Multi-stage adsorption and capture device and method for flue gas

Abstract

This invention relates to the field of flue gas treatment technology, specifically a multi-stage adsorption and collection device and method for flue gas. The device and method include a tower, an upper partition plate, a lower partition plate, a separating cylinder, and a transmission device. When the distance between the upper and lower partition plates increases, the transmission device drives the separating cylinder downwards, causing floats in the outer cavity to roll into the inner cavity. When the airflow velocity decreases, the floats fall into the outer cavity, and the separating cylinder prevents them from returning to the inner cavity. At the end of the flue gas treatment, the airflow velocity is reduced, causing some floats to turbulently move into the outer cavity of the receiving chamber. Clean water is pumped into the cleaning pipe to clean the floats. This invention improves the mass transfer effect of the floats, allowing adjustment of the distance between the upper and lower partition plates according to the airflow velocity to accommodate a wider range of airflow velocities. The transmission device drives the separating cylinder to move up and down reciprocally, rubbing the floats in the inner and outer cavities, thus improving the cleaning effect on the floats.

Description

Technical Field

[0001] This invention relates to the field of flue gas treatment technology, and is a multi-stage adsorption and capture device and method for flue gas. Background Technology

[0002] Flue gas treatment often uses turbulent ball towers. A turbulent ball tower is a highly efficient gas purification device. A turbulent ball tower includes a tower body, an air inlet on the lower side of the tower body, a chimney at the top of the tower body, a spray system inside the tower body, a demister below the spray system, and two layers of tower plates below the demister. A cavity filled with floating balls is formed between the two layers of tower plates. The cavity is filled with several small floating plastic balls.

[0003] During operation, the airflow passes through at high speed from bottom to top, while the liquid sprayed from the spray system is sprayed from top to bottom, impacting these small balls and putting them into a state of violent tumbling and rotation. Through the violent turbulence of the small balls, the contact area required for mass transfer is greatly increased, and the liquid and gas are constantly agitated, accelerating the mass transfer rate of "mass exchange" that transfers pollutants (such as dust and harmful gas molecules) from the exhaust gas to the washing liquid, thus enhancing the mass transfer process.

[0004] However, the gas flow rate is critical when introducing gas into the turbulent ball tower. If the gas flow rate is too low, it will not reach the critical velocity required for the plastic balls to collide, thus reducing the mass transfer effect in the turbulent ball tower. Conversely, if the gas flow rate is too high, the plastic balls will be pressed against the upper baffle plate, preventing them from colliding and also affecting the mass transfer effect in the turbulent ball tower.

[0005] Chinese patent document CN206355794U discloses a turbulent sphere tower, comprising a cylindrical body, a gas inlet pipe, a liquid inlet pipe, a liquid outlet, a gas outlet, turbulent spheres, a first orifice plate, a second orifice plate, and a trapezoidal ring. The gas inlet pipe and liquid outlet are located at the bottom of the cylindrical body, and the gas outlet is located at the top. The first and second orifice plates are arranged sequentially inside the cylindrical body, with the turbulent spheres positioned between them. A liquid inlet is located above the first orifice plate, and the liquid inlet pipes include a first liquid inlet pipe and a second liquid inlet pipe, arranged parallel to each other above the first orifice plate. Spray heads are also installed on the first and second liquid inlet pipes. A trapezoidal ring is positioned between the liquid inlet pipe and the gas outlet. This technology has the advantages of improving the spraying effect of waste gas during treatment, facilitating more thorough contact between waste gas, water, and the turbulent spheres, thereby improving waste gas treatment efficiency.

[0006] Chinese patent document CN208372726U discloses a turbulent ball tower for fluoride and dust removal, comprising a tower body, wherein the tower body is arranged from top to bottom as a swirl plate dust removal tray, a circulating spray pipe, a grid plate, and a turbulent ball grid plate layer. The advantages of this technology are: the intense turbulence of the turbulent balls ensures sufficient contact between the gas, liquid, and solid phases, resulting in good mass transfer; the unique design of the circulating spray pipe allows for a large spray area for the circulating liquid, enabling more thorough contact between the rising gas and the circulating liquid, thus increasing the absorption effect; the organic combination of the turbulent ball tower and the swirl plate dust removal tray allows for stable operation even under high gas-liquid loads, with low pressure drop, high operational flexibility, and effective removal of dust and mist droplets.

