Modeling and Simulation of Industrial Coal Fired Boiler

Abstract

This paper presents the dynamic modeling of 210MW Industrial Coal Fired Boiler which is used commonly in thermal power plants. The goal of developing the first principle model is to capture the key dynamical properties of the boiler over a wide operating range. The model describes the complicated dynamics of the various components of Industrial coal fired boiler such as furnace, boiler drum, primary superheater attemperator and secondary superheater. The model is developed based on the physical principles, and is characterized by a few physical parameters. The parameters are determined from the construction data, and a few of them from the field test data. A strong effort has been made to strike a balance between fidelity and simplicity. From the modeling point of view, the boiler is divided into five subsystems and for each subsystem, the first principle models are developed using the mass and energy balance equations. The subsystem models are then integrated to obtain the integrated boiler model. Simulation studies are carried out based on the nominal values of the system variables and the parameters collected from a power plant. The integrated boiler model obtained is tested for its dynamic and steady state characteristics and the results of which are described. The model is validated against the unique plant data and the results are presented. The model describes the behaviour of the system over a wide operating range. A good agreement is found between the simulation and actual parameters of the boiler.