those skilled in the art to more clearly understand the purpose, technical solution and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "horizontal", and "vertical" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] The present invention will now be described in detail with reference to the accompanying drawings: Figure 1 As shown, a detachable shell-and-tube heat exchanger includes a shell-and-tube heat exchanger and a heat exchange tube assembly 10 arranged horizontally inside the shell-and-tube heat exchanger. The two ends of the heat exchange tube assembly 10 are respectively provided with a front tube sheet 7 and a rear tube sheet 8 inside the shell 1. The tube holes of the front tube sheet 7 and the rear tube sheet 8 are respectively inserted into the heat exchange tubes of the heat exchange tube assembly 10 for fixation, dividing the interior of the shell 1 into a shell layer channel in the middle and tube layer areas on both sides. Tube layer inlet pipe 2 and tube layer outlet pipe 3 are respectively provided at the left and right ends of the shell 1, which are connected to the tube layer areas on both sides, for introducing and discharging cooling water. Shell layer inlet pipe 4 and shell layer outlet pipe 5 are respectively provided on the upper and lower sides of the shell 1, which are connected to the shell layer channel, for introducing and discharging compressor hot air.

[0024] like Figure 2 As shown, at least one set of flange plates 11 are welded to the side of the shell 1 between the shell inlet pipe 4 and the shell outlet pipe 5. A pipe outlet branch pipe 6 is installed on each set of flange plates 11. One end of the pipe outlet branch pipe 6 is connected to the inside of the pipe channel, and the other end extends to the outside of the shell 1, which is used to cooperate with the pipe outlet pipe 3 to achieve more flexible heat exchange control.

[0025] The outlet branch pipe 6 of the pipe layer is connected and fixed to the flange plate 11 by bolts 13 and nuts 12, so that the outlet branch pipe 6 of the pipe layer and the flange plate 11 are detachable, which facilitates installation and maintenance. A sealing gasket 14 is provided at the connection between the outlet branch pipe 6 of the pipe layer and the flange plate 11 to improve the overall airtightness.

[0026] The tube holes of the front tube sheet 7 and the rear tube sheet 8 are fixedly connected to the heat exchange tubes of the heat exchange tube group 10 by expansion or welding. A sealing ring is provided at the connection to ensure the airtightness of the tube layer channel.

[0027] The shell 1 has multiple vertically arranged baffles 9 inside the shell channel. Each baffle 9 is the same size and equidistant from each other, and its height is less than the height of the shell channel. They are used to support the heat exchange tube assembly 10, change the flow path of hot air, and increase the residence time of hot air in the shell.

[0028] This invention incorporates baffles installed within the shell-type channels. These baffles are of a specific shape, and their number and spacing are designed and arranged according to actual heat exchange requirements. The baffles alter the flow path of hot air, increasing its residence time within the shell and promoting full contact between the hot air and the cooling water in the heat exchange tubes. This enhances the heat exchange effect and further improves the overall heat exchange performance of the heat exchanger.

[0029] The two adjacent baffles 9 are arranged in a staggered pattern, forming an S-shaped airflow channel inside the shell channel to improve heat exchange efficiency. The shell 1 is a cylindrical structure made of corrosion-resistant and high-temperature-resistant stainless steel, and the heat exchange tubes are made of copper.

[0030] In actual use, the compressor's hot air enters the shell channel from the shell inlet pipe 4, changes its flow path under the action of the baffle plate 9, and fully exchanges heat with the cooling water in the heat exchange tube 10. Then, the hot air is discharged from the shell outlet pipe 5. The cooling water enters the tube channel from the tube inlet pipe 2, absorbs heat from the hot air in the shell during its flow in the heat exchange tube, and is then discharged from the tube outlet pipe 3.

