The municipal sludge drying-independent incineration system was simulated using numerical simulation software
and the impacts of factors such as the moisture content of wet sludge
moisture content of sludge into the furnace
inlet air temperature to the furnace
excess air coefficient
and natural gas supplementary flow rate on key parameters of the sludge incineration system
pollutant emission characteristics
and operational benefits were explored. Results indicate that key parameters such as the combustion temperature inside the incinerator
boiler evaporation flow rate
and auxiliary steam flow rate are primarily influenced by the moisture content of sludge into the furnace and the excess air coefficient. The pollutant emission characteristics of sludge incineration are mainly affected by the combustion temperature within the furnace
the excess air coefficient
and the auxiliary combustion conditions. Among them
the concentrations of NOx and SO2 in the flue gas are primarily related to the combustion temperature within the furnace and the excess air coefficient
while changes in CO concentration are not only influenced by above two factors but also mainly affected by auxiliary combustion. When the average combustion temperature inside the incinerator is set at 960 ℃ and the exhaust gas temperature is set at 190 ℃
if the moisture content of sludge into the furnace is higher than 41%
and the wet sludge moisture content is higher than 79%
the system could not sustain independent incineration and required natural gas supplementary combustion. The parameter that has the greatest impact on operational benefits is the wet sludge moisture content. Through multi-variable optimization calculations
the optimal benefit for wet sludge disposal is determined to be 292.81 yuan/t.
关键词
Keywords
references
段妮娜, 谭学军, 张辰. 基于Aspen Plus对污水处理厂污泥干化焚烧的热工模拟与优化[J]. 给水排水, 2023, 49(7): 22-28.DUAN Nina, TAN Xuejun, ZHANG Chen.Process simulation and optimization for sewage sludge drying and incineration using Aspen Plus[J]. Water Wastewater Engineering, 2023, 49(7): 22-28.
袁言言, 黄瑛, 张冬, 等. 污泥焚烧能量利用与污染物排放特性研究[J]. 动力工程学报, 2016, 36(11): 934-940.YUAN Yanyan, HUANG Ying, ZHANG Dong, et al. Energy utilization and pollutants emission in sewage sludge incineration[J].Journal of Chinese Society of Power Engineering, 2016, 36(11): 934-940.
闻哲, 王波, 冯荣, 等. 城镇污泥干化焚烧处置技术与工艺简介[J]. 热能动力工程, 2016, 31(9): 1-8, 129. WEN Zhe, WANG Bo, FENG Rong, et al. Brief introduction of the urban sludge drying incineration disposal technology and its process[J]. Journal of Engineering for Thermal Energy and Power, 2016, 31(9): 1-8, 129.
张辰, 段妮娜, 张莹, 等. 污水处理厂污泥独立焚烧工艺路线及适用性解析[J]. 给水排水, 2021, 57(1): 41-48. ZHANG Chen, DUAN Nina, ZHANG Ying, et al.Analysis and comparison of the technical routes of sewage sludge mono-incineration[J]. Water & Wastewater Engineering, 2021, 57(1): 41-48.
蔡璐, 陈同斌, 高定, 等. 中国大中型城市的城市污泥热值分析[J]. 中国给水排水, 2010, 26(15): 106-108. CAN Lu, CHEN Tongbin, GAO Ding, et al. Investigation on calorific value of sewage sludges in large and middle cities of China[J]. China Water & Wastewater, 2010, 26(15): 106-108.
王斌, 马潇然, 解利方, 等. 焚烧低热值污泥难点及应对措施[J]. 给水排水, 2024, 60(11): 8-11.WANG Bin, MA Xiaoran, XIE Lifang, et al.Difficulties and countermeasures for incineration of low calorific value sludge[J]. Water & Wastewater Engineering, 2024, 60(11): 8-11.
石万, 李晓姣, 袁进, 等. 基于Aspen Plus污泥耦合发电对循环流化床锅炉性能影响的模拟研究[J]. 洁净煤技术, 2024, 30(增刊2): 342-349.SHI Wan, LI Xiaojiao, YUAN Jin, et al.Simulation study on the influence of sludge coupling power generation on circulating fluidized bed boiler system based on Aspen Plus[J]. Clean Coal Technology, 2024, 30(Sup2): 342-349.
HU Yukun, WANG Jihong, TAN CK, et al. Further improvement of fluidized bed models by incorporating zone method with Aspen Plus interface[J]. Energy Procedia, 2017, 105: 1895-1901.
RAJENDRAN K, KANKANALA H R, LUNDIN M, et al. A novel process simulation model (PSM) for anaerobic digestion using Aspen Plus[J]. Bioresource Technology, 2014, 168: 7-13.
MOHSENZADEH A, ZAMANI A, TAHERZADEH M J. Bioethylene production from ethanol: a review and techno-economical evaluation[J]. ChemBioEng Reviews, 2017, 4(2): 75-91.
王长清, 谭煜幺, 徐瑞昌, 等. 1000 MW燃煤机组钙循环烟气CO2捕集系统模拟研究[J]. 动力工程学报, 2025, 45(5): 738-746.WANG Changqing, TAN Yuyao, XU Ruichang, et al. Simulation study on CO2 capture system of calcium cycle flue gas of a 1000 MW coal-fired power generation unit[J]. Journal of Chinese Society of Power Engineering, 2025, 45(5): 738-746.
霍小华. 基于ASPENPLUS模拟的污泥自热干燥焚烧发电工艺[J]. 电力学报, 2011, 26(5): 428-431.HUO Xiaohua. Sludge auto-thermal drying and incineration generation simulation with ASPEN PLUS[J]. Journal of Electric Power, 2011, 26(5): 428-431.
王清, 陈晓平, 杨叙军, 等. 基于Aspen Plus的城市污泥中低温气化模拟研究[J]. 建筑热能通风空调, 2020, 39(8): 11-15.WANG Qing, CHEN Xiaoping, YANG Xujun, et al. Simulation and analysis of medium-low temperature gasification of sewage sludge based on Aspen Plus[J]. Building Energy & Environment, 2020, 39(8): 11-15.
刘超. 污泥干化焚烧技术经济评估指标体系研究[J]. 给水排水, 2024, 50(3): 38-45.LIU Chao. Research on the technical and economic assessment index system for sludge drying and incineration[J]. Water & Wastewater Engineering, 2024, 50(3): 38-45.