CN110368791A - A kind of industrial waste gas purifying technique - Google Patents

Abstract

The invention belongs to the technical field of waste gas treatment, and specifically relates to an industrial waste gas purification process. The waste gas purification device used includes a frame, an electric push rod and a controller; A second partition is provided below a partition; the second partition is slidably connected to the inner wall of the frame; the space between the first partition and the second partition is filled with sodium hydroxide solution; the first The trachea is set through the first partition, and a second trachea is slidably connected to the first trachea; the lower end of the second trachea is located below the liquid level of the sodium hydroxide solution; the outer wall of the frame is fixedly connected with a storage ring; the A floating block is slidably connected in the storage ring; the present invention purifies the waste gas by ejecting the sodium hydroxide solution and the photocatalyst, and at the same time can purify the odor in the waste gas, and can realize the combination of the sodium hydroxide solution and the photocatalyst. of recycling.

Description

An industrial waste gas purification process

technical field

The invention belongs to the technical field of waste gas treatment, in particular to an industrial waste gas purification process.

Background technique

Industrial waste gas refers to the general term for all kinds of pollutant gases that are discharged into the air during fuel combustion and production processes in the enterprise factory area.

These exhaust gases include: carbon dioxide, carbon disulfide, hydrogen sulfide, fluoride, nitrogen oxides, chlorine, hydrogen chloride, carbon monoxide, sulfuric acid (mist) lead mercury, beryllium compounds, smoke and productive dust, which will pollute the air when discharged into the atmosphere. These substances enter the human body through the respiratory tract through different channels, some of which directly cause harm, and some have a cumulative effect, which will seriously endanger human health. Among them, sulfur compounds are the most abundant in the exhaust gas.

Photocatalyst is a general term for a photo-semiconductor material with photocatalytic function represented by nano-scale titanium dioxide. It is coated on the surface of the substrate and has a strong catalytic degradation function under the action of ultraviolet light and visible light: it can effectively degrade air. Toxic and harmful gases; can effectively kill a variety of bacteria, and can decompose and harmless the toxins released by bacteria or fungi; at the same time, it also has the functions of removing formaldehyde, deodorizing, anti-pollution, and purifying air; photocatalyst materials mainly There are nano-TiO2, ZnO, CdS, WO3, Fe2O3, PbS, SnO2, ZnS, SrTiO3, SiO2, etc.; the titanium dioxide electrode can be irradiated with light to carry out the electrolysis reaction of water; the water or oxygen in the air will be catalyzed into hydroxyl radicals and Superoxide anion radicals, active oxygen and other photoactive groups with oxidation ability.

In the prior art, the industrial waste gas treatment has a single treatment method. Generally, filter screens are used for simple filtration and then discharged, while some use spray filtration. During spray filtration, the water after spraying is also directly discharged, not only It wastes water resources and causes certain pollution to groundwater. After the industrial waste gas is treated, although there are no more pollutants in the waste gas, the smell of the waste gas is still pungent, and the discharge into the atmosphere seriously affects people's lives. There are devices and methods for precision purification in the prior art, but resources cannot be effectively recycled and utilized in the process of purifying exhaust gas, resulting in too high purification costs, and small enterprises cannot afford the cost of investment.

Contents of the invention

In order to make up for the deficiencies of the existing technology and solve the problem of single waste gas purification method, direct discharge of substances used to purify waste gas causing secondary pollution, after waste gas purification, the irritating odor in the waste gas is not simultaneously purified and the cost of waste gas purification is high. An industrial waste gas purification process proposed by the invention.

The technical solution adopted by the present invention to solve its technical problems is: a kind of industrial waste gas purification process described in the present invention, this process comprises the following steps:

S1: Pass the industrial exhaust gas through the filter screen to filter larger particles, and pass the exhaust gas through the filter screen through the plasma grid layer to remove heavy metals in the exhaust gas; then pass the preliminary filtered exhaust gas into the exhaust gas purification device, and Start the exhaust gas purification device before the exhaust gas is passed through. The double filtration of the filter and the plasma layer can effectively treat the exhaust gas and reduce the workload of the exhaust gas purification device, thereby effectively improving the service life of the exhaust gas purification device and improving the purification of the exhaust gas. efficiency and extent;

S2: Pass the gas discharged from the exhaust gas purification device in S1 into the anaerobic pool and then into the aerobic pool. The anaerobic bacteria in the anaerobic pool can decompose the organic matter in the exhaust gas, and the aerobic bacteria in the aerobic pool Further decompose the organic matter in the exhaust gas, effectively improving the efficiency and degree of purification of the exhaust gas;

