CN117582795A - Treatment device and treatment method for catalytic ozonation wax film casting organic waste gas - Google Patents

Abstract

The invention discloses a catalytic ozonation wax film casting organic waste gas treatment device, which comprises a cyclone plate tower and a waste gas treatment tower; the waste gas treatment tower comprises a spraying device, a first packing layer and a gas mixing device, the waste gas treatment tower is provided with a gas inlet bin, the waste gas treatment tower is provided with an ozone generator, and the waste gas treatment tower is provided with an air extracting device; the spraying device comprises a connecting cylinder, a water inlet bin, a rotary table and a water tank; the connecting cylinder is provided with a water inlet pipe, and the turntable is provided with a plurality of spray heads; a second filler layer is arranged in the water tank; the gas mixing device is communicated with the gas inlet bin and the ozone generator; the air extraction device comprises an air extraction bin, a motor, a negative pressure blade arranged on an output shaft of the motor, and an air outlet pipe arranged on the air extraction bin. The air inlet bin and the ozone generator can release organic waste gas and ozone into the air mixing device, and meanwhile, part of ozone can be dissolved in alkali liquor, so that the organic waste gas and the alkali liquor fully react, and the VOCs removing effect in the organic waste gas is improved.

Description

A treatment device and method for catalytic ozone oxidation of wax film casting organic waste gas

Technical field

The present invention relates to the technical field of waste gas treatment, and specifically relates to a treatment device and a treatment method for organic waste gas from catalytic ozone oxidation wax film casting.

Background technique

"Wax casting" is a commonly used casting method, and many precision casting industries use this production process. However, wax film casting will produce smoke and organic waste gas during the wax hotting, wax removal, and roasting sections. The waste gas mainly includes VOCs, odor factors, and a small amount of smoke and dust. These waste gases will endanger the lives and health of workers, and will also seriously pollute the environment and affect the health of workers. Human beings live a normal life, so the waste gas generated during production needs to be controlled.

There are many methods for waste gas treatment at present, such as combustion method (including direct combustion, thermal combustion, catalytic combustion), adsorption method, plasma method and biodegradation. After analysis, the combustion method has shortcomings such as high energy consumption and difficulty in passing safety evaluation; the adsorption method has the problem of secondary pollution; the plasma method has shortcomings such as high energy consumption and low purification efficiency; biodegradation has insufficient effect on the removal of aromatic hydrocarbons and sulfur oxides. good. Therefore, the present invention develops a simple, efficient, and low-cost organic waste gas treatment technology.

Contents of the invention

In order to solve the above technical problems, the present invention provides a treatment device and a treatment method for organic waste gas from catalytic ozone oxidation of wax film casting.

The technical solution of the present invention is: a catalytic ozone oxidation wax film casting organic waste gas treatment device, including a cyclone plate tower and a waste gas treatment tower;

The waste gas treatment tower includes a spray device, a first packing layer and a gas mixing device arranged in sequence from top to bottom. An air intake bin is provided on one side of the waste gas treatment tower, and an ozone generator is provided on the other side of the waste gas treatment tower. An air extraction device is provided on the top surface of the treatment tower; the air outlet of the cyclone plate tower is connected to the air inlet bin through a pipeline;

The spray device includes a connecting tube arranged transversely in the exhaust gas treatment tower, a water inlet bin arranged in the connecting tube, a turntable arranged directly below the connecting tube, and a water tank arranged outside the exhaust gas treatment tower;

One side of the connecting tube is fixedly connected to the inner wall of the waste gas treatment tower, and the other side of the connecting tube is provided with a water inlet pipe connected with it. The water inlet pipe passes through the side wall of the waste gas treatment tower and is connected with the water tank. The water inlet bin The side wall is provided with an opening corresponding to the water inlet pipe;

A plurality of nozzles are vertically provided on the turntable, and the plurality of nozzles are connected to the bottom of the water inlet bin through pipes; the water tank is connected to the ozone generator through pipes, and a second filler layer for promoting ozone dissolution is provided in the water tank;

Both ends of the gas mixing device are connected to the air inlet chamber and the ozone generator respectively; the air extraction device includes an air extraction chamber arranged on the top surface of the exhaust gas treatment tower and connected with it, and a motor is provided on the outer top surface of the air extraction chamber. , the output shaft of the motor passes through the top surface of the air extraction chamber and is equipped with a negative pressure blade, and an air outlet pipe is provided on the side wall of the air extraction chamber.

