Electrostatic precipitation device for removing particles in explosive gases

Patent metadata

Field	Value
Publication number	US-10399091-B2
Application number	US-201715400030-A
Country	US
Kind code	B2
Filing date	Jan 6, 2017
Priority date	Jan 8, 2016
Publication date	Sep 3, 2019
Grant date	Sep 3, 2019

Abstract

There is provided an electrostatic precipitation device of explosive exhaust gas particles that can remove by unipolar charging a particulate material such as SiO2 that is included in an explosive exhaust gas by charging the explosive exhaust gas with an indirect charging method of charging through ions that are injected from the outside.

First claim

The invention claimed is:

1. An electrostatic precipitation device for removing particles in explosive exhaust gases, the electrostatic precipitation device comprising:
a charging chamber where an explosive exhaust gas flows in and out;
a charging unit comprising a first high voltage application plate that is installed within the charging chamber and to which a unipolar high voltage is applied and an ion collection plate that is spaced apart from the first high voltage application plate in a direction intersecting a flow direction of the explosive exhaust gas and is grounded;
at least one ion injection part comprising a communication pipe that communicates with the inside of the charging chamber and a discharge unit that is installed at an external end portion of the communication pipe to generate ions of the same polarity as that of a high voltage that is applied to the discharge unit, and transferring the generated ions to the inside of the charging chamber through the communication pipe;
a dust collection chamber where a unipolar charged explosive exhaust gas that is discharged from the charging chamber flows in; and
an electrostatic dust collection unit that is installed within the dust collection chamber and comprising a second high voltage application plate, a collection plate that is spaced apart from the second high voltage application plate and is grounded, and a second water screen forming portion that forms a water screen at a plate surface of the collection plate.

2. The electrostatic precipitation device of claim 1 , wherein the second high voltage application plate is installed such that a plate surface thereof is located at one side surface within the dust collection chamber, and the collection plate is installed such that a plate surface thereof is opposite to the second high voltage application plate at the other side surface within the dust collection chamber and is disposed in a vertical direction of the dust collection chamber.

3. The electrostatic precipitation device of claim 1 , wherein the collection plate is hydrophilic surface processed.

4. The electrostatic precipitation device of claim 2 , wherein the second water screen forming portion comprises:
a spray unit that is disposed in a horizontal direction of the collection plate to spray a cleaning liquid to the upper end of the collection plate such that a cleaning liquid drops along a surface of the collection plate; and
a cleaning liquid supply unit that supplies a cleaning liquid to the spray unit.

5. The electrostatic precipitation device of claim 4 , wherein the spray unit is a plurality of sprayers that are arranged in a horizontal direction of the collection plate or a pipe in which a plurality of nozzles are arranged in a horizontal direction of the collection plate.

6. The electrostatic precipitation device of claim 1 , wherein the first high voltage application plate is installed such that a plate surface thereof is located as an upper surface and a lower surface at an upper portion within the charging chamber, and the ion collection plate is installed such that a plate surface thereof is opposite to a plate surface of the first high voltage application plate at a lower portion within the charging chamber, and
the communication pipe is coupled to the charging chamber such that generated ions are injected between the high voltage application plate and the ion collection plate.

7. The electrostatic precipitation device of claim 1 , comprising a plurality of ion injection parts including the ion injection part, wherein the plurality of ion injection parts are separately arranged in a flow direction of the explosive exhaust gas.

8. The electrostatic precipitation device of claim 7 , wherein arrangement gaps of the plurality of ion injection parts are constantly formed, and
the arrangement gap is larger than a distance between the first high voltage application plate and the ion collection plate.

9. The electrostatic precipitation device of claim 1 , wherein the ion injection part further comprises a fluid inlet that an external fluid is injected through and forms fluid flow to the charging chamber side along the inside of the communication pipe.

10. The electrostatic precipitation device of claim 9 , wherein the injected external fluid comprises ozone that primarily reacts a nitrogen compound among components of the explosive exhaust gas.

11. The electrostatic precipitation device of claim 10 , wherein the cleaning liquid that is sprayed from the second water screen forming portion comprises a reducing solution that reduces the primarily reacted nitrogen oxide of the explosive exhaust gas.

12. The electrostatic precipitation device of claim 1 , wherein the ion injection part further comprises a flow velocity increase portion having a plurality of through-holes and that is installed in a direction intersecting a fluid flow direction of the communication pipe.

13. The electrostatic precipitation device of claim 1 , wherein the first high voltage application plate is installed such that a plate surface thereof is located at one side surface within the charging chamber, and the ion collection plate is installed such that a plate surface thereof is opposite to the first high voltage application plate at the other side surface within the charging chamber and is disposed in a vertical direction of the charging chamber.

14. The electrostatic precipitation device of claim 13 , further comprising a first water screen forming portion that forms a water screen at the plate surface of the ion collection plate,
wherein the first water screen forming portion comprises:
a spray unit that sprays a cleaning liquid to the upper end of the ion collection plate such that the cleaning liquid drops along a surface of the ion collection plate; and
a cleaning liquid supply unit that supplies the cleaning liquid to the spray unit.

15. The electrostatic precipitation device of claim 1 , further comprising a bypass pipe that is branched from an outflow pipe of the dust collection chamber and is connected with the fluid inlet of the ion injection part.

16. An electrostatic precipitation device for removing particles in explosive exhaust gases, the electrostatic precipitation device comprising:
a charging chamber where an explosive exhaust gas flows in and out;
a charging portion comprising a first high voltage application plate that is installed within the charging chamber and an ion collection plate that is separated from the first high voltage application plate;
an ion injection part that communicates with the inside of the charging chamber and that injects ions;
a dust collection chamber that is connected with the charging chamber and that collects particles of the explosive exhaust gas;
a first high voltage generator that is connected with the charging portion; and
a second high voltage generator that is connected with the ion injection part and that is grounded together with the first high voltage generator,
wherein the ion collection plate is in an electrically ground state,
wherein the first high voltage generator comprises:
a first unipolar terminal that is connected with the first high voltage application plate; and
a first ground terminal that is connected with the ion collection plate and that is electrically grounded, and
wherein the second high voltage generator comprises:
a second unipolar terminal that is connected with the ion injection part; and
a second ground terminal that is connected with the ion collection plate.

17. An electrostatic precipitation device for removing particles

Assignees

• Korea Inst Mach & Materials

Inventors

• Kim Yong-Jin
• Kim Hak Joon
• Han Bangwoo
• Woo ChangGyu

Classifications

• B03C2201/10

  Ionising electrode with two or more serrated ends or sides · CPC title

• B03C3/60

  Use of special materials other than liquids · CPC title

• B03C3/41

  Ionising-electrodes · CPC title

• B03C3/08

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

• B03C3/019

  Post-treatment of gases · CPC title