S3: Pass the exhaust gas discharged from the aerobic pool in S2 into the alkaline solution, and the exhaust gas passing through the alkaline solution can be discharged into the atmosphere, and the residual sulfur in the exhaust gas can be further removed through the alkaline solution, and discharged into the atmosphere to pollute the atmosphere ;

Wherein, the exhaust gas purification device used in S1 includes a frame body, an electric push rod and a controller; the controller is used to control the operation of the electric push rod; A second partition is provided; the second partition is slidably connected to the inner wall of the frame; the number of the electric push rods is two, and they are all fixedly connected to the bottom inner wall of the frame, and the extending ends of the electric push rods are all fixed to the The lower surface of the second dividing plate; the space between the first dividing plate and the second dividing plate is filled with sodium hydroxide solution; two flexible bladders are fixedly connected between the first dividing plate and the second dividing plate, The bottom of the bellows communicates with the space between the first partition and the second partition, and a one-way valve is provided at the connection; two atomizing nozzles are fixedly connected to the upper surface of the first partition; the atomizing nozzles are respectively connected to The corresponding telescopic bag is connected, and a one-way valve is provided at the connection point; two first air pipes are fixedly connected to the upper surface of the first partition; the first air pipe is set through the first partition, and the first air pipe slides A second air pipe is connected; the lower end of the second air pipe is located below the liquid level of the sodium hydroxide solution; an air outlet pipe is provided outside the frame, and the upper surface of the end of the air outlet pipe in the frame is horizontal to the lower surface of the first partition; When working, before the exhaust gas is about to pass through, the controller makes the electric push rod intermittently expand and contract, thereby pushing the second partition to move up and down. The sodium hydroxide solution in the capsule is sprayed out through the atomizing nozzle. After the waste gas enters the device, it can directly contact with the atomized sodium hydroxide solution to purify the waste gas. When the second partition moves down, the expansion bag is pulled , so that the sodium hydroxide solution between the first partition and the second partition enters the expansion bag to supplement the consumption of the sodium hydroxide solution in the expansion bag. Due to the continuous introduction of exhaust gas, the air pressure in the space above the first partition rises. Because the sulfur-containing waste gas in the exhaust gas is larger than the air quality, the exhaust gas after the preliminary evolution floats up, and the gas after the preliminary evolution enters the sodium hydroxide solution through the first air pipe and the second air pipe, and passes through the second time of the sodium hydroxide solution. Purification, improve the purification efficiency of exhaust gas, the purified exhaust gas is discharged through the outlet pipe, through multi-layer purification, the purification efficiency of exhaust gas is improved, and the structure is simple, which can be applied to small industrial factories.

Preferably, an air bag is provided between the two telescopic bags; the air bag is fixedly connected to the lower surface of the first partition and the upper surface of the second partition; A spray gun is evenly connected to the surface; a first cavity is opened in the first partition; an extrusion plate is slidably connected in the first cavity; the first cavity space below the extrusion plate communicates with the air bag; A storage box is fixedly connected to the outside of the frame; a photocatalyst is installed in the storage box, and a feeding port is opened on the top of the storage box; the first cavity space above the extrusion plate is connected to the storage box, and a single The side wall of the frame is provided with an ultraviolet light tube; when working, when the second extrusion plate moves, the air bag is squeezed, so that the extrusion plate moves, and the photocatalyst in the first cavity above the extrusion plate The photocatalyst can be fully contacted with the exhaust gas due to the uniform arrangement of the spray gun. The ultraviolet lamp is started at the same time as the electric push rod, and the photocatalyst is irradiated by ultraviolet rays to produce a strong catalytic degradation effect, and the sodium hydroxide solution is used to improve the exhaust gas Purification efficiency and purification degree. At the same time, the photocatalyst reacts with the water in the sodium hydroxide solution to produce hydroxyl radicals. With the sodium hydroxide solution, the purification of sulfur in the exhaust gas is improved, and the purification effect is stronger and more thorough. effective purification of odors.

