A waste gas treatment water washing spray tower and process for preparing sodium hydrosulfide

Abstract

This invention discloses a waste gas treatment water scrubbing spray tower and process for preparing sodium hydrosulfide, relating to the field of waste gas treatment technology. The waste gas treatment water scrubbing spray tower for preparing sodium hydrosulfide utilizes the hydrodynamic power of the spray liquid to drive the conical cylinder in a swinging rotation. Simultaneously, the spray pipes are controlled and adjusted for spray angle via a gear and rack structure. After the spray holes rotate out of the dustproof tank, the spray angle can be flexibly adjusted within a certain angle range, achieving dual-dimensional control of swinging rotation and adjustable angle. The spray liquid is no longer limited to a single direction but diffuses in multiple directions and angles, significantly expanding the spray liquid distribution range and avoiding blind spots. Furthermore, due to the swinging rotation of the conical cylinder, the spray liquid can cover a larger surrounding area. Therefore, compared to traditional spray towers, only a small number of spray components are needed to meet the spraying requirements, greatly reducing the cost of installing a large number of spray heads and also reducing the difficulty of subsequent inspection and maintenance of the spray components.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, specifically to a waste gas treatment water scrubbing spray tower and process for preparing sodium hydrosulfide. Background Technology

[0002] The waste gas produced during the preparation of sodium hydrosulfide mainly contains hydrogen sulfide, and may also contain small amounts of sulfur oxides, ammonia, etc. Since hydrogen sulfide is a highly toxic gas with a strong rotten egg smell, even low concentrations can irritate the respiratory tract, and high concentrations can lead to suffocation or even death. It is also flammable and explosive, and its emission will pollute the atmosphere and may even form acid rain. Therefore, the waste gas produced during the preparation of sodium hydrosulfide needs to be purified before it can be discharged.

[0003] Referring to the water scrubbing tower for volatile organic compound (VOC) treatment disclosed in patent application CN210814673U, waste gas is introduced from the tail gas inlet at the bottom of the cylinder, washed through two spray layers, and reacted with circulating liquid to remove harmful substances before being discharged to the next stage through the tail gas outlet. A liquid storage chamber is installed on the top of the cylinder above the tail gas outlet. Circulating liquid is injected into the storage chamber before spraying, and only when full does it enter the spray pipes. In case of emergency supply interruption, the storage chamber can be temporarily replenished with circulating liquid, allowing operators time to react. Furthermore, no external pressurization is required; the water pressure provided by the storage chamber is matched to the decreasing waste gas treatment volume from bottom to top, and the spray area is synchronously matched to ensure treatment effectiveness.

[0004] The water washing towers described above have the following drawbacks in practical use: 1) Traditional spray towers for waste gas treatment mostly rely on spray heads with fixed angles or a single spray mechanism. The spray range of the spray liquid is limited and the angle is fixed, which easily creates uncovered blind spots inside the spray tower. To reduce blind spots, a large number of additional spray heads are required, which not only increases the equipment procurement cost, but also increases the workload and difficulty of later maintenance and replacement due to the large number of spray components.

[0005] 2) The exhaust gas contains a lot of impurities. The spray holes of traditional spray towers are exposed to the outside for a long time. Impurities in the exhaust gas can easily enter the holes and cause blockages. Frequent manual disassembly and cleaning are required. The equipment cannot operate during disassembly and cleaning, which reduces the efficiency of exhaust gas treatment. At the same time, the connection method of traditional spray components is mostly fixed welding or non-removable design. When inspecting and replacing parts later, the entire spray mechanism needs to be disassembled, resulting in high maintenance costs.

[0006] Therefore, this invention proposes a waste gas treatment water scrubbing spray tower and process for preparing sodium hydrosulfide to solve the above problems. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a waste gas treatment water scrubbing spray tower and process for preparing sodium hydrosulfide. It solves the problems of traditional waste gas treatment spray towers, which rely heavily on fixed-angle spray heads or single spray mechanisms. This results in limited spray range and fixed angles, easily creating uncovered blind spots within the tower. To reduce these blind spots, a large number of additional spray heads are required, increasing equipment procurement costs and adding to the workload and difficulty of later maintenance and replacement due to the excessive number of spray components. Furthermore, waste gas contains many impurities, and the spray holes of traditional spray towers are constantly exposed, allowing impurities to easily enter and cause blockages. Frequent manual disassembly and cleaning are necessary, during which the equipment cannot operate, reducing waste gas treatment efficiency. Additionally, traditional spray head connections are often fixed welded or non-removable, requiring complete disassembly of the spray mechanism for later maintenance and component replacement, leading to high maintenance costs.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a waste gas treatment scrubbing tower for preparing sodium hydrosulfide, comprising a scrubbing tower cylinder and a scrubbing liquid storage tank fixedly installed on its side wall, wherein a water pump is also provided on one side of the scrubbing liquid storage tank, the water pump inputting the scrubbing liquid inside the scrubbing liquid storage tank into the scrubbing tower cylinder through a scrubbing liquid delivery pipe, and further comprising: Spraying mechanism No. 1, spraying mechanism No. 2, spraying mechanism No. 3 and spraying mechanism No. 4 are evenly arranged inside the spraying tower from bottom to top. They are used to evenly spray the spraying liquid from the spraying liquid delivery pipe. During the spraying process, the spraying mechanism automatically adjusts its spraying posture using the hydrodynamics of the spraying liquid to increase the distribution range of the spraying liquid. In the process of adjusting the spraying posture, the flow path of the exhaust gas and the spraying liquid is disturbed simultaneously to accelerate the mixing uniformity of the exhaust gas and the spraying liquid. The No. 1 spraying mechanism also includes a main pipe and multiple branch pipes evenly arranged on the main pipe. Multiple connecting pipes are fixedly installed at the bottom of the main pipe and the branch pipes. A lifting frame is also fixedly fitted on the outer wall of the connecting pipe. The bottom of each connecting pipe is connected to a spraying component for increasing the spraying range of the spraying liquid and accelerating the reaction speed between the exhaust gas and the spraying liquid through the lifting frame. Multiple packing layers are evenly arranged inside the spray tower and correspond one-to-one with the positions of the No. 1, No. 2, No. 3, and No. 4 spray mechanisms to further increase the reaction time between the spray liquid and the exhaust gas.