Note: The air inlet chamber and ozone generator of the above device can release organic waste gas and ozone into the gas mixing device. At the same time, part of the ozone can enter the water tank and dissolve in the alkali solution, causing more hydroxyl radicals to be converted into the alkali solution. The organic waste gas fully reacts with the alkali liquid to improve the VOCs removal effect in the organic waste gas.

Further, the first filler layer and the second filler layer are filled with catalytic filler, and the catalytic filler is manganese oxide.

Description: Manganese oxide can catalyze the reaction between ozone and organic waste gas to increase the reaction speed.

Further, the gas mixing device includes a mixing chamber, an exhaust pipe provided on the top surface of the mixing chamber and connected with the mixing chamber, and two air inlet pipes respectively provided on both sides of the mixing chamber;

The two air inlet pipes are arranged symmetrically about the center, and one end of the two air inlet pipes extends to the inside of the mixing chamber, and an air outlet is provided on the side wall of the air inlet pipe in the mixing chamber, and the other ends of the two air inlet pipes pass through It passes through the side wall of the exhaust gas treatment tower and is connected to the air inlet chamber and the ozone generator, and the two air inlet pipes are slidingly and sealedly connected with a piston that uses left and right sliding to control the opening or closing of the air outlet. One of the air inlet pipes is connected to the piston A spring is provided between them, and a clamping device for clamping with the piston is provided on the side wall of one of the intake pipes;

The two pistons are each provided with racks transversely, and the two racks pass through the corresponding air inlet pipes and extend into the mixing chamber, and a rotating shaft is vertically provided in the mixing chamber, and a rotary shaft is set on the rotating shaft. A gear that meshes with two racks at the same time, and the lower end of the rotating shaft is rotationally connected to the bottom of the mixing chamber. The rotating shaft is equipped with a stirring blade, and the upper end of the rotating shaft is provided with threads;

There are a plurality of exhaust holes on the side wall of the exhaust cylinder, and a slider is slid inside the exhaust cylinder to control the opening or closing of the exhaust holes by sliding up and down. The upper end of the rotating shaft passes through the slider and is threaded with the slider. connect.

Explanation: After the air pressure in the air intake chamber of the above-mentioned air mixing device increases, the piston in one intake pipe will gradually move, and with the cooperation of the rack and gear, the piston in the other intake pipe will move synchronously, so that Organic waste gas and ozone can enter the mixing chamber at the same time. When the piston is restored, the gear will drive the rotating shaft to rotate the stirring blade, so that the organic waste gas and ozone are evenly mixed. When the piston is restored, the slider will slide upward, so that the mixed gas can be discharged from the exhaust gas. Ozone release, because ozone can be released synchronously with organic waste gas, no human operation is required, it is easy to use, and ozone and organic waste gas can be evenly mixed under the action of the stirring blade, so that VOCs in organic waste gas can fully react with ozone, ensuring that organic waste gas processing effect.

Furthermore, the clamping device includes a standpipe arranged on the side wall of one of the air inlet pipes and connected with it, and a limit block, a partition and a clamping column arranged in the standpipe from top to bottom;

The limit block is slidingly connected to the vertical pipe, and the limit block is provided with a connecting rod, which passes through the partition and is fixedly connected to the clamping column;

The partition is fixedly connected to the vertical pipe, and the clamping column is slidingly connected to the vertical pipe. The partition is provided with an electric push rod for pushing the limit block to slide upward. The connecting rod between the partition and the clamping column is equipped with a spring. , the side wall of the piston is provided with a clamping hole for slidingly matching the clamping column for clamping.

Note: When the piston moves to the position of the clamping device, the clamping column will slide upward and automatically clamp with the piston to keep the position of the piston stable and prevent the piston from moving randomly. The electric push rod can be extended to push the limit block to release the clamp. The column no longer engages the piston.

Furthermore, one end of the piston corresponding to the clamping column is chamfered.

Note: The chamfered piston can easily push the clamping column upward, preventing the piston from being clamped by the clamping column, and improving the stability of the device.

