Reciprocating compressor operation and maintenance one-to-one Q&A office
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I work in a large petrochemical enterprise with 2,000 employees as an equipment engineer. I have been engaged in compressor maintenance and management for more than 6 years. The reciprocating compressor of the unit is from Yuanda, Bengbu. You can participate in the discussion on issues related to the operation and maintenance of reciprocating compressors, and I will do my best to answer questions. My online time is usually on working days. P.S.: Please embrace each other and learn from each other * Participate in discussions with a communicative attitude. No one is perfect, learn from each other * . There is a certain order of learning, and there is a specialization in the art.
Thank you for your selfless dedication. I would like to ask you what are the main production equipment of your company? What is the working pressure and flow range of the compressor?
Ask a question: Does your company use circulating water or softened water for compressor packing cooling? Is it feasible to use recycled water? shortcoming? Maintenance frequency and method?
What is your company's water quality requirements? What is the accuracy of the secondary filter at the packing location?
How to solve the problem of oil leakage at the connection surface between the middle body and the crankcase?
Can you provide water quality analysis of circulating water?
This is a drawing of one of our Yuanda compressors. Because it is encrypted, you can’t see the electronic version. I took it with my mobile phone and the pixels are limited, so I’ll make do with it. Hope this helps.
The packing here is the compressor seal packing. The main purpose is to prevent the compressed gas in the cylinder from leaking out and external impurities from entering the cylinder. Not a filler for cooling water towers or other towers!
Oil leakage at the middle body connection is common on reciprocating compressors, and the middle seal is generally made of highland barley paper or sealant. Then there is the fastening of the middle body connecting bolts. I believe many companies have not done it. First, there is no time. ； Second, I need to open the window, which is troublesome. ； Or there is no awareness at all. If there is opportunity and time for downtime, tightening the middle body connecting bolts can effectively solve the problem of leakage at the middle body connection.
Meet the host: Are the middle body bolts tight or are they leaking? I have an old compressor that often leaks oil. I separated the crankcase and found that the oil return hole pad was corroded (lead pad), so I replaced it with a PTFE pad. If it leaks again after a period of time, it is probably due to leakage on the joint surface. This surface has to withstand multiple forces such as horizontal and vertical pulse forces, gravity, etc., and it is easy to leak. I wonder if the new models are sealed with rubber strips?
Well, it's the cold water from the cooling tower, which is the same water used in the heat exchanger.