Packing layer for fully mixing gas and liquid in acid-alkali washing tower

Abstract

The invention discloses a packing layer for fully mixing gas and liquid in an acid-base washing tower, which is characterized in that washing liquid is injected from bottom to top, so that the washing liquid is gathered above the packing layer to form gathering and accumulation of the washing liquid, and at the moment, waste gas flowing upwards under the pushing of high pressure passes through the packing layer and then enters the gathered washing liquid above; the waste gas is in contact with the washing liquid in quantity to obtain an efficient washing effect, and impurities in the waste gas are blocked by the washing liquid in quantity and are discharged along with the washing liquid flowing downwards at the moment and penetrating through the filler layer, so that the overall waste gas washing effect is improved. Meanwhile, the accumulated washing liquid penetrates through the filler layer to flow downwards, due to the porous structure of the filler layer, the washing liquid flowing out of the filler layer is diffused, and the waste gas flowing upwards firstly penetrates through the diffused washing liquid to be washed for the first time and then enters the filler layer to be washed for the second time; and then three times of washing are carried out above the filler layer, so that the overall washing effect of the washing tower is improved.

Description

Technical Field

[0001] The present application relates to the field of environmental protection technology, and in particular to a packing layer for fully mixing gas and liquid in an acid-base washing tower. Background Art

[0002] An acid-base washing tower is an industrial device that introduces high-pressure industrial waste gas from the bottom and sprays washing liquid through a spray device above to purify the waste gas flowing upward. During the washing process, existing washing towers generally have multiple groups of spray pipes and a packing layer under the spray pipe to increase the contact between the washing liquid and the waste gas and improve the washing effect.

[0003] This setting requires multiple groups of spray pipes to form a large-scale spray coverage in order to contact a large area of ​​the fast-flowing high-pressure exhaust gas. This will undoubtedly waste a lot of washing liquid, and the impurities entrained in the high-pressure exhaust gas will also be carried away by the washing liquid and fall into the packing layer below. Since the packing layer is a porous structure, impurities can easily accumulate in the packing layer after long-term operation, causing blockage of the packing layer. At this time, the machine needs to be shut down, affecting the overall washing efficiency. Summary of the invention

[0004] The present application proposes a packing layer for fully mixing gas and liquid in an acid-base washing tower, which has the advantages of upward surging washing liquid forming a washing pool above the packing layer, the washing liquid downwardly passing through the packing layer and fully contacting the upward exhaust gas, the packing layer scatters the washing liquid to contact the upward exhaust gas, the exhaust gas ascends into the washing pool for efficient washing, the washing liquid in the washing pool accumulates and impacts the inner packing, causing the inner packing to move and break up the adhesion of impurities, the flowing washing liquid carries away the impurities in the inner packing, the blocked packing layer causes the washing liquid level in the washing pool to continue to rise, the washing liquid enters the regulating chamber to close the fixed plate and increase the air pressure, and is used to solve the problems of the existing washing tower having a large number of spray pipes, low washing efficiency and impurities blocking the packing layer.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a packing layer for fully mixing gas and liquid in an acid-base washing tower, comprising a washing tower, wherein an air inlet and a liquid discharge port are arranged at the bottom of the washing tower for inputting high-pressure exhaust gas and discharging waste liquid; uniformly distributed support protrusions are arranged in the middle of the inner cavity of the washing tower, and a liquid distribution pipe is arranged on the support protrusion, and uniformly distributed surge pipes are arranged at the top of the liquid distribution pipe, and a liquid inlet pipe is arranged at the bottom of the liquid distribution pipe for outputting washing liquid upward; a packing layer is arranged at the top of the liquid distribution pipe, and the top of the surge pipe is located at the top of the packing layer, which is used to accumulate washing 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 an inner packing that is movable and evenly distributed inside. The bottom end of the positioning frame is provided with a mesh plate with large pores for limiting the range of movement of the inner packing. There is a gap between the side wall of the inner packing and the inner wall of the limiting ring and the positioning frame for providing space for the inner packing to move.

[0007] Preferably, a regulating chamber is provided on the outer side wall of the washing tower, a longitudinal liquid collecting chamber is opened in the regulating chamber, and a bearing plate is provided in the liquid collecting chamber.

[0008] Preferably, a connecting port is provided at the top of the washing tower and connected to the top of the liquid collecting chamber for inputting washing liquid into the liquid collecting chamber. A drain pipe is provided in the regulating chamber, and the top end of the drain pipe passes through the bearing plate to the top end of the bearing plate for outputting the washing liquid in the liquid collecting chamber.

[0009] Preferably, the cross-sectional area of ​​the pipe opening of the drainage pipe is smaller than the cross-sectional area of ​​the connecting port, so as to gather the washing liquid in the liquid gathering chamber.

