Air separation equipment molecular sieve purification, one is the cooling equipment stage, the second is the accumulation of liquid stage, the third room to adjust the working condition stage. In the start-up process mainly focuses on giving full play to the refrigeration capacity of the expander, reasonably distributing the cooling capacity, and comprehensively cooling the equipment.
Attention should be paid to the following aspects: the molecular sieve used for the first time should be activated and regenerated once, with the purpose of removing the water and carbon dioxide adsorbed in the process of transport and filling. Activation temperature is generally higher than 200 ℃, lower than 250 ℃, when the outlet temperature reaches 80 ℃ can be cold blowing, activation time of not less than two cycles;
When the molecular sieve start-up process to send gas slowly, the venting valve should be closed cautiously to prevent damage to the molecular sieve in the bed due to pressure fluctuations; need to start the two expanders should be fully open booster reflux valve, the pressure of the first operating expander down, and then the two expander at the same time to load, to prevent the start of the booster after the occurrence of wheezing; pay attention to the control of the middle temperature of the heat exchanger; pay attention to the air-cooled tower to ensure that the work of the pre-cooled air to meet the design requirements. Pay attention to the work of air cooling tower to ensure that the pre-cooled air meets the design requirements.
DEAR Air Separation has rich technology and experience in design, manufacture and development of air separation equipment.
There are standardised design requirements and technical documents in all aspects of the equipment to ensure high quality and safe operation.