[0009] Furthermore, the spray assembly includes a mounting frame and a rotating seat fixedly disposed at the bottom of the inner cavity of the mounting frame. An annular stabilizing frame is also fixedly disposed on the inner wall of the mounting frame. An annular groove is formed on the inner wall of the annular stabilizing frame. A spray execution assembly is movably disposed between the rotating seat and the annular stabilizing frame. The spray execution assembly is driven by a power conversion assembly to complete the rotation and swing operation. The power conversion assembly is disposed above the spray execution assembly.

[0010] Furthermore, the power conversion assembly includes a spray liquid transfer cylinder fixedly installed inside the main pipe and a connecting pipe fixedly installed on the top of the spray liquid transfer cylinder. A drain nozzle is fixedly installed on the lower outer wall of the spray liquid transfer cylinder. A drive shaft is rotatably installed inside the spray liquid transfer cylinder via a bracket. An impeller and a rocker arm are fixedly installed at the top and bottom ends of the drive shaft, respectively. An assembly is installed below the spray liquid transfer cylinder. An annular groove is formed on the outer wall of the assembly. Multiple through holes are evenly formed on the inner wall of the annular groove. A rotating sleeve is also sealed and rotatably fitted inside the annular groove. A liquid outlet is fixedly installed on the outer wall of the rotating sleeve. The liquid outlet and the drain nozzle are connected by a second flexible hose for inputting the spray liquid in the spray liquid transfer cylinder into the assembly through the drain nozzle, the second flexible hose, the liquid outlet, and the through holes. A vertical shaft is fixedly installed on the top of the assembly via an end cap. A guide post is fixedly installed on the side wall of the vertical shaft. The guide post is slidably installed in an annular groove on the inner wall of the annular stabilizer.

[0011] Furthermore, the spray execution assembly includes a conical cylinder and an assembly pipe fixedly disposed on its top. Multiple baffles are uniformly fixedly disposed around the top of the conical cylinder and the assembly pipe. An upper inner cylinder is also fixedly disposed inside the conical cylinder and its top is sealed to the bottom of the assembly pipe. A lower inner cylinder is fixedly disposed at the bottom of the upper inner cylinder and a ball head is fixedly disposed at the bottom of the lower inner cylinder.

[0012] Furthermore, multiple dustproof grooves are evenly distributed on the outer wall of the conical cylinder, and a spray unit is rotatably arranged inside each dustproof groove. The spray unit and the lower inner cylinder are connected by a first flexible hose to guide the spray liquid in the lower inner cylinder into the spray unit. The multiple spray units are driven by a power component to adjust the spray angle of the spray liquid. The spray unit includes a spray pipe, one end of which is fixedly provided with a hollow shaft communicating with its interior. A gear is fixedly sleeved on the outer wall of the hollow shaft. Multiple spray holes are also evenly distributed on the outer wall of the spray pipe.

[0013] Furthermore, the power assembly includes an annular frame fixedly installed inside the upper inner cylinder. A limiting plate is fixedly installed on the top of the annular frame. Multiple conveying channels for the spray liquid to pass through are evenly opened on the top of the limiting plate. A lifting column is also slidably inserted inside the limiting plate. A conical column is fixedly installed at one end of the lifting column located below the limiting plate, and a spring baffle is fixedly installed at the top of the lifting column. A first spring is slidably sleeved on the outer wall of the lifting column between the spring baffle and the limiting plate.

[0014] Furthermore, the conical surface of the conical column is uniformly provided with drive rod units that correspond one-to-one with the positions of multiple spray units. The multiple drive rod units synchronously drive the multiple spray units to rotate a preset angle by the downward thrust of the conical column.

[0015] Furthermore, the drive rod unit includes a drive column that slides through the upper inner cylinder in a sealed manner. A rack that meshes with a gear is fixedly installed at one end of the drive column away from the tapered column. A ball bearing is rotatably installed at the other end of the drive column. A spring retaining ring is fixedly sleeved on the outer wall of the drive column. A second spring is slidably sleeved on the outer wall of the drive column between the upper inner cylinder and the spring retaining ring. A limiting post for limiting the downward movement height of the tapered column is fixedly installed at the bottom of the inner cavity of the lower inner cylinder.

