Boiler waste heat recovery device

Abstract

The invention discloses a boiler waste heat recovery device, and belongs to the technical field of boiler waste heat recovery, the boiler waste heat recovery device comprises a recovery box, a water tank and a filtering mechanism, one end of the recovery box is communicated with an air inlet pipe, the other end of the recovery box is communicated with an exhaust pipe, the water tank is fixedly arranged at the top of the recovery box, and the bottom of the water tank is communicated with a heat conduction pipe; the heat conduction pipe is arranged in the recycling box; the filtering mechanism is arranged at the exhaust pipe and is used for filtering gas; a water pump is arranged at the top of the recycling box, one end of the water pump communicates with the water tank, the other end of the water pump communicates with the heat conduction pipes, a plurality of conical cavities are formed in the bottom in the recycling box, and the heat conduction pipes are distributed in the conical cavities and the recycling box. In cooperation with a conical cavity in the recycling box, the contact area and time of gas and the heat conduction pipe are increased, the waste heat recycling efficiency is remarkably improved, energy waste can be effectively reduced, the energy utilization rate is increased, meanwhile, harmful gas emission can be reduced, and the environment is protected.

Description

Technical Field

[0001] The present invention relates to the technical field of boiler waste heat recovery, and in particular to a boiler waste heat recovery device. Background Art

[0002] A boiler is an energy conversion device that uses the heat released by fuel combustion or waste heat from industrial production to transfer it to water in a container, bringing the water to a desired temperature or pressure. It is primarily used for domestic purposes, with some industrial applications. During the process of heating water, boilers emit large amounts of flue gas, which carries a high level of heat.

[0003] Chinese patent CN220771158U discloses a boiler waste heat recovery device, including a recovery box and a water tank. An air inlet pipe is provided on one side of the recovery box, an exhaust pipe is provided on the other side of the recovery box, a filtering mechanism is provided in the recovery box, the filtering mechanism includes a fixed frame, activated carbon is provided in the fixed frame, filter screens are symmetrically provided on the front and back of the activated carbon, fixing mechanisms are symmetrically provided on both sides of the filtering mechanism, a slide is slidably connected in the fixed box, an inner cavity is symmetrically opened on both side walls of the recovery box, a slide is slidably connected in the inner cavity, a connecting rod is connected between the slides, a plurality of heat exchange tubes are provided in the recovery box, the other end of the heat exchange tube extends into the water tank, a water inlet pipe is provided on the top of the water tank, and a drain pipe is provided on one side of the water tank.

[0004] However, the above patent still has the following problems: the dust is filtered through the filtering mechanism, but since the flue gas generated by the boiler contains a large amount of dust, the filter will gradually be blocked over a long period of time, thereby gradually reducing the filtering effect of the filter. When maintaining the filtering mechanism, it is necessary to shut down and disassemble it, which is slow and inconvenient to operate, greatly reducing the recovery efficiency. Summary of the Invention

[0005] The present invention provides a boiler waste heat recovery device, which can solve the problem in the prior art that when maintaining a filtering mechanism, the operation is slow and inconvenient, which greatly reduces the recovery efficiency.

[0006] A boiler waste heat recovery device includes a recovery box, a water tank and a filtering mechanism, wherein one end of the recovery box is connected to an air inlet pipe, and the other end is connected to an exhaust pipe, the water tank is fixedly arranged on the top of the recovery box, and the bottom of the water tank is connected to a heat conduction pipe, and the heat conduction pipe is arranged inside the recovery box; the filtering mechanism is arranged at the exhaust pipe for filtering the gas; a water pump is provided on the top of the recovery box, one end of the water pump is connected to the water tank, and the other end is connected to the heat conduction pipe, a plurality of conical cavities are provided at the bottom of the recovery box, and the heat conduction pipes are distributed in the conical cavities and the inside of the recovery box.

[0007] According to one embodiment of the present invention, a water inlet is provided on the top of the water tank, and a water inlet valve is provided on the water inlet; a water outlet is provided on the side wall of the water tank, and a water outlet valve is provided on the water outlet.

[0008] According to one embodiment of the present invention, the filtering mechanism includes a mounting ring, a filter screen and a locking assembly. A semicircular groove is provided on the exhaust pipe, the filter screen is provided on the inner ring of the mounting ring, the mounting ring is provided at the semicircular groove, and positioning seats are provided on both sides of the semicircular groove. The locking assembly is provided on both sides of the mounting ring and locked on the positioning seats.