Further, the water inlet bin is rotatably and sealably connected to the connecting tube, and the lower end of the output shaft of the motor passes through the water inlet bin and the turntable in turn and is rotatably and sealably connected to the water inlet bin;

A through hole is transversely provided on the output shaft located at the corresponding position of the turntable. A second air bag is provided in the through hole. One end of the second air bag is provided with a valve that uses its inflation and deflation to control the engagement or separation with the turntable. The sliding column has a gas channel vertically connected to the second air bag on the output shaft;

A third airbag is provided between the top surface of the exhaust tube and the slider. The third airbag is connected to the gas channel through a trachea, and the trachea is rotationally connected to the gas channel.

Description: After the slider slides upward to open the exhaust tube, the slider will squeeze the third air bag, causing the gas in the third air bag to enter the second air bag to push the slide column and the turntable to engage, so that the motor can drive the turntable and water inlet. The water inlet chamber can be continuously connected to the water inlet pipe during the rotation process, so that the nozzle can spray alkali solution when the exhaust pipe is exhausted, reducing the waste of alkali solution. At the same time, the nozzle can follow the turntable rotation to spray alkali solution to improve the efficiency of the system. Lye spray range.

Furthermore, the lower end of the output shaft of the motor extends above the first packing layer and is covered with a cleaning plate that uses the rotation of the output shaft to clean the first packing layer.

Description: The cleaning plate can clean the surface of the first packing layer to prevent the first packing layer from being blocked by impurities.

On the other hand, the present invention provides a method for treating organic waste gas using the above treatment device, which includes the following steps:

S1. The organic waste gas during the wax mold casting process is collected and enters the cyclone plate tower. The cyclone plate tower cools down and removes dust from the organic waste gas and then enters the air inlet silo through the pipeline;

S2. The exhaust gas in the air intake chamber is mixed with a part of the ozone produced by the ozone generator in the gas mixing device, so that part of the pollutants in the exhaust gas are oxidized by ozone. After the mixing is completed, the mixed gas is obtained, and the mixed gas is mixed through the gas mixing device. Discharge to the exhaust gas treatment tower;

S3. Another part of the ozone produced by the ozone generator enters the water tank through the pipe and dissolves in the alkali solution in the water tank to generate hydroxyl radicals;

S4. Start the motor, which drives the negative pressure blade to rotate, causing the mixed gas to move upward. The alkali solution in the water tank enters the water inlet bin through the water inlet pipe, and is sprayed through the nozzle;

S5. The mixed gas will come into contact with the alkali liquid. Under the action of the alkali liquid, another part of the pollutants in the mixed gas will be further removed, and then the mixed gas will be discharged from the outlet pipe under the action of the negative pressure blade.

Note: In the above method, part of the ozone can be released into the gas mixing device along with the organic waste gas and mixed evenly under the action of the gas mixing device. The other part can be dissolved in the alkali solution to generate hydroxyl radicals in the alkali solution to ensure the elimination of VOCs. Removal.

Further, the alkali solution is a sodium hydroxide solution with a mass concentration of 10 to 15%, and the temperature of the sodium hydroxide solution is 20 to 30°C.

Note: The alkali cleaning effect of sodium hydroxide with the above concentration and temperature is better, and the removal of sulfide is more complete.

The beneficial effects of the present invention are:

(1) The air inlet chamber and ozone generator of the device of the present invention can release organic waste gas and ozone into the gas mixing device. At the same time, part of the ozone can enter the water tank and dissolve in the alkali solution, converting more hydroxyl radicals in the alkali solution. , allowing the organic waste gas to fully react with the alkali solution, and improving the VOCs removal effect in the organic waste gas.

(2) The air mixing device of the present invention can gradually move the piston in one intake pipe as the air pressure in the intake chamber increases, and under the cooperation of the rack and gear, the pistons in the two intake pipes will synchronize Move, so that ozone can be released synchronously with the organic waste gas, without human operation, easy to use, and when the piston is restored, ozone and organic waste gas can be evenly mixed under the action of the stirring blade, so that the VOCs in the organic waste gas can react with ozone evenly , ensuring the treatment effect of organic waste gas.

(3) In the device of the present invention, after the slider slides upward to open the exhaust tube, the slider will squeeze the third airbag, causing the gas in the third airbag to enter the second airbag to push the sliding column to engage with the turntable, so that the motor can drive The turntable rotates with the water inlet bin. The water inlet bin can be continuously connected to the water inlet pipe during the rotation process, so that the nozzle can only spray alkali solution when the exhaust pipe is exhausted to reduce the waste of alkali solution. At the same time, the nozzle can follow the turntable rotation to spray. lye to increase the lye spray range.

