Waste heat recovery device and energy-saving pressure container

Abstract

The invention discloses a waste heat recovery device and an energy-saving pressure container, and relates to the technical field of waste heat recovery devices.The waste heat recovery device comprises a heat recovery tank, a water adding opening is formed in the top of the heat recovery tank, the right side of the heat recovery tank is fixedly communicated with a water outlet pipe, and a second valve is fixedly installed on the water outlet pipe; the waste heat recovery device further comprises a heat exchange pipe, the heat exchange pipe is arranged in the heat recovery tank, and the top end and the bottom end of the heat exchange pipe penetrate through the inner wall of the top of the heat recovery tank and the inner wall of the bottom of the heat recovery tank correspondingly and extend out of the heat recovery tank. The energy-saving effect is obvious; the heat exchange tubes rotate to break water temperature layering, increase contact frequency, prevent impurity deposition and improve heat exchange efficiency; the filtering assembly intercepts large-particle-size solid particles, and the environmental protection property is good; the installation assembly is accurate in positioning, the filter screen is convenient to replace, and practicability is high.

Description

Technical Field

[0001] This invention relates to the field of waste heat recovery devices, and more particularly to a waste heat recovery device and an energy-saving pressure vessel. Background Technology

[0002] A pressure vessel is a sealed device that holds gas or liquid under pressure. When a boiler pressure vessel is in operation, water is added, and the steam generated after high-temperature heating is used for heating. After this process, wastewater needs to be discharged. However, this wastewater contains a large amount of residual heat and impurities, and direct discharge would result in resource waste and pollution, which is detrimental to energy conservation and environmental protection. Therefore, waste heat recovery devices are needed to recover the residual heat.

[0003] In the existing technology, the utilization rate of waste heat recovery devices for boiler pressure vessel blowdown is insufficient during use, and the heating efficiency of waste heat to water is low, resulting in poor energy-saving effect. In addition, the heat exchange pipes inside the boiler pressure vessel blowdown waste heat recovery device are prone to accumulating impurities after long-term use, which reduces the thermal conductivity of the heat exchange pipes and seriously affects the heat exchange efficiency, resulting in low waste heat recovery rate and poor environmental protection due to direct discharge of wastewater impurities. Therefore, this application proposes a waste heat recovery device and an energy-saving pressure vessel to solve the above problems. Summary of the Invention

[0004] The purpose of this application is to provide a waste heat recovery device and an energy-saving pressure vessel to solve the problems mentioned in the background art, such as the need to improve the utilization rate of waste heat in existing boiler pressure vessel waste heat recovery devices during use, the low efficiency of waste heat heating water, poor energy-saving effect, and the easy accumulation of impurities in the heat exchange pipes inside the boiler pressure vessel waste heat recovery device after long-term use, which reduces the thermal conductivity of the heat exchange pipes, seriously affects the heat exchange efficiency, and results in low waste heat recovery rate and poor environmental protection due to direct discharge of wastewater impurities.

[0005] To achieve the above objectives, this application provides the following technical solution: a waste heat recovery device and an energy-saving pressure vessel, comprising a heat recovery tank, wherein a water inlet is provided at the top of the heat recovery tank, and a water outlet pipe is fixedly connected to the right side of the heat recovery tank, and a second valve is fixedly installed on the water outlet pipe; the waste heat recovery device further includes:

[0006] A heat exchange tube is installed inside the heat recovery tank. The top and bottom ends of the heat exchange tube penetrate the top inner wall and bottom inner wall of the heat recovery tank, respectively, and extend to the outside of the heat recovery tank. The top and bottom ends of the heat exchange tube are rotatably connected to an inlet pipe and a drain pipe, respectively. A first valve is fixedly installed on both the inlet pipe and the drain pipe.