[0009] According to one embodiment of the present invention, the locking assembly includes a locking seat, a positioning block and a locking block. The locking seat is provided on both sides of the mounting ring, the positioning block is fixedly provided below the locking seat, the side wall of the positioning block is provided with a telescopic groove, the locking block is telescopically provided in the telescopic groove, a spring is provided in the telescopic groove, one end of the spring is connected to the side wall of the telescopic groove, and the other end is connected to the locking block, a positioning hole is provided on the positioning seat, a locking hole is provided on the side wall of the positioning hole, the positioning block is provided in the positioning hole, and the locking block is adapted to the locking hole.

[0010] According to one embodiment of the present invention, an abutment plate is provided inside the locking hole, one end of the abutment plate abuts against the locking block, and the other end passes through the positioning seat and is connected to a pressing ring.

[0011] According to one embodiment of the present invention, the size of the filter screen is adapted to the inner diameter of the exhaust pipe.

[0012] According to one embodiment of the present invention, a sealing ring is provided on the semicircular groove.

[0013] According to one embodiment of the present invention, a side of the locking block close to the positioning hole is provided with an arc surface.

[0014] According to one embodiment of the present invention, the size of the positioning block is adapted to the positioning hole.

[0015] According to one embodiment of the present invention, a heat-insulating handle is provided on the outside of the mounting ring.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention drives water to circulate in the heat pipe through a water pump, and cooperates with the tapered cavity in the recovery box to increase the contact area and time between the gas and the heat pipe, which significantly improves the waste heat recovery efficiency, effectively reduces energy waste, and improves energy utilization.

[0018] 2. The present invention presses the pressing ring, which moves the abutment plate, causing the locking block to retract into the telescopic slot against the spring force. This releases the lock between the mounting ring and the positioning seat, allowing the mounting ring and the filter panel to be removed from the semicircular slot. After cleaning or replacement, the mounting ring is replaced in the semicircular slot, and the positioning block is inserted into the positioning hole. Under the action of the spring force, the locking block automatically snaps into the locking hole, achieving rapid installation and fixation of the filter panel, facilitating cleaning and replacement of the filter panel, ensuring clean exhaust air, and reducing environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of a boiler waste heat recovery device.

[0020] Figure 2 This is a cross-sectional view of a boiler waste heat recovery device.

[0021] Figure 3 This is a diagram showing the installation of the filter panel.

[0022] Figure 4 Lock the section view for the lock block.

[0023] The accompanying drawings are as follows: 1. Recovery box; 11. Air inlet pipe; 12. Exhaust pipe; 121. Semicircular groove; 122. Sealing ring; 13. Conical cavity; 2. Water tank; 21. Heat pipe; 22. Water inlet; 23. Water inlet valve; 24. Water outlet; 25. Water outlet valve; 3. Water pump; 4. Mounting ring; 41. Filter plate; 5. Positioning seat; 51. Positioning hole; 52. Locking hole; 6. Locking seat; 61. Positioning block; 62. Telescopic slot; 63. Locking block; 64. Spring; 7. Abutment plate; 71. Pressing ring; 8. Heat-insulating handle. DETAILED DESCRIPTION

[0024] The specific embodiments of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0025] like Figures 1 to 4 As shown, a boiler waste heat recovery device includes a recovery box 1, a water tank 2 and a filtering mechanism, wherein one end of the recovery box 1 is connected to an air inlet pipe 11, and the other end is connected to an exhaust pipe 12, the water tank 2 is fixedly arranged on the top of the recovery box 1, and the bottom of the water tank 2 is connected to a heat conducting pipe 21, and the heat conducting pipe 21 is arranged inside the recovery box 1; the filtering mechanism is arranged at the exhaust pipe 12 for filtering the gas; a water pump 3 is provided on the top of the recovery box 1, one end of the water pump 3 is connected to the water tank 2, and the other end is connected to the heat conducting pipe 21, a plurality of conical cavities 13 are provided at the bottom of the recovery box 1, and the heat conducting pipes 21 are distributed in the conical cavity 13 and the inside of the recovery box 1.

[0026] The water is driven to circulate in the heat pipe 21 by the water pump 3, and the contact area and time between the gas and the heat pipe 21 are increased in conjunction with the tapered cavity 13 in the recovery box 1, which significantly improves the waste heat recovery efficiency, effectively reduces energy waste, and improves energy utilization.

[0027] A water inlet 22 is provided on the top of the water tank 2 , and a water inlet valve 23 is provided on the water inlet 22 . A water outlet 24 is provided on the side wall of the water tank 2 , and a water outlet valve 25 is provided on the water outlet 24 .