Preferably, a storage ring is fixedly connected to the outer wall of the frame; the storage ring communicates with the space above the first partition and the space below the first partition through holes opened in the frame, and communicates with the space below the first partition. The side of the hole close to the frame is above the liquid level of the sodium hydroxide solution, and the other end is at the bottom of the storage ring, and a check valve is arranged in the hole; the upper surface of the first partition is designed in an arched shape; the storage The object ring is located under the storage box; when working, the atomizing nozzle and the spray gun respectively spray out the sodium hydroxide solution and the photocatalyst to purify the exhaust gas. Due to the arched design on the surface of the first partition, the excess sodium hydroxide solution and photocatalyst pass through The hole flows into the storage ring, and enters the space between the first partition and the second partition through the hole, mixes with the sodium hydroxide solution, and the hydroxyl radical generated by the reaction of the photocatalyst and water is added to the sodium hydroxide solution, increasing The content of hydroxyl radicals in the sodium hydroxide solution can improve the efficiency of exhaust gas purification. At the same time, material recycling can save resources and avoid waste of resources, thereby saving costs, and is more suitable for small enterprises.

Preferably, a floating block is slidably connected in the storage ring; the floating block is made of light material and can be suspended on the surface of the solution; the surface of the floating block is provided with evenly arranged filter holes, which can filter the waste gas Particle filtration; the thickness of the buoyant block is greater than the diameter of the hole, and the buoyant block is designed in a ring shape, which is set close to the inner wall of the storage ring to prevent the backflow of the sodium hydroxide solution; the surface of the storage ring is provided with a feeding port; when working After the sodium hydroxide solution and photocatalyst on the surface of the first partition flow into the storage ring, the floating block floats up, the sodium hydroxide solution and photocatalyst are filtered through the floating block, enter the space between the first partition and the second partition, pass The filtration of the block can effectively filter the particulate matter in the exhaust gas, and at the same time, the filtered particulate matter can be taken out through the feeding port to avoid the blockage of the filter hole caused by more sedimentation of the particulate matter, and the sodium hydroxide solution and the photocatalyst in the filter hole are collected through the filter hole of the floating block. Filtration of particulate impurities can improve the efficiency of sodium hydroxide solution and photocatalyst recycling, avoid excessive impurities entering the sodium hydroxide solution and pollute the sodium hydroxide, thereby ensuring the purification efficiency of exhaust gas while saving costs.

Preferably, a filter plate is fixedly connected to the frame, and the filter plate is located above the first partition; the filter plate is made of water-absorbent material, and the surface of the filter plate is provided with uniformly arranged air holes; the upper end of the first air pipe passes through The filter plate is set and extends to the top of the filter plate; when working, the sodium hydroxide solution is sprayed through the atomizing nozzle and the photocatalyst is sprayed through the spray gun to purify the waste gas in the space above the first partition, part of the sodium hydroxide solution and The photocatalyst is adhered to the surface of the filter plate, and the exhaust gas that is about to enter the first air pipe and the second air pipe can be further purified through the filter plate, and the first air pipe passes through the filter plate, which can ensure that the gas entering the first air pipe has undergone multiple purifications , and prevent particles from entering the first air pipe to improve the purification degree of exhaust gas. At the same time, water droplets can be formed on the lower surface of the filter plate, which increases the contact area between sodium hydroxide, photocatalyst and exhaust gas, thereby improving the purification efficiency of exhaust gas.

Preferably, the water-absorbing cotton cloth is fixedly connected in the air holes; one end of the water-absorbing cotton cloth is fixedly connected to the inner wall of the air hole, and the other end extends downward to form the air hole, and a spring is fixedly connected between the middle part of the water-absorbing cotton cloth and the inner wall of the air hole; When the sodium hydroxide solution and the photocatalyst are sprayed through the atomizing nozzle and the spray gun respectively, the absorbent cotton cloth absorbs the sodium hydroxide solution and the photocatalyst, and cooperates with the filter plate to further increase the contact area between the exhaust gas, the sodium hydroxide solution and the photocatalyst, and improve the purification efficiency of the exhaust gas. At the same time, when the exhaust gas passes through the air outlet, it drives the water-absorbing cotton cloth to vibrate, and the vibration of the water-absorbing cotton cloth hits the filter plate, causing the filter plate to vibrate. With the water-absorbing cotton cloth to prevent the particles in the exhaust gas from blocking the air outlet, the sodium hydroxide solution on the lower surface of the filter plate and The water droplets formed by the photocatalyst shake off to prevent the water droplets formed by the sodium hydroxide solution and the photocatalyst from combining with the particles in the exhaust gas to stick to the lower surface of the filter plate, making it difficult to recover the sodium hydroxide solution and the photocatalyst, thereby improving the recovery efficiency of the sodium hydroxide solution and the photocatalyst. At the same time, the purification efficiency of exhaust gas is improved.

