Simple anti-blocking overflow device for wet desulfurization tower

Abstract

The application discloses a simple anti-blocking overflow device for a wet desulfurization absorption tower, which comprises an absorption tower, an overflow connecting pipe, a gas sealing device, an overflow vertical pipe, a liquid sealing device and a process water pipe, the absorption tower is connected with the overflow connecting pipe, the overflow connecting pipe is connected with the overflow vertical pipe through flanges, the upper end of the overflow vertical pipe is connected with the gas sealing device through flanges, the lower end of the overflow vertical pipe is connected with the liquid sealing device through flanges, the process water pipe is connected with the overflow vertical pipe through a flange cover, and the position of the overflow connecting pipe is higher than the normal liquid level of the absorption tower. Compared with the prior art, the overflow device can make the liquid level foam in the absorption tower normally discharged, prevent the liquid level from being too high, ensure the stable operation of the desulfurization equipment, automatically prevent the persistence of siphon, and effectively ensure the normal liquid level in the absorption tower.

Description

Technical Field

[0001] This invention belongs to the field of environmental protection technology and equipment, specifically a simple anti-clogging overflow device for wet desulfurization absorption towers. Background Technology

[0002] Currently, thermal power plants generally use wet desulfurization absorption towers to treat sulfur-containing flue gas. As an important device and reaction site in the flue gas desulfurization system, the absorption tower has the characteristics of small footprint, convenient management and maintenance, and high reliability. It is widely used in power, chemical, metallurgical, boiler manufacturing and other environmental protection engineering applications. However, during the operation of wet desulfurization, due to the fluctuation of liquid level, overflow devices are installed on the absorption tower. Therefore, foaming of slurry in the absorption tower and overflow caused by high liquid level fluctuation are common problems in the operation of wet desulfurization. In fact, the overflow of slurry can even lead to siphon phenomenon, causing the working liquid level of the absorption tower to drop, the desulfurization effect to decrease, and the gypsum quality to decline, affecting the stability of the system operation.

[0003] Chinese Patent CN202638237U, with an authorization announcement date of January 2, 2013, discloses a desulfurization tower system. The system includes a liquid seal device on the overflow pipe extending from the absorption tower body and leading to a collection tank. The liquid seal device comprises a shell with an inlet and an outlet. The inlet of the shell is connected to the overflow pipe extending from the tower body, and the outlet of the shell is connected to the overflow pipe leading to the collection tank. The water level at the inlet of the shell is lower than that at the outlet of the shell. The structure has the following disadvantages: First, due to the liquid seal device, the slurry inside the absorption tower will not overflow during normal operation, and the slurry pre-filled in the liquid auxiliary reactor will settle and form scale, which will eventually clog the liquid seal device and prevent overflow. Second, because there is no air purging device on the overflow pipe, a siphon phenomenon can easily form when the liquid level in the tower exceeds the overflow port, causing the slurry in the tower to drop rapidly and resulting in slurry waste. Third, the liquid seal device is required and has a large volume, which increases investment costs and the space occupied by the equipment.

[0004] Chinese patent CN220386203U, with authorization announcement date of January 26, 2024, discloses an overflow pipe observation device for a desulfurization tower. The overflow port of the desulfurization tower is set 2.5 to 3.5m below the liquid level. When the desulfurization tower is working, the liquid level inside the tower is more than 0.5m higher than the overflow port. This has the following disadvantages: First, because the overflow port is set below the liquid level, although the flue gas inside the tower can be liquid-sealed, the foam floating above the liquid level inside the tower cannot be discharged, resulting in a falsely high liquid level inside the tower, an increase in slurry discharge, and a decrease in desulfurization efficiency. Summary of the Invention

[0005] The purpose of this invention is to solve the problems in the prior art by proposing a simple, anti-clogging overflow device for wet desulfurization absorption towers, which can solve at least one of the above problems.

