The reasons for the main cold hydrocarbon exceeding the standard are as follows:
1. The main cooling system is not fully immersed, resulting in poor circulation and flow of liquid oxygen, leading to local concentration and precipitation of hydrocarbons in certain dead corners;
2. Excessive solid impurities such as carbon dioxide in liquid oxygen exacerbate the accumulation of static electricity in liquid oxygen;
3. During the assay, only the content of ethyl acetate was measured, and the content of other hydrocarbons was not measured;
4. The content of hydrocarbons in the atmosphere is too high;
5. The adsorption efficiency of the molecular sieve adsorber decreases.
Quick solutions for the above reasons:
1. The main cooling system must be fully immersed to enhance the circulation of liquid oxygen and increase the emission of liquid oxygen;
2. 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;
3. All hydrocarbons in the main cooling system must be removed in order to promptly address any issues;
4. The air separation unit should be located at the upper air vent to reduce the intake of hydrocarbons. When the content of hydrocarbons in the atmosphere is high, it is necessary to strengthen the detection of hydrocarbons in the main cooling liquid oxygen for timely handling;
5. Activate the molecular sieve adsorbent. If the molecular sieve adsorbent ages or fails, replace it.
