A packing layer for thorough gas-liquid mixing in an acid-base scrubbing tower

Abstract

This application discloses a packing layer for thorough gas-liquid mixing in an acid-base scrubbing tower. Scrubbing liquid flows upwards from the bottom, accumulating above the packing layer. Under high pressure, upward-flowing waste gas passes through the packing layer and enters the accumulated scrubbing liquid above. The waste gas undergoes extensive contact with the scrubbing liquid, achieving a highly efficient scrubbing effect. Impurities in the waste gas are also largely trapped by the scrubbing liquid and discharged along with the downward-flowing scrubbing liquid, thus improving the overall waste gas scrubbing effect. Simultaneously, the accumulated scrubbing liquid flows downwards through the packing layer. Due to the porous structure of the packing layer, the scrubbing liquid flowing out from the packing layer diffuses. The upward-flowing waste gas first undergoes primary scrubbing through this diffused scrubbing liquid, then secondary scrubbing in the packing layer, and finally tertiary scrubbing above the packing layer, further enhancing the overall scrubbing effect of the scrubbing tower.

Description

Technical Field

[0001] This application relates to the field of environmental protection technology, and in particular to a packing layer for thorough gas-liquid mixing in an acid-base scrubbing tower. Background Technology

[0002] An acid-base scrubbing tower is an industrial device that purifies upward-flowing waste gas by introducing high-pressure industrial waste gas from the bottom and spraying washing liquid through a spraying device at the top. During the scrubbing process, existing scrubbing towers are generally equipped with multiple sets of spray pipes and a packing layer below the spray pipes to increase the contact between the washing liquid and the waste gas and improve the scrubbing effect.

[0003] This setup requires multiple spray pipes to form a wide spray coverage to ensure extensive contact with the rapidly rising high-pressure exhaust gas. This undoubtedly wastes a large amount of washing liquid. Furthermore, impurities carried in the high-pressure exhaust gas are also carried away by the washing liquid and fall into the packing layer below. Since the packing layer has a porous structure, impurities can easily accumulate in the packing layer over a long period of operation, leading to blockage. In this case, the machine needs to be shut down, affecting the overall washing efficiency. Summary of the Invention

[0004] This application proposes a packing layer for thorough gas-liquid mixing in an acid-base scrubbing tower. The packing layer features an upward-flowing scrubbing liquid forming a scrubbing pool above it. The scrubbing liquid then flows downwards through the packing layer, making full contact with the upward-flowing waste gas. The packing layer disperses the scrubbing liquid, which then enters the scrubbing pool for efficient scrubbing. The accumulated scrubbing liquid in the pool impacts the inner packing, causing it to move and break up adhering impurities. The flowing scrubbing liquid carries away impurities from the inner packing. Blockage in the packing layer causes the scrubbing liquid level in the scrubbing pool to rise continuously. The scrubbing liquid enters the regulating chamber and closes the fixed plate, increasing the gas pressure. This design addresses the problems of numerous spray pipes, low scrubbing efficiency, and impurity blockage in existing scrubbing towers.

[0005] To achieve the above objectives, this application adopts the following technical solution: a packing layer for thorough gas-liquid mixing in an acid-base scrubbing tower, comprising a scrubbing tower, wherein the bottom of the scrubbing tower is provided with an air inlet and a liquid outlet for inputting high-pressure waste gas and discharging waste liquid; the inner cavity of the scrubbing tower is provided with evenly distributed support protrusions, and a liquid distribution pipe is provided on the support protrusions; the top of the liquid distribution pipe is provided with evenly distributed surging pipes, and the bottom of the liquid distribution pipe is provided with a liquid inlet pipe for outputting scrubbing liquid upwards; a packing layer is provided at the top of the liquid distribution pipe, and the top of the surging pipe is located at the top of the packing layer for accumulating scrubbing liquid above the packing layer.