[0016] This invention also discloses a method for treating waste gas used in the preparation of sodium hydrosulfide, using a water scrubbing spray tower for treating waste gas used in the preparation of sodium hydrosulfide. The method includes the following steps: Step 1: The water pump draws the spray liquid from the spray liquid storage tank and inputs it into the spray liquid delivery pipe. The spray liquid is then delivered to the No. 1 spray mechanism, the No. 2 spray mechanism, the No. 3 spray mechanism, and the No. 4 spray mechanism through multiple branch pipes on the side wall of the spray liquid delivery pipe. Step 2: The spray liquid enters the main pipe through the pipeline and then is distributed into multiple branch pipes. Then, the spray liquid is sprayed out through multiple spray components. The waste gas generated from the preparation of sodium hydrosulfide is input from the bottom of the spray tower. Step 3: While multiple spray components spray the spray liquid, they swing and rotate due to the drive of the spray liquid to increase the distribution range of the spray liquid. The waste gas generated in the preparation of sodium hydrosulfide reacts with the spray liquid in the initial contact and then undergoes a secondary reaction in the packing layer. The purified waste gas is discharged through the top of the spray tower. Step 4: After the exhaust gas treatment is completed, the water pump stops working, and the spray assembly automatically returns to the dustproof state as it loses the drive of the spray liquid.

[0017] This invention provides a waste gas treatment water scrubbing spray tower and process for preparing sodium hydrosulfide. Compared with the prior art, it has the following advantages: 1. A waste gas treatment water scrubbing spray tower and process for preparing sodium hydrosulfide, which automatically adjusts the spraying posture during the spraying process by setting up spraying components. The spraying liquid is used to drive the conical cylinder to swing and rotate, and the spraying pipe is controlled and adjusted by a gear and rack structure. After the spraying holes rotate out of the dustproof tank, the spraying angle can be flexibly adjusted within a certain angle range, realizing dual-dimensional control of swinging rotation and adjustable angle. The spraying liquid is no longer limited to a single direction, but diffuses in multiple directions and angles, greatly expanding the distribution range of the spraying liquid and avoiding spraying blind spots. Furthermore, due to the swinging rotation of the conical cylinder, the spraying liquid can cover a larger surrounding area. Therefore, compared with traditional spray towers, only a small number of spraying components are needed to meet the spraying requirements, which greatly reduces the cost of setting up a large number of spray heads, and also reduces the difficulty of subsequent inspection and maintenance of the spraying components.

[0018] 2. A waste gas treatment water scrubbing spray tower and process for preparing sodium hydrosulfide, which, by setting a baffle plate on a conical cylinder, can simultaneously disturb the flow path of waste gas and spray liquid while the conical cylinder rotates, accelerates the uniformity of gas-liquid mixing, and further enhances the reaction rate by spraying the spray liquid at multiple angles and directions, and efficiently captures harmful components in waste gas. The rotation and oscillation of the spray component and the adjustment of the spray angle all rely on the hydrodynamic power of the spray liquid itself. The power is transmitted through a power conversion component, eliminating the need for additional drive equipment such as motors, thereby reducing external energy consumption and lowering equipment operating costs.

[0019] 3. A waste gas treatment water scrubbing spray tower and process for preparing sodium hydrosulfide, wherein the spray unit is designed with a dustproof self-protection function. In the initial state or after shutdown, the dustproof state is automatically restored by the second spring. The spray holes on the spray pipe are tightly attached to the inner wall of the dustproof tank to prevent impurities in the waste gas from entering the spray holes and causing blockage, reducing the frequency of cleaning and the probability of failure. No manual intervention is required, and the operation is simple. When performing spraying work, the equipment automatically switches to the spraying state under the hydrodynamic drive of the spraying liquid. Secondly, the spray components adopt a detachable sealed connection design, such as connecting pipes and connecting tubes, assembly pipes and assembly tubes, mounting brackets and lifting brackets, etc., which are easy to disassemble and assemble, and facilitate later inspection, replacement of parts and maintenance.

[0020] 4. A waste gas treatment water scrubbing spray tower and process for preparing sodium hydrosulfide, wherein the water pump is controlled to output the spray liquid in a fluctuating manner, that is, to output spray liquid with different flow rates intermittently in a certain regular pattern, so that the power driving the conical column also fluctuates in a regular manner, and the conical column can move up and down within a certain height range, thereby controlling the rack and pinion drive gear to rotate back and forth within a certain angle range. During the reciprocating rotation, the position of the spray pipe continuously changes the position of the spray hole, thereby further increasing the spraying radiation range of the spray liquid, which can meet the purpose of covering the cross section of the spray tower with a small number of spray components.

[0021] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the first overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the structure of the spray tower removed according to the present invention; Figure 3 This is a schematic diagram of the No. 1 spraying mechanism of the present invention; Figure 4 For the present invention Figure 3 A magnified structural diagram of part A in the diagram; Figure 5 This is a schematic diagram of the overall structure of the spray assembly of the present invention; Figure 6 This is a cross-sectional view of the spray assembly of the present invention; Figure 7 For the present invention Figure 6 A magnified structural diagram of part B in the diagram; Figure 8 For the present invention Figure 6 A magnified structural diagram of part C in the diagram; Figure 9 This is an exploded view of the spray execution component and power conversion component of the present invention. Figure 10 For the present invention Figure 9 A magnified structural diagram of part D in the diagram; Figure 11 This is a first cross-sectional view of the spray execution component of the present invention; Figure 12 For the present invention Figure 11 A magnified structural diagram of part E in the diagram; Figure 13 This is a schematic diagram of the second cross-sectional structure of the spray execution component of the present invention; Figure 14 This is a schematic diagram of the assembly state of the spray unit and rack of the present invention.

