IGCC crude coal gas dust removal and purification process and device

Abstract

The application discloses an IGCC crude coal gas dust removal and purification process and device, and particularly relates to the technical field of crude coal gas dust removal and purification, and the dust removal and purification process comprises the following steps: step one, using a liquid pump to deliver the washing liquid to circulate in the heat exchange pipe and the liquid storage tank; step two, delivering the IGCC crude coal gas to the heat exchange tank, and then to the cyclone filter for primary filtration; step three, delivering the crude coal gas in step two to the scrubber for secondary filtration; and step four, using the waste water filter to filter the waste water for continuous use.The application completes the dust removal and purification of the IGCC crude coal gas by the cooperation of the cyclone filter and the scrubber, and has good dust removal and purification effect; and the heat exchange mechanism is arranged to heat the washing liquid by the heat of the IGCC crude coal gas, so that the viscosity and the surface activity of the washing liquid can be reduced, the mixing effect of the washing liquid and the crude coal gas can be improved, the dust removal and purification effect can be further improved, the heat of the crude coal gas can be recycled and utilized, the energy consumption is reduced, and the application has environmental protection.

Description

Technical Field

[0001] This invention relates to the field of crude coal gas dust removal and purification technology, and more specifically to the IGCC crude coal gas dust removal and purification process and apparatus. Background Technology

[0002] Integrated Gasification Combined Cycle (IGCC) power generation system is an advanced power system that combines coal gasification technology with high-efficiency combined cycle power generation. It boasts both high power generation efficiency and excellent environmental performance, making it a promising clean and efficient method for coal-fired power generation and a hot topic in the global energy and power industry. The IGCC process involves injecting pulverized coal (or coal-water slurry), steam, and compressed pure oxygen obtained through air separation into a gasifier to produce low- to medium-calorific-value synthetic crude gas. This crude gas is then purified through a purification system to remove dust, desulfurization, and impurities, resulting in refined coal gas, which is then fed into the gas-steam combined cycle unit for power generation.

[0003] While the calorific value of gas used in IGCC power generation is not critical, the purity of the gas (such as controlling dust and sulfide content) is extremely important. The purpose of purifying the raw gas is twofold: first, to protect the gas turbine blades and downstream equipment; and second, to ensure that the exhaust gas meets environmental standards. Therefore, dust removal and purification of the IGCC raw gas is necessary, and existing methods typically include dry dust collection and wet scrubbing.

[0004] For example, the prior art disclosure number CN115873641A discloses a crude gas dust removal and purification device and method. This invention ensures the stability and strength of the gas centrifugal field during the dust removal process by arranging multiple stages of re-vortex generators, thus ensuring the efficiency of inertial collision between droplets and dust. It can not only achieve efficient removal of dust from crude gas, but also adapt to the characteristics of crude gas flow fluctuations, and has a certain degree of reliability.

[0005] However, the existing technology has the following problems when used: Since IGCC raw gas has heat, when the high-temperature IGCC raw gas flows into the dry dust collector and wet scrubbing dust collector, the temperature of both will rise. The solid particles in the high-temperature IGCC raw gas collide with the dry dust collector, which will aggravate the wear of the dry dust collector. At the same time, the heat loss will affect the surrounding environment. After long-term storage, the scrubbing liquid used in wet scrubbing dust collector has high viscosity and surface heat, so the scrubbing liquid and raw gas do not mix sufficiently when they come into contact, which will affect the dust removal and purification effect. Based on this, the present invention provides an IGCC raw gas dust removal and purification process and device. Summary of the Invention

[0006] To overcome the aforementioned deficiencies of the prior art, this invention provides an IGCC crude gas dust removal and purification process and apparatus. The process utilizes a cyclone filter and a scrubber to achieve dust removal and purification of the IGCC crude gas, resulting in excellent dust removal and purification. Furthermore, a heat exchange mechanism is incorporated to utilize the heat from the IGCC crude gas to heat the scrubbing liquid, reducing the viscosity and surface activity of the scrubbing liquid. This improves the mixing effect between the scrubbing liquid and the crude gas, further enhancing the dust removal and purification effect. Simultaneously, the heat from the crude gas is recovered and utilized, reducing energy consumption and making the process environmentally friendly, thus addressing the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: IGCC crude gas dust removal and purification process, comprising the following steps:

[0008] Step 1: First, use infusion pump 2 to transfer the washing liquid in the storage tank to the heat exchange tube, and then let it flow back into the storage tank from the heat exchange tube.

