Analysis of waveguide with special resonant window which can reduce the energy consumption of waste rubber pyrolysis

Abstract

Microwave pyrolysis is a new technology for waste rubber treatment. In this paper, the microwave energy transfer characteristic working at a frequency of 2.45 GHz in different types of rectangular waveguides are investigated with HFSS simulation software. The results show that although the quartz sealing plate of the rectangular waveguide can prevent the combustible gas generated by waste rubber pyrolysis from entering the microwave generator, it also causes some microwave reflection at the same time, which will reduce the microwave energy transmission efficiency, shorten the service life of the microwave generator. While the resonant window of the rectangular waveguide, that is, a rectangular window with a certain size in the centre of the copper sealing plate, and with a quartz plate embedded in the window, can avoid such microwave reflection, not only enhance the sealing performance, but also improve the waste rubber pyrolysis efficiency and reduce the pyrolysis energy consumption.