[0010] Preferably, a fixed plate is provided at the top of the inner cavity of the washing tower, and exhaust holes I uniformly distributed vertically penetrating thereon are opened on the fixed plate. A movable cavity is opened in the fixed plate, and a movable plate is movably sleeved in the movable cavity. The movable plate is provided with exhaust holes II uniformly distributed vertically penetrating thereon for discharging the washed waste gas.

[0011] Preferably, a pull rope is provided at one end of the movable plate close to the regulating chamber, and the other end of the pull rope movably passes through the fixed plate and is connected to the top end of the bearing plate, so as to transmit the force when the movable plate and the bearing plate move.

[0012] Preferably, a reset spring is provided between a side wall at one end of the movable plate and a side wall of the movable cavity, for driving the movable plate and the load-bearing plate to reset.

[0013] The present application provides a packing layer for fully mixing gas and liquid in an acid-base washing tower. By gushing out washing liquid from bottom to top, the washing liquid is gathered above the packing layer to form a concentrated accumulation of washing liquid. At this time, the exhaust gas flowing upward under the push of high pressure will pass through the packing layer and then enter the washing liquid gathered above. The exhaust gas will contact the washing liquid in large quantities to obtain an efficient washing effect, and the impurities in the exhaust gas will also be blocked by the washing liquid in large quantities, and will be discharged along with the washing liquid flowing downward through the packing layer at this time, thereby improving the overall exhaust gas washing 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. At this time, the exhaust gas flowing upward will first pass through these diffused washing liquids for a wash, then enter the packing layer for a second wash, and then be washed a third time above the packing layer, thereby improving the overall washing effect of the washing tower.

[0015] At the same time, 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, resulting in a weakened flow capacity of the packing layer, making the amount of washing liquid gushing out of the surge pipe much greater than the amount of washing liquid discharged by the packing layer, causing the washing liquid level above the packing layer to continue to rise, causing the accumulated washing liquid with increased hydraulic pressure to squeeze the inner packing, causing the inner packing to move and the spacing between adjacent inner packings to expand or compress, thereby causing the adhered impurities to loosen and be washed away by the washing liquid in the process of increasing or decreasing the gap between the inner packings.

[0016] At the same time, when the liquid level is higher than the connecting port, the washing liquid will flow into the liquid collecting chamber, and the washing liquid accumulated in the liquid collecting chamber will squeeze the load-bearing plate downward, so that the load-bearing plate presses down to pull the pull rope and drives the movable plate to move to block the exhaust hole Ⅰ on the fixed plate, causing the upward-flowing exhaust gas to accumulate between the packing layer and the fixed plate to gradually form a high-pressure environment. With the rising liquid level of the washing liquid, the impurities in the packing layer are squeezed downward to further improve the automatic cleaning effect of the impurities. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which: Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the internal structure distribution of the present invention; Figure 3 It is a schematic diagram of the structural position of the movable plate of the present invention; Figure 4 For the present invention Figure 3 A partial enlarged schematic diagram of the structure at center A; Figure 5 It is a schematic diagram of the packing layer structure of the present invention.

[0019] Wherein: 1. washing tower; 2. air inlet; 3. liquid discharge port; 4. supporting protrusion; 5. liquid distribution pipeline; 6. liquid inlet pipe; 7. surge pipe; 8. packing layer; 81. limit ring; 82. positioning frame; 83. inner packing; 9. regulating chamber; 10. liquid collecting cavity; 11. bearing plate; 12. liquid discharge pipe; 13. connecting port; 14. pull rope; 15. fixed plate; 151. movable cavity; 16. exhaust hole I; 17. movable plate; 18. exhaust hole II; 19. reset spring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. Embodiment 1

[0021] See also Figures 1 to 3 A packing layer for fully mixing gas and liquid in an acid-base washing tower comprises a washing tower 1, the bottom of the washing tower 1 is welded with an air inlet 2 and a liquid discharge port 3, so that high-pressure exhaust gas can be input into the bottom of the washing tower 1 through the air inlet 2, and then flow upward for washing operation, and the washing liquid falling from the top can be discharged through the liquid discharge port 3, and a circumferentially uniformly distributed supporting protrusion 4 is welded on the side wall of the middle part of the inner cavity of the washing tower 1, and a liquid distribution pipeline 5 is fixedly connected to the supporting protrusion 4, and a circumferentially uniformly distributed surge pipe 7 is arranged on the top of the liquid distribution pipeline 5, and a liquid inlet pipe 6 is bolted to the bottom end of the liquid distribution pipeline 5, so that the liquid distribution pipeline 5 is fixed in position under the support of the supporting protrusion 4, and the washing liquid can continuously enter the liquid distribution pipeline 5 through the liquid inlet pipe 6, and then continuously surge upward through the surge pipe 7, and is input into the washing tower to wash the contacted exhaust gas.

