UA146805U - CONSTRUCTION OF ELECTRODES FOR ELECTROFILTER WITH DOUBLE SURFACE BARRIER DISCHARGE - Google Patents

Abstract

The design of the electrodes for the electrostatic precipitator with a double barrier discharge consists of two pairs of electrodes of the ionizer and one pair of precipitating electrodes. In both pairs of electrodes of the ionizer (2) and (3) are located symmetrically to each other, and a pair of deposition electrodes of the electrostatic separator (5) and (6) are placed parallel to each other. In each pair of electrodes of the ionizer electrodes (2) and (3) are placed on the opposite side of the dielectric barrier (1) so that the high-voltage electrode of the ionizer (2) is located inside the active region of the electrostatic precipitator, while the grounded electrode of the ionizer (3) is located on the opposite side of the dielectric barrier (1). The grounded electrode (3) is located between the high-voltage electrode of the ionizer (2) and the deposition electrodes (5) and (6). The distance (a) between the high voltage electrodes of both pairs of ionizer electrodes is at least twice the distance (b) between the high voltage electrode and the grounded electrode of each pair of ionizer electrodes, according to the ratio: a≥2b. The deposition electrodes of the electrostatic separator (5) and (6) consist of two flat plates and are arranged parallel to each other so that both are simultaneously parallel to the surface of the electrodes of the ionizer (2) and (3). The length of both electrodes of the electrostatic separator (c) is greater than the distance (a) between the high-voltage electrodes of the ionizer, according to the ratio: c> a.

Description

The useful model belongs to the design of electrodes for a two-stage electrostatic precipitator with a double surface barrier discharge, intended for cleaning gas from solid impurities.

Electrofilters are known from patents, in which an electrode system of the wire-plate type was used to create electric charges in the ionizer. In the descriptions 05 2129783, 005 2875845, 05 2672948 and 005 3066463, the elements of the electrostatic precipitator were disclosed, including the electrode system, but in these descriptions the electrode system is designed to generate a classic corona discharge, not a surface barrier discharge.

Also, devices for reducing pollution of liquids and gases are known from patents, which use the phenomenon of dissociation of pollutants in the plasma of a volumetric barrier discharge. Patent 05 6811757 describes the use of a volumetric barrier discharge for cleaning gases and liquids in plasma generated by a system of tubular electrodes. Another patent O5 7767167 describes the use of a plasma generator with a volume barrier discharge for neutralization of volatile organic compounds, in which the electrode system is made in the form of a series of parallel plates. Patent 05 6700093 describes the use of volumetric barrier discharges to remove perfluorocarbons from gas as a result of their dissociation in the plasma of a barrier discharge formed between electrodes in the form of two coaxially arranged tubes of different diameters. Patent 05 6245299 describes the use of volume barrier discharge for gas purification from harmful volatile compounds using a series of plasma generators with volume barrier discharge consisting of two parallel flat electrodes separated by a dielectric barrier layer.

From other patents, surface barrier discharge actuators for creating an electrohydrodynamic flow are also known, the purpose of which, however, is to reduce the force of aerodynamic resistance in aviation applications, and not to clean the gas. Patent 5 7380756 describes a drive made of two flat electrodes placed asymmetrically on opposite sides of the dielectric barrier.

The task of the useful model is to create a new design of electrodes for a two-stage electrostatic precipitator with a double surface barrier discharge, which is intended for cleaning gas from solid impurities. In an electric filter of this type, the filtering process takes place in two steps

From the stages. Initially, in the ionizer, particles of pollutants are charged due to the charges arising in the electric discharge. Then, in the electrostatic separator, the trajectory of charged pollution particles is deflected in a constant electric field and deposited on the surface of the deposition electrodes. The design of the electrodes of the electrofilter includes the ionizer electrodes that create a surface barrier discharge and the deposition electrodes of the electrostatic separator.

The problem of a useful model is solved by the fact that in the design of electrodes for an electrostatic precipitator with a double barrier discharge, which consists of two symmetrically located pairs of ionizer electrodes and a pair of parallel deposition electrodes of electrostatic separators, according to the useful model, in each pair of ionizing electrodes, the electrodes are placed on the opposite sides of the dielectric barrier in such a way that the high-voltage electrode of the ionizer is inside the active area of the electrofilter, in which ionization of pollutants occurs, while the grounded electrode of the ionizer is located on the opposite side of the dielectric barrier. At the same time, the grounded electrode is located between the high-voltage electrode of the ionizer and the deposition electrodes. Moreover, the distance (a) between both high-voltage electrodes of the ionizer is at least twice as large as the distance (b) between the high-voltage electrode and the grounded electrode of each pair of ionizers electrodes, according to (with the ratio: ag2r.

