Double desulfurization device and method for gases from landfill

The invention discloses a double desulfurization device for gases from a landfill. In the landfill, the content of H2S is less than the content of CO2 and CH4 in the gases from the landfill; in such a double desulfurization process for the gases from the landfill, the activated carbon adsorption and a chemical oxidation LO-CAT process can be selected; the desulfurization device mainly comprises two main routes of physical absorption and chemical oxidation; benign activated carbon is adopted for the physical adsorption and can be repeatedly used for 20 to 30 times; after the activated carbon adsorption is completed, elemental sulfur is separated out by using a retort gas in a chemical oxidation procedure; in the chemical oxidation procedure, an absorption tower, a regeneration tower, a gas-liquid separator, a filter, a buffer tank, an electrolytic tank, a distillation tower, a liquid concentration tester, an air-blaster and the like are used. The invention discloses a double desulfurization method for the gase