Tail gas waste heat recovery device with heat exchanger convenient to replace

Abstract

The utility model relates to the technical field of recovery devices, in particular to a tail gas waste heat recovery device with a heat exchanger convenient to replace. The technical problem that in the long-time use process of an existing tail gas waste heat recovery device, due to the fact that the performance of a heat exchanger body may be gradually attenuated, the tail gas waste heat recovery efficiency is reduced, and continuous and efficient operation of the whole device is affected is solved. According to the technical scheme, the tail gas waste heat recovery device facilitating replacement of the heat exchanger comprises a shell, a sealing assembly, a recovery assembly, a clamping assembly, a water supply assembly and a mounting assembly, and when tail gas needs to be recovered, an arc-shaped clamping plate rotates along a connecting shaft until an arc-shaped rubber pad is completely attached to the joint of a tail gas pipeline and tail gas outflow; the sealing performance can be improved, tail gas leakage can be avoided, then after complete attachment, the positioning columns penetrate through the arc-shaped clamping plates and then are screwed and fixed through the nuts, and therefore the tail gas pipeline is fixedly connected with the tail gas outflow position.

Description

Technical Field

[0001] The utility model relates to the technical field of recovery devices, in particular to an exhaust gas residual temperature recovery device which is convenient for replacing a heat exchanger. Background Art

[0002] An exhaust gas residual heat recovery device is a system that can capture and utilize excess heat in engine exhaust. This device is commonly used in various heat engines, especially internal combustion engines, to improve energy efficiency. When the engine is running, it generates a large amount of heat, but not all of the heat can be used to do work. Part of the heat will be discharged into the environment in the form of exhaust gas. The exhaust gas residual heat recovery device utilizes this part of wasted heat and transfers its heat to the working fluid (such as water or air) through a heat exchange process, thereby increasing the temperature of the working fluid and providing heat energy for other systems or equipment. During long-term use, the existing exhaust gas residual heat recovery device may gradually decay due to the performance of the heat exchanger body, resulting in a decrease in the exhaust gas residual heat recovery efficiency, thereby affecting the continued efficient operation of the overall equipment; therefore, we propose an exhaust gas residual heat recovery device that is easy to replace the heat exchanger to solve the above-mentioned problems. Utility Model Content

[0003] In order to overcome the problem that during long-term use, the performance of the heat exchanger body of the existing exhaust gas waste heat recovery device may gradually decay, resulting in reduced exhaust gas waste heat recovery efficiency, thereby affecting the continuous and efficient operation of the overall equipment.

[0004] The technical solution of the utility model is: a tail gas residual heat recovery device that is easy to replace a heat exchanger, including a shell, a sealing component, a recovery component, a clamping component, a water supply component and an installation component; a recovery component for recovering the tail gas residual temperature is installed in the middle of the inner side of the shell, a sealing component for fixing the recovery component to the exhaust gas outflow position is installed at one end of the recovery component, clamping components for clamping and fixing the position of the recovery component are installed on both sides of the shell, a mounting component for driving the recovery component to be moved out of the shell for replacement and fixedly connected to the shell is installed at the lower end of the recovery component, and a water supply component for improving the exhaust gas recovery utilization rate is installed at the upper end of the installation component.

[0005] Preferably, the performance of the heat exchanger body is checked first. If the performance of the heat exchanger body has declined, the old one is removed first and the new heat exchanger body is placed on the arc support frame. Then, by pushing the heat exchanger body, the slider drives the arc support frame to move along the slide groove into the inside of the shell until the heat exchanger body is positioned and connected with the U-shaped pipe and stops moving. When the heat exchanger body enters the shell and confirms that the position is correct, the telescopic column drives the arc clamping frame along the telescopic sleeve to approach the heat exchanger body through the drive of the cylinder until the arc soft pad is completely in contact with the heat exchanger body and is fixed and clamped to prevent the heat exchanger body from being displaced during use. After all are fixed, when the exhaust gas needs to be recovered, the arc clamping plate is rotated along the connecting shaft until the arc rubber pad is completely in contact with the connection between the exhaust pipe and the exhaust gas outflow, which can increase the sealing and prevent exhaust gas leakage. Then, after it is fully fitted, the positioning column passes through the arc clamping plate and is tightened and fixed by the nut, thereby fixing the exhaust pipe and the exhaust gas outflow position.

