The core device is a fixed-bed desulfurization tower. It is filled with solid oxidizing desulfurizing agents, such as iron oxide and activated carbon, to filter and convert H₂S.

Dry desulfurization features a simple process, convenient operation, and does not require complex liquid circulation systems. It offers high operational stability and adapts well to fluctuations in working conditions.

It is especially suitable for processing gas with small volumes and low sulfur content. This makes it ideal for remote gas wells and small gas stations.

Wet desulfurization uses gas-liquid absorption. Raw gas enters an absorption tower where it contacts a sprayed desulfurization liquid (such as alcohol-amine or quebracho solution) to rapidly absorb and remove H₂S.

After absorption, the rich liquid enters a regeneration tank under reduced pressure. Air oxidation converts H₂S into sulfur monomers, which are separated as solid sulfur. The restored liquid is then pumped back to the absorption tower.

Wet desulfurization is preferred when dealing with large gas treatment capacities and high sulfur content working conditions, as it provides high desulfurization efficiency at scale.