System using electric furnace exhaust gas to preheat scrap for steelmaking
Patent
·
OSTI ID:6042880
A method is described for clean preheating of scrap contaminated with oil and organic matter, for steelmaking, using heat from exhaust gas flow from an electric furnace. It consists of: burning any combustibles present in the exhaust gas flow and simultanously separating out dust particles from the exhaust gas flow; heating a predetermined amount of the scrap by heat exchange with a predetermined portion of the exhaust gas flow; removing and collecting dust from the exhaust gas flow after preheating of scrap thereby; sensing the temperature of the exhaust flow; scrubbing the exhaust gas flow with an aqueous solution of a deodorant solvent flowing at a rate regulated to be in a predetermined relationship related to the exhaust gas temperature sensed prior to scrubbing, thereby generating saturated vapor and reducing the temperature of the exhaust gas flow by a predetermined amount; and electrostatically precipitating out oil mist attached to saturated water vapor and liquid droplets in the exhaust gas flow.
- Assignee:
- Godo Steel, Ltd., Osaka
- Patent Number(s):
- US 4692113
- OSTI ID:
- 6042880
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320304* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Waste Heat Recovery & Utilization
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION CONTROL
ALLOYS
COMBUSTION PRODUCTS
CONTROL
DROPLETS
DUSTS
ELECTRIC FURNACES
ELEMENTS
ENERGY
ENERGY SOURCES
ENERGY TRANSFER
EXHAUST GASES
FLUID FLOW
FLUIDS
FOSSIL FUELS
FUELS
FURNACES
GAS FLOW
GASEOUS WASTES
GASES
HEAT
HEAT TRANSFER
HEATING
IRON ALLOYS
IRON BASE ALLOYS
METALS
ORGANIC MATTER
PARTICLES
PETROLEUM
POLLUTANTS
POLLUTION CONTROL
REMOVAL
SCRAP
SCRAP METALS
SCRUBBING
SOLID WASTES
STEELS
VAPORS
WASTE HEAT
WASTE HEAT UTILIZATION
WASTE PRODUCT UTILIZATION
WASTES
WATER VAPOR
320304* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Waste Heat Recovery & Utilization
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION CONTROL
ALLOYS
COMBUSTION PRODUCTS
CONTROL
DROPLETS
DUSTS
ELECTRIC FURNACES
ELEMENTS
ENERGY
ENERGY SOURCES
ENERGY TRANSFER
EXHAUST GASES
FLUID FLOW
FLUIDS
FOSSIL FUELS
FUELS
FURNACES
GAS FLOW
GASEOUS WASTES
GASES
HEAT
HEAT TRANSFER
HEATING
IRON ALLOYS
IRON BASE ALLOYS
METALS
ORGANIC MATTER
PARTICLES
PETROLEUM
POLLUTANTS
POLLUTION CONTROL
REMOVAL
SCRAP
SCRAP METALS
SCRUBBING
SOLID WASTES
STEELS
VAPORS
WASTE HEAT
WASTE HEAT UTILIZATION
WASTE PRODUCT UTILIZATION
WASTES
WATER VAPOR