[0006] Preferably, the sealing assembly includes a connecting shaft, an arc-shaped clamping plate, an arc-shaped rubber pad, a positioning column and a nut. The arc-shaped clamping plates are symmetrically installed on both sides of the connecting shaft, and the arc-shaped clamping plates are rotatably connected to the connecting shaft. The inner side of the arc-shaped clamping plates is installed with an arc-shaped rubber pad for increasing the sealing and preventing exhaust gas leakage. The upper ends of the two groups of arc-shaped clamping plates are penetrated by positioning columns, and the outer sides of the positioning columns are laterally sleeved with two groups of nuts. When the exhaust gas needs to be recovered, the arc-shaped clamping plates are rotated along the connecting shaft until the arc-shaped rubber pad is completely fitted into the connection between the exhaust gas pipe and the exhaust gas outflow, which can increase the sealing and prevent exhaust gas leakage. Then, after it is completely fitted, the positioning column passes through the arc-shaped clamping plate and is tightened and fixed by the nut, thereby fixing the exhaust gas pipe and the exhaust gas outflow position.

[0007] Preferably, the recovery component includes an exhaust gas pipe, a U-shaped pipe, a sealing ring sleeve, a heat exchanger body and an outlet pipe. The exhaust gas pipe passing through the shell is installed at one end of the U-shaped pipe, and the heat exchanger body is installed at the end of the U-shaped pipe away from the exhaust gas pipe. A sealing ring sleeve is provided at the connection between the U-shaped pipe and the heat exchanger body to increase the sealing and avoid air leakage. An outlet pipe is installed at the end of the heat exchanger body away from the U-shaped pipe, and a valve is provided at the connection between the outlet pipe and the heat exchanger body. After the exhaust gas pipe is connected to the exhaust gas outflow position, the exhaust gas enters the U-shaped pipe through the exhaust gas pipe and reaches the heat exchanger body. In this process, the sealing ring sleeve can increase the sealing and avoid air leakage. The U-shaped pipe can buffer and accumulate the exhaust gas to ensure stable exhaust gas transmission, reduce heat loss during transmission, and improve the residual heat recovery efficiency. When the exhaust gas loses heat, the exhaust gas that has lost heat is discharged into the atmosphere through the outlet pipe by opening the valve.

[0008] Preferably, the clamping assembly includes a cylinder, a telescopic sleeve, a telescopic column, an arc-shaped clamping frame and an arc-shaped cushion. The telescopic sleeve passes through the shell, and the cylinder is installed at one end of the telescopic sleeve. The inner sleeve of the telescopic sleeve is provided with a telescopic column, and the end of the telescopic column away from the telescopic sleeve is installed with an arc-shaped clamping frame, and the inner side of the arc-shaped clamping frame is installed with an arc-shaped cushion. When the heat exchanger body enters the shell and the position is confirmed to be correct, the telescopic column drives the arc-shaped clamping frame along the telescopic sleeve to approach the heat exchanger body through the drive of the cylinder until the arc-shaped cushion is completely fitted with the heat exchanger body, and is fixed and clamped to prevent the heat exchanger body from displacement during use.

[0009] Preferably, the water supply assembly includes a water supply tank, a water inlet pipe, a water pump, a water outlet pipe, a water storage tank, a water inlet pipe, a water outlet pipe and a sealing cover. A water supply tank connected to the installation assembly is installed on one side of the heat exchanger body, a water inlet pipe is installed on one side of the water supply tank, a water pump is installed at a corner of one side of the water supply tank, and a water outlet pipe fixedly connected to the heat exchanger body is installed at the upper corner of the water supply tank. Clean water is poured into the water supply tank through the water inlet pipe, and then driven by the water pump, the clean water enters the water outlet pipe from the water supply tank and reaches the heat exchanger body, and the clean water is heated by the residual heat of the exhaust gas through the heat exchanger body.

[0010] Preferably, a water tank connected to the mounting assembly is installed on the side of the heat exchanger body away from the water supply tank, a water inlet pipe fixedly connected to the heat exchanger body is installed at the upper corner of the water tank, an outlet pipe is installed in the middle of one side of the water tank, a sealing cover is provided on the outside of the end of the outlet pipe away from the water tank, and then the heated clean water is transported to the water tank through the water inlet pipe. When the water tank is full, the sealing cover is loosened and the heated clean water flows out from the outlet pipe, which is convenient for residents to use, improves the utilization efficiency of the exhaust gas residual heat, and also improves the utilization rate of resources.

