Fractal Characteristics Of Slagging And Fouling In The Course Of Circulation Fluidized Bed Running

Circulating fluidized bed boiler developed to be a new furnace in recent years. As a new type of high efficiency and low pollution technology, it has been widely used at home and abroad. In order to ensure safe and economizing energy of boiler, nowadays boiler workers always focus on boiler heating surface external process, that is, the effect of combustion production to boiler heating surface. But as boiler becomes large and biomass is applied as new development fuels, fluidized bed boiler fouling encountered universal harm of slagging and fouling. This paper, adopting new perspective and research methods, studies the slagging and fouling process and form of circulating fluidized bed boiler, and does specific analysis from the following four aspects: First of all, analyzes the mechanism and impact factors of fluidized bed slagging, compares the impact of different operating parameters on slagging and fouling in mathematical modeling and practical engineering, and analyzes the advantages and disadvantages of mathematical model generally used in engineering; Secondly, based on diffusion and limited aggregation model, simulates and analyzes the process of ash particles agglomeration and growth in the furnace; Thirdly, modeling and simulates the process of fuel and ash particles fouling and slagging in heating surface, and analyzes simulation results; Fourthly, using IFS (IFS) method, establishes mathematical model of the structure of fouling and slagging, and analyzes its dynamics process.This paper puts forward new viewpoints and methods in analyzing and solving the problem of circulating fluidized bed fouling and slagging, that is, using fractal theory simulates and analyzes fouling and slagging growth process of ash particles agglomeration and heating surface, and proposes establishing iteration system model to study and simulate the structure of fouling and slagging. Using this new method, simulation achieves desired results. The biggest achievement of this paper is using fractal theory for analyzing and modeling fouling and slagging process, especially using MATLAB language for compiling computer program to simulate the formation process and characteristics of particle cohesion, dynamic growth process of fouling and slagging on heating wall, and using IFS to establish mathematical model of the structure of fouling slagging, these three aspects are creative achievements of this paper. Finally, analyzes intending research orientation and the prospects of the application of fractal theory in fluidized bed boiler combustion process.