【Ethylene Tank Farm Technology】Why is pre-cooling necessary when filling an ethylene spherical tank for the first time?
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Why is pre-cooling necessary when filling an ethylene sphere tank for the first time? When ethylene is first introduced into an ethylene tank, it comes from production facilities or is purchased as low-temperature ethylene. When liquid ethylene is directly fed into a tank at lower pressure, the liquid phase of ethylene absorbs a large amount of heat, resulting in a sudden sharp increase in temperature differences within the tank. The temperature of the tank drops rapidly, and it may exceed its maximum allowable temperature, thereby damaging the tank. Therefore, the ethylene tank must be pre-cooled before feeding. Pre-cooling is carried out in two steps: gas-phase pre-cooling and liquid-phase pre-cooling, to ensure that the temperature of the spherical tank drops at a rate of 5°C/h, thereby preventing brittle fracturing of the tank due to rapid temperature changes.
Pre-cooling is required when filling an ethylene sphere tank for the first time in order to prevent the tank from cooling down rapidly due to large temperature differences, which could lead to damage such as cracking. By using both gas-phase pre-cooling and liquid-phase pre-cooling, the rate of temperature drop can be controlled to ensure the safety of the tank. .