[0011] Preferably, the installation assembly includes a base plate, an arc-shaped support frame and a slider. Two sets of slide grooves are horizontally opened on the base plate. Sliders are installed at the two side edges of the lower end of the arc-shaped support frame. The slider drives the arc-shaped support frame to slide along the slide groove and connect with the base plate. The heat exchanger body is placed on the arc-shaped support frame. Then, by pushing the heat exchanger body, the slider drives the arc-shaped support frame to move along the slide groove toward the inside of the shell until the heat exchanger body is positioned and connected with the U-shaped pipe and stops moving.

[0012] Beneficial effects of the utility model:

[0013] 1. According to the previous exhaust gas residual heat recovery device, during long-term use, the performance of the heat exchanger body may gradually decay, resulting in a decrease in the exhaust gas residual heat recovery efficiency, thereby affecting the continuous and efficient operation of the overall equipment. The difference is that the performance of the heat exchanger body is checked first. If the performance of the heat exchanger body is decayed, the old heat exchanger body is removed first, and the new heat exchanger body is placed on the arc support frame. Then, by pushing the heat exchanger body, the slider drives the arc support frame to move along the slide groove into the shell until the heat exchanger body is positioned and connected with the U-shaped pipe, and then stops moving. When the heat exchanger body enters the shell, confirm that the position is correct. Afterwards, driven by the cylinder, the telescopic column drives the arc-shaped clamping frame along the telescopic sleeve to approach the heat exchanger body until the arc-shaped soft pad is completely fitted with the heat exchanger body, and is fixed and clamped to prevent the heat exchanger body from displacement during use. After all the fixation is completed, when the exhaust gas needs to be recovered, the arc-shaped clamping plate is rotated along the connecting shaft until the arc-shaped rubber pad is completely fitted with the connection between the exhaust gas pipe and the exhaust gas outflow, which can increase the sealing and prevent exhaust gas leakage. Then, after it is completely fitted, the positioning column passes through the arc-shaped clamping plate, and then is tightened and fixed by a nut, thereby fixing the exhaust gas pipe and the exhaust gas outflow position.

[0014] 2. After the exhaust gas pipe is connected to the exhaust gas outflow position, the exhaust gas enters the U-shaped pipe through the exhaust gas pipe and reaches the heat exchanger body. In this process, the sealing ring sleeve can increase the sealing to avoid air leakage. Then, clean water is poured into the water supply tank through the water inlet pipe. Then, driven by the water pump, the clean water enters the water outlet pipe from the water supply tank and reaches the heat exchanger body. The clean water is heated by the residual heat of the exhaust gas through the heat exchanger body. Finally, the heated clean water is transported to the water storage tank through the water inlet pipe. When the water storage tank is full, the heated clean water flows out from the outlet pipe by loosening the sealing cover, which is convenient for residents to use. When the exhaust gas loses heat, the exhaust gas that has lost heat is discharged into the atmosphere through the outlet pipe by opening the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the overall structure of the utility model from another angle;

[0017] Figure 3 This is a schematic diagram of the sealing assembly structure of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the recycling component of the utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the clamping assembly of the utility model;

[0020] Figure 6This is a schematic diagram of the structure of the water supply component of the utility model;

[0021] Figure 7 This is a schematic diagram of the installation component structure of the utility model.

