Horizontal electrostatic precipitator and electrostatic precipitation method using the same

Patent metadata

Field	Value
Publication number	US-11577256-B2
Application number	US-202016856286-A
Country	US
Kind code	B2
Filing date	Apr 23, 2020
Priority date	May 22, 2019
Publication date	Feb 14, 2023
Grant date	Feb 14, 2023

Abstract

Disclosed herein is an electrostatic precipitation method using an electrostatic precipitator including a collection module having a collection electrode and a discharge electrode, a housing having an internal partition wall formed therein, an inlet-side passage switching member, and an outlet-side passage switching member. The electrostatic precipitation method includes collecting dust by applying a voltage to the discharge electrode while gas flows, closing some of the flow spaces, divided by the internal partition wall using the passage switching members, and performing dust collection for one of the opened flow spaces by applying a voltage to the discharge electrode therein, and performing washing for at least one of the closed flow spaces by supplying washing water to the collection electrode therein.

First claim

What is claimed is:

1. A horizontal electrostatic precipitator comprising:
a housing having an inlet duct, into which a gas is introduced, and an outlet duct from which the gas is discharged;
an internal partition wall extending in a direction of flow of the gas in the housing and configured to respectively divide spaces within the housing;
a plurality of passage switching members in the respectively divided spaces to control the flow of the gas;
a collection module in the housing and comprising a plurality of discharge electrodes, to which a voltage is applied, and a plurality of collection electrodes disposed between the respective discharge electrodes, the plurality of collection electrodes being grounded, and the collection module being configured to collect dust; and
a washing water feeder configured to spray washing water to the collection module and to selectively spray the washing water to some of the respectively divided spaces.

2. The horizontal electrostatic precipitator according to claim 1 , wherein the inlet and outlet ducts are on respective sides of the housing, and the plurality of passage switching members are in the inlet and outlet ducts, respectively while being rotatable relative to the housing.

3. The horizontal electrostatic precipitator according to claim 1 , further comprising a controller configured to control the washing water feeder to supply the washing water only to one of the respectively divided spaces, which is closed so that inflow and outflow of air are blocked by controlling the passage switching members.

4. The horizontal electrostatic precipitator according to claim 1 , further comprising a washing water treatment device beneath the collection module to accommodate the washing water dropping from the collection module, wherein the washing water treatment device comprises:
a reservoir configured to accommodate the washing water;
an adsorption belt in an endless-track form;
a roller operatively connected to the adsorption belt to move the adsorption belt; and
a scraper configured to scrape off foreign substances attached on the adsorption belt.

5. The horizontal electrostatic precipitator according to claim 4 , wherein the adsorption belt has a mesh-like structure.

6. The horizontal electrostatic precipitator according to claim 5 , wherein a portion of the adsorption belt is submerged in the washing water and the other portion of the adsorption belt is above the washing water.

7. The horizontal electrostatic precipitator according to claim 5 , wherein the scraper comprises a support rod installed vertically on the bottom of the reservoir and an elastic tip protruding upward from the support rod.

8. The horizontal electrostatic precipitator according to claim 4 , wherein the scraper comprises a rotary rod and a plurality of paddles protruding from an outer peripheral surface of the rotary rod, the paddles being spaced apart from each other in a circumferential direction of the rotary rod.

9. The horizontal electrostatic precipitator according to claim 4 , wherein:
the washing water treatment device comprises two support rollers and first and second diversion rollers disposed between the support rollers, the first diversion roller being configured to support a lower end of the adsorption belt to move upward, the second division roller being configured to support the lower end of the adsorption belt to move downward; and a blocking wall is installed in the reservoir to separate a space, in which the scraper is located, from a remaining space.

10. The horizontal electrostatic precipitator according to claim 9 , wherein the first diversion roller supports the adsorption belt to be positioned above an upper end of the blocking wall, and the second diversion roller supports the adsorption belt to be positioned beneath the upper end of the blocking wall.

11. The horizontal electrostatic precipitator according to claim 10 , wherein the scraper is installed to abut on the adsorption belt between the second diversion roller and an associated one of the support rollers.

12. The horizontal electrostatic precipitator according to claim 11 , wherein a separation container is installed beneath the scraper and positioned in the space separated by the blocking wall.

Assignees

• Doosan Enerbility Co Ltd

Inventors

• Lee Jin Woon
• Lee Sang Rin
• Hwang Jae Dong
• Moon Sang Chul

Classifications

• C02F2103/34

  from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 · CPC title

• B03C3/78

  by washing · CPC title

• B03C3/08 Primary

  characterised by presence of stationary flat electrodes arranged with their flat surfaces parallel to the gas stream · CPC title

• B03C3/16

  wet type · CPC title

• B03C3/366

  located in the filter, e.g. special shape of the electrodes · CPC title