In recent years, to control air pollution,The national environmental protection department has higher and higher requirements for pollution emissions from coal-fired power plants. Large thermal power plants must install relevant environmental protection equipment, and stipulate that thermal power generation boilers must be installed in accordance with 《HJ／T75-2007Continuous Monitoring of Flue Gas Emissions from Stationary SourcesCEMSThe system transmits real-time, accurate and reliable data to the power dispatch center and the environmental protection department for pollution emission monitoring.

Generally speaking,CEMSThe system consists of a gaseous pollutant monitoring unit, a particulate matter monitoring unit, a flue gas parameter monitoring unit, and a data acquisition and processing transmission unit. Through continuous sampling and analysis, the gas concentration, particulate matter concentration, flue gas temperature, flow rate, pressure, humidity, oxygen content, etc. in the flue gas can be determined, and the concentration and total emission of pollutants can be calculated.

The oxygen content of flue gas is an important index to judge whether the excess air dilutes the flue gas concentration during boiler combustion, and it is also an important basis for converting the concentration. The main methods for measuring the oxygen content of flue gas are zirconia method and oxygen battery electrochemical method.

Here to talk about the oxygen battery electrochemical method to detect oxygen content, which is what we often call the oxygen sensor. At present, oxygen sensors are mostly electrochemical methods, using the principle of electrochemical sensors, and the general service life is1To3year, and the measured oxygen content value is the dry oxygen value. At present, the measurement technology of oxygen content in flue gas is relatively mature, and the existing problems are relatively small.

JapanFIGARONew lead-free oxygen battery sensor series, including5years of life,10Many models such as annual life span are available for customers to choose from. The interface also includes regular hexagonal interface and threaded interface. More long service life, excellent chemical stability, and not easy to withstandCO2The interference and influence of electrolyte weak acid, can work in acidic environment and other characteristics. And the use of lead-free cathode materials, more environmentally friendly, but also more in line withCEMSsystem for environmental purposes, very suitableCEMSThe system detects the oxygen content.

For details, please consult。