CEMS refers to the device that continuously monitors the concentration and total emission of gaseous pollutants and particulate matter discharged by air pollution sources and transmits the information to the competent authorities in real time. It is known as the "automatic flue gas monitoring system", also known as the "continuous flue gas emission monitoring system" or "on-line flue gas monitoring system".
EM-5 online continuous stack emission monitoring system (CEMS) is composed of gaseous pollutant monitoring subsystem, particulate matter monitoring subsystem, flue gas parameter monitoring subsystem and data acquisition, processing and communication subsystem.
The gaseous pollutant monitoring subsystem is mainly used to monitor the concentration and total emission of gaseous pollutants such as SO2 and NOx. The particulate monitoring subsystem is mainly used to monitor the concentration and total emission of soot. The flue gas parameter monitoring subsystem is mainly used to measure flue gas velocity, flue gas temperature, flue gas pressure, flue gas oxygen content, flue gas humidity, etc., and it is used to calculate the total emission and convert the relevant concentrations. The data acquisition, processing and communication subsystem is composed of data collector and computer system. Various parameters are collected in real time to generate the dry base, wet base and converted concentration corresponding to each concentration value, generate the accumulated emission volume of day, month and year, complete the compensation of lost data and transmit the report to the competent department in real time.
Em-5 online continuous stack emission monitoring system is applicable to the continuous exhaust gas emission monitoring of various boilers. The working principle of the CEMS monitoring system adopts the direct extraction method, which can continuously online monitor the concentration of particles, sulfur dioxide, nitrogen oxides, oxygen content, flue gas temperature, gas pressure, flue gas flow rate, flue gas humidity, and can also expand carbon monoxide and dioxide for specific occasions, measurement of carbon, humidity, hydrogen chloride, hydrogen fluoride, ammonia, hydrogen sulfide, chlorine and other parameters.
The flue gas is extracted by the probe directly through electric heating. After the dedusting heating (120-180℃), heat preservation (greater than 120℃), the sample gas is guided to the pretreatment system, and then transported to the analyzer (ULTRAVIOLET Differential Optical Absorption Spectroscopy (DOAS)) for analysis and measurement by the sample gas control system.
The measured data can be processed and stored by the control computer. It can connect with the computer of the superior environmental protection department through the network, and the environmental protection department can call the monitoring data conveniently and quickly.