Low-temperature waste heat recovery device with water temperature adjusting device

Abstract

The application relates to the technical field of waste heat recovery, and discloses a low-temperature waste heat recovery device with a water temperature adjusting device, which comprises a container body, a transfer box, a heat conduction box and a waste heat box are fixed in sequence from left to right on the lower surface in the container body, the right end of the transfer box is detachably connected with the left end of the heat conduction box through flanges, during use, the temperature of high-temperature flue gas is measured in stages, the flue gas can be repeatedly circulated until the temperature is lower than the utilization mark and the flue gas is discharged, the heat in the flue gas is utilized to a large extent, the high-temperature flue gas is converted into low-temperature waste heat, the low-temperature waste heat flue gas heat is absorbed and utilized, the utilization rate of the waste heat of the flue gas is improved, the device can effectively recover and utilize the low-temperature waste heat flue gas and the high-temperature waste heat flue gas, the waste heat is used for heating medium water in a boiler, an electromagnetic water valve is controlled to open and close, hot water in the boiler is quantitatively discharged and cold water is put into the boiler, and the water temperature in the boiler can be adjusted and controlled.

Description

Technical Field

[0001] This invention relates to the field of waste heat recovery technology, specifically a low-temperature waste heat recovery device with a water temperature regulation device. Background Technology

[0002] Waste heat refers to the sensible and latent heat that has not been rationally utilized in the original design of energy-consuming equipment in industrial enterprises that has been put into operation due to limitations of historical, technological, and conceptual factors. In the process of chemical production, a large amount of high-temperature flue gas is generated. If this high-temperature flue gas is not utilized, it will not only cause energy waste but also cause environmental pollution. When existing waste heat recovery devices recover waste heat, dust in the flue gas will be adsorbed on the inner wall of the guide pipe. If it is not cleaned in time, it will block and corrode the pipe, which will not be conducive to the flow of flue gas. Furthermore, existing devices do not have water temperature control function when recovering waste heat to heat the water medium, and cannot control the temperature. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention provides a low-temperature waste heat recovery device with a water temperature regulation device, which solves the problems mentioned in the background.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the present invention provides the following technical solution: a low-temperature waste heat recovery device with a water temperature regulating device, comprising a container body. From left to right, a transfer box, a heat conduction box, and a waste heat box are sequentially fixed on the lower surface inside the container body. The right end of the transfer box is detachably connected to the left end of the heat conduction box via a flange. The right end of the heat conduction box is detachably connected to the left end of the waste heat box via a flange. Several heat conduction plates are fixed inside the heat conduction box. A boiler is fixed to the top of the heat conduction box. The top ends of the heat conduction plates penetrate into the boiler. A flue gas guide pipe is connected to the right side of the waste heat box. The right end of the flue gas guide pipe penetrates into the right side of the container body. A filter screen is fixed to the right side inside the heat box. A second fan is fixed to the left side of the waste heat box. A solenoid valve is connected to the top of the waste heat box. Below the solenoid valve, a fan is fixed to the upper surface inside the waste heat box. An inlet pipe is connected to the upper left side of the boiler, and an outlet pipe is connected to the lower right side of the boiler. A temperature measuring box is connected to the top of the solenoid valve. A second solenoid valve is connected to the right side of the temperature measuring box. An exhaust pipe is connected to the right end of the second solenoid valve. The right end of the exhaust pipe extends to the right side of the container body. A heat-conducting pipe is installed inside the boiler. The right end of the heat-conducting pipe extends to the right side of the boiler and is connected to the temperature measuring box. The left end of the pipe extends through to the left side of the boiler and is connected to a three-way reversing valve. A second exhaust pipe is fixed to the left end of the three-way reversing valve. The bottom end of the three-way reversing valve is connected to the interior of the transfer box. The left end of the second exhaust pipe extends through to the left side of the container body. Temperature measuring units are installed and fixed on the upper surfaces of the transfer box, the boiler, the temperature measuring box, and the container body. A control console is fixed to the lower left side of the container body. Doors are located at the front and rear of the container body. An arc plate is detachably connected to the bottom of the flue gas guide pipe via bolts. A connecting block is located inside the flue gas guide pipe. Fixed rods are fixed to both the front and rear surfaces. Sleeves are slidably connected to the outer surfaces of the fixed rods. Springs are fixed inside the sleeves. The opposite ends of the two springs are fixedly connected to the opposite ends of the two fixed rods. Scrapers are fixed to the opposite ends of the two sleeves. Fixed plates are symmetrically fixed to the upper surface of the connecting block. Two movable slots are opened on the opposite sides of the two fixed plates. The four movable slots are divided into two groups. Movable rods are movably connected to the two movable slots in each group. A vertical rod is rotatably connected to the outer surface of the movable rod. The top of the vertical rod extends through to the top of the flue gas guide pipe. The vertical rod is slidably connected to the flue gas guide pipe.

