CN1173400A - Electrostatic precipitator - Google Patents

Abstract

An electrostatic dust collector is composed of an ionization unit consisting of several discharge wires for applying high-voltage DC power to them and parallel grounded metal plates, a dust collecting unit consisting of a drive unit and a cleaning unit at a predefined position in the moving path of said positive ring-shaped plate, and a casing. The oil particles are removed by making the oil particles charged and adsorbed on the dust collecting electrode in the process of ionizing the oil particle-containing air flow by the uneven electric field generated by high voltage, and the oil particles adsorbed by the moving electric piece are scraped by a scraper. The dust collector has simple structure and good dust collecting effect.

Description

Electrostatic precipitator

The invention relates to a device for separating dispersed charged particles from the air by electrostatic effect, especially an electrostatic dust collector.

The commonly used electrostatic precipitator uses vibration or water washing to remove the dust particles attached to the electric plate, but if the oil dirt particles adhere to the electric plate, the oil particles cannot be dropped by vibration, such as cleaning liquid, Then the board must be completely dry for a long time before it can be used again.

Please refer to a kind of electrostatic precipitator shown in Figure 1, which can be used to deal with oil fume. The dust collector uses a scraper to scrape off the oil dirt attached to the circular electric plate. However, the electric plate of the electrostatic precipitator needs to be circular, so that the scraper cannot be applied to the general rectangular electric plate. In particular, the scraper is always located in the dust collection area, which affects the dust collection effect.

Figure 2 shows another electrostatic precipitator, which uses a reciprocating and linearly moving scraper to scrape off the oil particles attached to the rectangular electric plate, but this structure needs to use a lot of moving scrapers and tracks, and the structure is rather complicated. for complex.

The main purpose of the present invention is to provide an electrostatic precipitator which has a simple structure and can quickly process a large amount of gas containing oil particles.

The secondary purpose of the present invention is to provide an electrostatic precipitator, which can scrape off the oil particles attached to the electric plate without stopping the machine during the dust collection time, and the scraper of the dust collector can be located at the corner of the dust collection area , does not affect the dust collection effect.

To achieve the above object, the present invention adopts the following technical solutions:

An electrostatic precipitator, which includes: an ionization part that supplies electric charges to particles in the gas, which is composed of several discharge metal wires that apply high-voltage direct current and parallel metal sheets that are grounded; a dust collector that captures the particles in the gas part; a casing for containing the ionization part and the dust collection part; the dust collection part is provided with at least one ring-shaped positive charge sheet bent by a predetermined path and a plurality of negative charge sheets distributed between adjacent positive charge sheets, the The ring-shaped positive sheet is driven by a driving device to be in a state of circular movement, and at a predetermined position in the moving path of the ring-shaped positive sheet, there is a cleaning device for removing particles attached to the two sides of the positive sheet.

Embodiments of the present invention are described in detail as follows in conjunction with accompanying drawings:

Fig. 1 is the conventional schematic diagram of the first electrostatic precipitator for scraping off grease;

Fig. 2 is the schematic diagram of the second commonly used electrostatic precipitator for scraping off grease;

Fig. 3 is a three-dimensional schematic diagram of the first embodiment of the present invention;

Fig. 4 is the IV-IV line sectional view shown in Fig. 3;

Fig. 5 is a V-V line sectional view shown in Fig. 3;

Fig. 6 is the structural representation of clearing device of the present invention;

Fig. 7 is the structural schematic diagram of the first kind of ring-shaped positive electric plate and driving wheel of the present invention;

Fig. 8 is the structural schematic diagram of the second annular belt-shaped positive electric plate and driving wheel of the present invention;

Fig. 9 is a schematic perspective view of the second embodiment of the present invention.

Referring to Fig. 3 and Fig. 5, the electrostatic precipitator of the present embodiment includes an ionization part 1, a dust collection part 2, a collection part 3, a driving mechanism 4, a cleaning mechanism 5 and housing 6 etc. for accommodating the above-mentioned components part.

The above-mentioned ionization part 1 supplies charges to particles in the gas, and is composed of several discharge metal wires 11 for applying high-voltage direct current and parallel metal sheets 12 for grounding.