[0023] In the diagram: 1. Spray tower; 2. Spray liquid storage tank; 3. Water pump; 4. Spray liquid delivery pipe; 5. No. 1 spray mechanism; 51. Main pipe; 52. Branch pipe; 53. Connecting pipe; 54. Lifting frame; 55. Spray assembly; 551. Mounting frame; 552. Rotating seat; 553. Annular stabilizer; 554. Spray actuator assembly; b1. Conical cylinder; b2. Assembly pipe; b3. Baffle; b4. Upper inner cylinder; b5. Lower inner cylinder; b6. Ball head; b7. Dustproof trough; b8. Spray unit; b81. Spray pipe; b82. Hollow shaft; b83. Gear; b84. Spray hole; b9. First flexible hose; b10. Annular frame; b1 1. Limiting plate; b12. Lifting column; b13. Conical column; b14. First spring; b15. Drive column; b16. Rack; b17. Ball bearing; b18. Spring retaining ring; b19. Second spring; b20. Limiting column; 555. Power conversion assembly; a1. Spray liquid transfer cylinder; a2. Drain nozzle; a3. Drive shaft; a4. Impeller; a5. Rocker arm; a6. Assembly kit; a7. Annular groove; a8. Through hole; a9. Rotating sleeve; a10. Discharge nozzle; a11. Second hose; a12. Vertical shaft; a13. Guide column; 6. Second spray mechanism; 7. Third spray mechanism; 8. Fourth spray mechanism; 9. Packing layer. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] This invention provides three technical solutions: a waste gas treatment water scrubbing spray tower for preparing sodium hydrosulfide, specifically including the following embodiments: like Figures 1-5 The first embodiment is shown: a waste gas treatment water scrubbing tower for preparing sodium hydrosulfide, including a scrubbing tower cylinder 1 and a scrubbing liquid storage tank 2 fixedly installed on its side wall. A water pump 3 is also installed on one side of the scrubbing liquid storage tank 2. The water pump 3 inputs the scrubbing liquid inside the scrubbing liquid storage tank 2 into the scrubbing tower cylinder 1 through a scrubbing liquid delivery pipe 4. The tower also includes: Spraying mechanism 5, spraying mechanism 6, spraying mechanism 7 and spraying mechanism 8 are evenly arranged inside the spraying tower 1 from bottom to top. They are used to evenly spray the spraying liquid from the spraying liquid delivery pipe 4. During the spraying process, the spraying mechanism automatically adjusts its spraying posture using the hydrodynamics of the spraying liquid to increase the distribution range of the spraying liquid. In the process of adjusting the spraying posture, the flow path of the exhaust gas and the spraying liquid is disturbed simultaneously to accelerate the mixing uniformity of the exhaust gas and the spraying liquid. The No. 1 spraying mechanism 5 also includes a main pipe 51 and multiple branch pipes 52 evenly arranged on the main pipe 51. Multiple connecting pipes 53 are fixedly installed at the bottom of the main pipe 51 and the branch pipes 52. A lifting frame 54 is also fixedly sleeved on the outer wall of the connecting pipe 53. The bottom of each connecting pipe 53 is connected to a spraying component 55 through the lifting frame 54 to increase the spraying range of the spraying liquid and accelerate the reaction speed of the exhaust gas and the spraying liquid. Multiple packing layers 9 are evenly arranged inside the spray tower 1 and correspond one-to-one with the positions of spray mechanism 5, spray mechanism 6, spray mechanism 7, and spray mechanism 8 to further increase the reaction time between the spray liquid and the waste gas. The multiple packing layers 9 are distributed from bottom to top, and are located above spray mechanism 5, spray mechanism 6, spray mechanism 7, or spray mechanism 8 at their respective positions. The spray liquid can form multiple bubble films in the packing layers 9 to increase the contact area with the waste gas, thereby fully capturing the waste gas and improving the waste gas treatment effect. Spray mechanism 5, spray mechanism 6, spray mechanism 7, and spray mechanism 8 have the same structure. An waste gas inlet pipe is also fixedly installed on one side of the outer wall of the spray tower 1, below spray mechanism 5.

[0026] like Figures 5-9 The second embodiment is shown, which differs from the first embodiment in that: the spray assembly 55 includes a mounting frame 551 and a rotating seat 552 fixedly disposed at the bottom of the inner cavity of the mounting frame 551. An annular stabilizer 553 is also fixedly disposed on the inner wall of the mounting frame 551. An annular groove is formed on the inner wall of the annular stabilizer 553. A spray execution assembly 554 is movably disposed between the rotating seat 552 and the annular stabilizer 553. The spray execution assembly 554 is driven by a power conversion assembly 555 to complete the rotation and swing operation. The power conversion assembly 555 is disposed above the spray execution assembly 554.