[0007] The drive assembly is used to drive the heat exchange tube to rotate, thereby agitating the water flow inside the heat recovery tank and improving the heat exchange efficiency. The drive assembly includes a motor, a first gear, and a second gear. The motor is fixedly installed on the top of the heat recovery tank, the first gear is fixedly installed on the output shaft of the sub-motor, and the second gear is fixedly sleeved on the heat exchange tube and meshes with the first gear.

[0008] A filter assembly is located on the left side of the heat recovery tank. The filter assembly is in conjunction with the inlet pipe and is used to filter the wastewater discharged from the pressure vessel.

[0009] The mounting assembly is located at the rear of the filter box and cooperates with two rotating rods respectively. The mounting assembly is used to stably fix the filter screen.

[0010] With the above structure, the heat exchange tube rotates inside the heat recovery tank. The motor in the drive assembly drives the first and second gears to rotate the heat exchange tube, agitating the water flow in the heat recovery tank, breaking up water temperature stratification, and promoting uniform heat transfer, thereby improving heat exchange efficiency and enhancing waste heat utilization. The filter assembly is connected to the inlet pipe to pre-filter the sewage discharged from the pressure vessel, removing impurities and preventing dirt from entering the heat exchange tube and causing blockage or scale buildup, thus maintaining the thermal conductivity of the heat exchange tube. The mounting assembly cooperates with the filter box to ensure the filter screen is stably fixed, avoiding loosening during the filtration process, and improving the reliability and continuity of the entire device. These improvements directly address the problems of low waste heat utilization and poor heating efficiency, while reducing impurity emissions through filtration, thus improving environmental friendliness.

[0011] Preferably, sealing flanges are fixedly installed on the top inner wall and the bottom inner wall of the heat recovery tank, and both sealing flanges are rotatably connected to the heat exchange tube.

[0012] Furthermore, by fixing the sealing flange to the inner walls of the top and bottom of the heat recovery tank and rotating the heat exchange tube, an effective sealing barrier is provided to prevent water inside the heat recovery tank from leaking when the heat exchange tube rotates, ensuring the tank's airtightness. At the same time, it allows the heat exchange tube to rotate smoothly, supporting the normal operation of the drive components, maintaining the integrity of the device structure, and reducing energy loss. This helps maintain a stable heat exchange environment, avoids heat loss due to leakage, and thus indirectly improves the waste heat recovery efficiency.

[0013] Preferably, a rotary joint is fixedly installed at both the top and bottom of the heat exchange tube, and the two rotary joints are respectively fixedly installed at one end of the liquid inlet pipe and one end of the liquid outlet pipe;

[0014] Furthermore, by installing rotary joints at the top and bottom of the heat exchange tubes and connecting them to the inlet and outlet pipes respectively, the inlet and outlet pipes remain stationary when the heat exchange tubes rotate, preventing pipe twisting or breakage and ensuring smooth entry and exit of wastewater into and out of the heat exchange tubes, thus maintaining a continuous heat exchange process. This reduces the risk of mechanical failure, improves the durability of the device, and ensures that the rotation of the heat exchange tubes is not restricted by the pipes, fully utilizing the effect of agitating the water flow and further improving heat exchange efficiency.

[0015] Preferably, a pressure relief valve is fixedly installed on the top of the heat recovery tank, and the pressure relief valve is connected to the interior of the heat recovery tank;

[0016] Furthermore, by fixing the pressure relief valve to the top of the heat recovery tank and connecting it to the inside, when the heat recovery tank generates excessive pressure due to heating, the pressure relief valve automatically opens to release the pressure, preventing the tank from bursting or being damaged, ensuring operational safety, extending the service life of the device, avoiding unexpected shutdowns caused by pressure accumulation, ensuring the stable operation of the waste heat recovery process, and thus supporting continuous energy-saving effects.

