Heating furnace

The utility model relates to the technical field of heating furnaces, and discloses a heating furnace which comprises a furnace body, a hand valve, a cylinder and an annular brush, a water tank and a gas collecting tank are sequentially and fixedly installed on the side wall of the furnace body in the horizontal direction, a combustor is fixedly installed on the lower surface of the inner side of the furnace body, and a workbench is horizontally and fixedly installed at the output end of the combustor. The heating furnace solves the problems that some waste gas treatment equipment in the current market directly discharges waste gas into the atmosphere after simply treating the waste gas, the safety performance is poor, high-temperature waste gas can damage the environment to a certain extent, the waste gas treatment effect is poor, the working efficiency is low, and the waste gas treatment efficiency is low. The problems that a large number of granular impurities can be generated in waste gas, waste gas parti