Acetic anhydride production waste gas neutralization treatment equipment and method

Abstract

The invention discloses an acetic anhydride production waste gas neutralization treatment device and method, and relates to the technical field of waste gas neutralization treatment.The acetic anhydride production waste gas neutralization treatment device comprises a treatment tank, a gas inlet pipe is fixedly installed at the bottom of the treatment tank, gas holes are formed in the surface of the gas inlet pipe, and a gas outlet pipe is fixedly installed at the top of the treatment tank; the waste gas neutralizing device is arranged in the treatment tank, and the waste gas neutralizing device comprises a motor, a connecting pipe, a fixing frame, a water spraying pipe, a reciprocating screw rod, a threaded plate, a fixing rod, an elastic telescopic rod, an activated carbon plate, a long rod, a universal wheel and an elastic telescopic scraper plate; the reciprocating lead screw rotates to drive the elastic telescopic rod to rotate, the elastic telescopic rod rotates to drive the activated carbon plate to rotate, through rotation of the activated carbon plate, the plate face can make uniform contact with pollutants in waste gas, saturation and aging of a local area are avoided, and the adsorption efficiency of activated carbon is improved.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas neutralization treatment, and in particular to a device and method for neutralization treatment of waste gas from acetic anhydride production. Background Art

[0002] The production process of acetic anhydride may generate waste gas containing acetic acid, acetic anhydride and other organic compounds. If these waste gases are discharged directly without treatment, they will pollute the air quality and the surrounding environment. The waste gas generated in the production process of acetic anhydride usually requires corresponding treatment measures to ensure the health and safety of workers and protect the environment.

[0003] The patent with patent announcement number CN217725116U relates to a reaction tank acid-base waste gas neutralization treatment equipment, including: a purification body, the purification body includes an outer tank; a spray frame, the surface of the outer tank is fixedly connected to the spray frame, the spray frame includes a water pump, the surface of the water pump is fixedly connected to a water tank, the surface of the water pump is fixedly connected to a water guide pipe, the surface of the water guide pipe is movably connected to a nozzle, the surface of the nozzle is rotatably connected to a water guide paddle, the surface of the nozzle is rotatably connected to a water guide paddle. This patent connects the water guide pipe and the nozzle. When the washing liquid is introduced through the water guide pipe and comes into contact with the nozzle, the washing liquid is accelerated so that it is scattered in an umbrella shape under the high-speed rotation of the water guide paddle. The washing liquid is first sprayed upward and then falls naturally by gravity, so that the washing liquid can neutralize the exhaust gas twice, thereby improving the purification effect of the device.

[0004] In the above patent, through the connection between the water pipe and the nozzle, when the washing liquid is introduced through the water pipe and comes into contact with the nozzle, the washing liquid is accelerated so that it is scattered in an umbrella form under the high-speed rotation of the water-guiding paddle. The washing liquid is first sprayed upward and then falls naturally by gravity, so that the washing liquid can neutralize the exhaust gas twice, thereby improving the purification effect of the device. However, part of the exhaust gas will flow upward and concentrate on the top of the tank. Continuous accumulation may affect the neutralization effect. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a device and method for neutralizing waste gas from acetic anhydride production, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: an acetic anhydride production waste gas neutralization treatment equipment, comprising: a treatment tank, an air inlet pipe is fixedly installed at the bottom of the treatment tank, air holes are opened on the surface of the air inlet pipe, and an air outlet pipe is fixedly installed on the top of the treatment tank; a waste gas neutralization device, the waste gas neutralization device is arranged inside the treatment tank, the waste gas neutralization device comprises a motor, a connecting pipe, a fixing frame, a water spray pipe, a reciprocating screw rod, a threaded plate, a fixing rod, an elastic telescopic rod, an activated carbon plate, a long rod, a universal wheel and an elastic telescopic scraper, the reciprocating screw rod is driven to rotate by the rotation of the motor, the reciprocating screw rod is driven to rotate by the rotation of the reciprocating screw rod, the elastic telescopic rod is driven to rotate by the rotation of the elastic telescopic rod, and the activated carbon plate is driven to rotate by the rotation of the elastic telescopic rod, the motor is fixedly installed on the top of the treatment tank, the fixing frame is fixedly installed on the inner wall of the treatment tank, and the spray pipe is installed on the inner wall of the treatment tank. The water pipe is arranged inside the fixed frame, the connecting pipe is fixedly installed on the surface of the water spray pipe, a spray tank is arranged on the end of the connecting pipe away from the water spray pipe, the reciprocating screw is fixedly installed on the output end of the motor, the threaded plate is threadedly installed on the circumferential surface of the reciprocating screw, the fixed rod is fixedly installed on the top of the inner wall of the treatment tank, the fixed rod passes through the surface of the threaded plate, the elastic telescopic rod is fixedly installed on the bottom of the reciprocating screw, the activated carbon plate is fixedly installed on the free end of the elastic telescopic rod, the long rod is fixedly installed on the bottom of the threaded plate, the universal wheel is fixedly installed on the bottom of the long rod, the elastic telescopic scraper is fixedly installed on the inner wall of the treatment tank, the up and down reciprocating motion of the threaded plate will drive the long rod to reciprocate up and down, the up and down reciprocating motion of the long rod will drive the universal wheel to reciprocate up and down, and when the universal wheel moves downward, it will push the activated carbon plate to move downward.

