Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
258 words
A combined gas turbine/steam turbine plant, wherein the waste gas line (5) of the gas turbine unit (which gas turbine unit comprises air compressor (2), combustor (4), gas turbine (1) and generator (3)) is connected to the primary side of a steam generator (6) which in turn is part of a steam turbine unit (which steam turbine unit comprises in addition a high-pressure (7) and low-pressure turbine (8), a condenser (10), a feed-water reservoir (11) and a feed-water pump (12)) and wherein the combustor (4) of the gas turbine unit is connected to the outlet of a coal gasification plant including an air-separation unit (17) having an outlet for the separated nitrogen and including a gasifier (15) downstream of which are connected a steam generator (19) for utilizing the crude gas heat and a heat exchanger (21) for heating the purified gas through the crude gas, the steam generator (19), which is upstream of the crude gas/purified gas heat exchanger (21), being a high-pressure steam generator whose secondary-side outlet (31) is connected to the outlet of the steam generator (6) of the steam turbine unit, characterised in that a low-pressure steam generator (22), the secondary-side outlet (32) of which is connected to the low-pressure part (8) of the steam turbine, is connected to the crude gas/purified gas heat exchanger (21), downstream thereof, and that the nitrogen outlet of the air-separation unit (17) of the coal gasification plant is connected exclusively to the purified gas line leading to the combustor (4) or to the burners in the combustor (4).
Claim 2
Dependent Claim
258 words
A combined gas turbine/steam turbine plant, wherein the waste gas line (5) of the gas turbine unit (which gas turbine unit comprises air compressor (2), combustor (4), gas turbine (1) and generator (3)) is connected to the primary side of a steam generator (6) which in turn is part of a steam turbine unit (which steam turbine unit comprises in addition a high-pressure (7) and low-pressure turbine (8), a condenser (10), a feed-water reservoir (11) and a feed-water pump (12)) and wherein the combustor (4) of the gas turbine unit is connected to the outlet of a coal gasification plant including an air-separation unit (17) having an outlet for the separated nitrogen and including a gasifier (15) downstream of which are connected a steam generator (19) for utilizing the crude gas heat and a heat exchanger (21) for heating the purified gas through the crude gas, the steam generator (19), which is upstream of the crude gas/purified gas heat exchanger (21), being a high-pressure steam generator whose secondary-side outlet (31) is connected to the outlet of the steam generator (6) of the steam turbine unit, characterised in that a low-pressure steam generator (22), the secondary-side outlet (32) of which is connected to the low-pressure part (8) of the steam turbine, is connected to the crude gas/purified gas heat exchanger (21), downstream thereof, and that the nitrogen outlet of the air-separation unit (17) of the coal gasification plant is connected exclusively to the purified gas line leading to the combustor (4) or to the burners in the combustor (4).
Claim 3
Dependent Claim
35 words
A plant according to claim 1, caracterised in that the oxygen outlet of the air-separation plant (17) is connected to a compressor (16) by way of an oxygen buffer store (34) which is under pressure.
Claim 4
Dependent Claim
37 words
A plant according to claim 1 or 2, characterised in that the nitrogen outlet of the air-separation plant (17) is connected to a compressor (30) by way of a nitrogen buffer store (35) which is under pressure.
Claim 5
Dependent Claim
54 words
A plant according to any one of claims 1 to 3, characterised in that a gas line (33), which is connected to the gas line in the cooling area of the gasifier (15) of the coal gasification plant, branches off from the high-pressure steam generator (31), on the primary side thereof and downstream thereof.