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Control method for improving reliability of utility boiler

A technology for power station boilers and control methods, which is applied to control systems, steam generation, lighting and heating equipment, etc., can solve problems such as the safety impact of water walls, affecting the reliability of power station boilers, consuming large amounts of materials, and starting oil, etc., to achieve peeling. The effect of obvious, safe and preventing, reducing the number of movements

Active Publication Date: 2011-11-09
CHINA SHENHUA ENERGY CO LTD +2
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AI Technical Summary

Problems solved by technology

[0006] When the thermal power generating set, especially for the high-power thermal generating set, when the equipment starts to operate, the frequent MFT action of the boiler will consume a lot of fuel to stop and start the oil, which will affect the safety of the water-cooled wall of the tower boiler. Large impact, thus affecting the reliability of power plant boilers

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  • Control method for improving reliability of utility boiler
  • Control method for improving reliability of utility boiler

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Embodiment Construction

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0019] The present invention provides a control method for improving the reliability of a boiler in a power station, which is used to maintain the normal operation of the entire thermal generator set after a trip occurs in a steam turbine or a generator in a thermal power generator set so as to improve the reliability of the boiler in a power station. It is achieved through the following four aspects:

[0020] a. Retain the horizontal interlocking protection between the generator and the steam turbine in the thermal power generation unit, and cancel the horizontal interlocking protection between the generator, the steam turbine and the boiler;

[0021] Since the thermal power generation unit is designed with a bypass system, even if the steam turbine trips, after the bypass system is opened, the fuel can be quickly reduced through the boiler s...

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Abstract

The method relates to a control method for improving the reliability of a utility boiler. The method is characterized by comprising the following steps of: 1, keeping transverse interlocking protection between a generator in a thermal generator set and a turbine and removing transverse interlocking protection among the generator, the turbine and the boiler; 2, immediately starting a bypath systemin the thermal generator set without triggering the action of main fuel trip (MFT) of the boiler after the turbine or the generator trips, and simultaneously starting a run back (RB) loop in the thermal generator set; 3, providing spare steam sources for a feed pump turbine and a deaerator in the thermal generator set; and 4, changing the valve position of high-pressure bypass and a pressure set value of low-pressure bypass in the bypass system of the thermal generator set to make steam discharge of a high-pressure cylinder smooth and the discharge temperature normal. Compared with the prior art, the method can effectively improve the reliability of the utility boiler.

Description

technical field [0001] The invention relates to the technical field of operation control of power plant boilers in thermal power generating sets, in particular to a control method for improving the reliability of power plant boilers. Background technique [0002] The principle of thermal power generation is generally: coal, oil, natural gas, gas and other fuels are used as fuel, and the treated fuel is delivered to the boiler by using transmission technology. The fuel is burned to heat the boiler to turn the water in the boiler into steam. After that, the water vapor enters the high-pressure cylinder. In order to improve thermal efficiency, the water vapor should be reheated. The water vapor enters the medium-pressure cylinder, and the steam from the medium-pressure cylinder is used to drive the blades of the steam turbine to drive the generator to generate electricity. The steam is drawn from the medium-pressure cylinder into the symmetrical low-pressure cylinder. Part of t...

Claims

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Application Information

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IPC IPC(8): F22B35/00
Inventor 朱介南罗韶辉吴永存王会
Owner CHINA SHENHUA ENERGY CO LTD
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