Continuous transmission type quasi non-diffracted wave microwave reactor

Abstract

The invention belongs to the field of microwave energy application devices, and provides a continuous transmission type quasi non-diffracted wave microwave reactor. The continuous transmission type quasi non-diffracted wave microwave reactor comprises a reaction device, a transmission device, a feeder device and a supporting device; the feeder device comprises a radiator, feed waveguides, a power distribution and phase shifting device, a coaxial transmission line and a microwave source; the microwave source is connected with the input end of the power distribution and phase shifting device through the coaxial transmission line, the output end of the power distribution and phase shifting device is connected with a plurality of the feed waveguides, the feed waveguides penetrate through a metal cavity to be connected with the radiator, the radiator is located right at the lower middle part of the back of the metal cavity, and rectangular radiation mouths which are docked with the feed waveguides and have the same sizes with the feed waveguides are formed in the radiator. The continuous transmission type quasi non-diffracted wave microwave reactor disclosed by the invention adopts a method of using multiple feed ports to feed to generate non-diffracted waves to irradiate reactants, so that the reaction efficiency is improved, the reaction speed is accelerated, the reaction uniformity is enhanced and the energy is saved, and in addition, the continuous transmission type quasi non-diffracted wave microwave reactor is combined with a continuous transmission type production line to be applied to the 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 quasi non-diffraction wave 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, cumbe...

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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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