[0027] The spray assembly 55 features a "dual-dimensional automatic control" design. Driven by the hydrodynamic power of the spray liquid itself, the spray assembly 55 requires no additional motor and achieves two coordinated actions: First, the power conversion component 555 drives the conical cylinder b1 to rotate in a swinging motion, causing the spray unit b8 to swing around the central axis at a 70-degree angle, breaking the fixed spray trajectory; second, the gear b83 and rack b16 transmission structure controls the rotation of the spray pipe b81, allowing the spray hole b84 to rotate out of the dustproof groove b7 and flexibly adjust the spray angle within a certain angle range. This achieves dual-dimensional control of "swinging rotation + adjustable angle," meaning the spray liquid is no longer limited to a single direction but diffuses in multiple directions and angles.

[0028] The enhanced effect of the fluctuating output of water pump 3: By controlling water pump 3 to output spray liquid at regular intervals with different flow rates, the power driving the conical column b13 fluctuates regularly, causing the conical column b13 to move up and down reciprocally within a certain height range. This fluctuation is transmitted to the rack b16 and gear b83, causing the spray pipe b81 to continuously change the orientation of the spray holes b84 during reciprocating rotation, further expanding the radiation range of the spray liquid and ensuring that the spray liquid can evenly cover the entire cross-section of the spray tower 1. Thus, only a small number of spray components 55 are needed to achieve coverage of the inside of the spray tower 1 without dead angles, which reduces the procurement cost of spray components 55 and also reduces the difficulty of subsequent individual inspection and maintenance due to the small number of components, thus balancing coverage effect and economy.

[0029] In this embodiment, the power conversion assembly 555 includes a spray liquid transfer cylinder a1 fixedly disposed inside the main pipe 51 and a connecting pipe fixedly disposed on the top of the spray liquid transfer cylinder a1. A drain nozzle a2 is fixedly disposed on the lower outer wall of the spray liquid transfer cylinder a1. A drive shaft a3 is also rotatably disposed inside the spray liquid transfer cylinder a1 via a bracket. An impeller a4 and a rocker arm a5 are fixedly disposed at the top and bottom ends of the drive shaft a3, respectively. One end of the rocker arm a5 is fixedly connected to the vertical shaft a12. An assembly a6 is disposed below the spray liquid transfer cylinder a1. An annular groove a7 is formed on the outer wall of the assembly a6. The inner wall of the annular groove a7 is evenly distributed with... The device has multiple through holes a8. A rotating sleeve a9 is sealed and rotatably fitted inside the annular groove a7. A liquid outlet a10 is fixedly installed on the outer wall of the rotating sleeve a9. The liquid outlet a10 and the drain nozzle a2 are connected by a second flexible hose a11. This allows the spraying liquid in the rotating cylinder a1 to be fed into the assembly a6 through the drain nozzle a2, the second flexible hose a11, the liquid outlet a10, and the through holes a8. A vertical shaft a12 is fixedly installed on the top of the assembly a6 via an end cap. A guide post a13 is fixedly installed on the side wall of the vertical shaft a12. The guide post a13 is slidably installed in the annular groove on the inner wall of the annular stabilizer 553. The connecting pipe and the connecting tube 53 are designed for a detachable sealed connection. The top of the mounting bracket 551 is detachably connected to the bottom of the lifting bracket 54 by bolts. The spacing between adjacent through holes a8 is small, ensuring that the liquid outlet a10 can always be connected to all or part of the through hole a8 during rotation. The fitting a6 can be detachably sleeved on the outer wall of the assembly tube b2. When assembling the two, rubber sealing tape needs to be wrapped around the outer wall of the assembly tube b2.

[0030] In this embodiment, the spray execution component 554 includes a conical cylinder b1 and an assembly pipe b2 fixedly disposed on its top. Multiple baffles b3 are uniformly fixedly disposed around the top of the conical cylinder b1 and the assembly pipe b2. An upper inner cylinder b4 is also fixedly disposed inside the conical cylinder b1 and its top is sealed to the bottom of the assembly pipe b2. A lower inner cylinder b5 is fixedly disposed at the bottom of the upper inner cylinder b4, and a ball head b6 is fixedly disposed at the bottom of the lower inner cylinder b5.

[0031] In this embodiment, a plurality of dustproof grooves b7 are evenly distributed on the outer wall of the conical cylinder b1. A spray unit b8 is rotatably disposed inside each dustproof groove b7. The spray unit b8 is connected to the lower inner cylinder b5 via a first flexible hose b9 to guide the spray liquid from the lower inner cylinder b5 into the spray unit b8. The multiple spray units b8 are driven by a power component to adjust the spray angle of the spray liquid. Each spray unit b8 includes a spray pipe b81, one end of which is fixedly connected to a hollow shaft b82 communicating with its interior. A gear b83 is fixedly sleeved on the outer wall of the hollow shaft b82. A plurality of spray holes b84 are also evenly distributed on the outer wall of the spray pipe b81. The spray pipe b81 is rotatably disposed inside the dustproof groove b7, and the outer wall of the spray pipe b81 is in close contact with the inner wall of the dustproof groove b7. After the spray liquid enters the interior of the spray pipe b81 through the hollow shaft b82, it can only be sprayed out through the spray holes b84. In the initial state before the spray liquid is input, the side of the spray pipe b81 with the spray hole b84 is located inside the dustproof tank b7.

[0032] The spray unit b8 features a "dustproof self-protection + automatic switching" design. The spray unit b8 has a built-in second spring b19 and a dustproof groove b7, which enables automatic switching between the two states.