[0006] Preferably, the packing layer includes a limiting ring at the top of the outer side, a positioning frame at the bottom of the outer side, and inner packing material that is evenly distributed on the inner side. The bottom end of the positioning frame is provided with a mesh plate with large pores to limit the range of motion of the inner packing material. There is a gap between the side wall of the inner packing material and the inner wall of the limiting ring and the positioning frame to provide space for the inner packing material to move.

[0007] Preferably, an adjustment chamber is provided on the outer wall of the washing tower, and a longitudinal liquid collection chamber is provided in the adjustment chamber, and a load-bearing plate is provided in the liquid collection chamber.

[0008] Preferably, the top of the washing tower is provided with a connecting port that connects to the top of the liquid collection chamber for inputting washing liquid into the liquid collection chamber. The regulating chamber is provided with a drain pipe, the top end of which passes through the support plate to the top end of the support plate for outputting the washing liquid in the liquid collection chamber.

[0009] Preferably, the cross-sectional area of ​​the drain pipe opening is smaller than the cross-sectional area of ​​the connecting opening, for the accumulation of washing liquid in the liquid collection chamber.

[0010] Preferably, the top of the inner cavity of the washing tower is provided with a fixed plate, and the fixed plate has evenly distributed vertically penetrating exhaust holes I. The fixed plate has a movable cavity, and a movable plate is movably sleeved in the movable cavity. The movable plate has evenly distributed vertically penetrating exhaust holes II for discharging the waste gas after washing.

[0011] Preferably, a pull rope is provided at one end of the movable plate near the adjustment chamber, and the other end of the pull rope is movably connected to the top of the fixed plate and the load-bearing plate to transmit the force when the movable plate and the load-bearing plate move.

[0012] Preferably, a return spring is provided between one end sidewall of the movable plate and the sidewall of the movable cavity to drive the movable plate and the load-bearing plate to return to their original positions.

[0013] This application provides a packing layer for thorough gas-liquid mixing in an acid-base scrubbing tower. The scrubbing liquid flows upwards from the bottom, accumulating above the packing layer. Under high pressure, the upward-flowing exhaust gas passes through the packing layer and enters the accumulated scrubbing liquid above. The exhaust gas comes into extensive contact with the scrubbing liquid, achieving a highly efficient scrubbing effect. Furthermore, impurities in the exhaust gas are largely blocked by the scrubbing liquid and discharged along with the downward-flowing scrubbing liquid through the packing layer, thereby improving the overall exhaust gas scrubbing effect.

[0014] At the same time, the accumulated washing liquid will flow downward through the packing layer. Due to the porous structure of the packing layer, the washing liquid flowing out of the packing layer is diffused. The upward-flowing exhaust gas will first pass through these diffused washing liquids for a first wash, then enter the packing layer for a second wash, and then undergo a third wash above the packing layer, thereby improving the overall washing effect of the washing tower.

[0015] Meanwhile, as the washing time increases, more and more impurities will be blocked. At this time, the impurities attached to the packing layer will gradually increase, which will weaken the passage capacity of the packing layer. This will cause the amount of washing liquid flowing out of the surging pipe to be much greater than the amount of washing liquid discharged from the packing layer. As a result, the washing liquid level above the packing layer will continue to rise. This will cause the accumulated washing liquid with increased hydraulic pressure to squeeze the inner packing, resulting in the inner packing moving and the gap between adjacent inner packings expanding or compressing. In the process of increasing or decreasing the gap between the inner packings, the attached impurities will loosen and be washed away by the washing liquid.

[0016] Meanwhile, when the liquid level is higher than the connecting port, the washing liquid will rush into the liquid collection chamber. The washing liquid accumulated in the liquid collection chamber will squeeze the support plate downward, causing the support plate to pull the rope and move the movable plate to block the exhaust hole I on the fixed plate. This causes the upward-flowing exhaust gas to accumulate between the packing layer and the fixed plate, gradually forming a high-pressure environment. Combined with the continuously rising liquid level of the washing liquid, it squeezes and impacts the impurities in the packing layer downward, further improving the automatic cleaning effect of impurities. Attached Figure Description

[0017] The accompanying drawings, which form part of this specification, illustrate embodiments disclosed in this application and, together with the specification, serve to explain the principles disclosed in this application.

