Anti-coking heat exchanger

Abstract

The utility model relates to heat exchange equipment technical field, concretely relates to a kind of anti-coking heat exchanger, including cylinder, the both ends of cylinder are equipped with opening, opening is equipped with tube sheet respectively, multiple heat exchange pipes are equipped between tube sheet, multiple baffles are uniformly spaced and arranged in cylinder, heat exchange pipe is set through baffle, one end of cylinder is equipped with tube body, and tube body is equipped with partition, and tube body is respectively equipped with the connecting pipe one of fluid delivery and discharge to heat exchange pipe, and cylinder is respectively equipped with the connecting pipe two of fluid delivery and discharge to cylinder, the other end of cylinder is equipped with rear seal tube, and the one end of tube body away from cylinder is equipped with front seal tube, and the turbulence piece that passes through heat exchange pipe is equipped between tube body and rear seal tube, and installation assembly for installing turbulence piece is equipped in tube body and rear seal tube. Fluid flows along tangential direction and radial direction simultaneously by turbulence piece, thereby effectively prevent particulate impurities from depositing in pipe wall or dead angle, reduce the occurrence of coking.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange equipment technology, and more specifically, to an anti-coking heat exchanger. Background Technology

[0002] A heat exchanger is a commonly used heat exchange device widely applied in industrial production, such as in chemical, power plant, and metallurgical industries. Its main function is to facilitate the exchange of heat between two fluids, thereby achieving energy conservation and improving efficiency.

[0003] Under certain high-temperature or impurity-containing operating conditions, coking can easily occur inside the heat exchanger. Particles, dust, or oil in the heat medium can adhere to the heat exchange surface, eventually forming hard lumps. This not only affects heat exchange efficiency but may also block channels, increase equipment operating resistance, and even cause malfunctions, thus requiring improvement. Summary of the Invention

[0004] The purpose of this invention is to provide an anti-coking heat exchanger to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A coking-resistant heat exchanger includes a cylindrical body with openings at both ends. Tube sheets are installed at the openings, and multiple heat exchange tubes are arranged between the tube sheets. Multiple baffles are evenly spaced within the cylindrical body, through which the heat exchange tubes pass. A tube body is located at one end of the cylindrical body, with a partition plate inside. A first connecting pipe for supplying and discharging fluid to the heat exchange tubes is installed on the tube body, and a second connecting pipe for supplying and discharging fluid to the cylindrical body is installed on the cylindrical body. A rear sealing pipe is located at the other end of the cylindrical body, and a front sealing pipe is located at the end of the tube body furthest from the cylindrical body. A baffle plate passing through the heat exchange tubes is provided between the tube body and the rear sealing pipe. An installation assembly for mounting the baffle plate is provided inside the tube body and the rear sealing pipe. Support plates are arranged opposite each other on the cylindrical body, and a striking assembly is provided between the support plates.

[0007] Furthermore, the mounting assembly includes circular plates respectively disposed in the tube body and the rear sealing tube. The circular plates are provided with multiple insertion holes corresponding to the heat exchange tubes. The circular plate in the rear sealing tube is provided with a cover corresponding to the insertion holes. The circular plate in the tube body is provided with a through pipe corresponding to the insertion holes. The through pipe is provided with a threaded cap.

[0008] Furthermore, insert posts are provided at both ends of the spoiler.

[0009] Furthermore, the striking assembly includes a fixed plate disposed between the support plates, with opposing upright blocks on the fixed plate, a groove inside the upright block, a sliding column inside the groove, a striking hemisphere between the upright blocks, a top rod on the striking hemisphere, a crossbar extending from the groove and connected to the top rod on the sliding column, and a limiting block located below the crossbar inside the groove.

[0010] Furthermore, a spring for pushing the crossbar is fitted onto the sliding column.

[0011] Furthermore, a motor is provided on the fixed plate, and the output end of the motor is provided with a cam that cooperates with the push rod.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model, by placing the turbulence-inducing plate inside the heat exchange tube, can enhance fluid turbulence, reduce impurity deposition, and lower the risk of coking inside the tube.

[0014] This invention, through the design of the installation components, facilitates the quick installation and removal of the spoiler, thereby improving maintenance efficiency.

