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中、小型工业锅炉在我国工业企业中应用极广,其中蒸发量2吨/时以下的小型工业锅炉为数更多,约占锅炉总数量的80％左右。我国工业锅炉的特点是:(1)锅炉陈旧,技术性能差;(2)燃料耗量大,热效率低;(3)排污量大,一般达15％,有的高达25％以上;(4)管理水平较低,一般为手工操作,劳动强度大。针对我国工业锅炉的特点,既要进行锅炉炉体的改造,也要改善锅炉补给水和炉水的水质。本文仅介绍电渗析法处理工业锅炉补给水的效果和前景。一、锅炉水垢形成及其危害锅炉里,烟气向水的传热过程如下:
Medium and small industrial boilers are widely used in industrial enterprises in our country. Among them, there are more small industrial boilers with evaporation less than 2t / h, accounting for about 80% of the total number of boilers. The characteristics of our country’s industrial boilers are as follows: (1) Outdated boiler with poor technical performance; (2) Large fuel consumption and low thermal efficiency; (3) Large amount of sewage, generally up to 15%, and up to 25% Low level of management, usually manual operation, labor-intensive. In view of the characteristics of our country’s industrial boilers, it is necessary to carry out the boiler body transformation, but also to improve the boiler feed water and boiler water quality. This article only describes the effect and prospect of electrodialysis treatment of industrial boiler make-up water. First, the formation of boiler scale and its hazards Boiler, flue gas to water heat transfer process is as follows: