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Study On The Mathematical Model Of The Impact Factors Of Turner Based On Efficacy

Posted on:2020-01-17Degree:MasterType:Thesis
Country:ChinaCandidate:H Y LiFull Text:PDF
GTID:2381330602957208Subject:Mechanical Manufacturing and Automation
Abstract/Summary:PDF Full Text Request
The continuous progress of science and technology has brought us a better life,along with the increasing number of wastes such as sewage sludge,which has become the main environmental problems facing our country.According to the national green development strategy,in the field of organic solid waste treatment and disposal,harmless,resource-based and green disposal methods are the primary goals of environmental workers.Aerobic composting,as one of the methods in line with the green concept,is widely used in the treatment and disposal of organic solid waste.Aerobic composting process is the process of recycling organic solid waste through aerobic fermentation of organic matter in materials.In order to ensure the uniformity,porosity,suitable temperature and moisture requirement of the material composting process,it is necessary to flip the material by a dumper to accelerate the maturation of the material and effectively shorten the fermentation period of sludge.Therefore,dumping is a key step in the aerobic sludge fermentation process,and the dumper is t he core equipment in the aerobic sludge composting system.At present,the design of dumper is mainly based on engineering experience data,and the theoretical basis is extremely scarce.In this paper,the reverse engineering thinking and modern analytical methods are adopted to improve the existing theory of dump,focusing on the dump effect and power consumption in the working process of dumper.Firstly,a preliminary mathematical calculation model for the optimization of the efficiency of the dumper is obtained through theoretical calculation and analysis.The primary purpose of the model is to find the minimum power consumption of the dumper.At the same time,in order to ensure the composting time of materials and the utilization rate of the fermentation tunnel bin,the number of dumps and the height of the d umper are taken as constraints.(?)Secondly,through the relevant data collected from field tests,the real relationship between the impact factors and the efficiency of the dumper is determined;the calculated values are verified by the test values,and the error of the power consumption of the dumper is 13.92%~18.34%;the error of the distance of the dumper is 10.49%~12.54%;the error of the height of the dumper is 16.67%~20.00%,and the error analysis is within a reasonable range;the correction coefficient of the moisture content is 0.95 and the correction of the tillage depth are obtained.The coefficient is 0.83.The revised coefficient is substituted into the preliminary mathematical calculation model to obtain the final optimized mathematical model.Finally,the simulation software is used to set the parameters that are consistent with the actual conditions.The error between the simulation value and the calculation value and the test value is 8.81%and 6.34%,respectively.The basic model of the power analysis of the dumper is obtained.Based on the basic model,the overturning power consumption is obtained by changing the value of the impact factor.The results of range analysis and variance analysis confirm that the traveling speed of the dumper is a significant factor affecting the efficiency of the dumper.The purpose of this topic is to optimize the efficiency of the dumper.Through a series of studies,the calculation optimization model of the efficiency of the dumper,the influencing factors of the efficiency of the dumper and the significant factors are obtained.It can lay a foundation for the further optimization of the follow-up dumper,and provide a theoretical basis for the optimal application of dumper under different working conditions,in the face of different technological requirements and different material attributes.
Keywords/Search Tags:dumper efficiency, mathematical model, SPH model, numerical simulation, orthogonal test
PDF Full Text Request
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