Anti-inner leakage plate heat exchanger

Abstract

The invention relates to the technical field of plate heat exchangers, in particular to an anti-inner leakage plate heat exchanger. A medium entering from a hot flow inlet and a medium entering from acold flow inlet flow past in sequence on every two adjacent first plates; due to a block of a first sealing component, the media separately outflow from a hot flow outlet and a cold flow outlet; heattransfer is performed on the cold and hot media on every two adjacent first plates through heat transfer of the first plates so as to complete heat exchange; after surfaces of the first plates generate fine cracks due to the fact that the first plates are suffered from corrosion, the media leak from the cracks into foam metal layers, and the leaked media are mixed into media in heat exchange inlets and media in heat exchange outlets, that is, after the first plates fracture, a cross-flow phenomenon cannot occur on the two media exchanging heat mutually, and therefore, the explosion phenomenoncaused by the fact that the two media exchanging the heat are mixed is avoided; and meanwhile, heat exchange is performed through two layers of the first plates and media flowing in the heat exchangeinlet and the heat exchange outlet, further improving heat exchange performance. The condition of the adverse action can be easily caused after inner leakage occurs on a traditional plate heat exchanger is solved.

Description

technical field [0001] The invention relates to the technical field of plate heat exchangers, in particular to an internal leakage-proof plate heat exchanger. Background technique [0002] The plate heat exchanger has a history of more than 100 years since its development, and the plate heat exchanger itself has the characteristics of high efficiency and convenient maintenance. With the deepening of people's understanding of heat exchangers, its application fields have been continuously expanded. The products have been used in more than ten industries such as petrochemical, metallurgy, electric power, light industry, food, medicine, and papermaking, and have been widely recognized by people. [0003] However, the existing plate heat exchangers are prone to internal leakage after long-term use, which will affect the heat transfer performance. In severe cases, it will cause adverse reactions such as corrosion, explosion or severe toxicity. The specific reasons for internal lea...

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Problems solved by technology

[0009] The technical problem to be solved by the present invention is: In order to solve the problem that the existing plate heat exchanger is prone to internal leakage and cause adverse reactions, the present invention provides a plate heat exchanger with internal leakage prevention. When the first plate is subjected to After fine cracks are formed on the corroded surface, the medium leaks from the cracks into the metal foam layer, and the leaked medium is mixed into the medium in the heat exchange inlet and heat exchange outlet, that is, when the first plate breaks, the two heat exchange There will be no cross-flow of the medium, avoiding the explosion caused by the mixing of the two media for heat exchange. At the same time, the heat exchange is carried out through the double-layer two first plates and the medium flowing in the three inlets and the heat exchange outlet. Further improved heat transfer performance

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