Coal-fired steam generator

Details Coal-fired steam generator Coal-fired steam generator

1986-11-05

1988-04-26

Warner, Steven E.

Liquid heaters and vaporizers

Steam treatment

Water tube boiler

122480, F22G 714

Patent

active

047397292

ABSTRACT:
A coal-fired steam generator that has a water-steam circulation and a low pressure-heat carrier-circulation which, via a heater that is disposed in the flue gas flow of the steam generator and that has at least one heat transfer surface, absorbs heat from the flue gas flow and conveys this heat to a process that utilizes heat, especially a gas turbine process in conjunction with a coal-combination unit having a steam turbine connected in the water-steam circulation. To optimize the position of the heater for the low pressure-heat carrier-circulation, especially a sodium circulation, there are provided at least two flue gas passes that are connected in parallel with a combustion chamber of the steam generator, whereby the flue gas flow coming from the combustion chamber is distributed to these flue gas passes, at least one of which is associated with a water-steam circulation, while the other is associated with the low pressure-heat carrier-circulation.

REFERENCES:
patent: 2926636 (1960-03-01), Paulison, Jr.
patent: 2985153 (1961-05-01), Dickey
patent: 3105469 (1963-10-01), Fikenscher
patent: 3345795 (1967-10-01), Stevens et al.
patent: 3396705 (1968-08-01), Eickenberg
patent: 4515109 (1985-05-01), Jullien
VGB Kreftwerkstechnik, Von K. Knizia, Jun. 1985, pp. 545-557.

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