CN103817004A - High gas speed and high efficiency wet-type electrofiltration device for deep treatment of PM2.5 - Google Patents

Abstract

The invention relates to a high-gas-velocity and high-efficiency wet-type electric filter equipment for PM2.5 deep treatment, including a main casing and an electrode separation device arranged in the main casing. The lower part of the main casing is provided with a lower air chamber, and the upper part is provided with an upper air chamber The lower air chamber is provided with exhaust gas inlet and sewage outlet, the connection between the lower air chamber and the main shell is provided with a gas distribution device, and the top of the upper air chamber has an exhaust port; the electrode separation device includes a cathode device, an anode device and Power supply device; the anode device is a honeycomb conductive composite material tube bundle; the cathode device includes a cathode connecting plate located in the upper air chamber and a number of cathode wires suspended on the cathode connecting plate, and the cathode wires are respectively threaded through the honeycomb conductive composite material tube bundle , a weight is connected to the lower end of each cathode lead. The invention has a very ideal trapping effect on fine/viscous/high resistivity ratio PM2.5 dust, aerosol, fine metal particles and dioxin.

Description

PM2.5 deep treatment high-speed high-efficiency wet electric filter equipment

technical field

The invention relates to the technical field of electric dust removal equipment, in particular to a high-gas-velocity and high-efficiency wet electric filter equipment for PM2.5 deep treatment.

Background technique

"China is currently one of the areas with the most serious PM2.5 pollution in the world." The PM2.5 index of London, which has the worst air pollution in history, is about 10 to 20 micrograms per cubic meter, while Beijing reached 90 micrograms per cubic meter at its peak. About 50 micrograms per cubic meter in Guangzhou and other cities. PM2.5 fine particles are carriers of viruses, bacteria, and harmful substances. The physiological structure of the human body determines that there is no ability to filter or block PM2.5. After desulfurization and denitrification in petroleum, chemical, electric power, metallurgy, cement, textile, biology, pharmaceutical and other industries, the wet flue gas contains a large amount of fine dust, aerosol, acid mist, heavy metal and other fine particle pollutants (PM2.5). Smog requires a kind of environmental protection technology and equipment with good dust removal effect.

At present, the domestic dust removal equipment for capturing combustion source particles mainly includes: mechanical dust collector, bag dust collector, electrostatic precipitator, electric bag composite dust collector, etc. However, these devices can only remove pollutants with a minimum particle size of 40-50 μm, and liquid droplets with a particle size of less than 40 μm, fine dust, and aerosol particles cannot be removed. That is, it has no effect or poor effect on PM2.5 fine particles.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the technical problem that it is difficult to remove fine particle pollutants in the prior art, and provide a high-gas-velocity and high-efficiency wet electric filtration equipment for PM2.5 deep treatment, which can effectively and efficiently remove fine particle pollutants.

The technical solution adopted by the present invention to solve the technical problem is: a high-gas-velocity high-efficiency wet-type electric filter equipment for PM2.5 deep treatment, including a main casing and an electrode separation device arranged in the main casing, the main casing The lower part is provided with a lower air chamber, the upper part is provided with an upper air chamber, the lower air chamber is provided with a waste gas inlet and a sewage outlet, and the connection between the lower air chamber and the main shell is provided with a gas distribution device. The top of the gas chamber has an exhaust port; the electrode separation device includes a cathode device, an anode device and a power supply device; the anode device is a honeycomb conductive composite tube bundle; the cathode device includes a cathode device located in the upper gas chamber A connection plate and a plurality of cathode wires suspended on the cathode connection plate, the cathode wires are arranged in the honeycomb conductive composite tube bundle one by one, and a weight is connected to the lower end of each cathode wire; the power supply device includes An insulating box located on the top of the upper air chamber, the insulating box is provided with an electric energy introduction device, and the electric energy introduction device is connected to the cathode connecting plate through wires.

Further, the upper air chamber is also provided with a spraying device for improving the electrical conductivity in the main casing. It is beneficial to increase the moisture in the flue gas flow and enhance the conductivity, and accelerate the migration speed of dust particles in the corona area to the anode.

Further, in order to make the gas pass through the electrode separation device more uniformly, the gas distribution device includes a gas guide plate and a gas distribution plate, and the gas distribution plate is located on the upper part of the gas guide plate.

Further, in order to prevent the weights from shaking, a fixing device is provided between the weights. Avoid the shaking of the cathode wire due to the flushing of the high-velocity air flow, resulting in a reduction in dust removal efficiency.

Further, the insulating box is provided with a positive pressure protection device that blows hot air into the insulating box. Prevent hot smoke, fine dust, and mist from entering, ensure more reliable insulation of the cabinet, and effectively avoid the occurrence of "pollution flashover".

The beneficial effects of the present invention are that the PM2.5 deep treatment high-speed high-efficiency wet electric filter equipment of the present invention is effective for fine/viscous/high-resistance ratio PM2.5 dust, aerosol, fine metal particles and dioxins, etc. Very ideal collection effect; it has the advantages of high temperature resistance, strong conductivity, high demisting efficiency, good flame retardancy, short processing, manufacturing and installation cycle, compact structure, stable performance, and long service life.

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Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a half-sectional view of a preferred embodiment of the PM2.5 deep control high-speed high-efficiency wet electric filter equipment of the present invention;

Fig. 2 is a structural diagram of a honeycomb conductive composite material tube bundle and a cathode wire.

In the figure: 1. Main shell, 2. Lower air chamber, 21. Waste gas inlet, 22. Sewage outlet, 3. Upper air chamber, 31. Exhaust port, 4. Gas distribution device, 41. Gas deflector, 42. Gas distribution plate, 5. Electrode separation device, 51. Honeycomb conductive composite tube bundle, 52. Cathode connection plate, 53. Cathode wire, 54. Weight, 6. Insulation box.

