Impinging stream reaction kettle for preparing ultrafine powders

Abstract

The invention relates to a reaction kettle, and in particular to an impinging stream reaction kettle for preparing ultrafine powders. A heat exchange jacket is arranged outside a kettle body; a pressure gauge and a thermometer are arranged on a head cover; a gas outlet provided with a vent valve is formed in the head cover; a circulating discharge outlet is formed in the lower end of a kettle bottom; an overflow port is formed in the upper part of the kettle body; the circulating outlet in the lower end of the kettle bottom is connected with a lower nozzle; two groups of feed inlets are coaxially and oppositely arranged; three discharge holes are formed among the feed inlets; three center discharge holes are formed between two layers of feed inlets; horizontal discharge holes at an angle of 120 DEG relative to each other are formed between two layers of feed inlets; arc-shaped heat exchange baffles (10) are respectively arranged on the upper layer of the feed inlets and upper and lowerends of the feed inlets; and the spacing and the curvature of the baffles are adjustable; the arc-shaped heat exchanger baffles are divided into two groups: an upper group and a lower group; and flowguiding holes are formed in the lowest parts of the lower group of baffles. The impinging stream reaction kettle structurally comprises the heat exchange plates and the middle discharge holes to inhibit the formation condition of side reactions; recycle mixing can be carried out; the operation is convenient; and therefore, the impinging stream reaction kettle is particularly suitable for preparing a plurality of ultrafine powders.

Description

technical field [0001] The invention relates to a reactor, in particular to an impingement flow reactor for preparing superfine powder. Background technique [0002] Impinging flow technology has unique properties in interphase transfer, and has now become an important flow form in industrial applications. Many scholars at home and abroad have studied it, and it has been widely used in mixing, drying, absorption, combustion, crystallization, ultrafine powder Body preparation and other fields. After decades of development, the structural form of the impinging flow has been continuously improved. Especially since entering the 21st century, fluid mechanics experiments and CFD simulation methods have been changing with each passing day, which has greatly promoted the research and development of the impinging flow. Liquid continuous impinging streams (LIS) have properties that are extremely valuable for molecular-scale processes, such as efficient microscopic mixing, strong pres...

AI Technical Summary

Problems solved by technology

[0005] For example, in the Chinese patent CN 103611487 impinging flow reactor, the upper and lower chambers are too high, the impact between the impact surface and the chamber is not ideal, the entrainment of the material ejected from the nozzle and the surrounding fluid is weak, and the reaction conditions of the material are single, not ideal. Suitable for complex working conditions

[0006] The applicant once applied for a patent CN 106669582 A, a group of layered symmetrical baffle-type impingement flow mixing reactor, the actual operation proved that the internal structure of the reactor is too complicated, it is inconvenient to install and clean, and at the same time, the product and reactant require viscosity It cannot be too large, and at the same time, it is very difficult to determine the gap between the baffles, and there is no entrainment effect on the surrounding flow field

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