倾斜式对喷流除尘效率影响因素的正交实验研究

Study on influence factors of dust collection in gradient impinging stream by orthogonal experimental design

针对水平式对喷流结构会使部分粉尘颗粒黏附在喷嘴对面的器壁上而导致除尘效率降低的问题,采用倾斜式对喷流除尘技术收集硫酸铵和硝酸铵混合物粉尘。对影响除尘效率的5个主要因素:喷嘴速度、含尘浓度、喷嘴水平间距、倾斜角度和喷雾化水润湿含尘气流的耗水量,各作了4个水平的考察,得到了该条件下的最优方案:喷嘴速度26 m/s、含尘质量浓度0.60kg/m3、喷嘴间距0.2 m、倾斜角度40°、耗水量0.21 kg/kg粉尘。实验表明:该条件下的除尘效率最高可达96.8%,而且喷雾化水润湿含尘气流对除尘效率影响最大,倾斜式对喷流能有效避免粉尘颗粒粘附在器壁上。

Based on the decrease of collection efficiency resulted from partial dust particles adhered to the equipment wall opposite the nozzle in horizontal impinging stream,the gradient impinging stream was used to collect blend dust particles of ammonia sulfate and ammonium nitrate.L_(16)(4~5) orthogonal design was utilized to optimize the experimental parameters.The five factors chosen for test are as follows,the nozzle velocity,the dust particles density,the space between two nozzles,gradient angle and the water mass which wets dusty air flow,each with four levels.Experimental results showed the optimal conditions:the nozzle velocity was 26 m/s,the dust particles density was 0.60 kg/m^3,the space between two nozzles was 0.2 m,the gradient angle was 40° and the water mass was 0.21 kg/kg of dust particles.The result of experiment under those conditions shows that the collection efficiency can be the highest one among all the experiments,which can be up to 96.8% and the wetting dusty air flow be the biggest influence factor.And the phenomenon of partial dust particles adhering to the equipment wall can be avoided effectively in gradient impinging stream.