Precautions for replacing molecular sieves

Choose a sunny day. Level it off after installation.

It wears out quite quickly – it needs to be replaced after 3 years. After replacing it, don’t forget to analyze why it stopped working after such a short time

Has some accident occurred? Replacing it every three years is too wasteful. 1. Be careful to prevent the packaging bags from being damaged during transportation. 2. Remove all unnecessary items to avoid accidentally putting them into the molecular sieve. 3. If it starts to rain during the filling process, stop filling or take measures to protect against rain, in order to prevent the molecular sieve from getting wet. 4. All people entering the tank should empty their pockets before entering, and no items should be brought inside the tank

Molecular sieves from German BF and Japanese Takeda, among others, generally come with a service life of 10 years. If the packing density is not sufficient, it can affect this service life; be sure to compress them properly

Which brand of molecular sieve is being used? We use those from Shanghai UOP, and they generally last for over 8 years before needing to be replaced.

Check whether the intermediate screen is damaged; when reinstalling the screen, it must be laid out evenly. The molecular sieve filler must be filled to the mark and leveled out

First, confirm whether the underlying alumina can still be used? Otherwise, it has to be completely removed and refilled. If the alumina layer is in good condition and the existing molecular sieve passes the inspection and can still be used, then more molecular sieve can be added; if it cannot be used, it also needs to be removed to prevent the molecular sieve layer from becoming too thick, which could affect the regeneration airflow! Finally, don’t forget to let us know the reason why the molecular sieve fails after three years of use!

Technology is important, and safety must also be taken into account; it depends on which stage the maintenance is carried out at, and care should be taken with nitrogen.

After stopping the vehicle, open the manhole; if there are manholes on both the upper and lower sides, ensure ventilation. After ventilation, enter and remove the debris, making sure to first analyze the oxygen level, and also prepare a long-length breathing apparatus. When lifting molecular sieves on site, pay attention to the safety of the crane to prevent the hook from falling and hurting people. Molecular sieves are all sold in barrels. . It’s better to buy high-quality analytical sieves; those from UOP are only average in quality. Molecular sieves from other manufacturers can also last for 7–8 years. It is said that the molecular sieves used in Air Liquide’s vertical radial-flow patented purifiers can last up to 20 years. Of course, a long service life of this molecular sieve does not indicate that it is of high quality; rather, process optimization is what extends its useful life. . If it needs to be replaced every 3 years in your case, then you need to check whether there is water at the bottom of the molecular sieve purifier; it might be that water from the cooling tower ends up causing the molecular sieve to become flooded. If your system has a dual-bed configuration, replace the active alumina and inert alumina as well, since those materials generally last only about 3 years before needing to be replaced. . Furthermore, air quality also directly affects the lifespan of molecular sieves; if possible, it is advisable to analyze the components in the air. . If nitrous oxide is present, it is recommended to purchase some molecular sieves designed to absorb nitrous oxide and place them on top to protect the device. Also, since the molecular sieves have already been purchased, it’s a good idea to check the bottom filter again; if there are any leaks, have a specialized manufacturer repair them. The cost of repairing the anemometer? . . The estimated cost for 52,000 units of air separation is 200,000 to 250,000. . .

We’re still using it after 10 years; why replace it so quickly?