[0015] This invention, through the setting of the tapping component, can effectively remove coking or dust adhering to the inner wall of the cylinder, the outside of the heat exchange tube, or the surface of the baffle, further reducing the risk of coking. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an anti-coking heat exchanger according to the present invention.

[0017] Figure 2 This is a cross-sectional structural diagram of an anti-coking heat exchanger according to the present invention.

[0018] Figure 3 This is a schematic diagram of the structure of the baffle and the insert in this utility model.

[0019] Figure 4 This is an exploded structural diagram of the turbulence plate passing through the heat exchange tube and a cap in this utility model.

[0020] Figure 5 This is a schematic diagram showing the cross-section of the striking component and the upright block in this utility model.

[0021] The meanings of the labels in the diagram are as follows: 100, cylinder; 101, tube sheet; 102, heat exchange tube; 103, baffle plate; 104, tube body; 105, partition plate; 106, connecting pipe one; 107, connecting pipe two; 108, rear sealing pipe; 109, front sealing pipe; 110, baffle plate; 111, support plate; 200, circular plate; 201, insertion hole; 202, cover; 203, through pipe; 204, cap; 205, insertion post; 300, fixing plate; 301, vertical block; 302, sliding column; 303, striking hemisphere; 304, push rod; 305, crossbar; 306, limiting block; 307, spring; 308, motor; 309, cam. Detailed Implementation

[0022] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are merely illustrative of this utility model and are not intended to limit it.

[0023] The following is in conjunction with the appendix Figures 1-5 This embodiment will be described in further detail.

[0024] Please see Figures 1-5 This embodiment of an anti-coking heat exchanger includes a cylindrical body 100 with openings at both ends. Tube sheets 101 are installed at the openings, and multiple heat exchange tubes 102 are arranged between the tube sheets 101. The heat exchange tubes 102 are arranged axially along the cylindrical body 100, passing between the tube sheets 101 at both ends, and passing through multiple baffles 103 inside the cylindrical body 100.

[0025] Among them, combined Figure 2 As shown, the baffles 103 are evenly spaced in the axial direction inside the cylinder 100, which enables the fluid inside the cylinder 100 to flow along an S-shaped path, thereby increasing the contact area between the fluid and the heat exchange tube 102 and improving the heat exchange efficiency. At the same time, it can also effectively reduce the stagnant area of ​​the fluid inside the cylinder 100 and reduce the risk of ash accumulation and coking.

[0026] In this embodiment, a tube 104 is provided at one end of the cylinder 100. The tube 104 is divided into two non-communicating cavities by a partition plate 105. The heat exchange tube 102 is connected to the corresponding cavity, so that the fluid can enter from the lower heat exchange tube 102 and then flow out from the upper heat exchange tube 102. During operation, the fluid first enters the cavity through the connecting pipe 106 at the bottom of the tube 104, and then enters the lower heat exchange tube 102. After flowing along the tube and absorbing or releasing heat, the fluid returns from the upper heat exchange tube 102 to the upper cavity in the tube 104, and is discharged through the connecting pipe 106 at the top of the tube 104. This realizes the flow mode of bottom in and top out, thereby making full use of the flow path in the heat exchange tube 102 and avoiding the decrease in thermal efficiency caused by poor flow.

[0027] In this embodiment, two connecting pipes 107, located at their respective inlet and outlet positions, are also provided on the outer wall of the cylinder 100, for conveying and discharging fluid into and out of the cylinder 100, respectively. During actual operation, another group of fluid can enter the cylinder 100 through one of the connecting pipes 107. Under the guidance of the baffle 103, it flows crisscrossingly along the path of the cylinder 100 before finally discharging through the other connecting pipe 107. During its flow, the fluid passes through the outer wall of the heat exchange tube 102 arranged in its path, exchanging heat with the fluid inside the heat exchange tube 102, thereby completing the transfer of heat energy.

[0028] Please see Figures 1-5To improve the fluid turbulence inside the heat exchange tube 102 and reduce the risk of coking, perforated baffles 110 are provided in multiple heat exchange tubes 102. Figure 2 (Only two locations are shown in the image). The two ends of the spoiler 110 are fixedly provided with inserts 205, which are respectively inserted into the mounting components at one end of the tube body 104 and one end of the rear sealing tube 108, thereby achieving fixed installation.

