【Weekly Topic】{December 4, 2011} Causes of Pressure Swing Adsorbent Leakage and How to Deal With Them
Thread Content
In the membrane separation and PSA pilot test areas, a “Weekly Topic” series on the basics of PSA pressure swing adsorption is being carried out; we invite all colleagues to participate actively. Purpose of the activity: To deepen the knowledge already acquired, and to improve and strengthen the basic theoretical knowledge of all participants through answering questions, thereby reinforcing what they already know and helping them recall what they have forgotten. There must be a reward for the participants. Question: What are the causes of pressure swing adsorbent leakage and how to deal with it?
How to deal with leaks in pressure swing adsorbents? If the adsorbent leaks from the bottom, it is likely that there is a problem with the mesh: 1. The mesh was not pressed properly during installation, resulting in gaps. 2. When installing the adsorbent, the screen was not checked, and it was damaged. 3. The mesh size of the screen selected should be large enough, at least 20 mesh or more. 4. The strength of the screen is insufficient. China Pressure Swing Adsorption Network: 5. If there are problems with the sieve bed, and conditions permit, remove the adsorbent to repair the sieve bed and reinstall it afterward. If that’s not possible, reinforce the filter at the bottom cover of the adsorption cylinder, which will allow for short-term operation. 6. The perimeter of the sieve mesh is not properly compressed, resulting in uneven pressure; this causes alternating positive and negative pressures in certain areas during operation, leading to leakage of the adsorbent. If it is not reinstalled properly, the bed layer will become increasingly loose, with the molecular sieve remaining in a suspended state; this leads to rapid wear and results in the entire adsorbent becoming unusable.
This post was last edited by Air Separation Main Cooler on 2011-12-11 at 08:53. The cause of the pressure swing adsorbent leakage is a problem with the wire mesh； The solutions are: 1. During installation, the screen was not pressed properly, leaving gaps. 2. When installing the adsorbent, the screen was not checked, and it was damaged. 3. The mesh size of the screen selected should be large enough, at least 20 mesh or more. 4. The strength of the screen is insufficient. 5. If there is a problem with the sieve bed, and conditions permit, remove the adsorbent to repair the sieve bed and reinstall it afterward; if that’s not possible, reinforce the filter at the cover below the adsorption cylinder to allow for short-term operation. 6. The perimeter of the sieve mesh is not properly compressed, resulting in uneven pressure; this causes alternating positive and negative pressures in certain areas during operation, leading to leakage of the adsorbent. If it is not reinstalled properly, the bed layer will become increasingly loose, with the molecular sieve remaining in a suspended state; this leads to rapid wear and results in the entire adsorbent becoming unusable.
This post was last edited by Kongfen Zhuleng on 2011-12-11 at 08:54. The leakage of adsorbent from the bottom can only be caused by a problem with the wire mesh: 1. During installation, the wire mesh wasn’t properly pressed down, resulting in gaps. 2. When installing the adsorbent, the screen was not checked, and it was damaged. 3. The mesh size of the screen selected should be large enough, at least 20 mesh or more. 4. The strength of the screen is insufficient. China Pressure Swing Adsorption Network: 5. If there are problems with the sieve bed, and conditions permit, remove the adsorbent to repair the sieve bed and reinstall it afterward. If that’s not possible, reinforce the filter at the bottom cover of the adsorption cylinder, which will allow for short-term operation. 6. The perimeter of the sieve mesh is not properly compressed, resulting in uneven pressure; this causes alternating positive and negative pressures in certain areas during operation, leading to leakage of the adsorbent. If it is not reinstalled properly, the bed layer will become increasingly loose, with the molecular sieve remaining in a suspended state; this leads to rapid wear and results in the entire adsorbent becoming unusable.
The only possibility for leakage of the adsorbent from the bottom is a problem with the mesh: 1. The mesh was not pressed properly during installation, leaving gaps. 1 M- I5 g* o. Q3 F% a% S) R 2. When installing the adsorbent, the screen was not checked, and it was damaged. 9 |- l4 n- t’ e, P 3: The mesh size selected for the screen should be large enough, at least 20 mesh or more. 4. The strength of the screen is insufficient. China Pressure Swing Adsorption Network’ }7 `& C! ]9 s9 z 5: If there are problems with the sieve bed, and conditions permit, the adsorbent can be removed to repair the sieve bed; after repair, it can be reinstalled. If that’s not possible, the filter at the bottom cover of the adsorption cylinder can be reinforced to allow for short-term operation. 6. The perimeter of the sieve mesh is not properly compressed, resulting in uneven pressure; this causes alternating positive and negative pressures in certain areas during operation, leading to leakage of the adsorbent. If it is not reinstalled properly, the bed layer will become increasingly loose, with the molecular sieve remaining in a suspended state; this leads to rapid wear and results in the entire adsorbent becoming unusable. As a supplementary point, another reason is that over time, as the adsorbent is continuously exposed to the flow of air, it gradually shrinks, which may also lead to leakage of the adsorbent from the bottom