Steel plant gas online monitoring system

The steel industry must deal with many hazardous gases, including carbon monoxide, ammonia, sulfur compounds, and benzene from processing. In addition, processes can introduce hazardous gases from outside, such as pure oxygen used in the alkaline oxygen steelmaking process and nitrogen or argon used in secondary processes.
Due to the large amounts of water and energy required for processing, steelmaking facilities are often equipped with water treatment and power generation facilities, which can also generate hazardous gases. Hydrogen cross-reacts with carbon monoxide electrochemical sensors, so CO sensors that filter hydrogen should be standard for steelmaking facilities.
One of the biggest risks in steel plants is the potential leakage of CO, which is formed in the blast furnace during the smelting process. Naturally low levels of CO are present in the air we breathe, but high levels of CO inhaled by humans can lead to loss of consciousness and possible death.

According to "Industrial Enterprise Design Health Standard" GBZ1-2002: the maximum allowed carbon monoxide concentration in the workshop is 30mg/m3, when the operating time is not more than 30min at a time, the allowed carbon monoxide concentration can be relaxed to 100 mg/m3 (about 26ppm), when the operating time is 10~20min the maximum allowed carbon monoxide concentration is 200 mg/m3 ( 175ppm), so the detection range of 0-1000ppm is selected to meet the national standard. The following designs are in accordance with the national standards.