AMS   A001159

A001159
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Complex combustion systems and processes require besides a fast In-Situ O2- measurement to control the combustion, a quality measurement to adjust the combustion system at a level which avoids the generation of CO. The control level around the point of CO generation is the optimum of the combustion. AMS offers for this application the COe In-Line Flue gas probe AMS 3211-1600 with a dual sensor which allows the measurement of O2 and unburnt Hydrocarbons. The unburnt Hydrocarbons are measured as CO equivalent (COe). Due to the fast response of the dual sensor the plant control can make use of the additional control value COe. The COe In-Line Flue gas probe AMS 3211-1600 can be operated with the Transmitter AMS 3220. The Transmitters is available as Twin- Version to supply separate signals for O2 and COe.

The Sensor of the COe In-Line Flue gas probe AMS 3211-1600 is made of a electrochemical solid electrolyte sensor of partially stabilised Zircon dioxide ceramic. The sensor has three electrodes:

• O2-sensitive Platinum electrode
• CO / H2-sensitive electrode made of Platinum / Precious metal alloy
• Platinum reference electrode

The measurement of COe with the COe In-Line Flue gas probe AMS 3211-1600 is not a CO measurement in the classical sense. The Flue gas probe AMS 3211-1600 measures in-situ the concentration of the sum of all combustible (oxidising) flue gas components such as CO and H2. The result of the measurement is displayed as COe. In applications with a known fuel at a constant composition the true CO concentration can be determined within limits. The COe In-Line Flue gas probe AMS 3211-1600 can be used for the measurement of O2 and Coe in Natural gas, Fuel Oil # 4, Lignite and Hard coal. The measuring range of the component COe is 1000 PPMv. For a quality measurement this range is quite sufficient, since the main purpose of the measurement is to avoid the generation of Carbon Monoxide. Due to the physical dimensions the sensor for measurement of O2 and COe can also be utilised with all other flue gas probes of AMS.

The High temperature Flue gas probe AMS 3211-1600 can be operated with the Transmitter AMS 3220 and a Pneumatic unit. The Pneumatic unit is fitted with all necessary regulation and control instruments for the high-pressure air supply for the pneumatic pump. The power supply of the Flue gas probe and the Transmitter is also installed in the Pneumatic unit. The flue gas probe, the Transmitter and the Pneumatic unit are manufactured according to the protection class IP 65 for General Applications. Since all AMS Flue gas probes are manufactured according to customer specification, the selection of the probe material as well as dimensions and sizes can be made fitting to any application. Optional the High temperature Flue gas probe AMS 3211-1600 can be equipped with time controlled back purge for high dust applications and with Auto-calibration for the automatic, time controlled calibration. To replace an already existing continuous oxygen measuring system the High temperature Flue gas probe AMS 3211-1600 can be fitted with all flange sizes both in DIN and ANSI dimensions. To calibrate the COe In-Line Flue gas probe AMS 3211-1600 both components O2 and CO have to be verified against a certified standard gas.