A Method for Determining Operating Valve Position of Subcritical Nozzle Distribution Steam Turbine
A determination method and technology of steam turbines, applied in mechanical equipment, engine components, machines/engines, etc., can solve problems such as suboptimal operation mode and affect the economy of the unit, and achieve the effect of good economy and strong operability
Active Publication Date: 2016-10-26
XIAN XIRE ENERGY SAVING TECH
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Problems solved by technology
The change of the steam intake will change the state of the steam intake mechanism, thus affecting the economy of the unit
That is, in a certain season, the operation mode required by the above curve is the best, but after the season changes, the original operation mode is no longer the best, so the curve has limitations
Method used
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Embodiment Construction
[0027] The present invention is described in further detail below in conjunction with accompanying drawing:
[0028] see figure 1 and figure 2 , the operation process of the steam turbine of the present invention is based on the intake steam flow rate of the high-pressure cylinder of the steam turbine (hereinafter referred to as the intake steam flow rate) to determine the valve position of the high-pressure regulating valve / high-pressure regulating steam valve. Since there is a certain corresponding relationship between the steam intake flow rate of the high-pressure cylinder of the steam turbine and the pressure after the adjustment stage of the nozzle steam turbine, the present invention is also characterized in that the steam intake flow rate of the high-pressure cylinder of the steam turbine can be adjusted by the pressure after the adjustment stage of the high-pressure cylinder (hereinafter referred to as the adjustment stage) pressure) means.
[0029] When the post-r...
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The invention discloses a method for determining the running valve position of a subcritical nozzle governing steam turbine. Steam inlet flow of a high-pressure cylinder of the steam turbine under a specific condition is used as a criterion of the change of the valve position of a high-pressure regulation valve of the steam turbine, and the pressure after the regulation stage is adopted to represent the steam inlet flow of the high-pressure cylinder; and the pressure which serves as the criterion, corresponds to the steam inlet flow of the high-pressure cylinder under the specific state and is obtained after the regulation stage is obtained through a test. The method overcomes the defects in the prior art and existing methods. The pressure after the regulation stage of the nozzle governing steam turbine is directly used as the criterion to determine the valve position of the high-pressure regulation valve. Meanwhile, the method for determining the valve position of the high-pressure regulation valve / a high-pressure regulation steam valve is provided. The method can guarantee that the steam turbine runs under optimal main steam pressure, meanwhile, optimal economical performance of the steam turbine is guaranteed and operability is extremely high.
Description
【Technical field】 [0001] The invention belongs to the technical field of steam turbines, and relates to a method for determining the valve position of a high-pressure regulating valve and main steam pressure during the operation of a subcritical nozzle steam distribution steam turbine, in particular to a method for determining the operating valve position of a subcritical nozzle steam distribution steam turbine. 【Background technique】 [0002] When the steam turbine generator set is running at partial load, if the operation mode is unreasonable, it will cause the economical decline of the unit operation and increase the coal consumption of power generation. Therefore, the operation mode of the unit is generally optimized in order to achieve the most economical operation mode. [0003] Under normal circumstances, the steam turbine manufacturer will give a suggested constant sliding pressure curve to guide the operation, and the power generation company will also find a suitabl...
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IPC IPC(8): F01D17/18
Inventor 江浩常东锋黄嘉驷谢天屈杰李钊王勇李欣
Owner XIAN XIRE ENERGY SAVING TECH