Coal-fired combined plant

Patent · Tue May 27 04:00:00 EDT 1986

OSTI ID:5481507

Ishihara, T

A coal-fired combined plant is described in which a finely powdered coal is carried to a combustion furnace by high-temperature and high-pressure air and is burned therein; the resultant combustion gas is delivered to a gas turbine, in order to generate electric power; by the utilization of the resultant exhaust gas, steam is produced; and electric power generation is carried out by a steam turbine with the aid of the produced steam, characterized in that high-temperature and high-pressure air and a finely powdered coal are introduced into coal ash-melting combustion furnaces, in which the finely powdered coal is burned at a high temperature to produce a combustion gas. Most of the resultant coal ash is removed in a molten state from the combustion gas to carry out a primary dust removal. A dust in the combustion gas is removed therefrom by a cyclone disposed in a pressurizing coal combustion furnace to carry a secondary dust removal; the removed dust is subjected to a heat exchange for secondary air in a dust cooler disposed on the lower portion of the pressurizing coal combustion furnace. A temperature of the combustion furnace gas at an outlet of the pressurizing coal combustion furnace is adjusted to a predetermined level by mixing the combustion gas with the secondary air; the dust in the combustion gas discharged through the outlet of the pressurizing coal combustion furnace is removed therefrom by a precision dust-removing device in order to carry out a tertiary dust removal. The combustion gas is then delivered to the gas turbine.

• Assignee: Mitsubushi Jukogyo Kabushiki Kaisha, Tokyo
• Patent Number(s): US 4590868
• OSTI ID: 5481507
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000 -- Coal
Lignite
& Peat-- Combustion
20 FOSSIL-FUELED POWER PLANTS
200105* -- Fossil-Fueled Power Plants-- Heat Utilization
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COAL FINES
COGENERATION
COMBUSTION
CONCENTRATORS
CONTROL
CYCLONE SEPARATORS
DESIGN
DEUS
DUAL-PURPOSE POWER PLANTS
DUST COLLECTORS
DUSTS
ENERGY SOURCES
ENERGY SYSTEMS
ENERGY TRANSFER
EQUIPMENT
EXHAUST GASES
FLUIDS
FOSSIL FUELS
FUELS
FURNACES
GAS TURBINES
GASEOUS WASTES
GASES
HEAT TRANSFER
INERTIAL SEPARATORS
MACHINERY
MATERIALS
MIXING
OPERATION
OXIDATION
POLLUTION CONTROL EQUIPMENT
POWER GENERATION
POWER PLANTS
PRESSURIZING
SEPARATION EQUIPMENT
STEAM GENERATION
TEMPERATURE CONTROL
THERMOCHEMICAL PROCESSES
TURBINES
TURBOMACHINERY
WASTES