[0033] Initial or shutdown state: When there is no spray liquid input, the second spring b19 resets and pushes the drive column b15 back, the rack b16 drives the gear b83 to reverse, so that the spray hole b84 on the spray pipe b81 is tightly attached to the inner wall of the dustproof groove b7, completely sealing the opening of the spray hole b84, preventing impurities in the exhaust gas from entering the hole, and eliminating blockage from the source.

[0034] Operating status: When the spray liquid is input, the hydrodynamic force pushes the conical column b13 downward, which drives the drive column b15 to move outward. The rack b16 drives the gear b83 to rotate, the spray pipe b81 rotates out of the dustproof groove, and the spray hole b84 automatically opens to spray, without the need for manual intervention.

[0035] The core connection parts of this invention all adopt a detachable structure, including a detachable sealed connection between the connecting pipe and the connecting tube 53, a bolted detachable connection between the mounting bracket 551 and the lifting bracket 54, and a detachable fixed connection between the assembly a6 and the assembly tube b2. These designs allow for component disassembly and assembly without complex tools. During later maintenance, if a small amount of residual impurities needs to be cleaned, a single spray assembly 55 can be quickly disassembled without shutting down the entire spray mechanism. If a component is damaged, the corresponding damaged component can be directly replaced without replacing the entire spray unit b8, significantly shortening maintenance time and reducing maintenance difficulty and cost. This significantly reduces the probability of clogging of the spray holes b84, decreasing the frequency of cleaning; the convenient component disassembly and assembly and the simplified maintenance process reduce both labor costs and efficiency losses caused by equipment downtime for maintenance.

[0036] like Figures 10-14 The third embodiment is shown, which differs from the second embodiment in that: the power assembly includes an annular frame b10 fixedly disposed inside the upper inner cylinder b4, a limiting plate b11 fixedly disposed on the top of the annular frame b10, the top of the limiting plate b11 having a plurality of conveying channels for the spray liquid to pass through evenly, a lifting column b12 slidably passing through the inside of the limiting plate b11, a conical column b13 fixedly disposed at one end of the lifting column b12 located below the limiting plate b11, and a spring baffle fixedly disposed at the top of the lifting column b12, and a first spring b14 slidably sleeved on the outer wall of the lifting column b12 between the spring baffle and the limiting plate b11.

[0037] In this embodiment, drive rod units corresponding one-to-one with the positions of multiple spray units b8 are uniformly arranged on the conical surface of the conical column b13. The multiple drive rod units synchronously drive the multiple spray units b8 to rotate a preset angle by the downward thrust of the conical column b13.

[0038] In this embodiment, the drive rod unit includes a drive column b15 that slides through the upper inner cylinder b4 in a sealed manner. At one end of the drive column b15 away from the tapered column b13, a rack b16 that meshes with the gear b83 is fixedly provided. At the other end of the drive column b15, a ball bearing b17 is rotatably provided. A spring retaining ring b18 is fixedly sleeved on the outer wall of the drive column b15. A second spring b19 is slidably sleeved on the outer wall of the drive column b15 and located between the upper inner cylinder b4 and the spring retaining ring b18. A limiting column b20 is fixedly provided at the bottom of the inner cavity of the lower inner cylinder b5 to limit the height of the tapered column b13 as it moves downward.

[0039] This invention also provides a method for treating waste gas used in the preparation of sodium hydrosulfide, using a water scrubbing spray tower for treating waste gas used in the preparation of sodium hydrosulfide, the method comprising the following steps: Step 1: The water pump 3 draws the spray liquid from the spray liquid storage tank 2 and inputs it into the spray liquid delivery pipe 4. The spray liquid is then delivered to the No. 1 spray mechanism 5, No. 2 spray mechanism 6, No. 3 spray mechanism 7 and No. 4 spray mechanism 8 through multiple branch pipes on the side wall of the spray liquid delivery pipe 4. Step 2: The spray liquid enters the main pipe 51 through the pipeline and then is distributed to multiple branch pipes 52. The spray liquid is then sprayed out through multiple spray components 55. The waste gas generated from the preparation of sodium hydrosulfide is input from the bottom of the spray tower 1. Step 3: While multiple spray components 55 spray the spray liquid, they swing and rotate due to the drive of the spray liquid to increase the distribution range of the spray liquid. The waste gas generated from the preparation of sodium hydrosulfide reacts with the spray liquid in the initial contact and then undergoes a secondary reaction in the packing layer 9. The purified waste gas is discharged through the top of the spray tower 1.

[0040] Step 4: After the exhaust gas treatment is completed, the water pump 3 stops working, and the spray assembly 55 loses the drive of the spray liquid and automatically returns to the dustproof state. The specific process is as follows: the waste gas generated during the preparation of sodium hydrosulfide is introduced into the spray tower 1 through the waste gas input pipe and flows upward from the bottom of the No. 1 spraying mechanism 5.

[0041] At this time, the water pump 3 is started by the controller to draw the spray liquid in the spray liquid storage tank 2. The spray liquid can react chemically with the waste gas generated during the preparation of sodium hydrosulfide to generate non-toxic and harmless substances. The spray liquid enters the spray liquid delivery pipe 4 through the output end of the water pump 3, and enters the No. 1 spray mechanism 5, No. 2 spray mechanism 6, No. 3 spray mechanism 7 and No. 4 spray mechanism 8 through branch pipes at multiple locations.

