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Carbon molecular sieve filling needs to be analyzed and planned according to the technical documents and process requirements of the demand side, and specific replacement filling plans and related precautions should be formulated. The general process is as follows:
1, Before replacing the carbon molecular sieve, a comprehensive maintenance and inspection of the equipment should be carried out. All valve components and pipelines need to be inspected.
2. Equipment inspection
2.1 Instrument inspection Check all pressure display PI and temperature display TI instruments; Adjust the threshold value of pressure switch and differential pressure switch, as well as the threshold value of tool temperature interlock; Check the limit switches, limit points and electrical contact points of all valves related to the molecular sieve adsorbent. Check if all two valves are working reliably, and if necessary, adjust the cylinder. Check if the direction of all automatic valve components is correct.
2.2 Inspection of Automatic Control System for Pr-Purifier Check the configuration of the automatic control program; Step by step check the direction of the solenoid valve used for pr-purifier valve control according to the program (check the electromagnetic polarity related to the valve); Check if all action signals from the site have been connected to the automatic control system: Stepping conditions caused by pressure switches, differential pressure switches, and temperature thresholds value, Confirm the valve switch position determined by the limit switch; Adjust the timer.
2.3 Adjusting the control circuit: Regenerated air flow into the heater flow circuit; Regenerative airflow cold box outlet pressure.
2.4 Operation of regeneration heater Check the combination and transformation of each heating unit: fixed power - variable power; Adjust the control of heating temperature and adjust the safety temperature control threshold; Check the tripping conditions of the electric heater 3. Replace the carbon molecular sieve step.
3.1. Calculate the specific filling quantity, then prepare the required materials and tools, based on the volume of the adsorption tower.
3.2. Before opening the flange cover of the adsorption tower, make corresponding marks, and during installation, ensure that it is properly seated, especially the connection between the pipeline and the front control components.