(4) In the method of the present invention, part of the ozone can be released into the gas mixing device following the organic waste gas, and evenly mixed under the action of the gas mixing device, and the other part can be dissolved in the alkali solution to generate hydroxyl radicals in the alkali solution to ensure VOCs removal effect.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

Figure 2 is a schematic structural diagram of an exhaust gas treatment tower in Embodiment 1 of the present invention;

Figure 3 is a cross-sectional view of the air mixing device according to Embodiment 1 of the present invention;

Figure 4 is a schematic diagram of the internal structure of the mixing chamber in Embodiment 1 of the present invention;

Figure 5 is a cross-sectional view of the air intake pipe according to Embodiment 1 of the present invention;

Figure 6 is an enlarged view of point A in Figure 5;

Figure 7 is a cross-sectional view of the exhaust pipe according to Embodiment 1 of the present invention;

Figure 8 is a schematic structural diagram of a sprinkler device according to Embodiment 1 of the present invention;

Figure 9 is a schematic structural diagram of a water tank in Embodiment 1 of the present invention;

Figure 10 is a cross-sectional view of the exhaust pipe according to Embodiment 2 of the present invention;

Figure 11 is a cross-sectional view of the sprinkler device according to Embodiment 2 of the present invention;

Figure 12 is an enlarged view of B in Figure 11;

Figure 13 is a schematic structural diagram of the cleaning plate in Embodiment 3 of the present invention;

Among them, 1-cyclone plate tower, 2-exhaust gas treatment tower, 21-air inlet bin, 22-ozone generator, 23-first packing layer, 24-air extraction bin, 241-exhaust pipe, 25-motor, 251 -Negative pressure blade, 252-second air bag, 253-sliding column, 254-cleaning plate, 26-drainage pipe, 3-air mixing device, 31-mixing chamber, 32-exhaust cylinder, 321-third air bag, 33 -Inlet pipe, 331-stand pipe, 332-connecting rod, 333-clip, 334-limit block, 335-electric push rod, 336-partition plate, 34-shaft, 341-gear, 342-mixing blade, 35 -Piston, 351-Rack, 36-Slider, 4-Spray device, 41-Connecting barrel, 42-Water inlet bin, 43-Water inlet pipe, 44-Turntable, 45-Nozzle, 46-Water tank, 461-No. Second filler layer.

Detailed ways

The present invention will be described in further detail below in conjunction with specific embodiments to better reflect the advantages of the present invention.

Example 1

As shown in Figure 1, a catalytic ozone oxidation wax film casting organic waste gas treatment device includes a cyclone plate tower 1 and a waste gas treatment tower 2. The cyclone plate tower 1 adopts existing technology products;

As shown in Figure 2, the exhaust gas treatment tower 2 includes a spray device 4, a first packing layer 23 and a gas mixing device 3 arranged in sequence from top to bottom. An air inlet bin 21 is provided on the left side of the exhaust gas treatment tower 2. The exhaust gas An ozone generator 22 is provided on the right side of the treatment tower 2. The ozone generator 22 adopts existing technology products. An air extraction device is provided on the top surface of the waste gas treatment tower 2; the air outlet of the cyclone plate tower 1 is connected to the inlet through a pipeline. The air chambers 21 are connected;

As shown in Figure 8, the spray device 4 includes a connecting cylinder 41 disposed transversely in the exhaust gas treatment tower 2, a water inlet bin 42 disposed in the connecting cylinder 41, and a turntable 44 disposed directly below the connecting cylinder 41. And a water tank 46 provided outside the exhaust gas treatment tower 2;

The left side of the connecting tube 41 is fixedly connected to the inner wall of the waste gas treatment tower 2, and the right side of the connecting tube 41 is provided with a water inlet pipe 43 connected thereto. The water inlet pipe 43 passes through the side wall of the waste gas treatment tower 2 and is connected to the water tank 46. , the side wall of the water inlet bin 42 is provided with an opening corresponding to the water inlet pipe 43;

There are two nozzles 45 vertically provided on the turntable 44, and the two nozzles 45 are connected to the bottom surface of the water inlet bin 42 through pipes; as shown in Figure 9, the water tank 46 is connected to the ozone generator 22 through pipes, and the water tank 46 There is a second filler layer 461 for promoting ozone dissolution;

The first filler layer 23 and the second filler layer 23 are both filled with catalytic filler, and the catalytic filler is manganese oxide;