[0007] While the aforementioned existing technologies can improve the gas-liquid-solid three-phase contact efficiency when treating waste gas, their fixed turbulent spherical tower structure lacks dynamic adaptability to changes in airflow velocity, making it difficult to adjust the number of floats and the internal spatial layout of the tower. This results in unstable mass transfer efficiency under varying operating conditions, a high risk of mist entrainment, and inconvenient maintenance. Therefore, there is an urgent need to develop a multi-stage flue gas adsorption and capture device to solve the above problems. Summary of the Invention

[0008] This invention provides a multi-stage adsorption and capture device and method for flue gas, which overcomes the shortcomings of the prior art. It can effectively solve the problem that when existing turbulent ball towers are used for flue gas treatment, the airflow velocity is too fast, which is not conducive to the turbulence of the float and leads to a reduction in mass transfer effect.

[0009] One of the technical solutions of the present invention is achieved through the following measures: a multi-stage flue gas adsorption and capture device, comprising a tower, an upper partition plate, a lower partition plate, a separator cylinder, and a transmission device. An expansion section is provided in the middle of the tower. An upper partition plate is provided above the expansion section inside the tower and can slide up and down on the inner wall of the tower. A lower partition plate is provided below the expansion section inside the tower and is fixedly connected to the inner wall of the tower. The cavity between the expansion section, the upper partition plate, and the lower partition plate inside the tower forms a receiving cavity. A separator cylinder coaxial with the lower partition plate is provided in the receiving cavity. A transmission device is provided between the separator cylinder and the upper partition plate to drive the separator cylinder to move up and down. A spray structure is provided above the upper partition plate.

[0010] The following are further optimizations and / or improvements to one of the above-mentioned inventive technical solutions: The diameter of the aforementioned enlarged section is larger than the diameter of both ends of the tower. An air inlet is provided at the bottom of the tower, and an exhaust outlet is provided at the top of the tower. An upper vent hole is provided on the upper partition plate, and a lower vent hole is provided on the lower partition plate. A spring that allows the upper partition plate to slide up and down is connected between the upper end face of the upper partition plate and the top of the tower. Multiple slots are evenly distributed along the circumference of the lower partition plate.

[0011] The above-mentioned spray structure includes spray pipes. Multiple interconnected spray pipes are arranged above the upper partition plate inside the tower along the circumference of the tower. Each spray pipe has multiple spray holes.

[0012] The aforementioned dividing cylinder includes a straight cylindrical section and a conical section with the small end facing upwards. The straight cylindrical section and the conical section are fixedly connected. The straight cylindrical section has multiple dividing grooves evenly distributed along the circumferential direction. The multiple dividing grooves divide the straight cylindrical section into multiple spaced insert plates. The insert plates are slidably inserted into the corresponding slots in the circumferential direction of the lower partition plate.

[0013] The aforementioned partition cylinder divides the receiving cavity into an inner cavity and an outer cavity. The cavity between the upper partition, the lower partition, and the partition cylinder forms the inner cavity, while the cavity between the expanded portion and the outside of the partition cylinder forms an annular outer cavity. Both the inner and outer cavities are filled with floats.

[0014] The aforementioned transmission device includes a vertically arranged sliding rack, a fixed rack, and a rotating shaft. The lower end of the sliding rack is fixedly connected to the upper end of the partition cylinder, and the upper end of the sliding rack passes through the upper partition and slides against the inner wall of the tower and the upper partition. The fixed rack is located on one side of the sliding rack and is fixedly mounted on the inner wall of the tower. The rotating shaft is horizontally arranged and rotatably mounted on the upper partition. A small gear and a large gear with a diameter larger than the small gear are coaxially fixed on the rotating shaft. The large gear meshes with the sliding rack for transmission, and the small gear meshes with the fixed rack for transmission.

[0015] The diameter of the large gear is twice the diameter of the small gear.

[0016] The above also includes a cleaning assembly, which is located in the upper part of the outer cavity of the receiving cavity. The cleaning assembly includes a cleaning pipe, which is fixedly installed in a ring shape on the upper cavity wall of the outer cavity of the receiving cavity. The water inlet of the cleaning pipe is connected to the water pump through a hose. Multiple water spray holes are evenly distributed around the circumference of the cleaning pipe.

[0017] A support ring is provided between the outer side of the straight section of the aforementioned separator and the inner wall of the expansion section. The support ring is located at the bottom wall of the outer cavity of the receiving cavity, and multiple water filter holes are provided on the support ring.

