Process for drying and preheating coal utilizing heat in dry cooling or quenching of coke

Patent · Tue Oct 19 04:00:00 EDT 1982

OSTI ID:6701216

Dungs, H; Lorenz, K; Weber, H

A three-cycle process as disclosed for drying and preheating coking coal using the heat from cooled coke. Cooling gas is passed over hot coke to heat the cooling gas and cool the coke. The heated cooling gas is then passed through a waste heat boiler and then back to the hot coke in a coke cooling chamber. This completes the first closed cycle. Water is supplied to the waste heat boiler to form steam. The steam is supplied to a fluidized bed of wet coal to indirectly preheat and dry the wet coal in a second cycle. The wet coal is fluidized using fluidizing gas which converts water in the wet coal into steam. Some of the steam is condensed from the combination of fluidizing gas plus steam and then the fluidizing gas is returned to the bed. Steam from the waste heat boiler is also supplied to the fluidizing gas before it re-enters the bed to heat the fluidizing gas.

• Assignee: Still, Carl Firma (Germany, Federal Republic Of)
• Patent Number(s): US 4354903
• OSTI ID: 6701216
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010401 -- Coal & Coal Products-- Carbonization-- (-1987)
010800* -- Coal
Lignite
& Peat-- Waste Management
BOILERS
CARBONACEOUS MATERIALS
COAL
COKE
COOLING
DRYING
ENERGY
ENERGY RECOVERY
ENERGY SOURCES
ENERGY TRANSFER
FLUIDIZED BED
FOSSIL FUELS
FUELS
HEAT
HEAT RECOVERY
HEAT TRANSFER
MATERIALS
PROCESS HEAT
RECOVERY
RECYCLING
STEAM
STEAM GENERATION
WASTE HEAT UTILIZATION
WASTE PRODUCT UTILIZATION