ABB SCC Gas Preprocessing System Maintenance and Selection Guide

Phenomenon: Water ingress or alarm in the analyzer chamber (such as condensate alarm).

Troubleshooting: Immediately check the temperature display of the SCC-C cooler to ensure it is around+3 ° C. Check if the peristaltic pump has stopped running (possibly due to pump tube rupture or motor failure), and check if the condensate collection bottle is full and causing excessive back pressure. If a CGKW condensate water monitor is selected, check if the electrodes are covered by dirt, which may cause false alarms.

Phenomenon: The conversion efficiency of NO2 decreases, and the measured value of NO is low.

Troubleshooting: Check if the heating temperature of the SCC-K converter has reached the set value (such as 320 ° C). If the temperature is normal, it may be due to the failure of the carbon molybdenum catalyst (usually with a lifespan>6 months), and the carbon catalyst kit needs to be replaced. For the thermal converter, check whether there is carbon deposition or blockage in the quartz tube.

Phenomenon: The flowmeter float jumps violently or cannot be adjusted.

Troubleshooting: It may be due to excessive pressure fluctuations in the sample gas at the front end of the feed pump (a stabilizing valve needs to be installed in front of the needle valve), or liquid accumulation in the gas pipeline causing gas flow pulsation. Check if the power supply voltage allocated by SCC-U is stable to avoid interference caused by frequent start stop of solenoid valves.