LIZhi-yuan,RENShao-hui,LIUQing-chuan,et al.Operation Analysis of Sludge Flash Drying Coupled with Fluidized Bed Pyrolysis and Gasification Project[J].China Water & Wastewater,2025,41(12):125-129.
Operation Analysis of Sludge Flash Drying Coupled with Fluidized Bed Pyrolysis and Gasification Project
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第41卷
Number:
第12期
Page:
125-129
Column:
Date of publication:
2025-06-17
- Abstract:
- This paper takes the sludge flash drying coupled with fluidized bed pyrolysis and gasification project applied to the Zhongxiang municipal wastewater treatment plant in Hubei Province as an example to introduce the project overview, process characteristics and operating effects. The sludge water content is reduced from 80% to less than 30% after drying in a flash dryer, which can be pyrolyzed and vaporized stably in the fluidized bed with little temperature fluctuation in the furnace. The heavy metals and other components in the ash residue after sludge pyrolysis and gasification are lower than the standard limit for brick making, and can be used as raw materials for brick making to realize resource utilization. In addition, the content of pollutants such as soot, sulfur dioxide, nitrogen oxides, carbon monoxide, hydrogen chloride and dioxins in the exhaust gas can also meet the standard emission limits after treatment. Through the stable operation for 5 years, it is verified that the sludge flash drying coupled with fluidized bed pyrolysis and gasification technology is suitable for the large-scale centralized treatment of sludge, which provides a new idea and reference case for the disposal of municipal sludge.
Last Update:
2025-06-17