摘要：

反渗透工艺是目前处理高矿化度矿井水常用的工艺，该工艺浓缩分质后会产生超高矿化度的氯化钠、硫酸钠浓缩盐水。这种浓缩盐水只能蒸发结晶处理后方可排放，传统的蒸发结晶工艺由于能耗非常高限制了其应用。近来年，相对能耗较低的MVR蒸发结晶工艺在国内外得到较多应用。针对煤矿矿井水浓缩的超高矿化度特点，在MVR工艺的基础上对蒸发器进行改良，增设由高温超导材料制成的原液预热器，进一步提高传热效率。改良制造的MVR蒸发器（150 kg/h）应用于陕西小纪汗煤矿超高矿化度浓水的应用试验中，传热面积由2.80 m²提高至4.89 m²，蒸汽消耗量由179.40 kg/h减少到149.85 kg/h，每小时节约30 kg蒸汽，折合标准煤约2.8 kg，节能及碳减排效益显著。

关键词: 高矿化度矿井水, 蒸发结晶, 蒸汽机械再压缩技术, 能耗分析

Abstract:

The reverse osmosis process is a commonly used process for treating high salinity mine water at present. After concentration and separation，this process will produce ultra-high salinity sodium chloride and sodium sulfate concentrated brine. This concentrated brine can only be discharged after evaporation and crystallization treatment. The traditional evaporation and crystallization process has limited its application due to its high energy consumption. In recent years，the MVR evaporation crystallization process with relatively low energy consumption has been widely used at home and abroad. Based on the MVR process，the evaporator was improved to further improve the heat transfer efficiency by adding a raw liquid preheater made of high-temperature superconducting materials in response to the ultra-high salinity characteristics generated by the concentration of coal mine water. The improved MVR evaporator（150 kg/h） was applied to the application test of ultra-high salinity concentrated water in Xiaojihan Coal Mine，Shaanxi Province. The heat transfer area has increased from 2.80 m² to 4.89 m²，and the steam consumption has decreased from 179.40 kg/h to 149.85 kg/h，saving 30 kg of steam per hour，equivalent to about 2.8 kg of standard coal. The energy-saving and carbon emission reduction benefits are significant.

Key words: high salinity mine water, evaporative crystallization, mechanical vapor recompression, energy consumption analysis

中图分类号: 

• X703