High-pressure jet cleaning device for a spent acid treatment filler

Abstract

This utility model discloses a high-pressure jet cleaning device for treating acidic packing, including a two-stage removal tower, a first-stage flushing assembly, and a second-stage flushing assembly. The first-stage flushing assembly includes an outer flushing component, an inner flushing component, a first flushing section, a second flushing section, and a third flushing section. The second-stage flushing assembly includes a top flushing component and a top flushing section, with the top flushing component connected to an external high-pressure flushing pump. The two-stage removal tower is equipped with a separator to store the packing in sections, reducing the thickness of the packing. The first and third flushing sections work together to perform high-pressure flushing between the outer and inner flushing components. The third flushing section performs high-pressure flushing on the packing within the inner flushing component, causing the packing in the two-stage removal tower to tumble and surge upwards. In conjunction with the top flushing component and the top flushing section, high-pressure water jets are sprayed to flush the packing, thereby separating the crystals attached to the outer wall of the packing from the packing. This eliminates the need for manual refilling and flushing of the packing, improving work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of waste acid treatment technology, specifically to a high-pressure jet cleaning device for waste acid treatment packing. Background Technology

[0002] The waste acid sulfidation system employs a two-stage sulfidation process. Sodium hydrosulfide is added to generate hydrogen sulfide gas, which removes heavy metal ions such as arsenic from the waste acid in the form of sulfides. Because the sulfidation reaction produces hydrogen sulfide gas, the exhaust gas is first drawn into a primary treatment tower, where it is absorbed by waste acid spray. The absorbed exhaust gas then enters a secondary treatment tower for absorption by sodium hydroxide solution spray, and finally flows into the discharge outlet of the production wastewater dewashing device to meet emission standards. The secondary treatment tower is filled with 50mm diameter polypropylene multi-faceted hollow sphere packing. It uses alkaline solution spray to absorb residual hydrogen sulfide gas. Hydrogen sulfide reacts with sodium hydroxide to produce Na₂S·9H₂O. In an alkaline environment, the solubility of Na₂S·9H₂O decreases with increasing pH, easily forming needle-like crystals. These crystals cover the packing surface, reducing the effective specific surface area, increasing the pressure drop in the packing tower, and causing a decrease in the negative pressure of the sulfidation system.

[0003] Currently, every two months, personnel enter the control tower to remove the packing material, use a high-pressure water gun to wash away any crystals, and then backfill the tower after cleaning. Each backfilling operation requires four workers, involves replacing 1.5 m³ of packing material, and is labor-intensive, carries high safety risks, and has low packing material washing efficiency. Utility Model Content

[0004] The main purpose of this invention is to provide a high-pressure jet cleaning device for acid treatment packing, which solves the problem that in existing acid treatment systems, the packing in the secondary removal tower is easily covered by crystals, resulting in low efficiency and high labor intensity when cleaning the packing manually.

[0005] To achieve the above objectives, this utility model provides a high-pressure jet cleaning device for treating acidic waste packing, comprising:

[0006] A two-stage pest control tower is equipped with a partition; the partition divides the interior of the two-stage pest control tower into an upper packing area and a lower packing area; the upper packing area and the lower packing area are respectively filled with hollow spherical packing.

[0007] The primary flushing assembly includes an outer flushing component and an inner flushing component arranged in a ring within the upper and lower packing areas, respectively. The outer wall of the outer flushing component is adjacent to the inner wall of the secondary pollution control tower, and the outer flushing component has a first flushing section facing the center of the secondary pollution control tower. The inner flushing component is located inside the outer flushing component, and the inner flushing component has a second flushing section facing the center of the secondary pollution control tower and a third flushing section facing the inner wall of the secondary pollution control tower.

[0008] The secondary flushing assembly includes a top flushing component disposed at the top of the upper packing area and the lower packing area respectively, and a top flushing section disposed on the top flushing component; the top flushing component is connected to an external high-pressure flushing pump, and a connecting pipe is provided between the top flushing component and the outer and inner flushing components; the top flushing section is arranged along the circumference of the secondary pest control tower.

