湖北农业科学 ›› 2023, Vol. 62 ›› Issue (6): 51-55.doi: 10.14088/j.cnki.issn0439-8114.2023.06.010

• 资源·环境 • 上一篇    下一篇

化学调理剂对河湖淤泥脱水效果及泥饼pH的优化

王龙涛1,2,3,4, 陈文峰1,2,3,4, 黄胜1,2,3,4, 徐扬帆1,2,3,4, 夏新星1,2,3,4   

  1. 1.中交第二航务工程局有限公司,武汉 430040;
    2.长大桥梁建设施工技术交通行业重点实验室,武汉 430040;
    3.交通运输行业交通基础设施智能制造技术研发中心,武汉 430040;
    4.中交公路长大桥建设国家工程研究中心有限公司,武汉 430040
  • 收稿日期:2022-05-06 出版日期:2023-06-25 发布日期:2023-07-18
  • 作者简介:王龙涛(1989-),男,安徽滁州人,工程师,主要从事河道综合治理研究,(电话)15527428682(电子信箱)wanglongtaoxyz@qq.com。
  • 基金资助:
    中交第二航务工程局有限公司科技专项(00-科技-JSKF-20190730-023)

Optimization effects of chemical conditioning reagent on the dehydration of river and lake sludge and the pH of sludge cake

WANG Long-tao1,2,3,4, CHEN Wen-feng1,2,3,4, HUANG Sheng1,2,3,4, XU Yang-fan1,2,3,4, XIA Xin-xing1,2,3,4   

  1. 1. CCCC Second Harbor Engineering Co., Ltd., Wuhan 430040, China;
    2. Key Laboratory of Large-span Bridge Construction Technology, Wuhan 430040, China;
    3. Research and Development Center of Transport Industry of Intelligent Manufacturing Technologies of Transport Infrastructure, Wuhan 430040, China;
    4. CCCC Highway Bridge National Engineering Research Centre Co., Ltd., Wuhan 430040, China
  • Received:2022-05-06 Online:2023-06-25 Published:2023-07-18

摘要: 以工程项目现场原有生石灰投加量为基础,研究了CaO不同投加量及其粒径对脱水效果及泥饼pH的影响;同时在CaO最适投加量及粒径的前提下开展了其与NaHCO3、木质素磺酸钙、聚合硫酸铁(PFS)、聚合氯化铝(PAC)、聚丙烯酰胺(PAM)的复合调配对淤泥脱水效果及泥饼pH变化的影响研究。结果表明,CaO投加量的减少可在一定程度上降低泥饼pH,但泥饼含水率有小幅度加大;不同粒径分布的CaO对淤泥调质,脱水后泥饼含水率有明显差异,随CaO粒径减小,泥饼含水率呈下降趋势,pH则呈上升趋势。NaHCO3、木质素磺酸钙与CaO联合调理能够降低淤泥泥饼的pH,但是泥饼含水率增加相对较大,脱水效果下降。PAC、PAM单独复配CaO脱水效果稍微优于PFS单独复配CaO,综合考虑脱水效果及泥饼pH,最佳组合为0.50%PAC+0.02%PAM+9.00%(120目)CaO。

关键词: 化学调理剂, 河湖淤泥, 泥饼, 脱水效果, pH

Abstract: The effects of different dosages and particles size of CaO on the dehydration effect and pH of sludge cake were investigated based on the original caustic lime dosage from the actual project. In addition, under the premise of the optimum addition and particle size of the lime, the compound formulation effects of CaO and NaHCO3, calcium lignin sulfonate, polyferric sulfate (PFS), polyaluminium chloride (PAC) and polyacrylamide (PAM) on dehydration effect and pH of sludge cake was studied. The results showed that, the reduction of the CaO dosage could decrease the pH of sludge cake to a certain extent, but the moisture content of sludge increased slightly. The moisture content of sludge cake after dewatering appeared significantly different for the different particle sizes of CaO powder. As a whole, the moisture content decreased, while the pH increased with the decrease of CaO particle size. The combination of NaHCO3, calcium lignosulfonate and CaO could reduce the pH of sludge cake, but weaken the dehydration effect,the moisture content of sludge cake increased relatively large. The dehydration effect of PAC or PAM compounded CaO was slightly better than that of PFS compounded CaO. Considering the dehydration effect and the pH of sludge cake, the optimal combination was 0.50% PAC + 0.02% PAM + 9.00% (120 mesh) CaO.

Key words: chemical conditioning reagent, river and lake sludge, sludge cake, dehydration effect, pH

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