Both ends of the gas mixing device 3 are connected to the air inlet bin 21 and the ozone generator 22 respectively; the air extraction device includes an air extraction bin 24 arranged on the top surface of the exhaust gas treatment tower 2 and connected with it. The air extraction bin 24 The outer top surface is provided with a motor 25. The motor 25 adopts existing technology products. The output shaft of the motor 25 passes through the top surface of the air extraction chamber 24 and is sleeved with a negative pressure blade 251. The side wall of the air extraction chamber 24 is provided with an outlet. Trachea 241;

As shown in Figures 3 and 4, the gas mixing device 3 includes a mixing chamber 31, an exhaust tube 32 provided on the top surface of the mixing chamber 31 and connected with the mixing chamber 31, and two exhaust pipes respectively provided on both sides of the mixing chamber 31. two air intake pipes 33;

As shown in Figure 5, the two air inlet pipes 33 are arranged centrally symmetrically, and the right ends of the two air inlet pipes 33 extend to the inside of the mixing chamber 31, and there is an outlet on the side wall of the air inlet pipe 33 located in the mixing chamber 31. The left ends of the two air inlet pipes 33 pass through the side wall of the exhaust gas treatment tower 2 and are connected to the air inlet bin 21 and the ozone generator 22, and the two air inlet pipes 33 are all slidably sealed and connected by sliding left and right to control the air holes. For the piston 35 with the air outlet open or closed, a spring is provided between the left air inlet pipe 33 and the piston 35, and the side wall of the left air inlet pipe 33 is provided with a snap-in device for snapping with the piston 35;

The two pistons 35 are each provided with racks 351 transversely. The two racks 351 respectively pass through the corresponding air inlet pipes 33 and extend into the mixing chamber 31, and a rotating shaft 34 is vertically provided in the mixing chamber 31, so The rotating shaft 34 is provided with a gear 341 for meshing with two racks 351 at the same time, and the lower end of the rotating shaft 34 is rotationally connected to the bottom surface of the mixing chamber 31. The rotating shaft 34 is provided with a stirring blade 342, and the upper end of the rotating shaft 34 is provided with a thread. ;

As shown in Figure 7, the exhaust tube 32 is provided with six exhaust holes on the side wall, and the exhaust tube 32 is provided with a slider 36 that slides up and down to control the opening or closing of the exhaust holes. The rotating shaft 34 The upper end passes through the slider 36 and is threadedly connected with the slider 36;

As shown in Figure 6, the clamping device includes a standpipe 331 provided on the side wall of the left air inlet pipe 33 and connected thereto. Limiting blocks 334, Partition plate 336 and clamping column 333;

The limit block 334 is slidingly connected to the vertical pipe 331, and the limit block 334 is provided with a connecting rod 332, which passes through the partition 336 and is fixedly connected to the clamping column 333;

The partition 336 is fixedly connected to the vertical pipe 331, and the clamping column 333 is slidingly connected to the vertical pipe 331. The partition 336 is provided with an electric push rod 335 for pushing the limit block 334 to slide upward. The electric push rod 335 adopts existing technology products. , the connecting rod 332 between the partition 336 and the clamping column 333 is covered with a spring, and the side wall of the piston 35 is provided with a clamping hole for slidingly cooperating with the clamping column 333; and the clamping column 333 One end of the corresponding piston 35 is chamfered;

The method for treating organic waste gas using the above treatment device includes the following steps:

S1. The organic waste gas during the wax mold casting process is collected and enters the cyclone plate tower 1. The cyclone plate tower 1 cools down and removes dust from the organic waste gas and then enters the air inlet silo 21 through the pipeline;

S2. The exhaust gas in the air inlet chamber 21 and a part of the ozone produced by the ozone generator 22 are mixed in the gas mixing device 3, so that part of the pollutants in the exhaust gas are oxidized by ozone. After the mixing is completed, the mixed gas is obtained, and passes through the gas mixing device 3. Discharge the mixed gas into the waste gas treatment tower;

S3. Another part of the ozone produced by the ozone generator 22 enters the water tank 46 through the pipeline, and is dissolved in the alkali solution in the water tank 46 to generate hydroxyl radicals;

S4. Start the motor 25. The motor 25 drives the negative pressure blade 251 to rotate, causing the mixed gas to move upward. The alkali solution in the water tank 46 enters the water inlet chamber 42 through the water inlet pipe 46, and is sprayed through the nozzle 45;