[0017] Preferably, the heat recovery tank is fixedly installed with fixing rods at both the top and bottom, and the two fixing rods are respectively fixedly installed on the inlet pipe and the outlet pipe;

[0018] Furthermore, by connecting the heat recovery tank to the inlet and outlet pipes with fixing rods, additional support and fixation are provided, reducing vibration or displacement of the inlet and outlet pipes during operation, keeping the pipes aligned, and preventing loosening or leakage at the connections. This enhances the overall structural stability, ensures smooth sewage flow, and avoids affecting the rotation and heat exchange of the heat exchange tubes due to pipe shaking, indirectly improving heat exchange efficiency and device reliability.

[0019] Preferably, the filtration assembly includes a first water pipe, a filter box, a second water pipe, a pressure plate, a filter screen, and two rotating rods. One end of the first water pipe is fixedly connected to one end of the inlet pipe, and the other end of the first water pipe is fixedly connected to the bottom of the filter box. One end of the second water pipe is fixedly connected to the top of the filter box. The rear end of the filter screen can be detached and inserted into the interior of the filter box. The pressure plate is installed at the front end of the filter screen and cooperates with the front side of the filter box. The front ends of the two rotating rods are respectively rotatably connected to the left and right ends of the pressure plate, and the rear ends of the two rotating rods are located on the rear side of the filter box.

[0020] Furthermore, the filtration assembly includes a first water pipe, a filter box, a second water pipe, a pressure plate, a filter screen, and two rotating rods. Wastewater enters the filter box from the pressure vessel through the second water pipe. After being filtered by the filter screen, the clean liquid flows through the first water pipe to the inlet pipe, effectively intercepting impurities and preventing dirt from accumulating in the heat exchange tubes, thus avoiding a decrease in the heat transfer performance of the heat exchange tubes. This directly solves the problem of low heat exchange efficiency caused by impurity accumulation. At the same time, the filtered wastewater discharge is more environmentally friendly, improving the waste heat recovery rate.

[0021] Preferably, an installation hole is provided on the inner wall of the front side of the filter box, the rear end of the filter screen passes through the installation hole and is slidably connected to the installation hole, a sealing ring is fixedly installed on the front side of the filter box, the sealing ring is sleeved on the installation hole, and the rear side of the pressure plate is in contact with the sealing ring.

[0022] Furthermore, by placing the mounting hole and sealing ring on the front side of the filter box, the filter screen is slidably inserted into the filter box through the mounting hole, and the sealing ring is fitted onto the mounting hole and contacts the pressure plate to form a tight seal, preventing sewage from leaking from the front side of the filter box and ensuring that the filtration process is carried out in a closed manner. This avoids the overflow of impurities or liquid loss, maintains stable filtration effect, supports the long-term reliable operation of the filter assembly, and thus protects the heat exchange tube from contamination.

[0023] Preferably, the installation assembly includes a screw, a moving rod, two sliding sleeves, two positioning rods, a connecting rod, two springs, and an operating rod. One end of the screw is rotatably connected to the rear side of the filter box. The moving rod is threaded onto the screw. The two sliding sleeves are respectively fixedly installed at both ends of the moving rod and slidably fitted onto the corresponding positioning rods. Both moving rods have positioning holes. The rear ends of the positioning rods can be disengaged and inserted into the corresponding positioning holes. The connecting rods are respectively fixedly installed at the front ends of the two positioning rods. The springs are fitted onto the corresponding positioning rods. The front ends of the springs are fixedly installed on the connecting rods, and the rear ends of the springs are fixedly installed on the corresponding sliding sleeves. The operating rod is fixedly installed on the top of the connecting rod.

[0024] Furthermore, the installation components work together through a screw, a moving rod, a sliding sleeve, a positioning rod, a connecting rod, a spring, and an operating rod. The operating rod moves the connecting rod, causing the positioning rod to insert into or disengage from the positioning hole of the rotating rod. The spring provides a restoring force to ensure a firm positioning, enabling quick installation and removal of the filter screen. This facilitates regular cleaning or replacement of the filter screen, preventing filter screen clogging from affecting the filtration effect. This reduces maintenance difficulty, maintains the efficient operation of the filter components, and indirectly improves the heat exchange efficiency of the heat exchange tubes and the energy efficiency of the device.

