Nitrogen gas sealed circulating PVA powder processing method
A closed cycle, nitrogen technology, applied in grain processing, etc., can solve the problems of easy combustion, large temperature influence, dust pollution, etc., and achieve the effect of improving product quality, concentrating particle size distribution width, and controlling oxygen content
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[0023] Such as figure 1 Shown, a kind of nitrogen airtight circulation PVA pulverization method comprises the following steps:
[0024] (1) The PVA polymer or resin with a length of 2-5mm, a width of 1-3mm, a thickness of 0.3-1.2mm and a temperature of 28-45°C is continuously and evenly added to the crusher 2 after passing through the rotary air locker I1 to obtain PVA particles.
[0025] Among them: Crusher 2 is provided by Tianhua Chemical Machinery and Automation Research and Design Institute Co., Ltd., and its patent number is ZL201220651933.3.
[0026] (2) Input nitrogen gas to the crusher 2, so that the PVA particles are transported to the classifier 3 for classification, and the blades set on the top of the classifier 3 are rotated to rotate the PVA particles and nitrogen gas to obtain large particles of PVA and particles with a particle size of 20-40 mesh, Nitrogen gas for qualified PVA particles with a temperature <45°C; large particles of PVA fall into the lower cr...
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