生活垃圾填埋场腐殖土制备水玻璃工艺研究  

Process Research on Preparation of Sodium Silicate from Landfill Humus

作　　者：邹金生 何睿 刘冬雪 刘永光 郭倩楠 ZOU Jinsheng;HE Rui;LIU Dongxue;LIU Yongguang;GUO Qiannan(Shenzhen Energy Environmental Protection Co.Ltd.,Shenzhen Guangdong 518000;Shenzhen Institute of Advanced Technology,Chinese Academy of Sciences,Shenzhen Guangdong 518000)

机构地区：[1]深圳能源环保股份有限公司,广东深圳518000 [2]中国科学院深圳先进技术研究院,广东深圳518000

出　　处：《环境卫生工程》2024年第6期20-27,35,共9页Environmental Sanitation Engineering

摘　　要：为实现垃圾填埋场腐殖土的资源化利用,以深圳某生活垃圾填埋场的腐殖土为原料替代石英砂,采用干法-湿法相结合的生产工艺制备高模数优质工业水玻璃。结果表明:该腐殖土是制备水玻璃的理想硅源,酸浸后硅胶中SiO_(2)含量可达72.81%。在碳酸钠与腐殖土的质量比例为1∶1、煅烧温度为850℃、煅烧时间为120 min、液固比为8、NaOH浓度为2%、水热温度为160℃、水热时间为4 h的条件下,可以制得模数3.03的高模数水玻璃,达到GB/T 4209—2022工业硅酸钠中工业液体水玻璃L280-41所规定的优等品标准。In order to realise the resourceful use of landfill humus,the humus from a domestic waste landfill in Shenzhen was taken as the raw material to replace quartz sand,and a combination of dry and wet production process was adopted to prepare high modulus and high quality industrial water glass.The results showed that the humus was an ideal silica source for the preparation of water glass,the content of silica in the silica gel after acid leaching could reach 72.81%.When the mass ratio of sodiun carbonate to humus was 1∶1,the calcination temperature was 850℃,the calcination time was 120 minutes,the liquid-solid ratio was 8,the concentration of NaOH was 2%,the hydrothermal temperature was 160℃,and the hydrothermal time was 4 hours,the high-modulus water glass with a modulus of 3.03 could be prepared,which reached the standard of superior quality as stipulated in the industrial liquid waterglass L280-41 of GB/T 4209—2022 Sodium Silicate for Industrial Use.

关 键 词：腐殖土 二氧化硅 硅胶 干法 湿法 水玻璃 

分 类 号：X705[环境科学与工程—环境工程]