CN204365111U - A low-temperature plasma deodorization device - Google Patents

Abstract

The utility model provides a low-temperature plasma odor removal device, which belongs to the technical field of polluted air purification, and is specifically a device for eliminating odorous and harmful gases in landfills, chemical plants, pharmaceutical plants, etc. It includes a gas collection port, an induced draft fan, a microporous membrane dust collector, a primary spray tower, a shutdown control device, a low-temperature plasma purification chamber, a secondary spray tower, a water storage tank, a submersible pump, a vent and pipelines. The utility model has compact components, small footprint, wide application range, high working efficiency, low energy consumption, and the efficiency of removing odorous and harmful gases such as ammonia-hydrogen sulfide can reach more than 98%, with good economic benefits, social benefits and environmental benefits.

Description

A low-temperature plasma deodorization device

technical field

The utility model belongs to the technical field of polluted air purification, and in particular relates to a device for purifying odorous and harmful gases discharged from landfills, chemical plants, pharmaceutical factories and other places.

Background technique

With the development of social industrialization, environmental problems have become increasingly prominent. In the whole air pollution, the odor and harmful gas mainly come from the production process of petrochemical industry, sewage treatment, landfill, chemical pharmaceutical, electronic industry, leather processing, etc., which not only pollutes the workshop environment, endangers the health of the staff at the post, but also induces The main precursor pollutants of photochemical smog pose a serious threat to urban air quality. Due to the characteristics of large air volume, low concentration, and multi-component compound pollution, industrial odor and harmful gases have large fluctuations in air volume and concentration, and its treatment is relatively difficult. Traditional methods usually adopt several methods such as absorption, condensation, catalytic combustion, activated carbon adsorption, biological method and plasma oxidation method. In the process of exhaust gas purification, the catalytic combustion method has high purification efficiency, but the disadvantage is that the equipment is large in size, and the one-time investment and equipment operation consume a lot of energy. The adsorption method mainly uses activated carbon for adsorption, and the purification effect is ideal, but the activated carbon needs to be regenerated after the adsorption is saturated, and the regenerated waste gas still needs to be treated. The scope of application of absorption method and condensation method is limited. The investment and operating costs of the biological method are relatively low, but the operation is complicated, the floor area is large, and there is a possibility of secondary pollution. Although the plasma oxidation method has high removal efficiency of exhaust gas, its disadvantage is that harmful by-products of _O3 are produced simultaneously during the plasma radical reaction process. Therefore, the applicant proposes a purification device and method combining low-temperature plasma, microporous membrane, and spray absorption, which can suppress secondary pollution while achieving a high removal effect.

Utility model content

The purpose of the utility model is to provide a low-temperature plasma deodorization device, which has a simple structure, wide application range, high work efficiency, low energy consumption, and the efficiency of removing ammonia-hydrogen sulfide and other odorous and harmful gases can reach more than 98%.

The purpose of this utility model is achieved by the following technical solutions:

A low-temperature plasma deodorization device, characterized in that:

Including gas collection port, induced draft fan, microporous membrane dust collector, first-level spray tower, shutdown control device, low-temperature plasma purification chamber, second-level spray tower, water storage tank, submersible pump, vent and pipeline, etc. .

The gas collection port is connected to the air inlet of the induced fan, the air outlet of the induced fan is connected to the air inlet of the microporous membrane dust collector, and the air outlet of the microporous membrane dust collector is connected to the lower left air inlet of the first-stage spray tower. The air outlet at the top of the spray tower is connected to the air inlet of the low-temperature plasma purification chamber, and the air outlet of the low-temperature plasma purification chamber is connected to the air inlet at the lower left of the secondary spray tower, and finally discharged to the outside from the vent at the top of the secondary spray tower standard gas.

The water outlets at the bottom right of the first-level spray tower and the second-level spray tower are respectively connected to the water storage tank, and the water outlet of the submersible pump in the water storage tank is respectively connected to the first-level spray tower and the second-level spraying tower by PVC shunt pipes. On the sprinkler at the upper right of the tower, the spray water circulation process is realized.

