Experimental Study And Numerical Simulation On Combustion Of Synthetic Fuel Oil

With the rapid development of the Chinese economy, the demand for oil is increasing. Diesel oil has been used in boiler, however, due to the shortage of fuel oil and the increasing international oil price, oil costs have become the main expenditure in boiler operation. In order to reduce the costs of production and provide power to enterprises in a more competitive manner, this paper presents research on the use of low-cost synthetic fuel oil substituting for diesel oil ignition. The main points are as follows:Through experimental research, a method for preparation of synthetic fuel oil was determined. Several types of synthetic fuel oil with different water content were made according to this method. The relationships between viscosity of synthetic fuel oil and changes in water content and temperature were obtained by analyzing experimental results. The factors relating to the stability of synthetic fuel oil were discussed. A platform for ignition experiments on synthetic fuel oil was set up. Using this platform, the ignition experiments were successfully performed.Based on the prototype of an industrial boiler, a three-dimensional numerical simulation of combustion of synthetic fuel oil in the boiler was conducted with the computational fluid dynamics software (Fluent). In the simulation, the non-premixed combustion model, the realizable k-epsilon viscous model, P1 radiation model, particle trajectory model and atomization model were adopted. The distribution of temperature field and velocity field in the boiler were plotted from the data of calculation, and the highest tempeture is 1374K. By comparing data from industrial application and numerical simulation, the relative error was found to be less than 10%.Combustion experiments with the synthetic fuel oil were carried out and the related parameters were tested in industrial boilers. In the combustion experiments, the stability of the combustion flame with synthetic fuel oil was observed. Moreover, data on the boiler combustion efficiency and exhaust gas emissions were obtained. The economical efficiency of ignition with synthetic fuel oil and diesel oil was analyzed. The company can save at least 332 thousand yuan in the boiler ignition every year.