A SHORT-CIRCUIT-PROOF HEAT-EXCHANGER WITH HELICAL BAFFLES

摘要

A short-circuit-proof heat-exchanger with helical baffles, includes a shell (1), helical baffles (4) provided inside the shell (1) and heat-exchanging tubes (5) throughout the helical baffles (4). Each helical baffle (4) has a 360°/4 quadrant-shaped projection. Both straight sides of the helical baffles (4) are widened and overlapped one by one. The heat-exchanging tubes (5) penetrate the widened and overlapped sections. The heat-exchanger further includes a plurality of tie rods (2), one of which is located at the central axis of the shell (1) and penetrates the widened and overlapped sections of the helical baffles (4), the othersof which penetrate the end portions of the central lines of the widened and overlapped sections' projections. The tie rods (2) are fixed on the inner surface of a tube sheet (7) on one end, and are fixed on the corresponding distal helical baffle (4) on the other end. Spacing tubes (3) are divided into several segments and are provided on the tie rods (2).