Design And Application Of Burning Control System For Biomass Power Plant

With the rapid development of China’s economy,more and more energy are demanded.Conventional energy such as coal,oil and natural gas can not meet the needs of mankind,while the environment has been seriously polluted because of the extensive use of these fuels.so people begin to focus on resource-rich,renewable and environmentally friendly biomass resources.Currently,the burning power generation of biomass is one of the main methods in using biomass energy,and the most well-developed and widely-used technology.Because of the complexity of the mechanism and resultants of biomass burning,there are many control problems that need advanced design.In this paper,Qinhuangdao National Energy biomass cogeneration power plant is selected as an example.The main process equipment and corresponding design parameters of the boiler are introduced in detail,and the working process such as the boiler smoke system feeding system and so on that is closely related to the boiler combustion control system are analyzed.The comparison between the biomass direct combustion boiler and the conventional coal-fired boiler was carried out from three angles: combustion mode,preheating method and combustion product.Based on the analysis of the combustion control of the boiler,the similarities and differences between the combustion control of the biomass boiler and the combustion control of the coal-fired boiler are compared and analyzed.The design and logic design of the main combustion control links,such as feeding system,air supply system and furnace exhaust control,are carried out,and the design scheme is evaluated and analyzed.LN2000DCS is used to complete the on-site commissioning of control scheme of biomass boiler combustion system.According to the actual operation experience,the problems and shortcomings of the current boiler combustion control system in the grate cycle,feeding control,boiler air leakage and grate coking are pointed out,and the specific adjustment scheme is given to ensure that the biomass The boiler is safe and stable in optimum combustion conditions.