CN104815758B - A kind of drum type brake half wet process electrostatic precipitator - Google Patents

Abstract

A cylindrical semi-wet electrostatic precipitator belongs to the technical field of exhaust gas treatment and environmental protection. The method is to place the cylindrical dust collecting pole horizontally, place the corona pole outside the central axis, immerse the lower part of the cylindrical dust collecting pole in the aqueous solution, and keep rotating the cylindrical dust collecting pole to ensure that the surface of the dust collecting pole is always wetted by the aqueous solution , when the catering exhaust gas containing oil droplets enters the electrostatic precipitator, the oil droplets and particles in it are captured by the liquid film on the surface of the cylindrical dust collector, and when the cylindrical dust collector rotates to the lower aqueous solution, the Trapped oil droplets and particles are eluted. The electrostatic precipitator solves the problem that the common electrostatic precipitator has accumulated oil stains and is difficult to clean.

Description

A cylindrical semi-wet electrostatic precipitator

technical field

The invention relates to a cylindrical semi-wet electrostatic precipitator, which belongs to the technical field of exhaust gas treatment and environmental protection.

Background technique

With the rapid development of my country's economy, the haze air pollution in large and medium-sized cities, economically developed areas and areas with intensive basic industries in my country is becoming more and more serious. As my country's restrictions on SOx and NOx emissions become increasingly stringent, and related environmental protection technologies and devices continue to be put into use, the total emissions of SOx and NOx pollutants in my country's atmospheric environment have decreased year by year. However, from the current monitoring results, my country's Yangtze River Delta The haze pollution in the Pearl River Delta and Beijing-Tianjin-Hebei areas has not been significantly reduced, and has seriously threatened the health of the people and the sustainable development of the economy.

With the progress of traceability research on my country's current atmospheric haze pollution, oil droplets and VOCs emissions caused by catering are gradually being understood and valued by people. Many cooking methods with Chinese characteristics (frying, frying, deep-frying) can produce direct emissions of organic aerosols to the atmosphere. This kind of emissions mostly occurs in densely populated areas and the emission time is very concentrated, so this kind of pollution will deteriorate the local air quality. has a considerable effect. At present, the purification and treatment of catering waste gas has shown significant technical needs.

Catering exhaust gas contains a large number of oil droplets and VOCs. The oil droplets have a high viscosity due to high temperature oxidation. After cooling down, it is easy to form a continuous oil film on the surface of the adsorption material, blocking the filtration gap and adsorption pores of the material, which leads to the filtration of the filter membrane. Materials such as activated carbon and activated carbon are not effective in the treatment of catering waste gas. In addition, common catering companies have already installed exhaust devices, so the pressure drop of the gas available for the waste gas treatment module is very limited, and the area occupied by the module is often not guaranteed. Therefore, the module for catering waste gas treatment needs to have both pressure drop and land occupation. Small and flexible and convenient features.

Electrostatic precipitator technology is regarded as an important technology for treating catering exhaust gas due to its small air resistance, and this technology has also achieved good application results in the removal of mist droplets. At present, many environmental protection companies dedicated to the treatment of catering waste gas have regarded the electrostatic precipitator solution as the most reliable and mature technical solution. Similar to the general electrostatic precipitator, the electrostatic precipitator technology used for catering waste gas treatment also uses the corona electrode to charge the oil droplets and particles in the exhaust gas, and then the oil droplets and particles will settle on the dust collector plate under the action of electrostatic force on, thereby completing the removal of oil droplets and particles. However, unlike ordinary industrial electrostatic precipitators, viscous oil droplets and particles settle on the plates during the treatment of catering waste gas electric precipitators, which will form a viscous oil film on the dust collectors, which is difficult to detect by physical means. Therefore, the electrostatic precipitator needs to be regularly disassembled and cleaned to clean the viscous oil on the dust collector, which brings inconvenience to the long-term stable dust removal operation. In addition, when there is a lot of oil deposition, the formed continuous oil film is likely to conduct between the corona electrode and the dust collector inside the equipment, resulting in cremation discharge and possible fire. Therefore, most of the mature electrostatic precipitators used for catering waste gas treatment are equipped with fire alarm devices inside.

