Activated zinc oxide production waste gas treatment device and treatment method

Abstract

The invention belongs to the field of waste gas treatment, and particularly relates to an activated zinc oxide production waste gas treatment device and a treatment method.The activated zinc oxide production waste gas treatment device comprises a treatment tank, a recycling cover is fixedly connected to the top of the treatment tank, a series connection pipe is arranged at the position, close to the bottom, in the treatment tank, and a plurality of gas spraying pipes with downward output ends are fixedly connected to the middle of the series connection pipe; a liquid spraying pipe is arranged below the gas spraying pipe, the output ends of the liquid spraying pipe and the gas spraying pipe are oppositely arranged, a separation box communicated with the series connection pipe is arranged on the outer side of the treatment tank, a demisting baffle plate is installed on the upper portion of the inner side of the treatment tank, and the treatment tank is filled with a proper amount of treatment liquid. The height of the treatment liquid needs to exceed the height of the serial pipe, so that the efficient waste gas treatment function is realized, meanwhile, the waste gas in the treatment tank is ensured to be effectively treated at a constant flow, and the problems of insufficient waste gas treatment and rapid consumption of the treatment liquid are reduced.

Description

Technical Field

[0001] The invention belongs to the field of waste gas treatment, and specifically relates to a device and method for treating waste gas produced by active zinc oxide. Background Art

[0002] Active zinc oxide is a kind of zinc oxide that has undergone special surface treatment. It has a large specific surface area and high chemical activity. It usually appears as white or slightly yellow spherical fine powder. It can be used as a vulcanization activator to improve the smoothness, wear resistance, mechanical strength and anti-aging properties of rubber products.

[0003] A large amount of waste gas will be generated during the production process of activated zinc oxide. The main pollutant in the waste gas is sulfur dioxide, which cannot be discharged directly. A treatment device is required to desulfurize the waste gas.

[0004] In traditional activated zinc oxide production, sulfur dioxide is generally required to be treated in the waste gas, and the treatment method generally uses a spraying method to contact the treatment liquid from top to bottom with the waste gas from bottom to top to complete the removal of sulfur dioxide. However, during the contact process, it is difficult for the waste gas to fully contact with the treatment liquid, resulting in mediocre treatment effect. In addition, the waste gas needs to maintain a constant spray during the treatment process, resulting in a high consumption of the treatment liquid.

[0005] To this end, the present invention provides a device and method for treating waste gas from the production of activated zinc oxide. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is as follows: the present invention is an active zinc oxide production waste gas treatment device, comprising a treatment tank, a recovery cover is fixedly connected to the top of the treatment tank, a series pipe is arranged near the bottom of the treatment tank, a plurality of gas nozzles with output ends facing downward are fixedly connected to the middle of the series pipes, a liquid nozzle is arranged below the gas nozzle, the output ends of the liquid nozzle and the gas nozzle are arranged oppositely, a separation box connected to the series pipe is arranged outside the treatment tank, and a demisting baffle is installed on the upper inner side of the treatment tank; First, fill the treatment tank with an appropriate amount of treatment liquid. The height of the treatment liquid needs to exceed the height of the series pipe. Then the exhaust gas is transmitted to each gas nozzle in equal amounts through the series pipe. The gas nozzle sprays the exhaust gas to the bottom, and the corresponding liquid nozzle also sprays the treatment liquid upward. The exhaust gas and the liquid collide and combine with each other. The treatment liquid can be a common desulfurizer: a limestone aqueous solution. With the collision of the exhaust gas and the treatment liquid, the gas will be dispersed into tiny bubbles, which will form a state similar to an emulsion after mixing with the treatment liquid. The sulfur dioxide in the exhaust gas will react before water to form sulfurous acid. Then the sulfurous acid will react with limestone to form calcium sulfite precipitate, carbon dioxide and water. The calcium sulfite precipitate can further react with oxygen to form a more stable calcium sulfate precipitate, in which oxygen is introduced into the treatment pipe together with the exhaust gas. The generated gas will move upward in the liquid and finally be discharged from the top of the recovery hood. The top of the recovery hood needs to be connected to a negative pressure device for recovery, and the formed precipitate will accumulate on At the bottom of the treatment tank, the precipitate and liquid can be recovered from the bottom at regular intervals. Since the generated by-product contains water, the water content in the limestone aqueous solution can be reduced after the reaction continues for a period of time, and the water in the by-product can be used for the reaction. Through this arrangement, an efficient waste gas treatment function is achieved. However, during the production of activated zinc oxide, the amount of waste gas generated will change according to the progress of the reaction. If the same amount of treatment liquid is always used for treatment, it is easy to cause the treatment liquid to be quickly consumed when the waste gas volume is small, or when the waste gas volume is high, it will cause the waste gas desulfurization effect to be poor. By first passing the waste gas into the separation box, the separation box can detect the emission content of the waste gas. When the emission is low, the waste gas is temporarily stored in the separation box. After a certain amount of waste gas is accumulated, the waste gas is passed into the treatment tank at a certain speed. When the waste gas emission is large, the waste gas is controlled and adjusted to pass into the treatment tank at a constant speed to ensure that the waste gas treatment process is smooth and long-term.

