畜禽粪污固液分离机断齿螺旋脱水装置运行参数优化  

Operation parameter optimization of interrupted-whorl screw dewatering device of solid-liquid separator for livestock and poultry manure

作　　者：赵维松 朱德文[1] 宗文明[2] 谢虎[1] 曹杰[1] 韩柏和[1] 李瑞容[1] 曲浩丽[1] Zhao Weisong Zhu Dewen Zong Wenming Xie Hu Cao Jie Han Baihe Li Ruirong Qu Haoli(Nanjing Research Institute of Agricultural Mechanization, Ministry of Agriculture, Nanjing 210014, China School of Engineering, Anhui Agricultural University, Hefei 230036, China)

机构地区：[1]农业部南京农业机械化研究所,南京210014 [2]安徽农业大学工学院,合肥230036

出　　处：《农业工程学报》2017年第2期25-31,共7页Transactions of the Chinese Society of Agricultural Engineering

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)

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。With the rapid development of intensive livestock and poultry industry, a large amount of livestock and poultry manure is produced every year in China, which will pollute the environment if not treated properly. Chinese government carries out the environmental impact assessment for these enterprises every year, and develops strict policy to restrain the waste discharge. Solid-liquid separation is an important procedure for the follow-up comprehensive utilization of livestock manure. The existing solid-liquid separation equipment has the disadvantage of low efficiency and poor effect when processing high-concentration fecal sewage mixture. This paper designed a new type of interrupted-whorl screw solid-liquid separator with the purpose of efficiently carrying out the solid-liquid separation of high-concentration sewage, improving the separation efficiency, and producing less additional sewage. As one of the key components of the separation device, interrupted-whorl screw was designed and it includes three components, i.e. feeding section, extrusion section and discharge section. To enhance feeding capacity, continuous screw was used for the feeding section. The extrusion and discharge sections adopt the interrupted-whorl screw. The screw pitch of feeding section is 140 mm, and those of the extrusion and discharge sections are 160 mm. With high-concentration pig manure（total solid concentration 21.18%） as experimental object, this study investigated the optimization of operating parameters on self-made screw extrusion separation test bed. The Box-Behnken design method was adopted in the operating parameter optimizing experiment of the Interrupted-whole screw dewatering device. The spindle speed of screw, gap distance, and counterweight position were taken as the influencing factors, and the separation efficiency and filter cake moisture content were selected as the responsive variables in the experimental study. The quadratic regression orthogonal experiment of 3 factors and 3 levels was designed; by using the

关 键 词：机械化 优化 模型 高浓度 粪污 断齿螺旋 挤压脱水 

分 类 号：S817.9[农业科学—畜牧学]