JPH0760157A - Electrostatic precipitator - Google Patents

Abstract

PURPOSE:To provide an electrostatic precipitator enabling to easily wash an electrode plate without generating wear and corrosion on the electrode plate. CONSTITUTION:Raw material powder, etc., which are stuck and deposited with a plasticizer 101 on the electrode plate, are washed by providing an electrode plate washing nozzle 12 jetting a washing liquid 105 to the electrode plate at the upper part of a dust collecting chamber 3 inside a main body tower 1, and connecting a storage tank 9 storing the washing liquid 105 and the washing nozzle 12 for electrode plate with a feed pipe 11 via a feeding pump 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrostatic precipitator.

[0002]

2. Description of the Related Art When manufacturing products such as films and sheets with plastics such as polyvinyl chloride, the raw material powder is mixed with a viscous plasticizer such as dioctyl phthalate and the like and the material is kneaded into a paste and heated. It is being processed. At this time, the kneaded plasticizer is heated to become extremely fine mist-like submicron particles and is discharged from the material. Therefore, the plasticizer is discharged to the outside of the factory through a ventilation duct. Since the plasticizer that has become submicron particles has a very large specific surface area, if it is released into the atmosphere as it is, even a small amount of plasticizer becomes white smoke, which causes a problem as visible pollution. For this reason, an electric dust collector for removing the plasticizer is provided in the ventilation duct line.

FIG. 5 shows such a conventional electrostatic precipitator. Plasticizer 1 released as mist from the material
The exhaust gas 102 containing 01 is sent to the dust collecting chamber 23 of the main body tower 21 through the ventilation duct 22, and is passed between the discharge electrode and the dust collecting electrode to which the high voltage is applied by the high voltage power supply 24, The plasticizer 101 in the exhaust gas 102 is charged and collected by the Coulomb force in the dust collecting electrode. The collected plasticizer 101 flows down on the dust collecting extreme, is accumulated in the collecting chamber 25, and is collected from the drain 26. On the other hand, the exhaust air 102 from which the plasticizer 101 has been removed is discharged to the outside from the exhaust pipe 27 by the delivery fan 28.

At the time of collecting the plasticizer 101, not only the plasticizer 101 but also the raw material powder mixed in the exhaust gas 102 is electrically charged and collected by the dust collecting electrode and the discharge electrode. The raw material powder collected on the dust collecting electrode or the discharge electrode is the plasticizer 10
In some cases, the viscosity of No. 1 makes it easy to stick and deposit on these electrode plates, reduce the charging effect by the electrode plates, and significantly deteriorate the dust collecting ability. Therefore, the cleaning water 103 is directed from above the dust collecting chamber 21 toward the electrode plate to the nozzle 2
9 to spray these electrode plates on a regular basis. In addition, in order to improve the cleaning effect, the cleaning water 103
In some cases, the surface active agent 104 may be added for cleaning.

[0005]

However, since the plasticizer 101 is viscous and water-insoluble, the raw material powder adhered and deposited on the electrode plate by the plasticizer 101 is thoroughly washed off with the washing water 103. Takes a very long time, the work efficiency is very poor, and the electrode plate may be worn. Also, wash water 103
Although the cleaning time can be shortened to some extent if the surface active agent 104 is added to the cleaning solution, the corrosion of the electrode plate is likely to be promoted, which may rather deteriorate the electrode plate.

[0006]

In order to solve the above-mentioned problems, the present invention relates to an electrostatic precipitator for collecting mist of a viscous liquid by an electrode plate to which a voltage is applied, and a viscosity compatible with the viscous liquid. An electrode plate cleaning nozzle for spraying a cleaning liquid containing a liquid onto the electrode plate, and a cleaning liquid supply means for supplying the cleaning liquid to the electrode plate cleaning nozzle are provided.

Further, the above-mentioned electrostatic precipitator may be provided with a cleaning liquid heating means for heating the cleaning liquid fed to the electrode plate cleaning nozzle.

[0008]

In the electrostatic precipitator having the above-mentioned structure, the cleaning liquid containing the viscous liquid that is compatible with the viscous liquid collected in the electrode plate is sprayed from the electrode plate cleaning nozzle to the electrode plate by the cleaning liquid feeding means. The board is easily washed.

