Process to eliminate production of fly ash by wet bottom boilers
This patent describes a process for the reduction of fly ash in a wet bottom boiler of the type having a primary and secondary furnace. It comprises collecting the fly ash from one of an electrostatic precipitator, a bag house, a cyclone collector, a multi- cyclone collector, a gravity separator and a sharply curved duct; removing the fly ash in a stream of carrier gas into the furnace; adding a fuel to the stream of carrier gas and fly ash; introducing the carrier gas and fly ash and fuel into one of the primary and secondary furnaces, wherein the fuel and the heat from at least one of the surrounding gas and molten slag provide energy to melt the fly ash; and discharging the melted fly ash with slag from the furnace bottom.
- Assignee:
- Consolidated Natural Gas Service Co., Inc., Pittsburgh, PA (United States)
- Patent Number(s):
- US 5044286; A
- Application Number:
- PPN: US 7-447789
- OSTI ID:
- 5804164
- Country of Publication:
- United States
- Language:
- English
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200200 -- Fossil-Fueled Power Plants-- Waste Management
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
AEROSOL WASTES
AIR POLLUTION CONTROL
ASHES
BAGHOUSES
BOILERS
CIRCULATING SYSTEMS
COMBUSTION PRODUCTS
CONCENTRATORS
CONTROL
CYCLONE SEPARATORS
ELECTROSTATIC PRECIPITATORS
EQUIPMENT
FLY ASH
FURNACES
INERTIAL SEPARATORS
MELTING
PHASE TRANSFORMATIONS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
RESIDUES
SEPARATION EQUIPMENT
WASTES