[0022] Explanation of the reference numerals: 1. Shell; 2. Sealing assembly; 3. Recovery assembly; 4. Clamping assembly; 5. Water supply assembly; 6. Installation assembly; 201. Connecting shaft; 202. Arc-shaped clamping plate; 203. Arc-shaped rubber pad; 204. Positioning column; 205. Nut; 301. Exhaust pipe; 302. U-shaped pipe; 303. Sealing ring sleeve; 304. Heat exchanger body; 305. Exhaust pipe; 401. Cylinder; 402. Telescopic sleeve; 403. Telescopic column; 404. Arc-shaped clamping frame; 405. Arc-shaped cushion; 501. Water supply tank; 502. Water inlet pipe; 503. Water pump; 504. Water outlet pipe; 505. Water storage tank; 506. Water inlet pipe; 507. Export pipe; 508. Sealing cover; 601. Bottom plate; 602. Slide groove; 603. Arc-shaped support frame; 604. Slider. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] See also Figure 1-4The utility model provides an embodiment: an exhaust gas residual heat recovery device that is convenient for replacing a heat exchanger, comprising a shell 1, a sealing component 2, a recovery component 3, a clamping component 4, a water supply component 5 and a mounting component 6; a recovery component 3 for exhaust gas residual heat recovery is installed in the middle of the inner side of the shell 1, and a sealing component 2 for fixing the recovery component 3 with the exhaust gas outflow position is installed at one end of the recovery component 3, and clamping components 4 for clamping and fixing the position of the recovery component 3 are installed on both sides of the shell 1, and a mounting component 6 for driving the recovery component 3 to move out of the shell 1 for replacement and fixedly connected to the shell 1 is installed at the lower end of the recovery component 3, and a water supply component 5 for improving the exhaust gas recovery rate is installed at the upper end of the mounting component 6, and the sealing component 2 comprises a connecting shaft 201, an arc-shaped clamping plate 202, an arc-shaped rubber pad 203, a positioning column 204 and a nut 205, and the arc-shaped clamping plates 20 are symmetrically installed on both sides of the connecting shaft 201 2, the arc clamping plate 202 is rotatably connected to the connecting shaft 201, and an arc rubber pad 203 is installed on the inner side of the arc clamping plate 202 to increase the sealing performance and prevent exhaust gas leakage. The upper ends of the two sets of arc clamping plates 202 are penetrated with positioning columns 204, and the outer sides of the positioning columns 204 are laterally sleeved with two sets of nuts 205. The recovery component 3 includes an exhaust pipe 301, a U-shaped pipe 302, a sealing ring sleeve 303, a heat exchanger body 304 and an exhaust pipe 305. The U-shaped An exhaust pipe 301 passing through the shell 1 is installed at one end of the pipe 302, and a heat exchanger body 304 is installed at the end of the U-shaped pipe 302 away from the exhaust pipe 301. A sealing ring sleeve 303 is provided at the connection between the U-shaped pipe 302 and the heat exchanger body 304 to increase the sealing and avoid air leakage. An outlet pipe 305 is installed at the end of the heat exchanger body 304 away from the U-shaped pipe 302, and a valve is provided at the connection between the outlet pipe 305 and the heat exchanger body 304.

[0025] See also Figure 5-7In this embodiment, the clamping assembly 4 includes a cylinder 401, a telescopic sleeve 402, a telescopic column 403, an arc-shaped clamping frame 404 and an arc-shaped cushion 405. The telescopic sleeve 402 passes through the shell 1, and the cylinder 401 is installed at one end of the telescopic sleeve 402. The telescopic column 403 is installed inside the telescopic sleeve 402. The end of the telescopic column 403 away from the telescopic sleeve 402 is installed with an arc-shaped clamping frame 404, and the inner side of the arc-shaped cushion 405 is installed. The water supply assembly 5 includes a water supply tank 501, a water inlet pipe 502, a water pump 503, a water outlet pipe 504, a water storage tank 505, a water inlet pipe 506, a guide pipe 507 and a sealing cover 508. A water supply tank 501 connected to the mounting assembly 6 is installed on one side of the heat exchanger body 304, and a water inlet pipe 502 is installed on one side of the water supply tank 501. The water supply tank 501 has a corner A water pump 503 is installed at the place where the heat exchanger body 304 is installed. A water outlet pipe 504 fixedly connected to the heat exchanger body 304 is installed at the upper corner of the water supply tank 501. A water storage tank 505 connected to the installation component 6 is installed on the side of the heat exchanger body 304 away from the water supply tank 501. A water inlet pipe 506 fixedly connected to the heat exchanger body 304 is installed at the upper corner of the water storage tank 505. A derivation pipe 507 is installed in the middle of one side of the water storage tank 505. A sealing cover 508 is provided on the outer side of the derivation pipe 507 away from the water storage tank 505. The installation component 6 includes a base plate 601, an arc-shaped support frame 603 and a slider 604. Two groups of slide grooves 602 are horizontally opened on the base plate 601. Slide blocks 604 are respectively installed at the edges of both sides of the lower end of the arc-shaped support frame 603. The sliders 604 drive the arc-shaped support frame 603 to slide along the slide grooves 602 and connect with the base plate 601.

