热电厂氨气监测系统设计

发布时间：2018-07-05 01:00

本文选题：氨气监测 + 热电厂　；参考：《哈尔滨理工大学》2017年硕士论文

【摘要】：氨气是一种在工业生产中应用广泛的化工有毒原料,和氧气混合后容易爆炸。在工业环境中,由于管理不到位、设备老化、管道腐蚀损坏、阀门松动等原因,导致的氨气泄露,会触发一系列严重的安全事故。因此,实时监测氨气泄漏很重要。本文以山东某热电厂为背景,调研分析热电厂存在的弊端,设计了一种适合热电厂的氨气监测系统。本文结合热电厂的工程背景确定了监测系统的总体设计方案,由监测终端,无线传输,监测中心系统软件构成。课题选择了MQ137氨气传感器,设计了传感器信号拾取电路,信号调理电路,经过A/D转换后送至MSP430F149处理器,通过数据分析与处理获得氨气浓度数据。在此基础上,将氨气浓度数据通过无线传输的方式送至监控中心。设计了氨气浓度监测数据管理系统软件,在数据库中存储氨气浓度数据,具有实时氨气浓度曲线显示、阈值报警、历史数据查询等功能。在对数据分析时引入层次分析法,对多点报警进行决策分析,更好的满足现场监测的需求。该系统不仅可以满足热电厂氨气监测的工程需求,而且对于其它工程领域内氨气监测也具有参考价值,具有良好的市场应用场景。
[Abstract]:Ammonia is a kind of toxic chemical raw material which is widely used in industrial production. It is easy to explode after mixing with oxygen. In the industrial environment, ammonia leakage caused by improper management, aging equipment, pipeline corrosion and valve loosening will trigger a series of serious safety accidents. Therefore, it is important to monitor ammonia leakage in real time. Based on the background of a thermal power plant in Shandong province, this paper investigates and analyzes the disadvantages of the thermal power plant, and designs a monitoring system of ammonia gas suitable for the thermal power plant. Combined with the engineering background of the thermal power plant, the overall design scheme of the monitoring system is determined in this paper, which is composed of the monitoring terminal, wireless transmission and monitoring center system software. The MQ137 ammonia sensor is selected, and the signal pickup circuit and signal conditioning circuit are designed. After A- / D conversion, the sensor is sent to MSP430F149 processor, and the ammonia concentration data are obtained by data analysis and processing. On this basis, the ammonia concentration data are sent to the monitoring center by wireless transmission. The software of ammonia concentration monitoring data management system is designed. The data of ammonia concentration is stored in database. It has the functions of displaying real-time ammonia concentration curve, alarming threshold value and querying historical data. The analytic hierarchy process (AHP) is introduced to analyze the data, and the decision analysis of multi-point alarm is carried out to better meet the needs of field monitoring. The system can not only meet the engineering requirements of ammonia gas monitoring in thermal power plants, but also has reference value for ammonia monitoring in other engineering fields, and has a good market application scenario.
【学位授予单位】：哈尔滨理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP274;TM621

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