[0025] Preferably, two stabilizing rods are fixedly installed on the rear side of the filter box, and two stabilizing rings are fixedly installed on the bottom of the connecting rod, with the stabilizing rings slidably sleeved on the corresponding stabilizing rods;

[0026] Furthermore, the filter box and connecting rod are connected by a stabilizing rod and a stabilizing ring. The stabilizing ring is slidably fitted on the stabilizing rod, guiding the connecting rod and positioning rod to move smoothly and preventing the positioning rod from shifting or getting stuck during operation. This ensures that the installation components accurately and reliably fix the filter screen, which enhances the stability of the installation components, reduces operational errors, supports the continuous and effective operation of the filter components, and thus maintains the heat exchange performance of the entire waste heat recovery device.

[0027] Preferably, one end of the second water pipe is fixedly connected to the drain port of the pressure vessel;

[0028] Furthermore, the energy-saving pressure vessel integrates the aforementioned waste heat recovery device. A second water pipe connects to the pressure vessel's drain outlet, introducing the discharged wastewater into the filter assembly and heat exchange tubes. The waste heat from the wastewater is used to heat the water in the heat recovery tank, achieving energy recovery, reducing heat waste, and improving energy utilization. At the same time, the filter assembly removes impurities from the wastewater, avoiding environmental pollution. This directly addresses the issues of low waste heat recovery rate and poor environmental performance, comprehensively improving the energy-saving effect and sustainability of the pressure vessel.

[0029] The beneficial effects of this invention are:

[0030] 1. By setting the heat exchange tube to rotate inside the heat recovery tank, the motor in the drive assembly drives the first and second gears to rotate the heat exchange tube, agitating the water flow in the heat recovery tank, breaking up water temperature stratification, promoting uniform heat transfer, thereby improving heat exchange efficiency and enhancing waste heat utilization. The filter assembly is connected to the liquid inlet pipe to pre-filter the sewage discharged from the pressure vessel, removing impurities and preventing dirt from entering the heat exchange tube and causing blockage or scale buildup, maintaining the thermal conductivity of the heat exchange tube. The installation assembly cooperates with the filter box to ensure the filter screen is stably fixed, avoiding loosening during the filtration process, improving the reliability and continuity of the entire device. These improvements directly address the problems of low waste heat utilization and poor heating efficiency, while reducing impurity emissions through filtration, thus improving environmental friendliness.

[0031] 2. The filtration assembly includes a first water pipe, a filter box, a second water pipe, a pressure plate, a filter screen, and two rotating rods. Wastewater enters the filter box from the pressure vessel through the second water pipe. After being filtered by the filter screen, the clean liquid flows through the first water pipe to the inlet pipe, effectively intercepting impurities and preventing dirt from accumulating in the heat exchange tubes. This avoids a decrease in the heat exchange tubes' thermal conductivity, directly solving the problem of low heat exchange efficiency caused by impurity accumulation. At the same time, the filtered wastewater discharge is more environmentally friendly, improving the waste heat recovery rate.

[0032] 3. The installation components work together through a screw, moving rod, sliding sleeve, positioning rod, connecting rod, spring, and operating rod. The operating rod moves the connecting rod, causing the positioning rod to insert into or disengage from the positioning hole of the rotating rod. The spring provides a restoring force to ensure a firm positioning, enabling quick installation and removal of the filter screen. This facilitates regular cleaning or replacement of the filter screen, preventing filter screen clogging from affecting the filtration effect. This reduces maintenance difficulty, maintains the efficient operation of the filter components, and indirectly improves the heat exchange efficiency of the heat exchange tubes and the energy efficiency of the device.

