A waste heat recovery apparatus and flue gas treatment system

Abstract

The utility model relates to a waste heat recovery technical field, concretely is a kind of waste heat recovery equipment and flue gas treatment system, including filter box, filter box right side is equipped with first waste heat recovery tank, first waste heat recovery tank right side is connected with second waste heat recovery tank by exhaust pipe;The waste heat recovery equipment and flue gas treatment system, set up filter box and under the cooperation of the partition with filter screen, realize the flue gas that is discharged in boiler preliminary filtration particulate matter, then high-temperature flue gas enters into first waste heat recovery tank, after multiple backshaped through groove, increase the contact area with first water storage layer, realize heat exchange cooperation, heat internal water body and recover the waste heat in flue gas, under the cooperation of multiple heat exchange pipes, realize secondary heat exchange, recover the residual heat in flue gas, under the cooperation of first butterfly valve and second butterfly valve, control the water body discharge use of heat exchange, reduce energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery technology, specifically a waste heat recovery device and a flue gas treatment system. Background Technology

[0002] Gas-fired boilers obtain heat by burning gas to heat water and then directly discharge the flue gas into the atmosphere. Since the flue gas discharge temperature is usually around 200℃, a large amount of heat is wasted. Boiler flue gas is usually discharged directly into the atmosphere, resulting in the waste of heat in the flue gas. Generally, waste heat recovery from the flue gas is achieved by directly passing the flue gas into a water body, where the water absorbs the waste heat. However, harmful substances in the flue gas enter the water body, polluting the water body and preventing its recycling. This hinders the full recovery of waste heat and reduces energy consumption. At the same time, treating water-soluble nitrogen and sulfur in the flue gas reduces the pollution impact on the surrounding environment caused by direct emissions. Summary of the Invention

[0003] The purpose of this invention is to provide a waste heat recovery device and a flue gas treatment system to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A waste heat recovery device includes a filter box, a first waste heat recovery box is provided on the right side of the filter box, and a second waste heat recovery box is connected to the right side of the first waste heat recovery box through an exhaust pipe. An air inlet pipe is provided on the left side of the filter box near the middle. A guide pipe is provided on the top of the filter box. The end of the guide pipe is connected to the left side of the first waste heat recovery box. A slot is provided on the front face of the filter box near the bottom. A collection box is provided in the slot. An installation groove is provided on the front face of the filter box near the top. A separator plate for intercepting particulate matter in flue gas is inserted into the installation groove. The first waste heat recovery box has several U-shaped through slots inside. The first waste heat recovery box has insert rings on both the top and bottom. The outer end of each insert ring is provided with a sealing cap. A first water storage layer is formed between the outer casing of the U-shaped through slots and the inner wall of the first waste heat recovery box. The second waste heat recovery box has gas storage chambers at both ends. Several heat exchange tubes are provided between the two gas storage chambers of the second waste heat recovery box. A second water storage layer is provided between the outer wall of the heat exchange tubes and the inner wall of the second waste heat recovery box.

[0005] Furthermore, the air intake pipe and the filter box are integrally formed, and the air intake pipe and the interior of the filter box are interconnected. The width of the inner wall of the slot is adapted to the width of the outer wall of the collection box. The bottom of the guide pipe is connected to the interior of the filter box, and the top of the guide pipe is connected to the interior of the U-shaped through groove.

[0006] In this invention, the inlet pipe guides the high-temperature flue gas generated in the external boiler into the filter box for corresponding waste heat recovery treatment. With the cooperation of the guide pipe, the flue gas after filtering particulate matter inside the filter box is guided into the first waste heat recovery box.

[0007] Specifically, an installation groove is provided on the front end face of the filter box near the top, a slot is provided in the installation groove, a sealing plate is provided in the installation groove, the sealing plate and the partition plate are integrally formed, and a filter screen is provided on the partition plate.

[0008] In this utility model, the sealing plate and the mounting groove are inserted into each other and fixed to the filter box by symmetrical fastening bolts. The partition plate and the slot are inserted into each other and fixed to each other. The filter screen is fixed to the partition plate by screws. The mesh size of the filter screen is 1mm, which helps to filter particulate matter in flue gas. The filter screen is made of steel wire and is resistant to high temperature filtration.