S5. The mixed gas will come into contact with the alkali liquid, and another part of the pollutants in the mixed gas will be further removed under the action of the alkali liquid, and then the mixed gas will be discharged from the air outlet pipe 241 under the action of the negative pressure blade 251;

The alkali solution is a sodium hydroxide solution with a mass concentration of 12%, and the temperature of the sodium hydroxide solution is 25°C;

It can be understood that the sum of the "part" and "another part" mentioned above is the total ozone or pollutants;

The working principle of the above-mentioned air mixing device is: as the air pressure in the air intake chamber 21 increases, the piston 35 corresponding to the left air intake pipe 33 slides to the right under the action of air pressure, and the piston 35 drives the left rack 351 to the right. Move to the right, so that the gear 341 drives the rotating shaft 34 to rotate clockwise, and the right rack 351 will move to the left under the rotation of the gear 341, so that the piston 35 corresponding to the right intake pipe 33 can slide to the left synchronously;

When the rotating shaft 34 rotates clockwise, the slider 36 will cooperate with the thread of the rotating shaft 34 and slide downward to close the exhaust tube 32. When the piston 35 in the left air inlet pipe 33 moves to the right side of the corresponding air outlet, the piston 35 will It is locked with the clamping column 333. At this time, the piston 35 in the right air inlet pipe 33 moves to the left side of the corresponding air outlet, so that the exhaust gas and ozone are synchronously released into the mixing chamber 31;

After the exhaust gas and ozone are released, the electric push rod 335 is controlled to extend so that the clamping column 333 no longer engages the piston 35. The left piston 35 begins to reset under the action of the spring. When the left piston 35 resets, it will drive the left rack 351 to the left. Move left to make the rotating shaft 34 rotate counterclockwise. When the rotating shaft 34 rotates, it will drive the stirring blade 342 to rotate, so that the exhaust gas and ozone are evenly mixed to obtain a mixed gas, and the slider 36 will cooperate with the thread of the rotating shaft 34 and slide upward to open the exhaust tube. 32. Discharge the mixed gas through the exhaust hole.

Example 2

As shown in Figures 10 and 11, this embodiment is basically the same as Embodiment 1. The difference is that the water inlet bin 42 is connected to the connecting tube 41 in a rotational seal, and the water inlet bin 42 is connected to the connecting tube through a connecting ring set thereon. The annular groove provided on the inner wall of the connecting tube 41 is connected for rotation, and the lower end of the output shaft of the motor 25 passes through the water inlet bin 42 and the turntable 44 in sequence and is connected to the water inlet bin 42 in a rotary seal;

As shown in Figure 12, the output shaft located at the corresponding position of the turntable 44 is laterally provided with a through hole. A second air bag 252 is provided in the through hole. The right end of the second air bag 252 is provided with an air bag for inflating and deflating. To control the sliding column 253 that is engaged or separated from the turntable 44, the output shaft is vertically provided with a gas channel connected to the second air bag 252;

A third air bag 321 is provided between the top surface of the exhaust tube 32 and the slider 36. The third air bag 321 is connected to the gas channel through a trachea, and the trachea is rotationally connected to the gas channel. The trachea passes through the third air bag 321. A filler layer 23.

The working principle of the above-mentioned spray device is: the first filler layer 23 can assist in fixing the air pipe. In the initial state, the opening of the water inlet bin 42 is not aligned with the water inlet pipe 43. At this time, the water inlet pipe 43 and the water inlet bin 42 are not connected. When the rotating shaft 34 rotates counterclockwise, the slider 36 will slide upward to open the exhaust tube 32 to discharge the mixed gas. At the same time, the slider 36 will squeeze the third airbag 321, and the gas in the third airbag 321 will be filled through the trachea and the gas channel. Enter the second air bag 252, inflate the second air bag 252 and push the slide column 253 to slide out and engage with the turntable 44. At this time, the motor 25 can drive the turntable 44 to rotate together with the water inlet chamber 42. During the rotation of the water inlet chamber 42, the opening can be It is continuously connected to the water inlet pipe 43 so that the sodium hydroxide solution in the water inlet pipe 43 can enter the nozzle 45 for spraying, and at the same time, the turntable can drive the nozzle 45 to rotate.