[0033] This invention effectively improves waste heat utilization and water heating efficiency through a simple structure, resulting in significant energy savings. The rotating heat exchange tube breaks up water temperature stratification, increases contact frequency, and prevents impurity deposition, thereby improving heat exchange efficiency. The filter component intercepts large-diameter solid particles, making it environmentally friendly. The installation components are precisely positioned, and the filter screen is easy to replace, making it highly practical. Attached Figure Description

[0034] Figure 1 This is a three-dimensional front view of the structure according to an embodiment of this application;

[0035] Figure 2 Appendix to the embodiments of this application Figure 1 A schematic diagram of the structure of part A;

[0036] Figure 3 This is a three-dimensional view of the internal structure of the heat recovery tank according to an embodiment of this application;

[0037] Figure 4 This is a three-dimensional structural view of the heat exchange tube, rotary joint, liquid inlet pipe, liquid outlet pipe, first valve, and fixing rod according to an embodiment of this application.

[0038] Figure 5 This is a three-dimensional structural diagram of the heat recovery tank, sealing flange, water outlet pipe, second valve, and water inlet according to an embodiment of this application.

[0039] Figure 6 This is a three-dimensional structural diagram of the first water pipe, filter box, second water pipe, pressure plate, and rotating rod according to an embodiment of this application.

[0040] Figure 7 This is a three-dimensional exploded view of the structure of the first water pipe, filter box, second water pipe, mounting hole, sealing ring, pressure plate, filter screen, rotating rod and positioning hole in an embodiment of this application;

[0041] Figure 8 This is a three-dimensional structural view of the first water pipe, filter box, second water pipe, and rotating rod according to an embodiment of this application.

[0042] Figure 9 Appendix to the embodiments of this application Figure 8 A structural diagram of section B;

[0043] Figure 10 This is a three-dimensional rear view of the structure according to an embodiment of this application.

[0044] In the diagram: 1. Heat recovery tank; 2. Heat exchange tube; 3. Sealing flange; 4. Rotary joint; 5. Inlet pipe; 6. Drain pipe; 7. First valve; 8. Fixing rod; 9. Outlet pipe; 10. Second valve; 11. Water inlet; 12. Pressure relief valve; 13. Motor; 14. First gear; 15. Second gear; 16. First water pipe; 17. Filter box; 18. Second water pipe; 19. Mounting hole; 20. Sealing ring; 21. Pressure plate; 22. Filter screen; 23. Rotating rod; 24. Positioning hole; 25. Screw; 26. Moving rod; 27. Sliding sleeve; 28. Positioning rod; 29. ​​Connecting rod; 30. Spring; 31. Stabilizing ring; 32. Stabilizing rod; 33. Operating rod. Detailed Implementation

[0045] The present invention will be further explained below with reference to specific embodiments.

[0046] refer to Figures 1-10 This embodiment proposes a waste heat recovery device and an energy-saving pressure vessel, including a heat recovery tank 1. A water inlet 11 is opened at the top of the tank, and a water outlet pipe 9 is fixedly connected to the right side. A second valve 10 is installed on the water outlet pipe 9. Sealing flanges 3 are welded to the inner walls of the top and bottom of the heat recovery tank 1, respectively. A heat exchange pipe 2 passes through the two sealing flanges 3 and forms a rotatable connection. Rotary joints 4 are welded to the top and bottom of the heat exchange pipe 2, respectively. The two rotary joints 4 are welded and fixed to the inlet pipe 5 and the outlet pipe 6, respectively. A first valve 7 is installed on both the inlet pipe 5 and the outlet pipe 6. Two fixing rods 8 are bolted to the top and bottom of the heat recovery tank 1, respectively, and the two fixing rods 8 are welded and fixed to the inlet pipe 5 and the outlet pipe 6, respectively.

[0047] The drive assembly consists of a motor 13, a first gear 14, and a second gear 15. The motor 13 is bolted to the top of the heat recovery tank 1, and its output shaft is keyed to the first gear 14. The second gear 15 is fitted into the middle of the heat exchange tube 2 and welded in place. The first gear 14 and the second gear 15 mesh and drive each other. A pressure relief valve 12 is installed on the top of the heat recovery tank 1. The pressure relief valve 12 is connected to the inside of the tank and automatically opens to relieve pressure when the internal pressure exceeds 0.3 MPa.

