JP4559563B2 - Exhaust gas purification device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an exhaust gas purifying apparatus in a vehicle or marine engine, a stationary engine for power generation, a boiler, an incinerator, and the like.
[0002]
[Background Art and Problems to be Solved by the Invention]
Conventionally, for example, incineration ash obtained by incineration of general waste and industrial waste at 900 ° C. or less contains environmentally and animally harmful substances and metals. These harmful substances such as PCB, dioxin, The means to make pollution-free such as lead and cadmium cannot be solved by an incinerator using ordinary fuel. If this incineration ash is discarded as it is to landfill, it is natural that water pollution and soil pollution will occur. Moreover, acid rain that has recently reached pH 3 causes the above metals to elute and seriously affect drinking water. I will give it. Conventionally, in order to solve this problem, various methods have been proposed for melting incineration ash to make harmful substances harmless, but technology for treating harmful exhaust gas generated therefrom at low cost has not been developed yet. It has not been.
[0003]
The present invention solves the above-described conventional problems, and an object of the present invention is to provide an exhaust gas purifying apparatus capable of greatly reducing the equipment cost and the processing cost.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, an exhaust gas purifying apparatus according to the present invention has an exhaust duct standing at the exhaust gas outlet of an incinerator or melting furnace, and an electrical insulator case made of a high-temperature heat-resistant material in the exhaust duct. A plurality of exhaust inlets formed at the bottom of the electrical insulator case; an exhaust outlet formed at the top of the electrical insulator case; and an interval in a vertically placed state inside the electrical insulator case. placing a plurality of electrode plates which is fixed an electrical dielectric on one side of the arranged metal plates in parallel, by applying a high voltage to each metal plate, to induce plasma discharge in the electrode plates, An exhaust gas purification device for decomposing and dissociating harmful substances in the exhaust gas is disposed, and a carbon filter is installed downstream of the exhaust gas purification device in the exhaust duct.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 3 show an embodiment of an exhaust gas purifying apparatus of the present invention, FIG. 1A is a perspective view showing a partial cross section of the exhaust gas purifying apparatus, and FIG. 1B is a perspective view of FIG. 2 is a perspective view of the electrode plate, FIG. 2 is a diagram showing the electric circuit of FIG. 1, and FIG. 3 is a perspective view of the exhaust gas purification device of FIG.
[0006]
In FIG. 1, an exhaust gas purification apparatus 1 includes an electrical insulator case 2 made of a high-temperature heat-resistant material, a plurality of exhaust inlets 2 a formed at the bottom of the case 2, and an exhaust outlet 2 b formed at the top of the case 2. And a plurality of electrode plates 3 arranged in parallel in the case 2 at intervals in a vertically placed state. 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.
[0007]
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 and connected to the high voltage connection terminals C and D. The plasma discharge is induced between the electrode plates 3 and 3 by applying a high voltage between the metal plates 3b. The slidac 5 selects the intensity of plasma discharge by changing the voltage between the high voltage terminals C and D according to the exhaust gas component passing between the electrode plates 3. When the exhaust gas passes through a plurality of exhaust inlets 2 a provided at the bottom of the electrical insulator case 1 and reaches each electrode plate 3 by plasma discharge due to a high voltage between the high voltage terminals C and D, Toxic substances such as NOx, hydrocarbon, PCB, dioxin are decomposed and dissociated.
[0008]
FIG. 3 is a perspective view showing an example in which the exhaust gas purification device 1 is mounted on an incinerator or a melting furnace 6. An exhaust pipe or an exhaust duct (exhaust passage) 9 is erected at the exhaust gas outlet 7 of the melting furnace 6, the exhaust gas purification device 1 is installed in the exhaust duct 9, and a carbon filter 10 is disposed downstream thereof. is doing. The carbon filter 10 is for absorbing gas and odor in the exhaust duct 9.
[0009]
【The invention's effect】
As is apparent from the above description, according to the present invention, harmful gas in exhaust gas can be decomposed and dissociated by plasma, and equipment costs and processing costs 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 the electric circuit of FIG.
FIG. 3 is a perspective view of the exhaust gas purifying device of FIG. 1 attached to a target device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Exhaust gas purification apparatus 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 (1)

An exhaust duct is erected at the exhaust gas outlet of the incinerator or melting furnace, and an electrical insulator case made of a high-temperature heat-resistant material and a plurality of exhausts formed at the bottom of the electrical insulator case in the exhaust duct An electric dielectric on one side of an inlet, an exhaust outlet formed in the upper part of the electrical insulator case, and a metal plate arranged in parallel in the electrical insulator case with a space in a vertically placed state and a plurality of electrode plates which is fixed to, placement by applying a high voltage to each metal plate, to induce plasma discharge in the electrode plates, decompose harmful substances in the exhaust gas, the exhaust gas purifying apparatus of dissociating An exhaust gas purifying device, wherein a carbon filter is installed on the exhaust duct downstream of the exhaust gas purifying device.

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