Fluid bed combustion reheat steam temperature control

Details Fluid bed combustion reheat steam temperature control Fluid bed combustion reheat steam temperature control

1992-06-01

1993-05-11

Favors, Edward G.

Liquid heaters and vaporizers

Feeders

Automatic

122451S, 122466, 122477, F22D 526

Patent

active

052091880

ABSTRACT:
A reheat steam temperature control system that utilizes the separate components of a reheater and a reheat heat exchanger to generate hot reheat steam. The reheater uses the fluidized bed as its source of heat while the reheat heat exchanger uses main steam as its source of heat. A bypass control valve is operated to divert the required amount of main steam to the reheat heat exchanger depending on operating conditions. Should the temperature of the hot reheat steam be too low, additional main steam is delivered to the reheat heat exchanger. Conversely, should the temperature of the hot reheat steam be too high, the amount of main steam delivered to the reheat heat exchanger is reduced. Attemperators are used within both the reheating circuit and the main steam circuit to temper the fluctuations of their respective steam.

REFERENCES:
patent: 3937024 (1976-02-01), Durrant et al.
patent: 4144846 (1979-03-01), Miszak
patent: 5056468 (1991-10-01), Wittchow et al.

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