[0022] See also Figures 2 to 3, the top of the liquid distribution pipe 5 is fixedly connected with a packing layer 8, and the top of the surging pipe 7 penetrates the packing layer 8 from bottom to top to the top of the packing layer 8, and the side wall of the packing layer 8 fits with the inner cavity wall of the washing tower 1, so that the position of the packing layer 8 is fixed, and the washing liquid surging upward from the surging pipe 7 can reach the top of the packing layer 8. At this time, the washing liquid above the packing layer 8 will flow downward through the gap in the packing layer 8, and efficiently contact with the gas flowing upward in the gap of the packing layer 8 to perform a washing effect. At the same time, the porous structure of the packing layer 8 makes the washing liquid flowing out of the packing layer 8 diffuse. At this time, the exhaust gas flowing upward will first pass through After the diffused washing liquid is washed once, it enters the packing layer 8 and performs reverse high-efficiency contact washing. The liquid output per unit time of the surging tube 7 is greater than the liquid discharge per unit time of the packing layer 8, so that a large amount of washing liquid is accumulated above the packing layer 8, forming a liquid accumulation state similar to a washing pool, which enables the waste gas that has been washed twice through the pores of the packing layer 8 to enter the washing liquid accumulated above the packing layer 8, and gradually move upward, fully contact the washing liquid, and perform an efficient third washing, further improving the washing effect. At this time, a large amount of impurities washed out by the washing liquid will follow the washing liquid to flow downward through the packing layer 8. Embodiment 2

[0023] See also Figure 2 , Figure 5 On the basis of the first embodiment, 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 a plurality of inner packings 83 on the inner side. The side walls of the limiting ring 81 and the positioning frame 82 are welded to the inner cavity wall of the washing tower 1, so as to limit the movable space of the inner packing 83 and restrict the washing liquid and the exhaust gas to pass only through the inner packing 83. A mesh plate with large pores is welded to the bottom end of the positioning frame 82 to limit the position of the inner packing 83. The inner packing 83 is movably sleeved in the limiting ring 81 and the positioning frame 82, and 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. 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, resulting in a weakened flow capacity of the packing layer 8, so that the amount of washing liquid gushing out of the surge pipe 7 is much greater than the amount of washing liquid discharged by the packing layer 8, resulting in the continuous rise of the washing liquid level above the packing layer 8, so that the accumulated washing liquid with increased hydraulic pressure squeezes the inner packing 83, causing the inner packing 83 to move in position and the spacing between adjacent inner packings 83 to expand or compress, so that in the process of increasing or decreasing the gap between the inner packings 83, the adhered impurities are loosened and washed away by the washing liquid. Embodiment 3

[0024] See also Figures 2 to 4On the basis of the second embodiment, a regulating chamber 9 is welded on the outer wall of the washing tower 1, and a longitudinal liquid collecting chamber 10 is opened in the regulating chamber 9. A bearing plate 11 is movably sleeved in the liquid collecting chamber 10, and a drainage pipe 12 is movably sleeved in the regulating chamber 9. The top of the drainage pipe 12 penetrates the bearing plate 11 to the top of the bearing plate 11. A connecting port 13 is opened on the top of the washing tower 1 and is connected to the top of the liquid collecting chamber 10, so that when the blockage of the packing layer 8 causes the liquid level of the upper washing liquid to be higher than the connecting port 13, the washing liquid will flow into the liquid collecting chamber 10, and the cross-sectional area of ​​the pipe mouth of the drainage pipe 12 is smaller than the cross-sectional area of ​​the connecting port 13, so that the amount of washing liquid entering the liquid collecting chamber 10 is greater than the amount of washing liquid discharged by the drainage pipe 12, which causes the washing liquid in the liquid collecting chamber 10 to gradually increase, the liquid level gradually increases, and the hydraulic pressure continues to increase, so that the washing liquid accumulated in the liquid collecting chamber 10 will squeeze the bearing plate 11 downward.

