A three-media braided wire mesh material heat exchanger and its manufacturing method

Abstract

A three-medium braided wire mesh material heat exchanger and a manufacturing method thereof belong to the technical field of heat exchange equipment. It is characterized in that: a multi-piece metal mesh heat exchange unit is arranged between the two pressing plates (1); the metal mesh heat exchange unit includes a heat exchange plate (7) and seals on both sides of the heat exchange plate (7). The plate (6) and the metal mesh core (11), the heat exchange cavity (9) of the metal mesh heat exchange unit is provided with three medium flow channels, one medium flow channel communicates with the heat exchange cavity (9), The other two medium flow channels communicate with the heat exchange cavities (9) of the two adjacent metal mesh heat exchange units along the flow direction of the medium respectively. The metal mesh heat exchange unit of the three-media braided wire mesh material heat exchanger of the present invention exchanges heat through the metal mesh core, and the metal mesh heat exchange unit forms eddy currents for fluid disturbance, which greatly improves the heat exchange efficiency and has a strong bearing capacity ; The production method has high precision, and the cryogenic treatment and anti-quenching treatment greatly improve the service life of the metal mesh.

Description

technical field [0001] A three-medium braided wire mesh material heat exchanger and a manufacturing method thereof belong to the technical field of heat exchange equipment. Background technique [0002] Heat exchanger is an important energy exchange equipment in industrial production, and occupies an important position in petrochemical, nuclear energy, aerospace and other fields. At present, shell and tube heat exchangers are mainly used, which are large in size and low in heat exchange efficiency, which do not meet the requirements of scientific development. Many people have put forward plans for the optimal design method of heat exchangers, but due to the ambiguity of the optimal design goals and the diversity of heat exchanger types, the optimal design of heat exchangers is still not perfect. With the development of science and technology and the needs of practical technology, the application of three-medium composite heat exchanger has been paid more and more attention....

AI Technical Summary

Problems solved by technology

However, the widely used plate heat exchangers still have several defects in actual use: the heat exchange plates are stacked by metal sheets with a certain corrugated shape, which have low rigidity and poor bearing capacity; Plate heat exchangers below 2.5MPa are sealed by gaskets, and the sealing periphery is long, and the support of the two seals of the corner holes is poor, and the gaskets cannot get enough compression force, which is easy to cause leakage; in addition The plate heat exchanger is limited by the heat exchange area, so its heat exchange efficiency is not high

[0005] Chinese invention patent ZL201110309135.2 discloses a lattice material heat exchanger. Compared with conventional plate heat exchangers, the heat exchanger has improved carrying capacity and heat transfer efficiency, but the manufacturing process is more complicated and requires multiple passes. The final shape can only be formed by the welding process. Welding is required between the upper and lower panels and the diffuser, between the upper and lower panels and the seal, and between the diffuser and the seal, which may cause leakage problems and the sealing performance cannot be effectively guaranteed; Secondly, when the metal mesh core of the lattice material is stamped and formed, especially for most aviation materials, springback is prone to occur, which makes the size of the metal mesh core change or there is a large residual stress inside the metal mesh core. It meets the requirements of use, and it is difficult to apply in fields that require high dimensional accuracy

In summary, the lattice material heat exchanger has certain limitations in engineering applications

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