[0009] It should be noted that the insertion ring and the first waste heat recovery box are integrally formed. The width of the inner wall of the sealing cover is adapted to the width of the outer wall of the insertion ring. A sealing gasket is also provided inside the sealing cover. The sealing gasket is bonded and fixed to the sealing cover. The width of the outer wall of the sealing gasket is adapted to the width of the inner wall of the insertion ring. The sealing cover is fixedly connected to the insertion ring by screws.

[0010] In this invention, the sealing gasket and the insert ring are tightly connected, increasing the tightness of the two sealing covers combined with the upper and lower ends of the first waste heat recovery box. With the help of screws, the sealing covers are fixed with the insert ring, making it easy to disassemble and remove the sealing covers to clean the inside of the through groove.

[0011] Furthermore, the loop-shaped channels are evenly spaced, and the left end of the exhaust pipe is connected to the right side of the loop-shaped channels, while the right end of the exhaust pipe is connected to the gas storage chamber on the left side inside the second waste heat recovery box.

[0012] In this invention, the combination of multiple loop-shaped channels increases the time that flue gas spends passing through the first waste heat recovery box, and the loop-shaped channels increase the contact area between the flue gas and the first water storage layer, thereby facilitating the initial recovery of waste heat.

[0013] Furthermore, the front end of the first waste heat recovery box is provided with a first water inlet pipe communicating with the first water storage layer near the top, and the front end of the first waste heat recovery box is provided with a first water outlet pipe communicating with the first water storage layer near the bottom, and a first butterfly valve is provided at the end of the first water outlet pipe.

[0014] In this invention, the first water inlet pipe facilitates the addition of water to the first water storage layer. With the cooperation of multiple loop channels, high-temperature flue gas passes through the loop channels to achieve heat exchange and recover waste heat. With the cooperation of the first butterfly valve, the first butterfly valve is opened to discharge hot water for hot water utilization. The hot water circulates to the outside of the boiler, reducing heat loss from the outside of the boiler and lowering energy consumption.

[0015] It is worth noting that a guide pipe is provided at the right end of the second waste heat recovery box, the heat exchange tubes are distributed in a ring at equal intervals, a second water inlet pipe communicating with the second water storage layer is provided at the top of the outer wall of the second waste heat recovery box, a second water outlet pipe communicating with the second water storage layer is provided near the bottom of the right end face of the second waste heat recovery box, and a second butterfly valve is provided at the end of the second water outlet pipe.

[0016] In this invention, the second inlet pipe replenishes water to the second water storage layer, and the guide pipe guides the flue gas after waste heat recovery in the second waste heat recovery box to be discharged. With the cooperation of multiple heat exchange tubes, the flue gas that has initially recovered heat in the first waste heat recovery box is subjected to secondary heat recovery. The multiple heat exchange tubes increase the contact area of ​​the flue gas, thereby heating the water in the second water storage layer, achieving heat exchange coordination, reducing heat waste, and the second butterfly valve is opened to facilitate the discharge and collection of internal hot water for use.

[0017] In addition, this utility model also discloses a flue gas treatment system, including a flue gas treatment component and a waste heat recovery device, wherein the flue gas treatment component is composed of a water bath and a drying box; A vent pipe is provided on the upper surface of the water bath near the left side. A one-way valve is provided on the vent pipe. The vent pipe extends into the water bath near the bottom. A water inlet pipe is provided on the top of the water bath. A drain pipe is provided on the front face of the water bath near the bottom. The drying chamber is equipped with discharge pipes at both ends, one of which is connected to the internal space at the top of the water bath. The drying chamber is equipped with drying cotton, and the top of the drying chamber is equipped with a top cover. The waste heat recovery equipment adopts the waste heat recovery equipment described in any of the above schemes.

[0018] In this process, water is added to the water bath through a water inlet pipe, submerging the end of the vent pipe. The flue gas discharged from the second waste heat recovery box enters the water body, where nitrogen and sulfur in the flue gas come into contact with the water and are adsorbed and dissolved, reducing the impact of direct emissions on air pollution. In conjunction with the drying box, the flue gas adsorbed by the water enters the drying box through the discharge pipe, and is filtered through drying cotton to remove moisture from the flue gas, reducing the increase of ambient humidity in the emitted air.

