CN107754543A - Exhaust gas purification system - Google Patents

Abstract

The exhaust gas purification system provided by the present invention includes a pretreatment filter device, a first vacuum filter box and a second vacuum filter box, and also includes a sedimentation tank. The pretreatment filter device is installed at the exhaust gas inlet, and the first vacuum filter box is equipped with Water filtration treatment device, the second vacuum filter box is provided with an exhaust pipe, the exhaust pipe is provided with a vacuum pump, and a water pump is provided at the connection between the inlet pipe of the sedimentation tank and the sedimentation tank; it has good water and gas separation effect and good purification effect. Good, high purification efficiency, low purification cost and wide application range.

Description

Exhaust gas purification system

technical field

The invention belongs to the technical field of exhaust gas purification, and in particular relates to an exhaust gas purification system.

Background technique

With the development of social economy, the degree of industrialization of society is also deepening. At the same time, the problem of air pollution caused by the process of social industrialization has attracted more and more attention. The waste gas emitted by industrial production often has harmful effects on the environment and human health. On the other hand, the survival of enterprises is the inevitable result of the large amount of waste gas discharged. The state requires enterprises to discharge the industrial waste gas produced by their production into the atmosphere. Purification measures should be taken to make it meet the requirements of the exhaust gas emission standards, and severe punishments have been imposed on enterprises that fail to meet the emission standards. Whether it is for environmental protection or for the sustainable development of enterprises, exhaust gas purification is the next technical problem that needs to be solved urgently.

At present, the basic methods of exhaust gas purification adopted by the exhaust gas purification system include absorption method, adsorption method, condensation method, catalytic conversion method and combustion method, etc. Among them, the water absorption method has a wide range of applications due to its low cost and simple required devices. However, in the prior art systems that use water absorption to purify exhaust gas, the purified water cannot be recycled well, and it cannot be separated and dried well from the gas, which in turn causes waste of purified water and reduces the purification effect of the purified gas. , Ultimately resulting in the reduction of the purification effect of the entire exhaust gas purification system, the reduction of purification efficiency and the increase of purification costs.

Contents of the invention

In order to solve the technical defects in the above-mentioned prior art, the present invention provides a waste gas that can realize the recycling of purified water, fully separate and dry purified water and gas at the same time, have better purification effect, higher purification efficiency, and low purification cost. purification system.

The present invention solves its technical problem and realizes through the following technical solutions:

Exhaust gas purification system, including a pretreatment filtering device, a first vacuum filter box and a second vacuum filter box connected in sequence through a filter pipe, and also includes a sedimentation tank, and the first vacuum filter box discharges sewage into the sedimentation tank through an outlet pipe , the sedimentation tank enters the precipitated clean water into the first vacuum filter box through the water inlet pipe, the pretreatment filter device is installed at the exhaust gas inlet, the first vacuum filter box is provided with a water filter treatment device, and the There is an exhaust pipe in the second vacuum filter box, a vacuum pump is provided on the exhaust pipe, and a water pump is arranged at the connection between the inlet pipe of the sedimentation tank and the sedimentation tank.

As a further improved technical solution, the water filtration treatment device includes a first steel wire mesh and a curved exhaust pipe, the first steel wire mesh is fixed in the first vacuum filter box, and an opening is opened. The filter tube of the filter device leading into the first vacuum filter box passes through the opening and connects with the curved exhaust pipe below. The surface of the first steel mesh is placed with filter cloth, and the surface of the curved exhaust pipe is provided with several microporous.

As a further improved technical solution, in the second vacuum filter box, the mouth of the filter pipe is lower than the mouth of the exhaust pipe, and the mouth of the exhaust pipe is set in a trumpet shape.

As a further improved technical solution, the vacuum pump adopts an exhaust multi-cylinder vacuum pump.

As a further improved technical solution, a low-pressure progress balance meter is provided on the filter pipe between the pretreatment filter device and the first vacuum filter box, and a low-pressure progress balance meter is also provided on the exhaust pipe. Adjusting valves are provided on the outlet and the exhaust pipe, and a water level observation glass tube is provided on one side of the first vacuum filter box.

As a further improved technical solution, the diameter of the microholes is 0.5mm, and the distance between the microholes is 7-9mm.

As a further improved technical solution, the mouth of the water inlet pipe leading into the first vacuum filter box is located above the first steel wire mesh.

