Design and strength calculation for plug in HF alkylation′s unit
Chai Liping1, Cao Minhong1, Jiang Wei1, Liu Sanhua1, Xu Wanguo2
( 1.Technical and Research Center of Fluid Machinery Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2.Maanshan Iron & Steel Company, Ltd., Maanshan, Anhui 243021, China)
Abstract:The structure of multi-layer and multi-sealed was studied in order to solve the problem of corrosion and leakage for the stopcock in the hydrofluoric acid alkylation unit. Cock and stem were casted with one-piece to reduce design steps and processing. A suitable Ni-Cu alloy material was used for flow passage components, and PTEE/F46 was used for static sealings. Strength calculation was carried out by ANSYS finite element to avoid the stress concentration at design stage. The results show that this plug reduces internal leakage and prevents the external leakage completely.It has function of fire prevention. The plug is anti-corrosion and antileakage strongly, and therefore can be used in the hydrofluoric acid alkylation unit safely and reliably.
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