Method and device for purging gas production furnace
AssigneeIHI Corporation
InventorsTomoyuki Katagiri, Hisanori Nukumi, Kenichiro Kondo
Life of this patent
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Abstract
A fluidized bed gasification furnace has a fluidized bed formed and a freeboard section F above a bed material so as to produce a produced gas by a reaction of raw material with a gasifying agent and take out the produced gas through the freeboard section. Upon shutdown of the furnace, inert gas is fed from below to the furnace for purging of gas in the fluidized bed with inert gas while steam is supplied to a freeboard section above the fluidized bed to purge a gas in the freeboard section with steam.
Claims8
A method for purging a gas production furnace, the furnace comprising a fluidized bed and a freeboard section above a bed material arranged so as to produce a produced gas by a reaction of raw material with a gasifying agent in the fluidized bed and take out the produced gas through the freeboard section,
- the method comprising, upon shutdown of the gas production furnace, supplying the gas production furnace with inert gas from below for purging gas in the bed material with the inert gas, and supplying the freeboard section above the bed material with steam for purging gas in the freeboard section with the steam.
A device for purging a gas production furnace, comprising:
- a fluidized bed and a freeboard section above a bed material arranged so as to produce a produced gas by a reaction of raw material with a gasifying agent in the fluidized bed and take out the produced gas through the freeboard section;
- an inert gas supply unit arranged to supply an inert gas to the bed material from below for purging of the bed material with the inert gas;
- and
- a steam supply unit arranged to supply steam to the freeboard section above the bed material for purging of a gas in the freeboard section.
Dependencies are inferred from the claim text.