A waste gas treatment device in an acid production process

Abstract

The utility model discloses a kind of waste gas treatment equipment in acid-making process, belong to acid-making waste gas treatment field.The device includes several splashing columns rotationally arranged in scrubbing tower, and splashing ring with trapezoidal cross section is arranged in the splashing column, and the spray head is arranged between adjacent splashing columns, the scrubbing liquid sprayed by the spray head can be directly contacted with the edge of splashing ring, the scrubbing liquid is dispersed under the action of the impact force when being sprayed and the reaction force after impact edge, while splashing column itself can rotate in scrubbing tower, can drive splashing ring rotation, the surface of scrubbing liquid contacted with the edge of splashing ring can transmit force in rotation direction, guide the splashing direction of scrubbing liquid, part of scrubbing liquid after splashing collides in scrubbing tower, path is changed again, receives force in multiple directions during the falling process of scrubbing liquid, collides and splashes constantly, and scrubbing liquid in splashing can be contacted with ascending waste gas and react, reduce the proportion of unreacted scrubbing liquid falling into waste water tank.

Description

Technical Field

[0001] This utility model relates to the field of acid production waste gas treatment, and in particular to a waste gas treatment device in an acid production process. Background Technology

[0002] In acid production processes, commonly used devices for waste gas treatment include integrated acid mist waste gas treatment equipment, acid mist scrubbing towers, acid waste gas purifiers, and acid-base scrubbing towers. Among these, if the acid production process generates emissions with acidic components such as sulfuric acid mist and hydrogen chloride as the main pollutants, acid-base scrubbing towers are generally selected.

[0003] Existing acid-base scrubbing towers typically have a spray system at the top, with exhaust gas flowing upwards. The scrubbing liquid sprayed from the system comes into contact with the exhaust gas, producing a chemical reaction that purifies the gas. However, in acid-base scrubbing towers without a packing layer, the scrubbing liquid falls vertically after being sprayed a certain distance. During this fall, the scrubbing liquid forms water droplets or liquid films due to surface tension. When these water droplets come into contact with the exhaust gas, generally only the outer surface of the water droplets reacts with the exhaust gas, resulting in a reduced surface area of ​​the scrubbing liquid droplets that can contact the exhaust gas. This requires more scrubbing liquid to participate in the purification process, and a large amount of unreacted scrubbing liquid remains in the discharged purified wastewater.

[0004] In summary, in the existing acid-base scrubbing towers without packing layers, water droplets or liquid films are formed when the scrubbing liquid descends, resulting in less scrubbing liquid directly reacting with the waste gas. At the same time, a large amount of unreacted scrubbing liquid is present in the discharged wastewater. Utility Model Content

[0005] This utility model provides a waste gas treatment device for acid production processes, which can solve the problem that in the existing acid and alkali scrubbing towers without packing layers, water droplets or liquid films are formed when the scrubbing liquid descends, resulting in less scrubbing liquid that directly reacts with the waste gas, and at the same time, a large amount of unreacted scrubbing liquid appears in the discharged wastewater.

[0006] A waste gas treatment device for an acid production process includes a scrubbing tower for treating waste gas, wherein a splashing mechanism is provided inside the scrubbing tower, and the splashing mechanism includes: A plurality of splash columns are rotatably arranged inside the washing tower. The plurality of splash columns are spaced apart inside the washing tower. A plurality of splash rings are fixedly connected inside each splash column. The cross-section of the splash rings is trapezoidal. Several nozzles are provided, all of which are inclinedly arranged inside the scrubbing tower. The nozzles are divided into several groups, and each group of nozzles is arranged between adjacent splash columns. The extended line of the centerline of the nozzle intersects with the edge of the splash ring. The washing tower has an air inlet slot and a wastewater slot inside. An arc-shaped block is fixedly connected inside the air inlet slot, and an indented block is provided on the side of the air inlet slot near the arc-shaped slot.

