Condensing heat exchanger based on jet strengthening

The condensation heat exchanger comprises a shell, a water flow coil pipe is arranged in the shell, a plurality of jet flow pipes are arranged in the shell at intervals and are adjacent to the water flow coil pipe, a main flow smoke inlet is formed in one side of the shell to guide in main flow smoke, and an inlet guide plate is arranged on the inner side of the shell and communicates with the main flow smoke inlet to guide in the main flow smoke. The outlet flow guide plate is arranged on the inner side of the shell and is opposite to the inlet flow guide plate, the outlet flow guide plate is communicated with the smoke outlet, the inlet flow guide plate and the outlet flow guide plate form a main stream smoke section to guide main stream smoke to vertically downwards wash the outer surface of the water flow coil pipe so as to fall off condensate, and the jet flow smoke inlet is coaxially arranged in the main stream smoke inlet to guide in jet flow smoke. The jet flow smoke inlet is communicated with the mul