[0029] The mounting assembly includes circular plates 200 that are fixedly and sealed within the tube body 104 and the rear sealing tube 108, respectively. The circular plates 200 have multiple insertion holes 201 that correspond one-to-one with the positions of the heat exchange tubes 102. A cover 202 is fixedly and sealed to the insertion hole 201 within the rear sealing tube 108 for inserting one end of the baffle 110 and limiting the end of the insertion post 205. A through-tube 203 is fixedly and sealed to the insertion hole 201 within the tube body 104, and a threaded and sealed cap 204 is provided at the outer end of the through-tube 203. During installation, the insertion post 205 at one end of the baffle 110 can be inserted into the heat exchange tube 102 through the through pipe 203, allowing it to pass through the heat exchange tube 102 and extend into the cover 202 to complete the limiting. Then, the through pipe 203 is closed by tightening the sealing cap 204, thereby limiting the insertion post 205 at the other end, and the installation of the baffle 110 can be completed. This allows the baffle 110 to be quickly installed and replaced without disassembling the heat exchange tube 102. The installation process is simple and the positioning is reliable, which is conducive to improving work efficiency in later maintenance.

[0030] In this embodiment, the cylinder 100, the pipe 104, and the rear sealing pipe 108 are connected by a flange seal. The end of the pipe 104 away from the cylinder 100 is provided with a front sealing pipe 109. The front sealing pipe 109 and the pipe 104 are connected by a flange seal. When installing the baffle 110, the front sealing pipe 109 can be opened first, and then the sealing cap 204 can be unscrewed to install the baffle 110.

[0031] Specifically, the baffle 110 is a rigid, twisted ribbon structure that matches the inner diameter of the heat exchange tube 102. The baffle 110 forms a continuous twisted surface along its length. When the fluid flows through the inside of the heat exchange tube 102, it can significantly break the laminar flow state of the fluid inside the tube, forcing the fluid to flow tangentially and radially at the same time, thereby creating a stronger turbulence effect. This effectively prevents particulate impurities from depositing on the tube wall or in dead corners, reducing the occurrence of coking.

[0032] Please see Figures 1-5 To further suppress coking inside the cylinder 100, a support plate 111 is fixedly provided on the outside of the cylinder 100. The support plate 111 has a reserved hole and can be fixed by expansion bolts. A striking component is provided between the support plates 111.

[0033] The striking assembly includes a fixed plate 300 fixedly mounted on a support plate 111. A vertical block 301 is fixedly mounted on the fixed plate 300. A groove is formed inside the vertical block 301, and a sliding column 302 is fixedly mounted within the groove. A striking hemisphere 303 is positioned between the vertical blocks 301. A top rod 304 is fixedly mounted on the striking hemisphere 303. A horizontal bar 305 extends from the groove and is fixedly connected to the top rod 304 on the sliding column 302. The horizontal bar 305 slides between itself and the sliding column 302. A limit block 306 is also fixedly mounted within the groove to limit the travel of the horizontal bar 305. A spring 307 is fitted onto the sliding column 302 to push the horizontal bar 305 downwards. The spring 307 automatically resets the horizontal bar 305, ensuring the stability of the striking hemisphere 303's return position.

[0034] Among them, the sliding column 302 is fitted with a buffer pad that contacts both ends of the spring 307, and the crossbar 305 and the limiting block 306 are provided with a buffer pad to reduce the impact force, prevent slippage or deviation, and improve the reset stability.

[0035] To achieve automatic striking, the striking assembly also includes a motor 308 mounted on a fixed plate 300. A cam 309 is fixedly mounted on the output end of the motor 308. When the cam 309 rotates periodically, it pushes the push rod 304, causing the striking hemisphere 303 to periodically impact the surface of the cylinder 100. By activating the motor 308, automatic striking of the exterior of the heat exchanger can be achieved, promptly cleaning up dust and coking caused by the high-temperature, high-dust environment, ensuring that the heat exchanger maintains good heat transfer capacity during long-term operation.

