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US 7,744,663 B2Granted
Methods and systems for advanced gasifier solids removal
AssigneeGeneral Electric Company
InventorPaul Steven Wallace
Life of this patent
Estimating the term…
Abstract
Methods and systems for a gasifier solids removal system are provided. The system includes a down flow combustor including an inlet and an outlet and a combustion zone extending therebetween, the combustor configured to direct a flow of process material including syngas, flowable slag, and particulates in a first downward direction, a plurality of flow passages in serial flow communication including a first flow passage and a second flow passage, wherein the process material flow reverses direction flowing from the first passage to the second passage, and a plurality of entrainment separation stages in serial flow communication with at least one of the plurality of flow passages.
Claims13
A gasifier comprising:
- a shell comprising a gas output passage defined through a lower portion of said shell;
- a down flow combustor defined within said shell, said combustor comprising an inlet, an outlet, and a combustion zone extending between said inlet and said outlet, said combustor configured to direct a flow of process material comprising syngas, flowable slag, and particulates in a downward direction;
- a plurality of annular flow passages in serial flow communication and positioned substantially concentrically about said combustor, said plurality of passages comprising a first flow passage and a second flow passage, said first and second flow passages positioned in series between said combustor and said shell along a radius of said shell, wherein the process material flows in an upward direction through the first passage into the second passage;
- an up-flow passage defined at least partially between said shell and an outer wall of said second flow passage and oriented such that the process material flows in a downward direction through the second passage and into the up-flow passage;
- and
- a plurality of entrainment separation stages in serial flow communication with at least the second flow passage, at least one of said plurality of entrainment separation stages is positioned within said up-flow passage, at least one stage of said plurality of entrainment separation stages comprising a water trough at least partially circumscribing said shell between said second passage and said up-flow passage, said water trough having a bottom formed of a perforated plate and configured to maintain a level of water above said bottom, wherein substantially all the flow of process material from said second passage flows through perforations in said bottom and said level of water.
3 more elements
A gasification system comprising:
- a pressure vessel comprising an outlet passage at a bottom portion of said pressure vessel;
- a combustor within said pressure vessel, said combustor configured to direct products of combustion to said outlet passage;
- and
- a fuel injection system configured to inject a fuel into said combustor;
- wherein said pressure vessel further comprises:
- a plurality of annular flow passages in serial flow communication and positioned substantially concentrically about said combustor, said plurality of passages comprising a first flow passage and a second flow passage, said first and second flow passages coupled in series between said combustor and said pressure vessel along a radius of said pressure vessel, wherein process materials flow in an upward direction through said first passage and into said second passage;
- a sump positioned proximate the outlet passage;
- a lockhopper adjacent said sump, said lockhopper configured to transfer solid combustion products from said combustor to an exterior of said pressure vessel;
- and
- an up-flow passage defined at least partially between a wall of said pressure vessel and an outer wall of said second flow passage, said up-flow passage oriented such that process materials are discharged downwardly direction through the second passage and into the up-flow passage, said up-flow passage comprising a multi-stage entrainment separator positioned within said up-flow passage, at least one stage of said plurality of entrainment separation stages comprising a water trough at least partially circumscribing said shell between said second passage and said up-flow passage, said water trough having a bottom formed of a perforated plate and configured to maintain a level of water above said bottom, wherein substantially all the flow of process material from said second passage flows through perforations in said bottom and said level of water.
7 more elements
Dependencies are inferred from the claim text.