畜禽粪污固液分离机断齿螺旋脱水装置运行参数优化

发布时间：2018-03-17 22:04

本文选题：机械化　切入点：优化　出处：《农业工程学报》2017年02期 　论文类型：期刊论文

【摘要】：固液分离是畜禽粪便后续处理利用的重要环节,针对现有固液分离机处理高浓度粪污混合物存在效率低、分离效果差等问题,该文设计了一种断齿螺旋脱水装置,以高浓度猪粪为试验对象,采用Box-Benhnken中心组合试验对断齿螺旋脱水装置的工作参数进行了优化试验,以螺旋转速、间断距离、配重位置为影响因素,以分离效率和挤出物含水率为目标函数,建立了影响因素与目标函数之间的多元数学回归模型。通过试验并结合生产实际,最终获出最佳工作参数组合为:间断距离37 mm,转速56 r/min、配重块处于配重杆309 mm位置处(相对位置),此时分离效率为5.43 m3/h,挤出物含水率为53.52%,试验结果与理论优化值间的误差小于10%,最优参数组合下固体回收率实测值为54.91%,表明该文得出的多元数学回归模型与真实值间的拟合度较高,可为高浓度粪污混合物固液分离机的设计与应用提供参考。
[Abstract]:Solid-liquid separation is an important link in the subsequent treatment and utilization of livestock and poultry feces. In view of the problems of low efficiency and poor separation effect in the treatment of high concentration fecal waste mixture by the existing solid-liquid separator, a screw dehydration device with broken teeth is designed in this paper. Taking high concentration pig dung as the experimental object, the working parameters of the screw dewatering device with broken teeth were optimized by Box-Benhnken central combination test. The helical rotation speed, discontinuous distance and counterweight position were taken as the influencing factors. Taking the separation efficiency and moisture content of extrudate as the objective function, a multivariate mathematical regression model between the influencing factors and the objective function was established. The optimum working parameters were obtained as follows: discontinuous distance 37 mm, rotational speed 56 r / min, weight distribution block at 309 mm position of counterweight rod (relative position), separation efficiency 5.43 m3 / h, moisture content of extrusion material 53.52%. Test results and theoretical optimization value. The error is less than 10 and the measured solid recovery value is 54.91 under the optimal parameter combination, which indicates that the fitting degree between the multivariate mathematical regression model and the real value is higher. It can provide reference for the design and application of solid-liquid separator for high concentration fecal waste mixture.
【作者单位】：农业部南京农业机械化研究所;安徽农业大学工学院;
【基金】：农业部公益性行业科研专项项目(201403019) 江苏省自然科学基金(BK20151073)
【分类号】：X713;S817

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