How does the absorption system adjust?
Thread Content
Analyze the impact of the feeding positions of the absorbent and the supplementary absorbent in the absorption tower on the absorption efficiency What impact does the quality of the absorbent have on the absorption efficiency of the absorption tower? What is the impact of the quality of lean absorption oil on the absorption efficiency of the reabsorption tower? What causes the high C3-C4 content in the dry gas? How does it need to be adjusted? What causes the high content of gasoline components above C5 in dry gas? How does it need to be adjusted?
It is recommended to start with the basic principles, establish the initial sequence of operating conditions, and set the amount of material to be added step by step; in this process, the operating conditions are established gradually, first through resistance and then through purity. First, learn following the process, connecting the principles of individual units to those of the entire process. Once understood and mastered on the basis of the principles of operating procedures, the rest will not be a problem.
First, understand the principle of each tower; it will be beneficial to do so
1. Feed location: To ensure stable gasoline quality and effective absorption, feeding is required at the top； The absorbent is crude gasoline, which contains C1-C4 components that can be easily carried away; therefore, it cannot be fed from the top, and is usually fed at the 10th layer ；
2. Quality of the absorbent: The amount of the component to be absorbed present in the absorbent directly affects the absorption efficiency, that is, the saturation level.
4. High C3C4 content in the dry gas: First, the absorption dose is insufficient; increase the supplementary absorption dose. Second, the absorption temperature is too high; reduce the feed and tower temperatures. Third, the feeding position of the absorbent is incorrect – the supplementary absorbent is placed at the top while the actual absorbent should be at the bottom
5. High C5 level is due to insufficient supplemental absorption dose