Plate fin heat exchanger and repair method for plate fin heat exchanger

Abstract

In a heat exchanger of the present invention, a release port for, in a case where a fluid flows into an internal space, releasing the fluid to an exterior is provided in a protection unit main body of each of protection units arranged on both outer sides of a heat exchange unit, and a protection unit fin plate of the protection unit has such strength that a coupling state between an outer surface of an outermost-layer partition plate and a bonding plate of the protection unit main body facing the outer surface is maintained even in a case where an inner pressure set as a design pressure for a part of the heat exchange unit constituting an outermost-layer flow passage adjacent to the protection unit is applied to the internal space of the protection unit main body of the protection unit.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a so-called plate fin heat exchanger in which a fin plate is installed, and a repair method for the same.[0003]2. Description of the Related Art[0004]Conventionally, there is a known plate fin heat exchanger (hereinafter, also simply referred to as the “heat exchanger”) described in Japanese Unexamined Patent Application Publication No. H7-167580. This heat exchanger is provided with a heat exchange unit in which a number of flow passages are aligned in laminated blocks called a core. Specifically, as shown in FIGS. 15 and 16, a heat exchange unit 100 is provided with a plurality of flat plate shape tube plates 102 arranged in parallel at intervals, a corrugated plate shape fin plate 104 arranged between the tube plates 102, and side bars 106 respectively arranged on both sides of the fin plate 104 so as to sandwich this fin plate 104 from both sides in the width direction. The side bars...

AI Technical Summary

Benefits of technology

The present invention aims to solve the problem of a partition wall between a heat exchange unit and a protection unit being damaged and fluid flowing out, restoring the heat exchanger to a state where no fluid flows out and it has sufficient pressure resistance performance for a short time. The invention proposes a repair method that involves sealing the release portion of the protection unit to prevent foreign substances and rainwater from entering, while also allowing the fluid to be released if the internal pressure of the protection unit increases. This repair method allows the heat exchanger to be repaired and used again for a short time. Additionally, the invention provides a configuration where an opening can be formed on the outermost partition wall to facilitate fluid distribution between the outermost-layer flow passage and the internal space of the protection unit.

Problems solved by technology

However, such repair requires a considerably long working time.

Thus, a stop period of the plant or the like where the heat exchanger is used is increased, so that a production loss becomes serious.

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