[0008] Preferably, an exhaust pipe is installed at the bottom of one end of the separation box, the bottom of the separation box is inclined, the exhaust pipe is flat, a flow rate measuring instrument is installed in the middle of the exhaust pipe, a circulation pipe is arranged on the outside of the treatment tank, the circulation pipe is connected with the series pipe, a transmission pipe 1 is connected between the exhaust pipe and the circulation pipe, a transmission pipe 2 is connected between the separation box and the circulation pipe, an air pump is installed in both the transmission pipe 2 and the transmission pipe 1, and an air flow valve is arranged at the connection between the exhaust pipe and the separation box. When the exhaust gas starts to be introduced, the air flow valve is in a closed state, and the exhaust gas is directly transported to the circulation pipe and the series pipe through the exhaust pipe and the transmission pipe 1, and is ejected outward through the air nozzle. When the flow rate measuring instrument detects that the exhaust gas flow rate is large, the air flow valve is opened to allow part of the exhaust gas to enter the separation box, and the air pump in the transmission pipe 1 is used to quantitatively transfer the exhaust gas to the air nozzle to ensure constant transportation of the exhaust gas; when the flow rate measuring instrument detects that the exhaust gas flow rate is large, the air flow valve is opened to allow part of the exhaust gas to enter the separation box, and the air pump in the transmission pipe 1 is used to quantitatively transfer the exhaust gas to the air nozzle to ensure constant transportation of the exhaust gas; when the flow rate measuring instrument When it is detected that the exhaust gas flow rate is low, the transmission pipe 1 is closed, and the exhaust gas is first input into the separation box for storage. At the same time, the liquid nozzle in the treatment tank stops working. According to the flow rate detected by the flow rate measuring instrument, the amount of exhaust gas accumulated in the separation box is roughly calculated, and then the air pump in the transmission pipe 2 is started to transport the exhaust gas in the separation box to the air nozzle at a constant speed. Through this setting, it is ensured that the exhaust gas in the treatment tank is always effectively treated at a constant flow rate, reducing the problems of insufficient exhaust gas treatment and rapid consumption of treatment liquid. The inclined separation box allows the particulate matter in the exhaust gas to settle at the bottom under the action of gravity. A recovery door is set at the bottom of the separation box for cleaning particulate matter, which can reduce the blockage of the pipeline by particulate matter. The detection process of the flow rate measuring instrument is to close the air pumps of the transmission pipes 1 and 2 at the same time, and only rely on the influx speed of the exhaust gas for measurement. The detection time is extremely short and will not affect the normal entry of the exhaust gas.

[0009] Preferably, a plurality of filling pipes are installed at the lower part of the interior of the treatment tank, and the plurality of filling pipes are connected to each other. The filling pipes are connected to the liquid nozzles. A transmission valve connected to the filling pipes is provided on the outside of the treatment tank. The external treatment liquid is connected through the transmission valve, and the treatment liquid is delivered to the plurality of liquid nozzles at a constant rate, so that the treatment liquid is impacted and contacted with the exhaust gas obliquely upward, and the airflow is dispersed into small bubbles, thereby ensuring sufficient contact between the exhaust gas and the treatment liquid and ensuring the treatment effect of the exhaust gas.

[0010] Preferably, a rotatable connecting ring is provided above the series pipes, a restraining ring is fixedly connected to the inner wall of the treatment tank, the connecting ring is clamped in the restraining ring, a plurality of vertical baffles are fixedly connected to the middle part of the connecting ring, and there are gaps between adjacent vertical baffles. During the waste gas treatment process, the connecting ring rotates, thereby driving the plurality of vertical baffles to rotate, stirring the accumulated treatment liquid, so that the waste gas can be fully mixed with the accumulated treatment liquid after contacting the injected treatment liquid, and at the same time, the bubbles of the waste gas will be impacted by the vertical baffles when moving upward, thereby crushing into smaller bubbles, further ensuring the full mixing of the waste gas and the treatment liquid.

[0011] Preferably, a side tube is fixedly connected between the transmission valve and the restraining ring, the side tube is tangent to the restraining ring, a flow gap exists between the connecting ring and the restraining ring, the side tube is connected to the flow gap, and the flow gap passes through the interlayer of the processing tank and the filling tube, a plurality of annular wind receiving plates are fixedly connected to the outer side of the connecting ring, the processing liquid is transferred to the gap between the connecting ring and the restraining ring through the side tube, and with the setting of the wind receiving plates, the flow of the processing liquid will push the wind receiving plates and the connecting ring to move, and finally the processing liquid enters the filling tube through the interlayer of the processing tank and is sprayed outward through the liquid nozzle. Through this setting, high-speed rotation of the connecting ring is achieved without the need to set up additional electrical components.