[0019] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model achieves preliminary filtration of particulate matter in the flue gas discharged from the boiler by setting up a filter box and cooperating with a partition plate with a filter screen. Then, the high-temperature flue gas enters the first waste heat recovery box, passes through multiple looped channels to increase the contact area with the first water storage layer, and achieves heat exchange cooperation to heat the internal water body to recover the waste heat in the flue gas. Then, it enters the second waste heat recovery box, where multiple heat exchange tubes cooperate to achieve secondary heat exchange and recover the remaining heat in the flue gas. With the cooperation of the first butterfly valve and the second butterfly valve, the discharge and use of the heat exchange water body is controlled, thereby reducing energy consumption.

[0020] This invention, by setting up a flue gas treatment component, in conjunction with a water bath and a drying box, adsorbs and combines water-soluble nitrogen and sulfur in the flue gas. A one-way valve prevents water backflow in the water bath, and drying cotton is used in the drying box to reduce the amount of water vapor mixed in the flue gas and emitted, thereby increasing the humidity of the surrounding environment and affecting the surrounding environment. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the combined structure of the waste heat recovery equipment and flue gas treatment components of this utility model; Figure 2 This is a schematic diagram of the waste heat recovery structure of this utility model; Figure 3 This is a schematic diagram of the filter box structure of this utility model; Figure 4 This is a schematic diagram of the first waste heat recovery box of this utility model; Figure 5 This is a schematic cross-sectional view of the first waste heat recovery box of this utility model; Figure 6 This is a schematic diagram of the structure of the second waste heat recovery box of this utility model; Figure 7 This is a schematic cross-sectional view of the second waste heat recovery box of this utility model; Figure 8 This is a schematic diagram of the flue gas treatment component of this utility model; Figure 9 This is a schematic diagram of the structure of the water bath and drying oven of this utility model; Figure 10 This is a schematic diagram of the overall cross-sectional structure of this utility model.

[0022] The meanings of the labels in the diagram are as follows: 1. Filter box; 10. Slot; 100. Collection box; 11. Air inlet pipe; 12. Mounting slot; 120. Card slot; 13. Sealing plate; 130. Divider plate; 131. Filter screen; 14. Guide pipe; 2. First waste heat recovery box; 20. Insert ring; 21. U-shaped through groove; 22. First water inlet pipe; 23. First water outlet pipe; 230. First butterfly valve; 24. Sealing cover; 240. Sealing gasket; 25. First water storage layer; 26. Exhaust pipe; 3. Second waste heat recovery box; 30. Guide pipe; 31. Second water inlet pipe; 32. Second water outlet pipe; 320. Second butterfly valve; 33. Gas storage chamber; 34. Heat exchange pipe; 35. Second water storage layer; 4. Flue gas treatment components; 40. Water bath; 400. Vent pipe; 401. Check valve; 402. Water inlet pipe; 403. Drain pipe; 41. Drying box; 410. Discharge pipe; 411. Drying cotton; 412. Top cover. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1 Please see Figure 2-7 This embodiment provides a technical solution: A waste heat recovery device includes a filter box 1, a first waste heat recovery box 2 is provided on the right side of the filter box 1, and a second waste heat recovery box 3 is connected to the right side of the first waste heat recovery box 2 via an exhaust pipe 26. Furthermore, an air inlet pipe 11 is provided on the left side near the middle of the filter box 1, and a guide pipe 14 is provided on the top of the filter box 1. The end of the guide pipe 14 is connected to the left side of the first waste heat recovery box 2. A slot 10 is provided on the front end face of the filter box 1 near the bottom. A collection box 100 is provided in the slot 10. The air inlet pipe 11 and the filter box 1 are integrally formed and are interconnected with the interior of the filter box 1. The width of the inner wall of the slot 10 is adapted to the width of the outer wall of the collection box 100. The bottom of the guide pipe 14 is connected to the interior of the filter box 1, and the top of the guide pipe 14 is connected to the interior of the U-shaped through groove 21.

[0025] In this utility model, the air inlet pipe 11 guides the high-temperature flue gas generated in the external boiler into the filter box 1 for corresponding waste heat recovery treatment. With the cooperation of the guide pipe 14, the flue gas after filtering particulate matter inside the filter box 1 is guided into the first waste heat recovery box 2.

