Inline scrubber with dual water system
AssigneeWäRtsilä Moss AS
InventorsJan Gunnar Gannefors, Per Clausen
Life of this patent
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Abstract
A method for dual water scrubbing and an in-line dual water scrubber for gas cleaning onboard a vessel are disclosed. The in-line dual water scrubber includes a vertical extended body, a gas inlet, and a gas outlet. The gas inlet is underlying in the lower section of the extended body and the gas outlet is overlying in the upper section of the extended body. A first underlying scrubbing section, and a second scrubbing section in an upper section of the extended body are provided. One or more liquid collectors are arranged above one or more first scrubbing liquid sprayers. The liquid collector is arranged for collecting one or more second scrubbing liquid and for flow through of a vertical upwards flowing gas-flow from the inlet to the outlet.
Claims12
A marine vessel exhaust in-line dual water scrubber, comprising:
- a vertically extending body;
- an exhaust gas inlet from a diesel or oil driven motor in said marine vessel;
- and
- a cleaned gas atmospheric outlet,
- wherein said exhaust gas inlet is underlying in a lower section of said vertically extending body and said cleaned gas outlet is overlying in an upper section of said vertically extending body,
- wherein said exhaust gas inlet comprises a water trap with an outlet arranged between said exhaust gas inlet and one or more first scrubbing liquid sprayers, wherein said water trap is arranged to prevent liquid flowing into said exhaust gas inlet;
- said scrubber further comprising:
- a first underlying scrubbing section comprising:
- one or more first circuit liquid inlet;
- said one or more first scrubbing liquid sprayers;
- and
- one or more first circuit liquid outlets, for a first scrubbing liquid,
- a second scrubbing section in said upper section of said vertically extending body, comprising:
- one or more second circuit liquid inlets;
- one or more second scrubbing liquid sprayers;
- and
- one or more second circuit liquid outlets, for a second scrubbing liquid,
- wherein said first scrubbing liquid is connected to a first scrubbing liquid handling system and said second scrubbing liquid is connected to a second scrubbing liquid handling system, said first and second liquid handling systems being outside said vertically extending scrubber body,
- wherein said second liquid handling system has a chemical adding equipment,
- wherein said first and second liquid handling systems are arranged with first switches connected to said first circuit liquid inlets and said first circuit liquid outlets, and second switches connected to said second circuit liquid inlets and said second circuit liquid outlets, and are arranged for separate handling of said first and second scrubbing liquids either both in closed loops, or in a closed loop and in an open loop wherein said first scrubbing liquid is sea water taken from the sea, used in the scrubber for scrubbing the gas and then discharged to the sea, or both in open loops wherein said first and said second scrubbing liquid is sea water taken from the sea, used in the scrubber for scrubbing the gas and then discharged to the sea;
- wherein one or more liquid collectors are arranged above said one or more first scrubbing liquid sprayers,
- wherein said one or more liquid collectors are arranged in fluid connection with said second circuit liquid outlets for collecting one or more said one or more second scrubbing liquid for preventing said second scrubbing liquid from mixing up with said first scrubbing liquid in order to treat said first and second scrubbing liquids differently outside the vertically extending scrubber body, and for flow through of a vertically upwards flowing exhaust gas-flow from said exhaust gas inlet to said cleaned gas outlet,
- said one or more liquid collectors comprising liquid collector means and exhaust gas flow passages arranged at each appurtenant level in said vertically extending body,
- wherein said liquid collector means at a level is horizontally displaced relative to the first liquid collector means at a below level, overlaying said exhaust gas flow passages of the liquid collector means of the below level,
- wherein said liquid collector means comprises one or more ducts in each level arranged in parallel with gas flow passages between said ducts, and is further arranged to cover a full cross section of said vertically extending body allowing a vertically upwards flowing gas flow through said scrubber from said exhaust gas inlet to said cleaned gas outlet and collecting/retaining said second scrubbing liquid into said second circuit liquid outlets, preventing said second scrubbing liquid mixing into said first scrubbing liquid.
Dependencies are inferred from the claim text.