[0007] Preferably, the container body has symmetrically fixed shafts inside, and several rollers are rotatably connected to the outer surface of the fixed shafts. Each of the two container doors has a top groove, and a rotating shaft is located inside the top groove. The left and right ends of the rotating shaft extend to the left and right sides of the container door. Two movable slots are opened on the left and right sides of the container body. The left and right ends of the two rotating shafts are respectively located inside the four movable slots and are movably connected to them. A screw is fixed to the outer surface of the rotating shaft inside the top groove. A screw cylinder is threaded to the outer surface of the screw. A worm gear is fixed between the two screw cylinders. A fixed frame is rotatably connected to the outer surface of the screw cylinder. The top end of the fixed frame is fixedly connected to the upper surface of the container body. A motor is fixed to the upper surface of the container body. The bottom end of the motor output shaft extends into the container body and is fixed with a worm gear. The outer surface of the worm gear meshes with the worm gear.

[0008] Preferably, an operating rod is rotatably connected to the top of the front vertical rod, and a slot is provided on the right side of the top of the rear vertical rod, with the operating rod engaging with the slot.

[0009] Preferably, a rubber sleeve is fixed to the outer surface of the operating rod.

[0010] Preferably, both the inlet pipe and the outlet pipe are equipped with electromagnetic water valves at opposite ends, the inlet pipe is connected to an external water supply pipe, and the outlet pipe is connected to an external water supply pipe.

[0011] Preferably, the console includes a control panel, a PLC controller, and a processor.

[0012] Preferably, the outer surface of the scraper is in contact with the inner wall of the flue gas guide pipe.

[0013] Preferably, the heat pipe has a spiral structure.

[0014] Preferably, the top of the door has an arc-shaped structure.

[0015] Preferably, the four temperature measuring units, the three-way reversing valve, the second electromagnetic valve, the first electromagnetic valve, the second fan, the first fan, the motor, and the electromagnetic water valve are all electrically connected to the control console.

[0016] (III) Beneficial Effects

[0017] This invention provides a low-temperature waste heat recovery device with a water temperature regulation device, which has the following beneficial effects:

[0018] (1) In the process of using this invention, by installing the waste heat recovery structure inside the container, the device can be integrated, making the container a self-contained machine room, which can be directly placed in the open environment for use; the device measures the temperature of the high-temperature flue gas in stages, so that the usable flue gas can be repeatedly circulated until the temperature is lower than the utilization standard before discharge, making full use of the heat in the flue gas, converting the high-temperature flue gas into low-temperature waste heat, and then absorbing and utilizing the heat of the low-temperature waste heat flue gas, thereby improving the utilization rate of the flue gas waste heat, so that the device can effectively utilize both low-temperature waste heat flue gas and high-temperature waste heat flue gas; and the waste heat is used to heat the medium water in the boiler, control the opening and closing of the electromagnetic water valve, and quantitatively release hot water and add cold water in the boiler, thereby regulating and controlling the water temperature in the boiler.

[0019] (2) By setting up an arc plate, connecting block, fixing rod, sleeve, scraper, spring, fixing plate, movable groove one, movable rod one, vertical rod, slot and operating rod, the present invention enables maintenance personnel to flexibly clean the dust attached to the inner wall of the flue gas guide pipe, prevent dust from causing the flue gas guide pipe to age and block, and improve the service life of the flue gas guide pipe and the flue gas flow speed.