The above-mentioned dust collection part 2 is arranged behind the ionization part 1, mainly after the airflow passing through the ionization part 1 enters the dust collection part 2, and then traps the particles in the airflow. In this embodiment, the dust collecting part 2 can also be composed of more than one annular positive charge sheet 21 with predetermined path bending and negative charge sheets 22 distributed between adjacent positive charge sheets 21. The positive electric sheet is driven by a driving device to become a state of individual circular movement, and a clearing device is provided at a predetermined position of each ring-shaped positive electric sheet. The ring-shaped positive sheet 21 is a flexible thin metal sheet, connected to the positive electrode to be positively charged, and is provided with a non-conductive insulating portion 23 on its two sides, and the insulating portion 23 is coated with a non-conductive layer. thin film so that its surface is not positively charged.

The above-mentioned driving device 4 has a motor 41 and a plurality of guide wheels 43 pivotally arranged at predetermined positions on the frame 42 , wherein the motor 41 drives a driving wheel 44 .

Above-mentioned ring-shaped positive electric sheet 21 is as shown in Figure 7, walks around several guide wheels 43 and driving pulley 44 sequentially with its insulating portion 23 on two sides, and makes the surface of positive electric sheet 21 have certain tension force, by means of The frictional force between the driving wheel 44 driven by the motor 41 of the driving device 4 and the insulating part 23 of the positive electric sheet 21 makes the entire annular belt-shaped positive electric sheet 21 be in a state of circular rotation by means of the guide wheel 43 .

The above-mentioned negative electrodes 22 located between adjacent positive electrodes 21 are mounted on the frame 42 of the driving device 4 and are not in contact with the guide wheel 43 and the positive electrodes 21 to avoid short circuit. Moreover, the frame 42 is also made of insulating material.

In the present invention, a clearing device 5 is provided at a predetermined position along the moving path of the annular positive sheet 21, and in this embodiment it is located at a corner of the dust collection area. Please refer to Fig. 6, above-mentioned clearing device 5 is provided with an inner scraper 51 and an outer scraper 52 made with insulating material, and this inner and outer scraper 51,52 contacts with the inner and outer two sides of positive electric sheet 21 respectively , and make the inner and outer scrapers 51,52 scrape off the greasy dirt attached to the positive sheet 21 with appropriate friction, and make the greasy dirt on the positive sheet 21 surface accumulate on the inner and outer scrapers 51,52. On the surface of inner and outer scraper 51,52, be provided with the scraper 53 of linear movement, contact with inner and outer scraper 51,52, and set one on inner and outer scraper 51,52 respectively, also can set Multiple nozzles that eject high-velocity gas. In this embodiment, the scraper 53 is driven by a pneumatic cylinder 54 to scrape off the grease on the surfaces of the inner and outer scrapers 51 and 52 .

The collection part 3 is located below the cleaning device 5 to hold the grease scraped off by the scraper 53, and the collection part 3 can be taken out from the side of the housing 6 to remove the grease.

When the oil fume enters the ionization part 1 from the air inlet 61, the oil fume particles are ionized to become negatively charged particles, and then enter the static electricity produced by a plurality of positive sheets 21 and negative sheets 22 that are arranged in parallel and have different electrical properties. In the field, the charged oil particles are collected on the surface of the positive sheet 21 to form oil scale.

Because the positive electric sheet 21 of the present embodiment is driven by the motor 41 and can rotate cyclically, therefore, the annular belt-shaped positive electric sheet 21 can keep sliding on the shaft with the inner and outer scrapers 51, 52 constantly, so that it can be attached to the ring. The grease on the strip-shaped positive sheet 21 is continuously scraped off and attached to the inner and outer scrapers 51, 52. When the set working time for absorbing oil particles arrives, the pneumatic cylinder 54 drives the scraper 53 to scrape off the accumulation. Dry the grease on the inner and outer scrapers 51 and 52 to make it fall into the lower collecting part 3 , and the purified gas after degreasing is discharged from the gas outlet 62 .

