Some factories regularly test that the acetylene content in liquid oxygen does not exceed the allowable limit, but still experience multiple explosion accidents. What is the reason for this? According to analysis, there may be several reasons for this:
1) The structure of the main cooling system is unreasonable or some channels are blocked, resulting in poor fluidity of liquid oxygen, causing acetylene to concentrate and precipitate locally in certain dead corners;
2) There are too many solid impurities such as carbon dioxide in liquid oxygen, which exacerbates the accumulation of static electricity in liquid oxygen;
3) The content of other hydrocarbons has not been tested, and the adsorption efficiency of silica gel on other hydrocarbons is relatively low. When the content of hydrocarbons in the atmosphere is high, it is possible to accumulate in liquid oxygen and form the root cause of explosions. Therefore, for larger fully low-pressure oxygen generators, it is necessary to strengthen the analysis of hydrocarbons. The total carbon content in every 1L of liquid oxygen is controlled at:
Alarm limit 30mg/L
Parking limit 100mg/L
DEAR Air Separation has rich project engineering experience and continuously utilizes innovative technologies to optimize equipment energy conservation and safety. It is a major manufacturer and gas supplier of air separation equipment in China.
