JP2001087622A - Exhaust gas cleaning apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce equipment cost and treatment cost to a large extent. SOLUTION: A plurality of electrode plates 3 each obtained by fixing an electrical dielectric 3a to the single surface of a metal plate 3b are provided in an exhaust gas passage 2 so as to leave an interval and plasma discharge is induced between the electrode plates by applying high voltage across the metal plates to decompose and dissociate a harmful substance in exhaust gas.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas purification apparatus for a vehicle or marine engine, a stationary engine for power generation, a boiler, an incinerator and the like.

[0002]

2. Description of the Related Art Conventionally, for example, incinerated ash obtained by incinerating general waste or industrial waste at 900 ° C. or less contains substances and metals which are harmful to the environment and humans. And these harmful substances, such as P
Means for detoxifying CB, dioxin, lead, cadmium and the like cannot be solved by incinerators using ordinary fuels. If this incinerated ash is directly disposed of in landfills, it is natural that water and soil pollution will occur. In addition, recently, the above-mentioned metals are eluted due to acid rain reaching pH 3 and seriously affect drinking water. Give it. Conventionally, to solve this problem, various methods have been proposed to detoxify harmful substances by melting incineration ash.However, technology to treat harmful exhaust gas generated from these at low cost is still being developed. It has not been.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide an exhaust gas purifying apparatus capable of greatly reducing equipment costs and processing costs.

[0004]

Means for Solving the Problems To achieve the above object, an exhaust gas purifying apparatus of the present invention comprises:
A plurality of electrode plates each having an electric dielectric fixed to one surface of a metal plate are attached at intervals, and a high voltage is applied to each metal plate to induce a plasma discharge between the electrode plates, thereby causing harm in exhaust gas. It is characterized by decomposing and dissociating substances.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show one embodiment of an exhaust gas purifying apparatus of the present invention, FIG. 1 (A) is a perspective view showing a partial cross section of the exhaust gas purifying apparatus, and FIG. 1 (B) is FIG.
FIG. 2A is a perspective view of an electrode plate, FIG. 2 is a view showing an electric circuit of FIG. 1, and FIG. 3 is a perspective view of the exhaust gas purifying apparatus of FIG.

Referring to FIG. 1, an exhaust gas purifying apparatus 1 includes an electrical insulator case 2 made of a high-temperature heat-resistant material, a plurality of exhaust ports 2 a formed at the bottom of the case 2, and an upper portion of the case 2. An exhaust outlet 2b, and a plurality of electrode plates 3 arranged in parallel in the case 2 at intervals in a vertical state.
It is composed of The electrode plate 3 is obtained by fixing a metal plate 3b to an electric dielectric 3a made of glass or quartz having a dielectric constant close to 1.

In FIG. 2, a low voltage is applied to the primary side connection terminals U and V of the transformer 4 to generate a high voltage between the secondary side high voltage terminals C and D. By applying a high voltage between the metal plates 3b connected to D, a plasma discharge is induced between the electrode plates 3,3.
Slidac 5 changes the voltage between the high voltage terminals C and D according to the components of the exhaust gas passing between the electrode plates 3 to select the intensity of the plasma discharge. Due to the plasma discharge caused by the high voltage between the high voltage terminals C and D, when the exhaust gas passes through the plurality of exhaust inlets 2a provided at the bottom of the electrical insulator case 1 and reaches each electrode plate 3, the exhaust gas contains NO
Harmful substances such as x, hydrocarbons, PCBs and dioxins are decomposed and dissociated.

FIG. 3 is a perspective view showing an example in which the exhaust gas purifying apparatus 1 is mounted on an incinerator or melting furnace 6. Melting furnace 6
Exhaust pipes and exhaust ducts (exhaust passages) 9
The exhaust gas purification device 1 is installed in the exhaust duct 9, and the carbon filter 10 is installed downstream of the exhaust gas purification device 1. The carbon filter 10 is for absorbing gas and odor in the exhaust duct 9.

[0009]

As is apparent from the above description, according to the present invention, the harmful gas in the exhaust gas can be decomposed and dissociated by the plasma, and the equipment cost and the processing cost can be greatly reduced. .

[Brief description of the drawings]

1 shows an embodiment of an exhaust gas purifying apparatus of the present invention, FIG. 1 (A) is a perspective view showing a partial cross section of the exhaust gas purifying apparatus, and FIG. 1 (B) is an electrode of FIG. 1 (A). It is a perspective view of a board.

FIG. 2 is a diagram showing an electric circuit of FIG. 1;

FIG. 3 is a perspective view of the exhaust gas purifying apparatus of FIG. 1 attached to a target apparatus;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Exhaust gas purifier 2 ... Electrical insulator case 2a ... Exhaust inlet 2b ... Exhaust outlet 3 ... Electrode plate 3a ... Electrical dielectric 3b ... Metal plate 9 ... Exhaust passage 10 ... Carbon filter

Claims (2)

[Claims] 1. A plurality of electrode plates each having an electric dielectric fixed to one surface of a metal plate are mounted at intervals in an exhaust gas passage, and a high voltage is applied to each metal plate to thereby form a gap between the electrode plates. An exhaust gas purifier characterized by inducing plasma discharge to decompose and dissociate harmful substances in exhaust gas. 2. The exhaust gas purifying apparatus according to claim 1, wherein a carbon filter is provided downstream of said exhaust gas passage.