The core device of dry desulfurization is the fixed-bed desulfurization tower. It is filled with oxidizing desulfurizing agents, such as iron oxide and activated carbon, to filter and fix the hydrogen sulfide (H₂S).

Dry desulfurization is highly suitable for processing gas with small volume and low sulfur content. It is widely applied in remote gas wells and small gas stations due to its simple process and convenient operation.

Wet desulfurization relies on gas-liquid absorption. The sulfur-containing raw gas enters an absorption tower and contacts a sprayed desulfurization liquid (such as alcohol-amine or quebracho solution), resulting in a chemical reaction that rapidly removes H₂S.

The sulfur-rich liquid enters a regeneration tank under reduced pressure. Air oxidation converts H₂S into sulfur monomers, forming a foam suspension. This foam is extracted, settled, heated, and melted to form solid sulfur for export.

Yes. After the sulfur is separated during regeneration, the desulfurization liquid restores its activity to become poor liquid. It is then pressurized by a pump and returned to the absorption tower for continuous recycling.

Dry desulfurization is simpler, requires no liquid circulation, and offers high stability for small-scale applications. Wet desulfurization is more complex but features a larger treatment capacity and higher efficiency, making it suitable for high-sulfur working conditions.