YYQ gas organic heat carrier heating furnace boiler has a compact heating surface, the heating surface is composed of a plurality of densely arranged disc tubes, the inner coil is a radiation heating surface, and the outer layer of the middle layer, the outer coil and the inner coil constitutes convection heating. surface. The fuel burns and releases heat in the combustion chamber composed of the inner coil, and after the radiation receiving surface absorbs most of the heat, the high-temperature flue gas enters the convection heating surface and exchanges heat. The low temperature flue gas is directly discharged from the boiler flue gas outlet to the chimney and discharged into the atmosphere.