[0009] As a further improvement of this utility model, the separator includes a retaining ring disposed on the inner wall of the secondary toxicity removal tower and a separator plate installed on the retaining ring; the separator plate is provided with a drain hole.

[0010] As a further improvement of this utility model, the outer flushing component includes multiple sets of annular outer flushing rings arranged from top to bottom, and an outer support tube is provided between adjacent outer flushing rings; the outer support tube is connected to the interior of the outer flushing ring.

[0011] As a further improvement of this utility model, the inner flushing component includes multiple sets of annular inner flushing rings arranged from top to bottom. The inner diameter of the inner flushing ring is smaller than the inner diameter of the outer flushing ring, and an inner support tube is provided between adjacent inner flushing rings. The inner support tube is connected to the interior of the inner flushing ring.

[0012] As a further improvement of this utility model, the first flushing part is a first flushing slit provided on the outer flushing ring; the first flushing slits are spaced apart and face the center of the secondary pest control tower; the second flushing part is a second flushing slit provided on the inner wall of the inner flushing ring; the second flushing slits are spaced apart and face the center of the secondary pest control tower; the third flushing part is a third flushing slit provided on the outer wall of the inner flushing ring; the third flushing slits are spaced apart and face the inner wall of the secondary pest control tower.

[0013] As a further improvement of this utility model, the first flushing slit, the second flushing slit, and the third flushing slit are all inclined toward the top of the secondary pest control tower.

[0014] As a further improvement of this utility model, the top flushing component includes multiple sets of top flushing rings with different inner diameters and concentrically arranged; the top flushing rings are connected to the connecting pipe; the top flushing section consists of multiple sets of high-pressure nozzles spaced apart on the top flushing rings.

[0015] The beneficial effects of this utility model are reflected in:

[0016] By setting up separators to store the packing material inside the secondary treatment tower in separate zones, the thickness of the packing material is reduced. An outer flushing unit and an inner flushing unit are also installed. With the cooperation of the first and third flushing units, high-pressure flushing is applied between the outer and inner flushing units. The third flushing unit then applies high-pressure flushing to the packing material within the inner flushing unit, causing the packing material inside the secondary treatment tower to tumble and surge upwards. This, combined with the high-pressure water jets from the top flushing unit and top flushing unit, separates the crystals adhering to the outer wall of the packing material from the packing material itself. This eliminates the need for manual refilling and flushing of the packing material, improving work efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a high-pressure jet cleaning device for treating acidic waste.

[0018] Figure 2 This is a schematic diagram of the separator structure of a high-pressure jet cleaning device for treating acidic waste.

[0019] Figure 3 This is a schematic diagram of the primary flushing component and the secondary flushing component of a high-pressure jet cleaning device for treating acidic filler according to this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Secondary scavenging tower; 2. Separator; 201. Baffle ring; 202. Separator plate; 203. Drain hole; 3. Upper packing area; 4. Lower packing area; 5. Outer flushing component; 501. Outer flushing ring; 502. Outer support pipe; 6. Inner flushing component; 601. Inner flushing ring; 602. Inner support pipe; 7. First flushing section; 701. First flushing slot; 8. Second flushing section; 801. Second flushing slot; 9. Third flushing section; 901. Third flushing slot; 10. Top flushing component; 1001. Top flushing ring; 11. Top flushing section; 1101. High-pressure nozzle; 12. High-pressure flushing pump; 13. Connecting pipe; 14. Fixing hole; 15. Fixing column; 16. Through hole; 17. Connection hole; 18. Transition pipe. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the described embodiments are merely some, not all, of the embodiments of this utility model. Unless otherwise specified, the embodiments and features described in this application can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0023] In one embodiment, see Figure 1 This utility model discloses a high-pressure jet cleaning device for treating acidic waste, comprising a secondary removal tower 1, a primary flushing assembly, and a secondary flushing assembly.