[0048] The filter assembly includes a first water pipe 16, a filter box 17, a second water pipe 18, a pressure plate 21, a filter screen 22, and two rotating rods 23. A mounting hole 19 is formed on the inner front wall of the filter box 17, and a sealing ring 20 is bonded to the edge of the mounting hole 19. The rear end of the filter screen 22 passes through the mounting hole 19 to form a sliding connection, and its front end is pressed by the pressure plate 21, which fits against the front side of the filter box 17. The front ends of the two rotating rods 23 are rotatably connected to the left and right ends of the pressure plate 21, and their rear ends extend to the rear side of the filter box 17. The first water pipe 16 has an inlet pipe 5 welded to both ends and the bottom of the filter box 17, respectively. The second water pipe 18 has its top end welded to both ends and the pressure vessel drain port, respectively.

[0049] The mounting assembly consists of a screw 25, a moving rod 26, two sliding sleeves 27, two positioning rods 28, a connecting rod 29, two springs 30, and an operating rod 33. The rear end of the screw 25 is rotatably connected to the rear side of the filter box 17. The moving rod 26 has a threaded hole in its middle that engages with the screw 25, and sliding sleeves 27 are welded to both ends. The two positioning rods 28 are slidably fitted inside the sliding sleeves 27, and their rear ends can be inserted into the positioning holes 24 on the rotating rod 23. The connecting rod 29 is welded to the front end of the two positioning rods 28, and the springs 30 are fitted onto the positioning rods 28. The front and rear ends of the connecting rods 29 and sliding sleeves 27 are welded to each other, respectively. The operating rod 33 is welded to the top of the connecting rod 29. Two stabilizing rods 32 are welded to the rear side of the filter box 17, and two stabilizing rings 31 are welded to the bottom of the connecting rod 29. The stabilizing rings 31 are slidably fitted onto the stabilizing rods 32.

[0050] When implementing the energy-saving pressure vessel, the end of the second water pipe 18 furthest from the filter box 17 is welded to the pressure vessel's drain port. During operation of the waste heat recovery device, wastewater enters the filter box 17 from the pressure vessel's drain port through the second water pipe 18, is filtered by the filter screen 22, and then enters the heat exchange tube 2 through the first water pipe 16. The motor 13 drives the first gear 14 to rotate the second gear 15, causing the heat exchange tube 2 to rotate within the heat recovery tank 1, agitating the water flow and breaking up temperature stratification. As the wastewater flows within the heat exchange tube 2, heat is transferred to the water in the tank through the tube wall, and the cooled wastewater is discharged from the drain pipe 6. When the filter screen 22 needs to be replaced, rotating the operating lever 33 moves the connecting rod 29 forward, disengaging the positioning rod 28 from the positioning hole 24, allowing the filter screen 22 to be removed for cleaning or replacement.

[0051] This device achieves three effects through the rotation of heat exchange tube 2: first, it homogenizes the water temperature inside the tank, eliminating vertical temperature differences; second, it increases the contact frequency between the water flow and heat exchange tube 2, improving the heat transfer coefficient; and third, it prevents impurities from depositing on the surface of heat exchange tube 2. The filter assembly can intercept solid particles larger than 0.5mm, and the positioning accuracy of the installation assembly reaches ±0.1mm, ensuring reliable sealing after the filter screen 22 is installed. Actual tests show that this device can improve waste heat recovery efficiency by more than 40%, reduce wastewater discharge temperature by 25℃, extend the filter screen 22 replacement cycle to 3 months, and the equipment can operate continuously for more than 8000 hours without failure.

[0052] It should be noted that the specific models of the first valve 7, the second valve 10, the pressure relief valve 12, and the motor 13 used shall be selected by those skilled in the art. Furthermore, the first valve 7, the second valve 10, the pressure relief valve 12, and the motor 13 mentioned above are all existing technologies and will not be elaborated upon in this solution.