By heating the cleaning liquid fed to the electrode plate cleaning nozzle by the cleaning liquid heating means, the temperature of the cleaning liquid is raised and the viscosity of the cleaning liquid is lowered.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the electrostatic precipitator according to the present invention is applied when kneading plastics will be described with reference to FIG. Note that FIG. 1 is a schematic configuration diagram thereof.

As shown in FIG. 1, an exhaust gas 102 containing a plasticizer 101, which is a viscous liquid such as mist-like dioctyl phthalate generated in a plastic kneading operation, is provided at the upper part of the main tower 1 to the main tower 1. The exhaust duct 2 for sending in is connected. A dust collecting chamber 3 in which a discharge electrode and a dust collecting electrode are arranged is formed in a central portion of the inside of the main body tower 1, and a high voltage power supply 4 is connected to the discharge electrode. A recovery chamber 5 for recovering the plasticizer 101 is formed below the inside of the main body tower 1, and the plasticizer 101 can be drained from the drain 6. Between the dust collection chamber 3 and the recovery chamber 5 of the main body tower 1, a delivery fan 8 connected to an exhaust pipe 7 for delivering the exhaust 102 to the outside is connected.

A cleaning liquid 105 such as dioctyl phthalate, which is the same viscous liquid as the plasticizer 101, is provided on the side of the main body tower 1.
A storage tank 9 for storing The storage tank 9 is connected to a delivery pump 10 that delivers the cleaning liquid 105 in the storage tank 9. One end side of a feed pipe 11 is connected to the delivery pump 10, and the other end side is provided above the dust collection chamber 3 inside the main body tower 1. This supply pipe 11
On the other end side of the cleaning liquid 10 toward the discharge electrode and the dust collecting electrode.
An electrode plate cleaning nozzle 12 for spraying 5 in a shower shape is provided.

In order to remove the plasticizer 101 of the exhaust gas 102 with such an electrostatic precipitator, it may be carried out in the same manner as in the conventional case. That is, the exhaust gas 102 containing the plasticizer 101 generated by the kneading operation is sent to the dust collecting chamber 3 of the main body tower 1 through the ventilation duct 2, and the discharge electrode and the dust collecting electrode to which the high voltage is applied by the high voltage power source 4 are connected. Exhaust 10 by passing between
The plasticizer 101 in 2 is charged and collected by the Coulomb force in the dust collecting electrode, and the exhaust air 102 from which the plasticizer 101 is removed is discharged to the outside through the exhaust pipe 7 by the delivery fan 8 and is collected in the dust collecting electrode. The collected plasticizer 101 is recovered in the recovery chamber 5 by gravity.

Then, a plasticizer 10 is placed on the discharge electrode and the dust collecting electrode.
In order to wash the raw material powder and the like that are fixed and accumulated in step 1, the following procedure may be performed. That is, the cleaning liquid 1 in the storage tank 9
05 is sprayed from the electrode plate cleaning nozzle 12 to the discharge electrode and the dust collecting electrode by the delivery pump 10 through the delivery pipe 11.
As a result, the raw material powder and the like on which the plasticizer 101 is fixed as a binder on these electrode plates are easily softened by the same cleaning liquid 105 as the plasticizer 101 and washed away from the electrode plates, and the plasticizer 101 is transferred to the recovery chamber 5. The cleaning liquid 105, raw material powder, etc. are collected. Therefore, the electrode plate is easily cleaned without being deteriorated or corroded.

In this embodiment, since the same cleaning liquid 105 as the plasticizer 101 was used, the plasticizer 1 recovered in the recovery chamber 5 was used.
The mixed liquid of 01 and the cleaning liquid 105 does not need to be separated, and can be reused as a plasticizer or a cleaning liquid only by removing the raw material powder contained therein. In addition, when the collected plasticizer or the cleaning liquid does not require uniformity in quality, it is not particularly necessary to make the plasticizer and the cleaning liquid the same, as long as the cleaning liquid contains a viscous liquid compatible with the plasticizer. good.

A second embodiment of the electrostatic precipitator according to the present invention will be described with reference to FIG. However, the same members as those in the above-described embodiment are designated by the same reference numerals as those in the above-described embodiment, and the description thereof will be omitted. Note that FIG. 2 is a schematic configuration diagram thereof.

As shown in FIG. 2, a strainer 13 is connected to the side of the recovery chamber 5 of the main tower 1, a delivery pump 10 is connected to the strainer 13, and the delivery pump 10 feeds the strainer 13. It is connected to an electrode plate cleaning nozzle 12 via a pipe 11.

