SPIRAL TYPE HEAT EXCHANGER

摘要

This aims to provide a spiral heat exchanger having at least two band-shaped heat transfer plates wound spirally. Stud pins are continuously disposed in a shelf shape through a predetermined clearance at a predetermined space from the individual open end edges of the two band-shaped heat transfer plates. A string-shaped gasket is mounted and spirally wound on the stud pins, and is fastened by a cover so that the spiral heat exchanger can be easily manufactured. A string-shaped cleaning member extending along a passage in the longitudinal direction of the band-shaped heat transfer plates is operated to switch the entrance and exit of a fluid so that the string-shaped cleaning member can be freely slid like a long wiper in the axial direction of the spiral, thereby to clean the heat transfer faces of the confronting the band-shaped heat transfer plates. The two band-shaped heat transfer plates are joined to a semicylindrical core cylinder, of which a central core cylinder can be assembled and disassembled, to constitute mutually independent unit members, so that the band-shaped heat transfer plates can be easily manufactured and cleaned. An inverted cup-shaped end plate and reinforcing ribs can be integrally used in the cover or a closed flange, so that not only the closed flange but also the spiral heat exchanger can be reduced in weight.