Universal pulverizer motor in the grinding groove bottom, such as the crushed sample water or oil content is too high, the liquid along the axis into the motor, easy burning motor, universal grinder grinding water or liquid is a large quantity of sample.
Viscous, oily materials has been crushed difficulties. Because the shattered as fineness and the rise of temperature, precipitation material contained liquid composition continuously, cause screen plugging, discharge not free, can only stop treatment.
According to this situation, we have made some changes in the internal universal grinder equipment, in the grinding chamber with a blade, the blade rotation, which increased the air volume, and lower temperature, the yield increase. Secondly, the aggregate bag materials have been adjusted, using big meshes, breathable aggregate bag made of good material, can make the ventilation rate enhancement, quickly exhaust heat, productivity has been improved.
Improved through the above technologies, the universal mill application in this field has been widely promoted.
Boiling drier in the distribution plate has two functions, one is the supporting material layer two is negative, uniform gas distribution. The size, shape, distribution, distribution board opening hole rate and distribution of fluid is very important. Gas distribution is not uniform, will make the bed in a "Circulation", which tend to be extremely easy to make some parts of the bed layer in a "channeling", while the remaining part is the death bed, then most of the gas along the bed in some channels in the "form of short channel" through the bed go, just solid contact much worse, it should be to avoid. Design of the distribution plate good, should not uniformity appears to suppress the bed, namely when the bed layer in certain parts of the pressure drop, flow velocity increased, generated by increased distribution board should be able to prevent the flow resistance, thus suppressing deterioration of fluidization.
At present the majority of boiling dryer using the air distribution plate form is single, the perforated plate or mat shape net vertical, material appear very easily flow uneven or the dead angle problem in fluid process, can not ensure the uniformity of particles in drug, while a single hole form cannot meet the requirements of different production process drugs. On the other hand, in order to reduce the leakage loss of drugs, the current widespread use of multilayer network structure, the airflow distribution board and the bed body with a bolt fixing, inconvenient disassembly, not easy to clean and residual cross-contamination problem. Recommendations: the use of computer fluid dynamics model of heat and mass transfer, model, distance, the hole in the air distribution plate design aperture, porosity parameters such as aerodynamics, Thermodynamics Simulation and verification, to meet the requirements of the production process of different materials. In the installation, connection is made detachable, in order to ensure quick and thorough, complete cleaning. |
Some of the universal grinder and boiling dryer equipment improved technology