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Preventive measures for combustion explosion of LOX pump in nitrogen generator

Article Source：Suzhou Shenyue Purification Website：www.szshenyue.comTime：2017-3-15Pageviews ：833

Core prompt：In addition to the nitrogen machine structure to ensure that the motor and pump shaft as far away as possible and sealing parts using non-ferrous metals, in order to prevent sparks, the operation should strictly comply with the operating procedures:

First, in addition to the nitrogen machine structure to ensure that the motor and pump shaft as far away as possible and sealing parts using non-ferrous metals, in order to prevent sparks, the operation should strictly comply with the operating procedures:
1, liquid oxygen pump cooling before starting, should blow valve open, first labyrinth seal through the normal temperature nitrogen blowing 10 ~ 20min, on the one hand the oxygen to drive away, and make the seal back to the normal temperature gap;
2, barring, determine fault, start the pump, pay attention to whether the pump inlet pressure stability, such as pressure fluctuation or outlet pressure does not rise, may lead to cavitation phenomenon, must open the upper pump exhaust valve, cooling to liquid oxygen pump, pressure tends to be stable, and then control the seal gas pressure than before sealing high pressure 01005 ~ 0101MPa;
3, first through the sealing gas, the nitrogen machine to adjust to the appropriate pressure, and then open the pump inlet and outlet valve, let the liquid oxygen into the pump cooling, at this time the sealing gas pressure must be higher than the inlet pressure of about 0105MPa.
Two. Normal operation and maintenance:
1. Check the operation of 1 LOX pumps every 2h;
2, each 1H check 1 times nitrogen machine inlet and outlet pressure and sealing gas pressure, flow is normal, whether there is gas-liquid leakage situation. And the temperature of the pump side bearing and the motor temperature, the bearing temperature should be controlled - - 25 ~ 70 degrees centigrade;
3, liquid oxygen pump operation shall not close the inlet valve, sealing gas shall not be interrupted, should be adjusted at any time.

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Keywords：PSA Hydrogen Production，Nitrogen making machine in metallurgical industry