[0009] Step 2: After a period of transportation, the crude gas from the IGCC is transported from the inlet pipe to the heat exchange box. The crude gas is then transported through the heat exchange box to the cyclone filter for initial filtration.

[0010] Step 3: The crude coal gas filtered by the cyclone filter is sent to the scrubber. The washing liquid in the storage tank is sent to multiple nozzles by the liquid pump. The multiple nozzles spray the washing liquid upward. The washing liquid collides and mixes with the downward flowing crude coal gas. The clean crude coal gas is discharged through the exhaust port and the wastewater falls into the wastewater tank.

[0011] Step 4: After the wastewater in the wastewater tank is filtered by the wastewater filter, the clean washing liquid is then transported by the second infusion pump to the heat exchange tube and the storage tank for continued use.

[0012] The present invention also includes an IGCC crude gas dust removal and purification device, including a base;

[0013] Drying and filtration unit, used for preliminary filtration of crude coal gas;

[0014] A humidification filtration mechanism, the humidification filtration mechanism including a scrubber, the bottom of the scrubber being connected to a wastewater tank;

[0015] The infusion mechanism is used to deliver washing liquid to react with crude coal gas for dust removal.

[0016] The heat exchange mechanism includes a heat exchange box, a heat exchange tube is fixedly installed inside the heat exchange box, the rear end of the heat exchange tube passes through the heat exchange box and is connected to two T-pipes B, and a wastewater filter is connected to the bottom of the wastewater tank.

[0017] A foam removal mechanism, installed inside the washer, is used to remove foam from the washer.

[0018] In a preferred embodiment, the drying filtration mechanism includes a cyclone filter fixed to the top of the base, and the washer is connected to the cyclone filter via a three-way pipe A.

[0019] In a preferred embodiment, the foam removal mechanism includes a circular mesh plate disposed in the washer. A plurality of strips are fixedly provided at the bottom end of the circular mesh plate, and a plurality of spikes are fixedly provided at the bottom end of each strip. The circular mesh plate is connected to the agitator through a connecting assembly. A rotating rod is fixedly provided at the top end of the circular mesh plate. The top end of the rotating rod passes through the top of the washer and is used to drive the plurality of spikes on the circular mesh plate to rotate.

[0020] In a preferred embodiment, the infusion mechanism includes a storage tank, which is fixed to the top of the base and the rear end of the wastewater tank. The storage tank is equipped with a stirring paddle and an infusion pump. Two T-pipes B are respectively connected to the storage tank and the wastewater filter, and the wastewater filter can perform a filtration function.

[0021] In a preferred embodiment, the connecting assembly includes an L-shaped plate, which is fixed to the washer and the liquid storage tank. The top of the rotating rod and the top of the stirring paddle are rotatably connected to the bottom of the L-shaped plate. The rotating rod and the stirring paddle are connected by a belt drive assembly. A motor is fixedly inserted through the top of the L-shaped plate, and the bottom of the motor output shaft is fixed to the top of the stirring paddle. The motor drives the stirring paddle and the rotating rod to rotate together, eliminating the need for manual operation and making it more time-saving and labor-saving to use.

[0022] In a preferred embodiment, the washer is fixedly provided with two vertically distributed support plates, both of which are located below the circular mesh plate. The top of each support plate is connected to a suction nozzle. The infusion pump is connected to a three-way pipe C, which passes through the washer and connects to the two support plates to realize automatic feeding of washing liquid.

[0023] In a preferred embodiment, a cover plate is hinged to the top of the liquid storage tank, the wastewater filter is fixed to the top of the base, and a second infusion pump is fixed to one side of the top of the wastewater filter. The second infusion pump is connected to the three-way pipe B and the inside of the liquid storage tank. The second infusion pump is used to deliver the washing liquid, so that the washing liquid can circulate in the liquid storage tank, the wastewater filter, the scrubber, and the heat exchange tube.

