Counter-flow fin plate heat exchanger for gas-gas heat exchange

A counter-flow fin plate heat exchanger for gas-to-gas heat exchange, comprising:

• a plurality of sets of counter-flow fin plates are stacked and fixed in a thickness direction to form a heat exchange unit;
• two air channels are fixed on the heat exchange unit and are respectively connected with one on each side of the heat exchange unit and one of each connected with one of two side openings on an inner channel bending plate of the counter-flow fin plate on both sides of the heat exchange unit;
• a plurality of heat exchange units are laterally stacked and fixed to form a set of heat exchange units;
• a plurality of sets of heat exchange units are stacked in the vertical direction;
• adjacent sets of heat exchange units are connected by a flue gas channel;
• outsides of the plurality of sets of the heat exchange units are fixed by a support frame;
• a heat exchanger housing is arranged outside the support frame;
• air flows along the air channel in the heat exchanger in an S shape.