JPS59127623A - Dust collecting and incinerating apparatus - Google Patents

Abstract

PURPOSE:To enable longtime continuous operation without clogging, by enabling the incineration and gasification of accumulated dust by utilzing arc discharge in such a state that a plural number of electrodes are arranged on the surface of the dust collecting side of an insulating prous filter so as to leave the intervals therebetween. CONSTITUTION:To the surface of the dust collecting side of a dust collecting apparatus constituted of such a mechanism that gas flowlines 141, 142 are formed between a plurality of porous insulating thin walls while ceramic seal joint material 15, 16 are provided to the outlet sides and the inlet sides of these flowlines and exhaust gas A is flowed into the gas flowline 142 while passing through the porous thin wall 13 from the gas flowline 141, plural electrodes 12 are arranged so as to provided the intervals therebetween. The exhaust gas A containing carbon particles is flowed to this dust collecting and incinerating apparatus to collect said particles by the porous thin wall 13. At the point of time when the carbon particles are accumulated to a certain degree and pressure loss starts to generate, voltage is applied between the electrodes 12 positioned at both ends. Arc discharge is generated by applying voltage to oxide and gasifying the carbon particles.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dust collection and incineration device that collects and incinerates fine particles contained in exhaust gas and the like.

Diesel engine exhaust gas and the like contain vapor-phase precipitated casen particles, and most of these particles are as fine as 1 μm or less. For this reason, a ceramic filter having fine pores is used as a dust collector for this exhaust gas. As shown in FIGS. 1 and 2, this ceramic filter has a gas flow path 21 er2 between a large number of porous thin walls 1.
2 and gas flow path 2! The outlet side of the gas flow path 2□ is sealed with a ceramic port sealing material 3, and the inlet side of the gas flow path 2□ is sealed with a ceramic port sealing material 4. In this case, the gas passage 21 whose outlet side is sealed is not sealed at its inlet side, and the gas passage 22 whose inlet side is sealed is sealed at its outlet side, so that there is no
The exhaust gas A flows from the gas flow path 21 through the porous thin wall 1 into the gas flow path 22.

In this ceramic filter, the exhaust gas A is made of porous thin wall 1
Dust is collected and purified as it passes through the pipe, but since this is a mechanical purification method, it quickly becomes clogged, resulting in extremely high pressure loss. For this reason, there is a problem that it cannot withstand long-term use.The present invention was made in view of the above circumstances, and its purpose is to incinerate and gasify accumulated dust using arc discharge. The present invention aims to provide a dust collection and incineration device that can be operated continuously for a long period of time.

In other words, the present invention arranges a plurality of electrodes at intervals on the dust collection side surface of an insulated porous filter that collects dust by passing a dust-containing gas therethrough, and collects the dust by applying a voltage between the electrodes at both ends. A dust collection and incineration device characterized by incinerating collected dust.

The present invention will be described below with reference to illustrative embodiments. FIG. 3 is a schematic sectional view of a dust collection and incineration apparatus according to the present invention. This device includes an insulating porous filter 11, a plurality of electrodes 12, and metal.

This filter 11 has a structure similar to that shown in FIG. 1 and FIG.
, 142 are formed, and ceramic port sealing materials 15 and 16 are provided on the outlet and inlet sides of the gas flow paths 141 and 142, so that the exhaust gas A passes through the gas flow path 141 and the porous thin wall 13. 142.

Examples of its structure include those shown in Table 1 below.

Table 1 (Filter Structural Characteristics) On the other hand, the plurality of electrodes 12 are connected to the surface of the porous thin wall 13 that is in contact with the gas flow path 141, which has an open inlet side and a closed outlet side, that is, the dust collection side surface of the insulating porous filter 11. Burning is done by page etc.
They are placed at intervals. In this case, the electrode 120 width a
is about 0.5 to 2 mm for good arc discharge.
The distance d is preferably 0.5 to 5WII11.

Note that a porous metal plate 17 that is large enough to allow gas to pass therethrough may be provided on the back surface of the insulating porous filter J1 as shown in FIG.

When exhaust gas A containing carbon particles is passed through this dust collection and incineration device, the carbon particles are mechanically collected by the porous thin wall 13. When a certain amount is deposited and pressure loss begins to occur, a voltage is applied between the electrodes 12 at both ends.

The applied voltage is a pulse voltage or an alternating pulse voltage of several kV.
~10 kV is preferable. Due to the application of voltage, arc discharge occurs in a pulsed manner on the surface, and the collected kerf]
? The particles are oxidized and gasified.

The pulse voltage is applied when the exhaust gas temperature rises (600
℃~700℃), the electrode 12
An electric capacitance is formed between the two and the arc can be propagated more reliably.

As explained above, according to the invention, when dust accumulates to a certain extent and the pressure drop increases, arc discharge occurs, incineration, and gasification, resulting in a remarkable effect that allows continuous operation for a long time. play.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a structural model of a conventionally used ceramic filter, Fig. 2 is a sectional view thereof, and Fig. 3 is a structural model diagram of a dust collection and incineration device showing an embodiment of the present invention. Figure 4 shows the symbols used for the structural characteristics of the filter in Table 1. t, p, and h, and Figure $5 is an explanatory diagram of the main parts of a dust collection and incineration device showing another embodiment of the present invention. 11... Insulated porous filter, 12... Electrode, 13
... Porous thin wall, 141, 142 ... Gas flow path, 1
5.16... Ceramic mouth sealing material, 17... Porous metal plate.

Claims (1)

[Claims] Multiple electrodes are placed at intervals on the dust collection side surface of an insulated porous filter that collects dust by passing dust-containing gas therethrough, and a voltage is applied between the electrodes at both ends to incinerate the collected dust. A dust collection and incineration device characterized by: