Heat exchanger with cleaning function

Abstract

The invention relates to a heat exchanger with a cleaning function, and relates to the technical field of heat exchangers, the heat exchanger comprises a sealing shell fixedly connected to a flue gas pipeline, the lower end of the sealing shell is fixedly connected with a flue gas discharge pipe, a heat exchanger body is installed in the sealing shell, and the lower end of the heat exchanger body is fixedly connected and communicated with a flue gas inlet cavity; the flue gas inlet cavity is fixedly connected and communicated with the flue gas pipeline, a waste discharge port is formed in the lower end of the flue gas inlet cavity, a blocking assembly is arranged at the waste discharge port, a gate plate used for blocking the flue gas discharge channel is installed on the flue gas discharge channel, and a plurality of heat exchange pipe cleaning nozzles are fixedly connected to the upper end of the sealing shell. The spraying end of the heat exchange pipe cleaning nozzle is arranged in the sealing shell and located above the heat exchanger body, and the sealing shell is further provided with a side wall nozzle used for cleaning the sealing shell and a flashboard cleaning nozzle used for cleaning the flashboard. The device has the effect that the situation that the heat exchanger is blocked by impurities in flue gas is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of heat exchangers, and in particular to a heat exchanger with a cleaning function. Background Art

[0002] Heat exchanger is an energy-saving device that realizes heat transfer between two or more fluids at different temperatures. It transfers heat from a higher temperature fluid to a lower temperature fluid, so that the fluid temperature reaches the specified index of the process to meet the needs of process conditions. It is also one of the main equipment for improving energy utilization. Heat exchangers play an important role in chemical, petroleum, power, food and many other industrial production. In chemical production, they can be used as heaters, coolers, condensers, evaporators and reboilers, etc., and are widely used.

[0003] Regarding the above-mentioned related technologies, a large amount of flue gas with heat will be generated during the process of coal distillation, and a heat exchanger is usually required to recover the flue gas. However, a large amount of impurities such as tar may condense at the top inlet of the heat exchanger, making the top inlet of the heat exchanger small or even blocked, thereby affecting the heat exchange efficiency of the heat exchanger. Summary of the invention

[0004] In order to reduce the occurrence of a heat exchanger being clogged by impurities in flue gas, the present application provides a heat exchanger with a cleaning function.

[0005] The present application provides a heat exchanger with a cleaning function using the following technical solution: A heat exchanger with a cleaning function comprises a sealed shell fixedly connected to a flue gas duct, the lower end of the sealed shell being fixedly connected to a flue gas exhaust pipe, a heat exchanger body being installed in the sealed shell, the lower end of the heat exchanger body being fixedly connected and communicated with a flue gas inlet chamber, the flue gas inlet chamber being fixedly connected and communicated with the flue gas duct, a waste discharge port being provided at the lower end of the flue gas inlet chamber, a plugging assembly for blocking the waste discharge port being provided at the waste discharge port, a flue gas exhaust channel being formed between the upper end of the heat exchanger body and a side wall away from a side of the flue gas duct and an inner wall of the sealed shell, a gate plate for blocking the flue gas exhaust channel being installed on the flue gas exhaust channel, a plurality of heat exchange tube cleaning nozzles being fixedly connected to the upper end of the sealed shell, the spray ends of the heat exchange tube cleaning nozzles being arranged inside the sealed shell and above the heat exchanger body, and a side wall nozzle for cleaning the sealed shell and a gate plate cleaning nozzle for cleaning the gate plate being also arranged on the sealed shell.

[0006] By adopting the above technical scheme, the flue gas can enter the heat exchanger body through the flue gas inlet cavity for heat exchange, and then the flue gas can be discharged downward through the flue gas exhaust pipe. At the same time, in order to make full use of the flue gas, the gate plate can be kept closed for a period of time when the flue gas just enters the flue gas channel, thereby completing the heat exchange between the flue gas and the heat exchanger. Then, when the heat exchange is completed, the heat exchanger body below it can be cleaned by providing high-pressure ammonia water to the heat exchange tube cleaning nozzle to clean the impurities on its surface. At the same time, the gate plate and the inner wall of the sealed shell can be cleaned by conveying high-pressure ammonia water to the side wall nozzle and the gate plate cleaning nozzle. At the same time, high-pressure ammonia water can also be conveyed to the side wall nozzle and the gate plate cleaning nozzle during the heat exchange process. This not only reduces the accumulation of impurities inside the gate plate and the sealed shell, but also allows the flue gas exhaust pipe to generate a certain negative pressure, accelerates the flow of flue gas in the sealed shell, and further reduces the sedimentation of impurities in the flue gas.