[0018] The second technical solution of the present invention is achieved through the following measures: an adsorption and collection method for a multi-stage flue gas adsorption and collection device, comprising the following steps: S1, the flue gas flows from bottom to top inside the tower, enters the inner cavity of the receiving chamber through the lower vent, and drives the floats in the inner cavity to turbulently move and collide to carry out mass transfer. When the airflow velocity increases, the airflow pushes the upper partition plate to move upward, increasing the distance between the upper and lower partition plates. When the distance between the upper and lower partition plates increases, the transmission device drives the separator cylinder to move downward, causing the floats in the outer cavity of the receiving chamber to roll into the inner cavity. When the airflow velocity decreases, the floats that have turbulently moved into the outer cavity of the receiving chamber fall into the outer cavity, and the separator cylinder prevents the floats from returning to the inner cavity. S2, at the end of flue gas treatment, the airflow velocity of the flue gas is slowly reduced to facilitate the turbulent movement of some floats to the outer cavity of the receiving cavity when the separator moves upward; S3, when the float needs to be cleaned, the water pump is started to pump clean water into the cleaning pipe. At the same time as water is sprayed through the cleaning pipe, the air pump is started to pump air into the tower in a pulse form, driving the upper partition plate to move up and down.

[0019] This invention improves the mass transfer effect of the float, and realizes the adjustment of the distance between the upper and lower partitions according to the airflow velocity to adapt to a wider range of airflow velocities. The transmission device drives the partition cylinder to move up and down reciprocally, rubbing the float in the inner and outer cavities, thereby improving the cleaning effect of the float. Attached Figure Description

[0020] Appendix Figure 1 This is a schematic diagram of the multi-stage adsorption and capture device for flue gas in Embodiment 1 of the present invention.

[0021] Appendix Figure 2 This is a front view of the multi-stage adsorption and capture device for flue gas in Embodiment 1 of the present invention.

[0022] Appendix Figure 3 Appendix to this invention Figure 2 A cross-sectional view along the AA direction.

[0023] Appendix Figure 4 This is a diagram showing the state of the upper partition plate moving upwards in the multi-stage flue gas adsorption and capture device in Embodiment 1 of the present invention.

[0024] Appendix Figure 5 This is a cross-sectional view of the multi-stage adsorption and capture device for flue gas in Embodiment 1 of the present invention.

[0025] Appendix Figure 6 Appendix to the Invention Figure 5 Enlarged view of point B in the middle.

[0026] Appendix Figure 7 This is a cross-sectional view from another angle of the multi-stage adsorption and capture device for flue gas in Embodiment 1 of the present invention.

[0027] Appendix Figure 8 Appendix to the Invention Figure 7 Enlarged view of point C in the middle.

[0028] The codes in the attached diagram are as follows: 1 for tower, 2 for upper partition, 3 for lower partition, 4 for partition cylinder, 5 for expansion section, 6 for air inlet, 7 for exhaust port, 8 for upper vent, 9 for lower vent, 10 for spring, 11 for slot, 12 for spray pipe, 13 for filter hole, 14 for straight section, 15 for conical section, 16 for partition groove, 17 for insert plate, 18 for inner cavity, 19 for outer cavity, 20 for float, 21 for sliding rack, 22 for fixed rack, 23 for pinion, 24 for gear, 25 for cleaning pipe, and 26 for support ring. Detailed Implementation

[0029] The present invention is not limited to the following embodiments, and the specific implementation can be determined according to the technical solution of the present invention and the actual situation.

[0030] The present invention will be further described below with reference to embodiments: Example 1: As shown in the attached document Figures 1 to 3 As shown, the multi-stage flue gas adsorption and capture device includes a tower 1, an upper partition plate 2, a lower partition plate 3, a separator cylinder 4, and a transmission device. An expansion section 5 is provided in the middle of the tower 1. An upper partition plate 2 is provided above the expansion section 5 inside the tower 1. The upper partition plate 2 can slide up and down on the inner wall of the tower 1. A lower partition plate 3 is provided below the expansion section 5 inside the tower 1. The lower partition plate 3 is fixedly connected to the inner wall of the tower 1. The cavity between the expansion section 5, the upper partition plate 2, and the lower partition plate 3 inside the tower 1 forms a receiving cavity. A separator cylinder 4 coaxial with the lower partition plate 3 is provided in the receiving cavity. A transmission device is provided between the separator cylinder 4 and the upper partition plate 2 to drive the separator cylinder 4 to move up and down. A spray structure is provided above the upper partition plate 2.

