Plate-fin heat exchanger of brazed composite clamping pipe

Abstract

The invention discloses a plate-fin heat exchanger of a brazed composite clamping pipe, comprising a plate bundle body (1). The plate bundle body (1) is formed by alternately stacking two or more thantwo layers of channel units. The plate-fin heat exchanger is characterized in that at least one of the two or more than two layers of channel units is a pipe layer channel unit (11); the pipe layer channel unit (11) comprises a first clamping plate (111), a second clamping plate (112), and a plurality of straight pipes (113) arranged between the first clamping plate (111) and the second clampingplate (112); grooves corresponding to the straight pipes (113) are formed in the first clamping plate (111) and the second clamping plate (112); the straight pipes (113) are contained in the grooves of the first clamping plate (111) and the second clamping plate (112); and the first clamping plate (111), the second clamping plate (112) and the straight pipe (113) of the pipe layer channel unit (11) form a whole after integral brazing forming.

Description

technical field [0001] The invention relates to a plate-fin heat exchanger, in particular to a plate-fin heat exchanger with brazed composite pinched tubes. Background technique [0002] Plate-fin heat exchanger is a high-efficiency heat exchanger with fins as heat transfer elements. It has the characteristics of high heat transfer efficiency, compact structure, expandable heat exchange channels, large adaptability, and light weight. Therefore, , It is widely used in gas-gas, gas-liquid and liquid-liquid two or more heat exchange equipment, and is usually used in the field of air separation equipment at present. [0003] For the existing technology, please refer to the technical standard "NB / T 47006-2019 Aluminum Plate-fin Heat Exchanger". The standard plate-fin heat exchanger is composed of plate bundle body, head, connecting pipe, support and other accessories. The plate bundle body is composed of two or more layer channel units alternately stacked and integrally brazed. ...

AI Technical Summary

Problems solved by technology

[0004] However, the existing plate-fin heat exchanger, because its channel is made of aluminum fins, the strength of the aluminum material is obviously reduced when the temperature is above 60°C, and it is not resistant to corrosion, so the existing plate-fin heat exchanger is not resistant high pressure, not resistant to high temperature, not resistant to corrosion, and easy to block, can withstand up to 15Mpa, and its use is limited

Therefore, in the case of high pressure, high temperature or corrosive fluids on the market, only coil heat exchangers with high cost and much poorer heat transfer efficiency can be used.

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