Abstract
In order to generalize the possibilities of using MW radiation in industrial processes, the given paper considers and analyzes various methods of wood drying. Technological and economic advantages of wood drying in an ultra-high frequency electromagnetic field are well justified. Wood drying in the ultra-high frequency range is considered as the most optimal in contrast to traditional methods. This method is based on the penetration of electromagnetic energy into the material and converting it into heat. The paper reveals the possibility of more effective use of MW radiation. It proposes a method for drying wood and large-sized lumber basing on a single-wire transmission line of electromagnetic energy of the surface wave. The paper also describes the advantages of the proposed method: the use of a single wire covered with a thin layer of dielectric material, the use of a vibratory system for surface wave excitation, and the use of a flat reflector. Special attention is paid to the contact area of the wire with a flat reflector since the perfection of this contact largely determines the efficiency of surface wave excitation. The conducted research estimated the influence of the parameters of the vibratory surface wave excitation system in a single waveguide on the efficiency of its excitation. The proposed vibratory excitation device allows quite a simple step-by-step adjustment of the thermal power in the irradiated object. The design of the dissipation load for surface wave lines has been successfully tested during the laboratory works where certain ways of unclaimed electromagnetic energy utilization were suggested. Following the results of the conducted research, we proposed a physical model of a system for microwave drying of wood and large-sized lumber
Highlights
Modern wood drying plants are mainly based on the use of convective and aerodynamic drying chambers
The aim of the study is the development of a system for microwave drying of wood and large-sized lumber using a single-wire transmission line and the effects associated with the transformation and re-radiation of surface waves
The single-wire line will have a small attenuation when the surface wave propagates, and the main part of the electromagnetic energy will be concentrated in a small volume around the wire [15]
Summary
Modern wood drying plants are mainly based on the use of convective and aerodynamic drying chambers. Infrared emitters consisting of an energy source and a reflector provide deep or surface heating of the irradiated body or, if necessary, local drying of the object This type of wood drying is not widely used due to the low degree of penetration of infrared waves into the object [2]. A dryer includes a working chamber containing a magnetron unit and a system for distributing the energy of the electromagnetic field in the microwave range along the length. This applies to the industry where emergency, economical drying of medium-sized wood is required. The lack of required information leads to the need for additional experimental studies
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: Eastern-European Journal of Enterprise Technologies
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.