[0031] Example 2: As an optimization of the above examples, as shown in the appendix Figures 1 to 6 As shown, the diameter of the enlarged part 5 is larger than the diameter of both ends of the tower 1. The lower part of the tower 1 is provided with an air inlet 6 and the top of the tower 1 is provided with an exhaust port 7. The upper partition plate 2 is provided with an upper vent hole 8 and the lower partition plate 3 is provided with a lower vent hole 9. A spring 10 that allows the upper partition plate 2 to slide up and down is connected between the upper end face of the upper partition plate 2 and the top of the tower 1. The lower partition plate 3 is provided with multiple slots 11 evenly distributed along the circumference.

[0032] As needed, the spring 10 in this invention can be a tension spring, used to bear part of the weight of the upper partition, so that the upper partition can be moved upward more easily after ventilation.

[0033] Example 3: As an optimization of the above examples, as shown in the appendix Figures 3 to 5 As shown, the spray structure includes spray pipes 12. Multiple interconnected spray pipes 12 are arranged above the upper partition plate 2 inside the tower 1 along the circumference of the tower 1, and multiple spray holes are opened on each spray pipe 12.

[0034] Example 4: As an optimization of the above embodiments, as shown in the appendix Figure 6 As shown, the separator 4 includes a straight cylindrical section 14 and a conical section 15 with the small end facing upward. The straight cylindrical section 14 and the conical section 15 are fixedly connected. The straight cylindrical section 14 has a plurality of dividing grooves 16 evenly distributed along the circumferential direction. The plurality of dividing grooves 16 divide the straight cylindrical section 14 into a plurality of spaced insert plates 17. The insert plates 17 are slidably inserted into the corresponding slots 11 in the circumferential direction of the lower partition plate 3.

[0035] Example 5: As an optimization of the above embodiments, as shown in the appendix Figure 3 As shown, the partition cylinder 4 divides the receiving cavity into an inner cavity 18 and an outer cavity 19. The cavity between the upper partition plate 2, the lower partition plate 3 and the partition cylinder 4 forms the inner cavity 18, and the cavity between the expansion part 5 and the outside of the partition cylinder 4 forms the annular outer cavity 19. Both the inner cavity 18 and the outer cavity 19 are filled with floats 20. The airflow is pumped into the tower 1 from the air inlet 6 at the bottom of the tower 1 by the air pump, and flows from bottom to top in the tower 1. It enters the inner cavity 18 of the receiving cavity through the lower vent hole 9, and drives the floats 20 in the inner cavity 18 to turbulence and collide to carry out mass transfer.

[0036] When the airflow velocity increases, the airflow pushes the upper partition 2 upward, increasing the distance between the upper partition 2 and the lower partition 3. The transmission device drives the separator cylinder 4 downward, causing the floats 20 in the outer cavity 19 to roll into the inner cavity 18, increasing the number of floats 20 participating in mass transfer. This avoids the situation where the distance between the upper partition 2 and the lower partition 3 is too small when the airflow velocity is too high, which would be detrimental to the turbulence of the floats 20. It also reduces the probability of collisions between the floats 20 and reduces the mass transfer effect. This allows the distance between the upper partition 2 and the lower partition 3 to be adjusted according to the airflow velocity to adapt to a wider range of airflow velocities. When the airflow velocity decreases, since there is no rising airflow in the outer cavity 19 of the receiving cavity, the float 20 that is turbulent to the outer cavity 19 falls into the outer cavity 19. The separator 4 restricts the float 20 to return to the inner cavity 18. Thus, when the airflow velocity decreases and the distance between the upper separator 2 and the lower separator 3 decreases, the number of floats 20 between the upper separator 2 and the lower separator 3 is not too large, which would affect the mass transfer effect.

[0037] Example 6: As an optimization of the above embodiments, as shown in the appendix Figure 3 and 8As shown, the transmission device includes a vertically arranged sliding rack 21, a fixed rack 22, and a rotating shaft. The lower end of the sliding rack 21 is fixedly connected to the upper end of the partition cylinder 4, and the upper end of the sliding rack 21 passes through the upper partition plate 2 and slides in cooperation with the inner wall of the tower cylinder 1 and the upper partition plate 2. The fixed rack 22 is arranged on one side of the sliding rack 21 and is fixedly arranged on the inner side wall of the tower cylinder 1. The axis of the rotating shaft is horizontally arranged and rotatably mounted on the upper partition plate 2. A small gear 23 and a large gear 24 with a diameter larger than the small gear 23 are coaxially fixed on the rotating shaft. The large gear 24 meshes with the sliding rack 21 for transmission, and the small gear 23 meshes with the fixed rack 22 for transmission. When the upper partition plate 2 moves up and down, the fixed rack 22 drives the small gear 23 to drive the rotating shaft to rotate, the rotating shaft drives the large gear 24 to rotate, and the large gear 24 drives the sliding rack 21 to move down, thereby driving the partition cylinder 4 to move down.

