Spray type flue gas waste heat recycling device

The invention relates to the technical field of flue gas recycling and discloses a spray type flue gas waste heat recycling device. The spray type flue gas waste heat recycling device comprises a flue gas waste heat deep-recycling unit and a flue gas purifying unit. The flue gas waste heat deep-recycling unit comprises a main tower body, a first heat exchanger and a second heat exchanger. A water source is connected with the second heat exchanger and the first heat exchanger through water inflow pipes. The main tower body comprises a condensation water collection segment and a spray heat exchange segment. Fuel gas enters the spray heat exchange segment through a fuel gas pipe. The first heat exchanger is arranged in the fuel gas pipe. The condensation water collection segment is connected with the second heat exchanger through a water outflow pipe. The fuel gas purifying unit comprises an oxidization device communicated with the fuel gas pipe. According to the spray type fuel gas waste heat recycling device, the fuel gas waste heat deep-recycling unit and the fuel gas purifying unit are arranged so that fuel gas waste heat can be recycled in a graded manner and pollutants in fuel gas can be purified, and the fuel gas waste heat deep-recycling function and the fuel gas purifying function are integrated in a coordinative manner.