How to give full play to the advantages of excellent effect and small pressure drop of the electrostatic precipitator while avoiding the disadvantages that the plates are difficult to clean and easy to cause fire? This is a difficult problem currently facing researchers in the field of catering waste gas treatment technology. In the present invention, a cylinder whose lower part is submerged under the liquid surface of the absorption liquid and continuously rotates is used as the dust collecting pole, which can successfully solve the problem of cleaning the dust collecting pole with oil dirt. Fire hazard due to spark discharge.

Contents of the invention

The object of the present invention is to obtain a new type of semi-wet electrostatic precipitator with low air resistance, high flux and high oil removal ability by using the rotating cylinder submerged under the liquid surface of the absorption liquid as the dust collector. This module does not need to clean the dust collector, and only needs to replace the absorption liquid after a period of operation. In addition, since the oil stain is dispersed in the absorption liquid, the hidden danger of fire in the dust collector is completely eliminated, and it is very suitable for the aerosol in the cooking fume. Droplets are removed.

A cylindrical semi-wet electrostatic precipitator provided by the present invention is realized through the following technical scheme: gears and two sets of wheel belts are installed on the outside of a cylindrical conductive cylindrical dust collecting pole, and the The cylindrical dust collector is placed horizontally on two sets of supporting wheels, and each set of supporting wheels is composed of two supporting wheels. The cylindrical dust collecting pole can be realized by the transmission of the power gear meshed with the external gear of the cylindrical dust collecting pole. The rotating speed of the cylindrical dust collecting pole is 0.01~5 rpm, the aspect ratio of the cylindrical dust collecting pole is between 1:1~10:1, and two right angles are placed at the two ends of the cylindrical dust collecting pole. Tee, the right-angle nozzles of the two right-angle tees are respectively connected to the two ends of the cylindrical dust collector, and there is a dynamic sealing surface between the nozzles of the right-angle tee and the nozzle of the cylindrical dust collector to ensure a round There is no air leakage between the cylinder dust collector and the right angle tee when the cylinder dust collector rotates but the right angle tee does not rotate. A corona electrode is installed between the two right angle tees, and the corona electrode and the cylinder dust collector The central axis of the corona pole coincides with each other, and the two ends of the corona pole are respectively fixed on the outer walls of the straight pipe sections of the two right-angle tees through insulating ceramics and fasteners to ensure the insulation between the corona pole and the right-angle tee pipe. One end of the tube protrudes out of the right-angle tee and is connected to an external high-voltage power supply. The power supply voltage is between 1kV and 80kV. Both positive corona and negative corona are acceptable. The entire device above is placed in the absorption liquid tank, and the liquid surface of the absorption liquid is immersed in the circle. The vertically downward nozzles of the right-angled tees at both ends of the cylinder dust collector submerge part of the cylinder dust collector, and the distance between the absorption liquid level and the inner lower edge of the cylinder dust collector is the inner radius of the cylinder dust collector. From 1/10 to 3/4, catering waste gas enters from the vertically upward nozzle of the right-angled tee at one end of the dust collector cylinder, and the exhaust gas is discharged from the vertically upward nozzle of the right-angled tee at the other end of the cylinder dust collector , with the continuous rotation of the cylinder, the inner wall of the cylinder is always in a wet state, and the diameter of the cylinder is between 8cm and 100cm. This cylindrical semi-wet electrostatic precipitator is also characterized in that the absorption liquid is an aqueous solution of antibacterial surfactant with a mass concentration of 0.1% to 10%, and the solute is dodecyltrimethylammonium bromide, dodecane trimethylammonium chloride, tetradecyltrimethylammonium bromide, tetradecyltrimethylammonium chloride, cetyltrimethylammonium bromide, cetyltrimethylammonium chloride Ammonium, Octadecyltrimethylammonium Bromide, Octadecyltrimethylammonium Chloride, Triclosan, Chlorhexidine Acetate, Benzalkonium Bromide, Benzalkonium Chloride, Potassium Sorbate, Pyrithione Sodium, zinc pyrithione, copper pyrithione, 1-ethyl-3-methylimidazole bromide, 1-ethyl-3-methylimidazole iodide, 1-propyl-3-methylimidazole bromide , 1-propyl-3-methylimidazole iodide, 1-butyl-3-methylimidazole chloride, 1-butyl-3-methylimidazole bromide, 1-butyl-3-methylimidazole iodide Imidazole, 1-hexyl-3-methylimidazole chloride, 1-hexyl-3-methylimidazole bromide, 1-hexyl-3-methylimidazole iodide, 1-octyl-3-methylimidazole chloride Imidazole, 1-octyl-3-methylimidazole bromide, 1-hexyl-3-methylimidazole iodide, 1-decyl-3-methylimidazole chloride, 1-decyl-3-methylimidazole bromide Imidazole, 1-decyl-3-methylimidazole iodide, 1-benzyl-3-methylimidazole chloride, 1-benzyl-3-methylimidazole bromide, 1-benzyl-3-methylimidazole iodide -Methylimidazole, 1-dodecyl-3-methylimidazole chloride, 1-dodecyl-3-methylimidazole bromide, 1-dodecyl-3-methylimidazole iodide, 1-tetradecyl-3-methylimidazole chloride, 1-tetradecyl-3-methylimidazole bromide, 1-tetradecyl-3-methylimidazole iodide, 1-decyl chloride Hexaalkyl-3-methylimidazole, 1-hexadecyl-3-methylimidazole bromide, 1-hexadecyl-3-methylimidazole iodide, p-chloro-m-xylenol, dibromosea Any one of bromochlorohydantoin, bromochlorohydantoin, dichlorohydantoin, and 5,5-dimethylhydantoin or a mixture of any several in any proportion. This cylindrical semi-wet electrostatic precipitator is also characterized in that: the material of the cylindrical dust collecting pole of the electrostatic precipitator is polyethylene plastic, polypropylene plastic, nylon plastic, ABS plastic with a layer of aluminum foil firmly pasted on the inner wall. Plastic, polycarbonate plastic, polymethyl methacrylate plastic, polypropylene plastic, polyvinyl chloride plastic, acetal plastic or polyphenylene ether plastic. The cylindrical semi-wet electrostatic precipitator is also characterized in that: the corona electrode of the electrostatic precipitator is a circular line, a star line, a zigzag line, a prickly line or a herringbone line.

