袋式除尘器脉冲喷吹清灰实验及其测控系统设计

发布时间：2018-05-03 09:50

本文选题：袋式除尘器 + 脉冲清灰　；参考：《河北工业大学》2015年硕士论文

【摘要】：脉冲清灰是袋式除尘器得以长期稳定运行的关键技术,然而脉冲清灰过程比较复杂,脉冲清灰性能的评价指标还没定论,导致无法准确地衡量清灰效果。因此,需要通过脉冲清灰实验研究,但实验装置设计需要的相关数据也相当缺乏。脉冲清灰实验装置中的各个参数对清灰效果都可能产生影响,设计不合理会导致结果不准确,影响产品的创新研发。因此需要设计一套合理的脉冲清灰装置,搭建脉冲清灰实验系统。为了对清灰实验系统运行设备进行更好的控制与监测,需要设计脉冲喷吹清灰实验的测控系统,目的其一是对实验系统进行自动化控制,并对现场数据进行分析、处理、存储等及对工作状态进行监控;其二是为探讨脉冲清灰机理提供数据等依据,从而提高除尘器的除尘效率并降低除尘器的能耗。本文主要研究内容及成果如下:首先,本文在在广泛阅读国内外相关文献的基础上,分析了脉冲清灰及其实验机理的研究状况,对实验装置的重要参数进行了数值模拟,探讨了实验装置设计的合理性,并据此设计了一套脉冲清灰实验装置,并对脉冲清灰实验方案做了设计。然后,根据脉冲清灰实验的需求,对实验测控系统做了硬件以及软件设计。控制器采用西门子公司的S7-200 PLC(CPU 224XP),用LabVIEW编写了上位机程序,对现场数据进行分析、处理、存储等及对工作状态进行监控。最后,对脉冲喷吹清灰模糊控制技术及其应用做了研究。与传统的定时、定压控制相比,模糊控制能使参数、工况复杂多变的袋式除尘器稳定高效的运行。本文设计了二级二维模糊控制器:1.根据烟气流量与设定值的偏差EQ及其变化率EcQ,模糊推理确定阻力的设定值的修正值△P2;2.根据实际阻力△Pt与目标阻力△P的偏差EP和偏差变化率EcP来模糊推理脉冲间隔时间修正值△T。并用MATLAB的FUZZY工具箱对该模糊控制器进行了仿真,并用Simulink工具箱对该模糊控制系统进行了仿真验证,验证了模糊控制器的先进性与可靠性。
[Abstract]:Pulse ash removal is the key technology for the bag dust collector to run steadily for a long time. However, the process of pulse ash removal is complicated, and the evaluation index of pulse ash removal performance is still uncertain, which makes it impossible to accurately measure the ash removal effect. Therefore, the experimental study of pulse ash removal is needed, but the relevant data for the design of the experimental device are also lacking. Each parameter in the pulse ash removal experimental device may have an impact on the ash removal effect. The unreasonable design will lead to inaccurate results and affect the innovation and development of the product. Therefore, it is necessary to design a set of reasonable pulse ash removal device and build a pulse ash removal experimental system. In order to better control and monitor the operation equipment of the ash removal experiment system, it is necessary to design a measurement and control system for the ash cleaning experiment by pulse injection. The purpose of this system is to automate the control of the experimental system, and to analyze and process the field data. The second is to provide data basis for discussing the mechanism of pulse ash removal, so as to improve the dust removal efficiency and reduce the energy consumption of the dust collector. The main contents and achievements of this paper are as follows: firstly, on the basis of extensive reading of relevant literature at home and abroad, this paper analyzes the research status of pulse ash removal and its experimental mechanism, and simulates the important parameters of the experimental device. The reasonableness of the design of the experimental device is discussed, and a set of experimental device of pulse ash cleaning is designed based on it, and the experimental scheme of pulse ash cleaning is designed. Then, according to the demand of pulse ash removal experiment, the hardware and software are designed. The controller uses S7-200 PLC(CPU 224XPU of Siemens Company, and uses LabVIEW to compile the upper computer program, which can analyze, process, store and monitor the working state of the field data. At last, the fuzzy control technology and its application are studied. Compared with the traditional timing and constant pressure control, fuzzy control can make the bag filter with complex parameters and variable working conditions run stably and efficiently. In this paper, a two-level 2-D fuzzy controller is designed. According to the deviation EQ between the flue gas flow and the set value and its change rate EcQ, fuzzy inference is used to determine the revised value of the set value of resistance (P _ 2 ~ (2)). According to the deviation EP of the actual resistance Pt and the target resistance P and the deviation change rate (EcP), the correction value of pulse interval time is fuzzy. The fuzzy controller is simulated with the FUZZY toolbox of MATLAB and the fuzzy control system is verified by the Simulink toolbox. The advanced nature and reliability of the fuzzy controller are verified.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X701.2

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