[0026] Specifically, a mounting groove 12 is provided on the front end face of the filter box 1 near the top, and a partition plate 130 for intercepting particulate matter in the flue gas is inserted into the mounting groove 12; a mounting groove 12 is provided on the front end face of the filter box 1 near the top, a slot 120 is provided in the mounting groove 12, a sealing plate 13 is provided in the mounting groove 12, the sealing plate 13 and the partition plate 130 are integrally formed, and a filter screen 131 is provided on the partition plate 130.

[0027] In this utility model, the sealing plate 13 and the mounting groove 12 are inserted into each other and fixed to the filter box 1 by symmetrical fastening bolts. The partition plate 130 and the slot 120 are inserted into each other and fixed to each other. The filter screen 131 is fixed to the partition plate 130 by screws. The mesh diameter of the filter screen 131 is 1mm, which helps to filter particulate matter in flue gas. The filter screen 131 is made of steel wire and is resistant to high temperature filtration.

[0028] It should be noted that the first waste heat recovery box 2 has several through grooves 21 inside, and the first waste heat recovery box 2 has insert rings 20 on both the top and bottom. The outer end of each insert ring 20 is provided with a sealing cap 24. A first water storage layer 25 is opened between the outside of the through grooves 21 and the inner wall of the first waste heat recovery box 2. Furthermore, the insertion ring 20 and the first waste heat recovery box 2 are integrally formed. The width of the inner wall of the sealing cover 24 is adapted to the width of the outer wall of the insertion ring 20. The sealing cover 24 is also provided with a sealing gasket 240 inside. The sealing gasket 240 is bonded and fixed to the sealing cover 24. The width of the outer wall of the sealing gasket 240 is adapted to the width of the inner wall of the insertion ring 20. The sealing cover 24 is fixedly connected to the insertion ring 20 by screws.

[0029] In this utility model, the sealing gasket 240 and the insert ring 20 are tightly inserted and matched, which increases the tightness of the two sealing covers 24 combined with the upper and lower ends of the first waste heat recovery box 2. With the help of screws, the sealing cover 24 is fixed with the insert ring 20, which makes it convenient to disassemble and remove the sealing cover 24 to clean the inside of the through groove 21.

[0030] Specifically, the loop-shaped channels 21 are evenly spaced, and the left end of the exhaust pipe 26 is connected to the right side of the loop-shaped channels 21. The right end of the exhaust pipe 26 is connected to the gas storage chamber 33 on the left side inside the second waste heat recovery box 3.

[0031] In this invention, the cooperation of multiple loop-shaped channels 21 increases the time for flue gas to pass through the first waste heat recovery box 2, and the loop-shaped channels 21 increase the contact area between the flue gas and the first water storage layer 25, thereby facilitating the initial recovery of waste heat.

[0032] Secondly, the front end of the first waste heat recovery box 2 is provided with a first inlet pipe 22 near the top, which is connected to the first water storage layer 25, and the front end of the first waste heat recovery box 2 is provided with a first outlet pipe 23 near the bottom, which is connected to the first water storage layer 25. The end of the first outlet pipe 23 is provided with a first butterfly valve 230.

[0033] In this invention, the first water inlet pipe 22 facilitates the addition of water to the first water storage layer 25. With the cooperation of multiple loop channels 21, high-temperature flue gas passes through the loop channels 21 to achieve heat exchange and recover waste heat. With the cooperation of the first butterfly valve 230, the first butterfly valve 230 is opened to discharge hot water for hot water utilization. The hot water is circulated to the outside of the boiler to reduce heat loss from the outside of the boiler and reduce energy consumption.

[0034] It is worth adding that gas storage chambers 33 are provided at both ends of the second waste heat recovery box 3. Several heat exchange pipes 34 are provided between the two gas storage chambers 33 of the second waste heat recovery box 3. A second water storage layer 35 is provided between the outer wall of the heat exchange pipes 34 and the inner wall of the second waste heat recovery box 3.

[0035] Furthermore, the right end of the second waste heat recovery box 3 is provided with a guide pipe 30, the heat exchange pipes 34 are distributed in a ring at equal intervals, the top of the outer wall of the second waste heat recovery box 3 is provided with a second water inlet pipe 31 that communicates with the second water storage layer 35, the right end face of the second waste heat recovery box 3 near the bottom is provided with a second water outlet pipe 32 that communicates with the second water storage layer 35, and the end of the second water outlet pipe 32 is provided with a second butterfly valve 320.

