Reducing defibration electricity power on fiberboard production

Nowadays, Thermo mechanical defibration method is widely used by medium density fiberboard industry to get fiber from wood chips. In this method, chips are fiberized mechanically after the defeat of steam pretreatment. In spite of electricity is very high that used in the refiner in order to fiberized wood chips. It is consumed avarage 80-120 kw electricity in order to 1 ton dry wood fiber on fiberboard production plant. It reaches the total value of around 280 000 MW per year in Turkey, world is around 4.27 million MW. In recent times, there have been increased efforts to reduce this energy consumption. In particular, in addition to the steam pre-treatment, efforts have been made to make fiberizing easier by using different chemicals and various patents have been bought. Due to the global competitiveness, there is not enough data on industrial practices and the results of these. According to literary research, oxalic acid, hydrogen peroxide, sodium hydroxide etc. have been used in pre-treatment which have resulted in a degree of energy saving. Within this study, it is seen that in Turkey the chips of the most widely used Fagus orientalis and Pinus brutia are mixed in different ratios and using 3 different chemicals at rates of %0.1 - %0.2 - %0.3 (oxalic acid, hydrogen peroxide, sodium hydroxide) as a pre-treatment. As well as the effect these have on energy consumption, the morphology of the fibres and some physical and mechanical values of the fibreboard that is produced from them have been examined. The electrical energy used by refineries whilst defibrating has been measured; whilst the use of beech wood had no effect on the energy used for defribation, the use of pine wood chips in producing fibres resulted in a 13% decrease in electricity consumption. When assessing certain physical and mechanical properties of the fibreboard obtained in this way, statistically there is no negative impact.