The production capacity of the nitrogen generation unit has declined
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Our company has a 600-cubic-meter nitrogen production unit that has been in operation for 3 years; it operates intermittently, with about 8 hours of operation per day. Currently, its production capacity has dropped significantly, with output being less than 200 cubic meters. When the flow rate is increased, the oxygen content rises rapidly. What causes this, and are there any ways to improve it? Experts, please give me some advice.
Adsorption type? Check if the performance of the adsorbent has deteriorated~~
I discussed with the manufacturer the issue of water or oil entering the molecular sieve, which causes it to become ineffective; I requested that the frequency of replacing the filters and activated carbon be increased
What is your replacement cycle for filters and activated carbon? Generally, 8,000 hours is required
1. The most likely cause is oil entering the molecular sieve. 2. There is a problem with the compression mechanism, resulting in the molecular sieve breaking down. 3. The molecular sieve absorbs water, which reduces its desorption efficiency. 1 and 2 are the main causes. You need to check if the screw air compressor is leaking oil. Generally speaking, if it operates normally for 3 years, it won’t degrade to such an extent
The screw air compressor has oil in it. When we consulted the air compressor manufacturer, we were told that a slight amount of oil is normal. The filter elements and activated carbon are to be replaced every 8,000 hours, but we operate the compressor intermittently, with less than 4,000 hours of operation per year
The attenuation here is quite severe; it’s likely that the performance of the molecular sieve isn’t good enough. What brand is your molecular sieve?
Operational or equipment issues can also affect the service life of the adsorbent~~
First, it is necessary to check whether the equipment is operating properly, such as the pressure values
It is normal for micro-oil screw compressors to have a slight amount of oil present, but if the exhaust temperature of the air compressor is too high, or if the efficiency of the air compressor’s oil filter declines, this can lead to an increase in the oil content in the compressed air. This exceeds the capacity of the filter elements and activated carbon to remove oil, resulting in oil penetration. It’s not difficult to check whether the molecular sieve contains oil either: find a clean cloth or piece of white paper, place the molecular sieve on it, and if you want quick results, use an iron plate to heat it; if you’re not in a hurry, wait and observe whether any oil seeps out