改良ADA法脱硫废液中硫氰酸钠的分离研究  

Research on Separation of Sodium Thiocyanate From Modified ADA Desulfurization Waste Solution

作　　者：王光辉[1] 万胜[1] 颜科求 邱江华[1] 曾丹林[1] 田永胜[1] 

机构地区：[1]武汉科技大学煤转化与新型炭材料湖北省重点实验室,武汉430081 [2]湖南煤化新能源有限公司,湖南娄底417000

出　　处：《工业安全与环保》2012年第5期21-23,33,共4页Industrial Safety and Environmental Protection

基　　金：高等学校博士学科点专项科研基金资助课题(200804880003);武汉科技大学青年科技骨干培育计划(2010xz013)

摘　　要：以乙醇和丙酮的混合液作为溶析剂,采用溶析结晶法从改良ADA法脱硫废液中分离硫氰酸钠。考察了结晶温度、溶析剂配比(V丙酮/V乙醇)、溶析剂/脱硫废液体积比、流加速率和搅拌速率对硫氰酸钠提取率的影响,通过单因素和正交实验确定了硫氰酸钠的最佳提取条件。结果表明,当温度为35℃,流加速率为160 mL/h,溶析剂/脱硫废液体积比为3,搅拌速率为150 r/min,溶析剂配比为V丙酮/V乙醇=2时,分离效果最好,在此条件下硫氰酸钠提取率为95.37%。thiocyanate is separated from modified ADA desulfurization waste solution by solventing- out crystalliza- tion with the mixed solution of ethanol and acetone used as anti- solvent. The effects of crystallization temperature, anti- solvent volume ratio（acetone/ethanol）, volume ratio of anti- solvent to desulfurization waste solution, feeding rate and stir- ring rate on the extraction rate of sodium thiocyanate are investigated. The best extraction conditions of sodium thiocyanate are obtained by single- factor and orthogonal experiments. The experimental results show that the extraction rate of sodium thiocyanate could reach 95.37 % under the conditions of the crystallization temperature at 35℃, feeding rate at 160 mL/h, volume ratio of anti - solvent to desulfurization waste solution at 3, stirring rate at 150 r/min and anti - solvent volume ratio at2.

关 键 词：改良ADA脱硫废液 硫氰酸钠 混合溶剂 乙醇与丙酮 溶析结晶 

分 类 号：X701.3[环境科学与工程—环境工程]