The beneficial effects of the present invention are as follows:

1. A kind of industrial waste gas purification process described in the present invention, by arranging electric push rod, the first dividing plate, the second dividing plate, sodium hydroxide solution, photocatalyst, atomizing nozzle, spray gun, air bag and telescoping bag, through electric The push rod makes the second partition squeeze and relax the air bag and the expansion bag, so that the sodium hydroxide solution and the photocatalyst are ejected to purify the exhaust gas, and at the same time, the odor in the exhaust gas can be purified with a high degree of purification.

2. A kind of industrial exhaust gas purification process of the present invention, by setting storage ring and floating block, sodium hydroxide solution and photocatalyst enter in the storage ring after spraying out, and particle impurity is filtered by floating block, make after filtering The sodium hydroxide solution and photocatalyst re-enter the space between the first partition and the second partition to realize the recovery and reuse of sodium hydroxide solution and photocatalyst, and the hydroxyl radicals generated by the reaction of photocatalyst and water can replenish hydrogen Consumption of sodium oxide solution.

3. In the process for purifying industrial waste gas according to the present invention, by setting a filter plate and water-absorbent cotton cloth, the waste gas entering the first trachea can be subjected to multiple purifications through the filter plate, and at the same time, the vibration of the water-absorbent cotton cloth can drive the filter plate to vibrate to speed up the process. Recovery of sodium hydroxide solution and photocatalyst.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing.

Fig. 1 is a process flow diagram of the present invention;

Fig. 2 is the front view of the waste gas purification device used in the present invention;

Fig. 3 is a partial enlarged view of A in Fig. 2;

Fig. 4 is a partial enlarged view of place B in Fig. 2;

In the figure: frame body 1, electric push rod 11, first partition 12, second partition 13, telescopic bag 14, atomizing nozzle 15, first air pipe 16, second air pipe 17, air outlet pipe 18, air bag 2, Conduit 21, first cavity 22, extrusion plate 23, storage box 24, storage ring 3, floating block 31, filter plate 4, air hole 41, water-absorbing cotton cloth 42.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

As shown in Fig. 1 to Fig. 4, a kind of industrial waste gas purification process of the present invention, this process comprises the following steps:

S1: Pass the industrial exhaust gas through the filter screen to filter larger particles, and pass the exhaust gas through the filter screen through the plasma grid layer to remove heavy metals in the exhaust gas; then pass the preliminary filtered exhaust gas into the exhaust gas purification device, and Start the exhaust gas purification device before the exhaust gas is passed through. The double filtration of the filter and the plasma layer can effectively treat the exhaust gas and reduce the workload of the exhaust gas purification device, thereby effectively improving the service life of the exhaust gas purification device and improving the purification of the exhaust gas. efficiency and extent;

S2: Pass the gas discharged from the exhaust gas purification device in S1 into the anaerobic pool and then into the aerobic pool. The anaerobic bacteria in the anaerobic pool can decompose the organic matter in the exhaust gas, and the aerobic bacteria in the aerobic pool Further decompose the organic matter in the exhaust gas, effectively improving the efficiency and degree of purification of the exhaust gas;

S3: Pass the exhaust gas discharged from the aerobic pool in S2 into the alkaline solution, and the exhaust gas passing through the alkaline solution can be discharged into the atmosphere, and the residual sulfur in the exhaust gas can be further removed through the alkaline solution, and discharged into the atmosphere to pollute the atmosphere ;

