Experimental research on biomass cutting process

Abstract

This paper contains the results of the biomass cutting process in which wheat straw was used. Tests were made on the prototype test stand which made it possible to control the parameters of the cutting process and based on that define its energy consumption. During the research the following parameters were measured: rotational speed of electric motor, which drives the rotor with a set of cutting knives, electric current supply and torque on the shaft. Tests were made for the variable moisture content of the biomass and with knives with three different back-rake angles 5°, 15° and 30°. Using these measured parameters it was possible to calculate the power and the cutting force necessary to disintegrate biomass. The main goal was to find out if there is any influence of moisture content and the back-rake angle of the cutting knife on the dynamic parameters of the process - power and cutting force. The presented results can be very useful in a design process for a working assembly of biomass disintegrating machines which are directed to the energetic efficiency.

The influence of the piercing punch profile on the stress distribution on its cutting edge

“…Technically, the punching process with a closed contour tool is a combination of the compression of the scrap and shearing of the material. Because of that it is possible to find some similar correlations between the geometrical parameters of the tools and the necessary force or torque in cutting [9] and agglomeration [10][11][12][13][14]. Since polymer composite belts may have various structures, the main resemblance can be found in natural polymers [9][10][11]15] and unclassical materials [12][13][14].…”

Testing of a force sensor used to measure the briquetting process parameters of lignocellulosic materials

“…Table 1. The balance of the total production and utilization of straw in the years 2010-2030 [ Compaction of materials enables the change of their mechanical and usable properties as well as transport and storage conditions [8][9][10][11][12][13][14][15]. The manufacturing of solid fuels calls for the utilization of proper compaction technique.…”

“…Pelletization utilizing roller technology calls for a finer breakdown of straw material. Whereas worm/screw-based compaction allows to compact cut straw with length from several to several dozen millimeters [8][9][10][11][12][13][14][15]. Fig.…”

Functional and construction indicator for the briquetting process of lignocellulosic materials

“…Powders and shredded materials need to be compacted to give them the appropriate geometrical form and mechanical properties [9][10][11][12][13][14][15]. The manufacturing of renewable solid fuel from broken down lignocellulosic materials requires proper preconditioning of the material, breaking it down, drying and mixing.…”