Waste gas dedusting and deodorizing integrated device

Abstract

The utility model relates to a dust removal and deodorization integrated device for waste gas. A purification device comprises a main fan, an air inlet, an air distribution plate, a wet electric dust removal reaction area, a spraying layer, a plasma reaction area, an air outlet, a plasma power supply, a wet electric power supply and a drain outlet. The main fan is connected to an air inlet of the integrated device through an air pipe, an air distribution plate, a wet electric dust removal reaction area, a spraying layer, a plasma reaction area and an air outlet are sequentially arranged in a cavity of the device, a wet electric power source is connected into the wet electric dust removal reaction area through a high-voltage cable, and a narrow pulse power source is connected into the plasma reaction area through a high-voltage cable. The device disclosed by the utility model has the advantages of high purification efficiency for malodorous waste gas, small occupied area, convenience in installation and no secondary pollution.

Description

Technical Field

[0001] The invention relates to the field of environmental engineering waste gas treatment, and in particular to an integrated waste gas purification device, and in particular to an integrated waste gas dust removal and deodorization device. Background Art

[0002] For the treatment of malodorous gases, the commonly used deodorization methods currently include chemical deodorization (ozone oxidation, photocatalytic oxidation, ferrate scrubber), biological deodorization (biofilter, biotrickling filter, bio-scrubbing device), and ion deodorization (plasma deodorization equipment, high-energy ion deodorization equipment, photohydrogen ion deodorization equipment).

[0003] Most of the equipment used in the existing malodorous gas treatment technology has the defects of large space occupation, high investment, complex operation, unstable operation, limited purification effect, and easy to produce secondary pollution. For malodorous gases with high concentrations, the chemical oxidation deodorization method is to use strong oxidants such as ozone, permanganate, hypochlorite, chlorine, chlorine dioxide, hydrogen peroxide and other strong oxidants to oxidize malodorous substances and convert them into odorless or low-odor substances. During the oxidation process, the concentration of waste gas pollutants is high, resulting in the inability of the oxidant to completely oxidize these pollutants, and a large part of the malodorous pollutants are chemically stable and cannot directly react with the oxidant. In addition, the unused residual oxidant itself will cause air pollution. The biological method is used to remove harmful substances in malodorous pollutants, and the metabolism of microorganisms is used to make the malodorous substances in the gas dissolve in water when passing through the biological treatment device, and then be degraded by microorganisms. Its advantages are simple equipment structure, high purification efficiency, and no secondary pollution, but the equipment occupies a large area, is complex to operate, and has high operating costs. Plasma treatment of odorous gases utilizes the action of high-energy electrons to convert energy into the internal energy or kinetic energy of pollutant molecules through collision. These molecules that gain energy are excited or ionized to form broken-chain small molecule pollutants. At the same time, the oxygen and water in the air can also produce a large number of new ecological hydrogen, ozone, hydroxyl free radicals and other active groups under the action of high-energy electrons. The highly active small molecule pollutants formed by the ionization and chain breaking of odorous molecules undergo oxidation reactions with the active groups with high energy to achieve the purpose of waste gas deodorization. However, in addition to odorous molecules, the waste gas often contains a large number of dust particles, aerosols and other components, which will hinder the contact between high-energy plasma and odorous molecules and consume a large amount of plasma energy, thereby greatly weakening its deodorization ability. Summary of the invention

[0004] The purpose of the present invention is to invent an efficient integrated waste gas dust removal and deodorization device, which can treat the pollution factors of different components in the malodorous waste gas in a graded and segmented manner, improve the complex process flow of traditional treatment technology, optimize the structure of the purification equipment, reduce the equipment footprint, improve the purification efficiency of the device, and save the investment cost of the deodorization project.

[0005] The implementation method of the present invention is an integrated dust removal and deodorization device, characterized by comprising a main fan, an air inlet, an air distribution plate, a wet electrostatic precipitator reaction zone, a spray layer, a plasma reaction zone, an air outlet, a plasma power supply, a wet electric power supply, and a sewage outlet. The bottom of the integrated device is provided with an air inlet, and the interior of the device chamber is provided with an air distribution plate, a wet electrostatic precipitator reaction zone, a spray layer, a plasma reaction zone and an air outlet in sequence. The wet electric power supply is connected to the wet electrostatic precipitator reaction zone through a high-voltage cable, and the narrow pulse power supply is connected to the plasma reaction zone through a high-voltage cable.