Example 3

As shown in Figure 13, this embodiment is basically the same as Embodiment 2. The difference is that the lower end of the output shaft of the motor 25 extends to above the first packing layer 23 and is sleeved with a rotating shaft that rotates the output shaft to rotate the first packing layer. 23 Cleaning plate 254 for cleaning.

The working principle of the above-mentioned cleaning plate 254 is: when the motor 25 rotates, it will drive the cleaning plate 254 to rotate. When the cleaning plate 254 rotates, it will clean the upper surface of the first filler layer 23.

Claims (9)

1. A treatment device for catalytic ozone oxidation of wax film casting organic waste gas, which is characterized in that it includes a cyclone plate tower (1) and a waste gas treatment tower (2); The exhaust gas treatment tower (2) includes a spray device (4), a first packing layer (23) and a gas mixing device (3) arranged in sequence from top to bottom. An air inlet is provided on one side of the exhaust gas treatment tower (2). Chamber (21), an ozone generator (22) is provided on the other side of the waste gas treatment tower (2), and an air extraction device is provided on the top surface of the waste gas treatment tower (2); the air outlet of the cyclone plate tower (1) passes through The pipeline is connected with the air intake chamber (21); The spray device (4) includes a connecting tube (41) arranged transversely in the exhaust gas treatment tower (2), a water inlet bin (42) arranged in the connecting tube (41), and a water inlet bin (42) arranged in front of the connecting tube (41). The lower turntable (44), and the water tank (46) provided outside the exhaust gas treatment tower (2); One side of the connecting tube (41) is fixedly connected to the inner wall of the waste gas treatment tower (2), and the other side of the connecting tube (41) is provided with a water inlet pipe (43) connected thereto. The water inlet pipe (43) passes through the waste gas treatment tower (2). The side wall of the tower (2) is connected to the water tank (46), and the side wall of the water inlet bin (42) is provided with an opening corresponding to the water inlet pipe (43); The turntable (44) is vertically provided with a plurality of nozzles (45), and the plurality of nozzles (45) are connected to the bottom of the water inlet bin (42) through pipes; the water tank (46) is connected to the ozone generator (46) through pipes. 22) Connected, the water tank (46) is provided with a second filler layer (461) for promoting ozone dissolution; Both ends of the gas mixing device (3) are connected to the air inlet chamber (21) and the ozone generator (22) respectively; the air extraction device includes an air extraction chamber arranged on the top surface of the exhaust gas treatment tower (2) and connected with it. (24), the outer top surface of the air extraction chamber (24) is provided with a motor (25), the output shaft of the motor (25) passes through the top surface of the air extraction chamber (24) and is sleeved with a negative pressure blade (251) ), and an air outlet pipe (241) is provided on the side wall of the air extraction chamber (24). 2. A treatment device for catalytic ozone oxidation wax film casting organic waste gas according to claim 1, characterized in that the first filler layer (23) and the second filler layer (23) are both filled with catalytic fillers , the catalytic filler is manganese oxide. 3. A treatment device for catalytic ozone oxidation wax film casting organic waste gas according to claim 1, characterized in that the gas mixing device (3) includes a mixing chamber (31), which is arranged in the mixing chamber (31). ) The exhaust pipe (32) on the top surface and connected with the mixing chamber (31), and the two air inlet pipes (33) respectively provided on both sides of the mixing chamber (31); The two air inlet pipes (33) are arranged symmetrically about the center, and one end of the two air inlet pipes (33) extends to the inside of the mixing chamber (31), and is located on the side wall of the air inlet pipe (33) in the mixing chamber (31). There are air outlets on the top, and the other ends of the two air inlet pipes (33) pass through the side walls of the exhaust gas treatment tower (2) and are connected to the air inlet bin (21) and the ozone generator (22), and the two air inlet pipes (33) There is a piston (35) in the internal sliding seal connection that uses left and right sliding to control the opening or closing of the air outlet. There is a spring between one of the air inlet pipes (33) and the piston (35), and one of the The side wall of the intake pipe (33) is provided with a clamping device for clamping with the piston (35); The two pistons (35) are each provided with racks (351) transversely, and the two racks (351) respectively pass through the corresponding air inlet pipes (33) and extend into the mixing chamber (31), and the mixing chamber (31) is vertically provided with a rotating shaft (34). The rotating shaft (34) is equipped with a gear (341) for meshing with two racks (351) at the same time, and the lower end of the rotating shaft (34) is connected to the mixing chamber. (31) The bottom surface is rotatably connected, the rotating shaft (34) is provided with a stirring blade (342), and the upper end of the rotating shaft (34) is provided with threads; There are multiple exhaust holes on the side wall of the exhaust tube (32), and there is a slider (36) sliding up and down in the exhaust tube (32) to control the opening or closing of the exhaust holes, and the rotating shaft (36) The upper end of 34) passes through the slider (36) and is threadedly connected with the slider (36). 