水泥混凝土搅拌站配料工艺的研究

发布时间：2018-06-07 08:30

本文选题：水泥混凝土搅拌站 + 输送工艺　；参考：《长安大学》2015年硕士论文

【摘要】：水泥混凝土搅拌站广泛应用于我国工业、农业、交通、国防、水利、市政等建设工程中,需求量在不断增大。国内混凝土搅拌设备虽然在借鉴国外产品基础上不断创新进步,技术水平逐步提升,但就整个搅拌站而言,配料工艺的研究尚且不足,尤其对于新建的混凝土搅拌站而言,往往依赖配套厂家多年积累的经验,基本满足国家标准对混凝土搅拌站的质量要求,并没有对其输送工艺、投料工艺等进行专门的实验研究。由于混凝土搅拌站结构复杂,对于整站匹配进行实验研究相对费时费力,因此本文结合生产实际,利用EDEM离散元仿真软件对混凝土搅拌站配料输送工艺、投料工艺对搅拌质量及搅拌效率的影响分别进行仿真分析。通过理论分析及仿真分析,对上述配料工艺进行探究:对骨料配料机水平输送工艺进行理论分析,并提出较为合理的输送工艺,并通过仿真模拟的手段进行验证,证明改进后工艺在相同的条件下优于改进前的工艺;对于投料工艺,国内外学者往往将重心放在投料顺序、投料方式上,本文重点探究物料投料位置对搅拌初期混合料均匀性及投料过程中搅拌阻力影响,从搅拌质量及能耗方面对其进行客观评价,并对集中投料式粉料投料口进行改进,通过仿真分析证明了粉料投料位置及撒布面积对粉料搅拌均匀性有较大影响。论文对三种主机完全相同,配套系统略有差异的混凝土搅拌站进行了现场的时序测试并提出改进措施,对生产时序重新进行测试调整,并对生产出的混凝土进行测试对比。本文首次将EDEM软件应用在混凝土搅拌设备上,为混凝土搅拌设备的结构及工艺优化设计提出了新的方法。
[Abstract]:Cement concrete mixing stations are widely used in industrial, agricultural, transportation, national defense, water conservancy and municipal construction projects in China, and the demand is increasing. Although domestic concrete mixing equipment is continuously innovating and improving on the basis of drawing lessons from foreign products, the technology level is improved step by step, but the research on batching technology is still insufficient, especially for the newly built concrete mixing plant. It often depends on the experience accumulated by the supporting manufacturers for many years and basically meets the quality requirements of the national standards for concrete mixing stations. There is no special experimental study on its conveying technology and feeding technology. Because the structure of concrete mixing station is complex, it is time-consuming and laborious to study the whole station matching, so this paper uses EDEM discrete element simulation software to carry out proportioning transportation technology of concrete mixing station. The effects of feeding process on agitation quality and agitation efficiency were simulated and analyzed respectively. Through theoretical analysis and simulation analysis, this paper probes into the above proportioning technology: carries on the theoretical analysis to the aggregate batching machine horizontal transportation craft, and proposes the more reasonable transportation craft, and through the simulation means carries on the verification, It is proved that the improved process is better than that before the improvement under the same conditions. For the feeding process, scholars at home and abroad tend to focus on the feeding sequence and the feeding mode. This paper focuses on the influence of material feeding position on mixture uniformity and mixing resistance in the initial stage of mixing, evaluates it objectively from the aspects of mixing quality and energy consumption, and improves the centralized feeding nozzle. It is proved by simulation analysis that the mixing uniformity is greatly affected by the powder feeding position and the distribution area. In this paper, three kinds of concrete mixing stations with the same mainframe and slightly different matching systems are tested and improved, and the production timing is adjusted again, and the concrete produced is tested and compared. In this paper, EDEM software is applied to concrete mixing equipment for the first time, and a new method for the structure and process optimization design of concrete mixing equipment is proposed.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU642

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