Apparatus for cleaning blast-furnace exhaust gases

Details Apparatus for cleaning blast-furnace exhaust gases Apparatus for cleaning blast-furnace exhaust gases

1976-05-21

1977-10-04

Lutter, Frank W.

Metallurgical apparatus

With control means responsive to sensed condition

With pressure sensor

266159, 55 21, 55213, 55226, 55385D, 261DIG56, C21B 722

Patent

active

040520420

ABSTRACT:
An apparatus for cleaning the exhaust gas of a high-pressure blast furnace comprises a coarse-particle separator, a prewasher and a differential-pressure annular gap washer traversed in succession by the gases. The exhaust gases can be passed through a main duct provided with an expansion turbine or through a bypass duct around the expansion turbine. The expansion turbine unit controls the back pressure at the blast furnace while a separate control circuit is provided to operate the differential-pressure washer with optimum efficiency. A quick-closing valve in the turbine-supply line and a quick-opening valve in the bypass line permits rapid switchover, a pressure-control valve in the bypass line maintains a constant backpressure at the blast furnace when the expansion turbine unit is shut down.

REFERENCES:
patent: 3041059 (1962-06-01), Powell
patent: 3045996 (1962-07-01), Rice
patent: 3726065 (1973-04-01), Hausberg et al.
patent: 3820307 (1974-06-01), Hausberg et al.
patent: 3854300 (1974-12-01), Cerhold
patent: 3976454 (1976-08-01), Hausberg et al.

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