WO2009059451A1

WO2009059451A1 - An electrostatic precipitator

Info

Publication number: WO2009059451A1
Application number: PCT/CN2007/003134
Authority: WO
Inventors: Raymond Wallin Jan- Olof
Original assignee: Su, Jiting
Priority date: 2007-11-05
Filing date: 2007-11-05
Publication date: 2009-05-14

Abstract

An electrostatic precipitator includes a housing, a high tension circuit, electrically conductive plates (21,22,23,24,25,31,32,33,34), and a high tension ionization electrode (1). The electrically conductive plates are arranged parallel within the housing, and each group of plates which are arranged alternately and side-by-side in spaced-apart relationship are connected electrically. The high tension circuit is connected electrically with the high tension ionization electrode (1), and the electrically conductive plates are divided into a first group of GND plates and a second group of charging plates. The first group of GND plates and the second group of charging plates are arranged alternately. Two GND plates arranged at outer sides have extended portions (211,251), and the high tension ionization electrode (5) is arranged centrally and parallel with the plates within the space defined by the extended portions (4), thereby creating an ionization space corresponding to said space when operates, wherein the front edges of the charging plates are projected into the ionization space. Based on the principle of charge adsorption, the charging plates can be charged, therefore it is unnecessary that applying 40kV to the charging plates additionally, thus arrives at the simplification of configuration and the reduction of cost due to one high tension circuit can be removed. In addition, the electrostatic precipitator is much safer because the electrically conductive plates need not be applied with high tension.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air cleaning device, and more particularly to an electrostatic dust collecting device that utilizes electrostatic adsorption of dust particles in air. Background Art A device for sinking dust particles in air using a DC high voltage power source is an electrostatic precipitator, and an essential portion thereof is two high voltage electrodes. The electrode may be in the form of a plate or the like. In a typical electrostatic precipitator, a wire is used as an electrode, and a metal tube (or plate) is a positive electrode. The discharge of the wire is called a discharge electrode, and an ionization ring is generated around the discharge electrode. Since it emits brilliance in the dark, it is called a corona pole. Most industrial gases are sufficiently conductive and easily ionized, so ionization occurs through the ionization zone. The positive and negative ions generated by ionization impinge on the dust particles during the movement of the two poles, so that the charge on the dust particles is attracted by the poles. Separate from the gas. However, since the range of ionization enthalpy is small, the positive ions move toward the wire (negative electrode), so that there is less chance of positively charging the dust particles, that is, there are few dust particles deposited on the wire. Most of the dust particles are struck by negative ions and carry negative electricity to move toward the metal pipe. Therefore, the pipe wall plays a major settlement, which is called the settlement stage. Electrostatic dust collectors generally have three types: mesh type, tube type and plate type. Because of the high manufacturing cost and inconvenient cleaning, the plate type electrostatic precipitator has gradually become the development direction of the industry. The electrostatic dust collecting structure disclosed in Chinese Patent No. 03263365. 3 is composed of a frame 1', a metal plate 2' and a connecting rod 3'. The frame 1' can be used to accommodate a plurality of metal plates. 21', 22', at the corresponding positions on the respective metal plates are respectively staggered with large perforations 211', 221' and small perforations 212', 222', so that the connecting rods 3' can be arranged to equidistantly arrange the metals The plate 2' has a conductive connection formed by the spaced metal plates 2'; a wire 4' as a discharge electrode is also provided on the frame 1', and the wire 4' is disposed perpendicular to the metal plate 2'. In use, a high voltage of 80KV is applied to the wire 4', the metal plate 21' is grounded, the metal plate 22' is connected to a high voltage of 40 kV, and after the high voltage is applied to the wire 4', the surrounding air is ionized and a charged positive is generated. Negative ions, negative ions impact the dust particles to electrify the dust particles; due to the potential difference between the metal plate 21' and the metal plate 22', an electric field is formed between the two metal plates, and when the charged dust particles pass between the metal plates 2', the electric field Under the action, it settles on the grounded metal plate 21' to achieve the purpose of dust collection.