Different from common electrostatic precipitators, this electrostatic precipitator deposits the oil droplets and particles of catering waste gas on the inner wall of the cylindrical dust collector with an absorbent liquid layer on the surface. With the rotation of the cylindrical dust collector, the deposited Oil stains will be washed off by the lower absorbing liquid, thus preventing oil stains from accumulating on the inner wall of the cylindrical dust collecting pole. At the same time, since the oil stains are dispersed in the absorbing liquid, the potential threat of fire caused by spark discharge is also avoided. In the process of operation, it is only necessary to replace the absorbing liquid regularly and ensure that the height of the absorbing liquid meets the requirements to ensure the stable operation of the dust collector. The function of insulating ceramic parts, cleaning the oil on the surface can prevent the occurrence of spark discharge. The cleaning work is simple and easy. Compared with the cleaning work of ordinary electrostatic precipitators, the workload is greatly reduced. In addition, since the absorption liquid contains emulsified and antibacterial solutes, the absorption liquid will not stink and deteriorate during equipment shutdown, which is very suitable for the actual situation of intermittent operations in catering enterprises.

Description of drawings

The appended drawings 1 and 2 of the specification illustrate this technical solution visually. Figure 2 does not show the external power gear that drives the cylindrical dust collector to rotate. In Figure 1 and Figure 2, 1 represents the wire connected to the external high-voltage power supply, 2 represents the insulating ceramics and fasteners at both ends of the corona electrode, and 3 Represents the right-angle tee (two in total), 4 represents the cylindrical dust collector, 5 represents the dynamic sealing surface of the cylindrical dust collector and the right-angle tee nozzle, 6 represents the wheel belt, and 7 represents the rotation of the cylindrical dust collector Gear, 8 represents the corona electrode, 9 represents the absorption liquid tank, 10 represents the wheel holder supporting the cylinder dust collection pole, 11 represents the absorption liquid, 12 represents the exhaust gas inlet flow, and 13 represents the treated clean outlet flow. For the sake of clarity, Fig. 2 does not draw the supporting roller, the absorption liquid tank, the absorption liquid surface and the dynamic sealing surface. Figures 1 and 2 show the case of only one cylindrical dust collector. When the volume of gas to be processed is large, multiple sets of cylindrical dust collectors and corresponding corona electrodes can be placed side by side at the same time. Multiple cylinders The dust collection poles are connected by gears to drive the rotation, and one of the cylindrical dust collection poles is selected to install the external power gear. As long as the output power of the power gear is sufficient, the number of cylindrical dust collection poles can be unlimited.

