With the acceleration of China's industrialization and urbanization, air pollution has become a serious problem that is difficult to avoid. In recent years, my country has continuously increased environmental protection efforts, and air pollution control has once become the highlight of environmental protection. Although the current air pollution control is still far from the ideal air environment, my country's air quality has been greatly improved.

Among them, the (CEMS) flue gas online monitoring system, as an important equipment for continuous monitoring of the concentration and total emission of gaseous pollutants and particulate matter emitted by air pollution sources, has been widely used in boilers, kilns, etc. Among the operations of industrial enterprises, the penetration rate of flue gas monitoring of boilers and kilns in the industry has been greatly improved.

it is understood that there are currently hundreds of (CEMS) flue gas online monitoring system manufacturers in China, large and small, and CEMS products in China have been improving day by day. Shenzhen yiyuntian electronics co., ltd., as a professional gas detection and monitoring solution provider, its flue gas online detection and pretreatment system has become a necessity for boiler and kiln enterprises to start work, providing a strong backing for flue gas and dust monitoring.

Yiyuntian flue gas online detection pretreatment system TH3000 is mainly used in the gas analysis industry. The main detection occasions include flue gas emission, desulfurization and denitrification, boiler tail gas, sewage pipeline gas detection and analysis, etc.The flue gas or the measured gas on the site is collected by the sampling unit, and the pretreatment unit filters dust, cools down at high temperature, heat preservation by electric tracing, double-stage high-efficiency dehumidification, and keeps the temperature and humidity of the measured gas constant within a certain range. The gas detection and analysis unit performs detection and analysis, displays the measured gas concentration on the display screen in real time, and transmits the data signal to terminals such as PLC or computer, it can also be transmitted to the cloud server through wireless GPRS or network, and then the user reads the data from the server, which can realize global network monitoring and analysis. The whole process for automated processing, without human intervention processing, more efficient operation.

TH3000 gas pretreatment system for a variety of high temperature, high humidity or high dust occasions, can be equipped with automatic blowback system, eliminating the need for manual maintenance cleaning dust filter. The whole sampling pipeline has the function of electric heat tracing and heat preservation, which is beneficial to remove water vapor and can prevent part of gas from dissolving in condensed water to improve the accuracy of detection and analysis, and prevent the sampling pipeline from freezing in winter. The built-in two-stage high-efficiency condensation dehumidification system can stably control the dew point of the gas at 4°C or 5°C, which meets the requirements of various principles of analytical instruments for gas humidity control.

In order to create a safer, environmentally friendly and healthy working and living environment for customers with high-quality products and considerate services, Yiyuntian has always provided advanced, professional and satisfactory system solutions from customer demand diagnosis, scheme design, product realization, installation and commissioning, service operation and maintenance. Therefore, in order for the flue gas online detection and pretreatment system TH3000 to work smoothly in more complex industrial production, Yiyuntian continuously optimizes and improves the flue gas online monitoring system solutions in various professional fields, helps the factory flue gas monitoring, and protects the control of polluted gas emissions and timely adjustment of energy consumption structure.

Taking the common gas boiler flue gas dust online monitoring system as an example, it can be seen from the formation principle of flue gas pollution components that oxygen is its key component. In the actual production process, when the boiler uses fuel for combustion, excess air is generally added. On the one hand, the fuel can be fully burned, but there is another problem. The concentration of pollutants emitted by the exhaust pipe has been "diluted". Greatly reducing the emission concentration will cause the emission concentration of pollutants to "false" up to the standard. Excessive air causes the furnace temperature to drop, which not only affects the combustion, but also takes away a lot of heat and dust, increases the calculation result of the pollution emission concentration, and the large air volume also increases the smoke exhaust power consumption. Therefore, controlling the oxygen content of flue gas is extremely important for controlling the combustion process and achieving safety, high efficiency and low pollution emissions.

The emission concentration of sulfur dioxide and nitrogen oxides in flue gas should be converted according to the specified excess air coefficient. The converted value depends on the measured value of flue gas oxygen content. Therefore, it is very important to control the oxygen content in flue gas during operation to control the final emission concentration of pollutants. Usually use flue gas analyzer to monitor the oxygen content in flue gas, the core technology of gas detection is gas sensor, the current application is more widely electrochemical sensor.

aiming at the on-line monitoring of flue gas dust from gas-fired boilers, yiyuntian designs monitoring projects, focusing on NOX,O2, and optional monitoring of SO2,CO,CO2, etc. firstly, through the installation of on-line flue gas detection pretreatment system TH3000, front-end dust filtration and cooling are carried out, water-gas separation is carried out through the pretreatment system condenser, and the contents of NO,NO2 and O2 are measured by composite gas detector; then, according to the provisions of GB5468 or GB/T16157, the emission concentration of nitrogen oxides is converted by the conversion method of the baseline oxygen emission concentration of atmospheric pollutants. The measured gas concentration is displayed in real time on the display screen, and the data signal is transmitted to the terminal such as PLC or computer. It can also be transmitted to the cloud server through wireless GPRS or network, or connected to the EPA through the number acquisition instrument for real-time supervision.

This set of gas boiler flue gas online monitoring system has modular structure design, flexible configuration, simple operation, convenient maintenance, high data measurement and collection accuracy, and is widely used in boiler flue gas and other industries, and has achieved good The use effect has been well received by customers.