水泥熟料烧成系统热效KPI智能监测研究

发布时间：2018-04-27 22:40

本文选题：水泥熟料烧成系统 + 热效　；参考：《济南大学》2015年硕士论文

【摘要】：水泥熟料烧成系统热耗占据了整个水泥生产热耗的绝大部分,是一个巨大的耗能系统。而水泥生产设备众多,工艺和热力学基理复杂,是一个高度非线性、高阶次的热工过程,很难用一个简单的模型来描述其能效关系及能量传递规律。目前,水泥生产过程的热量和热效的研究仅限于整个烧成系统且是离线计算,无法实时在线监测,存在较大的滞后性,更没有可在线指导熟料烧成过程实时控制的热效KPI(Key Performance Index)。本文以山东某水泥厂5000t/d(吨每天)熟料线为背景,深入研究了水泥熟料烧成系统工艺原理、热工过程以及热力学原理,确定了系统及各环节(预热器环节、分解炉环节、回转窑环节、篦冷机环节)的热效和总热效(热力学)作为对现场用能状况监测的KPI,并实现了在线智能监测,可对熟料烧成过程操作提供有效支持。具体工作内容如下:首先,确定了影响水泥熟料烧成系统及各环节热效智能监测的因素和相关参数的获取方式,包括:可在线监测参数(如窑头罩温度、分解炉内压力、高温风机转速等)、化验室不定周期参数(如煤粉热值、生料成分、烟气成分等)、人工设定固定参数(如系统表面散热量、窑头辐射热、气体温度等)以及部分关键参数的软测量数据(如风机实际风量参数、热容参数、出篦冷机熟料量等),其中,重点研究了基于最小二乘支持向量机(LS_SVM)原理的出篦冷机熟料量和基于机理分析的风机实际风量的软测量等。其次,分别对烧成系统、预热器环节、分解炉环节、回转窑环节和篦冷机环节的收入热量、支出热量的在线监测进行了研究。基于现场调研及热工分析,确定烧成系统及各环节的热效和总热效(热力学)为水泥熟料烧成系统热效KPI。并基于获取的前述参数,实现了烧成系统和其他四个环节的热平衡状态和热效KPI的智能监测,并给予了工程实例的分析。最后,开发了水泥熟料烧成系统热效KPI智能监测软件,主要包括后台计算和网页发布的研发,分别实现数据的获取和参数的计算以及重要数据的网页发布、浏览等功能,便于相关人员就地及远程了解现场用能状况。实际应用证明,该软件运行可靠,结果相对准确,可为操作人员合理调控熟料烧成过程提供实时、有效支持。
[Abstract]:The heat consumption of cement clinker sintering system accounts for most of the heat consumption in cement production and is a huge energy consumption system. However, cement production is a highly nonlinear and high-order thermal process with a large number of equipment and complex technological and thermodynamic fundamentals. It is difficult to describe its energy efficiency relationship and energy transfer law by a simple model. At present, the research of heat and thermal efficiency in cement production process is limited to the whole sintering system and is off-line calculation, which can not be monitored in real time, and there is a great lag, and there is no heat efficiency KPI(Key Performance index which can guide the real time control of clinker sintering process on line. Based on the clinker line of 5000t / d (per ton per day) in a cement plant in Shandong Province, this paper has deeply studied the process principle, thermal process and thermodynamic principle of cement clinker sintering system, and determined the system and each link (preheater link, calciner link). The thermal efficiency and total thermal efficiency (thermodynamics) of rotary kiln and grate cooler are used as KPIs to monitor field energy use condition, and on-line intelligent monitoring is realized, which can provide effective support for clinker firing process operation. The specific work is as follows: firstly, the factors affecting the intelligent monitoring of thermal efficiency of cement clinker burning system and each link are determined, including on-line monitoring parameters (such as kiln hood temperature, calciner pressure, etc.) Rotating speed of high temperature fan, constant period parameters of laboratory (such as calorific value of pulverized coal, raw material composition, smoke composition, etc.), fixed parameters (such as system surface heat dissipation, kiln head radiant heat, etc.) Gas temperature and some key parameters of soft sensing data (such as fan actual air flow parameters, heat capacity parameters, grate cooler clinker quantity, etc.), The soft measurement of clinker quantity of grate cooler based on the least square support vector machine (LSSVM) principle and the actual air volume of fan based on mechanism analysis are mainly studied in this paper. Secondly, the on-line monitoring of income heat and expenditure heat of sintering system, preheater, calciner, rotary kiln and grate cooler are studied respectively. Based on field investigation and thermal analysis, the thermal efficiency and total thermal efficiency (thermodynamics) of the sintering system and each link are determined to be the heat efficiency KPIs of cement clinker sintering system. Based on the obtained parameters, the intelligent monitoring of the thermal equilibrium state and thermal efficiency KPI of the firing system and the other four links is realized, and the analysis of engineering examples is given. Finally, the KPI intelligent monitoring software for heat efficiency of cement clinker burning system is developed, which mainly includes the research and development of backstage calculation and web page release, the acquisition of data and the calculation of parameters, as well as the functions of publishing and browsing important data on the web page. To facilitate the relevant personnel to understand the site and remote energy use status. The practical application shows that the software is reliable and the results are relatively accurate. It can provide real time and effective support for the operators to regulate the clinker firing process reasonably.
【学位授予单位】：济南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ172.62

【共引文献】