Effect of Drying and Cooling Process on Particle Hardness.
In order to extend the storage time of wood chips products to ensure that the product quality within a certain period of time, the necessary drying and cooling of the wood particles. In the test for measuring the hardness of the particles, the hardness of the particles was found to be less than 5 minutes, 10 minutes and 15 minutes after the same product was separately cooled. The hardness of the particles having a low hardness was not significantly affected by the cooling time, Large particles with the cooling time lengthened and the particle hardness decreases. This may be due to the fact that as the moisture inside the particles is lost, the brittleness of the particles increases and affects the hardness of the particles. (The cooling time is 3 minutes) and the small air volume (throttle off to one third) slow cooling (cooling time 20 minutes), the comparison found that the former than the latter The hardness is reduced and the surface crack of the particles is increased.
In addition, it is worth mentioning that the large hard particles are broken, so that the large particles become small particles, can make the hardness of the particles significantly reduced. Through the large particles of broken, destroyed the internal structure of the particles, so that the pressure capacity of the particles decreased, the hardness is also reduced.
In the process of particle processing, the factors that affect the hardness of the particles far more than these, with more and more enthusiastic about the particle processing technology technology practitioners in-depth study, more and more methods of regulating the hardness of particles by people Master, I believe in the near future, we can process the most perfect biomass particles.