[0007] According to the above technical solution, the universal wheel is arranged above the activated carbon plate, and the activated carbon plate is pushed downward by the universal wheel to prevent the activated carbon plate from rotating. The universal wheel causes wear to the activated carbon plate, and the elastic retractable scraper is arranged below the activated carbon plate, and the activated carbon plate is scraped by the elastic retractable scraper.

[0008] According to the above technical solution, a spraying device for increasing the spraying range is arranged on the fixed frame, a wastewater recovery device is arranged under the spraying device, the spraying device includes a water inlet, a nozzle, a sliding push rod and a rotating plate, the downward movement of the activated carbon plate will push the sliding push rod to move downward, the downward movement of the sliding push rod will push the rotating plate to rotate downward, the downward rotation of the rotating plate will change the spraying range of the nozzle, the water inlet is fixedly installed on the surface of the water spray pipe, the nozzle is fixedly installed at one end of the water inlet away from the water spray pipe, the sliding push rod is slidably installed on the inner wall of the treatment tank, and the rotating plate is rotatably installed on the inner wall of the fixed frame.

[0009] According to the above technical solution, a sliding frame is slidably installed on the inner wall of the fixed frame, a sliding seat is slidably installed on the bottom of the inner wall of the fixed frame, a rotating plate is rotatably installed on the inner wall of the sliding frame, one end of the rotating plate away from the sliding frame is rotatably installed on the inner wall of the sliding seat, and a push plate is fixedly installed on the surface of the sliding seat, and the movement of the sliding seat in the direction away from the nozzle will drive the push plate to move in the direction away from the nozzle.

[0010] According to the above technical solution, a No. 1 torsion spring is arranged between the rotating plate and the fixed frame, and the rotating plate is reset by the No. 1 torsion spring. A No. 1 spring is arranged between the fixed frame and the sliding frame, and the sliding frame is reset by the No. 1 spring. A No. 2 spring is arranged between the fixed frame and the sliding seat, and the sliding seat is reset by the No. 2 spring.

[0011] According to the above technical solution, the wastewater recovery device includes a connecting plate, a sliding rod, a circular plate, a reset spring and a baffle. The connecting plate is driven downward by the downward movement of the sliding frame. The downward movement of the connecting plate will push the circular plate to move downward. The downward movement of the circular plate will drive the baffle to move downward. The connecting plate is fixedly installed at the bottom of the sliding frame, the sliding rod slides through the top of the air intake pipe, the circular plate is fixedly installed on the top of the sliding rod, the reset spring is sleeved on the surface of the sliding rod, the baffle is fixedly installed at the bottom of the circular plate, and an air outlet is opened on the surface of the baffle.

[0012] According to the above technical solution, an L-shaped rod is fixedly installed on the bottom of the baffle, a guide frame is fixedly installed on the inner wall of the treatment tank, a water outlet hole is opened on the surface of the guide frame, a water outlet is opened on the bottom of the guide frame, an elastic telescopic connecting rod is fixedly installed on the top of the inner wall of the guide frame, a fixing plate is fixedly installed on the free end of the elastic telescopic connecting rod, a sealing plate is fixedly installed on the top of the fixing plate, and the end of the L-shaped rod away from the baffle is fixedly installed on the top of the sealing plate. When the baffle moves downward, it will drive the L-shaped rod to move downward. The downward movement of the L-shaped rod will push the sealing plate to move downward. The downward movement of the sealing plate will disengage the seal on the water outlet, allowing a small amount of spray liquid to flow out through the water outlet.

