On October 16, 2017, the Ministry of Science and Technology organized a national science and technology support plan "Energy-saving/ultra-low emission circulating fluidized bed boiler key technology research and development and application" project acceptance meeting in Beijing. From the Institute of Engineering and Heating of the Chinese Academy of Sciences, Huazhong University of Science and Technology, State Electric Power Research Institute, Huadian Electric Power Research Institute, University of Science and Technology Beijing, North China Electric Power University, Chinese Academy of Sciences Process Institute, Beijing Jiaotong University, Xi'an Jiaotong University, Hebei University of Technology, State Power Investment Corporation The acceptance experts listened to the work report of the project and reviewed the acceptance materials. After careful discussion, the expert group believed that the project completed the research tasks specified in the task book and reached the evaluation indicators. The acceptance expert group unanimously agreed to pass the project acceptance.

　　"Energy-saving/ultra-low emission type circulating fluidized bed boiler key technology research and development and application" subordinate two topics.

　　The goal of Topic One is to study the technology to reduce the plant power consumption rate of CFB boilers, improve the boiler thermal efficiency, and achieve ultra-low emissions, and carry out engineering demonstrations. Through the research and development of energy-saving CFB to reduce boiler plant power consumption, improve boiler efficiency, ultra-low SO2 emissions, ultra-low NOx emissions, heavy metal emissions control and other key technologies, an energy-saving/ultra-low emission circulating fluidized bed with independent intellectual property rights has been formed The complete set of boiler technology has been applied to Shanxi Guofeng 300MW and Jiangxi Liwen 135MW circulating fluidized bed boiler projects. The test results of Shanxi Guofeng’s 300MW CFB unit show that the thermal efficiency of the boiler reaches 90.61% under rated load, which is about 1% higher than that of similar units; the plant power consumption rate is 5.695%, which is more than 20% lower than that of similar units; the desulfurization efficiency in the furnace is 82.6%. After semi-dry desulfurization, the emission (converted) is 79mg/m3; when SNCR is not put into operation, the original emission (converted) can be maintained at 50～70mg/m3, and when SNCR is put into operation, it is lower than 32mg/m3.

　　The goal of the second topic is to study the technology of improving combustion and controlling NOx generation when CFB uses refractory coal, and to make technical preparations for timely engineering demonstrations. Through the establishment of a 1MW CFB test bed with an operating bed temperature of 1050℃, the study on the combustion and pollutant emission characteristics of three typical non-combustible coal types of Yangquan coal, Yangcheng coal and Longyan coal during high-temperature combustion has been completed, and the content of fly ash combustibles Reduced by more than 5.79%, NOx emission concentration is less than 500mg/m3; developed furnace oxygenation technology, carried out experimental research and engineering verification of burning anthracite on 4MW hot CFB test bench and 135MW CFB boiler, and the content of fly ash combustibles were respectively Reduced by 8.9% and 2.5%; completed the project design of a high-temperature 600MW supercritical CFB boiler burning Yangcheng coal (dry ash-free base volatile content 7.51%), with a designed operating bed temperature of 970℃, boiler combustion efficiency of 97.91%, and NOx The emission concentration is 400mg/m3, and the minimum non-fuel stabilization load is 30% BMCR.

　　During the research and development process of "Energy-saving/ultra-low emission circulating fluidized bed boiler key technology research and application", the key technology of energy-saving/ultra-low emission circulating fluidized bed boiler was developed and corresponding engineering demonstration projects were established. The project research results are not only my country's coal-fired power generation has made a huge contribution to energy conservation and emission reduction, and it has also significantly improved the international competitiveness of my country's circulating fluidized bed boiler products, which has significant economic benefits and energy conservation and environmental protection benefits.

　　Damage, will the heat dissipation increase after use. The maintenance of the kiln can not only ensure the output and product quality of the kiln, but also prolong the service life of the kiln. Pay attention to the treatment of stagnant water around the kiln. Excessive groundwater and surface water can easily cause foundation softening, reduced ground endurance, changes in kiln structure, and cracks in the kiln body. Keep the kiln with good ventilation conditions. For example, in winter or when it is not in production, all the bad bodies in the kiln should be burnt out and dragged out of the kiln to empty the kiln. With good ventilation conditions, the kiln body should be Will not absorb too much air moisture, and will not cause damage to the kiln when re-ignited. The metal pipes on the kiln are easily oxidized and corroded under high-temperature and high-humidity production. During normal maintenance, they should be inspected in detail and all parts should be treated with anti-corrosion treatment to prevent damage to the normal production of the kiln.