[0006] To achieve the above objectives, this invention proposes a simple, anti-clogging overflow device for a wet desulfurization absorption tower, comprising an absorption tower, an overflow connector, a gas sealing device, an overflow riser, a liquid sealing device, and a process water pipe. The absorption tower is connected to the overflow connector, and the overflow connector is connected to the overflow riser via a flange. The upper end of the overflow riser is connected to the gas sealing device via a flange, and the lower end of the overflow riser is connected to the liquid sealing device via a flange. The process water pipe is connected to the overflow riser via a flange cover. The overflow connector is positioned above the normal liquid level of the absorption tower.

[0007] Preferably, the overflow riser is equipped with an air-sealed maintenance valve and a liquid-sealed maintenance valve, which are respectively located near the air-sealing device and the liquid-sealing device.

[0008] Preferably, the overflow pipe is directly welded and fixed to the absorption tower, the angle α between the center of the overflow pipe and the horizontal is 5°~25°, and the position of the overflow pipe is 0.5~1m higher than the normal liquid level of the absorption tower.

[0009] Preferably, the process water pipe is provided with two nozzles, which are respectively directed toward the overflow pipe and the liquid seal device. The spray angle of the nozzles is 50° to 120°. The center of the overflow pipe corresponds to the center of the corresponding nozzle, and the nozzle directed toward the liquid seal device is located at the center of the overflow riser.

[0010] Preferably, the air-sealing device includes an air-sealing connector, an air-sealing adjusting bolt, an air-sealing fixed cover plate, an air-sealing movable cover plate, an air-sealing support plate, an air-sealing spring, an air-sealing boss ring plate, an air-sealing plate, an air inlet slot, and an air-sealing sealing ring. The upper end of the air-sealing connector is provided with an air-sealing fixed cover plate, and an air-sealing adjusting bolt threadedly connected to the air-sealing fixed cover plate passes through it. The air-sealing movable cover plate and the air-sealing support plate have central openings with a diameter slightly larger than the diameter of the air-sealing adjusting bolt. The air-sealing adjusting bolt passes through the openings in the air-sealing movable cover plate and the air-sealing support plate, and an anti-detachment ring is provided at the tail of the air-sealing adjusting bolt. The air-sealing boss ring plate is fixed to the inner wall of the air-sealing connector, and the air-sealing plate is located below the air-sealing boss ring plate. The air-sealing sealing ring is located between the air-sealing plate and the air-sealing boss ring plate and is fixed to the air-sealing boss ring plate. The two ends of the air-sealing spring are fixedly connected to the air-sealing plate and the air-sealing movable cover plate, respectively. The circumferential surface of the air-sealing connector is provided with several air inlet slots.

[0011] Preferably, the total area of ​​the air inlet slots is greater than the cross-sectional area of ​​the air seal connector.

[0012] Preferably, the aperture of the gas-sealing boss ring plate is 10-20 mm smaller than the inner diameter of the gas-sealing pipe.

[0013] Preferably, the liquid sealing device includes a liquid sealing tube, a liquid sealing adjusting bolt, a liquid sealing fixed cover plate, a liquid sealing movable cover plate, a liquid sealing support plate, a liquid sealing spring, a liquid sealing boss ring plate, a liquid sealing plate, drainage groove holes, and a liquid sealing ring. The lower end of the liquid sealing tube is provided with a liquid sealing fixed cover plate, and a liquid sealing adjusting bolt threadedly connected to the liquid sealing fixed cover plate passes through it. The upper end of the liquid sealing adjusting bolt is provided with a liquid sealing support plate, which directly abuts against the lower end of the liquid sealing movable cover plate. The liquid sealing boss ring plate is fixed to the inner wall of the liquid sealing tube, and the liquid sealing plate is located below the liquid sealing boss ring plate. The liquid sealing ring is located between the liquid sealing plate and the liquid sealing boss ring plate and is fixed to the liquid sealing boss ring plate. The two ends of the liquid sealing spring are fixedly connected to the liquid sealing plate and the liquid sealing movable cover plate, respectively. The circumferential surface of the liquid sealing tube is provided with several drainage groove holes.