The deposition electrodes of the electrostatic separator consist of two flat plates and are located parallel to each other in such a way that both are placed simultaneously parallel to the surface of the ionizer electrodes. However, the length (c) of both deposition electrodes is greater than the distance between the high-voltage electrodes of the ionizer (a), according to the ratio: с»а. This design of the electrodes creates a surface barrier discharge at the edge of the high-voltage electrodes of the ionizer and, as a result, generates an electrohydrodynamic flow of gas in the direction of the precipitating electrodes of the separator. The use of two symmetrical pairs of ionizer electrodes means that a vortex is not created in the electrohydrodynamic flow, which causes an unwanted reverse movement of gas in the direction opposite to the electrohydrodynamic flow.

The advantage of this design of electrodes in comparison with the solutions that have been used so far is to increase the amount of air flowing through the electrostatic precipitator and to increase the efficiency of filtration due to the reduction of the backflow of gas.

The design of the electrode for the electrofilter with a double surface barrier discharge, which is the subject of a useful model, is shown in the drawing in a side section. The drawing shows the parallel arrangement of pairs of high-voltage electrodes (2) and pairs of grounded electrodes (3) of the ionizer on opposite sides of the dielectric barrier (1).

The electrostatic separator consists of two electrodes: a high-voltage electrode (5) and a grounded electrode (6) in the form of flat plates arranged parallel to each other.

This design of the electrodes creates a surface barrier discharge and, as a result, an electrohydrodynamic flow of gas in the direction (4). The high-voltage electrodes (2) of the ionizer are at a distance (a) from each other, and the distance between the high-voltage electrode (2) and the ground electrode (3) of each pair of ionizer electrodes is (B). The electrodes of the electrostatic separator have a length (s).

List of designations 1 - dielectric barriers of the ionizer 2 - high-voltage electrodes of the ionizer

C - grounded electrodes of the ionizer 4 - direction of electrohydrodynamic gas flow 5 - high-voltage deposition electrode of the electrostatic separator b - grounded deposition electrode for the electrostatic separator a - distance between the high-voltage electrodes of the ionizer

B - the distance between the high-voltage electrode and the grounded electrode of both pairs of ionizer electrodes c - the length of the electrodes of the electrostatic separator.

Claims (6)

USEFUL MODEL FORMULA 1. The design of electrodes for an electrofilter with a double barrier discharge, consisting of two pairs of ionizer electrodes and one pair of precipitating electrodes, which is distinguished by the fact that in both pairs, the ionizer electrodes (2) and (3) are located symmetrically to each other, and the pair deposition electrodes of the electrostatic separator (5) and (6) are placed parallel to each other. 2. The design according to claim 1, which differs in that in each pair of electrodes of the ionizer, the electrodes (2) and (3) are located on the opposite side of the dielectric barrier (1) in such a way that the high-voltage electrode of the ionizer (2) is located inside the active area electrofilter, while the grounded electrode of the ionizer (3) is located on the opposite side of the dielectric barrier (1). 3. The design according to claim 1 or 2, which differs in that the grounded electrode (3) is located between the high-voltage electrode of the ionizer (2) and the deposition electrodes (5) and (6). 4. The construction according to any of claims 1-3, which is characterized by the fact that the distance (a) between the high-voltage electrodes of both pairs of ionizer electrodes is at least twice as large as the distance (B) between the high-voltage electrode and the grounded electrode of each pair of ionizer electrodes, according to with the ratio: ag2b. 5. The construction according to any of claims 1-4, which is characterized by the fact that the deposition electrodes of the electrostatic separator (5) and (b) consist of two flat plates and are located parallel to each other in such a way that both are simultaneously located parallel to the surface of the ionizer electrodes (2) and (3). 6. The design according to any of claims 1-5, which differs in that the length of both electrodes of the electrostatic separator (c) is greater than the distance (a) between the high-voltage electrodes of the ionizer, according to the ratio: с»а.