Combustion unit

Liquid heaters and vaporizers – Miscellaneous

Patent

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Details

110245, 16510416, 422145, 422146, F22B 100

Patent

active

052692620

ABSTRACT:
The invention relates to a combustion unit, which for effecting a circulating mass process comprises a reactor chamber, whose lower part is, for formation of a fluidized bed, fitted with a grate structure (10), at least one particle separator with means for purifying the combustion gas containing solid material, formed in the fluidized bed, from said solid material, and a return duct (6a) for returning the solid material particularly to the fluidized bed. A gas lock structure (KL) as an extension of the return duct (6a) prevents the gas flow to the opposite direction and comprises a combination formed by a closed bottom structure (14), a cover structure (11) placed above the bottom structure (14) and having openings (12a), an interspace (13) formed between the bottom structure (14) and the cover structure (11), and openings (15a) placed in the wall of the return duct (6a) between the bottom structure (14) and the cover structure (11), as seen in vertical direction, and connected with the interspace ( 13). The solid material moves from the return duct (6a) through the openings (12a) of the cover structure (11) to the interspace (13) and exits from the interspace (13) to the fluidized bed above the grate structure (10) through the openings (15a) of the return duct (6a).

REFERENCES:
patent: 5003931 (1991-04-01), Huschauer
patent: 5140950 (1992-08-01), Abdulally

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