Method and apparatus for recovery of energy from blast furnace exhaust gas

Patent · Tue Jun 02 04:00:00 EDT 1981

OSTI ID:5980129

Shirato, T

The present invention relates to a method and apparatus for recovering energy from a blast furnace exhaust gas by utilizing an axial-flow turbine. According to the method of the present invention, a blast furnace exhaust gas is first passed through a wet scrubber to remove dusts and form a saturated gas, and low temperature water is sprayed to the saturated gas to add condensed mists to the gas. According to this method, adhesion of dusts to a turbine can be effectively prevented. When large nozzles and large moving blades are used for the turbine for use in practising this method, adhesion of dusts and erosion of nozzles and moving blades can be effectively prevented. This energy recovery method can be practised very advantageously by using an axial-flow turbine in which the gas flow-out direction at the nozzle outlet is made in agreement with the gas flow-out direction at the moving blade outlet to always impart to the gas a swirling speed around the axial center of the turbine, so that the dusts and mists are shaken off from the gas.

• Assignee: Mitsui Shipbuilding and Eng Co Ltd (Japan)
• Patent Number(s): US 4270343
• OSTI ID: 5980129
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320304 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Waste Heat Recovery & Utilization
320305* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
BLAST FURNACES
DUSTS
ENERGY RECOVERY
FLOW RATE
FLUE GAS
FLUID FLOW
FLUIDS
FURNACES
GAS FLOW
GAS TURBINES
GASEOUS WASTES
GASES
MACHINERY
RECOVERY
TURBINES
TURBOMACHINERY
VAPORS
WASTES
WATER VAPOR