The Mathematical Model And Theoretical Analysis Of The Single Oil Silt Particle Combustion

The oil silt is the hazardous waste which is generated during the process of oil extractionand processing, but it is also valuable secondary resources. At present, China’s annual outputof oil silt is nearly one million tons, which has caused tremendous pressure over normalproduction of oilfield and environment. There are no mature and perfect techniques to processoil silt now. Looking for an efficient, fast, low-cost, large-scale scientific and effectiveapproach would be of great significance for the environment protection, and the constructionof a harmonious relation between human and nature.After analyzing the main approaches and technical progress of oil silt processing, thispaper makes and research on the oil silt combustion process on the level of single-particle. Bysearching information, the author summarizes the basic characteristics and fuel properties ofthe oil silt, analyzes the combustion process of oil silt, and establishes a mathematical modelof the single oil silt particle combustion, and develops C language program, simulates thecombustion process of the single-particle oil silt, and carries out an analysis of factors whichinfluence the combustion process of the single particle of oil silt.Based on the simulation results we can find that there are no clear boundaries among thethree oil silt burning stages (rapid preheating in the furnace, the evaporation of water andcrude oil, the combustion of oil steam). The particle diameter and water content of oil siltparticles, furnace temperature, oxygen concentration all have significant impacts on theburning rate of the single-particle of oil silt. With the particle diameter increasing, the burningrate decreases, and the combustion becomes more incomplete. The higher the moisturecontent is, the longer the oil silt burns, which often results in instable combustion in boiler,insufficient output, and even the shut down of the furnace. The furnace temperaturedetermines whether the oil silt can burn completely. In order to ensure complete combustionof the oil silt, typically, it is necessary to burn the oil silt with other fuels of high heat value ina blend way. The higher the oxygen concentration is, the more easily it would burn. Toguarantee a certain excess air coefficient, increasing oxygen concentration of the furnace isanother important condition for complete combustion of oil silt particles.