[0014] Preferably, the diameter of the hole in the liquid seal boss ring plate is 10-20 mm smaller than the inner diameter of the liquid seal connector, and the total area of ​​the drain groove holes is larger than the cross-sectional area of ​​the liquid seal connector.

[0015] Preferably, the diameter of the overflow connector and the overflow riser is DN200~DN250.

[0016] The beneficial effects of this invention are as follows: By positioning the overflow pipe above the normal liquid level of the absorption tower, this invention enables the normal discharge of foam from the liquid surface inside the absorption tower, preventing artificially high liquid levels and ensuring the stable operation of the desulfurization equipment. The air seal device not only prevents the escape of flue gas from the upper part of the liquid surface of the absorption tower, preventing pollution of the external environment, but also allows outside air to enter the overflow riser pipe when a siphon phenomenon occurs, breaking the balance of the siphon and automatically preventing the siphon from continuing, effectively ensuring the normal liquid level inside the absorption tower.

[0017] The features and advantages of the present invention will be described in detail through embodiments and in conjunction with the accompanying drawings. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a simple anti-clogging overflow device for a wet desulfurization absorption tower according to the present invention; Figure 2 This is a cross-sectional view of the air-sealing device; Figure 3 This is a cross-sectional view of the liquid seal device; Figure 4 This is a partial structural schematic diagram of an overflow device for a simple anti-clogging wet desulfurization absorption tower according to the present invention.

[0019] In the diagram: 1 - Absorption tower, 2 - Overflow pipe, 3 - Gas seal device, 4 - Overflow riser, 5 - Liquid seal device, 6 - Gas seal maintenance valve, 7 - Liquid seal maintenance valve, 8 - Manual ball valve, 9 - Electromagnetic ball valve, 10 - Nozzle, 11 - Process water pipe, 30 - Gas seal pipe, 31 - Gas seal adjusting bolt, 32 - Gas seal fixed cover plate, 33 - Gas seal movable cover plate, 34 - Gas seal support plate, 35 - Gas seal spring, 36 - Gas seal boss ring plate, 37 - Gas seal plate, 38 - Air inlet slot, 39 - Gas seal sealing ring 1, 50 - Liquid seal pipe, 51 - Liquid seal adjusting bolt, 52 - Liquid seal fixed cover plate, 53 - Liquid seal movable cover plate, 54 - Liquid seal support plate, 55 - Liquid seal spring, 56 - Liquid seal boss ring plate, 57 - Liquid seal plate, 58 - Drainage slot, 59 - Liquid seal sealing ring. Detailed Implementation

[0020] See Figure 1 , Figure 2 , Figure 3 and Figure 4 This invention discloses a simple anti-clogging overflow device for a wet desulfurization absorption tower, comprising an absorption tower 1, an overflow pipe 2, a gas sealing device 3, an overflow riser 4, a liquid sealing device 5, and a process water pipe 11. The absorption tower 1 is connected to the overflow pipe 2, and the overflow pipe 2 is connected to the overflow riser 4 via a flange. The upper end of the overflow riser 4 is connected to the gas sealing device 3 via a flange, and the lower end of the overflow riser 4 is connected to the liquid sealing device 5 via a flange. The process water pipe 11 is connected to the overflow riser 4 via a flange cover. The overflow pipe 2 is positioned higher than the normal liquid level of the absorption tower 1.

[0021] The overflow riser 4 is equipped with an air-sealed maintenance valve 6 and a liquid-sealed maintenance valve 7, which are respectively located near the air-sealing device 3 and the liquid-sealing device 5.

[0022] The overflow pipe 2 is directly welded and fixed to the absorption tower 1. The angle α between the center of the overflow pipe 2 and the horizontal is 5°~25°. The position of the overflow pipe 2 is 0.5~1m higher than the normal liquid level of the absorption tower 1.

