Scrubber for cleaning of a gas

Patent metadata

Field	Value
Publication number	US-11141690-B2
Application number	US-201816628440-A
Country	US
Kind code	B2
Filing date	Jun 19, 2018
Priority date	Aug 1, 2017
Publication date	Oct 12, 2021
Grant date	Oct 12, 2021

Abstract

A scrubber for cleaning a gas comprises a casing extending along a longitudinal central axis and enclosing a scrubbing chamber. The casing has a gas inlet and a gas outlet. The casing is configured to permit flow of the gas through the scrubbing chamber in a flow direction from the gas inlet to the gas outlet. A deflector device in the scrubbing chamber between the gas inlet and outlet forms a gas passage between the deflector device and the casing. The deflector device comprises an upstream surface facing the gas inlet. A spraying nozzle is configured to spray a scrubbing liquid into the scrubbing chamber and the gas flow. A separation device comprises a shield element and is arranged between the upstream surface of the deflector device and the gas inlet. The shield element shields the upstream surface from the gas flow and is perforated by a plurality of holes.

First claim

The invention claimed is:

1. A scrubber for cleaning of a gas, comprising
a casing extending along a longitudinal central axis (x) and enclosing a scrubbing chamber, wherein the casing has a gas inlet for the gas to be cleaned, which extends into the scrubbing chamber, and a gas outlet for the cleaned gas, which extends out from the scrubbing chamber, wherein the casing is configured to permit a gas flow of the gas to flow through the scrubbing chamber in a flow direction from the gas inlet to the gas outlet,
a deflector device provided in the scrubbing chamber between the gas inlet and the gas outlet and forming a gas passage between the deflector device and the casing, which deflector device comprises an upstream surface facing the gas inlet, and
a spraying nozzle configured to spray a scrubbing liquid into the scrubbing chamber and the gas flow,

a separation device, which comprises a shield element arranged between the upstream surface of the deflector device and the gas inlet and at least partly shielding the upstream surface from the gas flow, which shield element is perforated by a plurality of holes, wherein the shield element is arranged so as to provide a collecting gap between the upstream surface and the shield element, and the holes extend through the shield element from the scrubbing chamber to the collecting gap to permit scrubbing liquid to enter the collecting gap, and wherein the separation device comprises a drain outlet configured to drain scrubbing liquid from the collecting gap.

2. The scrubber according to claim 1 , wherein the shield element tapers towards the gas inlet.

3. The scrubber according to claim 1 , wherein the shield element comprises a portion defining a truncated cone.

4. The scrubber according to claim 1 , wherein the drain outlet extends from a central area of the shield element.

5. The scrubber according to claim 1 , wherein the longitudinal central axis (x) extends through the drain outlet.

6. The scrubber according to claim 1 , further comprising a drain pipe communicating with the drain outlet.

7. The scrubber according to claim 6 , wherein the drain pipe extends towards the gas inlet.

8. The scrubber according to claim 1 , wherein the separation device comprises a wall ( 46 ) extending from an outer edge of the shield element towards the gas outlet.

9. The scrubber according to claim 1 , wherein the deflector device comprises a downstream deflector having a downstream surface facing the gas outlet, wherein a projection of the downstream deflector in a transverse plane extending perpendicularly to the longitudinal central axis is larger than a projection of the shield element in the transverse plane.

10. The scrubber according to claim 1 , wherein the holes of the shield element cover a total hole area that is 25-45% of the total area of the shield element.

11. The scrubber according to claim 1 , wherein the shield element defines a space in which the deflector device is received such that the shield element at least partly encloses the upstream surface of the deflector device.

12. The scrubber according to claim 1 , wherein the upstream surface of the deflector device tapers towards the gas inlet.

13. The scrubber according to claim 1 , wherein the upstream surface of the deflector device comprises a portion defining a truncated cone.

Assignees

• Alfa Laval Corp Ab

Inventors

• Kruse Mortensen Ruddi

Classifications

• B01D53/1481

  Removing sulfur dioxide or sulfur trioxide · CPC title

• B01D2257/30

  Sulfur compounds · CPC title

• B01D47/06 Primary

  Spray cleaning · CPC title

• B01D5/003

  within column(s) · CPC title

• F01N2240/20

  a flow director or deflector · CPC title