Causes of molecular sieve into the water accident: when the air-cooled tower level is higher than 3500mm water exceeds the height of the air inlet tube, a large amount of water with the air into the molecular sieve adsorber; when the air-cooled tower resistance rises, higher than 7kPa, the air-cooled tower will form a liquid suspension of liquid air separation plant, resulting in bottom water level fluctuations, air-cooled tower resistance fluctuations, water with the air into the molecular sieve adsorber; molecular sieve switching program disorder, resulting in a sudden air through the Molecular sieve adsorber airproof, air-cooled tower airflow speed accelerated sharply, water with the air into the molecular sieve adsorber; instrument air pressure is reduced, pneumatic valve self-adjustment out of control, resulting in a rise in the water level; cooling water, chilled water flow is too large, so that the air-cooled tower night hanging.
After the occurrence in liquid air separation plant, should first deal with the air-cooled tower working conditions, stop the pump water supply, the air-cooled tower level down, and make it return to normal working conditions. At the same time the liquid air separation plant to reduce the production to reduce the amount of molecular sieve load, and through the purifier pressure, resistance, regeneration temperature curve and purifier after the carbon dioxide content to determine the water situation, such as into the water is not large due to immediately take remedial adjustment conditions (such as: increase the heating temperature, increase the heating and cold blowing flow, extend the heating time and switching procedures to switch ahead, etc.). If the water volume is too large, the molecular sieve purifier needs to be activated, when activation, pay attention to the first cold blowing with a large airflow, in the free water blowing net then heating. If the activation operation is unsuccessful, the molecular sieve can only be replaced.
Dear Air Separation has standardised design requirements and technical documentation for the production of liquid air separation plant to ensure quality operation.
