Dual-purpose gas producer using coal and firewood

The utility model discloses a coal-firewood dual-use gas furnace. A gas-exhaustion pipe 31 is connected to the lower part of a pressing cover 2 arranged on the upper part of a furnace body 1, a ring-shaped shuting 21 is arranged at the junction of the upper pressing cover 2 and the gas-exhaustion pipe 31, a smoke-discharging pipe 29 is connected to the upper end outside the gas-exhaustion pipe 31, a water cycling filter 22 is connected to the lower end outside the gas-exhaustion pipe 31, a gas-exhaustion valve 3 is arranged on the upper part of the position where the outer side of the furnace body is communicated with a water jacket 34, a boiled-water valve 6 is arranged at the side face, a straight pipe on the inner wall of the furnace body 1 is communicated with a heat radiator 17 and the cycling water jacket 34 on the inner wall of the hearth, an external-connection pipe is communicated with a heater 14, a fuel leakage-prevention device 25 and a furnace-bar locking device 27 are arranged on the upper part of a furnace bar 26 at the bottom of the furnace body, a coke-removing door 7 and a coke-against rod 24 are arranged on the side surface of the furnace bar 26, an air inlet 9 arranged at the left side on the same position at the lower part of the furnace body 1 is connected with a ventilator 28, an ash-removing door 10 is arranged at the right side and a return-air baffle 8 is arranged on the air inlet pipe 9. The utility model can produce air and feed the fuel consecutively, and remove the coke rapidly, and have simple operation, high flame temperature, high air-production rate and less environment pollution.