[0007] Optionally, the sealing assembly includes a sealing plate that seals the lower end of the waste outlet, a rotating motor is fixedly connected to the sealing shell, the output shaft of the rotating motor passes through the sealing shell and is placed below the waste outlet, and the sealing plate is fixedly connected to the arc-shaped side wall of the output shaft of the rotating motor.

[0008] By adopting the above technical solution, the rotating motor can be started to drive the sealing plate to rotate, thereby quickly sealing the waste outlet with the sealing plate or canceling the sealing of the waste outlet with the sealing plate.

[0009] Optionally, guide blocks are fixedly connected to both side walls of the heat exchanger body adjacent to the gate plate, the upper end of the guide block is set as an inclined surface and the guide block is inclined at one end close to the gate plate, and the guide block is fixedly connected to the side wall of the sealing shell and seals the gap between the heat exchanger body and the sealing shell.

[0010] By adopting the above technical solution, the ammonia water sprayed by the side wall nozzle can be discharged outside the sealed shell along the guide block by arranging the guide block with an inclined surface.

[0011] Optionally, the heat exchanger body includes an insulating shell fixedly connected to the side wall of the sealed shell close to the smoke exhaust channel, a square tube heat exchanger is fixedly connected inside the insulating shell, a water outlet pipe is fixedly connected to the upper part of the square tube heat exchanger, and a water inlet pipe is fixedly connected to the lower end of the square tube heat exchanger.

[0012] By adopting the above technical solution, the square tube heat exchanger can be protected by providing a heat-insulating shell to reduce the heat loss.

[0013] Optionally, a cleaning plate is provided above the square tube heat exchanger, the cleaning plate has a cavity formed in the cleaning plate, the upper end surface of the cleaning plate has a plurality of through holes formed in the through holes, the through holes are connected to the cavity, the through holes are arranged around the axis of the cleaning plate, and the upper end of the through holes is inclined to the side away from the axis of the cleaning plate, a spray pipe is provided in the through hole, and an elastic bending plate is provided on the spray pipe and the side of the through hole away from the axis of the cleaning plate, the elastic bending plate is arranged in an inverted V shape between the inner wall of the through hole and the outer wall of the spray pipe, one end of the elastic bending plate is fixedly connected to the inner wall of the through hole, and the other end of the elastic bending plate is fixedly connected to the outer wall of the spray pipe, the upper end of the cleaning plate is fixedly connected to a water supply pipe for adding ammonia water to the cavity, and a rotating mechanism for driving the cleaning plate to swing back and forth is provided in the sealed shell.

[0014] By adopting the above technical scheme, high-pressure ammonia water can be added into the cavity through the water supply pipe, and then the ammonia water enters into each spray pipe through the cavity, and is sprayed and cleaned on the upper inner wall of the sealed shell through the spray pipe. At the same time, when the ammonia water enters the spray pipe, the elastic bending plate will be bent to a certain extent, so that the spray pipe will swing to a certain extent, thereby increasing the spray range of a single spray pipe. The cleaning disk can be made to swing back and forth by controlling the rotating mechanism, and the progressive part can expand the spraying area of ​​the spray pipe. At the same time, in the process of reciprocating swinging of the cleaning disk, the spray pipe will be repeatedly pressed by inertia due to the influence of inertia, so that it will shake to a certain extent, thereby improving the spraying uniformity of the single spray pipe. At the same time, the elastic bending plate arranged in an inverted V shape can reduce the situation where the elastic bending plate is stuck when impurities fall, resulting in the inability to deform.

[0015] Optionally, the rotating mechanism includes a servo motor fixedly connected to the upper end of the sealed shell, the output shaft of the servo motor is placed in the sealed shell, a connecting rod is fixedly connected to the arc-shaped side wall of the servo motor output shaft, the connecting rod is perpendicular to the output shaft of the servo motor, and a fixing component for fixing the two is provided between the connecting rod and the cleaning disc.

