HEAT EXCHANGER AND SUPERHEATED STEAM GENERATING DEVICE USING THE SAME

摘要

A heat exchanger, comprising a heat exchange flow passage (21) having a plurality of annular flow passages (24) disposed parallel with each other and allowed to communicate with each other in the circumferential direction, a plurality of inflow ports and outflow ports formed in the annular flow passages (24) so that the positions of the inflow ports are displaced from those of the outflow ports in the annular flow passages (24), and a plurality of communication pipes (25) communicating the inflow ports with the outflow ports formed in the different annular flow passages (24) and (24) and projected into the annular flow passages (24). A fluidsupply pipe (22) and a fluid discharge pipe (23) are allowed to communicate with the heat exchange flow passage (21) to form the heat exchanger.