[0026] When working, first check the performance of the heat exchanger body 304. If the performance of the heat exchanger body 304 is attenuated, first remove the old one and place the new heat exchanger body 304 on the arc support frame 603. Then, by pushing the heat exchanger body 304, the slider 604 drives the arc support frame 603 to move along the slide groove 602 toward the inside of the shell 1 until the heat exchanger body 304 is positioned and connected with the U-shaped pipe 302, and then stops moving. When the heat exchanger body 304 enters the shell 1 and confirms that the position is correct, the telescopic column 403 drives the arc clamping frame 404 along the telescopic sleeve 402 to approach the heat exchanger body 304 through the drive of the cylinder 401, until the arc cushion 405 is completely attached to the heat exchanger body 304, and fixes and clamps it to prevent the heat exchanger body 304 from being displaced during use.

[0027] After all the fixings are completed, when the exhaust gas needs to be recovered, the arc clamping plate 202 is rotated along the connecting shaft 201 until the arc rubber pad 203 is completely attached to the connection between the exhaust pipe 301 and the exhaust gas outflow, which can increase the sealing and prevent exhaust gas leakage. Then, after the connection is completely attached, the positioning column 204 passes through the arc clamping plate and is tightened and fixed by the nut 205, thereby the exhaust pipe 301 is fixedly connected to the exhaust gas outflow position;

[0028] After the exhaust gas pipe 301 is connected to the exhaust gas outflow position, the exhaust gas enters the U-shaped pipe 302 through the exhaust gas pipe 301 and reaches the heat exchanger body 304. During this process, the sealing ring sleeve 303 can increase the sealing to avoid air leakage. Then, clean water is poured into the water supply tank 501 through the water inlet pipe 502. Then, driven by the water pump 503, the clean water enters the water outlet pipe 504 from the water supply tank 501 and reaches the heat exchanger body 304. The clean water is heated by the residual heat of the exhaust gas through the heat exchanger body 304. Finally, the heated clean water is transported to the water storage tank 505 through the water inlet pipe 506. When the water storage tank 505 is full, the heated clean water flows out from the outlet pipe 507 by loosening the sealing cover 508, which is convenient for residents to use. When the exhaust gas loses heat, the exhaust gas that has lost heat is discharged into the atmosphere through the outlet pipe 305 by opening the valve.

[0029] Through the above steps, first check the performance of the heat exchanger body 304. If the performance of the heat exchanger body 304 is attenuated, first remove the old one and place the new heat exchanger body 304 on the arc support frame 603. Then, by pushing the heat exchanger body 304, the slider 604 drives the arc support frame 603 to move along the slide groove 602 toward the inside of the shell 1 until the heat exchanger body 304 is positioned and connected with the U-shaped pipe 302, and then stop moving. When the heat exchanger body 304 enters the shell 1 and confirms that the position is correct, the telescopic column 403 drives the arc clamping frame 404 along the telescopic sleeve 402 to approach the shell 1 through the drive of the cylinder 401. The heat exchanger body 304 is fixed and clamped until the arc-shaped soft pad 405 is completely in contact with the heat exchanger body 304 to prevent the heat exchanger body 304 from being displaced during use. After all the fixation is completed, when the exhaust gas needs to be recovered, the arc-shaped clamping plate 202 is rotated along the connecting shaft 201 until the arc-shaped rubber pad 203 is completely in contact with the connection between the exhaust gas pipe 301 and the exhaust gas outflow, which can increase the sealing and prevent exhaust gas leakage. Then, after it is completely in contact, the positioning column 204 passes through the arc-shaped clamping plate and is tightened and fixed by the nut 205, thereby the exhaust gas pipe 301 is fixedly connected to the exhaust gas outflow position.

[0030] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. An exhaust gas residual heat recovery device that is convenient for replacing a heat exchanger, comprising a housing (1); characterized in that: The invention also comprises a sealing component (2), a recovery component (3), a clamping component (4), a water supply component (5) and a mounting component (6); the recovery component (3) for recovering the residual heat of the exhaust gas is mounted in the middle of the inner side of the shell (1); one end of the recovery component (3) is mounted with the sealing component (2) for fixedly connecting the recovery component (3) to the exhaust gas outflow position; the two sides of the shell (1) are respectively mounted with the clamping component (4) for clamping and fixing the position of the recovery component (3); the lower end of the recovery component (3) is mounted with the mounting component (6) for driving the recovery component (3) to be removed from the shell (1) for replacement and fixedly connected to the shell (1); the upper end of the mounting component (6) is mounted with the water supply component (5) for improving the exhaust gas recovery rate.

