# US 8,540,811 B2 · Scrubber > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,540,811 B2 - Document ID: US8540811B2 - Status: Granted - Kind: B2 - Application number: 10/586,392 - Filed: 2005-02-16 - Published: 2007-05-24 - Granted: 2013-09-24 - Earliest claimed: 2004-02-20 - Assignees: Gotaverken Miljo AB - Applicants: Ulf Hagg; Lennart Gustafsson - Inventors: Ulf Hagg; Lennart Gustafsson - Web page: https://patentgrep.com/patent/US8540811B2 ## CPC - B01D 53/18: Absorbing units; Liquid distributors therefor (B01D3/16, B01D3/26, B01D3/30 take precedence; packing elements B01J19/30, B01J19/32) - B01D 53/78: with gas-liquid contact - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) ## Abstract A scrubber for the cleaning of gases containing several scrubber stages (1-4), where the scrubber stages are arranged in a scrubber tower with the different stages at different levels above each other in the scrubber tower. At least one of the scrubber stages (2-4) above the lowest scrubber stage (1) comprises, according to the invention, a ring-shaped tank (10, 15, 20) arranged inside the scrubber tower, which ring shaped tank (10, 15, 20) is arranged surrounding a central channel (9, 14, 19) through which the gas that is to be cleaned can pass upwards. ## Claims ### Claim 1 A scrubber for the cleaning of gases, comprising: a plurality of scrubber stages (1-4) arranged in a scrubber tower with different ones of the plurality of scrubber stages at different levels above each other in the scrubber tower, including a lowest scrubber stage (1) and upper scrubber stages (2, 3, 4) all located above the lowest scrubber stage (1), each of the upper scrubber stages (2, 3, 4) comprising a ring-shaped tank (10, 15, 20) arranged inside the scrubber tower, each ring-shaped tank (10, 15, 20) arranged surrounding a central channel (9, 14, 19) through which a gas to be cleaned can pass upwards, each scrubber stage (1, 2, 3, 4) of the scrubber having a circulation pump (27, 30, 34) arranged to feed, through feed pipes (29, 33, 37), scrubber fluid from a tank (7, 10, 15, 20) at a bottom of a respective one of the scrubber stages (1, 2, 3, 4) to spray beams (8, 13, 18, 23) arranged at an upper part of the respective one of the scrubber stages (1, 2, 3, 4) for distribution over a cross-section of the respective one of the scrubber stages (1, 2, 3, 4) in a direction against an upwards flowing gas, and a bottom of each of the upper scrubber stages (2, 3, 4) further comprising a separation trough (11, 16, 21), located above a corresponding ring-shaped tank (10, 15, 20) of the upper scrubber stages (2, 3, 4), that separates the scrubber fluid from the upwards flowing gas, each said separation trough (11, 16, 21) comprising obliquely placed laminae (25) for leading scrubber fluid that arrives from above to trough channels (26) arranged under the laminae (25), said trough channels (26) having open ends configured so that the scrubber fluid is led directly to the corresponding ring-shaped tank (10, 15, 20) located underneath the separation trough (11, 16, 21). ### Claim 2 (depends on 1) The scrubber according to claim 1, wherein each circulation pump is connected to a respective ring-shaped tank and located at essentially a same level as the respective ring-shaped tank. ### Claim 3 (depends on 2) The scrubber according to claim 2, wherein the circulation pump is arranged outside of the respective ring-shaped tank and outside of the scrubber tower, and connected by means of an inlet pipe to a connection on the respective ring-shaped tank. ### Claim 4 (depends on 2) The scrubber according to claim 2, wherein a pump tank (28) is arranged outside of at least one of the ring-shaped tanks and outside of the scrubber tower directly connected to the at least one of the ring-shaped tank tanks through a connection, and wherein the circulation pump arranged to feed the scrubber fluid from the at least one of the ring-shaped tanks is arranged in or connected to the pump tank (28). ### Claim 5 (depends on 1) The scrubber according to claim 1, wherein the circulation pumps arranged to feed the scrubber fluid from at least one of the ring-shaped tanks is arranged on the ground outside of the at least one of the ring-shaped tanks and outside of the scrubber tower, and connected by means of an inlet pipe (36) to a connector (17) on the at least one of the ring-shaped tanks. ### Claim 6 (depends on 1) The scrubber according to claim 1, wherein the feed pipes for feeding the scrubber fluid to the spray beams is located inside an outer surface (5) of the scrubber tower. ### Claim 7 (depends on 2) The scrubber according to claim 2, wherein the feed pipes for feeding the scrubber fluid to the spray beams is located inside an outer surface (5) of the scrubber tower. ### Claim 8 (depends on 3) The scrubber according to claim 3, wherein the feed pipes for feeding the scrubber fluid to the spray beams is located inside an outer surface (5) of the scrubber tower. ### Claim 9 (depends on 4) The scrubber according to claim 4, wherein the feed pipes for feeding the scrubber fluid to the spray beams is located inside an outer surface (5) of the scrubber tower. ### Claim 10 (depends on 5) The scrubber according to claim 5, wherein the feed pipes for feeding the scrubber fluid to the spray beams is located inside an outer surface (5) of the scrubber tower.