草浆黑液水热炭化法碱回收研究  

Research on alkali recovery of straw back liquor with hydro-thermal charring method

作　　者：张金平[1] 魏志平 王云山[1] 杨刚[1] 孙勇[1] 李智新[1] 

机构地区：[1]中国科学院过程工程研究所湿法冶金清洁生产技术国家工程实验室,北京100190 [2]鄯善工业园区管委会,新疆鄯善838200

出　　处：《中华纸业》2012年第12期20-25,共6页China Pulp & Paper Industry

摘　　要：草浆造纸黑液经水热炭化法两级处理,黑液COD去除率可达95%,脱硅率超过80%,色度降低80%。水热炭化液经预蒸发、石灰乳苛化,碱回收率介于77%～81%。水热炭化料经炭化、水蒸汽物理活化可制备活性炭产品,其吸附性能达到商品级活性炭。水热炭化法处理造纸黑液具有较好的实用价值。Straw back liquor was treated with two-stage hydro-thermal charring method, which lead to COD removal rate up to 95%, silicon removal rate above 80% and chroma reduction by 80% in the back liquor. Hydro-thermal charring liquor was evaporated and causticized by lime, with the alkali recovery rate between 77% and 81%. Activated carbon was made by charring and water vapor activation, its adsorption performance was in accordance to commercial activated carbon. It proved that the hydro-thermal charring process has good actual value for back liquor treatment.

关 键 词：草浆黑液 水热炭化法 碱回收 

分 类 号：X793[环境科学与工程—环境工程]