[0018] This disclosure will become clearer with reference to the accompanying drawings and the following detailed description, wherein:

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0021] Figure 3 This is a schematic diagram showing the position of the movable plate structure of the present invention;

[0022] Figure 4 For the present invention Figure 3 Enlarged view of a portion of the structure at point A;

[0023] Figure 5 This is a schematic diagram of the filler layer structure of the present invention.

[0024] The components are as follows: 1. Scrubber; 2. Air inlet; 3. Drain outlet; 4. Support protrusion; 5. Liquid distribution pipe; 6. Liquid inlet pipe; 7. Surge pipe; 8. Packing layer; 81. Limiting ring; 82. Positioning frame; 83. Internal packing; 9. Adjustment chamber; 10. Liquid collection chamber; 11. Support plate; 12. Drain pipe; 13. Connecting port; 14. Pull rope; 15. Fixing plate; 151. Movable chamber; 16. Exhaust port I; 17. Movable plate; 18. Exhaust port II; 19. Return spring. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. Example 1

[0026] Please see Figures 1 to 3 A packing layer for thorough gas-liquid mixing in an acid-base scrubbing tower includes a scrubbing tower 1. The bottom of the scrubbing tower 1 is welded with an air inlet 2 and a liquid outlet 3, allowing high-pressure waste gas to enter the bottom of the scrubbing tower 1 through the air inlet 2 and then flow upwards for scrubbing. The scrubbing liquid falling from above can be discharged through the liquid outlet 3. Circumferentially distributed support protrusions 4 are welded to the side wall of the inner cavity of the scrubbing tower 1. A liquid distribution pipe 5 is fixedly connected to the support protrusions 4. A circumferentially distributed surging pipe 7 is located at the top of the liquid distribution pipe 5. An inlet pipe 6 is bolted to the bottom of the liquid distribution pipe 5, allowing the liquid distribution pipe 5 to be fixed in position under the support of the support protrusions 4. The scrubbing liquid continuously enters the liquid distribution pipe 5 through the inlet pipe 6 and then continuously flows upwards through the surging pipe 7, entering the scrubbing tower to scrub the waste gas it contacts.

[0027] See Figures 2 to 3A packing layer 8 is fixedly connected to the top of the liquid distribution pipe 5. The top of the surging pipe 7 extends from bottom to top through the packing layer 8 to its top. The sidewall of the packing layer 8 is fitted against the inner wall of the scrubbing tower 1, thus fixing the position of the packing layer 8. The scrubbing liquid surging upward from the surging pipe 7 can reach the top of the packing layer 8. At this time, the scrubbing liquid above the packing layer 8 will flow downward through the gaps in the packing layer 8, making efficient contact with the upward-flowing gas in the gaps of the packing layer 8 for scrubbing. At the same time, the porous structure of the packing layer 8 causes the scrubbing liquid flowing out of the packing layer 8 to diffuse. At this time, the upward-flowing exhaust gas will first pass through the gaps in the packing layer 8 for scrubbing. After the diffused washing liquid undergoes a first wash, it enters the packing layer 8 for a counter-current high-efficiency contact wash. The liquid output of the surging pipe 7 per unit time is greater than the liquid discharge of the packing layer 8 per unit time, causing a large amount of washing liquid to accumulate above the packing layer 8, forming a liquid accumulation state similar to a washing pool. This allows the exhaust gas that has undergone secondary washing through the pores of the packing layer 8 to enter the washing liquid accumulated above the packing layer 8 and gradually move upwards, fully contacting the washing liquid for a highly efficient third wash, further improving the washing effect. At this time, a large amount of impurities washed out by the washing liquid will flow downwards with the washing liquid through the packing layer 8. Example 2

