Taizhou injection molding machine exhaust gas treatment equipment activated carbon adsorption box manufacturer

Core adsorption mechanism 12

1. Physical adsorption

There are a large number of micropores on the surface of activated carbon (with a specific surface area of 500-1700m%/g), which adsorb gas molecules (such as benzene, toluene, etc. VOCs) in the pores through van der Waals forces. This process is reversible and is influenced by temperature and pressure: the adsorption capacity is stronger under low temperature and high pressure conditions.

Example: When exhaust gas passes through an adsorption box, pollutant molecules are "captured" by activated carbon capillaries, similar to sponge water absorption. 2. Chemical adsorption

Some pollutants (such as hydrogen sulfide) react chemically with the surface of activated carbon to form stable compounds. This process is irreversible and requires thermal regeneration 9 (at a high temperature of approximately 300 ℃) to remove.

2、 Workflow

1. Introduction of exhaust gas

The exhaust gas driven by the fan enters the box and is first filtered through a pre filter to remove large particle impurities. 2. Gas solid contact

The exhaust gas passes through the activated carbon layer (granular or honeycomb), where pollutants are adsorbed and purified gas is discharged from the outlet.

3. Regeneration/replacement

After saturation, the adsorption capacity of activated carbon can be restored through hot regeneration (high-temperature desorption) or cold regeneration (gas blowing), or new activated carbon can be directly replaced.

3、 Key influencing factors

Activated carbon structure: The more micropores and the larger the specific surface area, the higher the adsorption efficiency (such as honeycomb shaped activated carbon with lower resistance).

Pollutant characteristics: Non polar substances (such as benzene derivatives) are more easily adsorbed than polar substances, and high boiling point substances are preferentially captured.

Operating conditions: When the temperature is below 40 ℃ and the exhaust gas concentration is moderate.

4、 Typical application scenarios

Suitable for industries such as chemical, coating, pharmaceutical, etc., it can handle VOCs, harmful gases, etc., with a purification efficiency of over 90%.