Continuous Emissions Monitors System

Cems has four basic parts: the dust monitoring subsystem, gaseous pollutants monitoring subsystem, flue gas parameter monitoring subsystem, system control and data acquisition and processing subsystem. It can monitor so2, nox, o2, dust, temperature, pressure, flow rate and other parameters such as hcl, hf, co, co2 for specific occasions. After dedusting by sampling probe, sampling by heating pipe, dehydration and cooling by two-step condensing, the measured gas is analyzed by the heated gas analysis module (tdlas and doas technique).it is an effective solution to solve the technical problem that great humidity variation of the waste incineration and other occasions lead to measuring data fluctuation.
zetian cems can be divided into hot wet method and condensation method based on different treatment on the water in flue gas during pretreatment process.
Hot wet method: measurement is proceeding under high temperature (120-140�) heat tracing for whole process and effectively prevent water from liquefying that affect measurement and pollution of gas cell.
Condensation: use pre-cooling and condenser to separate gas and water rapidly; directly measure dry base value of gaseous pollutants.