4. A treatment device for catalytic ozone oxidation wax film casting organic waste gas according to claim 3, characterized in that the clamping device includes a device arranged on the side wall of one of the air inlet pipes (33) and connected with it. The vertical pipe (331) has the limiting block (334), partition (336) and clamping column (333) arranged in the vertical pipe (331) in sequence from top to bottom; The limit block (334) is slidingly connected to the vertical pipe (331), and the limit block (334) is provided with a connecting rod (332). The connecting rod (332) passes through the partition (336) and Fixedly connected to the clamping column (333); The partition (336) is fixedly connected to the vertical pipe (331), the clamping column (333) is slidingly connected to the vertical pipe (331), and the partition (336) is provided with an electric pusher for pushing the limit block (334) to slide upward. Rod (335), the connecting rod (332) between the partition (336) and the clamping column (333) is covered with a spring, and the side wall of the piston (35) is provided with a spring for sliding with the clamping column (333). Match the card holes for card connection. 5. A device for treating organic waste gas from catalytic ozone oxidation wax film casting according to claim 4, characterized in that one end of the piston (35) corresponding to the clamping column (333) is chamfered. 6. A treatment device for catalytic ozone oxidation wax film casting organic waste gas according to claim 3, characterized in that the water inlet chamber (42) is connected to the connecting barrel (41) in a rotational seal, and the motor (25) ) The lower end of the output shaft passes through the water inlet bin (42) and the turntable (44) in sequence and is connected to the water inlet bin (42) in a rotary and sealing manner; The output shaft located at the corresponding position of the turntable (44) is transversely provided with a through hole. A second air bag (252) is provided in the through hole. One end of the second air bag (252) is provided with a device for inflating and deflating air. To control the sliding column (253) that is engaged or separated from the turntable (44), the output shaft is vertically provided with a gas channel connected to the second air bag (252); A third air bag (321) is provided between the top surface of the exhaust tube (32) and the slider (36). The third air bag (321) is connected to the gas channel through a trachea, and the trachea is connected to the gas channel. Channel rotation connection. 7. A treatment device for catalytic ozone oxidation wax film casting organic waste gas according to claim 6, characterized in that the lower end of the output shaft of the motor (25) extends to above the first filler layer (23) and is sleeved There is a cleaning plate (254) that uses the rotation of the output shaft to clean the first packing layer (23). 8. The method for treating organic waste gas by the treatment device according to any one of claims 1 to 7, characterized in that it includes the following steps: S1. The organic waste gas during the wax mold casting process is collected and enters the cyclone plate tower (1). The cyclone plate tower (1) cools down and removes dust from the organic waste gas and then enters the air inlet bin (21) through the pipeline; S2. The exhaust gas in the air inlet chamber (21) and a part of the ozone produced by the ozone generator (22) are mixed in the gas mixing device (3), so that part of the pollutants in the exhaust gas are oxidized by ozone. After the mixing is completed, a mixed gas is obtained , and discharge the mixed gas into the waste gas treatment tower through the gas mixing device (3); S3. Another part of the ozone produced by the ozone generator (22) enters the water tank (46) through the pipeline, and is dissolved in the alkali solution in the water tank (46) to generate hydroxyl radicals; S4. Start the motor (25). The motor (25) drives the negative pressure blade (251) to rotate, causing the mixed gas to move upward. The alkali solution in the water tank (46) enters the water inlet bin (42) through the water inlet pipe (46). And spray through the nozzle (45); S5. The mixed gas will come into contact with the alkali liquid, and another part of the pollutants in the mixed gas will be further removed under the action of the alkali liquid, and then the mixed gas will be discharged from the air outlet pipe (241) under the action of the negative pressure blade (251). 9. A method for treating organic waste gas from catalytic ozone oxidation wax film casting according to claim 8, characterized in that the alkali liquid is a sodium hydroxide solution with a mass concentration of 10 to 15%, and the temperature of the sodium hydroxide solution is 20~30℃.