[0020] (3) During the use of this invention, when the temperature measuring unit inside the container detects that the inside of the container is too high, the control console will control the motor to operate, drive the worm gear to rotate, and drive the two screw barrels to rotate, causing the two screws to move and retract relative to each other. Under the pull of the screws, the two rotating shafts move inward, driving the container door to move inward. However, under the limit of the roller, the container door moves and rotates around the rotating shaft. Finally, the container door is fully opened and is parallel to the ground, so that the container can be opened and connected from front to back, allowing for large-area heat dissipation and preventing the machine room from overheating and causing damage to the internal structure. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the right-side cross-sectional structure of the flue gas guide pipe in this invention;

[0023] Figure 3 This is a schematic diagram of the side section structure of the container body in this invention;

[0024] Figure 4 This is a three-dimensional structural diagram of the present invention.

[0025] In the diagram: 1. Container body; 2. Heat transfer box; 3. Boiler; 4. Heat transfer plate; 5. Transfer box; 6. Waste heat box; 7. Flue gas guide pipe; 8. Filter screen; 9. Fan 1; 10. Fan 2; 11. Water inlet pipe; 12. Water outlet pipe; 13. Solenoid valve 1; 14. Temperature measuring box; 15. Solenoid valve 2; 16. Exhaust pipe 1; 17. Heat transfer pipe; 18. Three-way reversing valve; 19. Exhaust pipe 2; 20. Temperature measuring unit; 21. Control console; 22. Container door; 23. Arc plate; 24. Connecting block; 25. Fixing rod; 26. Sleeve; 27. Scraper; 28. Spring; 29. ​​Fixing plate; 30. Movable groove one; 31. Movable rod one; 32. Vertical rod; 33. Slot; 34. Operating rod; 35. Fixed shaft; 36. Roller; 37. Top groove; 38. Rotating shaft; 39. Movable groove two; 40. Screw; 41. Screw barrel; 42. Fixing frame; 43. Worm gear; 44. Motor; 45. Worm; 46. Solenoid water valve. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] like Figure 1-4As shown, the present invention provides a technical solution: a low-temperature waste heat recovery device with a water temperature regulating device, comprising a container body 1. A transfer box 5, a heat conduction box 2, and a waste heat box 6 are fixed sequentially from left to right on the lower surface inside the container body 1. The right end of the transfer box 5 is detachably connected to the left end of the heat conduction box 2 via a flange. The right end of the heat conduction box 2 is detachably connected to the left end of the waste heat box 6 via a flange. Several heat conduction plates 4 are fixed inside the heat conduction box 2. A boiler 3 is fixed to the top of the heat conduction box 2, with the top of the heat conduction plates 4 penetrating into the boiler 3. A flue gas guide pipe 7 is connected to the right side of the waste heat box 6, with the right end of the flue gas guide pipe 7 penetrating into the right side of the container body 1. A filter screen 8 is fixed to the right side inside the waste heat box 6. A second fan 10 is fixed to the left side of the waste heat box 6. An electromagnetic valve 13 is connected to the top of the waste heat box 6. Below the first 13, a fan 9 is fixed on the upper surface inside the waste heat box 6. A water inlet pipe 11 is connected to the upper left side of the boiler 3, and a water outlet pipe 12 is connected to the lower right side of the boiler 3. A temperature measuring box 14 is connected to the top of the first electromagnetic valve 13. A second electromagnetic valve 15 is connected to the right side of the temperature measuring box 14. An exhaust pipe 16 is connected to the right end of the second electromagnetic valve 15. The right end of the exhaust pipe 16 extends to the right side of the container body 1. A heat-conducting pipe 17 is installed inside the boiler 3. The right end of the heat-conducting pipe 17 extends to the right side of the boiler 3 and is connected to the temperature measuring box 14. The left end of the heat-conducting pipe 17 extends to the left side of the boiler 3 and is connected to a three-way reversing valve 18. An exhaust pipe 19 is fixed to the left end of the three-way reversing valve 18. The bottom end of the three-way reversing valve 18 is connected to the inside of the transfer box 5. The left end of the exhaust pipe 19 extends to the container body 1. Temperature measuring units 20 are fixedly installed on the upper surface of the transfer container 5, the upper surface of the boiler 3, the upper surface of the temperature measuring box 14, and the upper surface of the container body 1 on the left side of the container body 1. A control console 21 is fixedly installed on the lower left side of the container body 1. Doors 22 are provided at the front and rear of the container body 1. An arc plate 23 is detachably connected to the bottom of the flue gas guide pipe 7 via bolts. A connecting block 24 is provided inside the flue gas guide pipe 7. Fixing rods 25 are fixed to the front and rear surfaces of the connecting block 24. Sleeves 26 are slidably connected to the outer surface of the fixing rods 25. Springs 28 are fixed inside the sleeves 26. The opposite ends of the two springs 28 are fixedly connected to the opposite ends of the two fixing rods 25. Scraper strips 27 are fixed to the opposite ends of the two sleeves 26. Fixing plates 29 are symmetrically fixed to the upper surface of the connecting block 24. Each fixed plate 29 has two movable slots 30 on opposite sides. The four movable slots 30 are divided into two groups. Each group of two movable slots 30 is internally connected to a movable rod 31. A vertical rod 32 is rotatably connected to the outer surface of the movable rod 31. The top of the vertical rod 32 extends above the flue gas guide pipe 7. The vertical rod 32 is slidably connected to the flue gas guide pipe 7. High-temperature flue gas enters the waste heat box 6 through the flue gas guide pipe 7. The filter screen 8 filters dust from the flue gas, allowing the high-temperature airflow to enter the heat transfer box 2, heating the heat transfer plate 4 and transferring the heat to the water medium inside the boiler 3 for heating. The released airflow enters the transfer box 5, where the internal temperature measuring unit 20 monitors the temperature. When the temperature is lower than the utilization standard, the three-way reversing valve 18 connects the transfer box 5 to the exhaust pipe 19.When gas is discharged, if the gas temperature is usable, the three-way reversing valve 18 connects the transfer box 5 to the heat pipe 17. The gas enters the heat pipe 17 to release heat and then enters the temperature measuring box 14, where the temperature measuring unit 20 detects the gas temperature. If the temperature is lower than the utilization standard, the second solenoid valve 15 opens, and the gas is discharged through the first exhaust pipe 16. If the gas temperature is usable, the first solenoid valve 13 opens separately, and the gas enters the waste heat box 6 to circulate with the newly entered flue gas, maximizing the utilization of the heat in the flue gas. The control console 21 has a preset control program that can automatically adjust the solenoid valve, the three-way reversing valve 18, and the temperature measuring unit 20 according to the above process. The control unit 20 connects to the container body 1. When the temperature measuring unit 20 inside the container body 1 detects that the internal temperature of the container body 1 is too high, the control console 21 controls the motor 44 to operate, driving the worm gear 45 to rotate. This causes the worm wheel 43 to drive the two screw barrels 41 to rotate, causing the two screws 40 to move and retract relative to each other. Under the pull of the screws 40, the two rotating shafts 38 move inward, driving the container door 22 to move inward. However, under the limit of the roller 36, the container door 22 moves and rotates around the rotating shaft 38 as the center. Finally, the container door 22 is fully opened and parallel to the ground, allowing the container body 1 to open open from front to back, enabling large-area heat dissipation and preventing overheating damage to the internal structure of the machine room.

