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Study on the combined sewage sludge pyrolysis and gasification process : mass and energy balance

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Study on the combined sewage sludge pyrolysis and gasification process : mass and energy balance
นักวิจัย : Wang, Zhonghui , Chen, Dezhen , Song, Xueding , Zhao, Lei
คำค้น : DRNTU::Engineering::Civil engineering.
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2555
อ้างอิง : Wang, Z., Chen, D., Song, X., & Zhao, L. (2012). Study on the Combined Sewage Sludge Pyrolysis and Gasification Process: Mass and Energy Balance. Environmental Technology. , http://hdl.handle.net/10220/8304 , http://dx.doi.org/10.1080/09593330.2012.683816 , 166103
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Environmental technology
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

A combined pyrolysis and gasification process for sewage sludge was studied in this paper for the purpose of its safe disposal with energy self-balance. Three sewage sludge samples with different dry basis lower heat values (LHV(db)) were used to evaluate the constraints on this combined process. Those samples were pre-dried and then pyrolysed within the temperature range of 400–550 °C. Afterwards, the char obtained from pyrolysis was gasified to produce fuel gas. The experimental results showed that the char yield ranged between 37.28 and 53.75 wt% of the dry sludge and it changed with ash content, pyrolysis temperature and LHV(db) of the sewage sludge. The gas from char gasification had a LHV around 5.31–5.65 MJ/Nm3, suggesting it can be utilized to supply energy in the sewage sludge drying and pyrolysis process. It was also found that energy balance in the combined process was affected by the LHV(db) of sewage sludge, moisture content and pyrolysis temperature. Higher LHV(db), lower moisture content and higher pyrolysis temperature benefit energy self-balance. For sewage sludge with a moisture content of 80 wt%, LHV(db) of sewage sludge should be higher than 18 MJ/kg and the pyrolysis temperature should be higher than 450 °C to maintain energy self-sufficiency when volatile from the pyrolysis process is the only energy supplier; when the LHV(db) was in the range of 14.65–18 MJ/kg, energy self-balance could be maintained in this combined process with fuel gas from char gasification as a supplementary fuel; auxiliary fuel was always needed if the LHV(db) was lower than 14.65 MJ/kg.

บรรณานุกรม :
Wang, Zhonghui , Chen, Dezhen , Song, Xueding , Zhao, Lei . (2555). Study on the combined sewage sludge pyrolysis and gasification process : mass and energy balance.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Wang, Zhonghui , Chen, Dezhen , Song, Xueding , Zhao, Lei . 2555. "Study on the combined sewage sludge pyrolysis and gasification process : mass and energy balance".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Wang, Zhonghui , Chen, Dezhen , Song, Xueding , Zhao, Lei . "Study on the combined sewage sludge pyrolysis and gasification process : mass and energy balance."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2555. Print.
Wang, Zhonghui , Chen, Dezhen , Song, Xueding , Zhao, Lei . Study on the combined sewage sludge pyrolysis and gasification process : mass and energy balance. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2555.