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YAN Ying-ying,MENG Chun-lin,LIANG Yuan,et al.Continuous Deep Dewatering Coupled with Low Temperature Drying Process in Yingtan Sludge Treatment Plant[J].China Water & Wastewater,2020,36(16):105-110.
連續(xù)深度脫水耦合低溫干化工藝用于鷹潭污泥處理廠
- Title:
- Continuous Deep Dewatering Coupled with Low Temperature Drying Process in Yingtan Sludge Treatment Plant
- 摘要:
- 鷹潭市污泥處理廠設計處理規(guī)模為65 t/d（污泥含水率為80%），采用連續(xù)深度脫水耦合低溫干化兩段式組合工藝。第一段是干化前的預脫水，利用高壓帶式壓濾機將污泥含水率由80%降至65%~70%；第二段是污泥低溫干化設備，采用對流熱風干燥的方式對網帶上的濕料污泥進行脫水干化減量至含水率為20%。實踐表明，在低溫干化工藝前端增加機械深度脫水段，可以降低整體的投資和運行成本。此外，兩段式工藝提高了系統(tǒng)的靈活性及生產保障冗余度，干化污泥的處置出路近期為園林綠化肥料骨料，遠期送至垃圾焚燒廠進行摻燒。該工程的成功運行實現(xiàn)了鷹潭市污泥的減量化和資源化，對城鎮(zhèn)污水處理廠污泥處理處置工藝選擇具有示范意義。
- Abstract:
- The combined two-stage process of continuous deep dewatering coupled with low temperature drying was adopted in Yingtan sludge treatment plant with the capability of 65 t/d (the sludge water content was 80%). In the first stage of pre-dewatering before drying, the high-pressure belt filter press was used to reduce the water content to 65%-70% from 80% by mechanical dewatering. In the second stage of low temperature drying equipment, the water content of the wet sludge was reduced to 20% by convection hot air drying. The practice showed that adding a mechanical deep dewatering section at the front of the low temperature drying process could reduce the overall investment and operating costs. Furthermore, the two-stage process could enhance the flexibility and production guarantee redundancy of the system, the treated sludge were used as aggregate of landscaping fertilizer and would be sent to waste incineration plant in the long term. The successful operation of the project has realized the reduction and resource utilization of sludge in Yingtan, which is of demonstration significance to the selection of sludge treatment and disposal process in municipal wastewater treatment plant.
相似文獻/References:
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