Ammonia (NH3) Scrubber
When Ammonia (NH3) is present in the sample stream, a CiSCO NH3 Scrubber is installed upstream of the analyzers to help protect the CEMS analyzers and maintain sample flow.
NH3 may cause clogging of the sample stream in the sample handling system and analyzers at the temperatures downstream of the heated sample line, from the buildup of ammonium salts that may be detected as a white powder. The CiSCO NH3 scrubber removes NH3 from the sample stream by exposing the sample gas to phosphoric-soaked beads. NH3 reacts with phosphoric acid to form ammonium phosphate, a reaction unique to NH3 that will not interfere with other constituents in the sample stream.
An NH3 scrubber is installed by CiSCO at the factory. Each replacement scrubber has inlet and outlet ¼" NPT ports. Remove the spent scrubber by unscrewing the ¼" NPT tube adapter fittings and install the new scrubber by reusing these fittings. Align the inlet and outlet per the flow direction arrow on the scrubber and use fresh Teflon sealer on the fitting threads to prevent leaks.
Phosphoric acid may absorb moisture present in the sample stream, causing it to liquefy. The scrubber must be installed vertically to allow this liquid to drain to the bottom where it will not interfere with the sample gas constituents. A clear plastic site glass near the bottom of the scrubber allows visual inspection of the accumulation of the liquid phosphoric acid solution.
RELATED HARDWARE
Probes
The CiSCO probe is supported entirely by the CEMS. No plant utilities are required at the stack or duct location.
Shelters
CiSCO manufactures custom shelters ranging from 8' x 8' to 10' x 24', with various heights and wider dimensions available, designed specifically for CEMS housing.
The CiSCO Manufacturing Process
Unlike suppliers who use prefabricated housings, CiSCO designs and builds our own custom shelters.