As a further improved technical solution, filter stone piles with a slope of 30-35° are placed at the bottom of the first vacuum filter box and the second vacuum filter box, and trash racks are also installed.

As a further improved technical solution, the sedimentation tank is divided into the first sedimentation bin, the second sedimentation bin and the third sedimentation bin each equipped with a regulating valve in turn, and the outlet pipe leading from the first vacuum filter box The waste water is immersed into the bottom of the first sedimentation bin through the outlet pipe, and the bottom of the first sedimentation bin, the second sedimentation bin and the third sedimentation bin are all equipped with trash racks and filter stone piles with a slope of 30-35°. The sedimentation tank and the second sedimentation tank are blocked by a first partition wall, the first partition wall has filter holes, and the filter holes are in an inverted triangle shape, and the second sedimentation tank and the third sedimentation tank are separated by a second partition wall. The second partition wall has a wedge-shaped opening, the first partition wall and the second partition wall are made of concrete materials, the filter holes and wedge-shaped openings are all made of steel materials, and the middle part of the third settling bin A horizontal second steel mesh is provided, and the surface of the second steel mesh is covered with a permeable cotton cloth, and a reagent is placed on the permeable cotton cloth, and the reagent is composed of the following components in weight percentage: quicklime 40%, flocculant 40% and coke 20%.

The beneficial effects of the present invention are:

(1) Two vacuum filter boxes are used, one is used for water filtration, and the other is used for drying the purified gas after water filtration, so that the purified water and gas can be separated better, ensuring the discharge after purification The gas produced has a better purification effect, and at the same time reduces the consumption and waste of purified water, and reduces the cost of purification;

(2) Set up a sedimentation tank to settle the polluted purified water after use, and finally get clean purified water, which is added to the first vacuum filter box for purification and filtration, which can realize the recycling of purified water, and can not only solve the problem of The problem of local water shortage saves resources and improves the efficiency of purification;

(3) The structure is simple, the use is convenient, the application range is wide, and it has good application prospects and commercial prospects.

Description of drawings

Fig. 1 is a schematic plan view of the present invention;

Fig. 2 is a schematic diagram of the exhaust multi-cylinder vacuum pump mechanism disclosed by the present invention;

Reference signs: 1. Pretreatment filter device; 11. Large particle filter; 12. Sedimentation cup; 2. First vacuum filter box; 21. Water filtration treatment device; 211. First steel wire mesh; 2111. Opening; 2112, filter cloth; 212, curved exhaust pipe; 2121, microporous; 3, the second vacuum filter box; 31, exhaust pipe; 32, vacuum pump; 4, sedimentation tank; 41, outlet pipe; 42, water inlet pipe; 43, water pump; 44, first sedimentation bin; 45, second sedimentation bin; 46, third sedimentation bin; 461, second steel wire mesh; 462, permeable cotton cloth; 47, first partition wall; 471, filter hole; 48. Second partition wall; 481. Wedge-shaped opening; 5. Low-pressure progress balance meter; 6. Regulating valve; 7. Glass tube for water level observation; 8. Filter stone pile; 9. Trash rack; 10. Filter pipe; 13. Exhaust gas inlet; 14. Sewage pipe.

Detailed ways

The specific implementation of the present invention will be further elaborated below in conjunction with FIG. 1 and the principle of the invention. The following specific implementation examples are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.

Example

As shown in Figure 1, the exhaust gas to be treated passes through the pretreatment filter device 1 from the exhaust gas inlet 13, and the large particle filter screen 1111 will first filter out the large particles in the exhaust gas, and the front end of the large particle filter screen 11 is provided with a sediment The purpose of cup 12 is to contain the large particles in the exhaust gas filtered out by the large particle filter screen 11.

In this embodiment, the filter pipe 10 passing through the filter cloth 2112 in the first vacuum filter box 2 and the opening 2111 on the wire mesh is immersed in water and connected with the curved exhaust pipe 212. It should be noted that the first vacuum The water level in the filter box 2 does not exceed the first wire mesh 211 . In order to increase the contact area between exhaust gas and water, the curved exhaust pipe 212 is stacked in a spiral shape, and the number of circles is determined according to the low-pressure schedule balance table 5 near the exhaust gas inlet 13; at the same time, the surface of the curved exhaust pipe 212 is A microhole 2121 is arranged at an interval of 7-9mm, and the diameter of the microhole 2121 is 0.5mm. The exhaust gas is discharged through the microhole 2121 and enters the water.

