Device for purifying and recycling methane and carbon dioxide from landfill gas

The present invention discloses an apparatus for purifying and recovering carbon dioxide from methane, landfill gas, the apparatus is pretreated landfill gas through a pressure swing adsorption carbon dioxide and methane; including pre-processing unit, a variable pressure swing adsorption unit, a multi-stage pressure swing adsorption unit and a carbon dioxide purification unit. The present invention is isolated and purified landfill gas into CH4 and CO2 gas to two high purity products, make full use of the energy, environmental pollution and the greenhouse effect may be prevented landfill gas directly into the atmosphere caused; its high degree of automation technology, having compact, desulfurization, dehydration, purification effect characteristics. Further, the apparatus of the invention designed in the exhaust gas reflux system to achieve "zero emissions."