[0038] Example 7: As an optimization of the above embodiments, as shown in the appendix Figure 8 As shown, the diameter of the large gear 24 is twice the diameter of the small gear 23.

[0039] Example 8: As an optimization of the above embodiments, as shown in the appendix Figure 3 and 6 As shown, it also includes a cleaning assembly for cleaning the float 20 after use. The cleaning assembly is located in the upper part of the outer cavity 19 of the receiving cavity. The cleaning assembly includes a cleaning pipe 25, which is fixedly installed in a ring shape on the upper cavity wall of the outer cavity 19 of the receiving cavity. The inlet of the cleaning pipe 25 is connected to the water pump through a hose. Multiple spray holes are evenly distributed around the cleaning pipe 25 to make clean water evenly sprayed into the inner cavity 18 and the outer cavity 19.

[0040] If the float 20 needs to be cleaned after prolonged use, start the water pump to pump clean water into the cleaning pipe 25, and spray the clean water into the inner cavity 18 and the outer cavity 19. At the same time, start the air pump to pump air into the tower 1 in a pulse form, which drives the upper partition 2 to move up and down. Through the transmission device, the partition cylinder 4 moves up and down back and forth, thereby rubbing the float 20 in the inner cavity 18 and the outer cavity 19 to improve the cleaning effect.

[0041] Example 9: As an optimization of the above embodiments, as shown in the appendix Figure 3 and 6 As shown, a support ring 26 is provided between the outer side of the straight section 14 of the separator 4 and the inner wall of the expansion section 5. The support ring 26 is located at the bottom wall of the outer cavity 19 of the receiving cavity. Multiple filter holes 13 are provided on the support ring 26 to facilitate the separation of sewage and float 20 after cleaning float 20.

[0042] Example 10: As attached Figures 1 to 8 As shown, the adsorption and collection method of the multi-stage flue gas adsorption and collection device includes the following steps: S1, the flue gas flows from bottom to top in the tower 1, enters the inner cavity 18 of the receiving chamber through the lower vent 9, and drives the float 20 in the inner cavity 18 to turbulence and collision for mass transfer. When the airflow velocity increases, the airflow pushes the upper partition 2 to move upward, increasing the distance between the upper partition 2 and the lower partition 3. When the distance between the upper partition 2 and the lower partition 3 increases, the transmission device drives the separator cylinder 4 to move downward, causing the float 20 in the outer cavity 19 of the receiving chamber to roll into the inner cavity 18. When the airflow velocity decreases, the float 20 that has turbulently reached the outer cavity 19 of the receiving chamber falls into the outer cavity 19, and the separator cylinder 4 restricts the float 20 to return to the inner cavity 18. S2, at the end of flue gas treatment, the airflow velocity of the flue gas is slowly reduced so that when the separator cylinder 4 moves upward, some of the floats 20 will move turbulently to the outer cavity 19 of the receiving cavity; S3, when it is necessary to clean the float 20, start the water pump to pump clean water into the cleaning pipe 25. At the same time as water is sprayed through the cleaning pipe 25, start the air pump to pump air into the tower 1 in a pulse form, driving the upper partition plate 2 to move up and down.

[0043] In summary, the present invention improves the mass transfer effect of the float 20, realizes the adjustment of the distance between the upper partition 2 and the lower partition 3 according to the airflow velocity to adapt to a wider range of airflow velocities, and drives the partition cylinder 4 to move up and down reciprocally through the transmission device to rub the float 20 in the inner cavity 18 and the outer cavity 19, thereby improving the cleaning effect of the float 20.