[0024] In a preferred embodiment, the bottom of the heat exchange box is fixed to the base by a bracket, and the heat exchange box is provided with a plurality of guide plates arranged sequentially from top to bottom. The multiple guide plates are all sleeved on the heat exchange tube. The multiple guide plates can slow down the flow speed of the crude gas, thereby improving the heat exchange effect between the crude gas and the heat exchange tube.

[0025] In a preferred embodiment, an air inlet pipe is fixedly inserted through one side of the heat exchange box, and the air inlet pipe communicates with the inside of the heat exchange box. A drain pipe is fixedly inserted through the bottom of the heat exchange box, and a control valve is fixedly installed on the drain pipe to prevent dirt from flowing out directly and polluting the environment. An exhaust port is fixedly inserted through the side of the washer away from the three-way pipe A, and the exhaust port communicates with the inside of the washer. Multiple lifting rings are fixedly installed on the top of the base to facilitate the lifting of the device.

[0026] The technical effects and advantages of this invention are as follows:

[0027] 1. This invention uses a cyclone filter and a scrubber to complete the dust removal and purification of IGCC crude gas, which has a good dust removal and purification effect. In addition, a heat exchange mechanism is set up to use the heat of IGCC crude gas to heat the scrubbing liquid, which can reduce the viscosity and surface activity of the scrubbing liquid, thereby improving the mixing effect of the scrubbing liquid and crude gas, further improving the dust removal and purification effect. At the same time, the heat of crude gas is recovered and utilized to reduce energy consumption and is environmentally friendly.

[0028] 2. By stirring the washing liquid in the storage tank with a stirring paddle and adding surfactants to the washing liquid by opening the cover, the surface tension of the washing liquid can be reduced, thereby further improving the dust removal and purification effect of the crude coal gas.

[0029] 3. By rotating the rod to drive multiple cones on the circular mesh plate to rotate, the foam generated by the crude coal gas and washing liquid can be removed. The rotation of the circular mesh plate can also generate downward wind force, which can slow down the flow speed of the crude coal gas, thereby better eliminating foam and preventing foam from affecting the subsequent use of the crude coal gas.

[0030] 4. The motor and belt drive assembly drive the agitator and rotating rod to rotate together, which can simultaneously drive the agitator and the circular screen plate to rotate, thus reducing energy consumption. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 This is a side view of the overall structure of the present invention;

[0033] Figure 3 This is a structural diagram of the internal structure of the heat exchanger box of the present invention;

[0034] Figure 4 for Figure 3 Rear view;

[0035] Figure 5 This is a front view of the overall structure of the present invention;

[0036] Figure 6 This is a cross-sectional view of the washer of the present invention;

[0037] Figure 7 This is a cross-sectional view of the liquid storage tank of the present invention;

[0038] Figure 8 This is a structural diagram of the connection component of the present invention;

[0039] Figure 9 This is a bottom view of the circular mesh plate, strip, and cone spike of the present invention.

[0040] The attached diagram is labeled as follows: 1. Base; 2. Drying filtration mechanism; 3. Humidifying filtration mechanism; 4. Infusion mechanism; 5. Heat exchange mechanism; 6. Foam removal mechanism; 7. Connecting assembly; 8. Support plate; 9. Suction nozzle; 10. T-connector C; 11. Cover plate; 12. Infusion pump II; 13. Bracket; 14. Guide plate; 15. Air inlet pipe; 16. Drain pipe; 17. Exhaust port; 18. Lifting ring;

[0041] 201. Cyclone filter;

[0042] 301. Washer; 302. T-pipe A; 303. Wastewater tank;

[0043] 401. Storage tank; 402. Agitator; 403. Infusion pump 1;

[0044] 501. Heat exchanger box; 502. Heat exchanger tube; 503. T-connector B; 504. Wastewater filter;

[0045] 601. Circular mesh plate; 602. Long strip; 603. Spike; 604. Rotating rod;

[0046] 701, L-shaped plate; 702, belt drive assembly; 703, motor. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] This invention provides a dust removal and purification process for IGCC crude gas, comprising the following steps:

[0049] Step 1: First, use infusion pump 212 to deliver the washing liquid in the storage tank 401 to the heat exchange tube 502, and then let it flow back from the heat exchange tube 502 into the storage tank 401.

[0050] Step 2: After a period of transportation, the crude gas of IGCC is transported from the inlet pipe 15 to the heat exchange box 501. The crude gas is then transported through the heat exchange box 501 to the cyclone filter 201 for initial filtration.

