The 75t/h sub- high temperature and sub- high pressure direct-combustion circulating fluidized bed power boiler based on the biomass fuel mixture, developed by the Institute of Engineering Thermophysics, Chinese Academy of Sciences, passed the scientific and technological achievements identification on Sept 16, 2011.
The institute independently developed power generation technology based on direct combustion of biomass fuel was applied in this project. The boiler was designed and manufactured by Changsha Boiler Plant Co.,LTD. The Biomass Power Generation Branch of Zhejiang Changguang Co.,LTD. is the user of this project. Due to the adoption of several technical innovations, many problems which challenged the technology of circulating fluidized bed direct combustion of biomass fuel were solved, such as the fouling and corrosion of the heating surface, the chocking of the bed material, and the blockage of the separator. The boiler has been running smoothly and efficiently with single biomass fuel since its commercial launch seventeen months ago. Every performance index meets the design requirements, and the pollutant emission reaches the national standard. Additionally, sub- high temperature and sub- high pressure was realized in this type of boiler for the first time, resulting in 3 percentage points higher power generation efficiency than the mid-temperature and mid-pressure generation unit.
This identification meeting was jointly hosted by China Machinery Industry Federation and China Electricity Council. The approvals board listened intently to the technical report, the using report from users, the performance testing report, and novelty search report. After full discussion, the approvals board appreciated highly this technology and approved the certification.
This technology has been employed by two users. The two boilers of the first user have been put into commercial operation. The three boilers of the second user are in the manufacturing stage and will be launched commercially in 2012. The installation of the 130t/h high temperature and high pressure circulating fluidized bed boiler, which was developed from this technology, has been completed and it is ready for debug.