[0053] Working Principle: When using this waste heat recovery device and energy-saving pressure vessel, first connect the first valve 7, the second valve 10, the pressure relief valve 12, and the motor 13 to an external power source. Then, weld the end of the second water pipe 18 away from the filter box 17 to the drain port of the pressure vessel. Wastewater enters the filter box 17 from the drain port of the pressure vessel through the second water pipe 18. The filter screen 22 installed inside the filter box 17 can intercept solid particles with a diameter greater than 0.5mm. The wastewater filtered by the filter screen 22 enters the heat exchange tube 2 through the first water pipe 16. At this time, the motor 13 is started. The output shaft of the motor 13 drives the first gear 14 to rotate. The first gear 14 meshes with the second gear 15, thereby driving the heat exchange tube 2 to rotate inside the heat recovery tank 1. The rotation of the heat exchange tube 2 can agitate the water flow in the tank, break up the water temperature stratification, make the water temperature in the tank uniform, eliminate the vertical temperature difference, increase the contact frequency between the water flow and the heat exchange tube 2, improve the heat transfer coefficient, and prevent impurities from entering the tank. Heat is deposited on the surface of heat exchange tube 2. When sewage flows in heat exchange tube 2, heat is transferred to the water in the tank through the tube wall. The cooled sewage is discharged through drain pipe 6. The water in heat recovery tank 1 absorbs heat and can be discharged from outlet pipe 9 for use. When the internal pressure of heat recovery tank 1 exceeds 0.3MPa, pressure relief valve 12 automatically opens to relieve pressure. When filter screen 22 needs to be replaced, rotating operating rod 33 drives connecting rod 29 forward. Connecting rod 29 drives positioning rod 28 to slide in sliding sleeve 27, so that positioning rod 28 disengages from positioning hole 24 on rotating rod 23. Filter screen 22 can then be taken out for cleaning or replacement. The positioning accuracy of the installation components reaches ±0.1mm, which can ensure reliable sealing after filter screen 22 is installed. Actual tests show that this device can improve waste heat recovery efficiency by more than 40%, reduce sewage discharge temperature by 25℃, extend the filter screen 22 replacement cycle to 3 months, and the equipment can run continuously for more than 8000 hours without failure.

[0054] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A waste heat recovery device, comprising a heat recovery tank (1), wherein a water inlet (11) is provided at the top of the heat recovery tank (1), and a water outlet pipe (9) is fixedly connected to the right side of the heat recovery tank (1), and a second valve (10) is fixedly installed on the water outlet pipe (9), characterized in that, The waste heat recovery device also includes: Heat exchange tube (2) is installed inside the heat recovery tank (1). The top and bottom ends of the heat exchange tube (2) penetrate the top inner wall and bottom inner wall of the heat recovery tank (1) respectively and extend to the outside of the heat recovery tank (1). The top and bottom ends of the heat exchange tube (2) are rotatably connected to the liquid inlet pipe (5) and the liquid outlet pipe (6) respectively. The first valve (7) is fixedly installed on both the liquid inlet pipe (5) and the liquid outlet pipe (6). The drive assembly is used to drive the heat exchange tube (2) to rotate, thereby agitating the water flow inside the heat recovery tank (1) and improving the heat exchange efficiency. The drive assembly includes: a motor (13), a first gear (14) and a second gear (15). The motor (13) is fixedly installed on the top of the heat recovery tank (1). The first gear (14) is fixedly installed on the output shaft of the sub-motor (13). The second gear (15) is fixedly sleeved on the heat exchange tube (2) and meshes with the first gear (14). The filter assembly is located on the left side of the heat recovery tank (1). The filter assembly is in conjunction with the liquid inlet pipe (5). The filter assembly is used to filter the sewage discharged from the pressure vessel. The mounting assembly is located on the rear side of the filter box (17) and is respectively engaged with two rotating rods (23). The mounting assembly is used to stably fix the filter screen (22).

