High pressure and high temperature ash discharge system

Details High pressure and high temperature ash discharge system High pressure and high temperature ash discharge system

1987-09-08

1988-12-13

Warner, Steven E.

Furnaces

Ash receiving and handling devices

Fly ash disposers

110259, 110266, 414218, 414221, F23J 100

Patent

active

047902515

ABSTRACT:
A system for discharging and cooling hot ash from a coal combustion unit, such as a coal combustor or an associated filter, where the hot ash at a temperature in excess of 700.degree. C. and at superatmospheric pressure is charged to a jacketed, cooled screw conveyor and passed therethrough in contact with a countercurrent flow of a purge gas. The ash is cooled in the screw conveyor to a temperature of below 320.degree. C. and dischaged to a collection hopper, under pressure, while the purge gas and gases evolved from the hot ash are returned to the combustion unit.

REFERENCES:
patent: 2985324 (1961-05-01), Balentine
patent: 3302598 (1967-02-01), Godel
patent: 3729105 (1973-04-01), Huebler et al.
patent: 4401402 (1983-08-01), Casperson
patent: 4419965 (1983-12-01), Garcia-Mallol et al.
patent: 4700636 (1987-10-01), Vogt et al.
"Hot Hot Gas Cleaning Improves the Economics of Electricity-from-Coal", G. P. Reed, Filtration and Separation, pp. 120-124, Mar./Apr. 1984.

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