Highly effective complete aluminum alloy heat exchanger

Abstract

The invention relates to the technical field of heat exchangers, in particular to a high-efficient all aluminum alloy heat exchanger which comprises a housing, and a main fluid inlet pipe, a main fluid outlet pipe, a heat exchanging medium inlet pipe and a heat exchanging medium outlet pipe, which are connected externally with the housing. At least one all aluminum alloy heat exchanging sheet which is formed by the extrusion process is arranged in the housing; each heat exchanging sheet is provided with a heat exchanging fin and a nick; the middle of each heat exchanging sheet is provided with a seamless millipore passage in the length direction; the seamless millipore passage and the main fluid inlet pipe are communicated with the main fluid outlet pipe so as to form a main fluid passage; and clearances between the nicks of the heat exchanging sheets and the heat exchanging fins, clearances between adjacent heat exchanging sheets, the heat exchanging medium inlet pipe and the heat exchanging medium outlet pipe together form a heat exchanging medium passage. The invention has the advantages of good heat transfer performance, high voltage resistance, low temperature resistance, low cost and stable operation, can be used in oil refining engineering, chemical engineering, low temperature engineering, liquefaction of natural gas, liquid vaporization, gas separation and other industrial fields, and can be used for super-low temperature gas liquefaction or liquid vaporization.

Description

Technical field: [0001] The invention relates to the technical field of heat exchangers, in particular to a high-efficiency all-aluminum alloy heat exchanger. Background technique: [0002] At present, heat exchangers widely used in petroleum, chemical industry, metallurgy and other fields mainly include shell-and-tube heat exchangers, plate heat exchangers, spiral plate heat exchangers, vibrating coil heat exchangers, and plate-fin heat exchangers. [0003] The plate heat exchanger is a high-efficiency energy-saving heat exchanger, which has the advantages of small size, light weight, large heat exchange area per unit volume, low resistance and simultaneous heat exchange of multiple streams. The plate heat exchanger is mainly composed of a group of rectangular thin metal plates arranged in parallel, and the plates are clamped and assembled on the bracket with a frame; the edges of two adjacent plates are lined with gaskets (rubber or compressed asbestos, etc.) In order to ...

AI Technical Summary

Problems solved by technology

The main disadvantages of the plate heat exchanger are: it is not allowed to operate high pressure, the pressure exceeds 10MPa, and it is easy to leak; the operating temperature cannot be too high, due to the limitation of the heat resistance of the gasket, such as the synthetic rubber gasket does not exceed 130 ℃, and the compressed asbestos The gasket should also be lower than 250°C, and for low temperatures, it should not be lower than -50°C; the fluid handling capacity is not large, because the manufacturing process is strictly limited by pressure, the plate spacing is small, the flow channel cross-section is small, and the flow rate cannot be too large

[0009] The disadvantages of the plate-fin heat exchanger are: the flow channel is small, easy to block, and difficult to clean, so special materials are required to clean it; its structure is more complicated, and it is difficult to repair if internal leakage occurs, and the fluid resistance is also large; in addition The use of brazing process makes the plate-fin heat exchanger also unable to withstand the pressure above 10MPa

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