Abstract: A gas purifier is disclosed for removing solid and liquid particles and to control humidity and volatile concentration in a gas stream. The device comprises of a plurality of vane-baffle elements. Each element comprising of a planar vane having a L-shaped cross section and a tubular baffle having a G-shaped cross section, wherein the baffle is attached to the vane forming a vane-baffle element. Each tubular baffle is annular allowing a secondary fluid to flow through it. A plurality of zig-zag shaped baffled partitioned are formed by attaching a plurality of vane-baffle elements to each other. A plurality of gas-stream passage ways are formed by vertically aligning said plurality of zig-zag partitions at a predefined partition spacing.