[0024] The secondary pest control tower 1 is equipped with a partition 2, which divides the interior of the secondary pest control tower 1 into an upper packing zone 3 and a lower packing zone 4. The upper packing zone 3 and the lower packing zone 4 are filled with hollow spherical packing. The primary flushing assembly includes an outer flushing component 5 and an inner flushing component 6, which are respectively arranged in a ring shape in the upper packing zone 3 and the lower packing zone 4. The outer wall of the outer flushing component 5 is adjacent to the inner wall of the secondary pest control tower 1, and the outer flushing component 5 has a first flushing section 7 facing the center of the secondary pest control tower 1. The inner flushing component 6 is located outside the outer flushing component. Inside component 5, the inner flushing component 6 is provided with a second flushing section 8 facing the center of the secondary pest control tower 1 and a third flushing section 9 facing the inner wall of the secondary pest control tower 1; the secondary flushing assembly includes a top flushing component 10 respectively disposed at the top of the upper packing area 3 and the lower packing area 4, and a top flushing section 11 disposed on the top flushing component 10. The top flushing component 10 is connected to the external high-pressure flushing pump 12, and a connecting pipe 13 is provided between the top flushing component 10 and the outer flushing component 5 and the inner flushing component 6; the top flushing section 11 is arranged along the circumference of the secondary pest control tower 1.

[0025] Furthermore, the separator 2 includes a retaining ring 201 disposed on the inner wall of the secondary hazard removal tower 1, a separator plate 202 installed on the retaining ring 201, and a drain hole 203 provided on the separator plate 202.

[0026] Preferably, the retaining ring 201 is fixedly connected to the inner wall of the secondary pest control tower 1. The retaining ring 201 is provided with a fixing hole 14, and the partition plate 202 is provided with a fixing post 15. The fixing post 15 is inserted into the fixing hole 14, thereby fixing the relative position of the partition plate 202 and the retaining ring 201.

[0027] Furthermore, the outer flushing component 5 includes multiple sets of annular outer flushing rings 501 arranged from top to bottom, and an outer support tube 502 is provided between adjacent outer flushing rings 501. The outer support tube 502 is connected to the interior of the outer flushing ring 501.

[0028] Preferably, the outer flushing ring 501 is a hollow annular tube, the outer support tube 502 is a hollow cylindrical tube, the outer flushing ring 501 is provided with a through hole 16, and the two ends of the outer support tube 502 are located at the through hole 16 and welded to the outer flushing ring 501.

[0029] Furthermore, the inner flushing component 6 includes multiple sets of annular inner flushing rings 601 arranged from top to bottom. The inner diameter of the inner flushing ring 601 is smaller than the inner diameter of the outer flushing ring 501. An inner support tube 602 is provided between adjacent inner flushing rings 601, and the inner support tube 602 communicates with the interior of the inner flushing ring 601.

[0030] Preferably, the inner flushing ring 601 is a hollow annular tube, the inner support tube 602 is a hollow cylindrical tube, the inner flushing ring 601 is provided with a connection hole 17, and the two ends of the inner support tube 602 are located at the connection hole 17 and welded to the inner flushing ring 601.

[0031] Preferably, the inner diameter of the inner flushing ring 601 is smaller than the inner diameter of the outer flushing ring 501, so that there is a gap between the inner flushing ring 601 and the outer flushing ring 501. After the hollow ball packing is filled, it is located inside the outer flushing ring 501 and the inner flushing ring 601.

[0032] Preferably, the connecting pipe 13 is connected to the outer flushing ring 501, and a liquid delivery pipe is provided between the outer flushing ring 501 and the inner flushing ring 601.

[0033] Furthermore, the first flushing section 7 is a first flushing slit 701 provided on the outer flushing ring 501, the first flushing slits 701 are spaced apart and face the center of the secondary pest control tower 1; the second flushing section 8 is a second flushing slit 801 provided on the inner wall of the inner flushing ring 601, the second flushing slits 801 are spaced apart and face the center of the secondary pest control tower 1; the third flushing section 9 is a third flushing slit 901 provided on the outer wall of the inner flushing ring 601, the third flushing slits 901 are spaced apart and face the inner wall of the secondary pest control tower 1.

[0034] Preferably, the first flushing slot 701, the second flushing slot 801, and the third flushing slot 901 are elongated flat slots, which can be milled using a milling machine.

[0035] Furthermore, the first flushing joint 701, the second flushing joint 801, and the third flushing joint 901 are all inclined toward the top of the secondary hazard removal tower 1.