[0012] Preferably, a plurality of hollow holes are provided in the middle of the vertical partition, a partition plate is provided above the restraining ring, a plurality of detection valves are installed on the surface of the partition plate, and a defogger baffle is provided above the partition plate. When the vertical partition impacts the exhaust gas bubbles, the bubbles will pass through the hollow holes. Since the aperture of the hollow holes is small, the pressure exerted on the water flow and the bubbles when passing through is relatively large. According to Bernoulli's theorem, the flow velocity here will become faster, and eventually a Venturi tube-like effect will be formed, so that the bubbles flowing through the hollow holes will be quickly released, and numerous tiny bubbles will be decomposed, further improving the contact effect between the exhaust gas and the treated liquid. A plurality of air flow holes are provided on the surface of the partition plate so that the air flow can pass normally. At the same time, a water level detection module is provided so that when the water level exceeds the partition plate, the discharge speed at the bottom is accelerated to ensure that the water level is below the partition plate. The defogger baffle reduces the liquid in the exhaust air flow and reduces the solution content in the exhaust air flow by contacting the air flow.

[0013] Preferably, a plurality of recovery pipes are fixedly connected to the bottom of the treatment tank, and the ends of the plurality of recovery pipes extend to the outside of the treatment tank. A recovery valve is fixedly connected to the end of the recovery pipe. When the recovery valve is opened, the treatment liquid at the bottom will be discharged outward along the recovery pipe, thereby ensuring that the liquid level inside the treatment tank will not be too high and the sediment at the bottom can be discharged.

[0014] Preferably, the recovery pipe is arranged in an arc shape, and a folding plate is fixedly connected to the inner bottom of the treatment tank, and the folding plate is located above the connection between the recovery pipe and the treatment tank. Under the rotation of the connecting ring, the treatment liquid inside the treatment tank rotates, and the arc direction of the recovery pipe is the same as the rotation direction. In this way, the precipitation generated will gradually gather in the recovery pipe under the action of gravity and inertia. In this way, when the recovery valve is opened, the precipitation can be discharged quickly, reducing the problem of excessive precipitation accumulation. The folding plate is set to assist in transferring the precipitation to the recovery pipe.

[0015] The method is applicable to the above-mentioned activated zinc oxide production waste gas treatment device, and the method is specifically as follows: S1: First, fill the treatment tank with an appropriate amount of treatment liquid. The height of the treatment liquid needs to exceed the height of the series pipe. Then, the exhaust gas is transferred to each air nozzle through the series pipe in equal amounts. The air nozzle sprays the exhaust gas toward the bottom, and the corresponding liquid nozzle also sprays the treatment liquid upward. The exhaust gas and liquid collide with each other and combine; S2: According to the circulation speed of the flow meter, select the appropriate circulation method to allow the treatment tank to treat the waste gas at a constant flow rate. During the waste gas treatment process, the connecting ring rotates, driving multiple vertical partitions to rotate and stir the accumulated treatment liquid. In this way, after the waste gas contacts the injected treatment liquid, it can also be fully mixed with the accumulated treatment liquid. At the same time, when the bubbles of the waste gas move upward, they will be impacted by the vertical partitions, thereby crushing into smaller bubbles, further ensuring the full mixing of the waste gas and the treatment liquid; S3: As the connecting ring rotates, the treatment liquid inside the treatment tank rotates, and the arc direction of the recovery pipe is in the same direction as the rotation direction. The sediment generated will gradually gather in the recovery pipe under the action of gravity and inertia, so that when the recovery valve is opened, the sediment can be quickly discharged.

[0016] The method for rotating the connecting ring in S3 is: Q1: Connect the external processing liquid through the transmission valve, and deliver the processing liquid to multiple liquid nozzles at a constant rate. The processing liquid is transferred to the gap between the connecting ring and the restraining ring through the side pipe, and is discharged after circling one circle; Q2: With the setting of the wind receiving plate, the flow of the treatment liquid will push the connecting ring to move. Finally, the treatment liquid enters the filling pipe through the interlayer of the treatment tank and is sprayed outward through the liquid nozzle. Through this setting, the high-speed rotation of the connecting ring is achieved without the need to set up additional electrical components.

[0017] The beneficial effects of the present invention are as follows: 1. The device and method for treating waste gas produced by active zinc oxide described in the present invention, through the arrangement of air nozzles and liquid nozzles, first fill a proper amount of treating liquid in a treating tank, the height of the treating liquid needs to exceed the height of the series pipes, and then the waste gas is equally transferred to each air nozzle through the series pipes, the air nozzle sprays the waste gas toward the bottom, and at the same time the corresponding liquid nozzle also sprays the treating liquid upward, the waste gas and the liquid collide and combine with each other, and through this arrangement, an efficient waste gas treatment function is achieved.

