MENGXin,CHENWei,CHENBai-xiao.Practice of Xiaoshan 4 000 t/d Centralized Sludge Incineration Project[J].China Water & Wastewater,2022,38(8):127-132.
Practice of Xiaoshan 4 000 t/d Centralized Sludge Incineration Project
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第8期
Page:
127-132
Column:
Date of publication:
2022-04-17
- Keywords:
- municipal sludge incineration; deep dewatering of sludge; circulating fluidized bed boiler
- Abstract:
- In view of the difficult issues of sludge treatment in a wastewater treatment plant, Xiaoshan 4 000 t/d centralized sludge was treated by the combination of deep dewatering, incineration and power generation. Chemical conditioning and mechanical pressure filtration are adopted in the process of deep dewatering, and the sludge with various moistures can be dewatered to meet the requirement of incineration by the single dewatering process. After dewatering, the sludge moisture was reduced to 45%-50%. After mixing with coal of 10% weight, the sludge was sent to the circulating fluidized bed boiler for incineration. Compared with common coal-fueled power plants, the sludge-to-coal ratio is much higher, thus the sludge incineration capacity has been greatly improved as high as 1 800 t of sludge (moisture 45%) every day. The waste heat of sludge combustion is used for power generation, thus realizing energy conversion and net energy output. The flue gas treatment system is equipped with limestone-gypsum wet desulfurization, electrostatic dust removal, baghouse dust removal, low nitrogen combustion, and other technical measures, thus the gas emission stably outperforms the Directive of EU2010/75/EC in a long run.
Last Update:
2022-04-17