Processed cedar waste electrophysical properties

The purpose of research is to study the energy properties of processed waste from the cedar industry using the example of crushed pine nut shells, which are currently widely used both in the food industry and in agriculture. Tasks: to determine the dependence of electrophysical parameters and energy properties of mechanically activated samples of cedar shells with different degrees of fractions in a wide range of electric field frequencies. Experimental studies have been carried out for samples with different degrees of grinding from 1000 to 50 μm with a variation in the frequency of external electrical action from 50 Hz to 1 kHz. Using an E7-20 voltage immitance meter and a specially designed measuring cell in the form of a flat capacitor, data were obtained on the electrical capacitance and conductivity of the samples under study, which were used to calculate the permittivity, which directly affects the energy properties of the substance. The dependence of the dielectric characteristics (electric capacitance, real part of the dielectric permittivity and dielectric loss tangent) on the degree of dispersion of the studied samples of crushed cedar shells has been obtained and analyzed. The fact of a decrease in the dielectric parameters of the crushed cedar shell for samples with a particle size of less than 250 μm and a smoothing of variations with increasing frequency is noted. A conclusion is made about the influence of the degree of grinding on the dielectric characteristics and energy properties of the studied disperse medium. The optimal size of particle size reduction (about 250 microns) is recommended for the processing of cedar shells in order to save energy resources and increase the energy value of the product.