[0006] Preferably, the main fan is connected to the air inlet at the bottom of the integrated dust removal and deodorization device through an air duct to introduce the exhaust gas into the chamber of the device for purification;

[0007] Preferably, the air distribution plate is mainly used to evenly distribute the exhaust gas entering the chamber, ensuring that the exhaust gas passes through the subsequent purification reaction zone evenly inside the chamber of the purification device;

[0008] Preferably, the power supply of the wet electrostatic precipitator reaction zone is a high-frequency and high-voltage precipitator power supply or a constant-current industrial frequency power supply;

[0009] Preferably, the power supply of the plasma reaction zone is a nanosecond narrow pulse high voltage power supply;

[0010] The integrated device for exhaust gas dust removal and deodorization comprises the following steps:

[0011] (1) The malodorous waste gas is sent into the cavity of the purification device through the main fan, and the waste gas is evenly passed through the rear purification area under the action of the air distribution plate;

[0012] (2) After the exhaust gas enters the wet electrostatic precipitator reaction zone, the dust particles and aerosol factors in the exhaust gas are electrostatically adsorbed and settled;

[0013] (3) The waste gas after dust removal enters the plasma reaction zone, where the gaseous odor molecules in the waste gas are cracked and oxidized by high-energy ions and converted into odorless or low-odor molecules;

[0014] (4) The waste gas that has been treated with dust removal and deodorization is discharged to the outside through the air outlet of the purification device in compliance with the standards;

[0015] (5) A spray layer is provided at the top of the wet electrostatic precipitator reaction zone and the plasma reaction zone, which can be sprayed and cleaned regularly.

[0016] Keep the purification unit clean for a long time and ensure the long-term, efficient and stable operation of the purification device.

[0017] Preferably, the above step (3) is to complete the removal of dust particles and aerosol components in the exhaust gas through step (2), so that when the exhaust gas is in the plasma reaction zone stage, most of the huge energy released by the high-voltage plasma electric field acts on the water molecules, oxygen and odor molecules contained in the exhaust gas, generating a large number of hydroxyl free radicals, active oxygen and broken chain odor small molecules, thereby ensuring the deodorization effect on the odorous exhaust gas.

[0018] The purification principle of malodorous waste gas of the present invention is that the waste gas first passes through the wet electrostatic precipitator reaction zone. Under the action of the high-voltage electrostatic field, the dust particles and aerosol components contained in the waste gas are charged and adsorbed on the electrode plate, thereby achieving the removal of dust particles and aerosol factors in the waste gas. Then the waste gas enters the plasma reaction zone. Under the action of a narrow pulse plasma power supply, the air around the reaction zone is ionized to generate high-energy plasma. The gaseous malodorous molecules in the waste gas are cracked and oxidized by the high-energy ions and converted into odorless and low-odor molecules, thereby achieving the effect of dust removal and deodorization of malodorous waste gas.

[0019] The beneficial effects of the present invention are:

[0020] 1. Adopt the grading and segmentation treatment of dust removal first and then deodorization, first electrostatic dust removal and then plasma purification and deodorization, effectively remove dust particles in the flue gas, make full use of plasma energy, improve the cracking and oxidation efficiency of gaseous pollutants, and improve the overall dust removal and deodorization effect of the device;

[0021] 2. The wet electrostatic precipitator reaction zone and the plasma reaction zone are set in the same chamber, with an integrated design and compact structure, which reduces the floor space of the purification device and simplifies the workload of on-site installation of the purification device;

[0022] 3. Spray layers are set in the reaction areas to realize automatic cleaning of the device and avoid the reduction of purification efficiency due to fouling and scaling of the purifier. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention.