[0013] According to the above technical solution, the sealing plate is arranged below the water outlet. By moving the sealing plate downward, the water outlet can be opened to discharge the spray liquid, thereby preventing the spray liquid from accumulating too high and flowing into the intake pipe, thereby affecting the subsequent exhaust gas entry. The sealing plate is in contact with the surface of the water outlet, thereby blocking the spray liquid from being lost.

[0014] A method for using a neutralization treatment device for waste gas from acetic anhydride production, comprising the following steps: Step 1: Inject the waste gas into the treatment tank through the air inlet pipe, and neutralize the waste gas through the spray tank, connecting pipe and water spray pipe to remove harmful components and prevent the waste gas from causing harm to the environment and human health; Step 2: The reciprocating screw is driven to rotate by the rotation of the motor, the reciprocating screw is driven to rotate by the rotation of the elastic telescopic rod, and the rotation of the elastic telescopic rod is driven to rotate the activated carbon plate. The activated carbon plate is rotated so that the plate surface can be evenly contacted with the pollutants in the exhaust gas, avoiding saturation and aging of local areas and improving the adsorption efficiency of the activated carbon. Step 3: The reciprocating screw drives the threaded plate to move up and down during rotation, and the up and down reciprocating motion of the threaded plate drives the long rod to move up and down, and the up and down reciprocating motion of the long rod drives the universal wheel to move up and down. When the universal wheel moves downward, it pushes the activated carbon plate to move downward. The activated carbon plate moves downward and rotates at the same time, which helps to improve the contact efficiency between the airflow and the activated carbon surface. This dynamic movement can increase the contact time between the exhaust gas and the activated carbon, thereby improving the adsorption rate; Step 4: When the activated carbon plate moves downward, it contacts the elastic retractable scraper. The free end of the elastic retractable scraper scrapes off the impurities attached to the activated carbon plate to prevent the impurities from affecting the adsorption effect of the activated carbon plate.

[0015] The present invention provides a device and method for neutralizing waste gas from acetic anhydride production, which has the following beneficial effects: (1) The invention drives the reciprocating screw to rotate by the rotation of the motor, and the rotation of the reciprocating screw drives the rotation of the elastic telescopic rod, and the rotation of the elastic telescopic rod drives the rotation of the activated carbon plate. The rotation of the activated carbon plate can make the plate surface evenly contact the pollutants in the exhaust gas, avoid saturation and aging of local areas, and improve the adsorption efficiency of the activated carbon. The activation carbon plate moves downward and rotates at the same time, which helps to improve the contact efficiency between the airflow and the surface of the activated carbon. This dynamic movement mode can increase the contact time between the exhaust gas and the activated carbon, thereby improving the adsorption rate. When the activated carbon plate moves downward, it will contact the elastic telescopic scraper. The free end of the elastic telescopic scraper will scrape off the impurities attached to the activated carbon plate to prevent the impurities from affecting the adsorption effect of the activated carbon plate.

[0016] (2) In the present invention, the downward movement of the activated carbon plate will drive the sliding push rod to move downward, and the downward movement of the sliding push rod will drive the rotating plate to rotate downward. The downward rotation of the rotating plate will change the spraying range of the nozzle. By increasing the spraying range of the nozzle, more exhaust gas can be brought into contact with the neutralizing liquid, thereby improving the absorption of pollutants in the exhaust gas and the neutralization reaction efficiency, and improving the neutralization effect. At the same time, the push plate moves away from the nozzle to push away impurities accumulated at the nozzle mouth, thereby preventing a large amount of impurities from accumulating in front of the nozzle and affecting the spraying range of the nozzle.