[0036] In this invention, the second inlet pipe 31 replenishes water into the second water storage layer 35, and the guide pipe 30 guides the flue gas after waste heat recovery in the second waste heat recovery box 3 to discharge. With the cooperation of multiple heat exchange pipes 34, the flue gas that has initially recovered heat in the first waste heat recovery box 2 undergoes a second heat recovery. The multiple heat exchange pipes 34 increase the contact area of ​​the flue gas, thereby heating the water in the second water storage layer 35, achieving heat exchange and reducing heat waste. The second butterfly valve 320 is opened to facilitate the discharge and collection of internal hot water for use.

[0037] In this embodiment of the waste heat recovery equipment, the first step is to insert the steel wire filter screen 131 into the slot 120 through the partition plate 130, insert the collection box 100 into the slot 10, connect the air inlet pipe 11 to the external boiler flue gas exhaust pipe, connect the guide pipe 14 to the first waste heat recovery box 2, and insert the two sealing covers 24 into the insert rings 20 at both ends of the first waste heat recovery box 2 through the sealing gasket 240 and fix them with fastening bolts. Then, the exhaust pipe 26 is connected to the first waste heat recovery box 2 and the second waste heat recovery box 3. The water that needs heat exchange is guided from the first inlet pipe 22 and the second inlet pipe 31 into the first water storage layer 25 and the second water storage layer 35, respectively. With the cooperation of the loop trough 21 and the heat exchange pipe 34, the contact area with the flue gas is increased, and heat exchange is carried out on the water. The excess heat in the flue gas is absorbed and the recovered heat is used to heat the water. The water is discharged through the first butterfly valve 230 and the second butterfly valve 320 for centralized collection and use. The heated water is guided to the outer insulation shell of the boiler to reduce heat loss and thus reduce energy consumption.

[0038] Example 2 Please see Figure 1 , Figures 8-10 Based on Embodiment 1, this embodiment provides the following technical solution: The flue gas treatment component 4 is composed of a water bath 40 and a drying box 41; A vent pipe 400 is provided on the upper surface of the water bath 40 near the left side. A one-way valve 401 is provided on the vent pipe 400. The vent pipe 400 extends into the water bath 40 and one end is near the bottom. A water inlet pipe 402 is provided on the top of the water bath 40. A drain pipe 403 is provided on the front end of the water bath 40 near the bottom. The drying chamber 41 is equipped with discharge pipes 410 at both ends, one of which is connected to the internal space at the top of the water bath 40. The drying chamber 41 is equipped with drying cotton 411 inside, and the top of the drying chamber 41 is equipped with a top cover 412.

[0039] Water is added to the water bath 40 through the water inlet pipe 402, submerging the end of the vent pipe 400. The flue gas discharged from the second waste heat recovery box 3 enters the water body. The nitrogen and sulfur in the flue gas come into contact with the water body and are adsorbed and dissolved in the water, reducing the impact of direct emissions on air pollution. With the cooperation of the drying box 41, the flue gas adsorbed by the water body enters the drying box 41 through the discharge pipe 410. After being filtered by the drying cotton 411, the water vapor in the flue gas is removed, reducing the increase of ambient humidity in the emitted air.

[0040] In addition, with the cooperation of the one-way valve 401, the water in the water bath 40 is prevented from flowing back from the vent pipe 400. The screws on the top cover 412 can be removed to facilitate the opening of the top cover 412 and the internal drying cotton 411 can be disassembled and replaced. The top of the vent pipe 400 is inserted into the end of the guide pipe 30 and fixed by a combination of flange and screws to achieve a tight insertion and fixation. The waste heat recovery equipment adopts the waste heat recovery equipment of Embodiment 1 in the above scheme.

