电站锅炉炉膛出口烟气温度在线监测方法

Online monitoring method for flue gas temperature of hearth outlet of power station boiler

Abstract

The invention discloses an online monitoring method for the flue gas temperature of a hearth outlet of a power boiler, comprising the steps of: placing a plurality of targets at a vertical section near a smokestack of a boiler for sensing the temperature; installing a near infrared imaging device on the side wall of a horizontal flue of the boiler for collecting the radiation energy of the targets; carrying out communication by the near infrared imaging device with a computer through a serial port and RS232, sending the collected radiation energy of the targets to the computer, calculating by the computer to obtain temperature data of the targets; and then sending the temperature data of the targets to a host computer for processing, and converting the temperature to the flue gas temperature of the position of the targets. The invention has the advantages that the average temperature at the section of the hearth outlet, the average temperature of the upper/lower and left/right side, and the highest/the lowest temperature can be continuously monitored, the distribution curve of the temperature of the section can be drawn, and a plurality of alarm functions are set; and the invention is beneficial to the safe and economic operation of a boil with a large capacity and high parameters.
本发明公开了一种电站锅炉炉膛出口烟气温度在线监测方法,在锅炉烟窗附近的垂直断面上布置多个靶标用于感温;在锅炉水平烟道的侧墙上,安装近红外成像仪,用于采集靶标的辐射能量;近红外成像仪通过串口由RS232与计算机进行通讯,将采集到的靶标的辐射能量送入计算机,由计算机进行计算,得到靶标的温度数据;然后将靶标的温度数据送入上位计算机进行处理,转换成靶标所在位置的烟气温度。本发明的优点是:能在线连续监测炉膛出口断面平均温度、上/下侧及左/右侧平均温度、最高/最低温度,并能绘制断面温度分布曲线,能设置多种报警功能;有利于大容量、高参数锅炉的安全、经济运行。

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