Method for determining steam distribution parameters of full-arc admission throttling governing steam turbine
A technology of throttling adjustment and full-cycle steam intake, applied in mechanical equipment, engine components, machines/engines, etc., it can solve problems such as large workload and complicated parameter determination process, and achieve easy calculation, easy programming, and simplified configuration. The effect of steam calculation
Active Publication Date: 2017-09-08
XIAN XIRE ENERGY SAVING TECH
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Problems solved by technology
The parameter determination process is complicated and the workload is heavy
Method used
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[0060] figure 1 It is a schematic diagram of a 1000MW ultra-supercritical steam turbine high-pressure valve structure. The rated main steam pressure of the steam turbine is 26.25MPa, and the rated main steam temperature is 600°C.
[0061] The basic working condition conditions here are stipulated as follows:
[0062] The main steam pressure and temperature are rated values, that is, 26.25MPa, 600°C, that is, p 0b =26.25MPa, T 0b =600°C; when the valve is fully open, the pressure loss of the fully open valve is taken as 3%, and the main steam flow / turbine inlet steam flow G under the reference condition b =2800t / h.
[0063] Situation 1: Given the initial parameters, the opening of each valve / pressure loss of each valve, find the steam inlet flow of the steam turbine;
[0064] Assuming the main steam pressure p 0 =20MPa, T 0 =596°C, take 20% of the valve pressure loss, find the steam inlet flow rate or steam inlet coefficient of the steam turbine under this state.
[0065...
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The invention discloses a method for determining steam distribution parameters of a full-arc admission throttling governing steam turbine. According to the method, a steam distribution equation of the full-arc admission throttling governing steam turbine is provided; and the situations involved in steam distribution calculation of the full-arc admission throttling governing steam turbine such as the situation for solution of the admission flow of the steam turbine when an initial parameter and opening degree / pressure loss of a high-pressure regulating valve are known, the situation for solution of the opening degree / pressure loss of the high-pressure regulating valve when the admission flow of the steam turbine and the initial parameter are known, the situation for solution of the initial parameter when the admission flow of the steam turbine and the opening degree / pressure loss of the high-pressure regulating valve are known can all be counted as solution for the steam distribution equation. The method has the advantages that the steam distribution calculation can be simplified, and programmed calculation can be facilitated.
Description
[0001] 【Technical field】 [0002] The invention belongs to the technical field of steam turbines, and relates to a method for determining steam distribution parameters of a steam turbine for throttling around the entire circumference. [0003] 【Background technique】 [0004] For steam turbines with full-circle throttling regulation, the steam distribution method of its high-pressure valve has a great impact on the safety and economy of steam turbine operation. Therefore, the determination of its steam distribution parameters is the basis for thermal design, operation optimization and performance analysis of steam turbines. The determination of the steam distribution parameters of the full-circle steam inlet throttling adjustment steam turbine generally includes 1) knowing the initial steam inlet parameters of the steam turbine, the pressure loss of the high-pressure valve, etc., and solving the inlet steam flow of the steam turbine; 2) knowing the initial steam inlet parameters ...
Claims
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Login to View More IPC IPC(8): F01D17/10
CPCF01D17/10
Inventor 江浩常东锋屈杰黄嘉驷刘永林王伟谢天
Owner XIAN XIRE ENERGY SAVING TECH