ASYS PRO analyzer

Typical applications

ASYS PRO gas analyzers are designed for automatic control of the volume fraction of H2S, SO2, NH3, CO2, CxHy in sample gas. Gas analyzers are used to monitor crude and process gases of elementary sulfur production units (Claus units) at petrochemical enterprises, oil refining, gas processing, metallurgical and other industries.

Purpose:
- H2S, NH3, CO2, CxHy continuous monitoring in amine acid gas;
- H2S, NH3 continuous monitoring in acid water vaporized gas;
- H2S continuous monitoring in tail gas treatment units;
- H2S continuous monitoring in the blown air above the liquid sulfur layer in the degassing pit;

Measuring principle

The analyzer designed as a single-block housing. Inside the analyzer cabinet there is a heated and heat-insulated unit with a measuring flow cell, cutoff valves and other necessary elements. Heating was carried out to exclude condensation of water vapors, sulfur, ammonia and other corrosive components of the sample.

The principle of operation of the measuring cells of the analyzer is based on diode-laser absorption spectroscopy (TDLAS) and ultraviolet dual optical absorption spectroscopy (UVDOAS).

Sampling is carried out using an ejector located in a specialized sampling probe for acid gases. To remove sulfur vapors, a demister (separator or mist eraser, with controlled cooling temperature) is provided in the sampling probe, in which sulfur vapors condense and partially flow back into the stream and are partially removed by steam blowing.

Analytical specification