A continuously conveying focused microwave reactor

Abstract

The invention belongs to the field of microwave energy application devices, and provides a continuous transmission focused microwave reactor, including a reaction device, a transmission device, a feeding device and a supporting device; it is characterized in that the feeding device includes a metal reflecting surface, a radiation horn, a Axial transmission line, waveguide coaxial conversion and microwave source, the metal reflection surface is set on the inner wall of the top surface of the metal cavity, the microwave source is connected to the radiation horn through the coaxial transmission line and the coaxial conversion of the waveguide, the radiation horn is fixed on the side wall of the metal cavity, and passes through the The radiation passes through the metal cavity and is inclined at a certain angle with the cavity wall, so that the focus of the metal reflection surface is located in the direction of the main lobe of the radiation horn. The invention adopts the mode of feeding the side end of the waveguide into the reflection focusing of the metal wall to realize the point of maximum field strength to irradiate the detection object, so as to improve the reaction efficiency, speed up the reaction speed, improve the uniformity of the reaction and save energy, and combine it with the continuous transmission production line , used in large-scale industrial production.

Description

technical background [0001] The invention belongs to the field of microwave energy application devices, in particular to a continuous transmission type focusing microwave reactor. Background technique [0002] In recent years, high-power microwave reactors have been widely used in heating, medical treatment, drying, coating, environmental protection, auxiliary extraction, etc., and achieved good results; however, reactors for solid material processing still face many problems. First of all, the application of microwave energy has entered the stage of large-scale industrialization, and the microwave reactor for single treatment is no longer suitable for the needs of industrialized continuous production; as in the patent document whose publication number is CN102946655A, it is necessary to manually remove the material every time for solid materials. Put it into the reactor and take it out manually after the reaction is completed, which is inefficient, cumbersome to operate, an...

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Problems solved by technology

[0002] In recent years, high-power microwave reactors have been widely used in heating, medical treatment, drying, coating, environmental protection, auxiliary extraction and other occasions, and achieved good results; however, reactors for solid material processing still face many problems

First of all, the application of microwave energy has entered the stage of large-scale industrialization, and the microwave reactor for single treatment is no longer suitable for the needs of industrialized continuous production; as in the patent document whose publication number is CN102946655A, it is necessary to manually remove the material every time for solid materials. Put it into the reactor, take it out manually after the reaction is completed, low efficiency, cumbersome operation, and poor safety

Secondly, with the deepening of research on the application of microwave energy, a variety of continuous transmission microwave reactors have been applied to various industrial productions, such as: rectangular waveguide reactors, ridge waveguide reactors, and flat waveguide reactors; They all belong to single-mode resonant microwave reactors, and to a certain extent, there are shortcomings such as small capacity, uneven field distribution, insufficient utilization of microwave energy, and slow processing speed; although circular waveguide reactors solve these problems to a certain extent , but it is still a single-mode resonant type with a small capacity and can only process a small number of small samples, which cannot meet the urgent needs of continuous processing of large-volume materials; for example, a pipeline-type industrial microwave heating is disclosed in the patent document with the publication number CN105338677A The microwave feeding device is evenly arranged outside the pipeline structure. By changing the structure of the microwave heating cavity, the mode of microwave industrial heating is fundamentally changed and the heating efficiency is improved. However, it still uses the waveguide feeding form for heating and requires multiple Microwave source is realized, the feeding structure is complicated, and the material filling operation is troublesome, and it is difficult to process larger materials

[0003] Aiming at the application requirements of large-scale microwave reactors, a non-resonant microwave reaction chamber is proposed, and the volume of the reaction chamber is greatly increased; the principle is to directly feed power into the large-scale reaction chamber through reasonable design, and generate various field modes, so that the inside of the chamber The field is concentrated in a specific area, and at the same time, conduits, conveyor belts, etc. are placed here to make the objects to be processed pass through the field concentration area at a continuous and uniform speed, so as to achieve the purpose of heating or increasing the chemical reaction rate; Poor performance, low reaction efficiency, high energy consumption, difficult to process solids, etc.

For example, the patent document with publication number CN104667849A adopts serpentine waveguide feeding, which can only continuously process gas and liquid samples. Devices are required to absorb unradiated energy, resulting in waste

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