Continuous emission monitoring system for volatile organic compound pollutants in industrial flue gas

Abstract

The invention relates to a continuous emission monitoring system for volatile organic compound pollutants in industrial flue gas, and belongs to the technical field of continuous emission monitoring of industrial flue gas. The system comprises five parts, namely, a sampling subsystem, a back flushing subsystem, a gas supply subsystem, a gas detection subsystem and a control subsystem, wherein the sampling subsystem is used for continuously sampling flue gas in a flue into a sample loop; the back flushing subsystem is used for cleaning a sampling probe; the gas supply subsystem is used for providing carrier gas for back flushing of the sampling probe and sample feeding and analysis of the detection subsystem; the gas detection subsystem is used for analyzing components and concentration of VOCs in sample gas on line; the control system is used for controlling running of the whole detection system and monitoring the concentration of VOCs in the flue gas on line. According to the system, the flue gas is continuously acquired and stored in the sample loop, and online sample feeding and detection of the sample gas is implemented through a six-way valve, so that sampling, detection, back flushing and a standby mode are switched; the system has the characteristics of being safe, reliable, highly accurate, low in replacement and maintenance cost, convenient to control and the like.

Description

technical field [0001] The invention belongs to the technical field of continuous monitoring of industrial flue gas discharge, in particular to a flue gas continuous monitoring system CEMS for industrial flue gas volatile organic compound pollutants VOCs. The system is suitable for textile, thermal power, petrochemical, spraying, metallurgy and other industries. Background technique [0002] "Comprehensive Emission Standard of Air Pollutants GB16297-1996" defines pollution sources as facilities that emit air pollutants or building structures (such as workshops, etc.) that emit air pollutants. According to different emission methods, pollution sources can be divided into stationary pollution sources and mobile pollution sources. Stationary pollution sources refer to flues, chimneys and exhaust pipes with fixed positions and stable emissions. Volatile organic compound pollutants VOCs in stationary pollution sources mainly come from textile, thermal power, petrochemical, spra...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a continuous emission monitoring system CEMS for industrial flue gas volatile organic compound pollutants VOCs in order to overcome the shortcomings of the existing flue gas continuous emission monitoring system CEMS for the monitoring of volatile organic compound pollutants VOCs, to realize It realizes the switching of functions such as sampling, detection, blowback, and standby, and has the characteristics of safety, reliability, high precision, low replacement and maintenance costs, and convenient control.

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