I. Core Definition and Working Principle

An activated carbon box is a dry waste gas treatment device that utilizes the physical adsorption characteristics of the porous structure and high specific surface area of activated carbon to remove organic pollutants, odors, and toxic chemicals from waste gases. Its 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 flows through the activated carbon layer, pollutants are captured by the attractive forces of the unsaturated molecules on the carbon surface or by chemical bonding, coalescing and being retained in the pores, while clean gas passes through the carbon layer and exits. For example, benzene compounds in paint-spraying exhaust and VOCs (volatile organic compounds) in printing exhaust can be efficiently adsorbed.
2. Regeneration processOnce activated carbon reaches adsorption saturation, its adsorption capacity can be restored through thermal regeneration (vaporizing pollutants by baking at 300℃ high temperature) or cold regeneration (gas flow rate and composition control to gasify pollutants at low temperature), thereby achieving recycling.

II. Structural Design and Material Selection

1. Structural form：

• Drawer-style structureEasy 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 rapid expansion to meet various processing requirements.

1. Material Selection：

• CasingCarbon steel (economy), 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 (cost-effective, suitable for high concentration waste gas), honeycomb activated carbon (low resistance, ideal for high airflow scenarios).

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