ZhaoZhi,LiuJinxin,HuangZhaowei,et al.Synergistic Regulation of Sludge Thermal Drying Efficiency and Fuel Properties by Temperature and Carbon-based Skeleton[J].China Water & Wastewater,2026,42(13):1-8.
Synergistic Regulation of Sludge Thermal Drying Efficiency and Fuel Properties by Temperature and Carbon-based Skeleton
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第42卷
Number:
第13期
Page:
1-8
Column:
Date of publication:
2026-07-01
- Keywords:
- sludge; carbon?based skeleton; thermal drying; water release; fuel properties
- Abstract:
- In the sludge thermal drying process, water evaporation consumes a large amount of energy, and the sludge adheres to the inner wall of the equipment, which reduces the heat transfer efficiency and even triggers the interruption of operation, resulting in high energy consumption and unstable operation. To this end, sludge thermal drying experiments were carried out in a wide temperature range of 80-250 ℃ to investigate the synergistic control mechanism of temperature and carbon?based skeleton on the sludge thermal drying efficiency and fuel properties. The results showed that the temperature increase accelerated water evaporation, and the carbon?based skeleton reduced the initial cohesive stress and adhesion stress of sludge by 43% and 37% respectively through the construction of porous water channels and the provision of rigid support, and improved the stability of the operation. The drying time was reduced by 53.5%, the drying efficiency was increased by 17%, and the drying energy consumption was reduced by 77.8% under the condition of 130 ℃. Temperatures exceeding 190 ℃ will lead to significant thermal decomposition of lipids and proteins, resulting in the loss of C and H elements and a decrease in the calorific value of the fuel by up to 44%. Therefore, carbon?based skeleton conditioning of sludge and thermal drying at 130 ℃ can achieve the dual goals of efficient dewatering and energy utilization of sludge.
Last Update:
2026-07-01