If the present invention is used in a place with less oil fume discharge, after working for a period of time, the ring-shaped positive electrode can be moved to scrape off grease; but if it is used in a place with more oil fume discharge, it can be used in When the exhaust fan is started, the positive electric sheet starts to move, so that the positive electric sheet is continuously scraped off the oil particles adsorbed by it, and it is scraped off before the oil particles have accumulated a large amount of grease, so that the positive electric sheet can absorb oil Particle function.

Please refer to Fig. 8, the insulator 71 on both sides of the annular positive electric sheet 7 can also be provided with a plurality of guide holes 72 arranged in a straight line and equidistantly distributed, and the periphery of the driving wheel 8 is provided with convex teeth 81, so that the driving wheel The protruding tooth 81 of 8 fits the guide hole 72 of the insulating part 71, and drives the positive electric sheet 7 to move.

The positive sheet of the present invention can also be coated with a conductive layer of predetermined width and area between the two side edges of insulating material such as fiber cloth.

Please refer to Fig. 9, it is the second embodiment of the present invention, and the dust collecting part of this embodiment is by a plurality of annular belt-shaped positive electric sheets 9 that rotate independently, and the negative electric sheet that is distributed between adjacent positive electric sheets 9 91, and a clearing device 92 is respectively provided at each predetermined position of the positive sheet 9.

Of course, the present invention can also make the ionization part of the electrostatic precipitator, that is, the grounding metal sheet, be made into an annular metal sheet, so that it has the same effect as the dust collecting part.

In addition, the oil dirt on the inner scraper and outer scraper of the cleaning device can also be washed away by the high-speed gas ejected from the nozzle.

Claims (9)

1, a kind of precipitator is characterized in that it comprises: one is supplied in the ionization part of particle in the gas with electric charge, is to be made of the several discharge metal lines that apply high voltage direct current and the parallel metal sheet of ground connection; The dust collecting part of particle in one captured gas; One holds the shell of this ionization part and dust collecting part; Described dust collecting part is provided with the endless belt shape positive electricity sheet of predefined paths bending at least and is distributed in multi-disc negative electricity sheet between adjacent positive electricity sheet, this endless belt shape positive electricity sheet becomes the state that circulation is moved by drive unit drive, and the precalculated position in endless belt shape positive electricity sheet mobile route is provided with and removes the scavenge unit that is attached to the particle on the positive electricity sheet two side faces.

2, precipitator as claimed in claim 1 is characterized in that, described endless belt shape positive electricity sheet is that flexible foil is arranged, and is provided with nonconducting insulation division in its two side.

3, precipitator as claimed in claim 1, it is characterized in that, described dust collecting part also can be made up of more than one endless belt shape positive electricity sheet and the negative electricity sheet that is distributed between the adjacent positive electricity sheet, each endless belt shape positive electricity sheet is to use a drive unit to drive becoming the state that indivedual circulations are moved, and is provided with scavenge unit in each endless belt shape positive electricity sheet precalculated position.

4, precipitator as claimed in claim 1 is characterized in that, described drive unit is provided with a motor and is hubbed at the guide wheel of predetermined quantity on the framework, and this positive electricity sheet is to walk around guide wheel with the insulation division of its two side.

5, precipitator as claimed in claim 1 is characterized in that, described scavenge unit contacts with endless belt shape positive electricity sheet with an inside strake and an outer scraper plate respectively, and contacts with inside and outside scraper plate with the scraper with straight line locomotivity respectively.

6, precipitator as claimed in claim 1, it is characterized in that, described scavenge unit can contact with endless belt shape positive electricity sheet with an inside strake and an outer scraper plate respectively, and establishes one respectively on inside and outside scraper plate, also can establish most the nozzles that can spray high-speed gas.

7, precipitator as claimed in claim 1 is characterized in that, the insulation division of described endless belt shape positive electricity sheet two sides can be established continuously a plurality of guide holes arranged in a straight line and that be equally spaced, and this guide hole is to be embedded in drive unit to be provided with on the driving wheel of double wedge.

8, precipitator as claimed in claim 1 is characterized in that, described endless belt shape positive electricity sheet can be non-conductive fiber cloth, the conductive layer of coating predetermined area between two side edge.

9, precipitator as claimed in claim 1 is characterized in that, the grounded metal sheet of described ionization part also can be made into endless belt shape sheet metal.

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