Control of the gas phase temperature on the herringbone baffles in the fractionation tower and the temperature of the slurry returning to the tower

The control ranges for the gas phase temperature on the herringbone baffles of the fractionation tower and the temperature of the slurry returning to the tower vary depending on the specific process flow and equipment parameters. Under normal circumstances, the gas phase temperature is controlled between 50–100°C, while the temperature of the oil slurry returning to the tower is controlled between 120–180°C. The purpose of these temperature controls is to ensure the smooth progress of chemical and physical reactions in the distillation tower, thereby improving product quality and yield. The specific temperature control range needs to be determined based on practical operational experience and process requirements. .

The vapor temperature of the herringbone baffle is generally between 380 and 395, while the temperature of the slurry returning to the tower is around 280.

You’re not talking about the temperature of the catalytic fractionation tower, are you?

The vapor phase temperature of the wedge baffle is controlled at 380–390°C, while the temperature of the oil slurry returning to the tower is only 280°C; this indicates that the circulation volume of the oil slurry returning to the tower in your plant is not high, right? Also, can the chevron baffle prevent coking at such a high gas phase temperature?

This post was last edited by ↘Great Love Needs No Words↘ on May 26, 2023, at 08:24. Regarding the control of the gas-phase temperature and the temperature of the oil slurry returning to the fractionator: The gas-phase temperature is determined by the heat removal process within the fractionator. Several key points must be kept in mind: 1. Maintain a sufficient circulation rate of oil slurry (as per design specifications). When returning the slurry to the bottom of the tower, ensure that the bottom temperature remains below 350°C; excessively high temperatures can accelerate coke formation. When returning the slurry to the upper part of the tower, keep the temperature at the chevron baffles below 370°C; excessive temperatures may lead to an increase in the dry point of diesel fuel, while an excessive volume of gas could potentially damage the chevron baffles. Ultimately, the appropriate temperatures should be determined based on operational experience related to the plant’s load conditions.

The temperature of the diagonal baffle is around 330–350, while the temperature of the slurry returning to the tower is around 250. Since the processing capacities and operating conditions vary from one unit to another, the control temperatures will also differ