[0007] Optionally, a sealed door is rotatably connected to the surface of the washing tower, and the sealed door is disposed between adjacent splash columns.

[0008] Optionally, a blocking ring is fixedly connected to the surface of the splash ring, the edge of the blocking ring coincides with the edge of the splash ring away from the splash column, and a partition mesh is slidably connected inside the blocking ring.

[0009] Optionally, a plurality of connecting rods are fixedly connected to the surface of the blocking ring, and the plurality of connecting rods are arranged in a ring array on the surface of the splash ring; the cross-section of the connecting rod is an isosceles trapezoid, and the dimension of the connecting rod on the side closer to the splash column is smaller than the dimension on the other side.

[0010] Optionally, a limiting band is slidably connected inside the connecting rod, a limiting spring is fixedly connected between the limiting band and the connecting rod, a limiting post is fixedly connected to the end of the limiting band, and a limiting groove is formed on the side of the connecting rod away from the limiting band, the limiting groove being adapted to the limiting post.

[0011] Optionally, a motor is fixedly connected to the surface of the washing tower, a drive rod is fixedly connected to the end of the motor output shaft, and a drive gear is fixedly connected to the surface of the drive rod; a plurality of driving teeth are fixedly connected to the surface of the splash column, and the plurality of driving teeth are arranged in a ring array on the surface of the splash column, and the driving teeth mesh with the drive gear.

[0012] Optionally, a central gear is rotatably connected inside the washing tower. The central gear meshes with a drive gear and a driving tooth. The tooth profiles of the drive gear and the driving tooth do not intersect in space.

[0013] Optionally, the wastewater tank is fixedly connected with a partition column and a transition column. The partition column and the transition column are fixedly connected. The edge of the partition column coincides with the edge of the air inlet slot. Several through slots are opened on the surface of the partition column.

[0014] Optionally, a push column is rotatably connected to the surface of the transition column, and a through rod is slidably connected inside the push column, the through rod being adapted to the through groove; a connecting spring is fixedly connected between the through rod and the push column.

[0015] Optionally, a pushing gear is fixedly connected to the surface of the pushing column, the pushing gear is rotatably disposed inside the washing tower, and a rotating gear is fixedly connected to the surface of the driving rod, the pushing gear meshing with the rotating gear.

[0016] This invention provides a waste gas treatment device for an acid production process, comprising several splash columns rotatably disposed inside a scrubbing tower, with a trapezoidal splash ring disposed inside each splash column. Inclined nozzles are disposed between adjacent splash columns. The scrubbing liquid sprayed from the nozzles directly contacts the edge of the splash ring. The scrubbing liquid is dispersed by the impact force during spraying and the reaction force after impacting the edge. Simultaneously, since the splash columns themselves can rotate inside the scrubbing tower, they can drive the splash ring to rotate. The surface of the scrubbing liquid in contact with the edge of the splash ring will transmit a force in the direction of rotation, guiding the splash direction of the scrubbing liquid. Some of the splashed scrubbing liquid will collide inside the scrubbing tower, changing the splash path again. As the scrubbing liquid falls, it will be subjected to forces in multiple directions, constantly impacting and splashing, preventing it from forming stable water droplets or a liquid film on the surface. The splashed scrubbing liquid can react with the rising waste gas, thereby reducing the proportion of unreacted scrubbing liquid falling into the wastewater tank. Attached Figure Description

[0017] Figure 1 A schematic diagram of the structure of a waste gas treatment device in an acid production process provided by this utility model; Figure 2 A three-dimensional cross-sectional view of the splash ring provided by this utility model; Figure 3 Provided by this utility model Figure 2 Enlarged view of the local structure at point A; Figure 4 An exploded three-dimensional view of the splash column provided by this utility model.

