What are the reasons for the insufficient processing capacity of reciprocating compressors?
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The pressure in our device never reaches the desired level. I would like to ask the experts: what are the common causes for this problem? Note: We have a catalytic reforming unit; since the octane rating of the product is not sufficient, it is constantly suggested that the hydrogen-to-oil ratio is too low. As a result, the process engineering team determined that the capacity of the compressor is insufficient. The compressor in question is a reciprocating type reforming cycle hydrogen compressor, lubricated with oil, and its cylinders are equipped with cooling systems. The cylinder temperature is generally around 100 degrees Celsius. The medium used is hydrogen, along with some light hydrocarbons such as C3 and C4, as well as hydrogen sulfide. Every time the fitter comes to fix it, he cleans the air valve and replaces the valve gasket; he says the air valve is leaking, but things remain the same after each repair – the pressure still doesn’t increase. Apart from the possibility that it’s due to the air valve, are there any other issues? What are the main ones? Thank you! ! This post was last edited by lxzzl on 2009-3-27 08:51]
The specific reasons may include the following: 1. Leakage from the compressor’s air valves and packing； 2. The circulating water cooling effect for the cylinder liner and cylinder head is poor ； 3. Compressor pipeline leakage ； 4. Cooler leakage, with gas entering the water side ； 5. The operating temperature of the compressor is too high, resulting in a decrease in the compressor’s load ； 6. The inlet gas pressure is lower than the design pressure, resulting in insufficient compressor output ； 7. The inlet gas temperature is higher than the design pressure, resulting in insufficient compressor output ； 8. Internal leakage in the inter-stage safety valve, resulting in insufficient compressor output ； 9. The return valve in the high-pressure section is not closed properly or its sealing surface is damaged, resulting in gas leakage into the compressor inlet and thus insufficient compressor output ； 10. The composition of the inlet gas does not meet the design standards; the hydrogen content is low, resulting in insufficient compressor output. This post was last edited by lxzzl on 2009-3-27 08:53]
What was said on the 2nd floor covers it pretty well; I’d like to add that if your machine has a waste discharge system, check whether there is any internal leakage in the valves of that system； Check again whether the cylinder clearance is too large ； Also, if your machine has been in use for a long time, you should consider cleaning the pipelines between various sections to restore their gas transport capacity ； The analysis considers whether there are design flaws in the type of valve used by the compressor, which may result in insufficient airflow. This post was last edited by lxzzl on 2009-3-17 09:50]
Based on experience, there are the following points: 1. Valve seat sealing issue； 2. Is there any issue with the orientation of the piston ring openings? ； 3. The piston ring is worn into an elliptical shape, causing air leakage ； 4. There is a problem with the piston ellipse ； 5. The packing seal is not tight enough ； 6. Improper clearance at the piston dead center ； 7. Sealing leakage between the valve seat and the seat bottom ； 8. The displacement is indeed small. This post was last edited by lxzzl on 2009-3-27 08:52.]
Check again to see if there are any problems with the cooling system.
The reasons are probably as follows: 1. The temperature of the incoming gas is relatively high； 2. The inlet gas pressure is too low ； 3. There is a leak in the compressor’s air valve ； 4. There is a leak in the compressor return line valve ； 5. Wear of the compressor piston rings results in air leakage. This post was last edited by lxzzl on 2009-3-27 08:54]
1. Valve leakage； 2. Excessive clearance volume ； 3. The water cooler has poor performance. This post was last edited by lxzzl on 2009-3-27 08:55.]
The intake and exhaust valves are leaking; have a qualified technician perform repairs!
1. Valve leakage and excessive clearance volume can both lead to reduced compression work and lower efficiency
According to what the poster described, the reason for the small displacement is: 1. The design itself is small; it is necessary to redesign and change the model； ⒉If the quality of the air valves is poor, then purchase air valves from brands such as Shen Qi, Shenyang Yuanda, or Herbig to replace them ； ⒊The inlet filter is clogged; switch to another unit for cleaning ； ⒋The piston ring seal is not good; use one of higher quality instead. Incidentally, as a side note, the cylinders of the reforming cycle machine cannot be lubricated with oil; introducing oil into the reaction system is detrimental to the reaction and can lead to coking.