The above scheme adopts a multi-layer dust collecting plate to enhance the dust collecting effect and facilitate cleaning. But from The following deficiencies:

1. Two different sets of circuits are required to provide different high voltages of 80KV and 40KV. The structure is more complicated and the cost is higher;

2. Add 40KV high voltage to a set of metal plates, and increase the high-voltage joints on the frame to increase safety hazards. SUMMARY OF THE INVENTION The present invention provides a low cost, safe to use electrostatic precipitator. In order to achieve the above object, an electrostatic dust collecting device of the present invention comprises a frame body, a high voltage circuit package, a conductive sheet and a high voltage electrode wire, and a plurality of conductive plates are arranged in parallel in the frame body, wherein the conductive sheets are set at a fixed distance and spaced apart The set of conductive plates form an electrical connection; the high voltage package circuit is electrically connected with the high voltage electrode wire, wherein the conductive piece is divided into a grounding piece group and a charging piece group which are arranged at an interval, and are disposed on the outermost two grounding pieces. An extension portion, a high-voltage electrode wire is disposed at a center of the enclosing portion surrounding the space and parallel to the conductive sheet, so that when the high-voltage electrode wire is applied with a high voltage, an ionization space is formed which is in space with the elongated portion; The charging sheet group in the conductive sheet extends into the ionization space.

The lateral vertical distance between the end of the charging piece and the high voltage electrode wire is smaller than the vertical distance of the high voltage electrode wire to the outermost two grounding piece extensions.

The lateral vertical distance from the end of the inner grounding piece to the high-voltage electrode wire should be greater than or equal to the vertical distance of the high-voltage electrode wire to the outermost two grounding piece extensions.

The high voltage electrode wire is a tungsten wire.

The conductive sheet is a metal sheet or an insulating sheet whose surface is covered with a conductive layer.

The electrostatic dust collecting device is arranged in a plurality of groups.

After adopting the above scheme, since the present invention utilizes the ionization space formed by the high-voltage electrode wire, the charging piece is inserted into the space, and the charging piece is charged by the principle that the electric conductor adsorbs the electric charge, so that it is not necessary to additionally apply a voltage of 40 KV to the charging piece. Therefore, a set of circuits for generating high voltage is omitted, and the structure is simplified, so that the cost is greatly reduced; in addition, all the conductive sheets do not need to be connected with a high voltage, and the product is safer. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic cross-sectional view of a prior art;

Figure 2A is a schematic diagram 1 of the principle of the present invention;

2B is a schematic diagram 2 of the principle of the present invention Figure 3 is a schematic illustration of the use of the invention. DETAILED DESCRIPTION OF THE INVENTION The present invention will be further described below in conjunction with the accompanying drawings.

As shown in FIG. 2A, a plurality of conductive sheets (perpendicular to the paper surface, cross-section in the drawing) are disposed in parallel in the frame (not shown), and the conductive sheets may be metal sheets or may be covered with conductive materials. Other materials of the layer, such as paper printed with conductive ink, plastic sheet coated with conductive paint, and the like. The plurality of conductive sheets are two sets of grounding strips 21, 22, 23, 24, 25 and charging sheets 31, 32, 33, 34 which are alternately arranged, and the grounding strips 21, 22, 23, 24, 25 pass through a set of connecting rods 4 Conductively connected and grounded, all of the charging sheets 31, 32, 33, 34 are electrically connected by another set of connecting rods 5; wherein the outermost grounding strips 21, 25 are provided with elongated portions 211, 251 at the right end, in the grounding strip The space surrounded by the extension portions 211 and 251 of 21 and 25 is provided with a high-voltage electrode wire 1 (perpendicular to the paper surface, in the figure, a cross-section), and the high-voltage electrode wire 1 is made of a tungsten wire and a high-voltage package circuit (not shown in the drawing) The electrical connection is formed, the vertical distance to the grounding strips 21, 25 extensions 211, 251 is equal, denoted by a; the right vertical distance between the right end of the charging sheets 31, 32, 33, 34 and the high voltage electrode wire 2 is b; The right end portion of the inner grounding lugs 22, 23, 24 is horizontally perpendicular to the high voltage electrode wire 1 by a distance c.

