Biogas purification and carbon capture and utilization device

The invention belongs to the technical field of biogas purification, and relates to a biogas purification carbon capture and utilization device which comprises a biogas purification unit and a biogas purification unit, the biogas purification unit comprises a biogas compressor and a biogas purification device, an outlet of the biogas compressor is connected with an inlet of the biogas purification device, and the biogas purification unit comprises a first-stage membrane group. The first inlet of the biogas collecting pipe is connected with the second outlet of the biogas purifying device, the second inlet of the biogas collecting pipe is connected with the first outlet of the first-stage membrane group, the biogas collecting pipe is used for storing waste gas generated by the biogas purifying device and the first-stage membrane group, and the outlet of the biogas collecting pipe is connected with the inlet of the biogas compressor. Waste gas generated by the biogas purification device and the first-stage memb