[0051] Step 3: The crude coal gas filtered by the cyclone filter 201 is transported to the scrubber 301. The washing liquid in the storage tank 401 is transported to multiple nozzles by the liquid pump 403. The multiple nozzles spray the washing liquid upwards. The washing liquid collides and mixes with the downward flowing crude coal gas. The clean crude coal gas is discharged through the exhaust port 17, and the wastewater falls into the wastewater tank 303.

[0052] Step 4: After the wastewater in wastewater tank 303 is filtered by wastewater filter 504, the clean washing liquid is then transported by infusion pump 2 12 to heat exchange tube 502 and storage tank 401 for continued use.

[0053] Refer to the instruction manual appendix Figure 1-9 The present invention provides a dust removal and purification device for IGCC crude gas, including a base 1, a drying filtration mechanism 2, a humidifying filtration mechanism 3, a liquid conveying mechanism 4, a heat exchange mechanism 5, and a foam removal mechanism 6. The top of the base 1 is fixedly provided with multiple lifting rings 18 to facilitate the hoisting of the device.

[0054] The drying filtration mechanism 2 includes a cyclone filter 201, which is fixed to the top of the base 1;

[0055] The humidification filtration mechanism 3 includes a scrubber 301, which is connected to the cyclone filter 201 via a three-way pipe A302. A wastewater tank 303 is connected to the bottom of the scrubber 301. Two vertically distributed support plates 8 are fixedly installed inside the scrubber 301, both of which are located below the circular mesh plate 601. A suction nozzle 9 is connected to the top of each of the two support plates 8 for spraying out washing liquid to collide and mix with the crude coal gas, thereby improving the dust removal and purification effect of the crude coal gas. An exhaust port 17 is fixedly installed on the side of the scrubber 301 away from the three-way pipe A302. The exhaust port 17 is connected to the inside of the scrubber 301 for discharging the filtered crude coal gas.

[0056] like Figure 1-2 As shown in Figures 4, 6-7, the infusion mechanism 4 includes a storage tank 401, which is fixed to the top of the base 1 and the rear end of the wastewater tank 303. The storage tank 401 is equipped with a stirring paddle 402 and an infusion pump 403. A three-way pipe C10 is connected to the infusion pump 403. The three-way pipe C10 passes through the washer 301 and is connected to two support plates 8 to realize the automatic feeding of washing liquid.

[0057] like Figure 1-5As shown, the heat exchange mechanism 5 includes a heat exchange box 501, and a heat exchange tube 502 is fixedly installed inside the heat exchange box 501. The rear end of the heat exchange tube 502 passes through the heat exchange box 501 and is connected to two three-way pipes B503. The bottom end of the wastewater tank 303 is connected to a wastewater filter 504. The two three-way pipes B503 are respectively connected to the liquid storage tank 401 and the wastewater filter 504.

[0058] Furthermore, the wastewater filter 504 is fixed to the top of the base 1. A second infusion pump 12 is fixedly installed on one side of the top of the wastewater filter 504. The second infusion pump 12 is connected to the three-way pipe B503 and the inside of the storage tank 401. The second infusion pump 12 is used to deliver the washing liquid, so that the washing liquid can circulate in the storage tank 401, the wastewater filter 504, the scrubber 301, and the heat exchange tube 502.

[0059] Furthermore, the bottom end of the heat exchange box 501 is fixed to the base 1 by the bracket 13. The heat exchange box 501 is provided with a plurality of guide plates 14 arranged from top to bottom. The multiple guide plates 14 are all sleeved on the heat exchange tube 502. The guide plates 14 can slow down the flow speed of the crude gas, thereby improving the heat exchange effect between the crude gas and the heat exchange tube 502. An air inlet pipe 15 is fixedly inserted through one side of the heat exchange box 501. The air inlet pipe 15 is connected to the inside of the heat exchange box 501. A drain pipe 16 is fixedly inserted through the bottom end of the heat exchange box 501. A control valve is fixedly installed on the drain pipe 16.

[0060] like Figure 6 , 9 As shown, the foam removal mechanism 6 includes a circular mesh plate 601 disposed in the washer 301. A plurality of strips 602 are fixedly disposed at the bottom end of the circular mesh plate 601, and a plurality of cone spikes 603 are fixedly disposed at the bottom end of each strip 602. The circular mesh plate 601 is connected to the stirring paddle 402 through a connecting component 7.