[0024] In the figure: 1-main fan, 2-air inlet, 3-air distribution plate, 4-wet electrostatic precipitator reaction zone, 5-spray layer, 6-plasma reaction zone, 7-spray layer, 8-air outlet, 9-plasma power supply, 10-wet electrostatic power supply, 11-sewage outlet. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] like Figure 1As shown, the present invention includes a main fan 1, an air inlet 2, an air distribution plate 3, a wet electrostatic precipitator reaction zone 4, a spray layer 5, a plasma reaction zone 6, a spray layer 7, an air outlet 8, a plasma power supply 9, a wet electric power supply 10, and a sewage outlet 11. The main fan 1 is connected to the air inlet 2 of the purification device through an air duct, and the interior of the chamber is composed of the air distribution plate 3, the wet electrostatic precipitator reaction zone 4, the spray layer 5, the plasma reaction zone 6, the spray layer 7, and the air outlet 8 from bottom to top. The plasma power supply 9 is connected to the plasma reaction zone 6 through a high-voltage cable, and the wet electric power supply 10 is connected to the wet electrostatic precipitator reaction zone 4 through a high-voltage cable.

[0027] After being collected, the malodorous gas enters the air inlet 2 of the integrated dust removal and deodorization equipment under the action of the main fan 1, first passes through the air distribution plate 3 for uniform air distribution, and then enters the wet electrostatic precipitator reaction zone 4. Under the action of the wet electric power supply 10, the entire dust removal reaction zone 4 generates a high-voltage electrostatic field. When the exhaust gas passes through this area, the dust particles and aerosol components contained in the exhaust gas are charged and adsorbed on the electrode plate, thereby removing the dust particles and aerosol factors in the exhaust gas, and then enters the plasma reaction zone 6. Under the power supply of the plasma power supply 9, the plasma reaction zone 6 generates a high-voltage plasma electric field, and the surrounding air is ionized to generate high-energy plasma. When the exhaust gas passes through this area, the dust particles and aerosol components contained in the exhaust gas are charged and adsorbed on the electrode plate, thereby removing the dust particles and aerosol factors in the exhaust gas. When the waste gas enters the plasma reaction zone 6, the gaseous malodor molecules in the waste gas are cracked and oxidized by high-energy ions and converted into odorless and low-odor molecules. Since the waste gas first passes through the dust removal reaction zone 4 to complete the removal of dust particles and aerosol components, most of the huge energy released by the high-voltage plasma electric field in the plasma reaction zone 6 acts on the water molecules, oxygen and malodor molecules contained in the waste gas, generating a large number of hydroxyl free radicals, active oxygen and broken chain malodor small molecules, ensuring the deodorization effect of the malodorous waste gas. After wet electrostatic precipitator + plasma cracking and oxidation, the waste gas is discharged to the outside through the air outlet 8 in compliance with the standards. The spray layer 5 and the spray layer 7 can be set to open at a fixed time to flush the stains and dust adsorbed on the reaction zone plates, keep the reaction zone plates clean, and ensure the long-term stable operation of the device. The wastewater generated by flushing is discharged into the sewage well through the sewage outlet 11.

[0028] The above is only a brief description of the embodiments of the present invention, and is not intended to limit the present invention. The present invention may have many variations, and any variation made by any technician in the same profession based on the present invention is considered to fall within the protection scope of the present invention.

Claims

1. An integrated device for dust removal and deodorization of waste gas, characterized in that: The integrated device comprises a main fan, an air inlet, an air distribution plate, a wet electrostatic precipitator reaction zone, a spray layer, a plasma reaction zone, an air outlet, a plasma power supply, a wet electrostatic power supply and a sewage outlet. The bottom of the integrated device is provided with an air inlet, and the interior of the device chamber is provided with an air distribution plate, a wet electrostatic precipitator reaction zone, a spray layer, a plasma reaction zone and an air outlet in sequence. The wet electrostatic power supply is connected to the wet electrostatic precipitator reaction zone through a high-voltage cable, and the narrow pulse power supply is connected to the plasma reaction zone through a high-voltage cable.

2. The integrated dust removal and deodorization device according to claim 1, characterized in that: The main fan is connected to the air inlet at the bottom of the integrated dust removal and deodorization device through an air duct, and the exhaust gas is introduced into the chamber of the device for purification.

3. The integrated dust removal and deodorization device according to claim 1, characterized in that: The air distribution plate is mainly used to evenly distribute the exhaust gas entering the chamber, ensuring that the exhaust gas passes through the subsequent purification reaction zone evenly inside the chamber of the purification device.

4. The integrated dust removal and deodorization device according to claim 1, characterized in that: The power supply of the wet electrostatic precipitator reaction zone is a high-frequency and high-voltage precipitator power supply or a constant-current industrial frequency power supply.

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