Wherein, the exhaust gas purification device used in S1 includes a frame body 1, an electric push rod 11 and a controller; the controller is used to control the operation of the electric push rod 11; the frame body 1 is fixedly connected with a first partition 12, And the second partition 13 is provided under the first partition 12; the second partition 13 is slidably connected to the inner wall of the frame body 1; the number of the electric push rods 11 is two, and they are all fixedly connected to the bottom inner wall of the frame body 1, And the protruding ends of the electric push rod 11 are all fixedly connected to the lower surface of the second partition 13; the space between the first partition 12 and the second partition 13 is equipped with sodium hydroxide solution; the first partition Between the plate 12 and the second partition 13 are fixedly connected with two telescopic bags 14, the bottom of the telescopic bag 14 communicates with the space between the first partition 12 and the second partition 13, and a one-way valve is provided at the communication point; The upper surface of the first dividing plate 12 is fixedly connected with two atomizing nozzles 15; the atomizing nozzles 15 communicate with the corresponding telescoping bladders 14 respectively, and a one-way valve is provided at the connecting place; the upper surface of the first dividing plate 12 is fixed Two first air pipes 16 are connected; the first air pipe 16 is set through the first partition 12, and a second air pipe 17 is slidably connected in the first air pipe 16; the lower end of the second air pipe 17 is located in the sodium hydroxide solution below the liquid level; the frame 1 is provided with an air outlet pipe 18, and the upper surface of the end of the air outlet pipe 18 in the frame 1 is level with the lower surface of the first partition 12; The controller makes the electric push rod 11 expand and contract intermittently, thereby pushing the second partition 13 to move up and down. During the upward movement of the second partition 13, it cooperates with the first partition 12 to squeeze the telescopic bag 14, so that the hydrogen in the telescopic bag 14 is oxidized. The sodium solution is sprayed out through the atomizing nozzle 15. After the exhaust gas enters the device, it can directly contact with the atomized sodium hydroxide solution to purify the exhaust gas. When the second partition 13 moves down, the telescopic bag 14 is pulled, Make the sodium hydroxide solution between the first partition 12 and the second partition 13 enter into the telescopic bag 14 to supplement the consumption of the sodium hydroxide solution in the telescopic bag 14. As the space pressure rises, because the sulfur-containing exhaust gas in the exhaust gas is larger than the air quality, the exhaust gas after the preliminary evolution floats up, and the gas after the preliminary evolution enters the sodium hydroxide solution through the first air pipe 16 and the second air pipe 17, and passes through the hydrogen The secondary purification of sodium oxide solution improves the purification efficiency of exhaust gas. The purified exhaust gas is discharged through the outlet pipe 18, and the purification efficiency of exhaust gas is improved through multi-layer purification. The structure is simple and can be applied to small industrial factories.

As an embodiment of the present invention, an air bag 2 is arranged between the two flexible bags 14; the air bag 2 is fixedly connected to the lower surface of the first partition 12 and the upper surface of the second partition 13; The middle part of the upper surface of the partition 12 is fixedly connected with a conduit 21, and the surface of the conduit 21 is evenly connected with a spray gun; the first partition 12 is provided with a first cavity 22; the first cavity 22 is slidingly connected with an extrusion Plate 23; the first cavity 22 space below the extruding plate 23 communicates with the airbag 2; the outside of the frame 1 is fixedly connected with a storage box 24; A feeding port is provided; the space of the first cavity 22 above the extruding plate 23 is connected to the storage box 24, and a check valve is provided at the connection; the side wall of the frame body 1 is provided with an ultraviolet lamp; during work, the second When the dividing plate 13 moved up, the air bag 2 was extruded, so that the extruding plate 23 was moved up, so that the photocatalyst in the first cavity 22 above the extruding plate 23 entered the conduit 21 and was sprayed out by the spray gun. Make the photocatalyst fully contact with the exhaust gas, the ultraviolet lamp is started at the same time as the electric push rod 11, and the photocatalyst is irradiated by ultraviolet rays to produce a strong catalytic degradation effect, and the sodium hydroxide solution is used to improve the purification efficiency and purification degree of the exhaust gas. At the same time, the photocatalyst and the sodium hydroxide solution The water reacts to produce hydroxyl radicals, and the sodium hydroxide solution is used to improve the purification of sulfur in the exhaust gas. The purification effect is stronger and more thorough. At the same time, the photocatalyst can effectively purify the odor in the exhaust gas.

As an embodiment of the present invention, the outer wall of the frame body 1 is fixedly connected with a storage ring 3; the storage ring 3 communicates with the space above the first partition 12 and the first partition through holes opened in the frame body 1, respectively. The space below the plate 12, the hole that communicates with the space below the first partition 12 is located near the side of the frame 1 above the liquid level of the sodium hydroxide solution, and the other end is at the bottom of the storage ring 3, and the holes are equipped with one-way Valve; the upper surface of the first partition 12 is designed in an arched shape; the storage ring 3 is located below the storage box 24; during operation, after the atomizing nozzle 15 and the spray gun spray the sodium hydroxide solution and the photocatalyst respectively, the waste gas is purified , due to the arched design of the upper surface of the first partition 12, excess sodium hydroxide solution and photocatalyst flow into the storage ring 3 through the holes, and enter the space between the first partition 12 and the second partition 13 through the holes, Mixed with sodium hydroxide solution, the hydroxyl radicals produced by the reaction of photocatalyst and water are added to the sodium hydroxide solution, increasing the content of hydroxyl radicals in the sodium hydroxide solution, thereby improving the efficiency of exhaust gas purification, and at the same time material recycling can save Resources, to avoid the waste of resources, thereby saving costs, more suitable for small businesses.

