Co-combustion kinetics and pollutant emission characteristics of sludge and coal slime

被引：0
|
作者：
Xu X. [1 ]
Zhong W. [1 ]
Chen X. [1 ]
Zhou G. [1 ]
Xu Y. [1 ]
机构：
[1] Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing
来源：
Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2022年 / 52卷 / 01期
关键词：
Co-combustion; Coal slime; Kinetics; Pollutant emissions; Sludge;
D O I：
10.3969/j.issn.1001-0505.2022.01.004
中图分类号：
学科分类号：
摘要：
To grasp the kinetics and pollutant emission characteristics of sludge(SS) and coal slime(CS) co-combustion, the basic combustion kinetics characteristics of sludge, coal sludge and their mixture were studied by a thermogravimetric analyzer, and an experimental system of co-combustion of sludge and coal slime was established to study the emission rules of pollutants (SO2, NO and HCl) from co-combustion of sludge and coal slime with different sludge mass fractions (0 to 100%), temperatures (800 to 950 ℃) and moisture contents (0 to 20%). The results show that with the increase of the sludge mass fraction, the ignition performance of the blended fuel is improved and the activation energy is decreased. The combustion characteristic parameter S is the highest when the sludge mass fraction is 25%; with the increase of sludge mass fraction, SO2 and NO emissions first increase and then decrease, while HCl emissions increase; with the increase of combustion temperature, the emissions of SO2 and HCl increase, while the emissions of NO decrease; with the increase of moisture content, SO2 and NO emissions decrease, while HCl emissions increase. Under the experimental conditions, the most suitable conditions for the co-combustion of sludge and coal slime are a sludge mass fraction of 25%, 800 ℃ and a moisture content of 20%. © 2022, Editorial Department of Journal of Southeast University. All right reserved.
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页码：25 / 33
页数：8
相关论文
共 31 条
  • [1] Li L Q, Li M, Su N D, Et al., Research progress of coal slime drying technology, China Energy and Environmental Protection, 42, 9, pp. 128-134, (2020)
  • [2] Qin S Y, Wang D D., Analysis on the current situation of sludge treatment and disposal in urban sewage treatment plants in China, Chemical Industry Management, 15, pp. 49-50, (2020)
  • [3] Wang Q., Analysis of the current situation and development of municipal sludge treatment, Green Building Materials, 6, pp. 71-73, (2020)
  • [4] Werle S, Wilk R K., A review of methods for the thermal utilization of sewage sludge: The Polish perspective, Renewable Energy, 35, 9, pp. 1914-1919, (2010)
  • [5] Pradel M., Survey data of sewage sludge treatment and disposal routes originated from activated sludge water treatment in France, Data in Brief, 26, (2019)
  • [6] Zhou G L, Gu Y F, Yuan H R, Et al., Selecting sustainable technologies for disposal of municipal sewage sludge using a multi-criterion decision-making method: A case study from China, Resources, Conservation and Recycling, 161, (2020)
  • [7] Wang Y G, Liu Y, Yang W J, Et al., Evaluation of combustion properties and pollutant emission characteristics of blends of sewage sludge and biomass, Science of the Total Environment, 720, (2020)
  • [8] Liu H D, Xu G R, Li G B., Pyrolysis characteristic and kinetic analysis of sewage sludge using model-free and master plots methods, Process Safety and Environmental Protection, 149, pp. 48-55, (2021)
  • [9] Zhang W Y, Wang J Q, Liu Y, Et al., Blending effect of municipal sludge on Yangquan coal combustion performance and pollutant release characteristics, Electric Power Science and Engineering, 34, 9, pp. 26-31, (2018)
  • [10] Yang R L, Ma C, Chen G Y, Et al., Study on NO<sub>x</sub> emission during corn straw/sewage sludge co-combustion: Experiments and modelling, Fuel, 285, (2021)
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