[0042] The spray liquid enters the main pipe 51 through the pipeline and is dispersed into multiple branch pipes 52. Then, the spray liquid enters the spray liquid transfer cylinder a1 at the corresponding position through the connecting pipe 53 at the bottom of the main pipe 51 and the branch pipes 52. When the high-speed flowing spray liquid enters the spray liquid transfer cylinder a1, it drives the impeller a4 to rotate, and drives the vertical shaft a12 to rotate through the drive shaft a3 and the rocker arm a5. Since the vertical shaft a12 is fixedly connected by the end cover and the mounting set a6, and the rocker arm a5 is set at an angle, after the spray execution component 554 and the rocker arm a5 are connected, the central axis of the spray execution component 554 forms a 70-degree angle with the horizontal plane. Furthermore, the mounting set a6 and the assembly pipe b2 are detachably fixedly connected, so that the vertical shaft a12 drives the conical cylinder b1 to rotate in an oscillating manner while rotating.

[0043] After entering the spray liquid transfer cylinder a1, the spray liquid flows into the outlet nozzle a10 through the drain nozzle a2 and the second hose a11, and then into the assembly pipe b2 through the outlet nozzle a10 and the through hole a8. The spray liquid is then collected in the upper inner cylinder b4. The spray liquid pushes the conical column b13 downward through the conveying channel at the top of the ring frame b10 and the central through hole of the ring frame b10. The spray liquid flows into the lower inner cylinder b5 through the gap between the conical column b13 and the ring frame b10. Then, the spray liquid enters the spray unit b8 at the corresponding position through multiple first hoses b9.

[0044] As the conical column b13 moves downward, the drive column b15, which is against the outer wall of the conical column b13, is pushed downward and moves away from the conical column b13. The rack b16 drives the gear b83 to rotate, causing the spray holes b84 on the surface of the spray pipe b81 to gradually detach from the dustproof tank b7 from the state of being tightly attached to the inner wall of the dustproof tank b7. This allows the spray liquid to be sprayed into the spray tower 1 through the spray holes b84. In conjunction with the swinging rotation of the conical cylinder b1, the spray liquid continuously changes the spray direction and spray angle while being sprayed. Meanwhile, the baffle b3 continuously disturbs the surrounding exhaust gas and spray liquid during the rotation process, promoting the mixing speed of the spray liquid and the surrounding exhaust gas and accelerating the reaction time of the exhaust gas.

[0045] Some of the unreacted residual waste gas reacts further with the spray liquid located in the packing layer 9 as it passes through the packing layer 9, and is finally discharged through the top of the spray tower 1.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waste gas treatment scrubbing tower for preparing sodium hydrosulfide, comprising a scrubbing tower cylinder and a scrubbing liquid storage tank fixedly installed on its side wall, wherein a water pump is also provided on one side of the scrubbing liquid storage tank, the water pump feeding the scrubbing liquid inside the scrubbing liquid storage tank into the scrubbing tower cylinder through a scrubbing liquid delivery pipe, characterized in that, Also includes: Spraying mechanism No. 1, spraying mechanism No. 2, spraying mechanism No. 3 and spraying mechanism No. 4 are evenly arranged inside the spraying tower from bottom to top. They are used to evenly spray the spraying liquid from the spraying liquid delivery pipe. During the spraying process, the spraying mechanism automatically adjusts its spraying posture using the hydrodynamics of the spraying liquid to increase the distribution range of the spraying liquid. In the process of adjusting the spraying posture, the flow path of the exhaust gas and the spraying liquid is disturbed simultaneously to accelerate the mixing uniformity of the exhaust gas and the spraying liquid. The No. 1 spraying mechanism also includes a main pipe and multiple branch pipes evenly arranged on the main pipe. Multiple connecting pipes are fixedly installed at the bottom of the main pipe and the branch pipes. A lifting frame is also fixedly fitted on the outer wall of the connecting pipe. The bottom of each connecting pipe is connected to a spraying component for increasing the spraying range of the spraying liquid and accelerating the reaction speed between the exhaust gas and the spraying liquid through the lifting frame. Multiple packing layers are evenly arranged inside the spray tower and correspond one-to-one with the positions of the No. 1, No. 2, No. 3, and No. 4 spray mechanisms to further increase the reaction time between the spray liquid and the exhaust gas.

2. The waste gas treatment water scrubbing spray tower for preparing sodium hydrosulfide according to claim 1, characterized in that: The spray assembly includes a mounting frame and a rotating seat fixedly disposed at the bottom of the inner cavity of the mounting frame. An annular stabilizing frame is also fixedly disposed on the inner wall of the mounting frame. An annular groove is formed on the inner wall of the annular stabilizing frame. A spray execution component is movably disposed between the rotating seat and the annular stabilizing frame. The spray execution component is driven by a power conversion component to complete the rotation and swing operation. The power conversion component is disposed above the spray execution component.

