How can one tell whether a molecular sieve contains water from those indicators?

Reply to 1# 286574089: If the carbon dioxide content in the air is high, molecular sieves will absorb water

The outlet water temperature of the air-cooled tower is extremely high； Carbon dioxide levels at the molecular sieve outlet remain above the specified limit ； The resistance of the molecular sieve increases, resulting in an increased pressure difference across the molecular sieve system ； The heat exchanger resistance increases, resulting in a decrease in the pressure in the lower column ； Water droplets are spraying from the vent silencer of the purification system, and a large amount of water is discharged from the drain valve located before the molecular sieve inlet valve.

Water droplets are spraying from the vent silencer of the purification system——this is normal. A large amount of water is discharged from the drain valve located before the molecular sieve inlet valve – although it’s a large amount, it’s not certain that water is actually present. If water does get in, there’s no time to react at all; it happens very quickly. I’ve experienced several instances of water intrusion; I’m tough enough to handle anything that happens. The most memorable incident was when the dew point gauge on the pressure booster went beyond its range, while the molecular sieve carbon dioxide gauge didn’t give any indication – and no one even noticed it. Just imagine how fast that happened. I checked the reading again and found that it had exceeded the range, so I stopped the machine. The molecular sieve is completely soaked; the flange was opened, and water filled the entire tube. After running the blowing tower for half a month, the molecular sieve lasted another four to five years. A good operator is one who can monitor the heating temperature and the cold blow peak during normal production.

The most significant effects are the fluctuations in the inlet and outlet temperatures of the molecular sieve, as well as changes in pressure. There are also changes in carbon dioxide levels, but these are generally more delayed. It is possible to determine whether water is present by checking the blow-off valve on the air main.

The water carried by the molecular sieve is actually water carried by the air-cooled tower, as can be seen from the resistance of the air-cooled tower and the excessively high temperature of the water exiting it.

The resistance of the air-cooled tower has increased； The opening degree of the pressure return water valve in the air-cooled tower has decreased ； The air compressor vent valve is opened wide ； The amount of air entering the tower decreases ； A large amount of water is discharged from the pre-molecular sieve drain valve.

The resistance of the air-cooled tower increases, and water accumulation in the downcomers is more noticeable·

I don’t know what the author means by \"molecular sieve carrying water\" – does it refer to the molecular sieve being penetrated, or water entering the molecular sieve?

The moderator is right to ask; water ingress can generally be identified through the following aspects； 1) The temperature at the molecular sieve outlet rises. 2) Free water is blown out in front of the molecular sieve. 3) The cold blow peak is low; if the water inflow is significant, it is also accompanied by ； The resistance of the molecular sieve increases, the CO2 content rises, and the moisture content in the booster increases. There are many reasons for failures, such as ； Excess water level in the air-cooling tower leads to pressure or flow rate fluctuations. Flapper failure, high temperature, etc