[0028] Furthermore, symmetrical fixed shafts 35 are fixed inside the container body 1. Several rollers 36 are rotatably connected to the outer surface of the fixed shafts 35. Top grooves 37 are opened at the top of both doors 22. Rotating shafts 38 are installed inside the top grooves 37. The left and right ends of the rotating shafts 38 extend to the left and right sides of the doors 22. Two movable slots 39 are opened on the left and right sides inside the container body 1. The left and right ends of the two rotating shafts 38 are located inside the four movable slots 39 respectively and are movably connected to the inside of the movable slots 39. A screw 40 is fixed inside the top groove 37 on the outer surface of the rotating shaft 38. A screw barrel 41 is threadedly connected to the outer surface of the screw 40. A worm gear 43 is fixed between the two screw barrels 41. A fixed frame 42 is rotatably connected to the outer surface of the screw barrel 41. The top of the fixed frame 42 is fixedly connected to the upper surface inside the container body 1. The upper surface of the container body 1 is fixed. There is a motor 44, the bottom end of the output shaft of the motor 44 passes through the interior of the container body 1, and a worm gear 45 is fixed thereon. The outer surface of the worm gear 45 is meshed with the worm wheel 43. After long-term use, soot will adhere to the inner wall of the flue gas guide pipe 7 due to the long-term passage of flue gas. Personnel can press down and lift the operating rod 34 to make the two scraper blades 27 scrape the inner wall of the flue gas guide pipe 7. Under the push of the spring 28, the scraper blades 27 always stick to the inner wall of the flue gas guide pipe 7. The operating rod 34 can be rotated to disengage from the slot 33. At this time, different vertical rods 32 can be lifted or pressed down respectively. The movable rod 31 moves in the movable slot 30, so that the two fixed rods 25 are no longer kept horizontal, but rotate and tilt, which can achieve a better cleaning effect on the inner wall of the flue gas guide pipe 7. After cleaning, the dust can be removed by turning the bolt and opening the arc plate 23.