During the whole waste gas purification process, the vacuum pump 32 keeps working. As shown in FIG. 2 , the vacuum pump 32 in this embodiment adopts an exhaust multi-cylinder vacuum pump 32 . It should be noted that the air pressure of the exhaust multi-cylinder vacuum pump 32 is specifically determined according to the low pressure schedule balance table 5 at the inlet and outlet. The gas purified by the first vacuum filter box 2 is sucked out through the filter cloth 2112 under the action of the exhaust multi-cylinder vacuum pump 32 , and then enters the second vacuum filter box 3 . It should be noted that the filter cloth 2112 has the functions of controlling the humidity of the gas and further purifying the gas.

The filter pipe 10 that communicates with the first vacuum filter box 2 and the second vacuum filter box 3 in the present embodiment, it is placed in the pipe mouth in the first vacuum filter box 2 and is at least 30cm away from the water surface, so it is set because in the tube When the mouth is more than 30cm away from the water surface, water can be prevented from being sucked into the filter tube 10. When the embodiment is implemented, even if water is sucked into the second vacuum filter box 3 by the vacuum pump 32 , the gas can be separated from the water after being purified by the second vacuum filter box 3 , and then discharged through the exhaust pipe 31 . In order to improve the gas discharge efficiency after purification, in the present embodiment, in the second vacuum filter box 3, the nozzle position of the filter pipe 10 is lower than the nozzle position of the exhaust pipe 31, and the nozzle position of the exhaust pipe 31 is set at the same time Trumpet shaped.

In this embodiment, the bottom of the first vacuum filter box 2 is connected to the sedimentation tank 4 through the outlet pipe 41, and the sedimentation tank 4 is divided into a first sedimentation bin 44, a second sedimentation bin 45, and a third sedimentation bin that are each provided with a regulating valve 6 in turn. 46, the waste water in the outlet pipe 41 leading from the first vacuum filter box 2 is immersed into the bottom of the first settling bin 44 through the drain pipe, and the bottoms of the first settling bin 44, the second settling bin 45 and the third settling bin 46 are all A trash rack 9 and a filter stone pile 8 with a slope of 30-35° are set, and the first sedimentation tank 4 and the second sedimentation tank 4 are blocked by a first partition wall 47, and the first partition wall 47 There is a filter hole 471, the filter hole 471 is an inverted triangle, the second sedimentation tank 4 and the third sedimentation tank 4 are blocked by a second partition wall 48, and the second partition wall 48 has a wedge-shaped mouth 481, Both the first partition wall 47 and the second partition wall 48 are made of concrete, and the filter hole 471 and the wedge-shaped opening 481 are made of steel. It should be noted that the size of the sedimentation tank 4 is determined according to the exhaust gas volume. The outlet pipe 41 entering the first settling bin 44 is immersed in water, which can increase the resistance of the water in the vacuum filter box. In this embodiment, a sewage discharge pipe 14 is also provided at the bottom of the sedimentation bin, the purpose of which is to filter impurities in the waste water and prevent blockage of large impurities. The filter hole 471 has the functions of measuring flow rate and filtering, and the waste water after sedimentation in the first settling bin 44 enters the second settling bin 45 through the filter hole 471 . The wedge-shaped mouth has the functions of drainage and oxygenation, and the waste water in the second sedimentation bin 45 flows into the third sedimentation bin 46 through the wedge-shaped mouth. The middle part of the third settling bin 46 is provided with a horizontal second steel wire mesh 461. The upper surface of the second steel wire mesh 461 is covered with a water-permeable cotton cloth 462. A reagent is placed on the water-permeable cotton cloth 462. The reagent consists of 40% quicklime, 40% flocculant and 20% coke. % by weight component composition, its purpose is to neutralize the chemical substances in the wastewater and realize comprehensive purification. The water in the third settling tank 4 storehouse re-enters the vacuum filter box through the water pump 43, and the power of the water pump 43 is determined according to the amount of waste gas. In this embodiment, the mouth of the water inlet pipe 42 leading into the first vacuum filter box 2 is located above the steel wire mesh, and its purpose is to automatically flush the filter cloth 2112 .

In this embodiment, a water level observation glass tube 7 is provided on one side of the first vacuum filtration box 2 , and the water level observation glass tube 7 can intuitively reflect the change of the water level in the first vacuum filtration box 2 .

