Heat Exchanger Structure

A heat exchanger comprising:

• a shell with a top and a bottom having a center and a wall;
• multiple exchange tubes disposed in multiple layers from the center of the shell to the wall of the shell inside the shell, each layer of exchange tubes having at least one exchange tube, each exchange tube having two ends and a spiral form with a plurality of windings;
• a first board and a second board arranged in parallel inside the shell, each of the first board and the second board having a plurality of holes, two ends of each exchange tube respectively passing through a hole on the first board and a hole on the second board;
• and
• a first spiral gas tube winding in a same direction with two ends disposed inside the shell, two ends of the first spiral gas tube passing through respectively a hole in the first board and a hole on the second board, the first spiral gas tube having a first wall, the first wall facing towards the bottom of the shell being provided with a plurality of first gas pores, and the first spiral gas tube has a first inlet and a first outlet that respectively communicates with out-source gas.