High-temp. sensible heat recovery assembling type heat-exchanger

The utility model relates to a high temperature sensible heat recycling combined heat exchanger, mainly aiming at solving the problems that the occupied area is wide, the connecting pipelines are long, the pressure dropping loss of the pipelines is large and the loss of the heat energy of the pipelines is large since the heat exchangers are independently placed in the prior art. The utility model adopts the method that the heat exchanger in the high temperature section, the heat exchanger in the middle temperature section and the heat exchanger in the low temperature section are connected with each other by short drums; central lines of the heat exchanger in the high temperature section and the heat exchanger in the middle temperature section form an angle of 90 to 135 degrees; and the central lines of the heat exchanger in the middle temperature section and the heat exchanger in the low temperature section form an angle of 135 to 180 degrees. The technical proposal that the short drums that connect the heat exchanger in the high temperature section and the heat exchanger in the middle temperature section are provided with waveform expansion nodes solves the problems of the previous heat exchangers. The utility model can be applied in the industrial production where ethylbenzene dehydrogenation is used to produce styrene.