MVR成套装置工程化应用研究

Research on Engineering Application of MVR Complete Sets

高盐污水近零排放及资源化利用的成套处理装置包含预处理、膜浓缩、蒸发结晶三大工序。其中蒸发结晶工序主要包括MVR工序、硝盐联产工序和干燥包装工序。文章主要介绍蒸发结晶工序中MVR工序工程化应用,使用节能型的MVR蒸发设备,采用蒸汽机械再压缩技术,既提高热能的循环利用率,又节约成本,并且保证了水资源回用率的最大化。该装置初步实现了废水零排放工程化应用,通过MVR工序干燥出结晶盐氯化钠纯度达到99.9%,盐的颗粒大小分布均匀,符合该套装置基础设计的要求。

The complete set of treatment equipment for near-zero discharge and resource utilization of high-salt wastewater includes three major processes[2]: pretreatment, membrane concentration, and evaporation and crystallization. The evaporation crystallization process mainly includes the MVR process, the nitrate co-production process and the dry packaging process. This article mainly introduces the engineering application of the MVR process in the evaporation crystallization process. The use of energy-saving MVR evaporation equipment and the use of steam mechanical recompression technology not only improve the recycling rate of heat energy, but also save costs, and ensure the maximum water reuse rate. The device has initially realized the engineering application of zero discharge of wastewater. The purity of the crystalline salt sodium chloride dried through the MVR process reaches 99.9%, and the particle size of the salt is uniformly distributed, which meets the requirements of the basic design of the device.