Electrostatic precipitator module and desulfurization system including the same

• US 10,532,364 B1
• Filed: 12/10/2018
• Issued: 01/14/2020
• Est. Priority Date: 10/04/2018
• Status: Active Grant

• Current Assignee: Doosan Heavy Industries and Construction Company Limited
• Original Assignee: Doosan Heavy Industries Construction Co., Ltd.
• Inventors: Moon, Sangchul, Lee, Jinwoon, Lee, Sangrin, Yim, Joonhyuk, Hwang, Jaedong
• Primary Examiner(s): Jones, Christopher P
• Application Number:
  US16/215,610
• Time in Patent Office: 400 Days
• CPC Class Codes: B01D 2251/11 Air
• CPC Class Codes: B01D 2251/404 of calcium
• CPC Class Codes: B01D 2251/606 Carbonates
• CPC Class Codes: B01D 2257/302 Sulfur oxides
• CPC Class Codes: B01D 53/1481 Removing sulfur dioxide or sulfur trioxide
• CPC Class Codes: B01D 53/504 characterised by a specific device
• CPC Class Codes: B01D 53/508 by treating the gases with solids
• CPC Class Codes: B01D 53/80 Semi-solid phase processes, i.e. by using slurries
• CPC Class Codes: B03C 2201/10 Ionising electrode with two or more serrated ends or sides
• CPC Class Codes: B03C 3/013 Conditioning by chemical additives, e.g. with SO3
• CPC Class Codes: B03C 3/017 Combinations of electrostatic separation with other processes, not otherwise provided for
• CPC Class Codes: B03C 3/08 characterised by presence of stationary flat electrodes arranged with their flat surfaces parallel to the gas stream
• CPC Class Codes: B03C 3/16 wet type
• CPC Class Codes: B03C 3/41 Ionising-electrodes
• CPC Class Codes: B03C 3/47 flat, e.g. plates, discs, gratings
• CPC Class Codes: B03C 3/78 by washing
• CPC Class Codes: B03C 3/86 Electrode-carrying means B03C3/40 takes precedence

Abstract

An electrostatic precipitator module and a desulfurization system are capable of easily discharging wash water from a wet electrostatic precipitator module. The electrostatic precipitator module includes an arrangement of discharge electrodes and collecting electrodes alternately disposed and spaced apart from each other, the discharge electrodes configured to be charged to a predetermined voltage for generating a corona discharge between the discharge electrodes and the collecting electrodes; and tie rods for fixing the discharge electrodes and the collecting electrodes. Each collecting electrode has a lower edge inclined downward with respect to the ground. The lower edge of each collecting electrode includes separate lower edge portions respectively inclined downward from opposite side ends of the collecting electrode and a lowermost point at which wash water is concentrated and discharged to a discharge guide installed directly under the lowermost points. The discharge guide has a width substantially smaller than the collecting electrode.

Claims

1. An electrostatic precipitator module comprising:

an arrangement of discharge electrodes and collecting electrodes alternately disposed and spaced apart from each other, the discharge electrodes configured to be charged to a predetermined voltage for generating a corona discharge between the discharge electrodes and the collecting electrodes; and

tie rods for fixing the discharge electrodes and the collecting electrodes,

wherein each of the collecting electrodes has a lower edge inclined downward with respect to the ground,

wherein each of the collecting electrodes includes a guide protrusion which is formed on a lower portion of each collecting electrode and is inclined downward toward a center of each collecting electrode such that wash water flowing along surfaces of the collecting electrode is transferred toward the center of the collecting electrode, the guide protrusion extending in a width direction of the collecting electrode, and

wherein the guide protrusion is open at a position corresponding to a widthwise center of each collecting electrode to collect the wash water flowing along surfaces of the collecting electrode at the center of the collecting electrode.

2. The electrostatic precipitator module according to claim 1, wherein the lower edge of each collecting electrode includes separate lower edge portions respectively inclined downward from opposite side ends of the collecting electrode.

3. The electrostatic precipitator module according to claim 1, wherein the lower edge of each collecting electrode includes a lowermost point at which wash water flowing down from the collecting electrode is concentrated and discharged to a discharge guide installed directly under the lowermost points.

4. The electrostatic precipitator module according to claim 3, wherein the discharge guide has a width smaller than that of the collecting electrode.

5. The electrostatic precipitator module according to claim 3, wherein the discharge guide has a width ranging from 1/100 to 1/10 of that of the collecting electrode.

6. The electrostatic precipitator module according to claim 3, wherein the discharge guide extends in a stacking direction of the collecting electrodes and has a bottom surface that decreases in height toward either extreme of the discharge guide.

7. The electrostatic precipitator module according to claim 3, wherein each collecting electrode has a fixing hole formed near the lower edge to receive a hanger fixing rod.

8. The electrostatic precipitator module according to claim 7, wherein:

the hanger fixing rod is coupled with a support hanger for supporting the discharge guide; and

the support hanger comprises a plurality of connection protrusions protruding upward for insertion of the lower portions of the respective collecting electrodes, and each of the connection protrusions has a support hole formed for insertion of the hanger fixing rod.

9. The electrostatic precipitator module according to claim 7, wherein the discharge guide comprises two sidewalls and a bottom plate connected to lower portions of the sidewalls, and the discharge guide has a plurality of support rings protruding upward from the sidewalls to be coupled to the hanger fixing rod.

10. The electrostatic precipitator module according to claim 1, further comprising:

a first reinforcing rod that is fixedly installed at and protrudes from a lower portion of each discharge electrode and is configured to be inserted into slots formed in first setting beams respectively disposed at opposite ends of the first reinforcing rod,

wherein the first setting beams are installed to pass through clearance grooves respectively formed in both ends of the lower side of each of the collecting electrodes.

11. The electrostatic precipitator module according to claim 10, further comprising a second reinforcing rod that is fixedly installed at and protrudes from an upper portion of each collecting electrode and is configured to be inserted into slots formed in second setting beams respectively disposed at opposite ends of the second reinforcing rod.

12. The electrostatic precipitator module according to claim 1, wherein the tie rods are inserted into the discharge electrodes to fix the discharge electrodes and comprise:

first tie rods passing through second holes formed in the collecting electrodes, and

second tie rods inserted into the collecting electrodes to fix the collecting electrodes while passing through first holes formed in the discharge electrodes.