草浆碱回收绿液引晶法除硅工艺的研究  

Removal of Silicon from Green Liquor with Carbon Dioxide Seeding Crystal in the Chemical Recovery Process of Wheat Straw Soda Pulping

作　　者：李娜[1,2] 夏新兴[1,2] 童树华 

机构地区：[1]陕西科技大学轻工与能源学院,陕西西安710021 [2]华南理工大学制浆造纸工程国家重点实验室,广东广州510640 [3]浙江金昌纸业有限公司,浙江龙游324400

出　　处：《纸和造纸》2014年第5期16-20,共5页Paper and Paper Making

摘　　要：针对麦草浆碱回收绿液硅含量高的问题,采用CO2引晶法对绿液除硅,研究了不同工艺条件对H2SiO3颗粒的沉降性能、滤水性能以及粒径分布的影响。结果表明:引晶量15%,反应温度80℃,搅拌速度300 r·min-1,养晶时间60 min,绿液pH 9.70时除硅效果较好,所得H2SiO3颗粒也较容易洗涤和过滤。Aiming at the problem of high silica content of wheat straw green liquid, the method of seeding crystal with CO2 was used to remove silicon from green liquid, the effect of different process conditions on the sedimentation performance, water filtration performance and size distribution of silica particles made in green liquid. The results showed that when seed load was 15%, reaction temperature was 80℃, stirring speed was 300 r.min-1, crystallization time was 60 rain and pH of green liquid was 9.70, the effect preferably presented, the silicon particles were also relatively easy to wash and filter.

关 键 词：引晶法 沉降性能 粒径分布 滤水时间 

分 类 号：X793[环境科学与工程—环境工程]