[0016] By adopting the above technical solution, the servo motor can be controlled to rotate back and forth, and drive the connecting rod to swing back and forth, thereby causing the connecting rod to drive the cleaning disc to swing back and forth.

[0017] Optionally, the fixing assembly includes a clamp-shaped block fixedly connected to the connecting rod, the upper thread of the clamp-shaped block is connected to a fixing bolt, the nut of the fixing bolt is provided with a hexagonal groove, and an adjusting screw is slidably and rotatably connected to the sealing shell, the rod portion of the adjusting screw abuts against the hexagonal groove, and the adjusting screw is used to drive the fixing bolt to rotate.

[0018] By adopting the above technical solution, the fixing bolt can be rotated by adjusting the screw rod, so that the rod of the fixing bolt presses the cleaning disc tightly into the clamp-shaped clamp block, thereby fixing the cleaning disc and the connecting rod.

[0019] Optionally, a threaded hole is provided on the cleaning disc, a driving rod is threadedly connected to the threaded hole, a length direction of the driving rod is parallel to a length direction of the square tube heat exchanger, and the driving rod is passed through and slidably connected to the sealed shell.

[0020] By adopting the above technical solution, the driving rod can be rotated so that the driving rod is threadedly connected in the threaded hole and moves downward along the threaded hole, so that the driving rod is fixed to the cleaning disk, and then the driving rod is lowered so that the driving rod drives the cleaning disk through one of the square tubes of the multiple square tube heat exchangers, and finally the cleaning disk is placed under the square tube heat exchanger, and then the driving rod can be rotated so that the driving rod drives the cleaning disk to rotate, and the rotation direction of the driving rod at this time is opposite to the rotation direction of the driving rod when the driving rod is threadedly connected to the threaded hole. Water is supplied to the cleaning disk through a water supply pipe, so that ammonia water is sprayed on the lower end surface of the square tube heat exchanger through multiple spray pipes, and then the lower end surface of the square tube heat exchanger can be cleaned.

[0021] In summary, the present application includes at least one of the following beneficial technical effects: 1. The heat exchanger body below can be cleaned by supplying high-pressure ammonia water into the cleaning nozzle of the heat exchange tube, and the impurities on its surface can be cleaned. At the same time, the inner wall of the gate plate and the sealed shell can be cleaned by conveying high-pressure ammonia water into the side wall nozzle and the gate plate cleaning nozzle. At the same time, high-pressure ammonia water can also be conveyed into the side wall nozzle and the gate plate cleaning nozzle during the heat exchange process, thereby not only reducing the accumulation of impurities inside the gate plate and the sealed shell, but also generating a certain negative pressure in the flue gas exhaust pipe, accelerating the flow of flue gas in the sealed shell, and further reducing the sedimentation of impurities in the flue gas; 2. The cleaning disc can be made to swing back and forth by controlling the rotating mechanism, and the progressive part can expand the spraying area of ​​the spray pipe. At the same time, during the reciprocating swing of the cleaning disc, the spray pipe will be affected by inertia and will repeatedly press the elastic bending plate, causing itself to swing to a certain extent, thereby improving the spraying uniformity of a single spray pipe; 3. Water can be supplied to the cleaning tray through a water supply pipe, so that the ammonia water can be sprayed on the lower end surface of the square tube heat exchanger through multiple spray pipes, thereby cleaning the lower end surface of the tube heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 is a schematic structural diagram of a heat exchanger body according to an embodiment of the present application; Figure 3 is a schematic structural diagram of a side wall nozzle of an embodiment of the present application; Figure 4 is a schematic structural diagram of a cavity in an embodiment of the present application; Figure 5 yes Figure 4 Schematic diagram of the enlarged structure of part A.

