Immersion type heat exchanger

The utility model discloses an immersion type heat exchanger which comprises a heat exchange cylinder and a coil pipe arranged in the heat exchange cylinder. A connecting flange is arranged at the bottom end of the heat exchange barrel, the bottom of the coil pipe is connected with a first connecting pipe, and the first connecting pipe penetrates through the connecting flange to send out condensate water in the coil pipe. And a drain valve is arranged at a water outlet of the first connecting pipe. According to the immersive heat exchanger, the influences of welding stress and thermal stress are fully considered, condensate water in the coil pipe is used as an outlet of a discharge pipeline through the connecting flange fixed to the heat exchange barrel, stress deformation is avoided, the service life of equipment is prolonged, and risks are reduced. 本实用新型公开了一种沉浸式换热器，包括换热筒体以及设置于所述换热筒体内部的蛇管；所述换热筒体的底端设置有连接法兰、所述蛇管底部连接有第一连接管，所述第一连接管穿过所述连接法兰将蛇管内的冷凝水送出；所述第一连接管的出水口设置有疏水阀。本实用新型的沉浸式换热器充分考虑了焊接应力及热应力的影响，将蛇管内的冷凝水通过固定在换热筒