摘要
为研究絮凝作用对于工程废弃泥浆絮凝脱水的影响,提高工程废弃泥浆絮凝脱水处理效率,以有机、无机及复合絮凝剂对其进行絮凝脱水试验,深入探析工程废弃泥浆的絮凝机理。研究结果表明:添加无机、有机絮凝剂可以高效促进泥水分离速度和降低上清液浊度,然而基本上不会造成泥浆液的pH值的变化,其大小仅与废弃泥浆试样初始的pH值有关;依据上清液高度和浊度来评判絮凝剂效果好坏,有机高分子絮凝剂絮凝效果明显比无机高分子絮凝剂效果更加显著。选用无机加有机的复合絮凝剂,有利于充分结合发挥两类絮凝剂各自的絮凝方式—电中和作用及吸附架桥作用,促使复合絮凝剂的絮凝效果达到最佳;其中复合投加絮凝剂中,PAFC+APAM2(40 mL)组合的絮凝效果最佳。
In order to study the effect of flocculation on the flocculation and dewatering of engineering waste mud,and to improve the efficiency of flocculation and dewatering of engineering waste mud,organic,inorganic and compound flocculants were used to carry out flocculation and dewatering experiments,and to deeply analyze the flocculation mechanism of engineering waste mud.The research results show that:adding inorganic and organic flocculants can efficiently promote the mud-water separation speed and reduce the turbidity of the supernatant,but basically does not cause changes in the pH value of the slurry liquid,the size of which is only related to the initial pH value of the waste slurry samples;the height of the supernatant and the turbidity of the judging flocculant effect is good or bad,the flocculation effect of organic polymer flocculants is obviously more significant than the effect of inorganic polymer flocculants.Selection of inorganic and organic composite flocculants is conducive to the full combination of the two types of flocculants to play their respective flocculation mode-electric neutralization and adsorption and bridging effect,prompting the flocculation effect of the composite flocculants to achieve the best;which composite injection flocculants,PAFC+APAM2(40mL)combination of the flocculation effect of the best.
作者
蒋亚铭
李晓阁
余康
jiang ya-ming;LI Xiao-ge;yu kang(China Railway Construction Group Co.,Ltd.,100000,Beijing,China)
出处
《建筑技术》
2025年第5期634-639,共6页
Architecture Technology
基金
中铁建设科技研发计划“建筑工程泥浆循环再利用处理一体化技术”(22-65d)。
关键词
工程废弃泥浆
絮凝沉降
上清液高度
浊度
复合絮凝机理
engineering waste slurry
flocculation and settlement
supernatant height
turbidity
complex flocculation mechanism
作者简介
蒋亚铭(1977-),男,福建莆田人,高级工程师,e-mail:565008261@qq.com.