[0029] Furthermore, an operating lever 34 is rotatably connected to the top of the front vertical rod 32, and a slot 33 is provided on the right side of the top of the rear vertical rod 32. The operating lever 34 engages with the slot 33. By pulling or pressing the operating lever 34, both vertical rods 32 can be moved simultaneously. When it is necessary to move a single vertical rod 32, the operating lever 34 can be rotated to disengage it from the slot 33.

[0030] Furthermore, a rubber sleeve is fixed to the outer surface of the operating lever 34, making it more comfortable for personnel to lift and press the operating lever 34.

[0031] Furthermore, electromagnetic water valves 46 are installed at opposite ends of the inlet pipe 11 and the outlet pipe 12. The inlet pipe 11 is connected to the external water supply pipe, and the outlet pipe 12 is connected to the external water pipe. When the left electromagnetic water valve 46 is turned on, the water supply pipe delivers water to the boiler 3. When the right electromagnetic water valve 46 is turned on, heated water flows into the water pipe. The temperature measuring unit 20 inside the boiler 3 detects the temperature inside the boiler 3 in real time and displays it through the control console 21. The water temperature can be adjusted under the control of the control console 21. When the water temperature is too high, the right electromagnetic water valve 46 opens to discharge a certain amount of hot water and then closes. The left electromagnetic water valve 46 opens to input a certain amount of room temperature water and then closes, thereby regulating the water temperature inside the boiler 3.

[0032] Furthermore, the console 21 includes a control panel, a PLC controller, and a processor. Personnel can operate the equipment through the control panel. The PLC controller controls and manages electrical units such as the temperature measuring unit 20, the three-way reversing valve 18, and the solenoid valve 15. The processor analyzes the temperature information and issues instructions to the PLC controller.

[0033] Furthermore, the outer surface of the scraper 27 is in contact with the inner wall of the flue gas guide pipe 7, and the scraper 27 can scrape off the dust from the inner wall of the flue gas guide pipe 7 when it moves.

[0034] Furthermore, the heat pipe 17 has a spiral structure, which can conduct heat better.

[0035] Furthermore, the top of the door 22 has an arc-shaped structure, so that it will not be obstructed when it is turned open.

[0036] Furthermore, the four temperature measuring units 20, the three-way reversing valve 18, the second solenoid valve 15, the first solenoid valve 13, the second fan 10, the first fan 9, the motor 44, and the solenoid water valve 46 are all electrically connected to the control console 21. The control console 21 can control the three-way reversing valve 18, the second solenoid valve 15, the first solenoid valve 13, the second fan 10, the first fan 9, the motor 44, and the solenoid water valve 46. The temperature measuring units 20 transmit the real-time temperature to the control console 21.

