Furnaces – Ash receiving and handling devices – Fly ash disposers
Patent
1990-11-07
1991-08-27
Favors, Edward G.
Furnaces
Ash receiving and handling devices
Fly ash disposers
110171, 110259, F23J 100
Patent
active
050423991
ABSTRACT:
A hearth arrangement for a furnace which melts refuses carried on the hearth arrangement comprises a plurality of hearth blocks arranged like a stair. The heart blocks are inclined stepwise in a refuse carrying direction and each hearth block has a width direction perpendicular to the refuse carrying direction. Each hearth block is divided into two block elements in the width direction of the hearth block and the two block elements are joined to each other by springs which exerts a biasing force on the block elements in the width direction of the hearth block. A clearance is formed between each two adjacent hearth blocks to tolerate heat expansion of the hearth blocks. Each block has a protuberance extending over a next hearth block located in the ash carrying direction such that the ash does not flow into the clearance between the hearth blocks. A convex portion is formed on a contacting plane of one block element and a concave portion is formed in a contacting plane of the other block element such that the convex portion engages with the concave portion to ensure a tight engagement of two block elements.
REFERENCES:
patent: 3741136 (1973-06-01), Stookey
patent: 4109590 (1978-08-01), Mansfield
patent: 4210087 (1980-07-01), Melan et al.
Hagihara Hitoshi
Inoue Satoshi
Motomura Takehiko
Favors Edward G.
Ishikawajima-Harima Heavy Industries Co. Ltd.
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