[0023] The process water pipe 11 is provided with two nozzles 10, which are respectively directed toward the overflow pipe 2 and the liquid seal device 5. The spray angle of the nozzles 10 is 50°~120°. The center of the overflow pipe 2 corresponds to the center of the corresponding nozzle 10. The nozzle 10 facing the liquid seal device 5 is located at the center of the overflow vertical pipe 4.

[0024] The air-sealing device 3 includes an air-sealing connector 30, an air-sealing adjusting bolt 31, an air-sealing fixed cover plate 32, an air-sealing movable cover plate 33, an air-sealing support plate 34, an air-sealing spring 35, an air-sealing boss ring plate 36, an air-sealing plate 37, an air inlet slot 38, and an air-sealing sealing ring 39. The upper end of the air-sealing connector 30 is provided with an air-sealing fixed cover plate 32, and an air-sealing adjusting bolt 31 threadedly passes through the air-sealing fixed cover plate 32. The air-sealing movable cover plate 33 and the air-sealing support plate 34 have a centrally located hole, the diameter of which is slightly larger than the diameter of the air-sealing adjusting bolt 31. The adjusting bolt 31 passes through the openings on the air seal movable cover plate 33 and the air seal support plate 34, and an anti-detachment ring is provided at the tail of the air seal adjusting bolt 31. The air seal boss ring plate 36 is fixed to the inner wall of the air seal connector 30. The air seal plate 37 is located below the air seal boss ring plate 36. The air seal sealing ring 39 is located between the air seal plate 37 and the air seal boss ring plate 36 and is fixed on the air seal boss ring plate 36. The two ends of the air seal spring 35 are fixedly connected to the air seal plate 37 and the air seal movable cover plate 33 respectively. The circumferential surface of the air seal connector 30 is provided with several air inlet slots 38.

[0025] The total area of ​​the air inlet slot 38 is greater than the cross-sectional area of ​​the air seal pipe 30.

[0026] The aperture of the gas-sealing boss ring plate 36 is 10-20 mm smaller than the inner diameter of the gas-sealing pipe 30.

[0027] The liquid sealing device 5 includes a liquid sealing pipe 50, a liquid sealing adjusting bolt 51, a liquid sealing fixing cover plate 52, a liquid sealing movable cover plate 53, a liquid sealing support plate 54, a liquid sealing spring 55, a liquid sealing boss ring plate 56, a liquid sealing plate 57, a drain groove hole 58, and a liquid sealing ring 59. The lower end of the liquid sealing pipe 50 is provided with a liquid sealing fixing cover plate 52, and a liquid sealing adjusting bolt 51 threadedly connected to the liquid sealing fixing cover plate 52 is threaded through it. The upper end of the liquid sealing adjusting bolt 51 is provided with a liquid sealing support plate 54. The liquid seal support plate 54 directly abuts against the lower end of the liquid seal movable cover plate 53. The liquid seal boss ring plate 56 is fixed to the inner wall of the liquid seal mounting tube 50. The liquid seal plate 57 is located below the liquid seal boss ring plate 56. The liquid seal sealing ring 59 is located between the liquid seal plate 57 and the liquid seal boss ring plate 56 and is fixed on the liquid seal boss ring plate 56. The two ends of the liquid seal spring 55 are fixedly connected to the liquid seal plate 57 and the liquid seal movable cover plate 53, respectively. The circumferential surface of the liquid seal mounting tube 50 is provided with a plurality of drainage groove holes 58.

[0028] The diameter of the hole in the liquid seal boss ring plate 56 is 10-20 mm smaller than the inner diameter of the liquid seal connector 50, and the total area of ​​the drain groove hole 58 is larger than the cross-sectional area of ​​the liquid seal connector 50.

[0029] The diameter of the overflow pipe 2 and the overflow riser 4 is DN200~DN250.