[0017] (3) In the present invention, the downward movement of the circular plate will drive the baffle plate to move downward. The downward movement of the baffle plate will block the air holes on the surface of the air inlet pipe, preventing the spray liquid from directly entering the interior of the air inlet pipe through the air holes when the spraying range is increased, causing the spray liquid to accumulate in the air inlet pipe, affecting the subsequent spraying effect. At the same time, the downward movement of the baffle plate will drive the L-shaped rod to move downward. The downward movement of the L-shaped rod will push the sealing plate to move downward. The downward movement of the sealing plate will disengage the seal on the water outlet, causing a small amount of spray liquid to flow out through the water outlet, preventing a large amount of spray liquid from accumulating on the guide frame, causing the subsequent spray liquid to enter the air inlet air hole and affecting the neutralization efficiency. The spray liquid accumulated on the guide frame can always be used to neutralize the exhaust gas, thereby improving the utilization efficiency of the spray liquid and preventing it from being discharged after spraying, resulting in a waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 3 It is a schematic diagram of the position structure of the water spray pipe and the fixing frame of the present invention; Figure 4 This is a schematic diagram of the structure of the exhaust gas neutralization device of the present invention; Figure 5 For the present invention Figure 4 A schematic diagram of the structure enlargement of part A; Figure 6 It is a schematic diagram of the cross-sectional structure of the air intake pipe of the present invention; Figure 7 It is a schematic diagram of the cross-sectional structure of the guide frame of the present invention.

[0019] In the figure: 1, treatment tank; 2, air inlet pipe; 3, air outlet pipe; 4, motor; 5, connecting pipe; 6, water spray pipe; 7, reciprocating screw; 8, threaded plate; 9, fixed rod; 10, elastic telescopic rod; 11, activated carbon plate; 12, long rod; 13, universal wheel; 14, elastic telescopic scraper; 151, fixed frame; 152, water inlet; 153, nozzle; 154, sliding push rod; 155, rotating plate; 156, sliding frame; 157, rotating plate; 158, sliding seat; 159, push plate; 161, connecting plate; 162, sliding rod; 163, round plate; 164, reset spring; 165, baffle; 166, L-shaped rod; 167, guide frame; 168, elastic telescopic connecting rod; 169, fixed plate; 1610, sealing plate. DETAILED DESCRIPTION

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

[0021] See also Figure 1-Figure 3 An embodiment of the present invention is: a neutralization treatment device for waste gas from acetic anhydride production, comprising: a treatment tank 1, an air inlet pipe 2 is fixedly installed at the bottom of the treatment tank 1, air holes are opened on the surface of the air inlet pipe 2, and an air outlet pipe 3 is fixedly installed on the top of the treatment tank 1; a waste gas neutralization device, the waste gas neutralization device is arranged inside the treatment tank 1, the waste gas neutralization device comprises a motor 4, a connecting pipe 5, a fixing frame 151, a water spray pipe 6, a reciprocating screw rod 7, a threaded plate 8, a fixing rod 9, an elastic telescopic rod 10, an activated carbon plate 11, a long rod 12, a universal wheel 13 and an elastic telescopic scraper 14, through the rotation of the activated carbon plate 11, the plate surface can be evenly contacted with pollutants in the waste gas, saturation and aging of local areas can be avoided, and the adsorption efficiency of the activated carbon can be improved. The motor 4 is fixedly installed on the top of the treatment tank 1, the fixing frame 151 is fixedly installed on the inner wall of the treatment tank 1, and the water spray pipe 6 is arranged on Inside the fixed frame 151, the connecting pipe 5 is fixedly mounted on the surface of the water spray pipe 6, and a spray tank is provided at the end of the connecting pipe 5 away from the water spray pipe 6. The reciprocating screw 7 is fixedly mounted on the output end of the motor 4, and the threaded plate 8 is threadedly mounted on the circumferential surface of the reciprocating screw 7. The fixed rod 9 is fixedly mounted on the top of the inner wall of the treatment tank 1, and the fixed rod 9 penetrates the surface of the threaded plate 8. The elastic telescopic rod 10 is fixedly mounted on the bottom of the reciprocating screw 7, the activated carbon plate 11 is fixedly mounted on the free end of the elastic telescopic rod 10, the long rod 12 is fixedly mounted on the bottom of the threaded plate 8, the universal wheel 13 is fixedly mounted on the bottom of the long rod 12, and the elastic telescopic scraper 14 is fixedly mounted on the inner wall of the treatment tank 1. The activated carbon plate 11 moves downward and rotates at the same time, which helps to improve the contact efficiency between the airflow and the activated carbon surface. This dynamic movement mode can increase the contact time between the exhaust gas and the activated carbon, thereby improving the adsorption rate.

