Integrated bunch type radiant boiler and preheating boiler mixed heat recovery device

The invention relates to an integrated bunch type radiant boiler and preheating boiler mixed heat recovery device, which comprises a pressure shell, a synthesis gas inlet, a radiation heat exchange component, a desuperheater component, a slag basin, a heat convection component, and a synthesis gas outlet, wherein the synthesis gas inlet is formed in the top of the pressure shell; the synthesis gas outlet is formed in the upper end of the side wall of the pressure shell; the radiation heat exchange component is longitudinally fixed in the middle of the pressure shell; the heat convection component is arranged between the radiant heat exchange component and the pressure shell; the desuperheater component is fixedly arranged below the heat convection component; and the slag basin is positioned at the lower part inside the pressure shell. The heat recovery device can effectively absorb sensible head in the coarse synthesis gas to generate high-pressure steam or intermediate-pressure steam for power generation or preheating other working media, so as to greatly improve the whole source utilization ratio, and achieve high energy recovery utilization ratio. The whole size of the exhaust boiler can be effectively reduced; manufacturing, transportation and installation are convenient; and the dust deposition problem at the heat convection surface can be eliminated.