[0030] All components of the gas sealing device 3 and the liquid sealing device 5 are made of 2205 stainless steel, and the sealing rings are made of EPDM material.

[0031] The angle α between the center of the overflow pipe and the horizontal is 5°~25°, which is conducive to the return of flushing water to the absorption tower, preventing scale buildup and blockage in the pipe, and also reduces the probability of siphoning when the liquid level is high.

[0032] Working process of this invention: This invention discloses a simple anti-clogging overflow device for a wet desulfurization absorption tower. During operation, firstly, for the gas sealing device 3, when the liquid level in the absorption tower 1 is normal (i.e., lower than the overflow pipe 2), the flue gas in the absorption tower 1 will enter the overflow riser 4, gas sealing device 3, and liquid sealing device 5 through the overflow pipe 2. By turning the gas sealing adjusting bolt 31, the gas sealing movable cover plate 33 moves up and down, thereby changing the tension length of the gas sealing spring 35. This makes the upward tension of the gas sealing spring 35 plus the upward pressure of the flue gas acting on the gas sealing plate 37 slightly greater than the weight of the gas sealing plate 37. This ensures that the gas sealing plate 37 and the gas sealing ring 39 are tightly fitted, preventing gas leakage. When the liquid level in the absorption tower 1 exceeds the overflow pipe 2, and no siphon phenomenon occurs, the flue gas pressure in the overflow riser 4 remains constant, and the air seal plate 37 does not operate, thus forming an air seal. However, after the siphon phenomenon occurs, the overflow pipe 2 and the overflow riser 4 are filled with slurry. When the slurry flows in the pipe, it generates a certain suction force. At this time, the air pressure under the air seal device 3 will decrease, and the weight of the air seal plate 37 will be greater than the sum of the tension of the air seal spring 35 and the flue gas pressure. The air seal plate 37 will then descend, and outside air will enter the overflow riser 4 through the air inlet slot 38, thereby breaking the balance of the siphon and preventing the liquid level in the absorption tower from being too low due to the siphon phenomenon.

[0033] Secondly, regarding the liquid seal device 5, when the liquid level in the absorption tower 1 is normal (i.e., lower than the overflow pipe 2), the flue gas in the absorption tower 1 will enter the overflow riser 4, the gas seal device 3, and the liquid seal device 5 through the overflow pipe 2. By turning the liquid seal adjusting bolt 51, the liquid seal movable cover plate 53 is moved up and down, thereby changing the compression length of the liquid seal spring 55. This makes the upward thrust of the liquid seal spring 55 slightly greater than the sum of the weight of the liquid seal plate 57 and the downward pressure of the flue gas acting on the liquid seal plate 57. This ensures that the liquid seal plate 57 and the liquid seal are in contact. The sealing ring 59 fits tightly to prevent gas leakage. After the liquid level in the absorption tower 1 is higher than the overflow pipe 2, the slurry flows through the overflow pipe 2 and the overflow riser 4 to the liquid seal plate 57. The flue gas pressure in the overflow riser 4 remains unchanged, but a certain amount of slurry accumulates in the overflow riser 4. Due to the addition of the slurry's gravity, the upward thrust of the liquid seal spring 55 will be less than the sum of the gravity on the liquid seal plate 57, the slurry's gravity, and the flue gas pressure. The liquid seal plate 57 descends, and the slurry in the overflow riser 4 is discharged into the trench through the drain hole 58.

[0034] Finally, a manual ball valve 8 and a solenoid ball valve 9 are installed on the process water pipe 11. By switching the solenoid ball valve 9 on a timer, the overflow pipe 2 and the overflow riser 4 can be flushed on a timer to prevent slurry splashing and scaling on the pipe wall. Moreover, when foam overflows from the overflow pipe 2, flushing can also eliminate the foam in the pipe, which is conducive to the normal discharge of foam. When the nozzle 10 is blocked or the solenoid ball valve 9 is damaged, the manual ball valve 8 on the process water pipe 11 can be manually closed to realize the online maintenance function. The air seal maintenance valve 6 and the liquid seal maintenance valve 7 on the overflow riser 4 are normally in the open state. When the air seal device 3 and the liquid seal device 5 malfunction, the corresponding air seal maintenance valve 6 and liquid seal maintenance valve 7 can be closed respectively to realize online maintenance.

