1000MW超超临界机组抽汽逆止阀门活动试验方法优化

Optimization of the Method for Testing the Flexibility of a Steam Extraction Non-return Valve in a 1000 MW Ultra-supercritical Unit

由于1 000 MW超超临界机组抽汽逆止阀门活动试验只能在现场通过活动手柄进行、并且部分抽汽逆止门位置较高、存在不安全因素及劳动强度大等问题。通过对抽汽逆止阀门控制气路和动作原理的分析,将控制气路进行改造,从而实现在DCS操作系统中进行抽汽逆止阀门活动试验,解决了现场试验环境不利等因素,提高了1 000 MW超超临界机组的自动化水平。

The flexibility test of the steam extraction non-return valve of a 1 000 MW ultra-supercritical can be only conducted on the spot by using the mobile handle and a part of steam extraction non-return valves are located at a relatively high positions,thus there exist some unsafe factors and a strong laboring strength etc. Through an analysis of the control air circuit and working principles of the steam extraction non-return valve,a modification was made to the control air circuit,thus realizing a flexibility test of a steam extraction non-return valve conducted in a DCS operation system,solving the problem that the on-the-spot test environment is adverse and enhancing the automation level of 1 000 MW ultra-supercritical units.