[0031] When bypass treatment of the tube layer liquid is required, the tube layer liquid can be led out of the shell 1 through the tube layer outlet branch pipe 6, realizing flexible control of the tube layer fluid. When the heat exchange efficiency needs to be adjusted, the number of flange plates can be increased or decreased according to actual needs, thereby adjusting the length of the heat exchanger. When the heat exchanger needs maintenance or repair, the corresponding bolts 13 and nuts 12 can be removed, and the flange connection of the shell can be disassembled to inspect, clean, or replace internal components such as heat exchange tubes 10, front tube sheet 7, rear tube sheet 8, and baffles 9.

[0032] This utility model, with its multi-flange structure, not only facilitates disassembly and maintenance but also allows for length adjustment to improve heat exchange efficiency. The connecting pipe enables flexible control of the fluid in the pipe layer, and the baffle plate enhances heat exchange, effectively solving the shortcomings of traditional heat exchangers. It has advantages such as high flexibility, high-efficiency heat exchange, and good sealing performance.

[0033] The specific embodiments described herein are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A detachable shell-and-tube heat exchanger, comprising a shell-and-tube heat exchanger and a horizontally arranged heat exchange tube assembly (10) disposed inside the shell-and-tube heat exchanger, characterized in that: The heat exchange tube assembly (10) has a front tube plate (7) and a rear tube plate (8) respectively located inside the shell (1). The tube holes of the front tube plate (7) and the rear tube plate (8) are inserted into the heat exchange tubes of the heat exchange tube assembly (10) for fixation, dividing the interior of the shell (1) into a shell layer channel in the middle and tube layer areas on both sides. Tube layer inlet pipe (2) and tube layer outlet pipe (3) are respectively provided at the left and right ends of the shell (1) and are respectively connected to the tube layer areas on both sides for introducing and discharging cooling water. On the upper and lower sides of the shell (1), a shell layer inlet pipe (4) and a shell layer outlet pipe (5) are respectively provided and are connected to the shell layer channel for introducing and discharging compressor hot air.

2. The detachable shell-and-tube heat exchanger according to claim 1, characterized in that: At least one set of flange plates (11) are welded between the shell inlet pipe (4) and the shell outlet pipe (5) on the side of the shell (1). A pipe outlet branch pipe (6) is installed on each set of flange plates (11). One end of the pipe outlet branch pipe (6) is connected to the inside of the pipe channel, and the other end extends to the outside of the shell (1) to cooperate with the pipe outlet pipe (3) to achieve more flexible heat exchange control.

3. The detachable shell-and-tube heat exchanger according to claim 2, characterized in that: The outlet branch pipe (6) of the pipe layer is connected and fixed to the flange plate (11) by bolts (13) and nuts (12), so that the outlet branch pipe (6) of the pipe layer and the flange plate (11) are detachable, which facilitates installation and maintenance. A sealing gasket (14) is provided at the connection between the outlet branch pipe (6) of the pipe layer and the flange plate (11) to improve the overall airtightness.

4. The detachable shell-and-tube heat exchanger according to claim 1 or 3, characterized in that: The tube holes of the front tube sheet (7) and the rear tube sheet (8) are fixedly connected to the heat exchange tubes of the heat exchange tube group (10) by expansion or welding. A sealing ring is provided at the connection to ensure the sealing of the tube layer channel.

5. The detachable shell-and-tube heat exchanger according to claim 4, characterized in that: The shell (1) has multiple vertically arranged baffles (9) inside the shell channel. Each baffle (9) is the same size and is arranged at equal intervals. The height of each baffle is less than the height of the shell channel. They are used to support the heat exchange tube group (10), change the flow path of hot air and increase the residence time of hot air in the shell.

6. The detachable shell-and-tube heat exchanger according to claim 5, characterized in that: The two adjacent baffles (9) are arranged in an alternating pattern to form an S-shaped airflow channel inside the shell channel, which is used to improve the heat exchange effect.

7. The detachable shell-and-tube heat exchanger according to claim 1, characterized in that: The shell (1) is a cylindrical structure and is made of corrosion-resistant and high-temperature resistant stainless steel. The heat exchange tube is made of copper.

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