[0018] 2. The device and method for treating waste gas produced by active zinc oxide described in the present invention temporarily store waste gas in a separation box, and after a certain amount of waste gas has accumulated, pass the waste gas into a treatment tank at a certain speed. When the waste gas emission is large, the waste gas is controlled and adjusted to pass into the treatment tank at a constant speed, thereby ensuring that the waste gas in the treatment tank is effectively treated at a constant flow rate, reducing the problems of insufficient waste gas treatment and rapid consumption of treatment liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 is a stereogram of the present invention; Figure 2 is a cross-sectional view of a treatment tank of the present invention; Figure 3 is a cross-sectional view of the restraining ring of the present invention; Figure 4 is a stereogram of the series pipe of the present invention; Figure 5 is a three-dimensional diagram of a folding plate of the present invention; Figure 6 is a perspective view of a separation box of the present invention; Figure 7 It is a flowchart of the method of the present invention; In the figure: 1. treatment tank; 2. recovery hood; 3. recovery pipe; 4. transmission valve; 5. circulation pipe; 6. recovery valve; 7. separation box; 8. exhaust pipe; 9. transmission pipe one; 10. transmission pipe two; 11. defogger baffle; 12. partition plate; 13. restraining ring; 15. filling pipe; 16. side pipe; 17. vertical partition; 18. hollow hole; 19. connecting ring; 20. wind receiving plate; 21. air nozzle; 22. series pipe; 23. liquid nozzle; 24. folding plate; 25. flow rate measuring instrument. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0022] like Figures 1 to 6As shown, an active zinc oxide production waste gas treatment device according to an embodiment of the present invention comprises a treatment tank 1, a recovery cover 2 is fixedly connected to the top of the treatment tank 1, a series pipe 22 is arranged near the bottom of the treatment tank 1, a plurality of gas nozzles 21 with output ends facing downward are fixedly connected to the middle of the series pipe 22, a liquid nozzle 23 is arranged below the gas nozzle 21, and the liquid nozzle 23 and the output end of the gas nozzle 21 are arranged oppositely, a separation box 7 connected to the series pipe 22 is arranged on the outside of the treatment tank 1, and a demisting baffle 11 is installed on the upper inside of the treatment tank 1; First, fill the treatment tank 1 with an appropriate amount of treatment liquid, the height of the treatment liquid needs to exceed the height of the series pipe 22, and then the exhaust gas is transmitted to each gas nozzle 21 in equal amounts through the series pipe 22. The gas nozzle 21 sprays the exhaust gas toward the bottom, and the corresponding liquid nozzle 23 also sprays the treatment liquid upward, and the exhaust gas and the liquid collide and combine with each other; the treatment liquid can be a common desulfurizer: limestone aqueous solution; with the collision of the exhaust gas and the treatment liquid, the gas will be dispersed into fine bubbles, and after mixing with the treatment liquid, it will form a state similar to an emulsion. The sulfur dioxide in the exhaust gas will react before water to form sulfurous acid, and then the sulfurous acid will react with the limestone to form calcium sulfite precipitation, carbon dioxide and water. The calcium sulfite precipitation can further react with oxygen to form a more stable calcium sulfate precipitation, wherein oxygen is introduced into the treatment pipe 1 together with the exhaust gas, and the generated gas will move upward in the liquid and finally be discharged from the top of the recovery hood 2. The top of the recovery hood 2 needs to be connected to a negative pressure device for recovery, and the precipitation formed, It will accumulate at the bottom of the treatment tank 1, and the precipitation and liquid can be recovered from the bottom at regular intervals; since the generated by-product contains water, the water content in the limestone aqueous solution can be reduced after the reaction continues for a period of time, and the water in the by-product can be used for reaction; through this arrangement, an efficient waste gas treatment function is achieved; however, during the production of activated zinc oxide, the amount of waste gas generated will change according to the progress of the reaction. If the same amount of treatment liquid is always used for treatment, it is easy to cause the treatment liquid to be quickly consumed when the amount of waste gas is small, or when the amount of waste gas is high, it will cause the waste gas desulfurization effect to be poor. By first passing the waste gas into the separation box 7, the separation box 7 can detect the emission content of the waste gas. When the emission is low, the waste gas is temporarily stored through the separation box 7. After a certain amount of waste gas is accumulated, the waste gas is passed into the treatment tank 1 at a certain speed. When the waste gas emission is large, the waste gas is controlled and adjusted to pass into the treatment tank 1 at a constant speed to ensure that the waste gas treatment process is smooth and long-term.

[0023] An exhaust pipe 8 is installed at the bottom of one end of the separation box 7, the bottom of the separation box 7 is inclined, the exhaust pipe 8 is flat, a flow rate measuring instrument 25 is installed in the middle of the exhaust pipe 8, a circulation pipe 5 is arranged on the outside of the treatment tank 1, the circulation pipe 5 is connected with the series pipe 22, a transmission pipe 1 9 is connected between the exhaust pipe 8 and the circulation pipe 5, a transmission pipe 2 10 is connected between the separation box 7 and the circulation pipe 5, and air pumps are installed in the transmission pipe 2 10 and the transmission pipe 1 9; During operation, an air flow valve is provided at the connection between the exhaust pipe 8 and the separation box 7. When the exhaust gas starts to be introduced, the air flow valve is in a closed state, and the exhaust gas is directly transported to the circulation pipe 5 and the series pipe 22 through the exhaust pipe 8 and the transmission pipe 9, and is ejected outward through the air nozzle 21. When the flow rate meter 25 detects that the exhaust gas flow rate is large, the air flow valve is opened to allow part of the exhaust gas to enter the separation box 7, and the air pump in the transmission pipe 9 is used to quantitatively transfer the exhaust gas to the air nozzle 21 to ensure constant delivery of the exhaust gas; when the flow rate meter 25 detects that the exhaust gas flow rate is low, the transmission pipe 9 is closed to allow the exhaust gas to be first input into the separation box 7 for storage, and at the same time the liquid nozzle 23 in the treatment tank 1 stops working, and the separation rate is roughly calculated based on the flow rate detected by the flow rate meter 25. The amount of waste gas that has accumulated in the separation box 7 is then started, and the air pump in the transmission pipe 10 is started to transport the waste gas in the separation box 7 to the air nozzle 21 at a constant speed. Through this arrangement, it is ensured that the waste gas in the treatment tank 1 is always effectively treated at a constant flow rate, reducing the problems of insufficient waste gas treatment and rapid consumption of treatment liquid. The inclined separation box 7 allows the particulate matter in the waste gas to settle at the bottom under the action of gravity. A recovery door is provided at the bottom of the separation box 7 for cleaning the particulate matter, which can reduce the clogging of the pipeline by the particulate matter; the detection process of the flow rate meter 25 is to turn off the air pumps of the transmission pipe 1 9 and the transmission pipe 2 10 at the same time, and only rely on the influx speed of the waste gas for measurement. The detection time is extremely short and will not affect the normal introduction of the waste gas.

