Combustion characteristics and design of hot water boiler

2nd International Conference on Advances in Energy Resources and Environment Engineering

能源学;生态环境科学

Liu, Xuemin^1 ; Yang, Dinghua^2 ; Lu, Junfu^2 ; Guan, Jian^1 ; Qi, Guoli^1

China Special Equipment Inspection and Research Institute, Beijing

100029, China^1

Key Laboratory for Thermal Science and Power Engineering, Ministry of Education, Tsinghua University, Beijing

100084, China^2

关键词: Adhesive force;    Biomass combustion;    Boiler efficiency;    Carbon content;    Char combustion;    Combustion characteristics;    Hot water boilers;    Volatile combustion;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/59/1/012069/pdf
DOI  :  10.1088/1755-1315/59/1/012069

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In order to understand the combustion characteristics of biomass, a detailed comparison with coal was made. There are many differences between biomass and coal in combustion characteristics. The burning rate of biomass is much higher than coal. The burning rate of biomass char is also higher than coal char. During biomass combustion, HCl, SO2and NOxemissions mainly concentrate in volatile combustion stage, while CO2emission mainly concentrates in char combustion stage. The slagging tendency of biomass ash is severer than coal ash and the adhesive force of biomass ash is higher. However, the wearing tendency of biomass ash is minor. Aiming at the particularity of biomass fuels, this paper briefly introduces the design of biomass hot water boilers. On this basis, a 2.8 MW biomass hot water boiler was developed and tested under the loads of 1.7 MW and 2.8MW. The running results show that the carbon content of bottom slag significantly decreases as the load increases. The boiler efficiency is higher than 85% under both loads.