化工厂废热水多效蒸馏制取高纯水技术分析  

TECHNICAL ANALYSIS OF PRODUCING HIGH PURITY WATER BY MULTI-EFFECT DISTILLATION USING WASTE HEAT FROM CHEMICAL PLANT

作　　者：冯东东[1,2] 徐士鸣[1] 陈顺权[2] 张凤鸣[2] 

机构地区：[1]大连理工大学能源与动力学院,海洋能源利用与节能教育部重点实验室,辽宁大连116024 [2]广州中国科学院先进技术研究所,广东省膜材料与膜分离重点实验室,广东广州511458

出　　处：《水处理技术》2014年第9期57-61,共5页Technology of Water Treatment

基　　金：2012年粤港关键领域重点突破项目(2012498C12)

摘　　要：以某化工厂催化蒸馏装置排出的约80℃的废热水作为热源,设计了1种采用低温多效蒸馏技术并基于化工生产过程中的低污染度废水为原水的制取高纯水(蒸馏水)的物理系统;通过建立流量和能量分布的稳态数学模型,对系统进行热力计算,得到在给定工况下的理论产水量为0.92kg/s;对系统喷淋量的设计值进行合理性验证,模拟并分析了不同热源温度和冷却水温度对系统产水量的影响。结果表明,蒸馏系统产水量随热源水温度升高而增大,但超过设计温度(80℃)后增幅减小;冷却水进水温度升高会导致产水量下降。A physical process model using low temperature multi-effect distillation technology is designed to produce pure water （distilled water） by lowpollution wastewater from chemical industry as the raw water and hot water about 80 ℃ discharged from chemical catalytic distillation unit as a heat source. The theoretical yield of water （0.92 kg/s） in the given conditions is obtained from the calculation of the thermodynamic parameters in the system through the establishment of mathematics model with flow and energy distribution in stable state. The rationality on the design value of spray capacity in the system was verified. The effect of different temperature of heat source and the cooling water on water production of the system is simulated and analyzed. The results showed that the water production of the system grows synchronously with the increase of the temperature, but the amplification was reduced after exceeding the design temperature （80 ℃）. And water production decreased with the increase of the cooling water inlet temperature.

关 键 词：废热水 低温多效蒸馏 喷淋流量 热力计算 

分 类 号：X703.1[环境科学与工程—环境工程]