초록 ▼

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 disch

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.

대표청구항 ▼

A method of recovering heat energy of hot raw gas generated in a coal gasification arrangement of an electric energy generating plant having a heat exchanging and dust separating unit equipped with a waste-heat recovery boiler and a raw gas purified gas heat exchanger, a raw gas desulfurization unit

A method of recovering heat energy of hot raw gas generated in a coal gasification arrangement of an electric energy generating plant having a heat exchanging and dust separating unit equipped with a waste-heat recovery boiler and a raw gas purified gas heat exchanger, a raw gas desulfurization unit, and an electric power generating unit equipped with combined gas- and steam turbines, comprising the steps of arranging heat exchange surfaces of said waste-heat recovery boiler and said raw gas/purified gas heat exchanger side by side in a feeding path for said hot raw gas in said heat exchanging and dust separating unit; feeding a stream of said hot raw gas via said feeding path of the heat exchanging and dust separating unit into said desulfurization unit to generate cool purified gas; feeding water through said waste heat recovery boiler and feeding said cool purified gas through said raw gas/purified gas heat exchanger to simultaneously transfer heat energy from said stream of hot raw gas both to said water to generate superheated steam for said steam engine, and to said cool purified gas to generate heated purified gas for said gas turbine.