detailed description

The present invention provides a cylindrical semi-wet electrostatic precipitator. Gears and two sets of wheels are installed on the outside of a cylindrical conductive cylindrical dust collector, and the cylindrical dust collector is horizontally placed on the ground through the two sets of wheels. On the two sets of supporting wheels, each set of supporting wheels is composed of two supporting wheels. The rotation of the cylindrical dust collecting pole can be realized through the transmission of the power gear meshed with the external gear of the cylindrical dust collecting pole. The rotating speed of the cylinder is 0.01~5 rev/s, the length-to-diameter ratio of the cylinder dust collector is between 1:1~10:1, and two right-angle tees are placed at both ends of the cylinder dust collector. The through right-angle nozzles are respectively connected with the two ends of the cylindrical dust collector, and there is a dynamic sealing surface between the nozzles of the right-angle tee and the nozzles of the cylindrical dust collector to ensure that the cylindrical dust collector rotates and the right-angle three-way There is no air leakage between the cylindrical dust collector and the right-angle tee under the condition of not rotating. A corona electrode is set between the two right-angle tees. The central axes of the corona electrode and the cylindrical dust collector coincide. The two ends of the corona electrode are respectively fixed on the outer walls of the straight pipe sections of the two right-angle tees through insulating ceramics and fasteners to ensure the insulation between the corona electrode and the right-angle tee pipe. One end of the corona electrode extends beyond the right-angle tee And connect the external high-voltage power supply, the power supply voltage is between 1kV ~ 80kV, positive corona and negative corona can be used, the whole device above is placed in the absorption liquid tank, and the liquid surface of the absorption liquid is immersed in the right-angled triangle at both ends of the dust collecting pole of the cylinder. Through the vertically downward nozzle and submerged part of the cylindrical dust collector, the distance between the absorption liquid level and the inner lower edge of the cylindrical dust collector is 1/10 to 3/4 of the inner radius of the cylindrical dust collector. Catering exhaust gas enters from the vertically upward nozzle of the right-angled tee at one end of the dust collector cylinder, and the exhaust gas is discharged from the vertically upward nozzle of the right-angled tee at the other end of the cylinder dust collector, with the continuous rotation of the cylinder , the inner wall of the cylinder is always in a wet state, and the diameter of the cylinder is between 8cm and 100cm. This cylindrical semi-wet electrostatic precipitator is also characterized in that the absorption liquid is an aqueous solution of antibacterial surfactant with a mass concentration of 0.1% to 10%, and the solute is dodecyltrimethylammonium bromide, dodecane trimethylammonium chloride, tetradecyltrimethylammonium bromide, tetradecyltrimethylammonium chloride, cetyltrimethylammonium bromide, cetyltrimethylammonium chloride Ammonium, Octadecyltrimethylammonium Bromide, Octadecyltrimethylammonium Chloride, Triclosan, Chlorhexidine Acetate, Benzalkonium Bromide, Benzalkonium Chloride, Potassium Sorbate, Pyrithione Sodium, zinc pyrithione, copper pyrithione, 1-ethyl-3-methylimidazole bromide, 1-ethyl-3-methylimidazole iodide, 1-propyl-3-methylimidazole bromide , 1-propyl-3-methylimidazole iodide, 1-butyl-3-methylimidazole chloride, 1-butyl-3-methylimidazole bromide, 1-butyl-3-methylimidazole iodide Imidazole, 1-hexyl-3-methylimidazole chloride, 1-hexyl-3-methylimidazole bromide, 1-hexyl-3-methylimidazole iodide, 1-octyl-3-methylimidazole chloride Imidazole, 1-octyl-3-methylimidazole bromide, 1-hexyl-3-methylimidazole iodide, 1-decyl-3-methylimidazole chloride, 1-decyl-3-methylimidazole bromide Imidazole, 1-decyl-3-methylimidazole iodide, 1-benzyl-3-methylimidazole chloride, 1-benzyl-3-methylimidazole bromide, 1-benzyl-3-methylimidazole iodide -Methylimidazole, 1-dodecyl-3-methylimidazole chloride, 1-dodecyl-3-methylimidazole bromide, 1-dodecyl-3-methylimidazole iodide, 1-tetradecyl-3-methylimidazole chloride, 1-tetradecyl-3-methylimidazole bromide, 1-tetradecyl-3-methylimidazole iodide, 1-decyl chloride Hexaalkyl-3-methylimidazole, 1-hexadecyl-3-methylimidazole bromide, 1-hexadecyl-3-methylimidazole iodide, p-chloro-m-xylenol, dibromosea Any one of bromochlorohydantoin, bromochlorohydantoin, dichlorohydantoin, and 5,5-dimethylhydantoin or a mixture of any several in any proportion. This cylindrical semi-wet electrostatic precipitator is also characterized in that: the material of the cylindrical dust collecting pole of the electrostatic precipitator is polyethylene plastic, polypropylene plastic, nylon plastic, ABS plastic with a layer of aluminum foil firmly pasted on the inner wall. Plastic, polycarbonate plastic, polymethyl methacrylate plastic, polypropylene plastic, polyvinyl chloride plastic, acetal plastic or polyphenylene ether plastic. The cylindrical semi-wet electrostatic precipitator is also characterized in that: the corona electrode of the electrostatic precipitator is a circular line, a star line, a zigzag line, a prickly line or a herringbone line.