[0018] Explanation of reference numerals in the attached figures: 1. Scrubber tower; 21. Splash column; 22. Splash ring; 23. Nozzle; 24. Air inlet slot; 25. Wastewater tank; 26. Arc-shaped block; 27. Recessed block; 31. Blocking ring; 32. Partition net; 33. Connecting rod; 34. Limiting band; 35. Limiting post; 41. Motor; 42. Drive rod; 43. Drive gear; 44. Drive gear; 45. Intermediate gear; 51. Partition column; 52. Transition column; 53. Push column; 54. Through rod; 55. Connecting spring; 56. Push gear; 57. Rotating gear. Detailed Implementation

[0019] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0020] like Figures 1 to 4As shown in the figure, an embodiment of the present invention provides a waste gas treatment device in an acid production process, including a scrubbing tower 1 for treating waste gas. The scrubbing tower 1 is internally equipped with a splashing mechanism, which includes: A plurality of splash columns 21 are rotatably arranged inside the washing tower 1. The plurality of splash columns 21 are spaced apart inside the washing tower 1. A plurality of splash rings 22 are fixedly connected inside each splash column 21. The cross-section of the splash rings 22 is trapezoidal. A plurality of nozzles 23 are provided, all of which are inclinedly arranged inside the scrubbing tower 1. The plurality of nozzles 23 are divided into several groups, and each group of nozzles 23 is arranged between adjacent splash columns 21. The extended line of the centerline of the nozzle 23 intersects the edge of the splash ring 22. The washing tower 1 is provided with an air inlet slot 24 and a wastewater slot 25. An arc-shaped block 26 is fixedly connected inside the air inlet slot 24, and an indented block 27 is provided on the side of the air inlet slot 24 near the arc-shaped slot. In summary, the waste gas treatment device in the acid production process provided by this utility model embodiment includes several splash columns 21 rotatably arranged inside the scrubbing tower 1, and a splash ring 22 with a trapezoidal cross-section is arranged inside the splash column 21. An inclined nozzle 23 is arranged between adjacent splash columns 21. The washing liquid sprayed from the nozzle 23 will directly contact the edge of the splash ring 22. The washing liquid will be dispersed under the action of the impact force when it is sprayed and the reaction force after impacting the edge. At the same time, since the splash column 21 itself can rotate inside the scrubbing tower 1, it can drive the splash ring 22 to rotate. The surface of the washing liquid in contact with the edge of the splash ring 22 will transmit the force in the rotation direction, guiding the splash direction of the washing liquid. Some of the splashed washing liquid will collide inside the scrubbing tower 1, changing the splash path again. As a result, the washing liquid will be subjected to forces in multiple directions during the falling process, constantly impacting and splashing, avoiding the formation of stable water droplets or the appearance of a liquid film on the surface. The splashed washing liquid can contact and react with the rising waste gas, thereby reducing the proportion of unreacted washing liquid falling into the wastewater tank 25. In some specific implementations, a sealed door is rotatably connected to the surface of the washing tower 1, and the sealed door is located between adjacent splash columns 21; the sealed door allows a part of the washing tower 1 to be directly exposed to the environment, which is convenient for maintenance, and the sealed door is located between adjacent splash columns 21 and in the same position as the nozzle 23, which is convenient for inspecting the nozzle 23. In some specific implementations, a blocking ring 31 is fixedly connected to the surface of the splash ring 22. The edge of the blocking ring 31 coincides with the edge of the splash ring 22 away from the splash column 21. A partition net 32 ​​is slidably connected inside the blocking ring 31. The blocking ring 31 can block the flow of exhaust gas along the surface of the splash ring 22, preventing the washing liquid from being affected by the exhaust gas when it impacts and splashes, thus reducing the impact force. At the same time, the partition net 32 ​​allows some of the washing liquid remaining on the surface of the splash ring 22 to slide out along the partition net 32. If this part of the washing liquid is impacted and moves outward, the partition net 32 ​​can further change the impact direction. In a further embodiment, a plurality of connecting rods 33 are fixedly connected to the surface of the blocking ring 31, and the plurality of connecting