F - Mech Eng,Light,Heat,Weapons – 02 – C
Patent
F - Mech Eng,Light,Heat,Weapons
02
C
F02C 3/22 (2006.01) C21B 13/14 (2006.01) F25J 3/04 (2006.01)
Patent
CA 2062589
ABSTRACT AIR SEPARTION Air is taken from the air compressor 4 of a gas turbine 2 including in addition to the compressor 4 a combustion chamber 6 and an expansion turbine 8. The gas turbine 2 drives an alternator 10. The air taken from the compressor 4 is cooled in heat exchanger 12 to remove heat of compression therefrom. The air is separated in an air separation plant 14 into oxygen and nitrogen. A stream of oxygen is withdrawn from the plant 14 and used in a blast furnace 20 in which iron is made. The off-gas from the blast furnace 20 is a low grade gaseous fuel. It is compressed in compressor 24 which has interstage cooling to remove at least some of the heat of compression. The compressed fuel gas is passed through the heat exchanger 12 countercurrently to the air stream. The resulting pre-heated fuel gas flows into the combustion chamber 6 of the gas turbine 2 and is burned therein to generate gaseous combustion products that are expanded in the turbine 8. A nitrogen stream is withdrawn in the air separation plant 14. A part of the nitrogen stream is introduced into the combustion chamber 6 and is expanded with the aforesaid gaseous combustion products, while another part is expanded in a separate expansion turbine 34.
Gowling Lafleur Henderson Llp
The Boc Group Plc
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