The scale of the present invention can be determined according to the specific application object. Through the long-term research and experiment of the inventor, the described technical scheme of the present invention is not only applicable to large enterprises such as factories, chemical fertilizer plants, printing plants, and pharmaceutical factories. For shopping malls, Public places such as restaurants and families are also applicable, and the application prospect is very broad.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, these improvements and modifications It should also be regarded as the protection scope of the present invention.

Claims (10)

1. The exhaust gas purification system is characterized in that it includes a pretreatment filter device, a first vacuum filter box and a second vacuum filter box connected in sequence through a filter pipe, and also includes a sedimentation tank, and the first vacuum filter box passes through the outlet pipe The sewage is discharged into the sedimentation tank, and the sedimentation tank inputs the precipitated clean water into the first vacuum filter box through the water inlet pipe, the pretreatment filter device is installed at the exhaust gas inlet, and the first vacuum filter box is equipped with water As for the filtration treatment device, there is an exhaust pipe in the second vacuum filter box, a vacuum pump is provided on the exhaust pipe, and a suction pump is arranged at the connection between the water inlet pipe of the sedimentation tank and the sedimentation tank. 2. The exhaust gas purification system according to claim 1, wherein the pretreatment filter device comprises a large particle filter screen and a sedimentation cup, the large particle filter screen covers the cross section of the filter pipe, and the large particle filter screen The lower end is provided with a sedimentation cup. 3. The exhaust gas purification system according to claim 1 or 2, wherein the water filtration device comprises a first steel mesh and a curved exhaust pipe, and the first steel mesh is fixed in the first vacuum filter box , there is an opening, the filter pipe leading from the pretreatment filter device into the first vacuum filter box passes through the opening and connects with the curved exhaust pipe below, and the surface of the first steel mesh is placed to filter The surface of the curved exhaust pipe is provided with several micropores. 4. The exhaust gas purification system according to claim 3, characterized in that, in the second vacuum filter box, the mouth of the filter pipe is lower than the mouth of the exhaust pipe, while the exhaust The nozzle of the tube is provided in a trumpet shape. 5. The exhaust gas purification system according to any one of claims 1, 2, and 4, wherein the vacuum pump is an exhaust multi-cylinder vacuum pump. 6. The exhaust gas purification system according to any one of claims 1, 2, and 4, wherein a low-pressure schedule balance meter is provided on the filter pipe between the pretreatment filter device and the first vacuum filter box, and the The exhaust pipe is also provided with a low-pressure progress balance meter, the exhaust gas inlet and the exhaust pipe are provided with regulating valves, and a water level observation glass tube is provided on one side of the first vacuum filter box. 7. The exhaust gas purification system according to claim 3, characterized in that, the diameter of the micropores is 0.5mm, and the distance between the micropores is 7-9mm. 8. The exhaust gas purification system according to claim 7, characterized in that, the mouth of the water inlet pipe leading into the first vacuum filter box is located above the first steel wire mesh. 9. The exhaust gas purification system according to any one of claims 1, 2, 4, 7, 8, characterized in that, the bottom of the first vacuum filter box and the second vacuum filter box are placed with a slope of 30-35 ° filtering stone pile, and also set up trash rack. 10. The waste gas purification system as claimed in claim 1, wherein the settling tank is successively divided into a first settling bin, a second settling bin and a third settling bin each provided with a regulating valve, and the first settling tank The waste water in the outlet pipe leading into the vacuum filter box is immersed into the bottom of the first sedimentation bin through the outlet pipe, and the bottom of the first sedimentation bin, the second sedimentation bin and the third sedimentation bin are all provided with trash racks and the slope is 30-35° ° filter stone pile, the first sedimentation tank and the second sedimentation tank are blocked by a first partition wall, the first partition wall has a filter hole, and the filter hole is an inverted triangle, and the second sedimentation tank The second partition wall is blocked from the third sedimentation tank, the second partition wall has a wedge-shaped opening, the first partition wall and the second partition wall are made of concrete materials, and the filter holes and wedge-shaped openings are all made of steel quality material, the middle part of the third settling chamber is provided with a horizontal second steel wire mesh, the surface of the second steel mesh is covered with water-permeable cotton cloth, and reagents are placed on the water-permeable cotton cloth, and the reagents are composed of the following components in weight percentage: Quicklime 40%, flocculant 40% and coke 20%.