[0022] The universal wheel 13 is arranged above the activated carbon plate 11. The universal wheel 13 pushes the activated carbon plate 11 downward to prevent the activated carbon plate 11 from rotating. The universal wheel 13 causes wear to the activated carbon plate 11. The elastic retractable scraper 14 is arranged below the activated carbon plate 11. The elastic retractable scraper 14 is used to scrape the activated carbon plate 11.

[0023] A method for using a neutralization treatment device for waste gas from acetic anhydride production, comprising the following steps: Step 1: Inject the waste gas into the treatment tank 1 through the air inlet pipe 2, and neutralize the waste gas through the spray tank, the connecting pipe 5 and the water spray pipe 6 to remove harmful components and prevent the waste gas from causing harm to the environment and human health; Step 2: The motor 4 rotates to drive the reciprocating screw 7 to rotate, the reciprocating screw 7 rotates to drive the elastic telescopic rod 10 to rotate, the elastic telescopic rod 10 rotates to drive the activated carbon plate 11 to rotate, and the activated carbon plate 11 rotates to make the plate surface evenly contact the pollutants in the exhaust gas, avoiding saturation and aging of local areas, and improving the adsorption efficiency of the activated carbon; Step 3: The reciprocating screw 7 drives the threaded plate 8 to reciprocate up and down during rotation, and the reciprocating motion of the threaded plate 8 drives the long rod 12 to reciprocate up and down, and the reciprocating motion of the long rod 12 drives the universal wheel 13 to reciprocate up and down. When the universal wheel 13 moves downward, it pushes the activated carbon plate 11 to move downward. The activated carbon plate 11 moves downward and rotates at the same time, which helps to improve the contact efficiency between the airflow and the activated carbon surface. This dynamic movement mode can increase the contact time between the exhaust gas and the activated carbon, thereby improving the adsorption rate; Step 4: When the activated carbon plate 11 moves downward, it contacts the elastic retractable scraper 14 . The free end of the elastic retractable scraper 14 scrapes off the impurities attached to the activated carbon plate 11 to prevent the impurities from affecting the adsorption effect of the activated carbon plate 11 .

[0024] When this embodiment is working: the exhaust gas is injected into the treatment tank 1 through the air inlet pipe 2, and the introduced exhaust gas is neutralized by the spray tank, the connecting pipe 5 and the water spray pipe 6 to remove harmful components and prevent the exhaust gas from causing harm to the environment and human health. At the same time, the reciprocating screw 7 is driven to rotate by the rotation of the motor 4, and the rotation of the reciprocating screw 7 will drive the elastic telescopic rod 10 to rotate, and the rotation of the elastic telescopic rod 10 will drive the activated carbon plate 11 to rotate. Through the rotation of the activated carbon plate 11, the plate surface can be evenly contacted with pollutants in the exhaust gas, avoiding saturation and aging of local areas, and improving the adsorption efficiency of the activated carbon. At the same time, the reciprocating screw 7 will drive the threaded plate 8 to reciprocate up and down during the rotation process. The up and down reciprocating motion of the threaded plate 8 will drive the long rod 12 to reciprocate up and down, and the up and down reciprocating motion of the long rod 12 will drive the universal wheel 13 to reciprocate up and down. When the universal wheel 13 moves downward, it will push the activated carbon plate 11 to move downward. The rotation of the activated carbon plate 11 while moving downward helps to improve the contact efficiency between the airflow and the activated carbon surface. This dynamic movement method can increase the contact time between the exhaust gas and the activated carbon, thereby improving the adsorption rate. At the same time, when the activated carbon plate 11 moves downward, it will contact the elastic retractable scraper 14. The free end of the elastic retractable scraper 14 will scrape off the impurities attached to the activated carbon plate 11 to prevent the impurities from affecting the adsorption effect of the activated carbon plate 11.

[0025] See also Figure 1-Figure 7On the basis of the above embodiment, in another embodiment of the present invention, a spraying device for improving the spraying range is arranged on the fixed frame 151, and a wastewater recovery device is arranged under the spraying device. The spraying device includes a water inlet 152, a nozzle 153, a sliding push rod 154 and a rotating plate 155. The water inlet 152 is fixedly installed on the surface of the water spray pipe 6, the nozzle 153 is fixedly installed at one end of the water inlet 152 away from the water spray pipe 6, the sliding push rod 154 is slidably installed on the inner wall of the treatment tank 1, and the rotating plate 155 is rotatably installed on the inner wall of the fixed frame 151. By increasing the spraying range of the nozzle 153, more exhaust gas can be brought into contact with the neutralization liquid, thereby improving the absorption of pollutants in the exhaust gas and the neutralization reaction efficiency, and improving the neutralization effect.

