Numerical And Experimental Study On Fluid-Particle Two Phase Low Pressure Rotating Spray Nozzle

The spray nozzle application scope nearly contains all industries domain, the transportation, the agricultural production, as well as people's daily life. the spray nozzle also has the wide application on the non- burning industrial equipment except people's knowing of fuel-burning equipment and the equipment that burn each kind of fuel (gas, liquid and solid fuel). Combustion equipments contain: Industry stove, internal-combustion engine power unit, steam power unit, gas turbine and so on. non- fuel-burning equipment for example: Spray drying, the superficial cleaning up and spurts spreads in the installment, the powder metallurgy technology of the steel and iron production, the installment of the agricultural chemicals sprays, the nanometer material preparation installment and so on, which all cannot leave the spray nozzle application.In the power plant and in trash burning down factory, the semi-dry process haze desulphurization craft involves nearly without one exception to the spray nozzle. The stove spurting the calcium rear part humidification desulphurization craft and the circulation fluid bed desulphurization craft must use the spray nozzle to increase the haze humidification. The lime white spray nozzle is the core part of drying haze desulphurization installment, which has the significant influence to the haze desulphurization. The lime white is one special medium, comparing with water and oil, it is the fluid - solid suspension, which contains the bigger solid particle , at the same time , it is also serious to the spray nozzle attrition, whose density and the viscosity are big, even its atomization is more difficult, and it has corrosiveness. Therefore it must set a higher request to the lime white spray nozzle. The optimization to the spray nozzle organization and the atomization characteristic has the extremely vital significance.This article will aim at designing low pressure rotating atomized nozzle to achieve the semi-dry process desulphurization requirement. Using the numerical simulation and the experimental to study the flowing and the frication condition of the spray nozzle. At the same time, we can also optimize the spray nozzle. The results indicated that: the most important affects to the spray nozzle frication characteristic is the spray nozzle tangential channels and the spin chamber tapering section, in which spray nozzle resistance will depress to the smallest when using 4 tangential channels with 6 degree angles; The spin chamber length is 1.5mm; contraction angle 90o is better; length of orifice hole is 1.6mm; D/do=4～6.5; D/b=6～8; L/b=3～4. Moreover this article has...