The invention relates to a double-circulation heat exchange device of an oven of a high-speed vertical enameling
machine. The device comprises an oven
hearth and a heating
catalysis area, the heating
catalysis area is connected with a
hearth evaporation area via a circulating fan driven by a motor, and leads to a hot air distribution
pipe, the end portion of the hot air distribution
pipe is provided with an outlet adjusting
air door, and the outlet of the hot air distribution
pipe is orientated to a enameled wire direction channel; the heating
catalysis area comprises a primary before-catalysis
electric heating area, a primary catalysis chamber, a primary post-catalysis supplementary heating area and a secondary catalysis chamber, each of the primary before-catalysis
electric heating area and the primary post-catalysis supplementary heating area is provided with multiple
electric heating pipes, each of the primary catalysis chamber and the secondary catalysis chamber is provided with an inclined catalysis plate; and the hot air distribution pipe is provided with an
exhaust gas input port, the
exhaust gas input port is connected with a
heat exchanger, the
heat exchanger is connected with a heat exchange pipe of an
evaporation area via a connection pipe, and the end portion of the heat exchange pipe of the
evaporation area is provided with a waste suction inlet connected with an exhausting blower fan.