I. Core Definition and Working Principle

Activated Carbon Boxes are dry waste gas treatment devices that utilize the physical adsorption characteristics of the highly porous structure and high specific surface area of activated carbon to remove organic pollutants, odors, and toxic chemicals from waste gases. Their working principle is divided into two stages:

1. Adsorption processThe exhaust gas is drawn into the chamber by the fan's negative pressure. As it passes through the activated carbon layer, pollutants are captured by the unoccupied molecular attractions or chemical bond forces on the activated carbon surface, coalescing and retained within the pores, while clean gas permeates through the carbon layer and is expelled. For instance, the benzene compounds in paint-spraying exhaust and VOCs (volatile organic compounds) in printing exhaust can both be efficiently adsorbed.
2. Regeneration processOnce activated carbon adsorption reaches saturation, its adsorption capacity can be restored through thermal regeneration (vaporization of pollutants at high temperatures of 300°C) or cold regeneration (gas flow rate and composition control to gasify pollutants at low temperatures), thereby achieving recycling.

II. Structural Design and Material Selection

1. Structural form：

• Drawer-style structureEasier to replace activated carbon, commonly found in small to medium-sized equipment.
• Fixed bed structureSuitable for high-volume applications, such as industrial painting lines.
• Modular designSupports quick scaling to meet various processing requirements.

1. Material Selection：

• CabinetCarbon steel (economy grade), 304/316 stainless steel (corrosion-resistant, suitable for chemical industry)
• Activated CarbonCoconut shell activated carbon (high adsorption efficiency, suitable for low concentration waste gas), coal-based activated carbon (low cost, suitable for high concentration waste gas), honeycomb activated carbon (low resistance, ideal for high airflow applications).

1. Corrosion Protection TreatmentThe inner wall of the box is coated with epoxy resin or fiberglass, extending the life of the equipment.