凝汽器真空系统不严对炉水氢电导率的影响

Infulence of the Inferior Sealing in Condenser Vacuum System on Boiler Water Cation Conductivity

针对华能丹东电厂2号炉水氢电导率超标问题做离子色谱分析、离子摩尔电导率核算,找出了磷酸根、硫酸根等杂质含量高是2号炉水氢导超标的原因。对炉水加药由磷酸盐处理改为采用氢氧化钠处理的方法,炉水氢导明显降低,但仍然超标。通过对污染源进行排查,明确凝汽器到锅炉补水箱间处于室外地埋管段的溢流管存在漏点,该溢流管与凝汽器补水管相通,并处于负压状态,补水时漏点附近污水经凝汽器进入给水,导致2号炉水氢导超标,漏点消除后2号炉水氢导超标得到根本性解决。

According to the phenomenon of No. 2 boiler water cation conductivity over-standard,it does ion chromatographic analysis and ion molar conductivity calculation. It finds the reasons that phosphoric acid root and sulfuric acid root impurity content is high.Through the boiler water phosphate treatment method to use sodium hydroxide,hydrogen boiler water conductivity decreased but still excessive. Through the multi-sources of pollution investigation,it is clearly that the condenser to the boiler makeup tank and the overflow pipe in the outdoor section of underground pipe leak exists. The overflow pipe and condenser water inlet pipe are interlinked in the vacuum state. When water leak near the dirty water goes through the condenser into the water,it leads to water-hydrogen furnace No. 2 lead exceeded. After the elimination of the leak hydrogen No. 2 boiler water conductivity exceeding completely solved.