[0023] In the figure, 1, sealing shell; 2, smoke exhaust pipe; 3, heat exchanger body; 31, insulation shell; 32, square tube heat exchanger; 33, water outlet pipe; 34, water inlet pipe; 4, smoke inlet cavity; 41, waste outlet; 42, plugging assembly; 421, plugging plate; 422, rotating motor; 5, smoke exhaust channel; 6, gate; 7, heat exchange tube cleaning nozzle; 8, gate cleaning nozzle; 9, side wall nozzle; 10 , inspection door; 11, guide block; 12, cleaning plate; 121, cavity; 122, through hole; 123, spray pipe; 13, elastic bending plate; 14, water supply pipe; 15, rotating mechanism; 151, servo motor; 152, connecting rod; 153, fixing assembly; 1531, clamp block; 1532, fixing bolt; 15321, hexagonal groove; 1533, adjusting screw; 16, driving rod. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1 -Attached Figure 5 , further details of this application are given.

[0025] The embodiments of the present application are: Figure 1 and Figure 2 A heat exchanger with a cleaning function comprises a sealed shell 1 fixedly connected to a flue gas duct, an inspection door 10 for inspecting the inside of the sealed shell 1 is installed on the side wall of the sealed shell 1, the lower end of the sealed shell 1 is set to be an opening and a flue gas exhaust pipe 2 is fixedly connected to the lower end of the sealed shell 1.

[0026] A heat exchanger body 3 is installed in the sealed shell 1, and the lower end of the heat exchanger body 3 is fixedly connected to and communicated with a smoke inlet chamber 4, and the smoke inlet chamber 4 is fixedly connected to and communicated with the smoke pipe. A smoke exhaust channel 5 is formed between the upper end of the heat exchanger body 3 and the side wall of the heat exchanger body 3 away from the smoke pipe and the inner wall of the sealed shell 1. A gate plate 6 for blocking the smoke exhaust channel 5 is installed on the smoke exhaust channel 5. In this embodiment, the gate plate 6 is any gate plate 6 in the prior art that can block the smoke exhaust pipe 2.

[0027] A waste outlet 41 is provided at the lower end of the flue gas inlet chamber 4, and a plugging assembly 42 for plugging the waste outlet 41 is provided at the waste outlet 41. The plugging assembly 42 includes a plugging plate 421 plugged at the lower end of the waste outlet 41, and the plugging plate 421 is set in a disc shape and its diameter is larger than the waste outlet 41. A rotating motor 422 is fixedly connected to the outer wall of the sealed shell 1, and the output shaft of the rotating motor 422 passes through the sealed shell 1 and is placed on one side below the waste outlet 41, and one end of the plugging plate 421 is fixedly connected to the arc-shaped side wall of the output shaft of the rotating motor 422. Then, by starting the rotating motor 422, the rotating motor 422 drives the plugging plate 421 to rotate, thereby quickly realizing the plugging of the waste outlet 41 by the plugging plate 421 or canceling the plugging of the waste outlet 41 by the plugging plate 421.

[0028] In this embodiment, the heat exchanger body 3 includes a heat-insulating shell 31 fixedly connected to the side wall of the sealed shell 1 near the smoke exhaust channel 5, and a square tube heat exchanger 32 is fixedly connected inside the heat-insulating shell 31. The square tube heat exchanger 32 is a square tube heat exchanger 32 in the prior art, and is provided with a plurality of square holes for smoke to pass through. A water outlet pipe 33 is fixedly connected to the upper part of the square tube heat exchanger 32, and a water inlet pipe 34 is fixedly connected to the lower end of the square tube heat exchanger 32. Thus, water can be transported to the lower part of the square tube heat exchanger 32 through the water inlet pipe 34, and then the water moves upward through the square tube heat exchanger 32, and is finally discharged from the water outlet pipe 33, and in the process, the smoke moving upward in the square holes in the square tube heat exchanger 32 is absorbed.

[0029] A plurality of heat exchange tube cleaning nozzles 7 are fixedly connected to the upper end of the sealed shell 1. In this embodiment, four heat exchange tube cleaning nozzles 7 are provided. The spray end of the heat exchange tube cleaning nozzle 7 is placed inside the sealed shell 1, and the heat exchange tube cleaning nozzle 7 is placed above the heat exchanger body 3. A gate plate 6 cleaning nozzle for cleaning the gate plate 6 is installed on the sealed shell 1. Two gate plate 6 cleaning nozzles are provided and both are placed directly above the gate plate 6.

