JP4383599B2 - Exhaust gas purification device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an exhaust gas purifying apparatus suitably employed in an incinerator, an incineration ash melting furnace, 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 incinerated ash is discarded directly to the 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]
Conventionally, most of the harmful gases contained in the exhaust gas of incinerators are absorbed and removed by the graphite material, but in order to increase the contact area between the graphite material and the exhaust gas, the exhaust gas from a large graphite storage tank is removed. The graphite material is dropped into the flue to absorb harmful gases in the exhaust, especially dioxin, but the graphite material is highly hygroscopic and an appropriate amount of graphite material often does not fall from the narrow drop part of the graphite storage tank, Currently, the graphite material is dropped using various devices, which is not a sufficient means to eliminate harmful gases, and the equipment cost of the graphite storage tank and its auxiliary equipment is high. Has the problem.
[0004]
In addition, in order to eliminate harmful gases by using a filter, a large bag filter or a filter device of about 10 m is essential in the flue, and there is a problem that equipment cost and installation area are large. Furthermore, if the graphite material is dropped into a high-temperature exhaust pipe or flue, there is a risk of ignition or explosion if it is filled with graphite ash.
[0005]
The present invention solves the above-described conventional problems, and an object of the present invention is to provide an exhaust gas purification device that can effectively remove harmful gases in the exhaust gas with a small device.
[0006]
[Means for Solving the Problems]
To achieve the above object, an exhaust gas purifying apparatus of the present invention is provided inside the ultrasonic treatment apparatus, the exhaust inlet tube having a plurality of exhaust holes, and activated carbon in the interior of the sonicator A mixed liquid material supply pipe for supplying a mixed liquid material obtained by adding a catalyst of any one of metal particles , metal oxide powder or metal oxide particles to a mixed liquid material of graphite ; and the exhaust feeding under the liquid surface of the mixed liquid material A plurality of ultrasonic vibrators are provided directly below the pipe and constantly spray the mixed liquid material upward in a mist, and an exhaust delivery pipe that discharges the treated exhaust gas to the outside air.
[0007]
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 according to the present invention, FIG. 1 is an overall configuration diagram of the exhaust gas purifying apparatus, FIG. 2 is a cross-sectional view of the ultrasonic processing apparatus of FIG. FIG. 3 is a perspective view of the exhaust delivery pipe of FIG. 2.
[0008]
Exhaust gas from the incinerator or the like is sent into the ultrasonic processing apparatus 1 through the exhaust feed pipe 4 and the exhaust feed valve V1 by the exhaust feed machine F1. Storage tank 9 is a tank for supplying an active carbon inside the sonication apparatus 1, graphite and catalyst mixture material 2 (FIG. 2), and activated carbon in the interior of the ultrasonic treatment apparatus 1 If the mixed liquid material 2 obtained by adding any catalyst of metal particles, metal oxide powder, or metal oxide particles to the mixed liquid agent of graphite is insufficient, the automatic control unit 13 is detected by a signal from the level sensor 10A provided in the ultrasonic processing apparatus 1. Is operated, the control valve V2 provided in the mixed liquid material supply pipe 7 is opened, the mixed liquid material 2 is supplied to the inside of the ultrasonic processing apparatus 1, and when the supply amount reaches the set reference value, the level sensor 10 The automatic control unit 13 is activated by the signal, the control valve V2 is closed, and the supply of the mixed liquid material 2 is stopped.
[0009]
The exhaust gas after the harmful gas in the exhaust gas is removed by the ultrasonic processing apparatus 1 is exhausted by the exhaust fan F2 through the exhaust delivery pipe 5, the exhaust valve V3, the exhaust control valve V4, the gas sensor unit 14, and the exhaust pipe 15, It is discharged from the chimney 16 to the outside air. When the concentration level of various harmful gases contained in the exhaust from the ultrasonic processing apparatus 1 is equal to or higher than a specified value, the automatic control unit 12 is activated by the sensor signal of the gas sensor unit 14 and the exhaust control V4 is closed. At the same time as preventing the exhaust from being released to the outside air, the feedback valve V5 is opened, and the exhaust fan F2 is rotated faster than usual so that the exhaust containing harmful gas is fed back to the ultrasonic processing apparatus 1 via the feedback pipe 8. After an arbitrary time, the automatic control unit 12 is activated, the exhaust fan F2 returns to normal rotation, the feedback valve V5 is closed, the exhaust control V4 is opened, and the gas sensor unit 14 automatically removes harmful gases in the exhaust. The analysis is performed by the control unit 12, and when the value is within the reference value, the normal operation state is restored.
[0010]
