Impinging stream micro-channel reactor and application

Abstract

The invention discloses an impinging stream micro-channel reactor. At least two micro-channels which are coaxial or impinge oppositely with a certain angle and have the equivalent hydraulic diameter of 0.1 to 2 millimeters are engraved on a flat material, and an impinging area with the width (or the opposite impinging distance) of 0.5 to 10 millimeters is formed between the opposite impinging channels. The micro-channels can be distributed in a parallel array and communicated to two inlets with step branch configurations. A plurality of chips can be assembled separately or stacked in order and pressed to form the impinging stream micro-channel reactor with four feeding holes at most. The impinging stream micro-channel reactor of the invention is applicable to an instantaneously finished reaction process or a reactive precipitation process such as gas-liquid and liquid-liquid quick reaction for generating liquid or solid (superfine powder or nano material and the like). The micro-channel form realizes high reaction evenness in the impinging area, and solves the problem that the impinging stream is difficultly provided with a multi-level system (mutual interference among a pluralityof pairs of impinging streams) in the past.

Description

technical field [0001] The microchannel reactor of the present invention is specifically an impingement flow microchannel reactor, which is suitable for instantaneously completed reaction process or reaction precipitation process. Background technique [0002] The concept of Impinging Streams (abbreviated as IS) was first proposed by Elperin. Impinging flow is one of the most effective methods for enhancing interphase transfer, especially in the chemical process of external diffusion control. It is most likely to be applied in the fields of preparation of ultrafine powder, fuel combustion, drying, and crushing and grinding solid particles. Reactors developed using the principle of impinging flow are represented by Wu Yuan's (CN1463789A, CN2455353Y, CN2696710Y, CN200948420Y) submerged cycle impinging flow reactor (SCISR) and gas-liquid impinging flow reactor in China, and Brauer Heinz's "static jet flow reactor" abroad. Mixer" (DE2900083), MahajanA J and Kinvan D J. (AICHE J...

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Problems solved by technology

[0003] In order to solve the problem of uneven flow field distribution in the impingement zone in the existing impinging flow reactor, the present invention provides a multi-stage reactor in which several pairs of impinging flows are arranged in an array. Good mixing, the form of microchannel array achieves high uniformity of reaction, which solves the problem that it was difficult to arrange multi-level systems (mutual interference between multiple pairs of impinging streams) in impinging flow reactors; while the process fluid medium (two streams) is the most Only arrange four feeding ports

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