Heating heat preservation cabinet

The utility model discloses a heating and heat preservation cabinet, which comprises a heating cabinet and an electric control cabinet, wherein the heating cabinet is used for intensively heating gas which is pre-connected into a blowtorch; the electric control cabinet is arranged above the heating cabinet and is used for controlling the heating temperature of the heating cabinet; a pipeline and a heating mechanism are installed in the heating cabinet, and a first heat preservation structure is laid on the inner wall of the heating cabinet. The preheating device is mounted at the front end of an inlet of the blast burner for flame hydrolysis reaction, gases such as H2, O2, Ar and the like connected into the blast burner are intensively preheated and insulated, so that the temperatures of gases in each branch are preheated to 30-85 DEG C before the gases enter the blast burner, the adverse influence of the H2 and O2 gases on the flame temperature due to the change of the environment temperature is reduced, and