[0061] In use, the crude gas from the IGCC is transported to the heat exchange box 501. The crude gas passes through multiple guide plates 14 upwards and then flows into the cyclone filter 201. After preliminary filtration by the cyclone filter 201, the crude gas is then transported to the scrubber 301 through the three-way pipe A302. Multiple nozzles on the two support plates 8 spray scrubbing liquid upwards. The scrubbing liquid collides and mixes with the downward-flowing crude gas, thereby completing the secondary filtration of the crude gas and improving the filtration effect of the crude gas.

[0062] Furthermore, the washing liquid in the storage tank 401 is drawn by the infusion pump 212. The washing liquid is heated by the crude gas when it flows in the heat exchange tube 502, and then it is transported back to the storage tank 401. This facilitates the high-temperature heating of the washing liquid by the crude gas. The increased temperature of the washing liquid reduces its viscosity and surface activity, thereby improving the mixing effect between the washing liquid and the crude gas, and thus improving the dust removal and purification effect of the crude gas. The heat exchange mechanism 5 not only cools down the crude gas before filtration to prevent the high-temperature crude gas from corroding the cyclone filter 201 and the scrubber 301, but also recovers and utilizes the heat of the crude gas, thereby reducing energy consumption and being environmentally friendly.

[0063] Refer to the instruction manual appendix Figure 1-6 8. A rotating rod 604 is fixedly provided at the top of the circular mesh plate 601. The top of the rotating rod 604 passes through the top of the washer 301. The connecting assembly 7 includes an L-shaped plate 701. The L-shaped plate 701 is fixed on the washer 301 and the liquid storage tank 401. The top of the rotating rod 604 and the top of the stirring paddle 402 are rotatably connected to the bottom of the L-shaped plate 701. The rotating rod 604 and the stirring paddle 402 are connected by a belt drive assembly 702.

[0064] Furthermore, a motor 703 is fixedly inserted through the top of the L-shaped plate 701, and the bottom end of the output shaft of the motor 703 is fixed to the top end of the stirring paddle 402. The motor 703 drives the stirring paddle 402 and the rotating rod 604 to rotate together, eliminating the need for manual operation and making it more time-saving and labor-saving to use. A cover plate 11 is hinged to the top of the liquid storage tank 401.

[0065] By opening the cover 11, surfactants can be added to the storage tank 401. The washing liquid in the storage tank 401 can be stirred by the agitator 402, which can also reduce the surface tension of the washing liquid and further improve the dust removal and purification effect of the crude coal gas. The agitator 402 is driven to rotate by the motor 703, and the washing liquid and surfactant can be automatically stirred without manual operation. The agitator 402 drives the rotating rod 604 to rotate through the belt drive assembly 702. The rotating rod 604 drives the multiple cones 603 on the circular mesh plate 601 to rotate, removing the foam generated by the crude coal gas and washing liquid. The rotation of the circular mesh plate 601 can generate downward wind force, which can slow down the flow speed of the crude coal gas, thereby better eliminating foam and preventing foam from affecting the subsequent use of the crude coal gas.

[0066] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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. The IGCC crude gas dust removal and purification process is characterized by: Includes the following steps: Step 1: First, use infusion pump 2 (12) to transport the washing liquid in the storage tank (401) to the heat exchange tube (502), and then flow back from the heat exchange tube (502) to the storage tank (401); Step 2: After a period of transportation, the crude gas of IGCC is transported from the inlet pipe (15) to the heat exchange box (501). The crude gas is then transported through the heat exchange box (501) to the cyclone filter (201) for initial filtration. Step 3: The crude coal gas filtered by the cyclone filter (201) is transported to the scrubber (301). The washing liquid in the storage tank (401) is transported to multiple nozzles by the liquid pump (403). The multiple nozzles spray the washing liquid upwards. The washing liquid collides and mixes with the downward flowing crude coal gas. The clean crude coal gas is discharged through the exhaust port (17). The wastewater falls into the wastewater tank (303). Step 4: After the wastewater in the wastewater tank (303) is filtered by the wastewater filter (504), the clean washing liquid is then transported by the second infusion pump (12) to the heat exchange tube (502) and the storage tank (401) for continued use.

