Title: Mixed-flow feedwater heater having a regulating device

Abstract: A mixed-flow feedwater heater having a regulating device is disclosed including a feedwater tank having a deaerating dome. Steam is conveyed from a low pressure steam drum to a feedwater tank to heat and deaerate the feedwater. Feedwater is supplied from the feedwater tank either to the low pressure steam drum or to an evaporator. The water level in the low pressure steam drum is regulated to a desired level. The feedwater tank is connected to the steam drum by a steam pipe having a pressure-regulating valve which is subjected to the pressure in the mixed flow feedwater tank. The valve controls the pressure in the feedwater tank so that the pressure does not exceed a pre-determined value.

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Inventors: Kehlhofer, Rolf (Dielstorf, CH)

Application Number: 906828
Filing Date: 1978-05-17
Publication_date: 1980-06-17
Assignee: BBC Brown, Boveri & Co. (Baden, CH)
Primary Class(es): 122/406.4 60/39.182, 122/441, 122/451R
Other Classes:
US Patent Ref:

3769795	Nov, 1973	Rostrom	122/7.
3955358	May, 1976	Martz et al.	60/39.
3965675	Jun, 1976	Martz et al.	122/406.

Other Refs:
Primary Examiner: Favors, Edward G.
Assistant Examiner:
Attorney: Burns, Doane, Swecker & Mathis