摘要：

在常规三效蒸发器的基础上，通过增大换热器物料层流速、增加二次蒸汽的除沫器、增加第三效分离器的导流装置等改进措施，开发出改进型三效蒸发工艺，并成功用于煤化工MVR蒸发母液的处理。设计处理量为192 m³/d，实际处理量为220 m³/d，产水电导率小于300 μS/cm，COD小于40 mg/L，产水达到中水回用的标准；产盐含水率小于3%，吨水消耗蒸汽0.27 m³，吨水耗电为20.37 kW·h。

关键词: 零排放, 蒸汽机械再压缩技术, 三效蒸发, 滚筒式干燥

Abstract:

Based on conventional triple-effect evaporator, an improved triple-effect evaporator process was successfully developed to treat coal chemical MVR mother liquor, by the increasing the flow rate of material layer in heat exchanger, adding the demister in the secondary steam, and adding the diversion device in the third effect separator. The design treat capacity of raw water was 192 m³/d while the actual treat capacity of raw water was 220 m³/d. The conductivity of condensate water was less than 300 μS/cm, and COD was less than 40 mg/L. The quality of condensate could meet the recycle requirement of the factory. The moisture content in salt was less than 3%, and a ton water consumed 0.27 m³ steam and 20.37 kW·h of electricity.

Key words: zero discharge, mechanical vapor recompression, triple effect evaporation, roller drying

中图分类号: 

• X703