System for recovering pressure and sensible heat from blast furnace gas with use of dry-type dust collector

Patent · Tue Aug 23 00:00:00 EDT 1983

OSTI ID:5582210

Tomita, Y; Oda, N; Wakabayashi, T; Yamamoto, H

A system is disclosed for recovering as power the pressure and sensible heat of the gas discharged from the top of a blast furnace by guiding the gas to a dry-type dust collector for the removal of dust while maintaining the gas at the furnace top pressure and introducing the gas into a turbine for expansion. To protect the dry-type dust collector when the gas is run off from the furnace at an abnormally high temperature, a gas channel extending from the furnace to the dust collector is provided with at least one injector, which injects a cooling fluid into the gas in response to a signal from a temperature detecting sensor disposed close to the gas outlet of the dust collector. The sensor which is positioned near the dust collector outlet detects the temperature without the time delay attributable to the deposition of dust. With use of the dry-type dust collector, the gas can be fed to the turbine almost without cooling for the recovery of an increased amount of power.

• Assignee: Hitachi Shipbuilding and Engineering Co. Ltd. (Japan)
• Patent Number(s): US 4400184
• OSTI ID: 5582210
• Resource Relation: Patent Priority Date: Priority date 18 May 1979, Japan; Other Information: PAT-APPL-346190
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
BLAST FURNACES
EXHAUST GASES
HEAT RECOVERY
DUST COLLECTORS
PRESSURIZING
TURBINES
WASTE HEAT UTILIZATION
ENERGY RECOVERY
FLUIDS
FURNACES
GASEOUS WASTES
GASES
MACHINERY
RECOVERY
TURBOMACHINERY
WASTE PRODUCT UTILIZATION
WASTES
320304* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Waste Heat Recovery & Utilization