Activated carbon adsorption tower is a common waste gas treatment equipment, its main function is to remove harmful substances in the waste gas through adsorption, so as to achieve the purpose of purifying the waste gas. In practical applications, different types and sizes of activated carbon adsorption towers have different adsorption effects for treating different types and concentrations of waste gas. This paper will discuss this problem from two aspects of adsorption principle and common models and sizes.

Adsorption principle

The adsorption principle of the activated carbon adsorption tower is based on the chemical and physical interaction between the adsorbent and the harmful substances in the waste gas, such as the hydrogen bond on the surface of the adsorbent, the pore size of the adsorbent, and the chemical functional groups on the surface of the adsorbent can affect the adsorption effect. In the process of exhaust gas passing through the adsorption tower, harmful substances will be adsorbed on the surface of the adsorbent, and over time, the adsorption site on the surface of the adsorbent will become more and more saturated, so that the concentration of adsorbed substances in the exhaust gas will gradually decrease. The selection of adsorbent and the design of adsorption tower will affect the adsorption effect, such as the specific surface area of adsorbent, pore size, filling density, etc., will have a certain impact on the adsorption effect.

Common models and sizes

1. Fixed bed adsorption tower: fixed bed adsorption tower is a common type of adsorption tower, its interior is filled with adsorbent, exhaust gas through the tower will be adsorbent, to achieve the purpose of purification. The adsorption effect of the fixed bed adsorption column is affected by the specific surface area, pore size and filling density of the filling material, while the size of the column has relatively little influence on the adsorption effect. Under normal circumstances, the fixed bed adsorption tower is suitable for the treatment of low concentration of harmful gases, and is not suitable for the treatment of high concentration of waste gas.

2. Fluidized bed adsorption tower: Fluidized bed adsorption tower is a type of adsorption tower with fluidizing medium, and its waste gas treatment effect is better than that of fixed bed adsorption tower. The design of the fluidized bed adsorption tower mixes the adsorbent with the fluidizing medium to form a fluidized bed, which makes it easier for the exhaust gas to contact the adsorbent when flowing through it, thus achieving a better adsorption effect. Fluidized bed adsorption tower is an ideal equipment for the treatment of high concentration waste gas.

3. Rotary adsorption tower: The rotary adsorption tower is a different type of adsorption tower from the fixed bed and the fluidized bed, and its main feature is that it can make up for the shortcomings of the fixed bed and the fluidized bed, so as to achieve better purification effect. The working principle of the rotary adsorption tower is through the rotating movement of the rotor, so that the adsorbent is constantly in the flow, easier to contact with harmful substances in the exhaust gas, so as to achieve better adsorption effects. Although the treatment effect of the rotary adsorption tower is relatively good, its manufacturing cost is relatively high, and it is generally suitable for high-demand occasions.

In general, there are certain differences in the adsorption effect of different types and sizes of activated carbon adsorption towers. When choosing an adsorption tower suitable for your own waste gas treatment needs, you need to consider the advantages and disadvantages of different types and sizes of adsorption towers to determine the most suitable for your own waste gas treatment equipment.