摘要
研究了真空条件下利用溴化锂溶液强吸湿性促使含硫酸钠废水蒸发冷却结晶脱盐过程。以硫酸钠质量分数为15%的废水为例,考察了结晶器搅拌强度、吸收器搅拌强度以及溴化锂溶液浓度对脱盐率的影响。结果表明:提高吸收器内搅拌强度、增大溴化锂溶液浓度皆可提高废水降温速率以及脱盐率,结晶器内搅拌强度则对脱盐率无显著影响;在结晶器和吸收器的搅拌强度分别为200~400r·min^-1和500~1500r·min^-1、溴化锂溶液质量分数为50%~58%、以及停留时间20min条件下,其脱盐率为42%~57%。
The process of evaporative cooling and crystallization desalination of sodium sulfate wastewater by using the strong hygroscopicity of lithium bromide solution was studied under vacuum conditions.The solution containing sodium sulphate of 15% by mass was taken as the sample wastewater,and the effects of the stirring rates of crystallizer and absorber and the lithium bromide solution concentration on desalination rate were investigated.The results show that the cooling and desalination rate increase with the increasing stirring rate in the absorber and the concentration of lithium bromide solution.The stirring rate in the crystallizer has no significant effect on the desalination rate.The desalination rate is 42%-57% under the following conditions: the stirring rates in the crystallizer and absorber are 200-400 r·min^-1 and 500-1500 r·min^-1,respectively;the concentration of lithium bromide solution is 50%-58% by mass;and the residence time is 20min.
作者
张峰榛
张孝果
杨虎
郑丹
杜怀明
ZHANG Feng-zhen;ZHANG Xiao-guo;YANG Hu;ZHENG Dan;DU Huai-ming(School of Material and Chemical Engineering,Sichuan University of Science and Engineering,Zigong 643000,China)
出处
《天然气化工—C1化学与化工》
CAS
CSCD
北大核心
2019年第3期49-52,共4页
Natural Gas Chemical Industry
基金
过程装备与控制工程四川省高校重点实验室开放基金科研项目(GK201709)
关键词
含盐废水
真空蒸发
结晶
脱盐
salty wastewater
vacuum evaporation
crystallization
desalination
