Sulfur dioxide (SO₂) is recognized as an important corrosive gas in the atmosphere, which can accelerate the corrosion process of most metals. China is a major coal producer and consumer in the world, suffering from severe SO₂ pollution. In some regions, the SO₂ content in the atmosphere exceeds 60% of the environmental capacity. Therefore, it is imperative to monitor SO₂ and establish accurate and sensitive measurement methods. The main monitoring methods include solution absorption method, passive sampling method and on-line monitoring.
In heavily polluting industries such as power plants and petrochemical industry, it is necessary to understand the corrosivity and its changes of the environment where the equipment operates during operation, so as to detect problems in a timely manner and take necessary anti-corrosion measures. For this purpose, a set of SO₂ on-line monitoring system has been established to real-timely monitor the changes of SO₂ in the environment of the equipment, thus enabling effective monitoring of the equipment's corrosion rate under normal operating conditions. The Continuous Emission Monitoring System (CEMS) is a widely used on-line pollutant monitoring system. It measures the concentrations of various pollutants in the flue gas emitted from fixed pollution sources in a real-time and continuous manner through extraction or direct measurement, among which gaseous pollutants mainly include SO₂ and nitrogen oxides. At present, this system has been widely applied in enterprises with large coal consumption such as thermal power plants, iron and steel plants, cement plants and petrochemical plants.
The Continuous Emission Monitoring System (CEMS) is mainly used for the continuous monitoring of various industrial waste gas sources, such as thermal power plants, waste incineration plants, coal mines, petrochemical plants, paper mills and other industries. With the rapid development of industrial production and enterprises, industrial waste gas emission pollution has become a prominent environmental problem in China. In accordance with the provisions of the Air Pollution Prevention and Control Law, industrial waste gas must be pretreated and can only be discharged after meeting the national emission standards for waste gas. These substances enter the human body through the respiratory tract via various pathways; some cause direct harm, while others have an accumulative effect, which will pose even more serious harm to human health. Industrial waste gas purification is a specific work that preprocesses the waste gas generated in industrial places such as factories and workshops before its discharge to meet the national waste gas emission standards. It is usually also necessary to detect the purified waste gas to ensure that it complies with the emission standards.
Sulfur dioxide (SO₂) in industrial waste gas is a highly harmful gas to the environment, which needs to be measured by sulfur dioxide sensors. Therefore, for the SO₂ sensors in the Continuous Emission Monitoring System (CEMS), Shenzhen Wuliang Sensor Technology Co., Ltd. recommends the GS+4SO₂ sulfur dioxide sensor, which is highly suitable for environmental air quality monitoring systems and instruments.