List several specific examples below, to further understand the present invention:

Example 1:

Take an aluminum cylinder with a length of 100cm and a diameter of 20cm, install gears and two sets of tires on the outside, place a polyethylene plastic tee with a diameter of 20cm on both sides, and place the two straight nozzles of the two tees vertically. Drill holes on the outside of the straight pipe sections of each tee, and pass through the corona wire. The corona wire coincides with the central axis of the cylindrical dust collecting pole. Insulating ceramics and fasteners are fixed, one end is protruded and connected to a high-voltage power supply, negative corona is selected, the power supply voltage is 30kV, gears and two sets of belts are installed on the outside of the cylindrical dust collector, and the cylindrical dust collector is horizontally placed on the two sets of brackets On the wheel, a dynamic seal is set between the two ends of the cylinder dust collector and the two tees. When the cylinder dust collector rotates and the tee does not move, there is no air leakage. The electrostatic precipitator is immersed in 0.1wt% benzene In the aqueous solution of ammonium bromide, the distance between the liquid surface and the lower edge of the inner wall of the cylinder dust collector is 2cm, and the rotational speed of the cylinder dust collector is 1 revolution/second. The interception efficiency of droplets with a diameter of 2 μm exceeds 95%.

Example 2:

Take an aluminum cylinder with a length of 100cm and a diameter of 8cm, install gears and two sets of tires on the outside, place a polyethylene plastic tee with a diameter of 20cm on both sides, and place the two straight-through nozzles of the two tees vertically. Drill holes on the outside of the straight pipe sections of each tee, and penetrate the corona wire. The corona wire coincides with the central axis of the cylindrical dust collector. Choose a circular wire with a nominal diameter of 0.2mm, and fix both ends on the outer side of the tee. Fix with insulating ceramics and fasteners, one end protrudes and connects to high-voltage power supply, choose negative corona, power supply voltage is 10kV, install gears and two sets of tires on the outside of the cylindrical dust collector, and place the cylindrical dust collector horizontally on the two sets On the supporting wheel, a dynamic seal is set between the two ends of the cylinder dust collector and the two tees. When the cylinder dust collector rotates and the tee does not move, there is no air leakage. The electrostatic precipitator is immersed in 0.8wt% In the aqueous solution of dichlorohydantoin, the distance between the liquid surface and the lower edge of the inner wall of the cylinder dust collection pole is 3cm, and the rotational speed of the cylinder dust collection pole is 0.01 rpm. For droplets with a particle size of 2 μm, the interception efficiency exceeds 97%.