As an embodiment of the present invention, a floating block 31 is slidably connected in the storage ring 3; the floating block 31 is made of light material and can be suspended on the surface of the solution; the surface of the floating block 31 is provided with The evenly arranged filter holes can filter the particles in the exhaust gas; the thickness of the floating block 31 is greater than the diameter of the hole, and the floating block 31 is designed in a ring shape, which is arranged close to the inner wall of the storage ring 3, so as to prevent the backflow of the sodium hydroxide solution; The surface of the storage ring 3 is provided with a material intake port; during operation, after the sodium hydroxide solution and the photocatalyst on the surface of the first partition 12 flow into the storage ring 3, the floating block 31 floats up, and the sodium hydroxide solution and the photocatalyst are filtered through the floating block 31 Finally, it enters the space between the first partition 12 and the second partition 13, and the particulate impurities in the exhaust gas can be effectively filtered through the filtration of the floating block 31, and at the same time, the filtered particulate can be taken out through the feeding port to avoid the precipitation of the particulate More lead to blockage of the filter holes, filter the particulate impurities in the sodium hydroxide solution and the photocatalyst through the filter holes of the float 31, which can improve the recycling efficiency of the sodium hydroxide solution and the photocatalyst, and avoid excessive impurities from entering the sodium hydroxide solution , Pollution of sodium hydroxide, thereby ensuring the purification efficiency of exhaust gas while saving cost and consumption.

As an embodiment of the present invention, a filter plate 4 is fixedly connected to the frame body 1, and the filter plate 4 is located above the first partition 12; Evenly arranged air holes 41; the upper end of the first air pipe 16 passes through the filter plate 4 and extends to the top of the filter plate 4; during work, after the sodium hydroxide solution is ejected by the atomizing nozzle 15 and the photocatalyst is ejected by the spray gun, the The exhaust gas in the space above the first dividing plate 12 is purified, and part of the sodium hydroxide solution and the photocatalyst are adhered to the surface of the filter plate 4, and the exhaust gas that is about to enter the first air pipe 16 and the second air pipe 17 can be further purified by the filter plate 4 , and the first air pipe 16 passes through the filter plate 4, which can ensure that the gas entering the first air pipe 16 has undergone multiple purifications, and prevent particulate matter from entering the first air pipe 16, thereby improving the purification degree of the exhaust gas. At the same time, the lower surface of the filter plate 4 can be The formation of water droplets increases the contact area of sodium hydroxide, photocatalyst and exhaust gas, thereby improving the purification efficiency of exhaust gas.

As an embodiment of the present invention, the air holes 41 are fixed with water-absorbent cotton cloth 42; There is a spring fixedly connected with the inner wall of the air hole 41; during work, when the sodium hydroxide solution and the photocatalyst are sprayed out through the atomizing nozzle 15 and the spray gun respectively, the water-absorbing cotton cloth 42 absorbs the sodium hydroxide solution and the photocatalyst, and cooperates with the filter plate 4 to further improve the waste gas. The contact area with the sodium hydroxide solution and the photocatalyst improves the exhaust gas purification efficiency. At the same time, when the exhaust gas passes through the air outlet 41, it drives the water-absorbent cotton cloth 42 to vibrate, and the vibration of the water-absorbent cotton cloth 42 hits the filter plate 4, causing the filter plate 4 to vibrate. While the cotton cloth 42 prevents the particles in the exhaust gas from clogging the air outlet 41, shake off the water droplets formed by the sodium hydroxide solution and the photocatalyst on the lower surface of the filter plate 4 to prevent the water droplets formed by the sodium hydroxide solution and the photocatalyst from combining with the particles in the exhaust gas to stick to the filter plate 4 The lower surface makes it difficult to recover the sodium hydroxide solution and the photocatalyst, thereby improving the recovery efficiency of the sodium hydroxide solution and the photocatalyst while improving the purification efficiency of the exhaust gas.