[0037] In summary, the workflow of this invention is as follows: High-temperature flue gas enters the waste heat box 6 through the flue gas guide pipe 7. The filter screen 8 filters the dust in the flue gas, allowing the high-temperature airflow to enter the heat transfer box 2, heating the heat transfer plate 4 and transferring the heat to the medium water inside the boiler 3 for heating. The released airflow enters the transfer box 5, where the internal temperature measuring unit 20 monitors the temperature. When the temperature is lower than the utilization standard, the three-way reversing valve 18 connects the transfer box 5 to the exhaust pipe 19, allowing the gas to be discharged. When the gas temperature is usable, the three-way reversing valve 18 connects the transfer box 5 to the heat transfer pipe 17, allowing the gas to enter the heat transfer pipe 17 for heat release and then enter the temperature measuring box 14, where the temperature measuring unit 20 detects the gas temperature. When the temperature is below the standard, solenoid valve 15 opens and the gas is discharged through exhaust pipe 16. When the gas temperature is usable, solenoid valve 13 opens separately, and the gas enters the waste heat box 6 to circulate with the newly entered flue gas, maximizing the utilization of the heat in the flue gas. Simultaneously, the temperature measuring unit 20 inside the boiler 3 monitors the temperature in real time and displays it on the control panel 21. The water temperature can be adjusted under the control of the control panel 21. When the water temperature is too high, the right solenoid water valve 46 opens to discharge a certain amount of hot water and then closes; the left solenoid water valve 46 opens to input a certain amount of room temperature water and then closes, thus regulating the water temperature inside the boiler 3. The control panel 21 has a preset control program. The system automatically controls the connection of the solenoid valve, three-way reversing valve 18, temperature measuring unit 20, and solenoid water valve 46 according to the above process. When the temperature measuring unit 20 inside the container body 1 detects that the internal temperature of the container body 1 is too high, the control console 21 controls the motor 44 to operate, driving the worm gear 45 to rotate, causing the worm wheel 43 to drive the two screw barrels 41 to rotate, causing the two screws 40 to move and retract relative to each other. Under the pull of the screws 40, the two rotating shafts 38 move inward, driving the container door 22 to move inward. However, under the limit of the roller 36, the container door 22 moves and rotates around the rotating shaft 38 as the center. Finally, the container door 22 is fully opened and parallel to the ground, allowing the container body 1 to open open from front to back, enabling large-area heat dissipation. To prevent overheating of the machine room and damage to the internal structure; after prolonged use, soot will adhere to the inner wall of the flue gas guide pipe 7 due to the long-term passage of flue gas. Personnel can use the operating lever 34 to press down and lift up to make the two scraper blades 27 scrape the inner wall of the flue gas guide pipe 7. Under the push of the spring 28, the scraper blades 27 always stick to the inner wall of the flue gas guide pipe 7. The operating lever 34 can be rotated to disengage from the slot 33. At this time, different vertical rods 32 can be lifted up or pressed down respectively. The movable rod 31 moves in the movable slot 30, so that the two fixed rods 25 are no longer kept horizontal, but rotate and tilt, which can achieve a better cleaning effect on the inner wall of the flue gas guide pipe 7. After cleaning, the dust can be removed by turning the bolt and opening the arc plate 23.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-temperature waste heat recovery device with a water temperature regulation device, comprising a container body (1), characterized in that: The lower surface of the container body (1) is fixed from left to right with a transfer box (5), a heat conduction box (2), and a waste heat box (6). The right end of the transfer box (5) is detachably connected to the left end of the heat conduction box (2) via a flange. The right end of the heat conduction box (2) is detachably connected to the left end of the waste heat box (6) via a flange. Several heat conduction plates (4) are fixed inside the heat conduction box (2). A boiler (3) is fixed on the top of the heat conduction box (2). The top of the heat conduction plate (4) extends into the boiler (3). A flue gas guide pipe (7) is connected to the right side of the waste heat box (6). The right end of the flue gas guide pipe (7) extends into the right side of the container body (1). A filter screen (8) is fixed on the right side inside the waste heat box (6). The left side of the waste heat box (6) is... A second fan (10) is fixedly mounted. A first electromagnetic valve (13) is connected to the top of the waste heat box (6). A first fan (9) is fixed below the first electromagnetic valve (13) on the upper surface inside the waste heat box (6). A water inlet pipe (11) is connected to the upper left side of the boiler (3). A water outlet pipe (12) is connected to the lower right side of the boiler (3). A temperature measuring box (14) is connected to the top of the first electromagnetic valve (13). A second electromagnetic valve (15) is connected to the right side of the temperature measuring box (14). An exhaust pipe (16) is connected to the right end of the second electromagnetic valve (15). The right end of the exhaust pipe (16) extends through to the right side of the container body (1). A heat conduction pipe (17) is provided inside the boiler (3). The right end of the heat conduction pipe (17) extends through to the right side of the container body (1). The heat pipe (17) extends to the right side of the boiler (3) and is connected to the temperature measuring box (14). The left end of the heat pipe (17) extends to the left side of the boiler (3) and is connected to a three-way reversing valve (18). The left end of the three-way reversing valve (18) is fixed with an exhaust pipe (19). The bottom end of the three-way reversing valve (18) is connected to the inside of the transfer box (5). The left end of the exhaust pipe (19) extends to the left side of the container body (1). Temperature measuring units (20) are installed and fixed on the upper surface inside the transfer box (5), the upper surface inside the boiler (3), the upper surface inside the temperature measuring box (14), and the upper surface inside the container body (1). A control console (21) is fixed on the lower left side of the container body (1). The interior is equipped with doors (22) at both the front and back. The bottom of the flue gas guide pipe (7) is connected to an arc plate (23) by bolts. The flue gas guide pipe (7) is equipped with a connecting block (24). The front and back surfaces of the connecting block (24) are fixed with fixing rods (25). The outer surface of the fixing rods (25) is slidably connected with sleeves (26). The sleeves (26) are fixed with springs (28). The opposite ends of the two springs (28) are fixedly connected to the opposite ends of the two fixing rods (25). The opposite ends of the two sleeves (26) are fixed with scrapers (27). The upper surface of the connecting block (24) is symmetrically fixed with fixing plates (29). The opposite sides of the two fixing plates (29) are provided with two movable slots (30).The four movable slots (30) are divided into two groups. Each group of two movable slots (30) is connected to a movable rod (31). A vertical rod (32) is rotatably connected to the outer surface of the movable rod (31). The top of the vertical rod (32) extends through to the top of the flue gas guide pipe (7). The vertical rod (32) is slidably connected to the flue gas guide pipe (7). The container body (1) is symmetrically fixed with fixed shafts (35). Several rollers (36) are rotatably connected to the outer surface of the fixed shafts (35). The top of each of the two doors (22) is provided with a top groove (37). A rotating shaft (38) is provided inside the top groove (37). The left and right ends of the rotating shaft (38) extend through to the left and right sides of the door (22). The left and right sides of the container body (1) are provided with two movable slots (39). The left and right ends of the two rotating shafts (38) are located inside the four movable slots (39) and are movably connected to the inside of the movable slots (39). The outer surface of the rotating shaft (38) is fixed with a screw (40) inside the top groove (37). The outer surface of the screw (40) is threaded with a screw barrel (41). A worm gear (43) is fixed between the two screw barrels (41). A fixing frame (42) is rotatably connected to the outer surface of the screw barrel (41). The top of the fixing frame (42) is fixedly connected to the upper surface inside the container body (1). A motor (44) is fixed to the upper surface of the container body (1). The bottom end of the output shaft penetrates into the interior of the container body (1) and is fixed with a worm gear (45). The outer surface of the worm gear (45) meshes with the worm wheel (43). An operating rod (34) is rotatably connected to the top of the vertical rod (32) at the front. A slot (33) is opened on the right side of the top of the vertical rod (32) at the rear. The operating rod (34) engages with the slot (33). The outer surface of the scraper (27) is in contact with the inner wall of the flue gas guide pipe (7).