[0036] Preferably, the angle between the first flushing joint 701, the second flushing joint 801, the third flushing joint 901 and the horizontal plane is in the range of 15°-45°.

[0037] Preferably, the first flushing slot 701 and the third flushing slot 901 are located at the same horizontal level.

[0038] In the above setup, the external high-pressure flushing pump 12 delivers flushing fluid through the connecting pipe 13 into the outer flushing ring 501 and the inner flushing ring 601. The flushing fluid is then sprayed out through the first flushing slot 701, the second flushing slot 801, and the third flushing slot 901. The flushing fluid sprayed from the first flushing slot 701 and the third flushing slot 901 operates on the hollow spherical packing material between the outer flushing ring 501 and the inner flushing ring 601. Since the outer flushing ring 501 and the inner flushing ring 601 are both arranged in multiple sets from top to bottom, the first flushing slot 701 and the third flushing slot 901... Multiple sets are set from top to bottom to reduce the thickness of the hollow ball packing material flushed by the first flushing slit 701 and the third flushing slit 901 in each layer. The high-speed sprayed cleaning fluid can drive the hollow ball packing material to move. Since the first flushing slit 701 and the second flushing slit 801 are set at an upward angle, the hollow ball packing material rolls upward, washing away the crystals on the surface of the hollow ball packing material. The part of the hollow ball packing material located in the inner flushing ring 601 is washed clean by the high-speed cleaning fluid sprayed from the second flushing slit 801, and the rinsing distance is the same as that of the first flushing slit 701.

[0039] It should be noted that the external high-pressure flushing pump 12 is an existing structure, and no improvements are proposed to its internal structure in this application. The external high-pressure flushing pump 12 is only used to transport and pressurize the cleaning fluid. In this embodiment, the hollow ball packing in the secondary treatment tower 1 is 1.5m³, the diameter of the secondary treatment tower 1 is 1m, and the original hollow ball packing is 1.5m. The hollow ball packing is divided into two parts by a partition, and the height of each part of the hollow ball packing is 0.8m, thereby reducing the stacking thickness of the hollow ball packing. The cleaning fluid is the gypsum residue filtrate from the acid neutralization section, with a temperature of 50~60℃ and a pH value of 8-10. The packing layer is penetrated by hot water pressure of 10-25MPa to peel off the crystalline dirt on the outside of the hollow ball packing.

[0040] Furthermore, the top flushing component 10 includes multiple sets of top flushing rings 1001 with different inner diameters and concentrically arranged. The top flushing rings 1001 are connected to the connecting pipe 13. The top flushing part 11 consists of multiple sets of high-pressure nozzles 1101 spaced apart on the top flushing rings 1001.

[0041] Preferably, the top flushing ring 1001 is a hollow annular tube, and a transition tube 18 is provided between adjacent top flushing rings 1001.

[0042] Preferably, the high-pressure nozzle 1101 adopts a fan-shaped nozzle (jet angle 65°) to expand the coverage area, and the target distance is controlled at 20-30cm.