[0028] The water inlet 22 at the top of the water tank 2 is used to replenish the water in the water tank 2. The water inlet valve 23 controls the inflow of water. When the water inlet valve 23 is opened, water can enter the water tank 2 through the water inlet 22. The water outlet 24 on the side wall of the water tank 2 is used to discharge the heated hot water. The water outlet valve 25 controls the outflow of hot water. When the water outlet valve 25 is opened, the heated hot water in the water tank 2 can flow out of the water outlet 24. By setting the water inlet valve 23 and the water outlet valve 25, the replenishment and withdrawal of water in the water tank 2 can be flexibly controlled according to actual usage, making it convenient for users to adjust the water level in the water tank 2 and the amount of hot water used according to their needs. This improves the flexibility and convenience of using the waste heat recovery device and meets the demand for hot water in different scenarios.

[0029] The filtering mechanism includes a mounting ring 4, a filter screen plate 41 and a locking assembly. A semicircular groove 121 is provided on the exhaust pipe 12. The filter screen plate 41 is provided on the inner ring of the mounting ring 4. The mounting ring 4 is arranged at the semicircular groove 121. Positioning seats 5 are provided on both sides of the semicircular groove 121. The locking assembly is arranged on both sides of the mounting ring 4 and locked on the positioning seats 5.

[0030] The inner ring of the mounting ring 4 fixes the filter screen 41, which is installed at the semicircular groove 121 of the exhaust pipe 12. The positioning seats 5 on both sides of the semicircular groove 121 cooperate with the locking components on both sides of the mounting ring 4 to fix it. When the high-temperature gas is discharged from the exhaust pipe 12, the filter screen 41 intercepts impurities and particulate matter in the gas, thereby filtering the exhaust gas. This reduces pollutant emissions and protects the environment. The filter screen 41 can adopt an activated carbon filter layer. At the same time, the detachable structural design facilitates regular cleaning or replacement of the filter screen 41 to ensure the filtering effect. At the same time, it avoids the impact of filter blockage on gas emissions and waste heat recovery efficiency, ensuring long-term stable operation of the equipment.

[0031] The locking assembly includes a locking seat 6, a positioning block 61, and a locking block 63. The locking seat 6 is provided on both sides of the mounting ring 4. The positioning block 61 is fixedly provided below the locking seat 6. The side wall of the positioning block 61 is provided with a telescopic slot 62. The locking block 63 is telescopically provided in the telescopic slot 62. A spring 64 is provided in the telescopic slot 62. One end of the spring 64 is connected to the side wall of the telescopic slot 62, and the other end is connected to the locking block 63. A positioning hole 51 is provided on the positioning seat 5. The side wall of the positioning hole 51 is provided with a locking hole 52. The positioning block 61 is provided in the positioning hole 51, and the locking block 63 is adapted to the locking hole 52. An abutment plate 7 is provided inside the locking hole 52. One end of the abutment plate 7 abuts against the locking block 63, and the other end passes through the positioning seat 5 and is connected to a pressing ring 71.

[0032] Positioning blocks 61 are fixed below the locking seats 6 on both sides of the mounting ring 4. Locking blocks 63 within the positioning blocks 61 are retractable under the action of springs 64. During installation, the positioning blocks 61 are inserted into the positioning holes 51 of the positioning seat 5, and the locking blocks 63, under the elastic force of springs 64, snap into the locking holes 52, securing the mounting ring 4 to the positioning seat 5. During removal, pressing the pressing ring 71 drives the abutment plate 7 to push the locking blocks 63 back into the telescopic slots 62, overcoming the elastic force of springs 64 and releasing the lock.

[0033] The design of the pressing ring 71 and the abutment plate 7 transforms the extension and retraction of the locking block 63 into a pressing action, making the removal of the filter panel 41 more convenient and labor-saving, and improving the convenience of maintenance operations. At the same time, this structural design ensures the stability and reliability of the extension and retraction of the locking block 63, preventing damage to the locking block 63 or failure to lock properly due to improper operation.

[0034] The size of the filter screen 41 is adapted to the inner diameter of the exhaust pipe 12, ensuring that the filter screen 41 can be tightly installed in the exhaust pipe 12 and completely cover the exhaust passage. The close fit between the filter screen 41 and the exhaust pipe 12 prevents the gas from being discharged directly without being filtered, thereby improving the filtering effect.

