Patent ID: 7748890

Claim:
A gas processing device for mixing a first gas and a second gas, comprising: a first flow passage that said first gas flows through; a second flow passage that said second gas flows through, said second flow passage surrounding a part of said first flow passage so as to cause said second gas to flow around said first flow passage; and a liquid discharge port provided in a lower portion of said second flow passage in the vertical direction of said second flow passage; wherein: at least said part of said first flow passage surrounded by said second flow passage, is provided with a diffusion structure that diffuses said first gas outside, said diffusion structure being provided over the entire length of said part of said first flow passage surrounded by said second flow passage; said diffusion structure is a plurality of hole structures that emit said first gas flowing through said first flow passage in a different direction to the flow direction of said second gas; said hole structures are provided such that the total hole opening area per unit area becomes larger toward the downstream side of the flow direction of said first gas; and said second flow passage comprises in at least one part of said second flow passage an agitating member for agitating said gases.