A kind of countercurrent jet cold and hot fluid mixer under the action of external field

Abstract

A countercurrent injection hot and cold fluid mixer under the action of an external field, including vertically arranged hot fluid pipelines and cold fluid pipelines, the inlet of the hot fluid pipeline is at the top, the outlet is at the bottom, and the inlet of the cold fluid pipeline is at the bottom. The outlet is at the top, and the thermal fluid pipeline is surrounded by a mixing end pipe and a mixing middle pipe to form an annular flow channel, wherein the mixing middle pipe is located below the mixing end pipe, and the mixing end pipe is connected with a mixing outlet pipe, and the thermal fluid pipeline The outlet of the cold fluid pipeline and the outlet of the cold fluid pipeline converge at the initial mixing pipe, and the initial mixing pipe communicates with the final mixing pipe and the middle mixing pipe. The mixing outlet pipe is connected to the reactor. An ultrasonic generator can be connected to the outside of the initial mixing tube to apply ultrasonic external field to assist mixing. The present invention can effectively avoid situations such as uneven mixing of the mixer resulting in uneven particle size of the product and large particle size of the product due to insufficient mixing.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a countercurrent jet cold and hot fluid mixer under the action of an external field. Background technique [0002] Nanotechnology has an important strategic position in the industrial revolution of the 21st century and is the most important and most promising cutting-edge technology in the 21st century. Nanomaterials have unique electrical, thermal, magnetic, optical and mechanical properties. Their application in electronic information, high-end manufacturing, new energy, green chemical industry, life medicine, military technology and other fields has triggered revolutionary technological breakthroughs in their fields. , has an extremely bright application prospect. The preparation of nanomaterials is the fundamental basis for the wide application of nanotechnology. Only by mastering the preparation technology of high-end nanomaterials can we seize the com...

AI Technical Summary

Problems solved by technology

[0012] 1. During the mixing process of inorganic salt solution and supercritical water, because the flow rates of the two do not match, supercritical water will be mixed into the pipeline of inorganic salt solution, causing local temperature rise, and even causing high-concentration inorganic salt to remain in the pipeline. Crystallization occurs in the pipeline that does not enter the mixer, so it is very easy to cause pipeline blockage

[0013] 2. Since both the inorganic salt solution and the supercritical water are in a large flow section, they are seriously disturbed after the collision, forming a temperature field and a concentration field with very uneven distribution of temperature and velocity, thus causing the temperature in some areas to reach The reaction temperature has been exceeded, and some areas have not reached it, resulting in unstable particle size and failure to produce good quality products

[0014] 3. There is no enhanced mixing device in the mixed pipeline, and the supercritical water and materials enter the reactor before being fully mixed, resulting in insufficient mixing during the entire mixing and reaction process, making it difficult to achieve rapid temperature rise, Uniform mixing, unable to produce high-quality products with low particle size

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