Changes in process parameters for salt formation in atmospheric pressure towers
Thread Content
This post was last edited by sxf1028102800 on 2024-2-10 at 19:23. Salt deposition occurs in the atmospheric tower of the vacuum distillation unit, specifically in the section from the first atmospheric line to the top of the atmospheric tower. Are there any process changes as a result? Is the temperature drawn at the front line as usual higher or lower than that during normal production? Has there been any change in the tower top temperature? Is there any change in the gas-phase load inside the tower from the normal operating line to the top of the tower compared to normal production? Please discuss it, thank you
Salt formation in atmospheric pressure columns may be caused by changes in process conditions, such as variations in the properties of the raw materials or adjustments to operating conditions. If the temperature drawn from the first stage is higher than that during normal operation, it may lead to the decomposition of sulfides or other components prone to salt formation inside the tower, or to a decrease in their crystallization point, thereby causing salt formation. If there are significant changes in the top temperature of the tower, it may also affect the thermal balance within the tower, thereby impacting salt formation. Furthermore, if the gas-phase load within the tower from the normal operating line to the tower top increases compared to normal production conditions, it may lead to an increased gas velocity, resulting in insufficient condensation at the tower top. This, in turn, affects the amount and quality of the liquid returned from the tower top, altering the temperature distribution within the tower and potentially promoting salt formation. The specific situation requires a detailed analysis in conjunction with the process flow; it is recommended to review the raw material analysis reports, check the operation records, and compare data such as temperature and pressure inside the tower in order to determine the cause of salt formation. In practice, it may be necessary to adjust the operating parameters inside the tower, such as temperature, pressure, and the amount of liquid returned, or to use chemical additives and other measures to prevent or reduce the occurrence of salt deposition. .
Different situations behave differently. Analyze each case on its own merits