Tank flushing delay arrangement for a steam generator

Details Tank flushing delay arrangement for a steam generator Tank flushing delay arrangement for a steam generator

1978-08-17

1981-09-01

Bartis, A.

Electric heating

Heating devices

Resistive element: igniter type

122379, 122382, 122396, 219295, 219327, 219332, 219333, H05B 102, F22B 128, F22B 3750

Patent

active

042874076

ABSTRACT:
A steam generator includes a tank with a water inlet valve, a steam outlet, an electric immersion heater in said tank, and a normally closed drain valve. A water level control, connected to the inlet valve and the heater, is arranged to apply power to the heater only when it is immersed, and to admit make up water into the tank as steam is used. A drain valve control is connected to said drain valve and operates to open the drain valve to flush the tank only upon starting the generator after completion of a generator cooling period sufficient to condense residual steam in the tank which follows shut down of the generator. The completion of such a cooling period is sensed by either a pressure sensitive or a temperature sensitive switch which responds to conditions in the generator. The switch is connected to the drain valve control to prevent opening of that valve should the generator not be cooled to ambient temperature.

REFERENCES:
patent: 2790890 (1957-04-01), Kasuga
patent: 3025381 (1962-03-01), Pickering
patent: 3077530 (1963-02-01), Chase et al.
patent: 3082312 (1963-03-01), Shaw
patent: 3291964 (1966-12-01), Williams
patent: 3660635 (1972-05-01), Liebert
patent: 3761679 (1973-09-01), Dall
patent: 4107511 (1978-08-01), Shulz et al.

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