[0024] A plurality of filling pipes 15 are installed at the lower part of the processing tank 1. The plurality of filling pipes 15 are connected to each other. The filling pipes 15 are connected to the liquid spray pipe 23. A transfer valve 4 connected to the filling pipe 15 is arranged on the outer side of the processing tank 1. During operation, the external treatment liquid is connected through the transmission valve 4, and the treatment liquid is delivered to multiple liquid nozzles 23 at a constant rate, so that the treatment liquid is impacted and contacted with the exhaust gas obliquely upward, and the airflow is dispersed into small bubbles, thereby ensuring sufficient contact between the exhaust gas and the treatment liquid and ensuring the treatment effect of the exhaust gas.

[0025] A rotatable connecting ring 19 is disposed above the series pipe 22, a restraining ring 13 is fixedly connected to the inner wall of the treatment tank 1, the connecting ring 19 is clamped in the restraining ring 13, a plurality of vertical partitions 17 are fixedly connected to the middle of the connecting ring 19, and there are gaps between adjacent vertical partitions 17; During operation, during the waste gas treatment process, the connecting ring 19 rotates, thereby driving the multiple vertical baffles 17 to rotate, stirring the accumulated treatment liquid, so that the waste gas can be fully mixed with the accumulated treatment liquid after contacting the injected treatment liquid, and at the same time, the bubbles of the waste gas will be impacted by the vertical baffles 17 when moving upward. During the impact, the bubbles flow around the vertical baffles 17, thereby applying greater pressure on the bubbles, thereby crushing the bubbles into smaller bubbles, further ensuring the full mixing of the waste gas and the treatment liquid.

[0026] A side pipe 16 is fixedly connected between the transfer valve 4 and the restraining ring 13, and the side pipe 16 is tangent to the restraining ring 13. There is a flow gap between the connecting ring 19 and the restraining ring 13. The side pipe 16 is connected to the flow gap, and the flow gap passes through the interlayer of the processing tank 1 and the filling pipe 15. A plurality of annular wind receiving plates 20 are fixedly connected to the outer side of the connecting ring 19. During operation, the treatment liquid is transferred to the gap between the connecting ring 19 and the restraining ring 13 through the side tube 16. Combined with the setting of the wind receiving plate 20, the flow of the treatment liquid will push the wind receiving plate 20 and the connecting ring 19 to move. Finally, the treatment liquid enters the filling tube 15 through the interlayer of the treatment tank 1 and is sprayed outward through the liquid nozzle 23. Through this setting, the high-speed rotation of the connecting ring 19 is achieved without the need to set up additional electrical components.

[0027] A plurality of hollow holes 18 are provided in the middle of the vertical partition 17, a partition plate 12 is provided above the restraining ring 13, a plurality of detection valves are installed on the surface of the partition plate 12, and a demisting baffle plate 11 is provided above the partition plate 12; During operation, when the vertical partition 17 impacts the exhaust gas bubbles, the bubbles will pass through the hollow hole 18. Since the hollow hole 18 has a small aperture, the water flow and the bubbles are subjected to greater pressure when passing through. From Bernoulli's theorem, it can be seen that the flow rate here will become faster, and eventually a Venturi tube-like effect will be formed, allowing the bubbles flowing through the hollow hole 18 to be quickly released, decomposing numerous tiny bubbles, further improving the contact effect between the exhaust gas and the treated liquid. A plurality of air flow holes are provided on the surface of the partition plate 12 to allow the air flow to pass normally. At the same time, a water level detection module is provided to accelerate the discharge speed at the bottom when the water level exceeds the partition plate 12 to ensure that the water level is below the partition plate 12. The defogger deflector 11 reduces the liquid in the exhaust air flow and reduces the solution content in the exhaust air flow by contacting the air flow.

[0028] A plurality of recovery pipes 3 are fixedly connected to the bottom of the treatment tank 1, and the ends of the plurality of recovery pipes 3 extend to the outside of the treatment tank 1. A recovery valve 6 is fixedly connected to the end of the recovery pipe 3. During operation, the recovery valve 6 is opened, and the processing liquid at the bottom will be discharged outward along the recovery pipe 3, ensuring that the liquid level inside the processing tank 1 will not be too high, and the sediment at the bottom can also be discharged.

