Method and plant for recovering heat from smoke gases

Patent · Tue Jul 12 04:00:00 EDT 1983

OSTI ID:5417192

Tieberg, L A; Carlqvist, S G

A method and plant are disclosed for recovering heat from smoke gases in combustion plants, whereat the combustion air is compressed prior to being supplied to the combustion chamber of the plant. The compressed smoke gases from the combustion chamber are cooled, at a pressure which exceeds 1.5 atmospheres, to a temperature beneath 100/sup 0/ C., preferably beneath 80/sup 0/ C., and are then caused to expand in a turbine, whereat the energy released by said expansion is utilized for compressing the air of combustion. The plant comprises one or more compressors which are arranged upstream of the combustion chamber of the combustion plant and which compress the air of combustion; and a turbine arranged downstream of the combustion chamber or chambers for expanding the compressed smoke gases. The turbine is mechanically connected to an associated compressor so that the kinetic energy developed by the turbine through expansion of the smoke-gases is utilized in the compressor for compressing the air of combustion. Connected between the last combustion chamber in the system and the turbine is a smoke-gas cooler which works at a smoke-gas pressure exceeding 1.5 atmospheres and in which the smoke gases are cooled to a temperature which is lower than 100/sup 0/ C., preferably lower than 80/sup 0/ C.

• Assignee: EDB-84-022308
• Patent Number(s): US 4392809
• OSTI ID: 5417192
• 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
AEROSOLS
COLLOIDS
COMBUSTION CHAMBERS
COMPRESSION
DISPERSIONS
ENERGY RECOVERY
GASEOUS WASTES
HEAT RECOVERY
MACHINERY
RECOVERY
RESIDUES
SMOKES
SOLS
TURBINES
TURBOMACHINERY
WASTE HEAT UTILIZATION
WASTE PRODUCT UTILIZATION
WASTES