Method and apparatus for improved start-up procedures in conventional steam power generators and dual fluid cheng cycle engines
AssigneeInternational Power Technology, Inc.
InventorsJames Hamill, Ramarao Digumarthi, William Conlon, Dah Y. Cheng, Chung-Nan Chang
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Abstract
An improved procedure for cold start-up of closed loop boiler set and Cheng cycle system wherein the venting step, the boiler swelling problem and blowdown step of the conventional start-up are eliminated by use of an external pressure source to increase the operating pressure in the evaporator section which minimizes premature phase change and accompanying volume increase.
Claims6
An improved start-up procedure for a steam producing boiler, which boiler comprises, in part, an economizer section, an evaporator section, a superheater section and a water storage drum located between and connected to said evaporator and superheater sections and wherein said improved start-up procedure comprises the steps of:
- (a) increasing the pressure in said drum by providing an external pressure source to the drum, said increased drum pressure substantially greater than atmospheric pressure;
- (b) applying heat to said evaporator and superheater sections;
- (c) maintaining said drum in communication with said external pressure source as the liquid temperature in said drum approaches its normal operating temperatures, and;
- (d) obtaining steady state operation of said boiler, producing steam of desired quality for subsequent process steps.
Dependencies are inferred from the claim text.