Example 3:

Take a polyethylene cylinder with a length of 100cm and a diameter of 100cm, paste a layer of aluminum foil inside, install gears and two sets of tires on the outside, place an ABS plastic tee with a diameter of 100cm on both sides, and two straight-through pipes for the two tees The mouth is placed vertically, the outer side of the straight pipe section of the two tees is punched, and the corona wire is inserted into the corona wire. The corona wire coincides with the central axis of the cylindrical dust collecting pole. The external test of the pass is fixed with insulating ceramics and fasteners. One end is extended and connected to a high-voltage power supply. The negative corona is selected and the power supply voltage is 80kV. It is installed horizontally on two sets of support wheels, and a dynamic seal is set between the two ends of the cylinder dust collector and the two tees. When the cylinder dust collector rotates and the tee does not move, there is no air leakage. In an aqueous solution containing 1wt% cetyltrimethylammonium bromide, the distance between the liquid surface and the lower edge of the inner wall of the cylindrical dust collecting pole is 25 cm, and the rotating speed of the cylindrical dust collecting pole is 0.5 revolutions per second. Under the linear velocity of catering exhaust gas, the interception efficiency of the device for droplets with a particle size of 2 μm exceeds 92%.

Example 4:

Take a polyvinyl chloride cylinder with a length of 100cm and a diameter of 30cm. The inner wall is firmly pasted with a layer of aluminum foil. Gears and two sets of tires are installed on the outside. On both sides, a polyvinyl chloride plastic tee with a diameter of 30cm is placed. Two straight-through nozzles are placed vertically, holes are drilled on the outside of the straight pipe sections of the two tees, and corona wires are inserted, and the corona wires coincide with the central axis of the cylindrical dust collector. It is fixed on the outer side of the tee, fixed with insulating ceramics and fasteners, one end protrudes and connected to a high-voltage power supply, choose positive corona, the power supply voltage is 40kV, and the outside of the cylinder dust collector is equipped with gears and two sets of tire belts. The cylinder dust collector is placed horizontally on two sets of supporting wheels, and a dynamic seal is set between the two ends of the cylinder dust collector and the two tees. When the cylinder dust collector rotates and the tee does not move, there is no air leakage. The electrostatic precipitator is immersed in an aqueous solution containing 10wt% p-chloro-m-xylenol. The distance between the liquid surface and the lower edge of the inner wall of the cylindrical dust collecting pole is 5 cm, and the rotating speed of the cylindrical dust collecting pole is 0.8 rev/s. Under the linear velocity of the catering waste gas, the interception efficiency of the device for the droplets with a particle size of 2 μm exceeds 94%.

Example 5:

Take an iron cylinder with a length of 200cm and a diameter of 50cm, install gears and two sets of tires on the outside, place polyethylene plastic tees with a diameter of 50cm on both sides, and place the two straight nozzles of the two tees vertically. Drill holes on the outside of the straight pipe sections of each tee, and pass through the corona wire. The corona wire coincides with the central axis of the cylindrical dust collecting pole. Insulating ceramics and fasteners are fixed, one end is protruded and connected to a high-voltage power supply, negative corona is selected, the power supply voltage is 30kV, gears and two sets of belts are installed on the outside of the cylindrical dust collector, and the cylindrical dust collector is horizontally placed on the two sets of brackets On the wheel, a dynamic seal is set between the two ends of the cylinder dust collector and the two tees. When the cylinder dust collector rotates and the tee does not move, there is no air leakage. The electrostatic precipitator is immersed in 0.3wt% of In the aqueous solution of potassium acid potassium, the distance between the liquid surface and the lower edge of the inner wall of the cylinder dust collection pole is 5cm, and the rotational speed of the cylinder dust collection pole is 1.5 rpm. The interception efficiency of 2μm droplets is over 95%.