[0036] In use, a fluid (such as high-temperature flue gas or hot fluid) enters the cylinder 100 through the connecting pipe 107 on the cylinder 100. Inside the cylinder 100, it flows in an S-shaped bend along the path guided by the baffle 103, continuously flowing around the outer wall of the heat exchange tube 102 and exchanging heat with the second fluid inside the heat exchange tube 102. Finally, it is discharged from the connecting pipe 107 at the other end. The second type of fluid (such as cooling water or process medium) enters from the connecting pipe 106 below the tube body 104 and flows along the heat exchange tube 102 towards the rear sealing tube 108. During the flow, the twisted baffles 110 installed inside the heat exchange tube 102 create strong turbulence in the fluid, preventing dust, sludge, and other impurities in the fluid from depositing inside the tube and reducing the risk of coking. After passing through the lower bundle heat exchange tube 102 and entering the rear sealing tube 108, the fluid returns to the upper part of the tube body 104 through the upper bundle heat exchange tube 102 and is discharged through the connecting pipe 106 above the cylinder 100, achieving continuous heat exchange flow from bottom to top. The cam 309 is driven by the motor 308 to rotate periodically, causing the push rod 304 to push the striking hemisphere 303 to impact the surface of the cylinder 100, generating a striking vibration that can effectively peel off coking material or dust adhering to the inner wall of the cylinder 100, the outside of the heat exchange tube 102, or the surface of the baffle 103, further reducing the risk of coking.

[0037] In summary, the above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall fall within the scope of the patent of the present utility model.

Claims

1. An anti-coking heat exchanger, comprising a cylindrical body (100), characterized in that: The cylindrical body (100) has openings at both ends, with tube sheets (101) at each opening. Multiple heat exchange tubes (102) are arranged between the tube sheets (101). Multiple baffles (103) are evenly spaced inside the cylindrical body (100). The heat exchange tubes (102) pass through the baffles (103). One end of the cylindrical body (100) has a tube body (104). A partition plate (105) is provided inside the tube body (104). Connecting pipes (106) are provided on the tube body (104) for conveying and discharging fluid to and from the heat exchange tubes (102). The cylindrical body (100) has connecting pipes (106) for conveying and discharging fluid to and from the heat exchange tubes (102). 100) Connecting pipe two (107) for conveying and discharging fluid, the other end of the cylinder (100) is provided with a rear sealing pipe (108), the end of the pipe body (104) away from the cylinder (100) is provided with a front sealing pipe (109), a baffle (110) passing through the heat exchange pipe (102) is provided between the pipe body (104) and the rear sealing pipe (108), and an installation assembly for installing the baffle (110) is provided inside the pipe body (104) and the rear sealing pipe (108), and a support plate (111) is provided opposite to the cylinder (100), and a knocking assembly is provided between the support plates (111).

2. The anti-coking heat exchanger according to claim 1, characterized in that: The mounting assembly includes a circular plate (200) disposed in the tube body (104) and the rear sealing tube (108), respectively. The circular plate (200) is provided with a plurality of insertion holes (201) corresponding to the heat exchange tube (102). The circular plate (200) in the rear sealing tube (108) is provided with a cover (202) corresponding to the insertion hole (201). The circular plate (200) in the tube body (104) is provided with a through pipe (203) corresponding to the insertion hole (201). The through pipe (203) is provided with a threaded cap (204).

3. The anti-coking heat exchanger according to claim 1, characterized in that: The two ends of the spoiler (110) are respectively provided with inserts (205).

4. The anti-coking heat exchanger according to claim 1, characterized in that: The striking assembly includes a fixed plate (300) disposed between support plates (111), with opposing blocks (301) on the fixed plate (300), a groove inside the block (301), a sliding column (302) inside the groove, a striking hemisphere (303) between the blocks (301), a top rod (304) on the striking hemisphere (303), a crossbar (305) extending from the groove and connected to the top rod (304) on the sliding column (302), and a limiting block (306) located below the crossbar (305) inside the groove.

5. The anti-coking heat exchanger according to claim 4, characterized in that: A spring (307) for pushing the crossbar (305) is fitted on the sliding column (302).

6. The anti-coking heat exchanger according to claim 4, characterized in that: A motor (308) is provided on the fixed plate (300), and the output end of the motor (308) is provided with a cam (309) that cooperates with the push rod (304).

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