3. The waste gas treatment water scrubbing spray tower for preparing sodium hydrosulfide according to claim 2, characterized in that: The power conversion assembly includes a spray liquid transfer cylinder fixedly installed inside the main pipe and a connecting pipe fixedly installed on the top of the spray liquid transfer cylinder. A drain nozzle is fixedly installed on the lower outer wall of the spray liquid transfer cylinder. A drive shaft is rotatably installed inside the spray liquid transfer cylinder via a bracket. An impeller and a rocker arm are fixedly installed at the top and bottom of the drive shaft, respectively. An assembly is installed below the spray liquid transfer cylinder. An annular groove is formed on the outer wall of the assembly. Multiple through holes are evenly formed on the inner wall of the annular groove. A rotating sleeve is rotatably fitted inside the annular groove. A liquid outlet is fixedly installed on the outer wall of the rotating sleeve. The liquid outlet and the drain nozzle are connected by a second flexible hose for inputting the spray liquid in the spray liquid transfer cylinder into the assembly through the drain nozzle, the second flexible hose, the liquid outlet, and the through holes. A vertical shaft is fixedly installed on the top of the assembly via an end cap. A guide post is fixedly installed on the side wall of the vertical shaft. The guide post is slidably installed in an annular groove on the inner wall of the annular stabilizer.

4. The waste gas treatment water scrubbing spray tower for preparing sodium hydrosulfide according to claim 2, characterized in that: The spraying actuator includes a conical cylinder and an assembly pipe fixedly disposed on its top. Multiple baffles are uniformly fixedly disposed around the top of the conical cylinder and the assembly pipe. An upper inner cylinder is also fixedly disposed inside the conical cylinder and its top is sealed to the bottom of the assembly pipe. A lower inner cylinder is fixedly disposed at the bottom of the upper inner cylinder and a ball head is fixedly disposed at the bottom of the lower inner cylinder.

5. The waste gas treatment water scrubbing spray tower for preparing sodium hydrosulfide according to claim 4, characterized in that: Multiple dustproof grooves are evenly distributed on the outer wall of the conical cylinder. A spray unit is rotatably installed inside each dustproof groove. The spray unit is connected to the lower inner cylinder through a first flexible hose to guide the spray liquid in the lower inner cylinder into the spray unit. The multiple spray units are driven by a power component to adjust the spray angle of the spray liquid. The spray unit includes a spray pipe. A hollow shaft communicating with the inside of the spray pipe is fixedly installed at one end. A gear is fixedly sleeved on the outer wall of the hollow shaft. Multiple spray holes are also evenly distributed on the outer wall of the spray pipe.

6. The waste gas treatment water scrubbing spray tower for preparing sodium hydrosulfide according to claim 5, characterized in that: The power assembly includes an annular frame fixedly installed inside the upper inner cylinder. A limit plate is fixedly installed on the top of the annular frame. Multiple conveying channels for the spray liquid are evenly opened on the top of the limit plate. A lifting column is also slidably inserted inside the limit plate. A conical column is fixedly installed at one end of the lifting column below the limit plate, and a spring baffle is fixedly installed at the top of the lifting column. A first spring is slidably sleeved on the outer wall of the lifting column between the spring baffle and the limit plate.

7. The waste gas treatment water scrubbing spray tower for preparing sodium hydrosulfide according to claim 6, characterized in that: The conical surface of the conical column is uniformly provided with drive rod units that correspond one-to-one with the positions of multiple spray units. The multiple drive rod units synchronously drive the multiple spray units to rotate a preset angle by the downward thrust of the conical column.

8. The waste gas treatment water scrubbing spray tower for preparing sodium hydrosulfide according to claim 7, characterized in that: The drive rod unit includes a drive column that slides through the upper inner cylinder in a sealed manner. A rack that meshes with a gear is fixedly installed at one end of the drive column away from the tapered column. A ball bearing is rotatably installed at the other end of the drive column. A spring retaining ring is fixedly sleeved on the outer wall of the drive column. A second spring is slidably sleeved on the outer wall of the drive column between the upper inner cylinder and the spring retaining ring. A limiting post for limiting the downward movement height of the tapered column is fixedly installed at the bottom of the inner cavity of the lower inner cylinder.

9. A method for treating waste gas used in the preparation of sodium hydrosulfide, comprising a water scrubbing spray tower for treating waste gas used in the preparation of sodium hydrosulfide as described in any one of claims 1-8, characterized in that: The method includes the following steps: Step 1: The water pump draws the spray liquid from the spray liquid storage tank and inputs it into the spray liquid delivery pipe. The spray liquid is then delivered to the No. 1 spray mechanism, the No. 2 spray mechanism, the No. 3 spray mechanism, and the No. 4 spray mechanism through multiple branch pipes on the side wall of the spray liquid delivery pipe. Step 2: The spray liquid enters the main pipe through the pipeline and then is distributed into multiple branch pipes. Then, the spray liquid is sprayed out through multiple spray components. The waste gas generated from the preparation of sodium hydrosulfide is input from the bottom of the spray tower. Step 3: While multiple spray components spray the spray liquid, they swing and rotate due to the drive of the spray liquid to increase the distribution range of the spray liquid. The waste gas generated in the preparation of sodium hydrosulfide reacts with the spray liquid in the initial contact and then undergoes a secondary reaction in the packing layer. The purified waste gas is discharged through the top of the spray tower. Step 4: After the exhaust gas treatment is completed, the water pump stops working, and the spray assembly automatically returns to the dustproof state as it loses the drive of the spray liquid.

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