You may have used a nitrogen compressor, but you still don't know what to do after the failure. Since there may be differences between different compressors, the operation methods and precautions are the same as those of oxygen compressors and hydrogen compressors. I hope that after reading this article, I can have an understanding of the root cause of the failure.
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Different failures and countermeasures of nitrogen compressor
Nitrogen compressor compression operation procedure
Different failures and countermeasures of nitrogen compressor
If the compressor is cut off from oil or water, or the temperature and pressure of the tertiary discharge exceed the set value, the control system will issue an alarm and delay the shutdown to protect the nitrogen compressor. The piston body was sent to the lathe to remachine the guide ring groove, and the supplier also equipped a widened non-standard guide ring. It is recommended to use one piston body for each stage. When a problem with the guide ring is found during the inspection, it is necessary to reheat the new ring. The spare piston body can be used directly.
The nitrogen compressor experienced an inter-stage pressure anomaly after operating for more than 6,000 hours: the discharge pressure and temperature of the first stage were both high, and then dropped again. During the shutdown inspection process, the auxiliary intake valve has a stainless steel sheet, and the upper and lower end surfaces of the auxiliary piston body are squeezed with stainless steel fragments. Due to the severe wear of the piston ring, the elastic ring in the groove will be exposed, the cylinder wall will also wear, and the elastic ring will be broken into fragments, which will cause the valve to leak. After polishing the piston body and cylinder wall, replace the new second and third stage piston rings, check the exhaust valves of each level, remove the elastic rings of all levels, return to normal use, and remove the oxygen Elastic ring machine. Reuse.
During the operation of the compressor, the exhaust temperature of the third stage increased abnormally, the piston rod checked by the first stage did not move up and down, and the second and third stages were normal. When the machine was shut down to the first stage, a cylinder collision occurred: the connecting rod large-end bearing fixing bolt broke, the piston stroke increased to the limit, the aluminum piston body was crushed, the cylinder head was hit due to cracks and water seepage, and the connecting rod broke. Then, the machine was completely disassembled and overhauled, and the first-stage piston body, connecting rod, damaged main bearing bushes, large head bushes, connecting rod bolts, etc. were replaced. The troops were readjusted and finally restored. Valve failure.
Nitrogen compressor compression operation procedure
1 Scope
It specifies the operating tasks, operating points, precautions and accident handling of the nitrogen compression station. This post-operation method is suitable for a nitrogen compressor used as a nitrogen compressor.
2. Process requirements
Usually, the 0.03 MPa nitrogen is compressed from normal pressure to 20 MPa, and then sent to the high-pressure nitrogen storage tank.
3. Post-operation tasks
Nitrogen compressors usually compress nitrogen from atmospheric pressure to 20 MPa equipment.
4. Introduction to the process
The 0.03 MPa nitrogen enters the nitrogen buffer tank from the outside of the boundary area. After being separated from the water, it is sent to the nitrogen compressor through the seventh stage at a pressure of 10 MPa, and then enters the high-pressure nitrogen storage tank.
5. Raw material specifications
The purity of nitrogen is 99.5%, the oxygen content is 10PPm, the normal temperature is 0.0MPa (gauge pressure), and there is no oil and dust.
If you can find out the cause of the failure by yourself and solve it by yourself, then you can learn from the experience of this article. If you don't fix it yourself, it doesn't matter, we will have professional staff to solve the problem for you.