Feedwater preheat corrosion control system
An improved arrangement is described for preheating feedwater in a steam boiler system prior to the feedwater entering a fuel economizer in order to prevent corrosion due to condensation of flue gas in the fuel economizer and in the exhaust of the boiler system. The feedwater, prior to entering the fuel economizer, is heated in a preheater with a portion of steam from a boiler. The amount of steam entering the preheater is regulated by two temperature control valves. A first temperature control valve is regulated by the temperature of the feedwater prior to entering the fuel economizer. A second temperature control valve is regulated by the temperature of the flue gas in the boiler exhaust stack.
- Assignee:
- Tranter, Inc.
- Patent Number(s):
- US 4173949
- OSTI ID:
- 5477124
- Country of Publication:
- United States
- Language:
- English
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