Complex flow-path heat exchanger having U-shaped tube and cantilever combined coil

Abstract

A complex flow-path heat exchanger having U-shaped tube and cantilever combined coil, which can achieve, in this type heat exchanger, a simple construction, a complex flow of steam within the same one heat exchange shell body, a high heat exchange efficiency, and a low energy loss. The technical gift of the present invention is that, after entering into the heat exchanger, steam firstly effects heat exchange on the U-shaped tube flow path shell side to be cooled and condensed, thereafter entering into flow path tube side of the cantilever combined coil, which are disposed within the same one shell, for a secondary heat exchange, and subsequently flowing out of the heat exchanger after being subcooled. Such steam-water heat exchanger having a complex flow path are advantageous in a small steam flow resistance of the U-shaped tube flow path shell side; a higher condensate water flow velocity in the cantilever combined coils flow path tube; a high heat exchange coefficient; good coordination of the temperature difference fields of the hot and cold fluids in the heat exchanger; and a high heat exchange efficiency. Therefore, the present heat exchanger can be a new generation product relative to the currently-used conventional low-temperature, low-pressure and corrosion-free heat exchangers.

1 . A complex flow path type heat exchanger having U-shaped tubes and cantilever combined coils, characterized in that, the same one fluid has the different flow routes in different flow paths, and in that after entering into the heat exchanger, steam is firstly cooled and condensed on the shell side of U-shaped tubes, then enter into a plurality of groups of cantilever combined coils within the same one shell for a secondary heat exchange, subsequently flows out of the heat exchanger after being subcooled; and in that at first water to be heated is preliminarily heated on the shell side of a portion of a cylinder body provided with cantilever combined boils, then enters into the tube of U-shaped heat exchange tube bundles, in order to be heated up to the desired temperature, thereafter flows out of the heat exchanger through a heated water outlet pipe.  
   
   
       2 . A complex flow path type heat exchanger having U-shapes tubes and cantilever combined coils according to  claim 1 , characterized in that, it comprises a plurality of groups of the cantilever combined coils parallely connected onto the hot medium tube, and in that the cantilever combined coils have a fixed end, an absolutely free end, and a relatively free end, so that vibration can be generated under fluid induction.