采用双螺杆压缩机的机械蒸汽再压缩污水处理系统试验研究  

Experimental Study of Mechanical Vapor Compression Wastewater Distillation System using Twin Screw Compressor

作　　者：沈九兵[1] 张凯[1] 邢子文[1] 房文娜 曹建文 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049 [2]江苏通润驱动设备股份有限公司,苏州215500

出　　处：《机械工程学报》2016年第10期185-190,共6页Journal of Mechanical Engineering

基　　金：国家自然科学基金资助项目(51276134)

摘　　要：对国内自主研发的采用双螺杆压缩机的60 t/d双效机械蒸汽压缩(Mechanical vapor compression,MVC)采油污水处理系统进行调试及变工况试验研究,分析压缩机转速、一效进水温度和二效出水循环量对系统产水量及产水能耗的影响,为系统优化设计及市场化提供参考。研究表明,系统能稳定运行,在60 t/d原料水处理量下,系统产水量约为1.03 t/h,每吨水处理能耗为35 k W·h;双螺杆压缩机工作过程喷入的冷却水水质需要满足一定要求,避免转子及机壳表面结垢发生故障;随压缩机转速升高,系统产水量升高,产水能耗存在最低值,即压缩机转速及系统运行工况存在最优匹配关系;系统产水量及产水能耗随一效进水温度升高而分别升高和降低,且这种规律不受压缩机转速影响;随着二效出水循环量的升高,系统产水量逐渐升高,升高幅值随一效入口温度升高而降低。An experimental study is carried out to a domestic developed mechanical vapor compression（MVC） wastewater distillation system that applied a twin screw compressor and had a treatment capacity of 60 t/d aiming to supply some reference for the system optimal design and marketization. According to the results, the system can operate stably with a distillate product rate of 1.03 t/h at a feed water flow rate of 60 t/d and the corresponding energy consumption is 35 k W·h. Purity of the water injects into twin screw compressor should be guaranteed to avoid the scaling on rotor surfaces. With the increase of compressor rotor speed, the system product rate increases linearly and the energy consumption had a minimum value which means that there exists an optimal rotor speed for each system operation condition. The system product rate increases and energy power consumption decreased separately with the first effect inlet temperature which is not affected by the compressor speed. Meanwhile, the product rate increases with the circulation volume of second effect outlet water and the growth rate decreased with the increase of first effect inlet water temperature.

关 键 词：双螺杆压缩机 机械蒸汽压缩 产水量 产水能耗 

分 类 号：TQ51[化学工程]