2. The exhaust gas residual heat recovery device that is convenient for replacing the heat exchanger according to claim 1 is characterized in that: The sealing assembly (2) comprises a connecting shaft (201), an arc-shaped clamping plate (202), an arc-shaped rubber pad (203), a positioning column (204) and a nut (205); the arc-shaped clamping plates (202) are symmetrically mounted on both sides of the connecting shaft (201); the arc-shaped clamping plates (202) are rotatably connected to the connecting shaft (201); the inner side of the arc-shaped clamping plate (202) is mounted with the arc-shaped rubber pad (203) for increasing the sealing performance and preventing exhaust gas leakage; the upper ends of the two groups of arc-shaped clamping plates (202) are penetrated by the positioning columns (204); and the outer sides of the positioning columns (204) are laterally sleeved with two groups of nuts (205).

3. The exhaust gas residual heat recovery device that is convenient for replacing the heat exchanger according to claim 1 is characterized in that: The recovery component (3) comprises an exhaust pipe (301), a U-shaped pipe (302), a sealing ring sleeve (303), a heat exchanger body (304) and an air outlet pipe (305); the exhaust pipe (301) passing through the shell (1) is installed at one end of the U-shaped pipe (302); the heat exchanger body (304) is installed at one end of the U-shaped pipe (302) away from the exhaust pipe (301); the sealing ring sleeve (303) for increasing sealing performance and preventing air leakage is sleeved at the connection between the U-shaped pipe (302) and the heat exchanger body (304); the air outlet pipe (305) is installed at one end of the heat exchanger body (304) away from the U-shaped pipe (302); and a valve is provided at the connection between the air outlet pipe (305) and the heat exchanger body (304).

4. The exhaust gas residual heat recovery device that is convenient for replacing the heat exchanger according to claim 1 is characterized in that: The clamping assembly (4) comprises a cylinder (401), a telescopic sleeve (402), a telescopic column (403), an arc-shaped clamping frame (404) and an arc-shaped cushion (405); the telescopic sleeve (402) passes through the shell (1); one end of the telescopic sleeve (402) is mounted with the cylinder (401); the telescopic column (403) is sleeved inside the telescopic sleeve (402); the arc-shaped clamping frame (404) is mounted on one end of the telescopic column (403) away from the telescopic sleeve (402); and the arc-shaped cushion (405) is mounted on the inner side of the arc-shaped clamping frame (404).

5. The exhaust gas residual heat recovery device that is convenient for replacing the heat exchanger according to claim 3 is characterized in that: The water supply assembly (5) comprises a water supply box (501), a water inlet pipe (502), a water pump (503), a water outlet pipe (504), a water storage tank (505), a water inlet pipe (506), a water outlet pipe (507) and a sealing cover (508); the water supply box (501) connected to the mounting assembly (6) is mounted on one side of the heat exchanger body (304); the water inlet pipe (502) is mounted on one side of the water supply box (501); the water pump (503) is mounted at a corner of one side of the water supply box (501); and the water outlet pipe (504) fixedly connected to the heat exchanger body (304) is mounted at an upper corner of the water supply box (501).

6. The exhaust gas residual heat recovery device that is convenient for replacing the heat exchanger according to claim 5 is characterized in that: The water storage tank (505) connected to the mounting assembly (6) is installed on the side of the heat exchanger body (304) away from the water supply tank (501); the water inlet pipe (506) fixedly connected to the heat exchanger body (304) is installed at the upper corner of the water storage tank (505); the outlet pipe (507) is installed in the middle of one side of the water storage tank (505); and the sealing cover (508) is sleeved on the outside of one end of the outlet pipe (507) away from the water storage tank (505).

7. The exhaust gas residual heat recovery device that is convenient for replacing the heat exchanger according to claim 1 is characterized in that: The mounting assembly (6) comprises a base plate (601), an arc-shaped support frame (603) and a slider (604); two groups of slide grooves (602) are transversely opened on the base plate (601); the sliders (604) are respectively installed at the two side edges of the lower end of the arc-shaped support frame (603); the sliders (604) drive the arc-shaped support frame (603) to slide along the slide grooves (602) and be connected to the base plate (601).

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