Abstract
Storage tanks with partition plates are widely used in the petrochemical industry. However, relevant standards do not propose corresponding design criteria and methods for this type of structure, and theoretical design formulas cannot be applied to ensure the reliability of its structure. Therefore, it is necessary to analyze and design the storage tank with a partition plate by using finite elements. This paper studies the problem of buckling depression and cracks in the welded parts of the S-shaped tank with a partition plate during its operation. We used the finite element software ANSYS to analyze the overall strength and stability of the structure and obtain the larger stress area. Based on this, a safe and economical optimization plan is proposed: under the condition of strictly controlling the liquid level difference on both sides of the partition, the tank structure is optimized by adding stiffeners and tie rods. The study revealed that the measure effectively improves the overall rigidity of the tank body and reduces the maximum stress of the structure and enhances the safety performance of storage tank. Additionally, it provides a reference for the structural strength design of storage tanks with partition plates.
Highlights
The liquid level difference between the two sides of partition plate is shown in Figure 6 after 120 days of operation
The results show that the stress of the tank can be reduced by controlling liquid level difference between the contents in both sides of tank with partition plate, but the stress intensity still cannot be met
S-shaped partition plate plate is studied finite element
Summary
A storage tank with a partition plate is an atmospheric pressure vessel, which separates the cylindrical shell to form multiple regions to storage different kinds of liquid contents in a single tank [1]. Compared with other types of storage tanks of the same volume, it has the advantages of more centralized overall layout, smaller floor area, easier tank farm management and lower investment cost It is widely used in petroleum, chemical, pharmaceutical, and other, industries [7]. Under extreme working conditions, that is, when one side of the partition plate is full of materials and the other side is empty while negative pressure exists, the partition plate will bear a large external pressure, which is likely to cause large displacement of the structure of the partition, resulting in overall strength and stiffness problems, strength and buckling failure, affecting the safe operation of the storage tank and causing economic losses [8,9]. The improvement measures for the storage tank compartment to operate according to a certain safe operation curve are proposed
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