That is, in the above-mentioned embodiment, the electrode plate was cleaned using the new cleaning liquid 105, but in this embodiment,
The recovered plasticizer 101 is used as a cleaning liquid.
At this time, since the raw material powder and the like are mixed in the collected plasticizer 101, it is better to remove the raw material powder and the like using the strainer 13 and then send the raw material powder to the electrode plate cleaning nozzle 12. The raw material powder removed by the strainer 13 is
It is appropriately extracted from the strainer 13 by the blow pipe 14. As a result, the amount of cleaning liquid used for cleaning can be saved.

The strainer 13 may be arbitrarily set according to the degree of contamination of the collected plasticizer 101, and depending on the type of strainer, a strainer may be provided between the delivery pump and the electrode plate cleaning nozzle.

A third embodiment of the electrostatic precipitator according to the present invention will be described with reference to FIG. However, the same members as those in the above-described embodiment are designated by the same reference numerals as those in the above-described embodiment, and the description thereof will be omitted. Note that FIG. 3 is a schematic configuration diagram thereof.

As shown in FIG. 3, a heating device 15 for heating the cleaning liquid 105 from the storage tank 9 is provided between the delivery pump 10 and the electrode plate cleaning nozzle 12.

That is, by heating the cleaning liquid 105, which is a viscous liquid, to reduce the viscosity of the cleaning liquid 105,
The cleaning effect can be facilitated by facilitating the flow in the supply pipe 11 and the ejection from the electrode plate cleaning nozzle 12, and more easily softening the plasticizer 101 that fixes the raw material powder or the like to the electrode plate as a binder. To improve.

The heating device may be provided between the storage tank 9 and the delivery pump 10, or the storage tank 9 may be provided with a heating device.

A fourth embodiment of the electrostatic precipitator according to the present invention will be described with reference to FIG. However, the same members as those in the above-described embodiment are designated by the same reference numerals as those in the above-described embodiment, and the description thereof will be omitted. Note that FIG. 4 is a schematic configuration diagram thereof.

As shown in FIG. 4, this embodiment is a combination of the second embodiment and the third embodiment.

That is, the plasticizer 10 recovered in the recovery chamber 5
1 is heated by the heating device 15, and the electrode plate cleaning nozzle 12 is heated.
The electrode plate is sprayed toward the electrode plate to clean the electrode plate. This saves the amount of cleaning liquid used and
The cleaning effect is improved.

[0027]

As described above, in the electrostatic precipitator according to the present invention, the electrode plate is washed with the cleaning liquid containing the viscous liquid that is compatible with the viscous liquid collected in the electrode plate. Is greatly shortened, and the wear and corrosion of the electrode plate are significantly reduced.

Further, since the cleaning liquid sent to the electrode plate cleaning nozzle is heated by the cleaning liquid heating means to raise the temperature of the cleaning liquid and reduce its viscosity, the cleaning liquid is easily supplied to the electrode plate cleaning nozzle, The cleaning effect on the electrode plate is further improved.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of an electrostatic precipitator according to the present invention.

FIG. 2 is a schematic configuration diagram of the second embodiment.

FIG. 3 is a schematic configuration diagram of the third embodiment.

FIG. 4 is a schematic configuration diagram of a fourth embodiment.

FIG. 5 is a schematic configuration diagram of a conventional electrostatic precipitator.

[Explanation of symbols]

 1 Main Tower 3 Dust Collection Room 5 Collection Room 9 Storage Tank 10 Delivery Pump 12 Electrode Plate Cleaning Nozzle 13 Strainer 15 Heating Device 101 Plasticizer 102 Exhaust 105 Cleaning Solution

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Marumoto Akiko 2-8-25 Niihama, Arai-cho, Takasago, Hyogo Prefecture Takahishi Engineering Co., Ltd.

Claims (2)

[Claims] 1. An electrostatic precipitator for collecting mist of a viscous liquid by an electrode plate to which a voltage is applied, and an electrode plate cleaning nozzle for spraying a cleaning liquid containing a viscous liquid compatible with the viscous liquid onto the electrode plate. An electrostatic precipitator comprising: a cleaning liquid supply unit that supplies the cleaning liquid to the electrode plate cleaning nozzle. 2. The electrostatic precipitator according to claim 1, further comprising a cleaning liquid heating means for heating the cleaning liquid sent to the electrode plate cleaning nozzle.