[0030] Thus, the heat exchanger body 3 below can be cleaned by supplying high-pressure ammonia water into the heat exchange tube cleaning nozzle 7, and impurities on its surface can be cleaned. At the same time, the gate plate 6 can be cleaned by supplying high-pressure ammonia water into the gate plate cleaning nozzle. Two side wall nozzles 9 for cleaning the sealed shell 1 are also installed on the sealed shell 1. Guide blocks 11 are fixedly connected to both side walls of the heat exchanger body 3 adjacent to the gate plate 6. The guide blocks 11 correspond to the side wall nozzles 9 one by one. The upper end of the guide block 11 is set as an inclined surface and the end of the guide block 11 close to the gate plate 6 is inclined. The guide block 11 is fixedly connected to the side wall of the sealed shell 1 and blocks the gap between the heat exchanger body 3 and the sealed shell 1. The spray end of the side wall nozzle 9 faces the side wall of the sealed shell 1 fixedly connected to the guide block 11.

[0031] The inner wall of the sealed housing 1 can be sprayed and cleaned by the side wall nozzle 9, and the ammonia water sprayed by the side wall nozzle 9 can be discharged outside the sealed housing 1 along the guide block 11 by providing a guide block 11 with an inclined surface. At the same time, during the heat exchange process, high-pressure ammonia water can be delivered to the side wall nozzle 9 and the gate plate 6 cleaning nozzle, thereby not only reducing the accumulation of impurities inside the gate plate 6 and the sealed housing 1, but also generating a certain negative pressure in the smoke exhaust pipe 2, accelerating the flow of smoke in the sealed housing 1.

[0032] A cleaning plate 12 is provided above the square tube heat exchanger 32. The diameter of the cleaning plate 12 is smaller than the diameter of the square hole in the square tube heat exchanger 32 and can enter the square hole in the square tube heat exchanger 32. A cavity 121 is provided in the cleaning plate 12. The upper end of the cleaning plate 12 is fixedly connected to a water supply pipe 14 for adding ammonia water into the cavity 121. The water supply pipe 14 is located at the axis of the cleaning plate 12. The water supply pipe 14 is connected to the cavity 121. The water supply pipe 14 is configured as a corrosion-resistant hose that can hold ammonia water. The water supply pipe 14 is passed through and slidably connected to the upper end side wall of the sealed housing 1.

[0033] A plurality of through holes 122 are provided on the upper end surface of the cleaning disc 12, and the plurality of through holes 122 are connected to the cavity 121. The through holes 122 are arranged around the axis of the cleaning disc 12, and the upper ends of the through holes 122 are inclined toward the side away from the axis of the cleaning disc 12. A spray pipe 123 is provided in the through hole 122, and an elastic bending plate 13 is provided on the spray pipe 123 and the side of the through hole 122 away from the axis of the cleaning disc 12. The elastic bending plate 13 is arranged in an inverted V shape between the inner wall of the through hole 122 and the outer wall of the spray pipe 123, and one end of the elastic bending plate 13 is fixedly connected to the inner wall of the through hole 122, and the other end of the elastic bending plate 13 is fixedly connected to the outer wall of the spray pipe 123.

[0034] Reference Figure 2 , Figure 3 and Figure 4 The sealed housing 1 is provided with a rotating mechanism 15 for driving the cleaning disc 12 to swing back and forth. The rotating mechanism 15 includes a servo motor 151 fixedly connected to the upper end of the sealed housing 1, and the output shaft of the servo motor 151 is perpendicular to the upper end surface of the sealed housing 1. The output shaft of the servo motor 151 is placed in the sealed housing 1, and a connecting rod 152 is fixedly connected to the arc-shaped side wall of the output shaft of the servo motor 151, and the connecting rod 152 is perpendicular to the output shaft of the servo motor 151. A fixing component 153 for fixing the connecting rod 152 and the cleaning disc 12 is provided between the connecting rod 152 and the cleaning disc 12.

[0035] The fixing assembly 153 includes a clamp-shaped block 1531 fixedly connected to the connecting rod 152, the upper thread of the clamp-shaped block 1531 is connected to a fixing bolt 1532, the nut of the fixing bolt 1532 is provided with a hexagonal groove 15321, an adjusting screw 1533 is slidably and rotatably connected to the sealing shell 1, the adjusting screw 1533 is penetrated on the side wall of the sealing shell 1, the rod portion of the adjusting screw 1533 is hexagonally arranged and abuts against the hexagonal groove 15321, and the adjusting screw 1533 is used to drive the fixing bolt 1532 to rotate.

