Development Of Simulation Platform Based On CFD Simulation Of Physical Field In The Power Plant Coal-powder Boiler

In recent years,energy saving and emission reduction in the power industry has been highly valued by the government and all sectors of society.To achieve high-efficiency and low-pollution production in the coal-fired power plant,it is a significant method to improve the energy conversion efficiency and equipment operation level of the pulverized coal boiler.However,the complexity of the physicochemical process of fuel combustion has made the internal operation of the boiler furnace for long-term lack of real-time,accurate and comprehensive information acquisition methods,which has greatly hindered the development of coal combustion clean conversion technology.CFD simulation is an effective way to obtain the physical field data in the furnace through numerical simulation of high-performance computers.It has been promoted in the design and renovation of power plant boilers.However,the practical application function of CFD software is designed for common use and not convenient enough for specific purpose.Therefore,the development of a simulation platform dedicated to the numerical simulation of pulverized coal boilers is of great significance for mentoring the efficient and clean operation of coal-fired power plants.To begin with,this paper establishes a geometric model for the 300 MW pulverized coal fired boiler of a cogeneration unit,and generates mesh with block-structured grid in ICEM software.The overall mesh quality of the boiler is 0.89 on average,which means it is moderately high.Then we select proper mathematical models according to the materialization process involved in the tangentially coal-fired boiler,and make use of Fluent to simulate it.By taking the operating data extracted and processed from DCS as input conditions and parameters,the simulation results under actual working conditions are obtained.Then the simulation values of furnace outlet parameters under each working condition are compared with the operation data in DCS,in order to verify the result.The contrast verification shows that the relative deviation between the boiler outlet parameter of simulation calculation and the corresponding working condition data collected by the DCS is less than 10%,which is within the acceptable range of engineering application.Based on the simulation calculation of this pulverized coal furnace,the overall framework of the boiler simulation platform with four working layers was established by using MVC design architecture in the software engineering environment provided by VS2012.The program code of the platform interface was written by MFC application framework,and the secondary development function of Fluent and Tecplot was combined to further develop the power plant boiler simulation platform.The platform is designed for the simulation analysis of common power station boilers,especially the physics field of coal-fired boilers.It can simulate and calculate various physical fields under different operating conditions and actual conditions,and meet the need of on-line detection and acquisition of physical field information for boilers.The simulation research work in this paper provides a reliable and easily accessible data source for the establishment of the physical field database.At the same time,it also proposes the preliminary construction plan of the physical field database,which is the main direction of the next research work.