Patent GB-1320254-A (GB)
Title: Open-cycle gas turbine plant
IPC: F02C3/30
Filed: 1971-04-19
Abstract: 1320254 Gas turbine plant; turbine power plant METALLGESELLSCHAFT AG 19 April 1971 [7 Feb 1970] 20514/71 Headings F1G and F1Q In Fig. 1 combustible gas under pressure produced for example from a fossil fuel, is passed through line 1 to a scrubber 2 into which water is injected, the cleaned gas passing through line 7 to a saturator 8 into which water is sprayed, the saturated gas passing through line 18 to a combustion chamber 19 to which air under pressure is also supplied through line 27, the resulting combustion gases discharging through line 32 to drive turbine 31 which in turn drives electric generator 33 and compressor 21. The exhaust gases from the turbine discharge through duct 34 to a duct 12 in which are disposed water heating coils 17, 11, 25. Inflowing water is heated in coil 17, then further heated in coil 11, further heated in coil 14 disposed within combustion chamber 19, then passed to the saturator 8. Some water from the saturator is returned through line 10 to the heating coil 11 and some is passed through line 9 to the scrubber 2, water from the scrubber passing to a separator 4 and returning to the scrubber through line 6. The air compressor 21 takes in air at 20 and discharges it at 22 to a saturator 23, the saturated air passing in part through line 27 to the combustion chamber 19 and in part to a heating coil 29 in the combustion chamber, the heated air passing through line 30 to the gas producer. In Fig. 2(a) the scrubber 102 and saturator 108 are similar to the parts in Fig.1. A steam generator coil 127 is disposed in the combustion chamber 119 and steam therefrom passes through line 128 to a steam turbine 129 which drives a generator 137. Steam discharging from the turbine is condensed in condenser 131 and passed to heating coils 134, 135 disposed in the gas turbine exhaust duct 112, before returning through line 136 to the steam generator. Make-up water is supplied through line 133. Steam may be bled from the turbine 129 through line 130 and passed to the gas producer. In Fig. 2(b) (not shown), the steam generator 227 is disposed in the exhaust gas duct 212 and not within the combustion chamber 127; a steam super-heater 236 is disposed within the combustion chamber 219, also a water heater 211. In Fig. 3 the combustible gas passes through line 301 to a scrubber 302 in which the gas is scrubbed and saturated,the gas passing through line 308 into a mist producer and separator 309 into which cold water is injected through line 310. The gas then passes through line 311 to a saturator 312 into which water heated in heater 314 is passed through line 313, also water heated in heater 317 is passed through line 316. The combustible gas then passes through line 318 and is pre-heated in heater 319 and then passed to an expansion turbine 320 which drives a generator 340 also a compressor 337, the gas then passing to the combustion chamber 321. A steam generating coil 322 is located in the combustion chamber, the steam passing to steam turbine 323. The steam condensate is pre-heated at 327, degasified at 328 and further heated at 329 before passing to the steam generator 322. The gas turbine 331 drives a generator 333 also an air compressor 334, the air from the compressor being saturated at 335 before passing in part to the combustion chamber; the remaining part of the air passes to the compressor 337 for further compression and then passes to the gas producer through line 338.