[0029] The recovery pipe 3 is arranged in an arc shape, and a folding plate 24 is fixedly connected to the inner bottom of the treatment tank 1, and the folding plate 24 is located above the connection between the recovery pipe 3 and the treatment tank 1; During operation, the treatment liquid inside the treatment tank 1 rotates under the rotation of the connecting ring 19, and the curvature of the recovery pipe 3 is in the same direction as the rotation direction. The sediment generated will gradually gather in the recovery pipe 3 under the action of gravity and inertia. In this way, when the recovery valve 6 is opened, the sediment can be quickly discharged to reduce the problem of excessive sediment accumulation. The folding plate 24 is set to assist in transferring the sediment to the recovery pipe 3.

[0030] A method for treating waste gas from the production of activated zinc oxide, which is applicable to the above-mentioned waste gas treatment device for the production of activated zinc oxide, is specifically: S1: First, fill the treatment tank 1 with an appropriate amount of treatment liquid. The height of the treatment liquid needs to exceed the height of the series pipe 22. Then, the exhaust gas is transmitted to each gas nozzle 21 in equal amounts through the series pipe 22. The gas nozzle 21 sprays the exhaust gas toward the bottom. At the same time, the corresponding liquid nozzle 23 also sprays the treatment liquid upward. The exhaust gas and the liquid collide with each other and combine. S2: According to the circulation speed of the flow rate measuring instrument 25, a suitable circulation method is selected to allow the waste gas in the treatment tank 1 to be treated at a constant flow rate. During the waste gas treatment process, the connecting ring 19 rotates, driving the multiple vertical partitions 17 to rotate, stirring the accumulated treatment liquid, so that the waste gas can be fully mixed with the accumulated treatment liquid after contacting the injected treatment liquid. At the same time, when the bubbles of the waste gas move upward, they will be impacted by the vertical partitions 17, thereby crushing into smaller bubbles, further ensuring the full mixing of the waste gas and the treatment liquid; S3: With the rotation of the connecting ring 19, the treatment liquid inside the treatment tank 1 rotates, and the curvature of the recovery pipe 3 is in the same direction as the rotation direction. The precipitate generated will gradually gather in the recovery pipe 3 under the action of gravity and inertia, so that when the recovery valve 6 is opened, the precipitate can be quickly discharged.

[0031] The method for rotating the connecting ring 19 in S2 is: Q1: The external treatment liquid is connected through the transmission valve 4, and the treatment liquid is delivered to the multiple liquid nozzles 23 at a constant rate. The treatment liquid is transferred to the gap between the connecting ring 19 and the restraining ring 13 through the side pipe 16, and is discharged after a circle; Q2: With the setting of the wind receiving plate 20, the flow of the treatment liquid will push the connecting ring 19 to move, and finally the treatment liquid enters the filling tube 15 through the interlayer of the treatment tank 1, and is sprayed outward through the liquid nozzle 23. Through this setting, the high-speed rotation of the connecting ring 19 is achieved without the need to set up additional electrical components.

