Selection principles for absorption towers

We usually use bulk packing. For tubular distributors, it’s best to provide detailed information, such as what materials are being absorbed. There is a big difference between those used for environmental protection purposes and those used in production

Use materials for exhaust gas absorption. The non-condensable gases after absorption are washed and then vented. Silicone polymer materials.

Plate towers, packed towers, and others can all meet the requirements. The principles are efficiency, energy savings, and low operating costs.

It was said upstairs that both are acceptable; could you explain in detail the differences between them and their respective features?

The following indicators need to be considered: 1. High production capacity. That is, the amount of material processed per unit time per unit tower cross-section ； 2 The separation efficiency is poor. A plate tower refers to a situation in which each layer of plates achieves a high degree of separation ； A packed tower refers to the high degree of separation achieved per unit height of the packing layer ； 3. It has high operational flexibility. That is, when the ratio of the maximum gas velocity load to the minimum gas velocity load is high, normal operation can be maintained even when there are large fluctuations in the surface gas velocity load ； 4 Low fluid resistance. That is, the pressure drop of the gas as it passes through each tray or unit height of packing is small ； The 5-tower structure is simple in design, low in cost, easy to install, convenient to maintain, and reliable in operation.

Design and selection of the absorber tower, the main equipment in flue gas desulfurization processes. The .DOC file cannot be uploaded; you can click on the link to download it yourself, but it will take some time as the website loads slowly. Loveliness: The password for decompression is indicated in the red text at the bottom of the website. This post was last edited by Chuangxin Filler on 2009-2-17 at 16:57

In absorption towers, attention must be paid to the choice of absorbent; Henry’s law is based on the principle that similar substances dissolve in each other. Packing towers and plate towers each have their advantages and disadvantages. When using a liquid to absorb components from a gas, I believe plate towers are the better choice. Plate towers offer greater operational flexibility. However, it is important to keep in mind that absorption is an exothermic process, during which heat is released as a result of dissolution. Therefore, it is necessary to implement mid-stream recycling to remove this heat and thereby enhance the absorption effect; thus, the design of the recycling system is very important. In conventional heat removal, material is generally drawn from the upper tray, removed there, and then returned to the lower tray; essentially, all of the material is taken out. The challenge lies in determining the amount of material on that tray. This is a very difficult issue; in practice, many operators rely on experience when carrying out these operations. When the load is low, such approaches are not a problem, but when the load is high or even exceeds the capacity limits, these methods lead to issues, resulting in reduced absorption efficiency and even substandard product quality

A friend on the eighth floor said that both packed towers and plate towers have their own advantages and disadvantages; could we discuss this in more detail? It seems that packed towers tend to get clogged, while plate towers have a lower absorption efficiency.

Comparison between packed towers and plate towers: (1) Packed towers have a narrower operating range and are particularly sensitive to changes in liquid load. When the liquid load is low, the filler surface cannot be properly wetted, resulting in a sharp decline in mass transfer efficiency ； When the liquid load is too high, flooding is likely to occur. Plate towers have a wide operating range. (2) Packed towers are not suitable for handling materials containing solid suspensions, whereas certain types of plate towers (such as large-pore cross-flow plate towers) can effectively handle such materials. Furthermore, cleaning a plate tower is also easier than cleaning a packed tower. (3) When cooling is required during the gas-liquid contact process to remove reaction heat or heat of solution, the packed tower becomes structurally complex due to the issue of liquid distribution, whereas a plate tower allows cooling coils to be easily installed on the plates. ` (4) The diameter of the packing tower can be very small. The diameter of a plate tower is generally not less than 0.6 m. (5) The design of plate towers is relatively accurate and reliable. The safety factor is low. |(6) When the tower diameter is small, the packed tower is inexpensive due to its simple structure. (7) Packing towers are suitable for systems that tend to form foam and corrosive systems, as the packing helps to limit and break down foam; porcelain packing can be used in such cases. (8) Packed towers are suitable for thermosensitive systems, as the liquid holdup in packed towers is lower than that in tray towers, resulting in a relatively shorter residence time of the material within the tower. (9) The pressure drop of a packed tower is lower than that of a plate tower, making it more suitable for vacuum operation

I would like to ask whether the selection of the tower is a matter related to the process or to the equipment