ZENGZheng-ren,SUNZheng,BAIHua-qing,et al.Technical Transformation Practice of Flocculation Sedimentation Tank in an Aging Waterworks[J].China Water & Wastewater,2024,40(4):89-92.
老旧自来水厂絮凝沉淀池技术改造实践
- Title:
- Technical Transformation Practice of Flocculation Sedimentation Tank in an Aging Waterworks
- Keywords:
- waterworks; composite sedimentation tank; flocculation sedimentation tank; grid flocculation; trussed sludge scraper; alum floc
- 摘要:
- 某自来水厂一期工程设计规模9×104 m3/d，建于1995年，采用平流沉淀池工艺，2010年改造为平流斜管复合沉淀池。由于絮凝效果差、斜管沉淀区底部排泥不彻底、“跑矾”等原因导致实际产水量仅为7×104 m3/d，亟需进行优化改造，以提高产水量。采取延长絮凝时间、将机械+网格絮凝改为网格絮凝并优化布置、用桁架式吸泥机替代穿孔管排泥、增加配水区高度等技术改造措施后，产水量提高至10.5×104 m3/d。
- Abstract:
- The first phase of a waterworks with design capacity of 9×104 m3/d, using horizontal sedimentation tank technology, was built in 1995, and transformed into horizontal inclined tube composite sedimentation tank in 2010. Due to the poor flocculation effect, incomplete sludge discharge at the bottom of the inclined tube sedimentation zone, and alum runout, the actual water production yield is only 7×104 m3/d, so that it is urgent to optimize and transform to improve the water yield. By extending the flocculation time, changing mechanical and grid flocculation to grid flocculation and optimizing the layout, trussed sludge scraper instead of perforated pipe for sludge discharge, and increasing the height of the water distribution area, etc., the water yield was increased to 10.5×104 m3/d.
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