[0043] In the above configuration, the high-pressure nozzles 1101 are installed along the annular top flushing ring 1001, enabling them to spray cleaning fluid in a ring shape. The high-pressure nozzles 1101 are positioned on top flushing rings 1001 with different inner diameters, causing the cleaning fluid sprayed from the high-pressure nozzles 1101 to form annular zones of different sizes, acting on different areas inside the secondary treatment tower 1. For example, if three sets of top flushing rings 1001 with different inner diameters are installed, the cleaning fluid sprayed from the high-pressure nozzles 1101 on the outermost top flushing ring 1001 is close to the inner wall of the secondary treatment tower 1, while the cleaning fluid sprayed from the high-pressure nozzles 1101 on the innermost top flushing ring 1001... The cleaning fluid sprayed from the high-pressure nozzle 1101 is close to the center of the secondary purging tower 1. The cleaning fluid sprayed from the high-pressure nozzle 1101 on the top flushing ring 1001 of the middle layer is close to the inner flushing ring 601. After the hollow ball packing is flushed and rolled upward by the first flushing slot 701, the second flushing slot 801 and the third flushing slot 901 on the outer flushing ring 501 and the inner flushing ring 601, the external high-pressure cleaning pump pumps the cleaning fluid into the high-pressure nozzle 1101. The multi-layer high-pressure nozzle 1101 flushes the hollow ball packing again from top to bottom, improving the flushing efficiency of the hollow ball packing.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-pressure jet cleaning device for treating acidic wastewater, characterized in that, include: A secondary pest control tower (1) is provided with a partition (2); the partition (2) divides the interior of the secondary pest control tower (1) into an upper packing area (3) and a lower packing area (4); the upper packing area (3) and the lower packing area (4) are respectively filled with hollow spherical packing. The primary flushing assembly includes an outer flushing component (5) and an inner flushing component (6) arranged in a ring within the upper packing area (3) and the lower packing area (4), respectively. The outer wall of the outer flushing component (5) is adjacent to the inner wall of the secondary pest control tower (1), and the outer flushing component (5) is provided with a first flushing section (7) facing the center of the secondary pest control tower (1). The inner flushing component (6) is located inside the outer flushing component (5), and the inner flushing component (6) is provided with a second flushing section (8) facing the center of the secondary pest control tower (1) and a third flushing section (9) facing the inner wall of the secondary pest control tower (1). The secondary flushing assembly includes a top flushing component (10) respectively disposed on the top of the upper packing area (3) and the lower packing area (4), and a top flushing section (11) disposed on the top flushing component (10); the top flushing component (10) is connected to an external high-pressure flushing pump (12), and a connecting pipe (13) is provided between the top flushing component (10) and the outer flushing component (5) and the inner flushing component (6); the top flushing section (11) is arranged along the circumference of the secondary hazard removal tower (1).

2. The high-pressure jet cleaning device for treating acidic wastewater as described in claim 1, characterized in that: The separator (2) includes a baffle ring (201) installed on the inner wall of the secondary hazard removal tower (1) and a separator plate (202) installed on the baffle ring (201); the separator plate (202) is provided with a drain hole (203).

3. The high-pressure jet cleaning device for treating acidic wastewater as described in claim 2, characterized in that: The outer flushing component (5) includes multiple sets of annular outer flushing rings (501) arranged from top to bottom, and an outer support tube (502) is provided between adjacent outer flushing rings (501); the outer support tube (502) is connected to the interior of the outer flushing ring (501).

4. The high-pressure jet cleaning device for treating acidic wastewater as described in claim 3, characterized in that: The inner flushing component (6) includes multiple sets of annular inner flushing rings (601) arranged from top to bottom. The inner diameter of the inner flushing ring (601) is smaller than the inner diameter of the outer flushing ring (501). An inner support tube (602) is provided between adjacent inner flushing rings (601). The inner support tube (602) is connected to the interior of the inner flushing ring (601).

5. The high-pressure jet cleaning device for treating acidic wastewater as described in claim 4, characterized in that: The first flushing section (7) is a first flushing slit (701) provided on the outer flushing ring (501); the first flushing slit (701) is spaced apart and faces the center of the secondary pest control tower (1); the second flushing section (8) is a second flushing slit (801) provided on the inner wall of the inner flushing ring (601); the second flushing slit (801) is spaced apart and faces the center of the secondary pest control tower (1); the third flushing section (9) is a third flushing slit (901) provided on the outer wall of the inner flushing ring (601); the third flushing slit (901) is spaced apart and faces the inner wall of the secondary pest control tower (1).

6. The high-pressure jet cleaning device for treating acidic wastewater as described in claim 5, characterized in that: The first flushing slit (701), the second flushing slit (801), and the third flushing slit (901) are all inclined toward the top of the secondary pest control tower (1).

7. The high-pressure jet cleaning device for treating acidic wastewater as described in claim 6, characterized in that: The top flushing component (10) includes multiple sets of top flushing rings (1001) with different inner diameters and concentric arrangement; the top flushing rings (1001) are connected to the connecting pipe (13); the top flushing part (11) consists of multiple sets of high-pressure nozzles (1101) spaced apart on the top flushing rings (1001).

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