rods 33 are arranged in a ring array on the surface of the splashing ring 22; the cross-section of the connecting rod 33 is an isosceles trapezoid, and the dimension of the connecting rod 33 on the side closer to the splashing column 21 is smaller than the dimension on the other side; by setting multiple connecting rods 33, multiple suspended areas can exist between the blocking ring 31 and the splashing ring 22, which facilitates the splashing of washing liquid. At the same time, by making the connecting rods 33 in the shape of an isosceles trapezoid, the washing liquid can be guided to flow away from the center of the washing tower 1, and the washing liquid is prevented from falling directly after entering the center. In a further embodiment, a limiting band 34 is slidably connected inside the connecting rod 33, a limiting spring is fixedly connected between the limiting band 34 and the connecting rod 33, a limiting post 35 is fixedly connected to the end of the limiting band 34, and a limiting groove is formed on the side of the connecting rod 33 away from the limiting band 34, the limiting groove being adapted to the limiting post 35; In some specific implementations, a motor 41 is fixedly connected to the surface of the washing tower 1. The motor 41 is electrically connected to an external power source. A drive rod 42 is fixedly connected to the end of the output shaft of the motor 41. A drive gear 43 is fixedly connected to the surface of the drive rod 42. A plurality of driving teeth 44 are fixedly connected to the surface of the splash column 21. The plurality of driving teeth 44 are arranged in a ring array on the surface of the splash column 21. The driving teeth 44 mesh with the drive gear 43. In a further embodiment, a central rotating gear 45 is rotatably connected inside the washing tower 1. The central rotating gear 45 meshes with a drive gear 43 and a driving gear 44. The distance between the drive gear 43 and the driving gear 44 is greater than zero, and the tooth profiles of the drive gear 43 and the driving gear 44 have no intersection point in space. By setting the central rotating gear 45 between the driving gear 44 and the drive gear 43, the rotation direction of the splash column 21 can be changed. Thus, multiple splash columns 21 with different directions can be set inside the washing tower 1 to provide different splash directions for different washing liquids and increase the possibility of washing liquid collision. In some specific implementations, a partition column 51 and a transition column 52 are fixedly connected inside the wastewater tank 25. The partition column 51 and the transition column 52 are fixedly connected. The edge of the partition column 51 coincides with the edge of the air inlet slot 24. Several through slots are formed on the surface of the partition column 51. By setting the partition column 51 inside the wastewater tank 25 and setting through slots on the surface of the partition column 51, the space where wastewater can flow out is reduced, and the waste gas is prevented from flowing to the through slots. In a further embodiment, a push column 53 is rotatably connected to the surface of the transition column 52, and a through rod 54 is slidably connected inside the push column 53, the through rod 54 being adapted to the through groove; a connecting spring 55 is fixedly connected between the through rod 54 and the push column 53; a push gear 56 is fixedly connected to the surface of the push column 53, the push gear 56 being rotatably disposed inside the washing tower 1, and a rotating gear 57 is fixedly connected to the surface of the drive rod 42, the push gear 56 meshing with the rotating gear 57; the push column 53 can rotate under the action of the drive rod 42, thereby driving the through rod 54 to rotate and insert into the through groove, avoiding the formation of a liquid film at the through groove position due to the tension of wastewater, which would affect the flow of wastewater; The working principle of this utility model: When treating the waste gas generated from acid production, the waste gas is first introduced into the scrubbing tower 1 through the air inlet trough 24, and the scrubbing liquid is injected through the nozzle 23. Then, the motor 41 is started. The motor 41 drives the drive rod 42 to rotate, which causes the drive gear 43 and the rotating gear 57 to rotate, which drives the splash column 21 and the push column 53 to rotate, causing the scrubbing liquid to hit the splash ring 22 and provide a force for further movement. The scrubbing liquid continuously impacts the waste gas, moves and falls during the impact process, and reacts with the waste gas.

