Furnaces – Fuel feeders – Feeder responsive to fuel bed height
Patent
1992-07-14
1994-02-15
Yuen, Henry C.
Furnaces
Fuel feeders
Feeder responsive to fuel bed height
110101CC, 110101CF, 110106, 406 24, 222368, F23K 302
Patent
active
052857352
ABSTRACT:
An apparatus for controlling the injection quantity of pulverized coal by measuring the flow rate of the pulverized coal in a conveying pipe, through which the pulverized coal is injected into tuyeres of a blast furnace, in order to regulate the opening of a valve installed between a feed tank and the conveying pipe based on the measured flow rate, and also by regulating the internal pressure of the feed tank so as to maintain the difference in the internal pressure between the feed tank and the conveying pipe within a predetermined range. The thus configured apparatus provides rapid-response and high-accuracy in control, wide-range controllability, and allows to control the injection quantity of the pulverized coal even when supplying the pulverized coal to the feed tank.
REFERENCES:
patent: 4238058 (1980-12-01), Heth
patent: 4389949 (1983-06-01), Heep
patent: 4430963 (1984-02-01), Finet
patent: 4605036 (1986-08-01), Smith et al.
patent: 4758118 (1988-07-01), Rachner et al.
"An Introduction To Blast Furnace Coal Injection" I. F. Carmichael & Davy McKee Corporation dated Mar. 1992.
Motoi Yasunori
Numazawa Makoto
Ohtaka Matsuo
Diamond Engineering Co., Ltd.
Sumitomo Metal Industries Ltd.
Yuen Henry C.
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