U-shaped tubular heat exchanger

The invention discloses a U-shaped tubular heat exchanger. The U-shaped tubular heat exchanger comprises a tube plate and a plurality of U-shaped heat exchange tubes, wherein tube openings of the U-shaped heat exchange tubes face upwards and are vertically arranged on the tube plate in a penetrating mode, and the tube plate is provided with a first quadrant, a second quadrant, a third quadrant and a fourth quadrant which are divided by a transverse axis and a longitudinal axis,. The U-shaped tubular heat exchanger is characterized in that the tube openings of the U-shaped heat exchange tubes are distributed in different quadrants respectively. Heat exchange areas of the U-shaped tubular heat exchanger comprise the U-shaped first heat exchange area and the U-shaped second heat exchange area which are symmetrical along the transverse axis and provided with the openings facing the transverse axis, so that the bending radius of the U-shaped heat exchange tube at the innermost side can be large, high-temperature,