[0025] See also Figures 2 to 4 A fixed plate 15 is bolted to the top of the inner cavity of the washing tower, and the fixed plate 15 is provided with uniformly distributed exhaust holes Ⅰ16 that penetrate upward and downward. A movable cavity 151 is provided in the fixed plate 15, and a movable plate 17 is movably sleeved in the movable cavity 151. The movable plate 17 is provided with uniformly distributed exhaust holes Ⅱ18 that penetrate upward and downward. Under normal conditions, the exhaust holes Ⅱ18 overlap with the exhaust holes Ⅰ16. At this time, the exhaust gas that flows upward and passes through three washes can be discharged from the washing tower 1. The movable plate 17 is fixed at one end close to the regulating chamber 9. A pull rope 14 is connected, and the other end of the pull rope 14 is movably passed through the fixed plate 15 and fixedly connected to the top of the bearing plate 11, so that the bearing plate 11 pulls the pull rope 14 during the downward pressure process to drive the movable plate 17 to move and block the exhaust hole Ⅰ16 on the fixed plate 15, causing the upward flowing exhaust gas to accumulate between the packing layer 8 and the fixed plate 15 to gradually form a high-pressure environment, and cooperate with the washing liquid with the continuously rising liquid level to squeeze and impact the impurities in the packing layer 8 downward, and squeeze the inner packing 83, further improving the exhaust gas. The gap between adjacent inner fillers 83 is increased (the gap between a part of the inner fillers 83 is increased, and the gap between the inner fillers 83 with increased gaps 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 the side wall of one end of the movable plate 17, and the other end of the return spring 19 is fixedly connected to the side wall of the movable chamber 151. After the impurities in the packing layer 8 are cleaned, the common liquid output of the packing layer 8 and the drainage 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 input into the liquid collecting chamber 10 is less than the discharge amount of the drainage pipe 12, the washing liquid in the liquid collecting chamber 10 will continue to decrease, and the downward pressure on the bearing plate 11 will be weakened. 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 bearing plate 11 up and reset by pulling the rope, waiting for the next cleaning action.

Claims

1. A packing layer for gas-liquid mixing in an acid-base scrubbing tower, characterized in that: It comprises a washing tower (1), wherein the bottom of the washing tower (1) 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) is provided with uniformly distributed supporting protrusions (4) in the middle of the inner cavity, and a liquid distribution pipe (5) is provided on the supporting protrusion (4). The top of the liquid distribution pipe (5) is provided with uniformly distributed surge pipes (7), and the bottom of the liquid distribution pipe (5) is provided with a liquid inlet pipe (6) for outputting washing liquid upwards; A packing layer (8) is provided at the top end of the liquid distribution pipe (5), and the top end of the surge pipe (7) is located at the top end of the packing layer (8) for accumulating washing liquid above the packing layer (8).

2. The packing layer for gas-liquid mixing in an acid-base scrubbing tower according to claim 1, characterized in that: The packing layer (8) comprises 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 and movable inside. A mesh plate with holes is provided at the bottom end of the positioning frame (82) for limiting the range of motion of the inner packing (83). A gap exists between the side wall of the inner packing (83) and the limiting ring (81) and the inner wall of the positioning frame (82) for providing a space for the inner packing (83) to move.

3. The packing layer for gas-liquid mixing in an acid-base scrubbing tower according to claim 2, characterized in that: The outer wall of the washing tower (1) is provided with a regulating chamber (9), a longitudinal liquid collecting chamber (10) is provided in the regulating chamber (9), and a load-bearing plate (11) is provided in the liquid collecting chamber (10).

4. The packing layer for gas-liquid mixing in an acid-base scrubbing tower according to claim 3, characterized in that: The top of the washing tower (1) is provided with a connecting port (13) which is connected to the top of the liquid collecting chamber (10) and is used to input washing liquid into the liquid collecting chamber (10). The regulating chamber (9) is provided with a liquid discharge pipe (12). The top end of the liquid discharge pipe (12) passes through the bearing plate (11) to the top end of the bearing plate (11) and is used to output the washing liquid in the liquid collecting chamber (10).

5. The packing layer for gas-liquid thorough mixing in an acid-base scrubbing tower according to claim 4, characterized in that: The cross-sectional area of ​​the pipe opening of the liquid discharge pipe (12) is smaller than the cross-sectional area of ​​the communication opening (13), and is used for collecting the washing liquid in the liquid collecting chamber (10).

6. A packing layer for gas-liquid thorough mixing in an acid-base scrubbing tower according to claim 5, characterized in that: A fixed plate (15) is provided at the top of the inner cavity of the washing tower (1), and exhaust holes I (16) are evenly distributed and penetrated from top to bottom on the fixed plate (15). A movable cavity (151) is provided in the fixed plate (15), and a movable plate (17) is movably sleeved in the movable cavity (151), and exhaust holes II (18) are evenly distributed and penetrated from top to bottom on the movable plate (17) for discharging the washed waste gas.

7. A packing layer for gas-liquid mixing in an acid-base scrubbing tower according to claim 6, characterized in that: A pull rope (14) is provided at one end of the movable plate (17) close to the regulating chamber (9), and the other end of the pull rope (14) movably passes through the fixed plate (15) and is connected to the top end of the load-bearing plate (11) for transmitting the force when the movable plate (17) and the load-bearing plate (11) move.

8. The packing layer for gas-liquid thorough mixing in an acid-base scrubbing tower according to claim 7, characterized in that: A return spring (19) is provided between a side wall at one end of the movable plate (17) and a side wall of the movable cavity (151), and is used to drive the movable plate (17) and the bearing plate (11) to return to their original position.

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