食用氯化钾生产工艺节能改造

Energy saving reconstruction for edible potassium chloride production technology

在蒸发结晶法生产食用氯化钾工艺中,存在高能耗、高碳排放的问题。每生产1 t食用氯化钾需消耗2 t蒸汽,而80%的蒸汽消耗产生在氯化钾的结晶过程中。为了解决这个问题,利用DTB结晶器和MVR蒸汽压缩技术对结晶工艺进行了改造。结果表明:改造后工艺与原工艺相比,结晶工段蒸汽实现零消耗,总的蒸汽消耗降至0.4 t,蒸汽消耗减少80%,每1 t产品成本节约了280元,以年产1万t食用氯化钾计,生产系统可节约成本280万元;同时,二氧化碳的排放量也比过去减少80%以上,实现了节能减排的目的。

There are the problems of high energy consumption and high carbon emission in the production technology of edible potassium chloride by evaporation crystallization process.1 t edible potassium chloride product will consume 2 t steam, and 80% of the steam consumption is in the crystallization process of potassium chloride.In order to solve these problems, DTB crystallizer and MVR steam compressor technologies were used on the process.Results showed that： compared with the original technology,crystallization process realized steam zero consumption after the transformation;the total steam consumption was reduced to 0.4 t, and steam consumption reduced by 80% ; 280 Yuan cost was saved per 1 t product; with an annual output of 10 000 t edible potassium chloride, annual cost savings of production system was up to 2.8 million Yuan;at the same time ,carbon dioxide emission also reduced by more than 80% ,and therefore the purpose of energy saving and emission reduction was achieved.