Pipeline type industrial microwave heating device

Abstract

The invention relates to the field of microwave industrial heating and particularly relates to a pipeline type industrial microwave heating device. The pipeline type industrial microwave heating device comprises microwave feed-in devices and a heating cavity, and is characterized in that the heating cavity is in a pipeline structure capable of being filled with heated solid materials, and mechanical equipment for pushing the heated solid materials into the pipeline structure, wherein the microwave feed-in devices are uniformly arranged at the exterior of the pipeline structure. According to the pipeline type industrial microwave heating device provided by the invention, the structure of the microwave heating cavity is changed so that the mode of the microwave industrial heating is radically changed and the heating efficiency is improved; meanwhile, the trumpet-shaped microwave feed-in devices which are distributed in an array shape are formed on the pipeline structure, so that the microwave radiation efficiency and the uniformity are greatly improved and the technical problem that the microwave industrial heating is not uniform is solved; by setting a perfect matching layer, the microwave heating efficiency is further improved, and impurities including dust, vapor and the like are prevented from entering a feed hole to damage the equipment.

Description

technical field [0001] The invention relates to the field of microwave industrial heating, in particular to a pipeline type industrial microwave heating device. Background technique [0002] With the rapid development of modern science and technology, microwave energy, as a new type of high-efficiency and clean energy, has been widely used in various fields such as industrial production and daily life. Microwave heating has the characteristics of "body heating". "Body heating" is a selective heating method that directly interacts with the substance to be heated. It replaces the traditional heating method in which the substance obtains temperature rise through heat conduction through the medium, saving heat in the medium. The time required for conduction reduces the energy consumption in the conduction medium, and has the characteristics of high efficiency and energy saving. However, while microwave heating technology continues to develop, there are also many problems. [0...

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Problems solved by technology

[0003] In large-scale industrial production, there are problems of uneven heating and low efficiency when using traditional "tunnel" microwave heating devices to heat solid materials

When microwave irradiates a large solid material, its skin depth is much smaller than the size of the material, causing the energy of the microwave to only concentrate on the surface area of ​​the material, resulting in uneven heating; at the same time, because the conveyor belt must keep moving, the material only It can fill part of the tunnel space, causing the problem of low heating efficiency; in industrial applications, it is generally required that the equipment can work under complex conditions such as high temperature, high pressure, and corrosion resistance, which increases the requirements for microwave reactors and microwave heating chambers

[0004] Secondly, in the traditional "tunnel-type" microwave heating device, dust, water vapor and other impurities tend to diffuse upward during the heating process, and enter the microwave feeder to damage the equipment, especially some materials that will volatilize corrosive gases during the heating process, such as the microwave of ore. Desulfurization, etc., is not conducive to the use of this equipment for industrial production

[0005] Because the microwave wavelength is relatively short, and there is almost no natural convection inside the solid material, and when the microwave penetrates into the solid material, its skin depth is much smaller than the size of the material, causing the energy of the microwave to only concentrate on the surface area of ​​the material. These factors can cause uneven heating

[0006] The problems of non-uniform heating and low efficiency caused by the above factors limit the application of microwave in industrial production

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