Attention should be paid to the corrosion of the tube bundle in the constant pressure and reduced pressure units of the petrochemical industry
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The image below shows corrosion on the tube bundle of the atmospheric and vacuum distillation unit’s first-stage heat exchanger in the petrochemical industry. The outer wall of the tube bundle is made of constant-line material (similar to kerosene), and it is operated at a temperature of 180 degrees and a pressure of 0.8 MPa. After more than 2 years of operation, significant coking has occurred in the tube bundle; corrosion of the metal beneath the coked material is a concern, with naphthenic acid being the main cause of this corrosion.
In the petrochemical industry, the heat exchanger tubes in the atmospheric and vacuum distillation units are often exposed to high temperatures and pressures, which facilitates metal corrosion and can lead to coking problems. Under these conditions, the main type of corrosion is naphthenic acid corrosion, which requires regular inspection and maintenance to prevent severe damage to the equipment. .
Thank you for sharing, Nash. The vacuum pump makes a whistling sound: https://bbs.hcbbs.com/thread-5669444-1-1.html (Source: Haichuan Chemical Industry Forum)