[0035] A sealing ring 122 is provided on the semicircular groove 121. When the mounting ring 4 is installed, the sealing ring 122 on the semicircular groove 121 is squeezed between the mounting ring 4 and the semicircular groove 121, forming a sealing structure to prevent gas leakage from the connection between the mounting ring 4 and the exhaust pipe 12. The provision of the sealing ring 122 effectively improves the sealing performance of the connection between the filter mechanism and the exhaust pipe 12, preventing high-temperature gas leakage, ensuring that all gas is filtered through the filter mechanism during the waste heat recovery process, and avoiding heat loss and safety hazards caused by gas leakage, thereby improving the safety and stability of equipment operation.

[0036] The locking block 63 is provided with an arcuate surface on one side thereof near the positioning hole 51. The arcuate surface on the side of the locking block 63 near the positioning hole 51 contacts the edge of the positioning hole 51 when the positioning block 61 is installed and inserted into the positioning hole 51. As the positioning block 61 is inserted deeper, the arcuate surface is squeezed, pushing the locking block 63 into the telescopic slot 62. When the positioning block 61 is fully inserted into the positioning hole 51, the locking block 63 snaps into the locking hole 52 under the elastic force of the spring 64. The arcuate surface design makes the insertion of the positioning block 61 into the positioning hole 51 smoother, reduces frictional resistance during the insertion process, and reduces the difficulty of installation. At the same time, it avoids damage to the locking block 63 or the positioning hole 51 due to excessive resistance during insertion, thereby increasing the service life and reliability of the locking assembly and making the installation of the filter panel 41 more convenient and efficient.

[0037] The size of the positioning block 61 is adapted to the positioning hole 51 , ensuring that the positioning block 61 can be accurately inserted into the positioning hole 51 , so that the locking block 63 can be smoothly engaged in the locking hole 52 .

[0038] The mounting ring 4 is provided with an insulating handle 8 on its outer side. Made of a heat-insulating material, the insulating handle 8 on the outer side of the mounting ring effectively blocks heat transferred between the mounting ring 4 and the exhaust pipe 12 when the operator removes and installs the mounting ring 4, thus preventing hand burns. The provision of the insulating handle 8 improves operational safety, protects the operator's hands, and eliminates the need for operators to worry about high-temperature burns when maintaining the filter mechanism. It also facilitates the operator's removal and installation of the mounting ring 4, improving equipment maintenance efficiency.

[0039] The boiler waste heat recovery device is centered on a recovery tank 1. One end of the recovery tank 1 is connected to an air inlet pipe 11 to introduce high-temperature gas discharged from the boiler, and the other end is connected to an exhaust pipe 12 to discharge the cooled gas. A water tank 2 is fixed on the top of the recovery tank 1. The bottom of the water tank 2 is connected to the inside of the recovery tank 1 through a heat pipe 21. A water pump 3 is installed on the top of the water tank 2, one end of which is connected to the water tank 2 and the other end of which is connected to the heat pipe 21. It can drive the water in the water tank 2 to circulate in the heat pipe 21. Several conical cavities 13 are provided at the bottom of the recovery tank 1, and the heat pipes 21 are distributed in the conical cavities 13 and the internal space of the recovery tank 1. A filtering mechanism is provided at the exhaust pipe 12, which is composed of a mounting ring 4, a filter screen 41 and a locking assembly. The inner ring of the mounting ring 4 fixes the filter screen 41 and is installed at the semicircular groove 121 of the exhaust pipe 12. It is fixedly connected to the positioning seat 5 on both sides of the semicircular groove 121 through a locking assembly. The locking assembly comprises a locking base 6, a positioning block 61, and a locking block 63. The positioning block 61 is fixed to the locking base 6 at its lower end. The locking block 63 is retracted and expanded within the telescopic slot 62 of the positioning block 61 by a spring 64, and is secured in place with the positioning hole 51 and locking hole 52 on the positioning base 5. Furthermore, the water tank 2 is provided with a water inlet 22 and a water outlet 24, each equipped with an inlet valve 23 and an outlet valve 25. A sealing ring 122 is provided in the semicircular groove 121. The side of the locking block 63 closest to the positioning hole 51 is curved, and an insulating handle 8 is provided on the outside of the mounting ring 4.

