L-shaped shell and tube heat exchanger

The invention relates to an L-shaped shell and tube heat exchanger, and belongs to the technical field of industrial heat exchangers. According to the technical scheme, the heat exchanger comprises an upper tube plate (2), a heat exchange chamber shell (3), a heat exchange piece (4) and a lower tube plate (8), wherein the upper tube plate is used as an inlet of a high-temperature medium; one end of the heat exchange piece arranged in the heat exchange chamber shell is fixed on the upper tube plate, and the other end of the heat exchange piece is fixed on the lower tube plate; and the heat exchange piece is communicated with the space outside the upper tube plate and the lower tube plate. The heat exchanger is characterized in that: the heat exchange piece is bent in the heat exchange chamber shell and arranged in the heat exchange chamber shell in an L-shaped or similar L-shaped structure. By adopting the structure that the heat exchange piece is bent in a heat exchange body, the heatexchange has simple struc