汽轮发电机氢气排污方法的安全性及经济性分析

Safety and Economy Analysis on Blowdown Method of Hydrogen Cooling System for Steam Turbo-Generator Sets

介绍了600 MW汽轮发电机组氢气系统运行中经常发生的氢气纯度下降快、氢气持续微漏需要经常补氢或排污的问题,不当的氢气排污方法会造成氢气浪费、氢气纯度提升速度慢,还会给机组设备和人员的安全带来极大威胁。用计算、分析和试验验证的方法,研讨了补氢排污过程中氢气纯度和氢压的变化。分析计算和试验验证表明:在相同的氢气用量下连续式补氢排污的安全性和经济性要优于间断式补氢排污的方法。

An introduction is being presented to the problems of fast drop of hydrogen purity, and need of hydrogen filling or pollutant discharge due to continuous micro-leakage of hydrogen, which happens to the hydrogen system of a 600 MW steam turbo-generator set in operation. Improper blowdown method may produce hydrogen waste, slow hydrogen purity improvement, and bring great threatens to equipment and personnel. Further studies and discussion are made over the purity and pressure changes of hydrogen in hydrogen-filling and pollutant discharge process through the method of calculation, analysis and experimental verification, which shows that the safety and economy of continuous hydrogen filling and pollutant discharge are better than those of intermittent method at the same hydrogen consumption.