There are several reasons for excessive hydrocarbons in the main cooling system: incomplete immersion of the main cooling system, poor circulation and flow of liquid oxygen, resulting in local condensation and precipitation of hydrocarbons in certain dead corners; Excessive solid impurities such as carbon dioxide in liquid oxygen exacerbate the accumulation of static electricity in liquid oxygen; During the assay, only the acetylene content was measured, and the content of other hydrocarbons was not measured; Excessive levels of hydrocarbons in the atmosphere; The adsorption efficiency of the molecular sieve adsorber decreases.
Corresponding measures should be taken for the above reasons: the main cooling system must be fully immersed, the circulation of liquid oxygen should be strengthened, and the emission of liquid oxygen should be increased; Reduce the amount of carbon dioxide entering the tower and control the carbon dioxide content in the air after the screening adsorber to below 1Ppm; All hydrocarbons in the main cooling system must be removed in order to promptly address any issues; The air separation unit should be located at the upper air vent to reduce the intake of hydrocarbons. When the carbon content in the atmosphere is high, it is necessary to strengthen the detection of hydrocarbons in the main cooling liquid oxygen for timely handling; Activate the molecular sieve adsorbent. If the molecular sieve adsorbent ages or fails, replace it.
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