[0036] Then, the adjusting screw 1533 can be moved so that the end of the adjusting screw 1533 abuts against the hexagonal groove 15321, and then the adjusting screw 1533 is rotated, so that the adjusting screw 1533 drives the fixing bolt 1532 to rotate, so that the rod of the fixing bolt 1532 presses the cleaning disc 12 against the clamp block 1531, thereby fixing the cleaning disc 12 and the connecting rod 152.

[0037] Then, high-pressure ammonia water is added into the cavity 121 through the water supply pipe 14, and then the ammonia water enters each spray pipe 123 through the cavity 121, and sprays and cleans the upper inner wall of the sealed shell 1 and the heat exchange tube cleaning nozzle 7 through the spray pipe 123. At the same time, when the ammonia water enters the spray pipe 123, the elastic bending plate 13 will be bent to a certain extent, so that the spray pipe 123 will swing to a certain extent, thereby increasing the spray range of a single spray pipe 123. Then, by controlling the servo motor 151, the servo motor 151 is reciprocated, and then the servo motor 151 drives the connecting rod 152 to swing back and forth, and then the connecting rod 152 drives the cleaning disc 12 to swing back and forth. Further expand the spray area of ​​the spray pipe 123, and at the same time, in the process of the reciprocating swing of the cleaning disc 12, the spray pipe 123 will be affected by inertia and repeatedly press the elastic bending plate 13, so that it will shake to a certain extent, thereby improving the spray uniformity of the single spray pipe 123.

[0038] A threaded hole is provided on the cleaning disc 12, and a driving rod 16 is threadedly connected to the threaded hole. The length direction of the driving rod 16 is parallel to the length direction of the square tube heat exchanger 32. The driving rod 16 is penetrated and slidably connected to the sealed shell 1 and the driving rod 16 can rotate on the sealed shell 1.

[0039] After the top of the sealed shell 1 is cleaned, the driving rod 16 can be rotated to be threaded into the threaded hole and moved downward along the threaded hole, so that the driving rod 16 is fixed to the cleaning disc 12, and then the driving rod 16 is lowered to drive the cleaning disc 12 through one of the square tubes of the multiple square tube heat exchangers 32, and finally the cleaning disc 12 is placed under the square tube heat exchanger 32, and then the driving rod 16 can be rotated to drive the cleaning disc 12 to rotate. At this time, the rotation of the driving rod 16 needs to be opposite to the rotation direction of the driving rod 16 when the driving rod 16 is threaded into the threaded hole. Water is supplied to the cleaning disc 12 through the water supply pipe 14, so that the ammonia water is sprayed on the lower end surface of the square tube heat exchanger 32 through the multiple spray pipes 123, and then the lower end surface of the square tube heat exchanger 32 can be cleaned.

[0040] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A heat exchanger with a cleaning function, characterized in that: The invention comprises a sealing shell (1) fixedly connected to a smoke duct, the lower end of the sealing shell (1) being fixedly connected to a smoke exhaust pipe (2), a heat exchanger body (3) being installed in the sealing shell (1), the lower end of the heat exchanger body (3) being fixedly connected to and in communication with a smoke inlet chamber (4), the smoke inlet chamber (4) being fixedly connected to and in communication with the smoke duct, a waste discharge port (41) being provided at the lower end of the smoke inlet chamber (4), a plugging component (42) for plugging the waste discharge port (41), the upper end of the heat exchanger body (3) and a side away from the smoke duct being connected to the heat exchanger body (3) and the side away from the smoke duct being connected to the heat exchanger body (3). A smoke exhaust passage (5) is formed between the side wall and the inner wall of the sealed shell (1); a damper (6) for blocking the smoke exhaust passage (5) is installed on the smoke exhaust passage (5); a plurality of heat exchange tube cleaning nozzles (7) are fixedly connected to the upper end of the sealed shell (1); the spray ends of the heat exchange tube cleaning nozzles (7) are placed inside the sealed shell (1) and above the heat exchanger body (3); and a side wall nozzle (9) for cleaning the sealed shell (1) and a damper cleaning nozzle (8) for cleaning the damper (6) are also installed on the sealed shell (1).

