Absorption tower issues

You can roughly understand it this way. The prerequisite is that the gas velocity in the empty tower has already been determined. For example, in a packed absorption tower: there are two criteria for selecting the tower diameter. The first is the production capacity, and the second is the selected gas velocity in the empty tower. First, the void space velocity at the flooding point is calculated using the relationship between the flooding point and pressure drop. Then, an operating void space velocity is selected (50–80% of the void space velocity at the flooding point), and the formula for calculating the tower diameter is as follows: D = (4Vs/3.14u0)1/2, where Vs is the gas volume flow rate and u0 is the operating void space velocity

Turbulent ball tower: It is a special type of packed tower, in which the packing inside the tower is in motion during operation to enhance the absorption process. A certain amount of lightweight spherical filler (with a diameter of 29–38 mm) is placed between the grills inside the tower; the absorbent is sprayed from the top of the tower, wetting the surface of these spheres. Gas enters from the bottom of the tower, causing the spheres to be lifted and rotate turbulently. Due to the thorough contact between the gas, liquid, and solid phases, the liquid film on the surface of the spheres is continuously renewed, thereby increasing the driving force for absorption. Improved absorption efficiency. 　　This tower is easy to manufacture, install, and maintain, and its operating range can be adjusted by using balls of different sizes and weights. This tower has a large air handling capacity; the gas velocity in an empty tower ranges from 1.5 to 6.0 m/s, the spray density is between 20 and 110 m3/(m2·h), and the pressure loss is 1,500 to 3,800 Pa. It is also capable of handling dust-containing gases. Its drawback is that the plastic balls cannot withstand high temperatures; they tend to crack (usually within 0.5 to 1 year) and need to be replaced frequently, resulting in high costs. 　　3. Plate tower A plate tower is equipped with layers of plates inside the tower, with the liquid entering from the top of the tower. Gas enters from the bottom of the tower, and the mass and heat transfer between gas and liquid occur on each tray. There are many types of plate towers. They can be roughly divided into two categories: one is the downcomer type, such as bubble column towers, sieve plate towers, floating valve towers, S-shaped single-flow plate towers, tongue plate towers, and floating jet towers ； Another category consists of cross-flow plate columns, such as cross-flow grid plate columns (trickling plate columns), corrugated cross-flow plate columns, diamond-shaped slotted plate columns, short-tube cross-flow plate columns, etc.