2. A dust removal and purification device for the IGCC crude gas dust removal and purification process according to claim 1, characterized in that: include: Base (1); Drying and filtration unit (2) is used for preliminary filtration of crude coal gas; A humidification filtration mechanism (3) includes a scrubber (301) with a wastewater tank (303) connected to its bottom. The infusion mechanism (4) is used to convey washing liquid to react with crude coal gas for dust removal; The heat exchange mechanism (5) includes a heat exchange box (501), a heat exchange tube (502) is fixedly installed inside the heat exchange box (501), the rear end of the heat exchange tube (502) passes through the heat exchange box (501) and is connected to two three-way pipes B (503), and the bottom end of the wastewater tank (303) is connected to a wastewater filter (504); A foam removal mechanism (6) is installed inside the washer (301) to remove foam inside the washer (301).

3. The dust removal and purification device according to claim 2, characterized in that: The drying filtration mechanism (2) includes a cyclone filter (201), which is fixed on the top of the base (1). The washer (301) is connected to the cyclone filter (201) through a three-way pipe A (302).

4. The dust removal and purification device according to claim 2, characterized in that: The foam removal mechanism (6) includes a circular mesh plate (601) disposed in the washer (301). Multiple strips (602) are fixedly provided at the bottom end of the circular mesh plate (601), and multiple spikes (603) are fixedly provided at the bottom end of each strip (602). The circular mesh plate (601) is connected to the stirring paddle (402) through a connecting component (7). A rotating rod (604) is fixedly provided at the top end of the circular mesh plate (601), and the top end of the rotating rod (604) penetrates through the top of the washer (301).

5. The dust removal and purification device according to claim 4, characterized in that: The infusion mechanism (4) includes a storage tank (401), which is fixed to the top of the base (1) and the rear end of the wastewater tank (303). The storage tank (401) is equipped with a stirring paddle (402) and an infusion pump (403) inside. Two three-way pipes B (503) are respectively connected to the storage tank (401) and the wastewater filter (504).

6. The dust removal and purification device according to claim 5, characterized in that: The connecting assembly (7) includes an L-shaped plate (701), which is fixed on the washer (301) and the liquid storage tank (401). The top of the rotating rod (604) and the top of the stirring paddle (402) are rotatably connected to the bottom of the L-shaped plate (701). The rotating rod (604) and the stirring paddle (402) are connected by a belt drive assembly (702). A motor (703) is fixedly inserted through the top of the L-shaped plate (701), and the bottom end of the output shaft of the motor (703) is fixed to the top of the stirring paddle (402).

7. The dust removal and purification device according to claim 5, characterized in that: The washer (301) is fixedly provided with two vertically distributed support plates (8), both of which are located below the circular mesh plate (601). The top of each support plate (8) is connected to a suction nozzle (9). The infusion pump (403) is connected to a three-way pipe C (10), which passes through the washer (301) and is connected to the two support plates (8).

8. The dust removal and purification device according to claim 5, characterized in that: The top of the liquid storage tank (401) is hinged with a cover plate (11), the wastewater filter (504) is fixed on the top of the base (1), and a second infusion pump (12) is fixed on one side of the top of the wastewater filter (504). The second infusion pump (12) is connected to the three-way pipe B (503) and the inside of the liquid storage tank (401).

9. The dust removal and purification device according to claim 2, characterized in that: The bottom of the heat exchange box (501) is fixed to the base (1) by a bracket (13). The heat exchange box (501) is provided with multiple guide plates (14) arranged from top to bottom. The multiple guide plates (14) are all sleeved on the heat exchange tube (502).

10. The dust removal and purification device according to claim 2, characterized in that: An air inlet pipe (15) is fixedly inserted through one side of the heat exchange box (501), and the air inlet pipe (15) is connected to the inside of the heat exchange box (501). A drain pipe (16) is fixedly inserted through the bottom of the heat exchange box (501), and a control valve is fixedly installed on the drain pipe (16). An exhaust port (17) is fixedly inserted through the side of the washer (301) away from the three-way pipe A (302), and the exhaust port (17) is connected to the inside of the washer (301). Multiple hanging rings (18) are fixedly installed on the top of the base (1).

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