[0026] A sliding frame 156 is slidably installed on the inner wall of the fixed frame 151, and a sliding seat 158 ​​is slidably installed on the bottom of the inner wall of the fixed frame 151. A rotating plate 157 is rotatably installed on the inner wall of the sliding frame 156. The end of the rotating plate 157 away from the sliding frame 156 is rotatably installed on the inner wall of the sliding seat 158. A push plate 159 is fixedly installed on the surface of the sliding seat 158. The push plate 159 moves in a direction away from the nozzle 153 to push away impurities accumulated at the mouth of the nozzle 153, thereby preventing a large amount of impurities from accumulating in front of the nozzle 153 and affecting the spraying range of the nozzle 153.

[0027] A No. 1 torsion spring is arranged between the rotating plate 155 and the fixed frame 151, and the rotating plate 155 is reset by the No. 1 torsion spring. A No. 1 spring is arranged between the fixed frame 151 and the sliding frame 156, and the sliding frame 156 is reset by the No. 1 spring. A No. 2 spring is arranged between the fixed frame 151 and the sliding seat 158, and the sliding seat 158 ​​is reset by the No. 2 spring.

[0028] The wastewater recovery device includes a connecting plate 161, a sliding rod 162, a circular plate 163, a return spring 164 and a baffle 165. The connecting plate 161 is fixedly installed at the bottom of the sliding frame 156, the sliding rod 162 slides through the top of the intake pipe 2, the circular plate 163 is fixedly installed on the top of the sliding rod 162, the return spring 164 is sleeved on the surface of the sliding rod 162, and the baffle 165 is fixedly installed at the bottom of the circular plate 163. An air outlet is opened on the surface of the baffle 165 to prevent the spraying liquid from directly entering the intake pipe 2 through the air hole when the spraying range is increased, causing the spraying liquid to accumulate in the intake pipe 2, affecting the subsequent spraying effect.

[0029] An L-shaped rod 166 is fixedly installed at the bottom of the baffle 165, a guide frame 167 is fixedly installed on the inner wall of the treatment tank 1, a water outlet hole is opened on the surface of the guide frame 167, a water outlet is opened at the bottom of the guide frame 167, an elastic telescopic connecting rod 168 is fixedly installed on the top of the inner wall of the guide frame 167, a fixed plate 169 is fixedly installed on the free end of the elastic telescopic connecting rod 168, and a sealing plate 1610 is fixedly installed on the top of the fixed plate 169. The end of the L-shaped rod 166 away from the baffle 165 is fixedly installed on the top of the sealing plate 1610 to prevent a large amount of spray liquid from accumulating on the guide frame 167, resulting in subsequent spray liquid inlet holes, affecting the neutralization efficiency, so that the accumulated part of the spray liquid on the guide frame 167 can always be used to neutralize the exhaust gas, thereby improving the utilization efficiency of the spray liquid and preventing it from being discharged after spraying, resulting in waste of resources.

[0030] The sealing plate 1610 is arranged below the water outlet. By moving the sealing plate 1610 downward, the water outlet can be opened to discharge the spray liquid, preventing the spray liquid from accumulating too high and flowing into the intake pipe 2, affecting the subsequent exhaust gas entry. The sealing plate 1610 contacts the surface of the water outlet, and the sealing plate 1610 blocks the spray liquid from being lost.

[0031] When this embodiment is working: the downward movement of the activated carbon plate 11 will drive the sliding push rod 154 to move downward, and the downward movement of the sliding push rod 154 will drive the rotating plate 155 to rotate downward. The downward rotation of the rotating plate 155 will change the spraying range of the nozzle 153. By increasing the spraying range of the nozzle 153, more exhaust gas can be brought into contact with the neutralizing liquid, thereby improving the absorption and neutralization reaction efficiency of the pollutants in the exhaust gas and improving the neutralization effect. At the same time, the downward rotation of the rotating plate 155 will push the sliding frame 156 to move downward, and the downward movement of the sliding frame 156 will drive the rotating plate 157 to rotate downward. The downward rotation of the rotating plate 157 will squeeze the sliding seat 158 ​​to move away from the nozzle 153. The sliding seat 158 ​​moving away from the nozzle 153 will drive the push plate 159 to move away from the nozzle 153. The push plate 159 moves away from the nozzle 153 to push away the impurities accumulated at the nozzle 153 mouth, so as to prevent a large amount of impurities from accumulating in front of the nozzle 153 and affecting the spraying range of the nozzle 153.

