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RESEARCH AND AN ENGINEERING DEMONSTRATION OF SLUDGE DEWATERING TECHNOLOGY FOR DYEING INDUSTRY
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摘要: 印染行业是传统的劳动密集型产业，也是耗水大户，江浙地区是我国印染行业的集中区域。从资源化利用和实用的角度出发，针对江苏无锡某工业园区的印染污泥进行了试验研究，并根据研究结果，以常规的板框压滤工艺为主体，建设了40 t/d的印染污泥高压板框压滤脱水的示范工程。运行表明：压滤后污泥含水率平均值低于60%，并满足其作为原料送给火电厂掺烧的热值要求，达到了污泥减量化和资源化的目的。按照此示范工程处理能力估算，污泥减排率≥90%，年减排折合标准煤850 t以上。同时，压滤产生的废水通过"混凝沉淀+三维电催化氧化"预处理后，纳管排入园区的污水处理厂，未出现二次污染。Abstract: Dyeing industry is a traditional labor-intensive industry and with high water-consuming. In China, the dyeing industry is concentrated in Zhejiang and Jiangsu province. Based on the conventional plate-and-frame pressure filtration technology, the sludge of a dyeing industrial park in Wuxi, Jiangsu Province was studied experimentally. According to the research results, a 40 t/d demonstration project of sludge dewatering by high-pressure plate-and-frame pressure filtration was built. All the sludge of the dyeing industrial park were centralized treated and filtered. Sludge water content was less than 60%, which was subsequently sent to coal-fired power plant as the raw material to achieve the purpose of sludge reduction and heat resource recycling. At the same time, the wastewater after pressure filtration process was discharged to the wastewater treatment plant after coagulation sedimentation and three dimensional electrocatalysis, without secondary pollution.
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Key words:
- dyeing industry /
- sludge /
- plate pressure filtration /
- high pressure diaphragm
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