Method and device for improving reliability of starting water level of heat recovery boiler of gas turbine power plant

Abstract

The present invention relates to a method and device for improving the reliability of the start-up water level of waste heat boilers in gas turbine power plants. The high water level alarm setting corresponding to the steam drum is divided into three working conditions, which are characterized in that: the high water level alarm of the second working condition is customized as follows: 1) The water level parameter of the high pressure steam drum at the start-up stage of the unit, the target water level is -300mm , the high alarm value is -100mm, and the high jump value is 200mm; 2) The water level parameters of the medium pressure steam drum at the start-up stage of the unit, the target water level is -150mm, the high alarm value is 0mm, and the high jump value is 200mm; 3) High and medium pressure steam drums The high water level alarm value is at a relatively low value during the start-up phase of the unit. When the alarm is triggered, the monitoring personnel have enough time to intervene on the water level. The invention has the beneficial effects of fast regulating speed, high efficiency, safety and reliability.

Description

Technical field [0001] The invention relates to a method and a device for improving the reliability of the starting water level of a waste heat boiler in a gas turbine power plant. It belongs to the field of gas turbine control systems. Background technique [0002] After the water in the condenser is pressurized by the condensate pump and the feed water pump, it enters the high, medium and low pressure steam drums respectively; after evaporation, steam-water separation, superheating and other technological processes, it finally becomes superheated steam and enters the steam turbine. The high-pressure superheated steam directly enters the high-pressure cylinder of the turbine; the medium-pressure superheated steam is mixed with the exhaust steam of the high-pressure cylinder and enters the intermediate-pressure cylinder of the turbine after being heated by the reheater; the low-pressure superheated steam is mixed with the exhaust steam of the intermediate-pressure cylinder and en...

AI Technical Summary

Problems solved by technology

[0004] One of the purposes of the present invention is to solve the problem that the water level of the waste heat boiler drum rises too fast during the start-up process of the unit, and the monitoring personnel have missed the best time to intervene when the high water level alarm is triggered

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