2. The waste heat recovery device according to claim 1, characterized in that, The heat recovery tank (1) is fixedly installed with sealing flanges (3) on the top inner wall and the bottom inner wall, and both sealing flanges (3) are rotatably connected to the heat exchange tube (2).

3. The waste heat recovery device according to claim 1, characterized in that, Rotary joints (4) are fixedly installed at the top and bottom of the heat exchange tube (2), and the two rotary joints (4) are fixedly installed at one end of the liquid inlet pipe (5) and one end of the liquid outlet pipe (6), respectively.

4. The waste heat recovery device according to claim 1, characterized in that, A pressure relief valve (12) is fixedly installed on the top of the heat recovery tank (1), and the pressure relief valve (12) is connected to the interior of the heat recovery tank (1).

5. A waste heat recovery device according to claim 1, characterized in that, The heat recovery tank (1) is fixedly installed with fixing rods (8) at the top and bottom. The two fixing rods (8) are fixedly installed on the inlet pipe (5) and the outlet pipe (6) respectively.

6. The waste heat recovery device according to claim 1, characterized in that, The filter assembly includes a first water pipe (16), a filter box (17), a second water pipe (18), a pressure plate (21), a filter screen (22), and two rotating rods (23). One end of the first water pipe (16) is fixedly connected to one end of the inlet pipe (5), and the other end of the first water pipe (16) is fixedly connected to the bottom of the filter box (17). One end of the second water pipe (18) is fixedly connected to the top of the filter box (17). The rear end of the filter screen (22) can be detached and inserted into the interior of the filter box (17). The pressure plate (21) is installed at the front end of the filter screen (22) and cooperates with the front side of the filter box (17). The front ends of the two rotating rods (23) are respectively rotatably connected to the left and right ends of the pressure plate (21), and the rear ends of the two rotating rods (23) are located on the rear side of the filter box (17).

7. A waste heat recovery device according to claim 5, characterized in that, The filter box (17) has an installation hole (19) on its front inner wall. The rear end of the filter screen (22) passes through the installation hole (19) and is slidably connected to the installation hole (19). A sealing ring (20) is fixedly installed on the front side of the filter box (17). The sealing ring (20) is sleeved on the installation hole (19). The rear side of the pressure plate (21) is in contact with the sealing ring (20).

8. A waste heat recovery device according to claim 1, characterized in that, The mounting assembly includes a screw (25), a moving rod (26), two sliding sleeves (27), two positioning rods (28), a connecting rod (29), two springs (30), and an operating rod (33). One end of the screw (25) is rotatably connected to the rear side of the filter box (17). The moving rod (26) is threaded onto the screw (25). The two sliding sleeves (27) are respectively fixedly installed at both ends of the moving rod (26). The sliding sleeves (27) are slidably fitted onto the corresponding positioning rods (28). Positioning holes (24) are provided on each rod (23). The rear end of the positioning rod (28) can be disengaged and inserted into the corresponding positioning hole (24). The connecting rod (29) is fixedly installed on the front end of the two positioning rods (28). The spring (30) is sleeved on the corresponding positioning rod (28). The front end of the spring (30) is fixedly installed on the connecting rod (29). The rear end of the spring (30) is fixedly installed on the corresponding sliding sleeve (27). The operating rod (33) is fixedly installed on the top of the connecting rod (29).

9. A waste heat recovery device according to claim 8, characterized in that, Two stabilizing rods (32) are fixedly installed on the rear side of the filter box (17), and two stabilizing rings (31) are fixedly installed on the bottom of the connecting rod (29). The stabilizing rings (31) are slidably sleeved on the corresponding stabilizing rods (32).

10. An energy-saving pressure vessel, characterized in that, The waste heat recovery device includes any one of claims 1-9, wherein one end of the second water pipe (18) is fixedly connected to the drain port of the pressure vessel.

Images