Method of and device for recovering heat energy of hot raw gas g

Power plants – Combustion products used as motive fluid

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64 3912, 122 7R, 48 67, F02C 328

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active

048256382

ABSTRACT:
In an electric energy generating plant including a coal gasification arrangement and a combined gas turbine and steam combine, hot raw gas generated in the gasification arrangement is fed via a heat-exchanging and dust separating unit into a desulfurization unit from which cool purified gas is discharged. The heat exchanging unit includes a tubular pressure resistant housing serving as a feeding passage for the hot raw gas and enclosing a coaxial arrangement of a tubular pipe-wall housing of a waste-heat recovery boiler, and pipe spirals of a raw gas/purified gas heat exchanger. The waste-heat recovery boiler delivers superheated steam to the steam turbine and the raw gas/purified gas heat exchanger delivers heated purified gas to the gas turbine.

REFERENCES:
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patent: 4261166 (1981-04-01), Mayrhofer
patent: 4261167 (1981-04-01), Paull et al.
patent: 4478606 (1984-10-01), Dorling et al.
patent: 4488513 (1984-12-01), Jahnke et al.
patent: 4697415 (1987-10-01), Schiffers
patent: 4707163 (1987-11-01), Gudymov et al.
patent: 4768470 (1988-09-01), Ziegler

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