[0032] The sliding frame 156 moves downward to drive the connecting plate 161 to move downward, and the connecting plate 161 moves downward to push the circular plate 163 to move downward, and the circular plate 163 moves downward to drive the baffle 165 to move downward, and the baffle 165 moves downward to block the air holes on the surface of the air intake pipe 2 to prevent the spraying liquid from directly entering the air intake pipe 2 through the air holes when the spraying range is increased, causing the spraying liquid to accumulate in the air intake pipe 2, affecting the subsequent spraying effect, and at the same time, the sprayed water moves downward along the guide frame 167, and the baffle 165 moves downward. At the same time, the L-shaped rod 166 will be driven to move downward, and the downward movement of the L-shaped rod 166 will push the sealing plate 1610 to move downward. The downward movement of the sealing plate 1610 will break away from the seal of the water outlet, allowing a small amount of spray liquid to flow out through the water outlet, preventing a large amount of spray liquid from accumulating on the guide frame 167, causing the subsequent spray liquid to enter the air hole and affect the neutralization efficiency. The spray liquid accumulated on the guide frame 167 can always be used to neutralize the exhaust gas, thereby improving the utilization efficiency of the spray liquid and preventing it from being discharged after spraying, resulting in a waste of resources.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A neutralization treatment device for waste gas from acetic anhydride production, characterized in that: include: A processing tank (1), wherein an air inlet pipe (2) is fixedly mounted on the bottom of the processing tank (1), air holes are provided on the surface of the air inlet pipe (2), and an air outlet pipe (3) is fixedly mounted on the top of the processing tank (1); An exhaust gas neutralization device, the exhaust gas neutralization device is arranged inside a treatment tank (1), the exhaust gas neutralization device comprises a motor (4), a connecting pipe (5), a fixing frame (151), a water spray pipe (6), a reciprocating screw rod (7), a threaded plate (8), a fixing rod (9), an elastic telescopic rod (10), an activated carbon plate (11), a long rod (12), a universal wheel (13) and an elastic telescopic scraper (14), the motor (4) is fixedly mounted on the top of the treatment tank (1), the fixing frame (151) is fixedly mounted on the inner wall of the treatment tank (1), the water spray pipe (6) is arranged inside the fixing frame (151), the connecting pipe (5) is fixedly mounted on the surface of the water spray pipe (6), and the connecting pipe (5) is remotely connected to the treatment tank (1). A spray tank is provided at one end away from the water spray pipe (6); the reciprocating screw rod (7) is fixedly mounted on the output end of the motor (4); the threaded plate (8) is threadedly mounted on the circumferential surface of the reciprocating screw rod (7); the fixed rod (9) is fixedly mounted on the top of the inner wall of the treatment tank (1); the fixed rod (9) penetrates the surface of the threaded plate (8); the elastic telescopic rod (10) is fixedly mounted on the bottom of the reciprocating screw rod (7); the activated carbon plate (11) is fixedly mounted on the free end of the elastic telescopic rod (10); the long rod (12) is fixedly mounted on the bottom of the threaded plate (8); the universal wheel (13) is fixedly mounted on the bottom of the long rod (12); and the elastic telescopic scraper (14) is fixedly mounted on the inner wall of the treatment tank (1); Wherein, a spraying device for increasing the spraying range is arranged on the fixing frame (151), and a waste water recovery device is arranged under the spraying device.

2. The acetic anhydride production waste gas neutralization treatment equipment according to claim 1, characterized in that: The universal wheel (13) is arranged above the activated carbon plate (11), and the elastic retractable scraper (14) is arranged below the activated carbon plate (11).

3. The acetic anhydride production waste gas neutralization treatment equipment according to claim 2, characterized in that: The spraying device comprises a water inlet (152), a spray head (153), a sliding push rod (154) and a rotating plate (155); the water inlet (152) is fixedly mounted on the surface of a spray pipe (6); the spray head (153) is fixedly mounted on an end of the water inlet (152) away from the spray pipe (6); the sliding push rod (154) is slidably mounted on the inner wall of the treatment tank (1); and the rotating plate (155) is rotatably mounted on the inner wall of the fixed frame (151).

