Furnaces – Combined – With boiler
Patent
1991-03-05
1992-03-17
Favors, Edward G.
Furnaces
Combined
With boiler
110232, 110347, F23B 700
Patent
active
050958275
ABSTRACT:
Apparatus for preparing in a circulating fluid bed boiler fuel material that is fed to the boiler with a moisture content that is normally high enough to plug grinding apparatus needed to grind the fuel material to a particulate size for combustion, operating the boiler and grinding apparatus in cooperation so that heat energy at a high temperature is borrowed from the boiler for drying the fuel material at the grinding apparatus and returning the heat energy in the form of steam so there is no net loss of heat energy. The system provides that hot gases discharged from the boiler are fed into the grinding apparatus for drying the incoming moisture containing fuel material before it is conveyed to the boiler as a fuel, and controlling the boiler and grinding apparatus, with or without sorbent, so that the boiler fuel demand is independent of the quantity of fuel material in the grinding apparatus and the rate of grinding of the fuel material is maintained at a predetermined pressure differential in the grinding apparatus.
REFERENCES:
patent: 4640204 (1987-02-01), Williams
patent: 4831942 (1989-05-01), Morimoto et al.
patent: 4998485 (1991-03-01), Williams
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