凤凰山矿选煤厂煤泥水处理系统控制方法研究与实现
发布时间：2019-03-23 20:01
【摘要】：煤泥水处理是选煤厂非常重要的工艺环节，其处理效果会直接影响洗水复用与闭路循环的指标，而且对选煤厂其他环节如分选效率、产品的数质量指标等都影响很大，，甚至是制约全厂经济效益和社会效益的个重要系统。 本文以凤凰山矿选煤厂煤泥水处理控制系统为研究对象，针对其控制方式落后、资源浪费等问题，设计了基于PLC与组态软件的煤泥水处理控制系统。该系统采用两套S7-1200PLC和两套S7-200PLC做浓缩机加药控制和底流控制的底层控制器，基于力控Force Control V7.0设计上位机监控软件，并通过以太网组网，实现了各控制器间的互通。 本文根据选煤厂原煤分选以及煤泥水处理系统的工艺流程和现场生产情况，进行煤泥水絮凝沉降试验，将煤泥水入料流量、入料浓度和干煤泥入洗量对絮凝沉降的影响综合起来，研究分析出合理的药剂制度，为药剂的自动添加提供了依据。 在此基础上，进行了系统各部分的软硬件设计，主要包括控制主站的设计、底流控制系统的设计，药剂制备和添加系统的设计以及硬件设备与主从站控制器的通信、主从站与上位机之间的通信。 控制系统采用前馈结合反馈的多策略控制算法实现自动加药的控制，依据药剂制度，分析研究前馈环节中入料流量和入料浓度对加药量的影响，设计前馈环节的控制策略和算法；在反馈环节中引入模糊控制，并通过将煤泥水入料流量和入料浓度对加药量的影响考虑到模糊控制规则中，分析研究反馈环节的控制策略和算法。 最后该控制系统在现场进行安装调试，工业试验运行情况表明，系统各部分数据传输稳定可靠；前馈结合反馈的多策略控制算法能够有效的将溢流水浊度控制在合理的范围内，保证了煤泥水处理系统的稳定运行，减少了人工投入，降低了运行成本，节省了药剂的消耗，提高了企业的经济和社会效益。
[Abstract]:Sludge water treatment is a very important process in coal preparation plant, and its treatment effect will directly affect the indicators of washing water reuse and closed circuit circulation, and has a great impact on other links of coal preparation plant, such as separation efficiency, product number and quality indicators, and so on. Even an important system that restricts the economic and social benefits of the whole plant. This paper takes the coal slurry water treatment control system of Fenghuangshan Coal preparation Plant as the research object and designs the coal slurry water treatment control system based on PLC and configuration software to solve the problems of backward control mode and waste of resources. The system adopts two sets of S7-1200PLC and two sets of S7-200PLC as the bottom controller of dosing control and underflow control of concentrator. Based on the force-controlled Force Control V7.0, the upper computer monitoring software is designed, and the interworking of the controllers is realized through Ethernet network. According to the process flow and field production of raw coal separation and sludge water treatment system in coal preparation plant, the flocculation and settlement test of coal slime water was carried out, and the feed flow of coal slurry water was carried out. The effects of feed concentration and the amount of dry coal sludge on flocculation settlement are combined to study and analyze the reasonable medicament system, which provides a basis for the automatic addition of medicament. On this basis, the hardware and software design of each part of the system is carried out, including the design of the control master station, the design of the underflow control system, the design of the pharmaceutical preparation and addition system, and the communication between the hardware equipment and the master-slave station controller. Communication between master and slave station and upper computer. In the control system, the multi-strategy control algorithm of feedforward and feedback is adopted to realize the automatic dosing control. According to the medicament system, the influence of the feed flow rate and the feed concentration in the feedforward link on the dosing amount is analyzed and studied. Design the control strategy and algorithm of feedforward link; The fuzzy control is introduced into the feedback link, and the control strategy and algorithm of the feedback link are analyzed and studied by taking into account the effect of feed-in flow rate and feed-in concentration on the dosing amount of coal slime water into the fuzzy control rule. Finally, the control system is installed and debugged on the spot. The operation of the industrial test shows that the data transmission of each part of the system is stable and reliable. The multi-strategy control algorithm based on feedforward and feedback can effectively control the overflow turbidity within a reasonable range, ensure the stable operation of the coal slurry water treatment system, reduce the manual input, reduce the operation cost, and save the consumption of chemicals. Improve the economic and social benefits of the enterprise.
【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
本文编号：2446180
[Abstract]:Sludge water treatment is a very important process in coal preparation plant, and its treatment effect will directly affect the indicators of washing water reuse and closed circuit circulation, and has a great impact on other links of coal preparation plant, such as separation efficiency, product number and quality indicators, and so on. Even an important system that restricts the economic and social benefits of the whole plant. This paper takes the coal slurry water treatment control system of Fenghuangshan Coal preparation Plant as the research object and designs the coal slurry water treatment control system based on PLC and configuration software to solve the problems of backward control mode and waste of resources. The system adopts two sets of S7-1200PLC and two sets of S7-200PLC as the bottom controller of dosing control and underflow control of concentrator. Based on the force-controlled Force Control V7.0, the upper computer monitoring software is designed, and the interworking of the controllers is realized through Ethernet network. According to the process flow and field production of raw coal separation and sludge water treatment system in coal preparation plant, the flocculation and settlement test of coal slime water was carried out, and the feed flow of coal slurry water was carried out. The effects of feed concentration and the amount of dry coal sludge on flocculation settlement are combined to study and analyze the reasonable medicament system, which provides a basis for the automatic addition of medicament. On this basis, the hardware and software design of each part of the system is carried out, including the design of the control master station, the design of the underflow control system, the design of the pharmaceutical preparation and addition system, and the communication between the hardware equipment and the master-slave station controller. Communication between master and slave station and upper computer. In the control system, the multi-strategy control algorithm of feedforward and feedback is adopted to realize the automatic dosing control. According to the medicament system, the influence of the feed flow rate and the feed concentration in the feedforward link on the dosing amount is analyzed and studied. Design the control strategy and algorithm of feedforward link; The fuzzy control is introduced into the feedback link, and the control strategy and algorithm of the feedback link are analyzed and studied by taking into account the effect of feed-in flow rate and feed-in concentration on the dosing amount of coal slime water into the fuzzy control rule. Finally, the control system is installed and debugged on the spot. The operation of the industrial test shows that the data transmission of each part of the system is stable and reliable. The multi-strategy control algorithm based on feedforward and feedback can effectively control the overflow turbidity within a reasonable range, ensure the stable operation of the coal slurry water treatment system, reduce the manual input, reduce the operation cost, and save the consumption of chemicals. Improve the economic and social benefits of the enterprise.
【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
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