Bio-oil Burner Design And Nozzle Atomization Characteristics Simulation Research

With the rapid development of economic and social, the pressure from the ownership of t-raditional fossil fuel and environment becomes more and more significant. So people’s demand for highly quality green energy becomes particularly urgent. As an emerging renewable energy, bio-oil has got the attention of governments around the world in order that the production and refining for bio-oil got the fully development, because of its peculiarity such as high energy density, stored and transported easily, green and environmental combustion products and so on. So it must be great significance for alleviating the pressure and environment all over the world to realize the maximize use of bio-oil.This paper is based on national863scientific research item’ Skewed-slot Low Energy Fine Control Heating of Bio-mass Bio-oil by Flash Pyrolysis and Hybrid Emulsion Fuel New Technology’. According to the bio-oil produced by the Northeast Forestry University Bio-mass Energy Engineeing Technology Centeras samples, it research and design a bio-oil burner whose rated power is2000kW, and efficiency is more than90%, applicable to industry. This paper researches the physical and chemical properties and combustion characteristics of bio-oil deeply. It identifies the burner’s power, in drawing up the premise of fuel injection. It could divide burner into various system components, and respectively on the detailed design calculation. At last we apply Fluent software to simulate the working condition of the simulation, and verify the feasibility of design theory.This paper makes up for the lack of theoretical aspects of bio-oil combustion with detailed combustion calculation. Combustion air volume is6.37m3/kg. Combustion flue gas volume is6.23m3/kg. Combustion temperature is1840℃. It makes the design theory that double parallel type fuel injection nozzle and designs an air distribution device which can meet bio-oil fuel combustion air volume. It chooses the belts drive as the main transmission way for burner. Based on the jet theory, it designs a diffuser type combustion chamber whose diameter is260mm and finishes tmodeling bio-oil burner with Proe. It also discussed the effect of aerosol on atomizing characteristics, and summed up that the high viscosity as bio-oil must use high pressure air as the atomizing to achieve good atomization effects. The paper makes the volume distribution, velocity and pressure distribution nephogram, and atomized droplet velocity is30.9m/s.This paper makes the foundation for the burning market production equipment, with modeling bio-oil burner Pro/e and atomizing nozzle Fluent simulation. The burner design theory for bio-oil burner is the first exploration, to provide a theoretical reference for the development of Step2products in the combustion equipment, greatly enriched the application for bio-oil. It is important significance to ease Chinese oil pressure.