Fuel gas heating furnace

A fuel gas heating furnace, comprising:

• a gas chamber assembly including a base, a supporting plate assembly, an outer cover plate, a door panel mechanism, and a combustion device, wherein the supporting plate assembly and the base are arranged vertically along the upright direction of the fuel gas heating furnace, the base, the supporting plate assembly, the outer cover plate, and the door panel mechanism define a gas containing chamber, and the combustion device has a flame outlet;
• a heat transfer assembly positioned above the gas chamber assembly along the upright direction and including a plurality of grid members, a plurality of first supporting pillars, and a cover tube, wherein the lower end of the cover tube faces the flame outlet, the lower ends of the first supporting pillars are connected to the supporting plate assembly, and the grid members are arranged around the cover tube and respectively interspersed between the first supporting pillars;
• and
• a radiation assembly arranged above the heat transfer assembly along the upright direction and including a flow guiding mechanism, a heat dissipation cover, a top cover mechanism, and a flow limiting plate, wherein the flow guiding mechanism has a bottom plate and a peripheral wall connected around the bottom plate, the peripheral wall is provided with a plurality of outflow holes, the upper ends of the first support pillars are connected to the bottom plate, the heat dissipation cover faces the upper end of the cover tube, is located inside the flow guiding mechanism, and surrounded by the peripheral wall, the top cover mechanism covers the upper side of the peripheral wall along the upright direction, the flow limiting plate is arranged above the peripheral wall along the upright direction and surrounds the top cover mechanism, and the flow limiting plate extends outward along a first direction perpendicular to the upright direction.