[0035] This method ensures normal discharge of liquid when the liquid level in the absorption tower is high, and also has the following advantages compared to other devices and methods: 1. The overflow outlet is positioned 0.5 to 1 meter above the normal liquid level of the absorption tower, which allows foam to be discharged normally from the liquid surface inside the absorption tower, preventing the liquid level from being artificially high and ensuring the stable operation of the desulfurization equipment. The angle α between the center of the overflow pipe and the horizontal is 5° to 25°, which is conducive to the return of flushing water to the absorption tower, preventing scale buildup and blockage inside the pipe, and also reducing the probability of siphoning when the liquid level is high. 2. All components are connected by flanges, and maintenance valves are reasonably set up, which is more conducive to on-site maintenance and repair; 3. By using the timed switch of the electromagnetic ball valve, the overflow pipe and overflow riser can be flushed at regular intervals to prevent slurry splashing from causing scaling on the pipe wall, and also to eliminate foam in the pipe, which is conducive to the normal discharge of foam. 4. The air seal device not only prevents the flue gas above the liquid surface of the absorption tower from escaping and polluting the external environment, but also allows outside air to enter the overflow riser pipe when a siphon occurs, breaking the balance of the siphon and automatically preventing the siphon from continuing, thus effectively ensuring the normal liquid level in the absorption tower. 5. The liquid sealing device is composed of components such as springs, plates and flanges. It has a simple structure, is easy to maintain, eliminates the need for a bulky liquid sealing tank, has low investment, and is not prone to scaling and clogging.

[0036] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the scope of protection of the present invention.

Claims

1. A simple anti-clogging overflow device for a wet desulfurization absorption tower, characterized in that: The system includes an absorption tower (1), an overflow pipe (2), a gas sealing device (3), an overflow riser (4), a liquid sealing device (5), and a process water pipe (11). The absorption tower (1) is connected to the overflow pipe (2), the overflow pipe (2) is connected to the overflow riser (4) via a flange, the upper end of the overflow riser (4) is connected to the gas sealing device (3) via a flange, the lower end of the overflow riser (4) is connected to the liquid sealing device (5) via a flange, and the process water pipe (11) is connected to the overflow riser (4) via a flange cover. The overflow pipe (2) is positioned higher than the normal liquid level of the absorption tower (1).

2. The simple anti-clogging overflow device for a wet desulfurization absorption tower as described in claim 1, characterized in that: The overflow riser (4) is equipped with an air-sealed maintenance valve (6) and a liquid-sealed maintenance valve (7), which are respectively located near the air-sealing device (3) and the liquid-sealing device (5).

3. The simple anti-clogging overflow device for a wet desulfurization absorption tower as described in claim 1, characterized in that: The overflow pipe (2) is directly welded and fixed to the absorption tower (1). The angle α between the center of the overflow pipe (2) and the horizontal is 5°~25°. The position of the overflow pipe (2) is 0.5~1m higher than the normal liquid level of the absorption tower (1).

4. The simple anti-clogging overflow device for a wet desulfurization absorption tower as described in claim 1, characterized in that: The process water pipe (11) is provided with two nozzles (10), which are respectively facing the overflow pipe (2) and the liquid seal device (5). The spray angle of the nozzle (10) is 50°~120°. The center of the overflow pipe (2) corresponds to the center of the corresponding nozzle (10). The nozzle (10) facing the liquid seal device (5) is located at the center of the overflow riser (4).

