I. Project Description:

　　PVB, Chinese name polyvinyl butyral, PVB resin is a polymer material, translucent film, non-toxic, odorless, non-corrosive, non-flammable, with good light transmission, insulation, weathering, abrasion, water, oil, aging resistance, inorganic and organic glass has a special bonding and light transmission properties. It can be used as laminated material for safety glass and other transparent materials.

II. Overview of PVB special rotary flash dryer:

　　According to the material characteristics of PVB, rotary flash dryer to dry PVB, the whole set of equipment using steam heating, drying capacity of 800Kg / h, can be the initial moisture of 35% of the wet material drying to less than 1.5%, because the material is a heat-sensitive materials, so the dryer's host jacket water cooling, because the material to withstand lower temperatures, then the lower temperature of the inlet air, so the main tower to increase the height of a section, to Extend the drying time of the material, the whole system is made of stainless steel at the material contact place, and the rest is made of carbon steel. Tail gas treatment system mainly consists of cyclone separator, cloth bag duster and induced draft fan, through the cyclone separator and cloth bag duster to deal with the dust in the tail gas.

III. Principle of rotary flash vaporization dryer for PVB:

　　PVB dryer materials from the spiral feeder into the dryer, in the high-speed rotating stirrer under the strong effect of the material by the impact, friction and shear effect is dispersed, lumpy materials are quickly crushed, and the hot air is fully in contact with the touch, heat, drying. After dehydration of dry powder with the hot air rising, grading ring will be large particles retained, small particles from the center of the ring out of the dryer, by the cyclone separator recovery, not dry or large pieces of material by the role of centrifugal force thrown to the wall of the wall, and then fall to the bottom of the crushed and dried. As the gas-solid two-phase rotating flow, solid-phase inertia is greater than the gas phase, the relative velocity between the two phases of solid gas is greater, strengthening the heat transfer between the two phases of the nature of the machine, so the production of high intensity.

IV, PVB special rotary flash vaporization dryer features

1, In the low part of the high temperature zone of the dryer, heat-sensitive materials are not in direct contact with the hot surface, and is equipped with a special device to solve the problem of coking and discoloration of heat-sensitive materials.

2、Because of the high gas velocity inside the drying chamber, the materials have short residence time, so as to achieve high efficiency, fast, small equipment, large output.

3、The upper part of the drying chamber is equipped with pottery analyzing ring and cyclone piece to control the particle size and temperature of the exported materials to meet the requirements of final water particle size of different materials.

4、Because of the lower temperature of the material, the inlet air temperature is lower, so the main tower to increase the height of a section, in order to extend the drying time of the material.