What is the nitrogen consumption for the two storage tanks (including large and small breathing)? In cubic meters?
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This post was last edited by Liu Fengrui on 2015-11-24 at 20:41. The annual production volume of the oil product is 20,000 tons; its flash point is -22 °C / -8 °F. There are two 1,000-cubic-meter floating roof storage tanks equipped with nitrogen seals, and the loading pump has a capacity of 60 m3/h. The annual extreme maximum temperature is 36.6 °C, the annual extreme minimum temperature is 3.8 °C, the average annual temperature is 20.8 °C, the average monthly maximum temperature is 27.3 °C, and the average monthly minimum temperature is 12.8 °C. Question: What is the annual nitrogen consumption for these two storage tanks (including both large-scale and small-scale breathing operations), in cubic meters?
Haha, I really don’t know that, ah!
This post was last edited by Liu Fengrui on 2015-11-27 at 11:56. If we don’t take into account the loss due to breathing in terms of tank size, then how should it be calculated? Should it be calculated as 1.07 times the maximum liquid inlet volume of the storage tank? Thank you!
In my personal opinion, under normal circumstances, ignoring deep and shallow breaths, the nitrogen consumption should be calculated based on the amount of liquid discharged from the storage tank for greater accuracy； The gas phase space is filled with nitrogen, and its volume at the specified pressure and temperature should be roughly equivalent to the volume of liquid discharged from the storage tank. Furthermore, a specific analysis is conducted based on the storage tank process flow.
Since you are using an internal floating roof tank, the loss due to minor breathing can be disregarded. The nitrogen consumption is actually calculated based on the amount of fluid entering and leaving the storage tank, which is what is referred to as the large breath. A relatively simple calculation involves knowing the annual turnover volume of the oil product, which allows one to determine the amount of nitrogen consumed accordingly