[0040] The working principle of the present invention is as follows: the high-temperature gas discharged from the boiler enters the recovery tank 1 from the air inlet pipe 11. During the flow in the recovery tank 1, the heat is transferred to the water in the heat-conducting pipe 21. The water pump 3 is started to pump the water in the water tank 2 into the heat-conducting pipe 21. The water absorbs the heat of the high-temperature gas in the heat-conducting pipe 21, and its temperature rises, and then flows back to the water tank 2. The low-temperature gas after the heat exchange continues to flow to the exhaust pipe 12. When passing through the filter screen 41 of the filtering mechanism, the impurities and particulate matter therein are intercepted and filtered, and finally discharged through the exhaust pipe 12. When it is necessary to clean or replace the filter screen 41, press the pressing ring 71 to drive the abutment plate 7 to move, so that the locking block 63 overcomes the elastic force of the spring 64 and retracts into the telescopic groove 62, releases the lock between the mounting ring 4 and the positioning seat 5, and the mounting ring 4 together with the filter screen 41 can be removed from the semicircular groove 121. After cleaning or replacement, the mounting ring 4 is put back into the semicircular groove 121 , and the positioning block 61 is inserted into the positioning hole 51 . Under the elastic force of the spring 64 , the locking block 63 is automatically snapped into the locking hole 52 , thereby achieving rapid installation and fixation of the filter screen plate 41 .

[0041] The above disclosures are only a few specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A boiler waste heat recovery device, comprising a recovery box (1), a water tank (2) and a filtering mechanism, wherein one end of the recovery box (1) is connected to an air inlet pipe (11), and the other end is connected to an exhaust pipe (12), the water tank (2) is fixedly arranged on the top of the recovery box (1), and the bottom of the water tank (2) is connected to a heat conducting pipe (21), and the heat conducting pipe (21) is arranged inside the recovery box (1); the filtering mechanism is arranged at the exhaust pipe (12) for filtering gas; It is characterized by: A water pump (3) is provided on the top of the recovery box (1), one end of the water pump (3) is connected to the water box (2), and the other end is connected to the heat conduction pipe (21). A plurality of conical cavities (13) are provided at the bottom of the recovery box (1), and the heat conduction pipes (21) are distributed inside the conical cavities (13) and the recovery box (1).

2. A boiler waste heat recovery device according to claim 1, characterized in that: The water tank (2) is provided with a water inlet (22) on the top, and a water inlet valve (23) is provided on the water inlet (22); a water outlet (24) is provided on the side wall of the water tank (2), and a water outlet valve (25) is provided on the water outlet (24).

3. The boiler waste heat recovery device according to claim 1, characterized in that: The filtering mechanism comprises a mounting ring (4), a filter screen plate (41) and a locking assembly; a semicircular groove (121) is provided on the exhaust pipe (12); the filter screen plate (41) is provided on the inner ring of the mounting ring (4); the mounting ring (4) is arranged at the semicircular groove (121); positioning seats (5) are provided on both sides of the semicircular groove (121); and the locking assembly is arranged on both sides of the mounting ring (4) and locked on the positioning seats (5).

4. A boiler waste heat recovery device according to claim 3, characterized in that: The locking assembly includes a locking seat (6), a positioning block (61) and a locking block (63). The locking seat (6) is provided on both sides of the mounting ring (4). The positioning block (61) is fixedly provided below the locking seat (6). A telescopic groove (62) is provided on the side wall of the positioning block (61). The locking block (63) is telescopically provided in the telescopic groove (62). A spring (64) is provided in the telescopic groove (62). One end of the spring (64) is connected to the side wall of the telescopic groove (62), and the other end is connected to the locking block (63). A positioning hole (51) is provided on the positioning seat (5). A locking hole (52) is provided on the side wall of the positioning hole (51). The positioning block (61) is provided in the positioning hole (51), and the locking block (63) is adapted to the locking hole (52).

5. The boiler waste heat recovery device according to claim 4, characterized in that: An abutment plate (7) is provided inside the locking hole (52), one end of the abutment plate (7) abuts against the locking block (63), and the other end passes through the positioning seat (5) and is connected to a pressing ring (71).

6. The boiler waste heat recovery device according to claim 3, characterized in that: The size of the filter screen plate (41) is compatible with the inner diameter of the exhaust pipe (12).

7. The boiler waste heat recovery device according to claim 3, characterized in that: A sealing ring (122) is provided on the semicircular groove (121).

8. The boiler waste heat recovery device according to claim 4, characterized in that: A side of the locking block (63) close to the positioning hole (51) is provided with an arc-shaped surface.

9. The boiler waste heat recovery device according to claim 4, characterized in that: The size of the positioning block (61) is adapted to the size of the positioning hole (51).

10. The boiler waste heat recovery device according to claim 3, characterized in that: A heat-insulating handle (8) is provided on the outside of the mounting ring (4).

Images