JPS60137413A - Waste gas treating apparatus - Google Patents

Abstract

PURPOSE:To incinerate collected dust while continuing dust collecting operation by heating a filter constituted of a material having high dielectric constant and incinerating the collected dust in a microwave induction heating furnace. CONSTITUTION:Waste gas contg. soot is introduced from an arrow mark 5 and filtered with a filter 2 constituted of a material having high dielectric constant such as TiO2, etc., and the soot 4 is accumulated in the filter 2. The cleaned waste gas is discharged from 6. When the amt. of the accumulated soot increases, a power source of a magnetron oscillator is turned On, and electromagnetic wave is emitted toward the filter 2. Fine particles of the soot 4 accumulated on the surface of the filter 2 or penetrating into the inside of the filter are burnt succeeding to heat generation of the filter 2 by the effect of electromagnetic wave generated by the oscillator 3.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an exhaust gas treatment device, and more particularly to the above device that can collect dust in exhaust gas and incinerate the collected dust while the device continues to operate.

Conventionally, soot (particulate) from diesel engine exhaust gas has been mainly removed using a filter, and a method of burning the particulate after a certain period of time in a two-burner has been researched and developed.

Honeycomb foam has been used in the filter. This honeycomb foam is made of cordierite.
It is the main raw material and was originally used as a carrier (5upport material) for exhaust gas treatment catalysts.
After a certain period of time had elapsed, oil and air were fed into the burner again to cause flame combustion. This method has not yet been put into practical use, but is considered the most promising method today, the so-called best method today.

On the other hand, behind this is the catalyst method, which produces sulfur dioxide gas (5o2).
Due to the fact that there is a virtual stalemate due to the interference of S03 mist (sulfuric acid) caused by the oxidation of sulfuric acid, the basic method of the above-mentioned soot-f over-combustion method is once again attracting attention.

The present invention does not use the above-mentioned combustion method of heating with an oil burner, but uses electromagnetic waves called microwaves and uses the same principle as a microwave oven. Using a heating method,
The present invention provides an exhaust gas treatment device that uses a method of burning soot.

In other words, the present invention comprises a filter that collects dust in exhaust gas from a material with a high dielectric constant, and also provides a microwave dielectric heating device for heating the filter and incinerating the collected dust. The present invention relates to an exhaust gas treatment device characterized by being provided with.

In principle, the present invention devises the structure of the filter so that soot exists between the oscillator Maditron and the heated sieve electric body, just like a microwave oven, and the soot is deposited on the surface of the P agent. It is sufficient to turn on the power when the amount increases.

According to the present invention, unlike a one-burner type, there is no need to stop the engine, and processing can be performed during operation.

An embodiment of the apparatus of the present invention is shown in FIG. 1 and FIG.

In FIGS. 1 and 2, a soot filter 2, a V filter 2, and a magnetron oscillator 3 are set in an external device of an exhaust gas treatment device. This device is set up similarly to the exhaust gas muffler of a diesel engine. The exhaust gas containing soot is filtered by filter 2 as indicated by arrow 5, and 4 tons of soot is collected in filter 2.
-Accumulate. The clean exhaust gas is discharged from arrow 6. When the oscillator 3 is powered on when a large amount of soot 4 has accumulated, the generated electromagnetic waves are scattered toward the filter 2. At this time, it is necessary to select a material with a high dielectric constant for the filter 2 used. In the present invention, this material has a dielectric constant of 83
~18&O (water is cited as a substance with a high dielectric constant, but the dielectric constant of water is higher than 80.7)
o,) is used. In this filter manufacturing method, a 7S Nicam filter is made from titanium oxide itself, or a titanium oxide film is coated on the surface of a heat-resistant glass fiber to finally construct a titanium oxide filter.

The soot particles that have penetrated and accumulated on the filter surface or inside the filter are exposed to electromagnetic waves (e.g. 2.450
MHz), the filter 2 first generates heat and can burn the soot 4.

The reason why the dielectric constant of titanium oxide is 83 to 185.0 is that the dielectric constant varies depending on the thermal history of titanium oxide, the shape of the crystal, or the bonding state of oxygen.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an example of an embodiment of the apparatus of the present invention, and FIG. 2 is a view taken along arrows 1--2 in FIG. Sub-agent: 1) Resurrection agent Ryo Hagiwara - Procedural amendment dated January 23, 1980 Mr. Kazuo Wakasugi, Commissioner of the Patent Office 1, Indication of the case, -1 Patent application filed on December 23, 1980 ( 1) 2. Title of the invention: Exhaust gas treatment device 3, relationship with the case of the person making the amendment Patent applicant address: 2-5-1-4, Marunouchi 2-5-1, Chiyoda-ku, Tokyo, Agent I3: Address: Toranomon, Minato-ku, Tokyo -Chome 16-2 Toranomon Chiyoda Building Telephone number (504) 1894 Name Patent attorney (7179) 1) Subject of the amendment (1) Contents of the amendment in the “Detailed Description of the Invention” column a of the specification ( 1) From the second line from the bottom of page 1 to the first line of page 2 of the specification: ``Honeycomb foam has been used in the filter.
The honeycomb carrier is made of cordierite (eordlerite) as the main raw material, and the honeycomb carrier has been used for the filter.
``The main raw material is ``Kaiseishi''.''

Claims (1)

[Claims] The present invention is characterized in that a filter for treating dust in exhaust gas is constructed of a material with a high dielectric constant, and a microwave dielectric heating device is provided for heating the filter and incinerating the collected dust. Exhaust gas treatment equipment