【Ethylene Tank Farm Technology】What are the filling capacity and liquid level alarm settings for ethylene spherical tanks?
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What are the filling volume and liquid level alarm settings for ethylene spheres? According to the provisions of TSG21, the loading factor should normally be set at 0.9. Taking a 2000 m³ ethylene sphere tank as an example, its inner diameter is 15700 mm. The low liquid level alarm is set at 2645 mm, the very low liquid level alarm at 1500 mm, the high liquid level alarm at 11957 mm, and the very high liquid level alarm at 12622 mm. The installation height of the level switch involved in the level interlock is 12622 mm. For a 2000 m³ ethylene sphere tank, the reported high fill level is 11957 mm, which corresponds to 76% of its diameter; the volume of the liquid phase at this level is 1735 m³, accounting for 86.7% of the total volume ； The high-reported fill level is 12,622 mm, which is 80% of its diameter; the volume of the liquid fill is 1,823 m³, accounting for 91% of the total volume. Note: The ratio of the filling liquid level height to the ratio of the actual filling volume are not the same.
The filling volume of an ethylene sphere tank is usually 90% of its total capacity; for a tank with a capacity of 2,000 cubic meters, the volume of liquid that can be filled is approximately 1,800 cubic meters. The level alarm settings are as follows: the low level alarm is set at 2645 millimeters, the very low level alarm at 1500 millimeters, the high level alarm at 11957 millimeters, and the very high level alarm at 12622 millimeters. The switch for the level interlock is also installed at a height of 12,622 millimeters. .