|
| Catalytic Cracking Unit Corrosion and Protection |
| Received:October 05, 2020 Revised:October 16, 2020 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2020.11.007 |
| KeyWord:catalytic cracking corrosion stress corrosion erosion corrosion monitoring anti-corrosion measures |
| Author | Institution |
| ZHANG Jun-meng |
Petro China Sichuan Petrochemical Co. Ltd., Chengdu , China |
| XIAO Yang |
Petro China Sichuan Petrochemical Co. Ltd., Chengdu , China |
| MENG Ling-dong |
Petro China Sichuan Petrochemical Co. Ltd., Chengdu , China |
| ZHOU Ming-hui |
Petro China Sichuan Petrochemical Co. Ltd., Chengdu , China |
| CHEN Dong-yan |
Petro China Sichuan Petrochemical Co. Ltd., Chengdu , China |
|
| Hits: |
| Download times: |
| Abstract: |
| The work aims to study the problems existing in the residue catalytic cracking unit and solve the problem of shutdown of the device due to corrosion damage. Through the analysis and research on the typical corrosion-prone parts of the device, the morphology of the valve erosion of the regenerator discharge line, the dew point corrosion of the expansion joint, the bolt fracture and the corrosion of the heat exchanger tube bundle port were analyzed in detail. According to different corrosion mechanisms, relevant effective measures were taken. Based on study on the above-mentioned typical cases, four daily anti-corrosion measures for the catalytic cracking unit were proposed. The main measures were enhanced corrosion monitoring, enhanced construction quality supervision, enhanced management of additives, and smooth operation of production operations. The three-finger electrochemical and inductive corrosion monitoring methods were used to monitor the easy-corrosive parts such as the top oil and gas system of the fractionation tower, the top circulation system of the fractionation tower, the rich gas cooling system, and the absorption stabilization system of the catalytic cracking unit, so as to achieve monthly summary analysis. Corresponding importance was attached to according to the corrosion rate, and corresponding anti-corrosion measures were taken. Identifying the root cause of corrosion and formulating corresponding countermeasures for corrosion can reduce corrosion rate, reduce equipment damage and thus ensure stable and long-term operation of the device. |
| Close |
|
|
|