4. The acetic anhydride production waste gas neutralization treatment equipment according to claim 3, characterized in that: A sliding frame (156) is slidably mounted on the inner wall of the fixed frame (151), a sliding seat (158) is slidably mounted on the bottom of the inner wall of the fixed frame (151), a rotating plate (157) is rotatably mounted on the inner wall of the sliding frame (156), one end of the rotating plate (157) away from the sliding frame (156) is rotatably mounted on the inner wall of the sliding seat (158), and a push plate (159) is fixedly mounted on the surface of the sliding seat (158).

5. The acetic anhydride production waste gas neutralization treatment equipment according to claim 4, characterized in that: A first torsion spring is provided between the rotating plate (155) and the fixed frame (151), a first spring is provided between the fixed frame (151) and the sliding frame (156), and a second spring is provided between the fixed frame (151) and the sliding seat (158).

6. The acetic anhydride production waste gas neutralization treatment equipment according to claim 5, characterized in that: The wastewater recovery device comprises a connecting plate (161), a sliding rod (162), a circular plate (163), a return spring (164) and a baffle (165); the connecting plate (161) is fixedly mounted on the bottom of the sliding frame (156); the sliding rod (162) slides through the top of the air inlet pipe (2); the circular plate (163) is fixedly mounted on the top of the sliding rod (162); the return spring (164) is sleeved on the surface of the sliding rod (162); the baffle (165) is fixedly mounted on the bottom of the circular plate (163); and an air outlet hole is provided on the surface of the baffle (165).

7. The acetic anhydride production waste gas neutralization treatment equipment according to claim 6, characterized in that: An L-shaped rod (166) is fixedly mounted on the bottom of the baffle (165); a guide frame (167) is fixedly mounted on the inner wall of the treatment tank (1); a water outlet hole is provided on the surface of the guide frame (167); a water outlet is provided on the bottom of the guide frame (167); an elastic telescopic connecting rod (168) is fixedly mounted on the top of the inner wall of the guide frame (167); a fixing plate (169) is fixedly mounted on the free end of the elastic telescopic connecting rod (168); a sealing plate (1610) is fixedly mounted on the top of the fixing plate (169); and one end of the L-shaped rod (166) away from the baffle (165) is fixedly mounted on the top of the sealing plate (1610).

8. The acetic anhydride production waste gas neutralization treatment equipment according to claim 7, characterized in that: The sealing plate (1610) is arranged below the water outlet, and the sealing plate (1610) is in contact with the surface of the water outlet.

9. A method for using a neutralization treatment device for waste gas from acetic anhydride production, using the neutralization treatment device for waste gas from acetic anhydride production according to claim 8, characterized in that: The following steps are involved: Step 1: Inject the waste gas into the treatment tank (1) through the air inlet pipe (2), and neutralize the introduced waste gas through the spray tank, the connecting pipe (5) and the water spray pipe (6) to remove harmful components and prevent the waste gas from causing harm to the environment and human health; Step 2: The motor (4) is rotated to drive the reciprocating screw (7) to rotate, the reciprocating screw (7) is rotated to drive the elastic telescopic rod (10), the elastic telescopic rod (10) is rotated to drive the activated carbon plate (11), and the activated carbon plate (11) is rotated, so that the plate surface can be evenly contacted with pollutants in the exhaust gas, thereby avoiding saturation and aging of local areas and improving the adsorption efficiency of the activated carbon; Step 3: During the rotation of the reciprocating screw (7), the threaded plate (8) is driven to move back and forth, and the up and down reciprocating motion of the threaded plate (8) drives the long rod (12) to move back and forth, and the up and down reciprocating motion of the long rod (12) drives the universal wheel (13) to move back and forth, and when the universal wheel (13) moves downward, it pushes the activated carbon plate (11) to move downward, and the activated carbon plate (11) moves downward and rotates at the same time, which helps to improve the contact efficiency between the airflow and the activated carbon surface. This dynamic movement mode can increase the contact time between the exhaust gas and the activated carbon, thereby improving the adsorption rate; Step 4: The activated carbon plate (11) moves downward and contacts the elastic retractable scraper (14). The free end of the elastic retractable scraper (14) scrapes off the impurities adhering to the activated carbon plate (11), thereby preventing the impurities from affecting the adsorption effect of the activated carbon plate (11).

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