[0028] Please see Figure 2 , Figure 5 Based on Embodiment 1, the packing layer 8 includes a limiting ring 81 at the top of the outer side, a positioning frame 82 at the bottom of the outer side, and multiple inner packings 83 on the inner side. The sidewalls of the limiting ring 81 and the positioning frame 82 are welded to the inner wall of the scrubbing tower 1 to restrict the movement space of the inner packings 83 and restrict the scrubbing liquid and exhaust gas to pass only through the inner packings 83. A mesh plate with large pores is welded to the bottom end of the positioning frame 82 to restrict the position of the inner packings 83. The inner packings 83 are movably sleeved within the limiting ring 81 and the positioning frame 82, and there is a gap between the sidewall of the inner packings 83 and the inner wall of the limiting ring 81 and the positioning frame 82. As the washing time increases, more and more impurities will be blocked. At this time, the impurities attached to the packing layer 8 will gradually increase, which will weaken the passage capacity of the packing layer 8. This will cause the amount of washing liquid flowing out of the surging pipe 7 to be much greater than the amount of washing liquid discharged from the packing layer 8. As a result, the washing liquid level above the packing layer 8 will continue to rise. This will cause the accumulated washing liquid with increased hydraulic pressure to squeeze the inner packing 83, causing the inner packing 83 to move and the gap between adjacent inner packing 83 to expand or compress. In the process of increasing or decreasing the gap between the inner packing 83, the attached impurities will loosen and be washed away by the washing liquid. Example 3

[0029] Please see Figures 2 to 4Based on Embodiment 2, an regulating chamber 9 is welded to the outer wall of the washing tower 1. A longitudinal liquid collection chamber 10 is provided in the regulating chamber 9. A support plate 11 is movably sleeved in the liquid collection chamber 10. A drain pipe 12 is movably sleeved in the regulating chamber 9. The top end of the drain pipe 12 passes through the support plate 11 to the top end of the support plate 11. A connecting port 13 is provided at the top of the washing tower 1, which is connected to the top of the liquid collection chamber 10. When the blockage of the packing layer 8 causes the liquid level of the washing liquid above to be higher than that of the connecting port 13, the washing liquid will flow into the liquid collection chamber 10. The cross-sectional area of ​​the drain pipe 12 is smaller than that of the connecting port 13, so that the amount of washing liquid entering the liquid collection chamber 10 is greater than the amount of washing liquid discharged from the drain pipe 12. This causes the amount of washing liquid in the liquid collection chamber 10 to gradually increase, the liquid level to gradually increase, and the hydraulic pressure to continuously increase. This causes the washing liquid accumulated in the liquid collection chamber 10 to press down on the support plate 11.

[0030] See Figures 2 to 4 A fixed plate 15 is bolted to the top of the inner cavity of the scrubbing tower. The fixed plate 15 has evenly distributed, vertically penetrating exhaust holes I 16. A movable cavity 151 is formed inside the fixed plate 15, and a movable plate 17 is movably fitted inside the movable cavity 151. The movable plate 17 has evenly distributed, vertically penetrating exhaust holes II 18. Under normal conditions, exhaust holes II 18 coincide with exhaust holes I 16, allowing the upward-flowing waste gas that has undergone three washes to be discharged from the scrubbing tower 1. The end of the movable plate 17 closest to the regulating chamber 9 is fixed. A pull rope 14 is connected, with the other end of the rope 14 movably passing through the top of the fixed plate 15 and the support plate 11. This allows the support plate 11 to pull the rope 14 during downward pressure, causing the movable plate 17 to move and block the exhaust hole I 16 on the fixed plate 15. This results in the upward-flowing exhaust gas accumulating between the packing layer 8 and the fixed plate 15, gradually forming a high-pressure environment. Combined with the continuously rising washing liquid, this environment downwardly squeezes and impacts impurities within the packing layer 8 and further compresses the inner packing 83, further improving... The gap between adjacent inner packing 83 is increased (the gap between some inner packing 83 is increased, and the gap between the inner packing 83 with increased gap will be reduced), which improves the loosening effect of impurities and further improves the automatic cleaning effect of impurities. A return spring 19 is fixedly connected to one side wall of the movable plate 17, and the other end of the return spring 19 is fixedly connected to the side wall of the movable cavity 151. When the impurities in the packing layer 8 are cleaned, the common liquid output of the packing layer 8 and the drain pipe 12 increases. At this time, the washing liquid between the packing layer 8 and the fixed plate 15 gradually decreases, and the liquid level continues to drop. When the liquid level is lower than the connecting port 13 or the amount of liquid entering the liquid collection cavity 10 is less than the discharge amount of the drain pipe 12, the washing liquid in the liquid collection cavity 10 will continue to decrease, and the downward pressure on the support plate 11 will weaken. At this time, because the return spring 19 is compressed when the movable plate 17 moves to close the fixed plate 15, it can push the movable plate 17 to reset, open the fixed plate 15 again, and pull the support plate 11 to lift and reset by pulling the rope, waiting for the next cleaning action.

