Relevant indicators of the analysis tower and stabilization tower

The top temperature of the tower is adjusted by controlling the bottom temperature and feed, as well as the reflux rate.

Well, there are different specialties in each field. I’m not very familiar with this tower of yours. Most conventional distillation columns control temperature by regulating the heating and reflux at the bottom of the column. But it’s mainly related to heating. It’s because of the heat source!

The main control system monitors the temperature of the sensitive plates in the desorption tower and the stabilization tower; for example, this applies to tray number 12 in the desorption tower and tray number 10 in the stabilization tower. Attention is also required to the temperature at the bottom and top of the desorption tower. It is generally considered that a minimum temperature should be maintained at the bottom of the desorption tower, as this helps to prevent the accumulation of liquid water there, which could lead to wet hydrogen sulfide corrosion. Furthermore, the temperature at the bottom of the desorption tower is controlled at >107°C, while the temperature of the sensitive plate is kept around 114°C. The stabilizer tower is different from the desorption tower, as the two towers have distinct natures and functions. The stabilizer column requires temperature control of the sensitive plates, with one such control needed for each of the rectification section and the stripping section. The bottom temperature is used as an auxiliary monitoring parameter and does not participate in the control process; it is typically maintained at 170°C. The temperature of the sensitive plate in the stripping section (10#) is controlled at around 180°C. There are many factors that influence the regulation of the stabilizer column; it is not only the temperature at the bottom of the column that needs to be controlled. Examples include the composition of the feed, the reflux flow rate from the top of the column, the temperature of the reflux stream after cooling, the column pressure, and the amount of non-condensable gas (which depends on the proportion of light components in the feed). We keep the top temperature at around 60°C. The operation of the absorption stabilization system is not fixed; it depends to a large extent on the distillation system and the reaction system. These are my personal opinions; please feel free to correct me if anything is inappropriate.

What is a sensitive plate? What’s the point?

It is a tower; there is a temperature distribution from the top to the bottom of the tower, and on certain trays in the distillation section or stripping section, the temperature changes are most significant. In other words, these trays are the most sensitive to external disturbances, which is why they are referred to as sensitive trays. Normal operation proceeds without issues; the sensitivity plate serves to detect significant temperature changes when abnormal factors affect the operation of the tower, thereby allowing for early detection of operational fluctuations.

It depends on the operational metrics you set yourselves; there are procedures to follow

It must be at the bottom of the tower; the reboiler is used to control the temperatures at the top and bottom of the stabilizer tower

What temperature should be controlled? It varies depending on the conditions – factors such as the raw materials and equipment used play a role; the main goal is to ensure that the products meet the required standards