[0044] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A multi-stage flue gas adsorption and capture device, characterized in that... The system includes a tower, an upper partition plate, a lower partition plate, a partition cylinder, and a transmission device. An expansion section is provided in the middle of the tower. An upper partition plate is provided above the expansion section inside the tower and can slide up and down on the inner wall of the tower. A lower partition plate is provided below the expansion section inside the tower and is fixedly connected to the inner wall of the tower. The cavity between the expansion section, the upper partition plate, and the lower partition plate inside the tower forms a receiving cavity. A partition cylinder coaxial with the lower partition plate is provided in the receiving cavity. A transmission device is provided between the partition cylinder and the upper partition plate to drive the partition cylinder to move up and down. A spray structure is provided above the upper partition plate. The diameter of the expanded part is larger than the diameter of both ends of the tower. An air inlet is provided at the bottom of the tower and an exhaust outlet is provided at the top of the tower. An upper vent hole is provided on the upper partition plate and a lower vent hole is provided on the lower partition plate. A spring that allows the upper partition plate to slide up and down is connected between the upper end face of the upper partition plate and the top of the tower. The spring is a tension spring. Multiple slots are evenly distributed along the circumference of the lower partition plate. The separator includes a straight cylindrical section and a tapered cylindrical section with the small end facing upward. The straight cylindrical section and the tapered cylindrical section are fixedly connected. The straight cylindrical section has multiple dividing grooves evenly distributed along the circumferential direction. The multiple dividing grooves divide the straight cylindrical section into multiple spaced insert plates. The insert plates are slidably inserted into the corresponding slots in the circumferential direction of the lower partition plate. The partition cylinder divides the receiving cavity into an inner cavity and an outer cavity. The cavity between the upper partition plate, the lower partition plate and the inside of the partition cylinder forms the inner cavity, and the cavity between the expanded part and the outside of the partition cylinder forms an annular outer cavity. Both the inner and outer cavities are filled with floats. The transmission device includes a vertically arranged sliding rack, a fixed rack, and a rotating shaft. The lower end of the sliding rack is fixedly connected to the upper end of the partition cylinder, and the upper end of the sliding rack passes through the upper partition and slides against the inner wall of the tower and the upper partition. The fixed rack is located on one side of the sliding rack and is fixedly located on the inner wall of the tower. The axis of the rotating shaft is horizontally arranged and rotatably mounted on the upper partition. A small gear and a large gear with a diameter larger than the small gear are coaxially fixed on the rotating shaft. The large gear meshes with the sliding rack for transmission, and the small gear meshes with the fixed rack for transmission. When the airflow pushes the upper partition plate upward, the fixed rack drives the pinion to rotate the shaft, which in turn drives the large gear to rotate. The large gear then drives the sliding rack downward, thereby driving the partition cylinder downward.

2. The multi-stage flue gas adsorption and capture device according to claim 1, characterized in that... The spray structure includes spray pipes. Multiple interconnected spray pipes are arranged above the upper partition plate inside the tower along the circumference of the tower, and each spray pipe has multiple spray holes.

3. The multi-stage flue gas adsorption and capture device according to claim 1, characterized in that... The diameter of the large gear is twice the diameter of the small gear.

4. The multi-stage flue gas adsorption and capture device according to claim 1, characterized in that... It also includes a cleaning component, which is located in the upper part of the outer cavity of the receiving cavity. The cleaning component includes a cleaning pipe, which is fixedly installed in a ring shape on the upper cavity wall of the outer cavity of the receiving cavity. The water inlet of the cleaning pipe is connected to the water pump through a hose. Multiple water spray holes are evenly distributed around the circumference of the cleaning pipe.

5. The multi-stage adsorption and capture device for flue gas according to claim 4, characterized in that... A support ring is provided between the outer side of the straight section of the separator and the inner wall of the expansion section. The support ring is located at the bottom wall of the outer cavity of the receiving cavity, and multiple water filter holes are provided on the support ring.

6. An adsorption and collection method for a multi-stage flue gas adsorption and collection device according to claim 5, characterized in that... Includes the following steps: S1, the flue gas flows from bottom to top inside the tower, enters the inner cavity of the receiving chamber through the lower vent, and drives the floats in the inner cavity to turbulently move and collide to carry out mass transfer. When the airflow velocity increases, the airflow pushes the upper partition plate to move upward, increasing the distance between the upper and lower partition plates. When the distance between the upper and lower partition plates increases, the transmission device drives the separator cylinder to move downward, causing the floats in the outer cavity of the receiving chamber to roll into the inner cavity. When the airflow velocity decreases, the floats that have turbulently moved into the outer cavity of the receiving chamber fall into the outer cavity, and the separator cylinder prevents the floats from returning to the inner cavity. S2, at the end of flue gas treatment, the airflow velocity of the flue gas is reduced. When the separator moves upward, some of the floats move turbulently into the outer cavity of the receiving cavity. S3, when cleaning the float, pump clean water into the cleaning pipe. At the same time as water is sprayed through the cleaning pipe, air is pumped into the tower to drive the upper baffle to move up and down.

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