多效蒸发处理含盐污水系统中基于文丘里效应的负压装置的设计研究  

Venturi-Effect Based Pump for Salty Wastewater Processing with Multi Effect Evaporator

作　　者：张奥兵 赵金辉[1] 海涵 白宇琦 Zhang Aobing;Zhao Jinhui;Hai Han;Bai Yuqi(Zhengzhou University,Zhengzhou 450000,China)

机构地区：[1]郑州大学化工与能源学院,郑州450000

出　　处：《真空科学与技术学报》2020年第10期971-977,共7页Chinese Journal of Vacuum Science and Technology

基　　金：中国石油化工股份有限公司洛阳分公司博士后工作站项目(194453)。

摘　　要：针对多效蒸发法处理含盐污水真空装置管路复杂、运行电耗高的问题,本文基于文丘里效应,设计了一种以一效乏汽为驱动蒸汽的新型负压多效蒸发系统,与多效蒸发器组成联合系统处理含盐污水。分析了新型负压多效蒸发系统的运行效果,研究了引射蒸汽压力、引射压力对系统造水比的影响,并进行了实验验证。研究发现新型负压多效蒸发系统运行稳定,系统引射压力提高,造水比提升速度减小;相比传统多效蒸发系统,节能率可达47%。该系统在处理含盐污水方面取得了较好的处理效果并具有良好的经济性。The conventional multi-effect evaporator,a high-tech device to process salty wastewater,was modified with the self-developed "Venturi-effect pump" and by reusing the 1st-stage high-speed exhaust steam.The original work was the jet-nozzle inside a T-junction.The flow field in T-junction was mathematically modeled theoretically analyzed,numerically simulated and experimentally evaluated.The influence of the injection steam pressure and nozzle diameter on the water production ratio was investigated for design optimization.The results show that when it comes to low-pressure generation,the lab-built "Venturi-effect pump" works well.Specifically,as a substitute for the 1st-stage vacuum pump,it increases the injection pressure and decreases the increase-rate of water-production ratio,resulting in reduction of energy consumption by 47%.We suggest that the self-developed "Venturi-effect pump" be of some technological interest in design optimization of multi-effect evaporator for salty sewage processing.

关 键 词：多效蒸发器 造水比 能效 蒸汽压力 

分 类 号：TK9[动力工程及工程热物理]