JPS6253751A - Electric dust collector - Google Patents

Abstract

PURPOSE:To obtain an electric dust collector not corroded even if an inexpensive wet dust collector is used, by constituting a dust collection electrode of a conducive resin. CONSTITUTION:A cylindrical dust collection electrode 21 is constituted of a conductive resin such as conductive polypropylene and a discharge electrode 3 is arranged in the dust collection electrode 21 and connected to the negative pole of a DC power source 4 while the dust collection electrode 21 is connected to the positive pole of said power source 4. Because the dust collection electrode 21 is constituted of the conductive resin as mentioned above, an electrode more inexpensive than used heretofore with duralumin is obtained and a problem of rust and corrosion can be also eliminated and a durable one can be obtained. Because conductive propylene has chemical resistance, this electric dust collector can be adapted even in a field in which a conventional electric dust collector could not be used.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an electrostatic precipitator that captures solid or liquid particles suspended in a gas or liquid.

(Prior Art) As shown in FIG. 5, an electrostatic precipitator includes a plurality of tubular dust collecting electrodes 2 inside a case l equipped with a fluid inlet 11 and an outlet 12.
At the same time, a discharge electrode 3 is arranged inside the tubular dust collection electrode 2, and the discharge electrode 3 is connected to the negative electrode of a power source, and the dust collection electrode 2 is connected to the positive electrode, and a high DC voltage is applied between the two electrodes. Pipe-type dust collectors that apply voltage have been put into practical use. Also, as shown in Figure 6, tyy! ktrs1rv+lightning 4%kItIIJ
-164-7711D1-- A plurality of flat dust collection electrodes 20 are arranged in the slot, and a discharge electrode 3 is arranged between each of the dust collection electrodes 20, and the discharge electrode is used as the negative electrode of the power supply, The dust collecting electrode 3
A flat plate type dust collector has also been put into practical use, in which a high DC voltage is applied to one biode by connecting each to the positive electrode.

In such an electric precipitator, when a high DC voltage is applied to the discharge electrode and the collecting tube, a negative corona discharge occurs on the surface of the discharge electrode. On the other hand, when no discharge is occurring on the surface of the collecting electrode, most of the space in the bipolar tube, excluding the very thin ionosphere around the discharge electrode, is filled with negative gas ions or electrons generated in the ionosphere. Therefore, it is full. When the fluid to be treated flows between these two poles, the particles suspended in the fluid are negatively charged by the collision of ions or electrons, and are propelled to the positive dust collection pole surface according to the electric force between the two poles. Captured by the polar surface.

By the way, the dust collection electrode of the conventionally used electric precipitator is
It was composed of metals such as duralumin.

However, the metal such as duralumin that makes up the dust collection electrode is very expensive, and there is a problem in that the manufacturing cost of the dust collector increases.

Furthermore, metal dust collecting electrodes have the problem of rust and corrosion, especially when used in wet type dust collectors.

(Object of the Invention) The object of the present invention is to provide an electric precipitator equipped with a dust collecting electrode that is inexpensive and free from rust and corrosion. It is in.

(Means for Solving the Problems) According to the present invention, there is provided an electric dust collector in which the dust collecting electrode is made of a conductive resin.

(Examples) Hereinafter, the present invention will be specifically described based on illustrated examples.

FIG. 1 is a sectional view of essential parts showing an embodiment in which the present invention is applied to a tubular dust collector. In the figure, reference numeral 21 denotes a cylindrical dust collecting electrode, which is made of conductive resin such as conductive polypropylene. A discharge electrode 3 is disposed within the cylindrical dust collecting electrode 21, and the discharge electrode 3 is connected to the negative electrode of the DC power source 4, and the dust collecting electrode 21 is connected to the positive electrode.

FIG. 2 shows another embodiment of the present invention, and is a cross-sectional view of the main part showing an example applied to a flat plate dust collector. In this embodiment, the flat dust collecting electrode 22 is made of conductive polypropylene. The main electrode 3 is arranged between the dust collecting electrodes 22.

The discharge electrode 3 is connected to the negative electrode of a DC power source 4, and the dust collecting electrode 22 is connected to the positive electrode.

FIG. 3 shows still another embodiment of the present invention, and is a front view of main parts in which the present invention is applied to a two-stage dust collector. In the same figure, reference numeral 5 denotes a discharge section, which is composed of a discharge electrode 51 and a counter electrode 52. The counter electrode 52 is connected to the negative electrode of the DC power source 4, and
are each connected to the positive electrode. Reference numeral 6 denotes a dust collection section disposed opposite to the discharge section 5, which consists of a flat positive dust collection electrode 61 and a negative dust collection electrode 62, each made of a conductive resin such as conductive polypropylene. These dust collecting electrodes are arranged alternately, with the positive collecting electrode 61 being connected to the positive electrode of the DC power supply 4, and the negative collecting electrode 62 being connected to the negative electrode.

Fig. 4 shows still another embodiment of the present invention, and is a front view of the main part of the present invention applied to a dust collector using electrostatic induction. A first dust collecting electrode 71, 71 configured, and a second dust collecting electrode 72 disposed between the first dust collecting electrode and made of a non-conductive resin such as non-conductive polypropylene... 72
The first dust collecting electrodes 71 and 71 are connected to the positive and negative electrodes of the DC power source 4, respectively. The dust collector according to this embodiment is
Since electrostatic induction is utilized, the second dust collection electrode can be used as an electrode plate without electrical wiring, and sparks are not generated between the dust collection electrodes.

Although the present invention has been described above with reference to the illustrated embodiments, the present invention is not limited to only those shown in the embodiments, and various modifications can be made within the scope of the spirit of the present invention. Excluded from the scope of the invention (effects of the invention) As described above, according to the present invention, the dust collecting electrode is made of conductive resin, which is much cheaper than the conventionally used materials such as duralumin. At the same time, the problem of rust and corrosion can be solved, and a product □ that is durable against aging can be obtained. Note that if conductive polypropylene is used as the conductive resin, polypropylene has chemical resistance, so it can be applied to fields where conventional electrostatic precipitators cannot be used.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a main part showing one embodiment of the present invention, FIG. 2 is a sectional view of a main part showing another embodiment of the invention, and FIG. 13 is a sectional view of a main part showing still another embodiment of the invention FIG. 4 is a front view of a main part showing still another embodiment of the present invention, and FIGS. 5 and 6 are schematic diagrams of an electrostatic precipitator. 1... Case, 2, 20, 21, 22, 61, 62.
71.72... Dust collection electrode, 3... Discharge electrode, 4... Direct current element Akira -

Claims (1)

[Claims] An electric dust collector characterized in that a dust collection electrode is made of conductive resin.