There is an electric valve on the water inlet pipe of the first-level spray tower and the second-level spray tower, and the electric valve on the second-level spray tower is delayed by 30-60 hours than the electric valve on the first-level spray tower by a time relay. seconds to turn on.

The shutdown control device is an explosion gas detection alarm and temperature control device, and its detection probe is embedded in a pipe 5 times the diameter from the front end of the air inlet of the low-temperature plasma purification chamber.

The microporous membrane dust collector is a polytetrafluoroethylene microporous membrane filter bag.

The low-temperature plasma purification chamber is mainly composed of a box body, a power supply, a metal cylinder, a metal wire, a fixing rod, and a drawer-type bracket.

The power supply is located on one side of the box body, and the two poles of the power supply respectively pass through the box body and connect to the outer wall of the metal cylinder and the two ends of the metal wire.

The fixing rods are placed at both ends of the metal cylinder, and the metal wire is passed through and fixed at the axial center of the metal cylinder.

The fixing rod is perforated in the middle, the outer diameter is slightly smaller than the inner diameter of the metal cylinder, and the thickness is 2-5cm.

Compared with the prior art, the utility model has the following beneficial effects:

(1) The water in the primary spray tower first pre-treats the exhaust gas, fully absorbs volatile organic compounds, and can prevent the pipeline attachments from burning back. At the same time, it can humidify the exhaust gas to be treated, which is conducive to the generation of a certain concentration of hydroxyl radicals in the plasma treatment and enhances the degradation of the plasma exhaust gas. On the one hand, the two-stage spray tower can absorb part of the ozone and active particles produced by low-temperature plasma discharge, increase the oxidation of water, and reduce the final ozone emission; on the other hand, it can fully dissolve ozone and active particles into the water, which not only enhances the In order to ensure the overall treatment effect, the strong oxidizing properties such as ozone and free radicals are further used to continue to react with residual waste gas and water-soluble substances, which plays a supplementary role in plasma waste gas treatment. The water in the secondary spray tower is then pumped into the primary spray tower, which not only saves water, but also the water in the secondary spray tower has certain oxidative and chemical reactivity, which can play a role in comparison with pure water. Better preprocessing effect;

(2) Using polytetrafluoroethylene microporous membrane filter bag as a microporous membrane dust collector, it can not only effectively filter out impurities equivalent to PM2.5 in the odorous and harmful gas to be treated, but also reduce the flow rate of the gas, Prolong the residence time of the gas to be treated in the low-temperature plasma purification chamber to enhance the treatment effect;

(3) The device has the characteristics of compact components, small footprint, wide application range, high working efficiency, low energy consumption, the efficiency of removing ammonia-hydrogen sulfide and other odorous and harmful gases can reach more than 98%, and low working noise.

Description of drawings

Fig. 1 is a structural schematic block diagram of the utility model

Detailed ways

Below in conjunction with accompanying drawing 1 the utility model is described further:

A low-temperature plasma deodorization device, as shown in Figure 1, comprises a gas collection port (1), an induced draft fan (2), a microporous membrane dust collector (3), a primary spray tower (4), a shutdown control It consists of a device (5), a low-temperature plasma purification chamber (6), a secondary spray tower (7), a water storage tank (8), a submersible pump (9), an air vent (10) and pipelines. The gas collection port (1) is connected with the air inlet of the induced draft fan (2), and the air outlet of the induced draft fan (2) is connected with the air inlet of the microporous membrane dust collector (3), and the microporous membrane dust collector (3) The gas outlet of the primary spray tower (4) is connected to the lower left air inlet of the primary spray tower (4), and the top gas outlet of the primary spray tower (4) is connected to the air inlet of the low-temperature plasma purification chamber (6). The air outlet of the purification chamber (6) is connected with the lower left air inlet of the secondary spray tower (7), and finally the gas reaching the standard is discharged to the outside from the top vent (10) of the secondary spray tower (7). Wherein, the lower right water outlets of the first-level spray tower (4) and the second-level spray tower (7) are respectively connected with any side of the water storage tank (8), and the submersible pump (9) in the water storage tank (8) ) is connected to the first-level spray tower (4) and the sprinkler on the upper right side of the second-level spray tower (7) respectively by PVC shunt pipes to realize the spray water circulation process. The water inlet pipes of the first-level spray tower (4) and the second-level spray tower (7) are respectively provided with an electric valve, and the electric valve on the second-level spray tower (7) is controlled by a time relay. The electric valve on the tower (4) delays opening in 30-60 seconds. The detection probe of the shutdown control device (5) is embedded in a pipeline 5 times the pipe diameter away from the front end of the air inlet of the low-temperature plasma purification chamber (6).

The process flow is as follows: firstly, the odorous and harmful gas collected from the gas collection port (1) is pumped by the induced draft fan (2) to the microporous membrane dust collector (3) to remove impurities, and the gas after dust removal enters the first-level spraying The tower (4) is washed with water to absorb part of the volatile organic compounds, and the absorption liquid is returned to the water storage tank (8), and the unabsorbed odorous and harmful gases enter the low-temperature plasma purification chamber (6) to decompose the odorous and harmful gases. The final gas enters the secondary spray tower (7) for secondary absorption, and the absorption liquid returns to the water storage tank (8), and the up-to-standard gas is finally discharged to the atmosphere through the vent (10) of the device to realize the removal of odorous and harmful gases. Purification process.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. Any equivalent replacement or change of the new technical solution and its inventive concept shall be covered by the protection scope of the present utility model.

Claims (5)

1. a low temperature plasma deodorizing device, it is characterized in that, comprise the compositions such as gas collection mouth, air-introduced machine, microporous barrier deduster, one-level spray column, stop control apparatus, plasma purification storehouse, secondary spray column, water storage box, immersible pump, drain and pipeline; Described gas collection mouth is connected with fan inlet, fan out draft is connected with microporous barrier deduster air inlet, microporous barrier deduster gas outlet is connected with the lower left air inlet of one-level spray column, gas outlet, one-level spray column top is connected with plasma purification storehouse air inlet, gas outlet, plasma purification storehouse is connected with secondary spray column lower left air inlet, finally by secondary spray column top drain outwardly emission compliance gas; Described one-level spray column, secondary spray column lower right delivery port are connected with water storage box respectively, and the immersible pump delivery port in water storage box is connected on one-level spray column, the top-right spray thrower of secondary spray column respectively by PVC isocon, realizes shower water cyclic process; Described one-level spray column, secondary spray column water inlet pipe respectively have an electrically operated valve, and the electrically operated valve controlled on secondary spray column by the time relay is opened than the electrically operated valve time delay 30-60 on one-level spray column second; Described stop control apparatus is a kind of exploded gas detection alarm and temperature control equipment, and its detection probe is embedded in distance 5 times, air inlet front end, plasma purification storehouse caliber pipeline far away.

2. a kind of low temperature plasma deodorizing device as claimed in claim 1, is characterized in that: described microporous barrier deduster is a kind of polytetrafluoroethylmicroporous microporous membrane filter bag.

3. a kind of low temperature plasma deodorizing device as claimed in claim 1, it is characterized in that: described plasma purification storehouse, it is primarily of casing, power supply, metal cylinder, wire, and hold-down bars, drawer type support are formed.

4. a kind of low temperature plasma deodorizing device as claimed in claim 3, is characterized in that: described power supply is positioned at casing side, and two poles is each passed through outer wall and the wire two ends of casing connection metal cylinder; Described hold-down bars is placed in metal cylinder two ends, is run through by wire and is fixed on the shaft core position of metal cylinder.

5. a kind of low temperature plasma deodorizing device as claimed in claim 3, is characterized in that, described hold-down bars is middle perforation, and external diameter is slightly less than metal cylinder internal diameter, the barred body silicon rubber of thickness 2-5cm.