Environment-friendly flue gas waste heat recycling boiler

The environment-friendly flue gas waste heat recycling boiler comprises a fixing support, a heating boiler and a preparation boiler are fixedly connected to the top of the fixing support, and heat exchange devices are fixedly connected to the interiors of the heating boiler and the preparation boiler; the part, located between the heating boiler and the preparation boiler, of the top of the fixing support is fixedly connected with a control device. The control device comprises a control disc and a gas inlet pipe arranged at the bottom of the control disc, the top of the gas inlet pipe is communicated with the interior of the control disc, and the two sides of the control disc are communicated with a first gas pipe and a second gas pipe respectively; the rotating block is of a circular structure, and the check block is arranged on the side face of the rotating block. According to the environment-friendly flue gas waste heat recycling boiler, the situation of energy waste caused by direct emission of flue gas i