[0021] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A waste gas treatment device for an acid production process, characterized in that, Includes a scrubbing tower (1) for treating waste gas, wherein the scrubbing tower (1) is provided with a splashing mechanism, the splashing mechanism comprising: A plurality of splash columns (21) are rotatably arranged inside the washing tower (1). The plurality of splash columns (21) are spaced apart inside the washing tower (1). A plurality of splash rings (22) are fixedly connected inside each splash column (21). The cross-section of the splash rings (22) is trapezoidal. Several nozzles (23) are inclinedly arranged inside the scrubbing tower (1). The nozzles (23) are divided into several groups. Each group of nozzles (23) is arranged between adjacent splash columns (21). The extended line of the centerline of the nozzle (23) intersects the edge of the splash ring (22). The washing tower (1) has an air inlet groove (24) and a wastewater groove (25) inside. An arc-shaped block (26) is fixedly connected inside the air inlet groove (24), and an indented block (27) is provided on the side of the air inlet groove (24) near the arc-shaped groove.

2. The waste gas treatment equipment in an acid production process as described in claim 1, characterized in that, The surface of the washing tower (1) is rotatably connected to a sealed door, which is located between adjacent splash columns (21).

3. The waste gas treatment equipment in an acid production process as described in claim 1, characterized in that, A blocking ring (31) is fixedly connected to the surface of the splash ring (22). The edge of the blocking ring (31) coincides with the edge of the splash ring (22) away from the splash column (21). A partition net (32) is slidably connected inside the blocking ring (31).

4. The waste gas treatment equipment in an acid production process as described in claim 3, characterized in that, The surface of the blocking ring (31) is fixedly connected with a number of connecting rods (33), and the connecting rods (33) are arranged in a ring array on the surface of the splash ring (22); the cross section of the connecting rod (33) is an isosceles trapezoid, and the dimension of the connecting rod (33) on the side closer to the splash column (21) is smaller than the dimension on the other side.

5. The waste gas treatment equipment in an acid production process as described in claim 4, characterized in that, The connecting rod (33) is internally connected to a limiting band (34), and a limiting spring is fixedly connected between the limiting band (34) and the connecting rod (33). A limiting post (35) is fixedly connected to the end of the limiting band (34). A limiting groove is opened on the side of the connecting rod (33) away from the limiting band (34), and the limiting groove is adapted to the limiting post (35).

6. The waste gas treatment equipment in an acid production process as described in claim 1, characterized in that, A motor (41) is fixedly connected to the surface of the washing tower (1), and a drive rod (42) is fixedly connected to the end of the output shaft of the motor (41). A drive gear (43) is fixedly connected to the surface of the drive rod (42). A number of driving teeth (44) are fixedly connected to the surface of the splash column (21). The number of driving teeth (44) are arranged in a ring array on the surface of the splash column (21). The driving teeth (44) mesh with the drive gear (43).

7. The waste gas treatment equipment in an acid production process as described in claim 6, characterized in that, The washing tower (1) is rotatably connected to a central gear (45), which meshes with a drive gear (43) and a driving tooth (44). The tooth profiles of the drive gear (43) and the driving tooth (44) do not intersect in space.

8. The waste gas treatment equipment in an acid production process as described in claim 6, characterized in that, The wastewater tank (25) is fixedly connected with a partition column (51) and a transition column (52). The partition column (51) and the transition column (52) are fixedly connected. The edge of the partition column (51) coincides with the edge of the air inlet slot (24). Several through slots are opened on the surface of the partition column (51).

9. The waste gas treatment equipment in an acid production process as described in claim 8, characterized in that, The transition column (52) is rotatably connected to a push column (53), and a through rod (54) is slidably connected inside the push column (53). The through rod (54) is adapted to the through groove. A connecting spring (55) is fixedly connected between the through rod (54) and the push column (53).

10. The waste gas treatment equipment in an acid production process as described in claim 9, characterized in that, A push gear (56) is fixedly connected to the surface of the push column (53). The push gear (56) is rotatably disposed inside the washing tower (1). A rotating gear (57) is fixedly connected to the surface of the drive rod (42). The push gear (56) meshes with the rotating gear (57).

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