When working, pass the industrial waste gas through the filter screen to filter larger particles, and pass the waste gas through the filter screen through the plasma grid layer to remove heavy metals in the waste gas; then pass the preliminary filtered waste gas into the waste gas purification device, And start the exhaust gas purification device before the exhaust gas is introduced; before the exhaust gas is about to be introduced, the electric push rod 11 is intermittently stretched and retracted through the controller, thereby pushing the second partition 13 to move up and down. During the upward movement of the second partition 13, cooperate with The first partition 12 squeezes the telescopic bag 14, so that the sodium hydroxide solution in the telescopic bag 14 is sprayed out through the atomizing nozzle 15. After the exhaust gas enters the device, it can directly contact the atomized sodium hydroxide solution, so that the exhaust gas Carry out purification, when the second dividing plate 13 moves down, pull the flexible bag 14, make the sodium hydroxide solution between the first dividing plate 12 and the second dividing plate 13 enter in the flexible bag 14, supplement the hydrogenation in the flexible bag 14 The consumption of sodium solution, due to the continuous introduction of waste gas, the air pressure in the space above the first partition 12 rises, because the sulfur-containing waste gas in the waste gas is larger than the air mass, the waste gas after the preliminary evolution floats up, and the gas after the preliminary evolution passes through The first air pipe 16 and the second air pipe 17 enter the sodium hydroxide solution, and the purified waste gas is discharged through the air outlet pipe 18. When the second partition 13 moves up, the air bag 2 is squeezed, so that the extrusion plate 23 moves up, so that The photocatalyst in the first cavity 22 above the extrusion plate 23 enters the conduit 21 and is sprayed out through the spray gun. The ultraviolet lamp is started simultaneously with the electric push rod 11, and the atomizing nozzle 15 and the spray gun spray out the sodium hydroxide solution and the photocatalyst respectively. , to purify exhaust gas, due to the arched design of the upper surface of the first partition 12, excess sodium hydroxide solution and photocatalyst flow into the storage ring 3 through the hole, and enter between the first partition 12 and the second partition 13 through the hole After the sodium hydroxide solution and photocatalyst on the surface of the first partition 12 flow into the storage ring 3, the floating block 31 floats up, and the sodium hydroxide solution and photocatalyst are filtered through the floating block 31 and then enter the first space. The space between the partition 12 and the second partition 13 can effectively filter the particulate matter impurities in the exhaust gas through the filtration of the floating block 31, and at the same time, the filtered particulate matter can be taken out through the feeding port, and the sodium hydroxide solution is passed through the atomizing nozzle After 15 ejection and photocatalyst are ejected by the spray gun, the waste gas in the space above the first partition 12 is purified, part of the sodium hydroxide solution and the photocatalyst are adhered to the surface of the filter plate 4, and the filter plate 4 can further filter the waste gas that is about to enter the first space. The exhaust gas in the air pipe 16 and the second air pipe 17 is further purified, and the first air pipe 16 passes through the filter plate 4, which can ensure that the gas entering the first air pipe 16 has undergone multiple purifications, and prevents particles from entering the first air pipe 16. When the sodium oxide solution and the photocatalyst are ejected through the atomizing nozzle 15 and the spray gun respectively, the water-absorbing cotton cloth 42 absorbs the sodium hydroxide solution and the photocatalyst, and when the waste gas passes through the air outlet 41, the water-absorbing cotton cloth 42 is driven to vibrate, and the water-absorbing cotton cloth 42 is shaken and filtered. plate 4 to shake the filter plate 4, the gas discharged from the exhaust gas purification device passes into the anaerobic pool and then into the aerobic pool, the anaerobic bacteria in the anaerobic pool decompose the organic matter in the exhaust gas, The aerobic bacteria in the aerobic pool further decompose the organic matter in the exhaust gas; the exhaust gas discharged through the aerobic pool is passed into the alkaline solution, and the exhaust gas passed through the alkaline solution can be discharged into the atmosphere.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Variations and improvements all fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. A process for purifying industrial waste gas, characterized in that: the process comprises the following steps: S1: Pass the industrial exhaust gas through the filter screen to filter larger particles, and pass the exhaust gas through the filter screen through the plasma grid layer to remove heavy metals in the exhaust gas; then pass the preliminary filtered exhaust gas into the exhaust gas purification device, and Start the exhaust gas purification device before the exhaust gas is introduced; S2: Pass the gas discharged from the exhaust gas purification device in S1 into the anaerobic pool and then into the aerobic pool. The anaerobic bacteria in the anaerobic pool can decompose the organic matter in the exhaust gas, and the aerobic bacteria in the