Claims

1. A waste heat recovery device, comprising a filter box (1), characterized in that: The filter box (1) is provided with a first waste heat recovery box (2) on the right side, and the first waste heat recovery box (2) is connected to a second waste heat recovery box (3) on the right side through an exhaust pipe (26); An air inlet pipe (11) is provided on the left side near the middle of the filter box (1). A guide pipe (14) is provided on the top of the filter box (1). The end of the guide pipe (14) is connected to the left side of the first waste heat recovery box (2). A slot (10) is provided on the front end face of the filter box (1) near the bottom. A collection box (100) is provided in the slot (10). An installation groove (12) is provided on the front end face of the filter box (1) near the top. A separator plate (130) for intercepting particulate matter in flue gas is inserted into the installation groove (12). The first waste heat recovery box (2) has several through grooves (21) inside. The first waste heat recovery box (2) has insert rings (20) on both the top and bottom. The outer end of each insert ring (20) is provided with a sealing cap (24). A first water storage layer (25) is opened between the outer casing of the through groove (21) and the inner wall of the first waste heat recovery box (2). The second waste heat recovery box (3) has gas storage chambers (33) at both ends inside. Several heat exchange tubes (34) are provided between the two gas storage chambers (33) of the second waste heat recovery box (3). A second water storage layer (35) is provided between the outer wall of the heat exchange tubes (34) and the inner wall of the second waste heat recovery box (3).

2. The waste heat recovery equipment according to claim 1, characterized in that: The air intake pipe (11) and the filter box (1) are integrally formed, and the air intake pipe (11) and the filter box (1) are interconnected. The width of the inner wall of the slot (10) is adapted to the width of the outer wall of the collection box (100). The bottom of the guide pipe (14) is connected to the inside of the filter box (1), and the top of the guide pipe (14) is connected to the inside of the through groove (21).

3. The waste heat recovery equipment according to claim 1, characterized in that: The filter box (1) has an installation groove (12) near the top on the front end face. The installation groove (12) has a slot (120) and a sealing plate (13) in the installation groove (12). The sealing plate (13) and the partition plate (130) are integrally formed. The partition plate (130) has a filter screen (131).

4. The waste heat recovery equipment according to claim 1, characterized in that: The insertion ring (20) and the first waste heat recovery box (2) are integrally formed. The width of the inner wall of the sealing cover (24) is adapted to the width of the outer wall of the insertion ring (20). The sealing cover (24) is also provided with a sealing gasket (240). The sealing gasket (240) is bonded and fixed to the sealing cover (24). The width of the outer wall of the sealing gasket (240) is adapted to the width of the inner wall of the insertion ring (20). The sealing cover (24) is fixedly connected to the insertion ring (20) by screws.

5. The waste heat recovery equipment according to claim 1, characterized in that: The loop-shaped channels (21) are evenly spaced, and the left end of the exhaust pipe (26) is connected to the right side of the loop-shaped channels (21). The right end of the exhaust pipe (26) is connected to the gas storage chamber (33) on the left side inside the second waste heat recovery box (3).

6. The waste heat recovery equipment according to claim 1, characterized in that: The first waste heat recovery box (2) has a first inlet pipe (22) connected to the first water storage layer (25) near the top of the front end face, and a first outlet pipe (23) connected to the first water storage layer (25) near the bottom of the front end face, and a first butterfly valve (230) is provided at the end of the first outlet pipe (23).

7. The waste heat recovery equipment according to claim 1, characterized in that: The second waste heat recovery box (3) is provided with a guide pipe (30) at the right end. The heat exchange pipes (34) are distributed in a ring at equal intervals. The top of the outer wall of the second waste heat recovery box (3) is provided with a second water inlet pipe (31) that communicates with the second water storage layer (35). The right end face of the second waste heat recovery box (3) is provided with a second water outlet pipe (32) that communicates with the second water storage layer (35) near the bottom. The end of the second water outlet pipe (32) is provided with a second butterfly valve (320).

8. A flue gas treatment system, comprising a flue gas treatment component (4) and a waste heat recovery device, characterized in that: The waste heat recovery equipment as described in any one of claims 1 to 7, wherein the flue gas treatment component (4) is composed of a water bath (40) and a drying box (41); A vent pipe (400) is provided on the upper surface of the water bath (40) near the left side. A one-way valve (401) is provided on the vent pipe (400). The vent pipe (400) extends into the water bath (40) to one end near the bottom. A water inlet pipe (402) is provided on the top of the water bath (40). A drain pipe (403) is provided on the front end of the water bath (40) near the bottom. The drying box (41) is provided with discharge pipes (410) at both ends. One of the discharge pipes (410) is connected to the internal space at the top of the water bath (40). The drying box (41) is provided with drying cotton (411) inside. The drying box (41) is provided with a top cover (412) at the top.

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