【摘要】 以脱炭效率指数为响应值,通过Design-Expert设计和优化了粉煤灰摩擦电选脱炭试验。利用其中的Box-Behnken试验设计方案,建立了脱炭效率与各个试验因素(进风风速、摩擦轮转速、矫正流风速、极板电压、收集室风速及收集室宽度)之间的二次方修正模型,得出了不同变量对脱炭效率指数的二阶交互影响作用的响应曲面,深入分析了变量间的交互影响关系。以脱炭效率为优化指标,目标为其最大值,得到最佳试验条件:当进风风速3.7 m/s、摩擦轮转速5 150 r/min、矫正流风速1.8 m/s、极板电压40 kV、炭中灰3个产品收集室风速1.0,1.5,1.5 m/s、炭中灰3个产品收集室宽度2,1,3 cm时,脱炭效率可达128.51%,预测值与实测值吻合度较好。更多还原

【Abstract】 The triboelectrostatic beneficiation tests of fly ash were designed by Design-Expert friction based on decar-burization efficiency index. Quadratic model between the decarburization efficiency and test factors was established bythe test of the Box-Behnken design scheme. The test factors were in-flow velocity,friction wheel speed,correct flowwind speed,plate voltage,collection chamber wind speed and collection chamber width. The response surfaces of sec-ond order interaction between different variables on the decarburization efficiency were obtained and the interaction re-lationships between variables were analyzed. Decarburization efficiency was used as the optimization index to get itsmaximum value. The optimal decarbonization effect,decarburization efficiency of 128. 51%,is obtained when the in-flow velocity is 3. 7 m/ s,friction wheel speed is 5 150 r/ min,correct flow wind speed is 1. 8 m/ s,plate voltage is40 k V,collection chamber wind speed is 1. 0,1. 5,1. 5 m/ s and collecting chamber width is 2,1,3 cm. The predictedvalue based on the model is close to the test value.更多还原