2. The heat exchanger with cleaning function according to claim 1, characterized in that: The blocking assembly (42) comprises a blocking plate (421) for blocking the lower end of the waste outlet (41); a rotating motor (422) is fixedly connected to the sealing housing (1); an output shaft of the rotating motor (422) passes through the sealing housing (1) and is placed below the waste outlet (41); and the blocking plate (421) is fixedly connected to the arc-shaped side wall of the output shaft of the rotating motor (422).

3. The heat exchanger with cleaning function according to claim 1, characterized in that: Guide blocks (11) are fixedly connected to both side walls of the heat exchanger body (3) adjacent to the gate plate (6); the guide blocks (11) are placed below the side wall nozzles (9); the upper end of the guide blocks (11) is arranged as an inclined surface and the end of the guide blocks (11) close to the gate plate (6) is inclined; the guide blocks (11) are fixedly connected to the side walls of the sealing shell (1) and seal the gap between the heat exchanger body (3) and the sealing shell (1).

4. The heat exchanger with cleaning function according to claim 1, characterized in that: The heat exchanger body (3) comprises a heat-insulating outer shell (31) fixedly connected to a side wall of the sealed shell (1) close to the smoke exhaust passage (5); a square tube heat exchanger (32) is fixedly connected inside the heat-insulating outer shell (31); a water outlet pipe (33) is fixedly connected to the upper part of the square tube heat exchanger (32); and a water inlet pipe (34) is fixedly connected to the lower end of the square tube heat exchanger (32).

5. The heat exchanger with cleaning function according to claim 4, characterized in that: A cleaning plate (12) is provided above the square tube heat exchanger (32), a cavity (121) is provided in the cleaning plate (12), a plurality of through holes (122) are provided on the upper end surface of the cleaning plate (12), the through holes (122) are connected to the cavity (121), the through holes (122) are arranged around the axis of the cleaning plate (12), and the upper ends of the through holes (122) are inclined toward a side away from the axis of the cleaning plate (12), a spray pipe (123) is provided in the through hole (122), and the spray pipe (123) and the through hole (122) are arranged on the same side away from the axis of the cleaning plate (12). An elastic bending plate (13) is provided on the side, the elastic bending plate (13) being arranged in an inverted V shape between the inner wall of the through hole (122) and the outer wall of the spray pipe (123), one end of the elastic bending plate (13) being fixedly connected to the inner wall of the through hole (122), and the other end of the elastic bending plate (13) being fixedly connected to the outer wall of the spray pipe (123), the upper end of the cleaning disc (12) being fixedly connected to a water supply pipe (14) for adding ammonia water into the cavity (121), and a rotating mechanism (15) for driving the cleaning disc (12) to swing back and forth is provided in the sealed housing (1).

6. The heat exchanger with cleaning function according to claim 5, characterized in that: The rotating mechanism (15) comprises a servo motor (151) fixedly connected to the upper end of the sealed housing (1); the output shaft of the servo motor (151) is disposed in the sealed housing (1); a connecting rod (152) is fixedly connected to the arc-shaped side wall of the output shaft of the servo motor (151); the connecting rod (152) is perpendicular to the output shaft of the servo motor (151); and a fixing component (153) for fixing the connecting rod (152) and the cleaning disc (12) is provided between the connecting rod (152) and the cleaning disc (12).

7. The heat exchanger with cleaning function according to claim 6, characterized in that: The fixing assembly (153) comprises a clamp-shaped clamp block (1531) fixedly connected to the connecting rod (152); the upper thread of the clamp-shaped clamp block (1531) is connected to a fixing bolt (1532); a nut of the fixing bolt (1532) is provided with a hexagonal groove (15321); an adjusting screw (1533) is slidably and rotatably connected to the sealing housing (1); a rod portion of the adjusting screw (1533) abuts against the hexagonal groove (15321); and the adjusting screw (1533) is used to drive the fixing bolt (1532) to rotate.

8. The heat exchanger with cleaning function according to claim 7, characterized in that: The cleaning disc (12) is provided with a threaded hole, a driving rod (16) is threadedly connected to the threaded hole, the length direction of the driving rod (16) is parallel to the length direction of the square tube heat exchanger (32), and the driving rod (16) is passed through and slidably connected to the sealed housing (1).

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