FIG. 2 shows the internal structure of the ultrasonic processing apparatus 1. As shown in FIG. 3, an exhaust feed pipe 4 provided with an arbitrary number of exhaust holes 4A is made of a mixed liquid of activated carbon and graphite with metal particles and metal oxide powder. body or disposed on the liquid surface of a liquid mixture material 2 plus one of the catalytic metal oxide particles, by arranging the ultrasonic transducer 3 any number directly below the exhaust inlet tube 4, and an active carbon A mixed liquid material 2 obtained by adding a catalyst of any of metal particles, metal oxide powder or metal oxide particles to a mixed liquid agent of graphite is always blown upward in the form of a mist, and carbon monoxide and carbon dioxide discharged from the exhaust hole 4A Mixed liquid material 2 in which exhaust gas containing carbon, dioxin, nitric oxide, nitrogen dioxide, sulfur dioxide, etc. is added to a mixed liquid agent of activated carbon and graphite with a catalyst of either metal particles , metal oxide powders or metal oxide particles To absorb and suppress.
[0011]
Further, the filter / catalyst section 6 connected to the exhaust delivery pipe 5 is in a mixed liquid material 2 in which any catalyst of metal particles, metal oxide powder or metal oxide particles is added to a mixed liquid agent of activated carbon and graphite. In the ultrasonic treatment apparatus 1 and cannot be completely absorbed or suppressed by the mixed liquid material 2 of the catalyst made of activated carbon, graphite, metal particles, metal oxide powder or metal oxide particles. The harmful gas components are reduced by the catalyst, reduced within the reference value, and discharged from the exhaust delivery pipe 5 to the outside air.
[0012]
The mixed liquid material discharge pipe 2A connected to the ultrasonic processing apparatus 1 opens the discharge valve V6 as necessary, and a catalyst of any one of metal particles , metal oxide powders or metal oxide particles is formed into a mixed liquid agent of activated carbon and graphite. It is provided to discharge and reuse the mixed liquid material 2 to which is added .
[0013]
The ultrasonic oscillator 11 sends electrical energy that mechanically vibrates an arbitrary number of ultrasonic transducers 3 provided in the ultrasonic processing apparatus 1 to the ultrasonic transducer 3 via the connecting wire 3A. Ultrasonic frequency is 1MHz to not 28 KHz, metal particles mixed solutions of the active carbon and graphite, metal oxide powder or any catalyst added was mixture material 2 best atomized particle state metal oxide particles, Set the frequency so that it blows up.
[0014]
【The invention's effect】
As is clear from the above description, according to the present invention, by ultrasonic treatment with a mixed liquid material in which a catalyst of either metal particles , metal oxide powder or metal oxide particles is added to a mixed liquid agent of activated carbon and graphite. In a small device, a large amount of harmful gas is treated, especially when the harmful gas in the exhaust exhausted to the outside exceeds the reference value, the exhaust gas mixed with harmful gas is detected by the signal of the harmful gas sensor. Therefore, the exhaust gas mixed with harmful gas can be prevented from being discharged to the outside by reprocessing and reducing it below the reference value.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram showing an embodiment of an exhaust gas purification apparatus of the present invention.
FIG. 2 is a cross-sectional view of the ultrasonic treatment apparatus of FIG.
3 is a perspective view of the exhaust inlet pipe of FIG. 2. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Ultrasonic processing apparatus 2 ... Mixed liquid material which added catalyst of either metal particle , metal oxide powder, or metal oxide particle to mixed liquid agent of activated carbon and graphite, 3 ... Ultrasonic vibrator 4 ... Exhaust inflow Pipe 4A ... Exhaust hole 5 ... Exhaust delivery pipe 7 ... Mixed liquid material supply pipe 10, 10A ... Level sensor 14 ... Gas sensor section

Claims (3)

An exhaust pipe having a plurality of exhaust holes disposed inside the ultrasonic processing apparatus;
A mixed liquid material supply pipe for supplying a mixed liquid material obtained by adding a catalyst of either metal particles , metal oxide powder or metal oxide particles to a mixed liquid agent of activated carbon and graphite in an ultrasonic treatment apparatus;
A plurality of ultrasonic transducers that are disposed below the exhaust liquid supply pipe below the liquid level of the mixed liquid material and blow up the mixed liquid material upward in a mist-like manner;
An exhaust delivery pipe for discharging the treated exhaust to the outside air;
An exhaust gas purification device comprising: A level sensor is disposed inside the ultrasonic processing apparatus, and the liquid level of the mixed liquid material obtained by adding a catalyst of either metal particles , metal oxide powder or metal oxide particles to a mixed liquid agent of activated carbon and graphite. The exhaust gas purification device according to claim 1, wherein the exhaust gas purification device is maintained at a predetermined value. The exhaust gas purification apparatus according to claim 1, wherein a gas sensor unit is provided in the exhaust gas delivery pipe, and the exhaust gas is fed back to the ultrasonic processing apparatus when the harmful gas contained in the exhaust gas exceeds a predetermined value. .

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