[0032] During operation, first fill the treatment tank 1 with an appropriate amount of treatment liquid, the height of the treatment liquid needs to exceed the height of the series pipe 22, and then the exhaust gas is transmitted to each gas nozzle 21 in equal amounts through the series pipe 22, and the gas nozzle 21 sprays the exhaust gas toward the bottom, and at the same time, the corresponding liquid nozzle 23 also sprays the treatment liquid upward, and the exhaust gas and the liquid collide and combine with each other; the treatment liquid can be a common desulfurizer: a limestone aqueous solution; as the exhaust gas and the treatment liquid collide, the gas will be dispersed into fine bubbles, and after mixing with the treatment liquid, it will form a state similar to an emulsion, and the sulfur dioxide in the exhaust gas will react before water to form sulfurous acid, and then the sulfurous acid will react with the limestone to form calcium sulfite precipitate, carbon dioxide and water. The calcium sulfite precipitate can further react with oxygen to form a more stable calcium sulfate precipitate, wherein oxygen is introduced into the treatment pipe 1 together with the exhaust gas, and the generated gas will move upward in the liquid and finally be discharged from the top of the recovery hood 2. The top of the recovery hood 2 needs to be connected to a negative pressure device for recovery, and the precipitation formed The precipitate will accumulate at the bottom of the treatment tank 1, and the precipitate and liquid can be recovered from the bottom at regular intervals; since the generated by-product contains water, the water content in the limestone aqueous solution can be reduced after the reaction continues for a period of time, and the water in the by-product can be used for reaction; through this arrangement, an efficient waste gas treatment function is achieved; however, during the production of active zinc oxide, the amount of waste gas generated will change according to the progress of the reaction. If the same amount of treatment liquid is always used for treatment, it is easy to cause the treatment liquid to be quickly consumed when the amount of waste gas is small, or when the amount of waste gas is high, it will cause the problem of poor waste gas desulfurization effect. By first passing the waste gas into the separation box 7, the separation box 7 can detect the emission content of the waste gas. When the emission is low, the waste gas is temporarily stored through the separation box 7. After a certain amount of waste gas is accumulated, the waste gas is passed into the treatment tank 1 at a certain speed. When the waste gas emission is large, the waste gas is controlled and adjusted to pass into the treatment tank 1 at a constant speed to ensure that the waste gas treatment process is smooth and long-term; An air flow valve is provided at the connection between the exhaust pipe 8 and the separation box 7. When the exhaust gas starts to be introduced, the air flow valve is in a closed state, and the exhaust gas is directly transported to the circulation pipe 5 and the series pipe 22 through the exhaust pipe 8 and the transmission pipe 9, and is ejected outward through the air nozzle 21. When the flow rate meter 25 detects that the exhaust gas flow rate is large, the air flow valve is opened to allow part of the exhaust gas to enter the separation box 7, and the air pump in the transmission pipe 9 is used to quantitatively transfer the exhaust gas to the air nozzle 21 to ensure constant delivery of the exhaust gas; when the flow rate meter 25 detects that the exhaust gas flow rate is low, the transmission pipe 9 is closed to allow the exhaust gas to be first input into the separation box 7 for storage, and at the same time the liquid nozzle 23 in the treatment tank 1 stops working. According to the flow rate detected by the flow rate meter 25, the separation box is roughly calculated. 7, and then start the air pump in the transmission pipe 2 10 to transport the waste gas in the separation box 7 to the air nozzle 21 at a constant speed. Through this arrangement, it is ensured that the waste gas in the treatment tank 1 is effectively treated at a constant flow rate, reducing the problems of insufficient waste gas treatment and rapid consumption of treatment liquid. The inclined separation box 7 allows the particles in the waste gas to settle at the bottom under the action of gravity. A recovery door is provided at the bottom of the separation box 7 for cleaning the particles, which can reduce the clogging of the pipeline by the particles. The detection process of the flow rate meter 25 is to turn off the air pumps of the transmission pipe 1 9 and the transmission pipe 2 10 at the same time, and only rely on the influx speed of the waste gas for measurement. The detection time is extremely short and will not affect the normal entry of the waste gas. The external treatment liquid is connected through the transmission valve 4, and the treatment liquid is delivered to the multiple liquid nozzles 23 at a constant rate, so that the treatment liquid is obliquely upward to impact and contact the exhaust gas, and the air flow is dispersed into fine bubbles, ensuring that the exhaust gas and the treatment liquid are fully in contact, and ensuring the treatment effect of the exhaust gas; During the waste gas treatment process, the connecting ring 19 rotates, thereby driving the multiple vertical partitions 17 to rotate and stir the accumulated treatment liquid, so that the waste gas can be fully mixed with the accumulated treatment liquid after contacting the injected treatment liquid. At the same time, when the bubbles of the waste gas move upward, they will be impacted by the vertical partitions 17, thereby crushing them into smaller bubbles, further ensuring the full mixing of the waste gas and the treatment liquid. The treatment liquid is transferred to the gap between the connecting ring 19 and the restraining ring 13 through the side pipe 16. With the arrangement of the wind receiving plate 20, the flow of the treatment liquid will push the wind receiving plate 20 and the connecting ring 19 to move. Finally, the treatment liquid enters the filling pipe 15 through the interlayer of the treatment tank 1 and is sprayed outward through the liquid nozzle 23. Through this arrangement, the high-speed rotation of the connecting ring 19 is realized without the need to set up additional electrical components. When the vertical partition 17 impacts the exhaust gas bubbles, the bubbles will pass through the hollow hole 18. Since the hollow hole 18 has a small aperture, the water flow and the bubbles are subjected to a greater pressure when passing through. According to Bernoulli's theorem, the flow rate here will become faster, and eventually a Venturi tube-like effect will be formed, allowing the bubbles flowing through the hollow hole 18 to be quickly released, decomposing numerous small bubbles, further improving the contact effect between the exhaust gas and the treatment liquid. A plurality of air flow holes are provided on the surface of the partition plate 12 to allow the air flow to pass normally. At the same time, a water level detection module is provided to accelerate the discharge speed at the bottom when the water level exceeds the partition plate 12, so as to ensure that the water level is below the partition plate 12. The demisting baffle 11 reduces the liquid in the exhaust air flow and reduces the solution content in the exhaust air flow by contacting the air flow. When the recovery valve 6 is opened, the treatment liquid at the bottom will be discharged outward along the recovery pipe 3, ensuring that the liquid level inside the treatment tank 1 will not be too high and the sediment at the bottom can be discharged; As the connecting ring 19 rotates, the treatment liquid inside the treatment tank 1 rotates, and the curvature of the recovery pipe 3 is in the same direction as the rotation direction. The sediment generated will gradually gather in the recovery pipe 3 under the action of gravity and inertia. In this way, when the recovery valve 6 is opened, the sediment can be quickly discharged to reduce the problem of excessive sediment accumulation. The folding plate 24 is set to assist in transferring the sediment to the recovery pipe 3.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An activated zinc oxide production waste gas treatment device, characterized in that: It includes a processing tank, the top of which is fixedly connected to a recovery hood, a series pipe is arranged inside the processing tank near the bottom, a plurality of gas nozzles with output ends facing downward are fixedly connected to the middle of the series pipes, a liquid nozzle is arranged below the gas nozzles, the output ends of the liquid nozzles and the gas nozzles are arranged opposite to each other, a separation box connected to the series pipe is arranged on the outside of the processing tank, and a demisting baffle is installed on the upper inside of the processing tank.

