A trapezoidal plate-fin heat exchanger with spurs for condensation of non-azeotropic multi-component mixtures

Abstract

The invention provides a trapezoidal plate fin type heat exchanger provided with stabs and used for condensation of a non-azeotropic multi-component mixture. The trapezoidal plate fin type heat exchanger comprises mutually parallel sheet plates; fins are arranged between the sheet plates and are trapezoidal fines; each trapezoidal fin comprises inclined parts inclining towards the corresponding sheet plate and horizontal parts; the inclined parts of each trapezoidal fin form the two legs of the trapezoid and are provided with the stabs in a punching mode, so that fluid on the two sides of the inclined parts is communicated through the holes formed in the inclined parts in the punching mode; the stabs extend outwards from the inclined parts in the flowing direction of the mixture. The novel trapezoidal plate fin type heat exchanger provided with the stabs and used for condensation of the non-azeotropic multi-component mixture achieves condensation of the non-azeotropic multi-component mixture so as to improve the heat exchange efficiency and reduce flowing resistance of the fluid.

Description

technical field [0001] The invention belongs to the field of heat exchangers, in particular to a heat exchanger used for condensation of mixed media with different boiling points, and belongs to the field of F28D heat exchangers. Background technique [0002] Condensation of mixed media with different boiling points is natural gas liquefaction (the main components are methane with a boiling point of -162°C, ethane with a boiling point of -88°C, propane with a boiling point of -42°C, etc.), air separation, mixed refrigerant refrigeration, petroleum or waste plastic cracking, biomass The main process of gas production and other industries. to reduce the process This kind of production process hopes to cool and precipitate components with different boiling points step by step according to the temperature level. The same refrigerant or product also exchanges heat in different temperature ranges. Therefore, the condensing equipment is required to facilitate the simultaneous hea...

AI Technical Summary

Problems solved by technology

Existing studies on condensation heat transfer of non-azeotropic mixed media focus more on the working conditions containing a non-condensable gas, and adopt measures such as low grooves and artificial roughness surfaces to reduce the average liquid film thickness when pure components condense Measures that have been proven to be effective are sometimes ineffective in the presence of noncondensable gases

, while the condensation heat transfer process and mechanism in the natural gas liquefaction and petroleum cracking industries are more complicated, the condensation process usually contains more than two kinds of non-condensable gases, and the heat transfer situation is more complicated

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