Required materials and dimensions: 1 old iron drum, 1 40W-60W fan, 2 switches, 2 tee joints, pipe fittings with a diameter of 1 inch, lengths are prepared according to the drawings, and 1 simple gas The production cost of the chemical furnace does not exceed 100 yuan.
It is best to use large iron drums, and weld and cut the relevant parts of the iron drums according to the requirements of the drawings.