Claims

1. A packing layer for thorough gas-liquid mixing in an acid-base scrubbing tower, characterized in that, Includes a scrubbing tower (1), the bottom of which is provided with an air inlet (2) and a liquid outlet (3) for inputting high-pressure waste gas and discharging waste liquid; The washing tower (1) has evenly distributed support protrusions (4) in the middle of its inner cavity. A liquid distribution pipe (5) is provided on the support protrusions (4). An evenly distributed surging pipe (7) is provided at the top of the liquid distribution pipe (5). An inlet pipe (6) is provided at the bottom of the liquid distribution pipe (5) for outputting washing liquid upwards. The top end of the liquid distribution pipe (5) is provided with a packing layer (8), and the top end of the surging pipe (7) is located at the top end of the packing layer (8) for accumulating washing liquid above the packing layer (8). An regulating chamber (9) is provided on the outer wall of the washing tower (1). A longitudinal liquid collection chamber (10) is provided in the regulating chamber (9). A support plate (11) is provided in the liquid collection chamber (10). A connecting port (13) is provided at the top of the washing tower (1) to connect with the top of the liquid collection chamber (10) for inputting washing liquid into the liquid collection chamber (10). A drain pipe (12) is provided in the regulating chamber (9). The top end of the drain pipe (12) passes through the support plate (11) to the top end of the support plate (11) for outputting the washing liquid in the liquid collection chamber (10). A fixing plate (15) is provided at the top of the inner cavity of the washing tower (1). The fixed plate (15) is provided with evenly distributed vertically penetrating exhaust holes I (16), and the fixed plate (15) is provided with a movable cavity (151). A movable plate (17) is movably sleeved in the movable cavity (151). The movable plate (17) is provided with evenly distributed vertically penetrating exhaust holes II (18) for discharging the washed exhaust gas. A pull rope (14) is provided at one end of the movable plate (17) near the regulating chamber (9). The other end of the pull rope (14) movably passes through the fixed plate (15) and connects to the top of the load-bearing plate (11) for transmitting the force when the movable plate (17) and the load-bearing plate (11) move.

2. The packing layer for thorough gas-liquid mixing in an acid-base scrubbing tower according to claim 1, characterized in that, The packing layer (8) includes a limiting ring (81) at the top of the outer side, a positioning frame (82) at the bottom of the outer side, and an inner packing (83) that is evenly distributed on the inner side. The bottom end of the positioning frame (82) is provided with a mesh plate with holes to limit the range of motion of the inner packing (83). There is a gap between the side wall of the inner packing (83) and the inner wall of the limiting ring (81) and the positioning frame (82) to provide space for the inner packing (83) to move.

3. The packing layer for thorough gas-liquid mixing in an acid-base scrubbing tower according to claim 2, characterized in that, The cross-sectional area of ​​the drain pipe (12) is smaller than that of the connecting port (13), and is used for the accumulation of washing liquid in the liquid collection chamber (10).

4. The packing layer for thorough gas-liquid mixing in an acid-base scrubbing tower according to claim 3, characterized in that, A reset spring (19) is provided between one end of the movable plate (17) and the side wall of the movable cavity (151) to drive the movable plate (17) and the load-bearing plate (11) to reset.

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