为解决高盐废水蒸发结晶过程能耗较高的问题，设计开发了一套高效、节能的MVR热泵蒸发结晶系统，并以羟丙基甲基纤维素（HPMC）生产过程产生的高盐废水作为被处理物料开展实验研究。结果表明，开发的MVR热泵蒸发结晶系统运行稳定，各项工艺参数达到设计要求；系统蒸发量、运行能耗、COP、SMER等系统性能参数随着蒸发温度的升高逐渐增大，且理论值与实验值拟合较好；系统节能效果显著，相比传统三效与四效蒸发可分别节约标煤56.0%、41.4%，分别节约运行费用38.8%和18.3%。

A set of mechanical vapor recompression (MVR) heat pump evaporation-crystallization system with the characteristics of efficient and energy-saving is developed to reduce the energy consumption in the treatment of high salinity wastewater.High salinity wastewater generated in the production process of hydroxypropyl methyl cellulose (HPMC) is used as the test medium for a series of experimental studies.The results show that the developed MVR system runs stably with various process parameters meeting the design requirements.The system performance parameters such as evaporation capacity, operation power consumption, COP, and SMER increase with the increasing evaporation temperature, and the simulated values fit well with the experimental values.Moreover, the system can achieve a significant energy conservation effect.Compared with traditional three-effect and four-effect evaporation systems, it saves about 56.0% and 41.4% of standard coal, respectively, and saves 38.8% and 18.3% of operation cost.

侯超(1991-),男,博士生,研究方向为热力过程优化与节能,ucas_hc@163.com。