Embodiment 6:

Take an ABS plastic cylinder with a length of 100cm and a diameter of 40cm. The inner wall is firmly pasted with a layer of aluminum foil. Gears and two sets of tires are installed on the outside. Polyethylene plastic tees with a diameter of 40cm are placed on both sides. The straight-through nozzle is placed vertically, the outer side of the straight pipe section of the two tees is punched, and the corona wire is inserted. The corona wire coincides with the central axis of the cylindrical dust collector. The outer test of the tee is fixed with insulating ceramics and fasteners, one end is extended and connected to a high-voltage power supply, negative corona is selected, the power supply voltage is 40kV, gears and two sets of tires are installed outside the cylinder dust collection pole, and the cylinder dust collection The pole is horizontally placed on two sets of supporting wheels, and a dynamic seal is set between the two ends of the cylinder dust collector and the two tees. When the cylinder dust collector rotates and the tee does not move, there is no air leakage. Immerse in an aqueous solution of 0.8wt% 1-dodecyl-3-methylimidazole bromide, the distance between the liquid surface and the lower edge of the inner wall of the cylindrical dust collecting pole is 8cm, and the rotating speed of the cylindrical dust collecting pole is 1 rpm Seconds, at the linear velocity of catering waste gas of 8m/s, the interception efficiency of the device for droplets with a particle size of 2μm exceeds 95%.

Embodiment 7:

Take a polycarbonate cylinder with a length of 200cm and a diameter of 50cm. The inner wall is firmly pasted with a layer of aluminum foil. Gears and two sets of tires are installed on the outside. Polypropylene plastic tees with a diameter of 50cm are placed on both sides. Two straight-through nozzles are placed vertically, holes are drilled on the outside of the straight pipe sections of the two tees, and the corona wires are inserted. The corona wires coincide with the central axis of the cylindrical dust collector. Choose a burr wire with a nominal diameter of 1mm and fix both ends On the outside of the tee, fix it with insulating ceramics and fasteners, one end is extended and connected to a high-voltage power supply, choose negative corona, the power supply voltage is 20kV, and the outside of the cylinder dust collector is equipped with gears and two sets of tire belts, and the cylinder is collected The dust pole is placed horizontally on two sets of supporting wheels, and a dynamic seal is set between the two ends of the cylinder dust collection pole and the two tees. When the cylinder dust collection pole rotates and the tee joint does not move, there is no air leakage. The device is immersed in an aqueous solution of 0.1wt% sodium pyrithione, the distance between the liquid surface and the lower edge of the inner wall of the cylindrical dust collecting pole is 5cm, the rotating speed of the cylindrical dust collecting pole is 1.5 revolutions/second, and the catering exhaust gas of 8m/s At the line speed, the interception efficiency of the device for droplets with a particle size of 2 μm exceeds 95%.

Claims (4)

1. a drum type brake half wet process electrostatic precipitator, realizes by the following technical solutions: at a cylindrical conductive drum Dust collector pole is outside installs gear and two set wheel belt, overlaps wheel belt by cylinder dust collector pole horizontal setting on two groups of support rollers by two, Often group support roller is made up of two support rollers, and the transmission of the power gear by being engaged mutually with cylinder dust collector pole outer gear can realize The rotation of this cylinder dust collector pole, the rotating speed of cylinder dust collector pole is 0.01～5 revolutions per second, and cylinder dust collector pole draw ratio is at 1:1～10:1 Between, two right-angle tees are disposed at the two ends of cylinder dust collector pole, the right angle mouth of pipe of the two right-angle tee is received with cylinder respectively The two ends of dirt pole are connected, and have movable sealing face, it is ensured that cylinder between the right angle mouth of pipe and the mouth of pipe of cylinder dust collector pole of right-angle tee Dust collector pole rotate and right-angle tee non-rotary in the case of air tight between cylinder dust collector pole and the right-angle tee right angle mouth of pipe, two Arranging corona discharge electrode between individual right-angle tee, the central axis of corona discharge electrode and cylinder dust collector pole coincides, and the two ends of corona discharge electrode are respectively It is fixed on the outer wall of the straight length of two right-angle tees by insulating ceramics and securing member and ensures corona discharge electrode and right-angle tee pipe Between insulate, one end of corona discharge electrode stretches out beyond right-angle tee and connects external high pressure power supply, and supply voltage is at 1kV～80kV Between, positive corona and negative corona, above whole device is positioned in absorption liquid bath, the liquid level submergence cylinder of absorbing liquid The mouth of pipe vertically downward of the right-angle tee at dust collector pole two ends submergence partial cylinder dust collector pole, absorbing liquid liquid level is received higher than cylinder The distance of the extremely internal lower edge of dirt is the 1/10～3/4 of cylinder dust collector pole inside radius, and food and drink waste gas is from the right angle of cylinder dust collector pole one end The threeway mouth of pipe vertically upward enters, waste gas after purifying from the right-angle tee of cylinder dust collector pole other end pipe vertically upward Mouth is discharged, and along with the continuous rotation of cylinder, cylinder inner wall is in the state of moistening all the time, and the diameter of cylinder is at 8cm～100cm Between.