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Detailed ways

The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

As shown in Figures 1 and 2, a high-efficiency wet-type electric filter equipment for PM2.5 deep treatment of the present invention includes a main casing 1 and an electrode separation device 5 arranged in the main casing 1. The described The lower part of the main housing 1 is provided with a lower air chamber 2, and the upper part is provided with an upper air chamber 3. The lower air chamber 2 is provided with a waste gas inlet 21 and a sewage outlet 22. The connection between the lower air chamber 2 and the main housing 1 A gas distribution device 4 is provided at the top of the upper gas chamber 3 with an exhaust port 31; the electrode separation device 5 includes a cathode device, an anode device and a power supply device; the anode device is a honeycomb conductive composite Material tube bundle 51; the cathode device includes a cathode connection plate 52 located in the upper air chamber and a number of cathode wires 53 suspended on the cathode connection plate 52, and the cathode wires 53 are respectively threaded through the honeycomb conductive composite material In the tube bundle 51, the lower end of each cathode wire 53 is connected to a weight 54; the power supply device includes an insulating box 6 located on the top of the upper air chamber 3, and the insulating box 6 is provided with an electric energy introduction device, and the described The electric energy introduction device is connected with the cathode connecting plate 52 through wires.

Further, the upper air chamber 3 is also provided with a spray device 7 for improving the electrical conductivity in the main casing 1 . It is beneficial to increase the moisture in the flue gas flow and enhance the conductivity, and accelerate the migration speed of dust particles in the corona area to the anode.

Further, in order to make the gas pass through the electrode separation device 5 more uniformly, the gas distribution device 4 includes a gas guide plate 41 and a gas distribution plate 42, and the gas distribution plate 42 is located on the upper part of the gas guide plate 41 .

Further, in order to prevent the weight 54 from driving the cathode wire 53 to shake, a fixing device is provided between the weights 54 . To prevent the cathode wire 53 from shaking due to the washing of the high-velocity air flow, resulting in a reduction in dust removal efficiency.

Further, the insulating box 6 is provided with a positive pressure protection device that blows hot air into the insulating box. Prevent hot smoke, fine dust, and mist from entering, ensure more reliable insulation of the cabinet, and effectively avoid the occurrence of "pollution flashover".

Introduce the present invention below in conjunction with concrete use, exhaust gas is introduced into lower air chamber 2 from exhaust gas inlet 21; Then, exhaust gas flows upwards and enters in the honeycomb conductive composite tube bundle 51; Then, the high-voltage direct current of 55-72 kilovolts passes through electric energy introducer Lead to the negative wire 53 to make it generate corona discharge, maintain an electric field sufficient to ionize the gas, and ionize the gas between the cathode wire 53 and the honeycomb conductive composite tube bundle 51 into negative ions and free electrons, dust, acid mist When the particles encounter electrons to generate charge, according to the principle of same-sex repulsion and opposite-sex attraction, charged dust and acid mist droplets should move to the electrode with the opposite polarity, positive ions move to the corona electrode, and negative ions and electrons Move to the inner wall of the honeycomb conductive composite tube bundle 51, fall down the wall by its own weight, fall into the lower air chamber 2 of the electric filter equipment and discharge it from the sewage outlet 22, so that the exhaust gas is purified; finally the purified exhaust gas enters the upper air chamber, from the exhaust port.

The invention is applied to the wet desulfurization and denitrification process with large flue gas volume and high gas velocity of 1.6-3.2m/s, and is used for the comprehensive treatment of fine dust, aerosol, acid mist, heavy metals and other pollutants (PM2.5), dust removal The efficiency is greater than 95%, and the flue gas outlet concentration is less than 20mg/Nm ³ .

Inspired by the above-mentioned ideal embodiment according to the present invention, through the above-mentioned description content, relevant workers can make various changes and modifications within the scope of not departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, but must be determined according to the scope of the claims.

Claims (5)

1. A PM2.5 deep control high-speed high-efficiency wet electric filter equipment, characterized in that it includes a main casing and an electrode separation device arranged in the main casing, and the lower part of the main casing is provided with a lower air chamber , The upper part is provided with an upper air chamber, the lower air chamber is provided with a waste gas inlet and a sewage outlet, the connection between the lower air chamber and the main shell is provided with a gas distribution device, and the top of the upper air chamber has an exhaust mouth; The electrode separation device includes a cathode device, an anode device and a power supply device; The anode device is a honeycomb conductive composite tube bundle; The cathode device includes a cathode connection plate located in the upper air chamber and a plurality of cathode wires suspended on the cathode connection plate, and the cathode wires are arranged in the honeycomb conductive composite tube bundle one by one, and each cathode wire A heavy hammer is connected to the lower end; The power supply device includes an insulating box located on the top of the upper air chamber, and an electric energy introduction device is arranged inside the insulating box, and the electric energy introduction device is connected to the cathode connecting plate through wires. 2. The PM2.5 deep treatment high-speed high-efficiency wet electric filter equipment according to claim 1, characterized in that: the upper air chamber is also equipped with a spray device for improving the conductivity of the main casing. 3. The PM2.5 deep treatment high-speed high-efficiency wet-type electric filtration equipment according to claim 1, characterized in that: the gas distribution device includes a gas deflector and a gas distribution plate, and the gas distribution plate is located at The upper part of the gas deflector. 4. The PM2.5 advanced treatment high-speed high-efficiency wet electric filter equipment according to claim 1, characterized in that: there is a fixing device between the weights. 5. The high-gas-velocity and high-efficiency wet electric filter equipment for advanced PM2.5 treatment according to claim 1, characterized in that: the insulation box is provided with a positive pressure protection device that blows hot air into the insulation box.

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