基于VB程序设计的选煤厂主要设备效果测评系统

发布时间：2018-06-08 21:53

本文选题：效果测评 + Visual　；参考：《太原理工大学》2015年硕士论文

【摘要】：近几年，煤炭加工企业规模不断扩大的趋势十分明显，各类大型设备不断投入现场运行，同时选煤厂是一种典型的流程式、各工艺环节环环相扣的加工企业，一台设备的故障可能导致大量的连锁反应，最终影响产品质量。现场技术人员难以及时、全面、准确的掌握各环节设备的工作现状和设备动态，无法及时发现问题，不利于科学管理。本文在选煤设备单机检查的基础上，采用VB语言程序对主要设备的效果测评进行系统设计。该系统主要包括以下环节：重介、磁选、脱水及浓缩。主要针对的设备有旋流器、磁选机、加压过滤机、浓缩机，并进一步对以上设备开展效果测评。效果测评系统针对旋流器这一重介设备的测评过程，主要采用过程分析法，利用多环节如分配率及其曲线绘制、错配物及其曲线绘制、可选性曲线绘制过程中的多个指标逐步实现其效能指标的可视化；对于磁选、脱水、浓缩三个环节，分别选取磁选机、加压过滤机、浓缩机三台设备，采用综合分析法，结合多个指标对相应设备进行效能分析。在以上四个环节的结束部分都设有效果分析的功能键，点击即可了解这一环节设备工作效果的测评情况。在系统的结束部分设有综合分析环节，这一环节将上下游相关联设备的效果测评数据进行整合，结合预设指标的判断方式，给出相应分析结论。主要结论如下： (1)旋流器Ep值为0.116；数量效率值为98.15%；δ0.1为17.95%(中等可选)；分选密度δp1下错配物总量m0为5.257％，，等误密度δe1下的错配物总量m0为4.976％。旋流器分选精度的Ep值明显偏高，错配物含量较高，旋流器分选精度低； (2)磁选机磁选效率为83.37%，磁性物回收率为84.08%，混入精矿中煤泥占入料煤泥量为0.71%。磁选机磁选精度较高，但是分选效果不佳，有大量的磁性物随尾矿流失； (3)脱水效率为78.01%，产品水分为20.21%，整体指标较为合理。但滤液水浓度24.59g/L，明显偏高。同时结合小筛分曲线分析，滤饼中粗颗粒物料比例较大，大量细粒物料进入滤液，应注意滤机滤板及滤布的维护与更换； (4)浓缩机浓缩效率96.33%、底流固体物回收率为99.46%，溢流水浓度为0.13g/L，浓缩机整体工作情况良好；本系统利用系统层次分析法，将选煤厂各主要设备归入相应的环节模块，设计更为直观的试验结果呈现方式，实现庞杂数据的自动整合计算，并最终生成报表，解决了选煤厂设备定期单机检查试验数据繁巨，难以处理，同时计算准确性不高，难以指导现场操作的难题，为精细化检修提供了依据。
[Abstract]:In recent years , the expanding trend of coal processing enterprises is obvious , and various large - scale equipment are continuously put into the field operation , and meanwhile , the coal preparation plant is a typical process type , and the fault of one equipment can lead to a large number of chain reactions and finally influence the product quality .

On the basis of single - machine inspection of coal - selecting equipment , the system design is carried out by using VB language program to evaluate the effectiveness of main equipment . The system mainly includes the following steps : heavy - dielectric , magnetic separation , dewatering and concentration . The main aim of this system is cyclone , magnetic separator , pressure filter and thickener .
For the three links of magnetic separation , dehydration and concentration , three equipment of magnetic separator , pressure filter and thickener are selected respectively , and the performance analysis of the corresponding equipment is carried out by means of comprehensive analysis method . At the end of the above four links , the function keys of effect analysis are set up , and the evaluation of the work effect of the equipment in this link will be understood . At the end of the system , the evaluation data of the effect of the equipment in the upstream and downstream are integrated , and the corresponding analysis conclusion is given in combination with the judgment mode of the preset index . The main conclusions are as follows :

( 1 ) the value of swirler is 0.116 ;
the quantity efficiency value is 98.15 % ;
未0.1 is 17.95 % ( medium optional ) ;
The total amount of mismatch in the separation density 未p1 is 5.257 % , and the total amount of the mismatch in the equal error density 未e1 is 4.976 % . The value of the separation precision of the cyclone is obviously higher , the content of the mismatch is high , and the separation accuracy of the cyclone is low ;

( 2 ) the magnetic separation efficiency of the magnetic separator is 83.37 % , the recovery rate of the magnetic substance is 84.08 % , the coal slime mixed in the concentrate accounts for 0.71 % of the coal slime amount , the magnetic separation precision of the magnetic separator is high , but the separation effect is poor , and a large amount of magnetic substances are lost with the tailings ;

( 3 ) The dehydration efficiency is 78.01 % , the water content of the product is 20.21 % , the whole index is reasonable , but the water concentration of the filtrate is 24.59g / L , which is obviously higher .

( 4 ) the concentration efficiency of the thickener is 96.33 % , the recovery rate of the underflow solids is 99.46 % , the overflow water concentration is 0.13 g / L , and the overall working condition of the thickener is good ;

According to the system level analysis method , each main equipment of the coal preparation plant is integrated into the corresponding link module , the design is more intuitive test result presentation mode , the automatic integration calculation of the complex data is realized , and the report is finally generated , so that the problem that the data is large and difficult to handle is solved , and meanwhile , the calculation accuracy is low , and the problem that the field operation is difficult to be guided is difficult to be guided , and the basis is provided for fine maintenance .
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD94;TD672

【参考文献】