aerobic pool Further decompose the organic matter in the exhaust gas; S3: Pass the exhaust gas discharged from the aerobic pool in S2 into the alkaline solution, and the exhaust gas passing through the alkaline solution can be discharged into the atmosphere; Wherein, the exhaust gas purification device used in S1 includes a frame (1), an electric push rod (11) and a controller; the controller is used to control the operation of the electric push rod (11); A first partition (12) is connected, and a second partition (13) is provided below the first partition (12); the second partition (13) is slidably connected to the inner wall of the frame body (1); the The number of electric push rods (11) is two, which are all fixedly connected to the inner wall of the bottom of the frame body (1), and the extended ends of the electric push rods (11) are all fixedly connected to the lower surface of the second dividing plate (13); Sodium hydroxide solution is housed in the space between a dividing plate (12) and the second dividing plate (13); bag (14), the bottom of the flexible bag (14) communicates with the space between the first partition (12) and the second partition (13), and a one-way valve is provided at the communication point; on the first partition (12) There are two atomizing nozzles (15) fixedly connected to the surface; the atomizing nozzles (15) are respectively communicated with the corresponding expansion bladders (14), and a check valve is provided at the connection; Two first air pipes (16) are fixedly connected to the surface; the first air pipe (16) is arranged through the first partition (12), and a second air pipe (17) is slidably connected in the first air pipe (16); The lower end of the second trachea (17) is positioned below the liquid level of the sodium hydroxide solution; the frame (1) is provided with a trachea (18) outside, and the trachea (18) is located at one end of the frame (1). The upper surface is level with the lower surface of the first partition (12). 2. A kind of industrial waste gas purification process according to claim 1, characterized in that: an air bag (2) is arranged between the two telescopic bags (14); the air bag (2) is fixedly connected to the first compartment The lower surface of the plate (12) and the upper surface of the second partition (13); the middle part of the upper surface of the first partition (12) is fixedly connected with a conduit (21), and the surface of the conduit (21) is evenly connected with a spray gun; A first cavity (22) is opened in the first partition (12); an extruding plate (23) is slidably connected in the first cavity (22); the first extruding plate (23) below the extruding plate (23) The cavity (22) is connected to the air bag (2); the frame (1) is fixedly connected with a storage box (24); a photocatalyst is housed in the storage box (24), and the top of the storage box (24) is opened There is a feeding port; the space of the first cavity (22) above the extrusion plate (23) is connected to the storage box (24), and a one-way valve is provided at the connection; the side wall of the frame (1) is provided with an ultraviolet lamp Tube. 3. A kind of industrial waste gas purification process according to claim 2, characterized in that: the outer wall of the frame (1) is fixedly connected with a storage ring (3); the storage ring (3) passes through the frame ( 1) The holes opened in the inside are respectively connected to the space above the first partition (12) and the space below the first partition (12), and the holes connected to the space below the first partition (12) are close to one side of the frame (1) It is located above the liquid level of the sodium hydroxide solution, and the other end is at the bottom of the storage ring (3), and a one-way valve is arranged in the hole; the upper surface of the first partition (12) is designed in an arched shape; the storage The ring (3) is located under the storage box (24). 4. An industrial exhaust gas purification process according to claim 3, characterized in that: a floating block (31) is slidably connected in the storage ring (3); the floating block (31) is made of light material Made, can be suspended on the solution surface; The surface of the floating block (31) is provided with evenly arranged filter holes, which can filter the particles in the exhaust gas; The thickness of the floating block (31) is greater than the diameter of the hole, and the floating block ( 31) Ring design, which is set close to the inner wall of the storage ring (3); the surface of the storage ring (3) is provided with a material intake port. 5. An industrial exhaust gas purification process according to claim 1, characterized in that: a filter plate (4) is fixedly connected in the frame (1), and the filter plate (4) is located on the first partition (12) Above; the filter plate (4) is made of water-absorbing material, and the surface of the filter plate (4) is provided with uniformly arranged air holes (41); the upper end of the first air pipe (16) is set through the filter plate (4), extending to the top of the filter plate (4). 6. A kind of industrial waste gas purification process according to claim 5, characterized in that: the water-absorbing cotton cloth (42) is fixedly connected in the air hole (41); one end of the water-absorbing cotton cloth (42) is fixedly connected to the air hole ( 41) the inner wall, the other end extends downwards and the air hole (41) is set, and a spring is fixedly connected between the middle part of the water-absorbing cotton cloth (42) and the inner wall of the air hole (41).