Statistical Analysis Of Coal-Air Ratio Of Medium-speed Coal Mill

Domestic large capacity coal-fired units most uses medium speed mill direct blowing pulverizing system,and the coal mill is the core equipment of coal pulverizing system of boiler equipment,its working condition for the whole unit operation security and economy play an important role.In order to ensure that the quality of the coal pulverizing system control need of coal mill equipment state and fault modes were studied.The existing research results show that the wind coal ratio is the main factors influencing the medium-speed coal mill running status.Power plant is the main task of the combustion control system: to maintain the stability of main steam pressure,maintain the efficiency of combustion process and maintain the stability of the furnace pressure.And ensure the combustion control system of the key factors or coal than the wind.So the wind coal ratio control and optimization for safe operation and economic combustion is an important topic of the coal-fired units.This article mainly from the perspective of statistical analysis,utilizes historical data to build a coal mill unit running state model and the oxygen content in the tail flue.With the help of these models can help crew quickly grasp the current and the wind mill coal than the running state,which have the effect of supplementary control and protection.