2. a kind of drum type brake half wet process electrostatic precipitator as claimed in claim 1, is further characterized in that: absorbing liquid is that antimicrobial surface is lived Property agent aqueous solution, mass concentration 0.1%～10%, solute is Dodecyl trimethyl ammonium chloride, trimethyl chlorination Ammonium, Tetradecyl Trimethyl Ammonium Bromide, tetradecyl trimethyl ammonium chloride, cetyl trimethylammonium bromide, cetyl Trimethyl ammonium chloride, Cetyltrimethylammonium bromide, octadecyl trimethyl ammonium chloride, triclosan, chlorhexidine acetate, Benzalkonium bromide, benzalkonium chloride, potassium sorbate, sodium pyrithione, Zinc Pyrithione, copper pyrithione, bromination 1-ethyl-3- Methylimidazole., iodate 1-ethyl-3-methylimidazole, bromination 1-propyl group-3-Methylimidazole., iodate 1-propyl group-3-Methylimidazole., Chlorination 1-butyl-3-Methylimidazole., 1-butyl-3-methylimidazolium bromide, iodate 1-butyl-3-Methylimidazole., chlorination 1-hexyl -3-Methylimidazole., bromination 1-hexyl-3-Methylimidazole., iodate 1-hexyl-3-Methylimidazole., chlorination 1-octyl group-3-Methylimidazole., Bromination 1-octyl group-3-Methylimidazole., iodate 1-hexyl-3-Methylimidazole., chlorination 1-decyl-3-Methylimidazole., bromination 1-decyl -3-Methylimidazole., iodate 1-decyl-3-Methylimidazole., chlorination 1-benzyl-3-Methylimidazole., bromination 1-benzyl-3-Methylimidazole., Iodate 1-benzyl-3-Methylimidazole., chlorination 1-dodecyl-3-Methylimidazole., bromination 1-dodecyl-3-Methylimidazole., iodine Change 1-dodecyl-3-Methylimidazole., chlorination 1-myristyl-3-Methylimidazole., bromination 1-myristyl-3-Methylimidazole., Iodate 1-myristyl-3-Methylimidazole., chlorination 1-cetyl-3-Methylimidazole., bromination 1-cetyl-3-Methylimidazole., Iodate 1-cetyl-3-Methylimidazole., chlorxylone, DBDMH, bromine chlorine hydantoin, two chlordantoins, 5,5-diformazan Any one or the mixture of the most several arbitrary proportion in the middle of base glycolylurea.

3. a kind of drum type brake half wet process electrostatic precipitator as claimed in claim 1, is further characterized in that: the cylinder of this electrostatic precipitator The material of dust collector pole is that inwall firmly pastes the vinyon of one layer of aluminium foil, polypropylene plastics, nylon plastic(s), ABS mould Material, polycarbonate plastic, poly methyl methacrylate plastic, polypropylene plastics, igelite, acetal plastic or Polydiphenyl ether plastics.

4. a kind of drum type brake half wet process electrostatic precipitator as claimed in claim 1, is further characterized in that: the corona of this electrostatic precipitator Pole is round wire, astroid, jagged line, prickle shape line or fishbone line.