5. The simple anti-clogging overflow device for a wet desulfurization absorption tower as described in claim 1, characterized in that: The air-sealing device (3) includes an air-sealing connector (30), an air-sealing adjusting bolt (31), an air-sealing fixed cover plate (32), an air-sealing movable cover plate (33), an air-sealing support plate (34), an air-sealing spring (35), an air-sealing boss ring plate (36), an air-sealing plate (37), an air inlet slot (38), and an air-sealing sealing ring (39). The upper end of the air-sealing connector (30) is provided with an air-sealing fixed cover plate (32). An air-sealing adjusting bolt (31) threadedly connects to the air-sealing fixed cover plate (32). The air-sealing movable cover plate (33) and the air-sealing support plate (34) have a central hole with a diameter slightly larger than that of the air-sealing adjusting bolt (31). The adjusting bolt (31) passes through the openings on the air seal movable cover plate (33) and the air seal support plate (34), and an anti-detachment ring is provided at the tail of the air seal adjusting bolt (31). The air seal boss ring plate (36) is fixed on the inner wall of the air seal pipe (30). The air seal plate (37) is set below the air seal boss ring plate (36). The air seal sealing ring (39) is located between the air seal plate (37) and the air seal boss ring plate (36) and is fixed on the air seal boss ring plate (36). The two ends of the air seal spring (35) are fixedly connected to the air seal plate (37) and the air seal movable cover plate (33) respectively. The circumferential surface of the air seal pipe (30) is provided with several air inlet slots (38).

6. The simple anti-clogging overflow device for a wet desulfurization absorption tower as described in claim 5, characterized in that: The total area of ​​the air inlet slot (38) is greater than the cross-sectional area of ​​the air seal connector (30).

7. The simple anti-clogging overflow device for a wet desulfurization absorption tower as described in claim 5, characterized in that: The aperture of the gas-sealing boss ring plate (36) is 10-20 mm smaller than the inner diameter of the gas-sealing pipe (30).

8. The simple anti-clogging overflow device for a wet desulfurization absorption tower as described in claim 1, characterized in that: The liquid sealing device (5) includes a liquid sealing tube (50), a liquid sealing adjusting bolt (51), a liquid sealing fixing cover plate (52), a liquid sealing movable cover plate (53), a liquid sealing support plate (54), a liquid sealing spring (55), a liquid sealing boss ring plate (56), a liquid sealing plate (57), a drain groove hole (58), and a liquid sealing ring (59). The lower end of the liquid sealing tube (50) is provided with a liquid sealing fixing cover plate (52), and a liquid sealing adjusting bolt (51) threadedly connected to the liquid sealing fixing cover plate (52) is provided on the liquid sealing fixing cover plate (52). The upper end of the liquid sealing adjusting bolt (51) is provided with a liquid sealing support plate (54). The liquid seal support plate (54) is directly abutted against the lower end of the liquid seal movable cover plate (53). The liquid seal boss ring plate (56) is fixed to the inner wall of the liquid seal mounting tube (50). The liquid seal plate (57) is set below the liquid seal boss ring plate (56). The liquid seal sealing ring (59) is located between the liquid seal plate (57) and the liquid seal boss ring plate (56) and is fixed on the liquid seal boss ring plate (56). The two ends of the liquid seal spring (55) are fixedly connected to the liquid seal plate (57) and the liquid seal movable cover plate (53) respectively. The circumferential surface of the liquid seal mounting tube (50) is provided with several drainage groove holes (58).

9. The simple anti-clogging overflow device for a wet desulfurization absorption tower as described in claim 8, characterized in that: The aperture of the liquid seal boss ring plate (56) is 10-20 mm smaller than the inner diameter of the liquid seal connector (50), and the total area of ​​the drain groove hole (58) is greater than the cross-sectional area of ​​the liquid seal pipe (50).

10. A simple anti-clogging overflow device for a wet desulfurization absorption tower as described in any one of claims 1 to 9, characterized in that: The diameter of the overflow pipe (2) and the overflow riser (4) is DN200~DN250.

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