2. The low-temperature waste heat recovery device with water temperature regulation device according to claim 1, characterized in that: A rubber sleeve is fixed to the outer surface of the operating lever (34).

3. A low-temperature waste heat recovery device with a water temperature regulating device according to claim 2, characterized in that: Electromagnetic water valves (46) are installed at opposite ends of the water inlet pipe (11) and the water outlet pipe (12). The water inlet pipe (11) is connected to an external water supply pipe, and the water outlet pipe (12) is connected to an external water supply pipe.

4. A low-temperature waste heat recovery device with a water temperature regulating device according to claim 1, characterized in that: The console (21) includes a control panel, a PLC controller, and a processor.

5. A low-temperature waste heat recovery device with a water temperature regulating device according to claim 1, characterized in that: The heat pipe (17) has a spiral structure.

6. A low-temperature waste heat recovery device with a water temperature regulating device according to claim 1, characterized in that: The top of the door (22) is an arc-shaped structure.

7. A low-temperature waste heat recovery device with a water temperature regulating device according to claim 3, characterized in that: The four temperature measuring units (20), the three-way reversing valve (18), the second electromagnetic valve (15), the first electromagnetic valve (13), the second fan (10), the first fan (9), the motor (44), and the electromagnetic water valve (46) are all electrically connected to the control console (21).

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