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| Thermal Stress and Strength of Steam Drum in Petroleum Refining |
| Received:March 14, 2018 Revised:May 25, 2018 |
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| DOI：10.7643/ issn.1672-9242.2018.05.005 |
| KeyWord:waste heat boiler steam drum thermal stress strength analysis |
| Author | Institution |
| CHEN Sun-yi |
The Challenge Petrochemical Machinery Corporation, Maoming , China |
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| Abstract: |
| Objective To analyze how thermal stress affects the strength of steam drum in allusion to selection of two kinds of technology standards on waste heat boiler. Individual stress and total stress of steam drum were calculated according to pressure vessel standard or boiler standard respectively, based on comparing structural features of waste heat boiler in petroleum refining. Results The total axial stress of steam drum calculated according to boiler standard was 84.458 MPa, the total axial stress calculated according to pressure vessel standard was 37.521 MPa, the former was 125% greater than the latter. Total hoop stress at inside angle of tube calculated according to pressure vessel standard was 257.3 MPa, 5.4% more than 244.16 MPa, which was calculated according to boiler standard. In general, the total stress of each kind was less than the allowance stress of structure material. Conclusion The drum of case may not be designed according to boiler standard. The terms of supervision regulation on how to select design standard of steam drum of waste heat boiler are reasonable and reliable. |
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