2. The device for treating waste gas from the production of activated zinc oxide according to claim 1, characterized in that: An exhaust pipe is installed at the bottom of one end of the separation box, the bottom of the separation box is inclined, the exhaust pipe is flat, a flow rate measuring instrument is installed in the middle of the exhaust pipe, a circulation pipe is arranged on the outside of the treatment tank, the circulation pipe is connected with the series pipe, a transmission pipe 1 is connected between the exhaust pipe and the circulation pipe, a transmission pipe 2 is connected between the separation box and the circulation pipe, and air pumps are installed in both the transmission pipe 2 and the transmission pipe 1.

3. The activated zinc oxide production waste gas treatment device according to claim 2, characterized in that: A plurality of filling pipes are installed at the lower part of the processing tank, the plurality of filling pipes are connected to each other, the filling pipes are connected to the liquid spray pipe, and a transmission valve connected to the filling pipe is arranged on the outer side of the processing tank.

4. The device for treating waste gas from the production of activated zinc oxide according to claim 3, characterized in that: A rotatable connecting ring is arranged above the series pipes, a restraining ring is fixedly connected to the inner wall of the processing tank, the connecting ring is clamped in the restraining ring, a plurality of vertical partitions are fixedly connected to the middle of the connecting ring, and gaps exist between adjacent vertical partitions.

5. The device for treating waste gas from the production of activated zinc oxide according to claim 4, characterized in that: A side tube is fixedly connected between the transmission valve and the restraining ring, the side tube is tangent to the restraining ring, a flow gap exists between the connecting ring and the restraining ring, the side tube is connected to the flow gap, and the flow gap passes through the interlayer of the processing tank and the filling tube, and a plurality of annular wind receiving plates are fixedly connected to the outer side of the connecting ring.

6. The device for treating waste gas from the production of activated zinc oxide according to claim 5, characterized in that: A plurality of hollow holes are opened in the middle of the vertical partition plate, a partition plate is arranged above the restraining ring, a plurality of detection valves are installed on the surface of the partition plate, and a demisting baffle plate is arranged above the partition plate.

7. The device for treating waste gas from the production of activated zinc oxide according to claim 6, characterized in that: A plurality of recovery pipes are fixedly connected to the bottom of the processing tank, ends of the plurality of recovery pipes extend to the outside of the processing tank, and recovery valves are fixedly connected to the ends of the recovery pipes.

8. The device for treating waste gas from the production of activated zinc oxide according to claim 7, characterized in that: The recovery pipe is arranged in an arc shape, and a folding plate is fixedly connected to the inner bottom of the processing tank, and the folding plate is located above the connection between the recovery pipe and the processing tank.

9. A method for treating waste gas from the production of activated zinc oxide, characterized in that: The method is applicable to an activated zinc oxide production waste gas treatment device as described in any one of claims 1 to 8 above, and the method is specifically: S1: First, fill the treatment tank with an appropriate amount of treatment liquid. The height of the treatment liquid needs to exceed the height of the series pipe. Then, the exhaust gas is transferred to each air nozzle through the series pipe in equal amounts. The air nozzle sprays the exhaust gas toward the bottom, and the corresponding liquid nozzle also sprays the treatment liquid upward. The exhaust gas and liquid collide with each other and combine; S2: According to the circulation speed of the flow meter, select the appropriate circulation method to allow the treatment tank to treat the waste gas at a constant flow rate. During the waste gas treatment process, the connecting ring rotates, driving multiple vertical partitions to rotate and stir the accumulated treatment liquid. In this way, after the waste gas contacts the injected treatment liquid, it can also be fully mixed with the accumulated treatment liquid. At the same time, when the bubbles of the waste gas move upward, they will be impacted by the vertical partitions, thereby crushing into smaller bubbles, further ensuring the full mixing of the waste gas and the treatment liquid; S3: As the connecting ring rotates, the treatment liquid inside the treatment tank rotates, and the arc direction of the recovery pipe is in the same direction as the rotation direction. The sediment generated will gradually gather in the recovery pipe under the action of gravity and inertia, so that when the recovery valve is opened, the sediment can be quickly discharged.

10. The method for treating waste gas from the production of activated zinc oxide according to claim 9, characterized in that: The method for rotating the connecting ring in S is: Q1: Connect the external processing liquid through the transmission valve, and deliver the processing liquid to multiple liquid nozzles at a constant rate. The processing liquid is transferred to the gap between the connecting ring and the restraining ring through the side pipe, and is discharged after circling one circle; Q2: With the setting of the wind receiving plate, the flow of the treatment liquid will push the connecting ring to move. Finally, the treatment liquid enters the filling pipe through the interlayer of the treatment tank and is sprayed outward through the liquid nozzle. Through this setting, the high-speed rotation of the connecting ring is achieved without the need to set up additional electrical components.

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