As shown in FIG. 2B, in use, a high voltage package circuit is used to generate a positive/negative high voltage of 80 kV (not limited to 80 kV, hereinafter, a negative high voltage is taken as an example), and is applied to the high voltage electrode wire 1 and the outermost two grounding pieces. 21, 25 extension portions 211, 251 generate a weak discharge current, and a square three-dimensional ionization space having a side length of 2a is formed around the high-voltage electrode wire 1, and the air in the space is highly ionized and has a negative charge due to the charging piece. The lateral vertical distance b between the right end portion of 31, 32, 33, 34 and the high voltage electrode wire 1 is less than a, so the right end portions of 31, 32, 33, 34 are extended into the aforementioned ionization space, and the charging sheets 31, 32, 33, 34, the negative charge of the ionization space is attracted to bring the charging sheets 31, 32, 33, 34 with high voltage, so that between the charging sheet 31 and the grounding strips 21, 22, between the charging sheet 32 and the grounding strips 22, 23, An electric field is formed between the charging piece 33 and the grounding pieces 23 and 24, and between the charging piece 34 and the grounding pieces 24 and 25 to form an electric field. In order to prevent the grounding lugs 22, 23, 24 from being charged, the distance c between the grounding lugs 22, 23, 24 and the high voltage electrode wire 1 should be; i is equal to a, ensuring that the grounding lugs 22, 23, 24 are completely grounded, so that the electric field is The potential difference is the largest. Since the charging sheets 31, 32, 33, 34, the grounding strips 21, 22, 23, 24, 25 have previously formed independent conductive connections through a set of connecting rods, the voltages on the charging sheets 31, 32, 33, 34 Evenly, the electric field of the entire device is also hooked.

When the air with dust particles enters the ionization space, the particles are charged by the ions, and the charged dust particles are charged after the airflow enters the area between the charging piece and the grounding piece. The electric field between the electric piece and the grounding piece falls on the aforementioned grounding lugs 21, 22, 23, 24, 25.

As shown in Fig. 3, a plurality of sets of the apparatus of the present invention can be simultaneously used in an electrostatic precipitator to enhance the dust collecting effect.

Claims

Rights request

An electrostatic dust collecting device comprising a frame body, a high voltage package circuit, a conductive sheet and a high voltage electrode wire, wherein a plurality of parallelly arranged conductive plates are arranged in parallel in the frame, the conductive sheets are fixed at equal distances, and are arranged at intervals An electrical connection is formed between a group of conductive plates; the high voltage package circuit is electrically connected with the high voltage electrode wire; and the conductive sheet is divided into a grounding piece group and a charging piece group which are arranged at an interval from each other, and are disposed on the outermost two grounding pieces. An extension portion is provided, wherein the high-voltage electrode wire is disposed at a center of the enclosing portion and parallel to the conductive sheet, so that when the high-voltage electrode wire is applied with high pressure, an ionization space is formed which is in space with the elongated portion. And the charging sheet group in the conductive sheet extends into the ionization space.

2. An electrostatic precipitator according to claim 1, wherein: the lateral perpendicular distance between the end of the charging piece and the high voltage electrode wire is smaller than the vertical distance of the high voltage electrode wire to the outermost two grounding piece extensions.

3. The electrostatic precipitator according to claim 1, wherein: the horizontal vertical distance from the end of the inner grounding piece to the high voltage electrode wire is greater than or equal to the height of the high voltage electrode wire to the outermost two grounding piece extensions. vertical distance.

4. An electrostatic precipitator according to claim 1, wherein: said high voltage electrode wire is a tungsten wire.

5. An electrostatic precipitator according to claim 1, wherein: said conductive sheet is a metal sheet or an insulating sheet having a surface coated with a conductive layer.

6. An electrostatic precipitator according to claim 1, wherein: said electrostatic precipitator is arranged in a plurality of groups.