Putty powder cellulose physical properties:

The appearance of white or yellowish flocculent fiber powder or white powder is not, odorless and tasteless, non-toxic; soluble in cold water or hot water to form a gel, the solution is neutral or slightly alkaline, insoluble in ethanol, ether, Isopropanol, acetone and other organic solvents, soluble in 60% ethanol or acetone solution. Hygroscopicity, light and heat stability, viscosity decreases with increasing temperature, the solution is stable at pH 2-10, PH is lower than 2, solid precipitation, PH value higher than 10 viscosity decreases. Color temperature 227 ℃, carbonization temperature 252 ℃, 2% aqueous solution surface tension 71mn / n.

First, the vacuum rake dryer working principle
Vacuum rake dryer mainly by the shell, rotating shaft and rake teeth. Unlike paddle dryers, the rotary rake and rake teeth of a vacuum rake dryer are not used as a heating surface, they serve only as a means of agitating the material and renewing the surface. Rake dryer vacuum operation, the first wet material added to the dryer, the jacket into the heating medium (usually water vapor or hot water can also be used thermal oil), and then start the vacuum pump to achieve the required degree of vacuum , Start the mixing device, the use of rake teeth positive and negative, so that the material in the drying process to the middle and ends of the continuous push, at the same time, between the rake teeth can also be placed according to user requirements 4 stainless steel rod (seamless steel pipe) , It constantly up and down in the process of shaft rotation, vibrating the material bonded to the wall and crushing the agglomerated material. Through these measures, we can ensure the timely update of the heat transfer surface, thus accelerating the rate of heat and mass transfer. Material drying to the required moisture, stop heating, turn off the vacuum system, remove the dry material, complete a cycle of operation. This dryer is suitable for the drying of pastes, pastes, granules and fibrous materials, especially for heat-sensitive materials and drying operations requiring the recovery of organic vapors. Vacuum rake dryers have many advantages. Vacuum rake dryer rake tooth left and right to the two basic forms, regardless of the left or the right has a special type and paddle type two, installation, the difference between adjacent rake teeth 90 degrees, the axis Shaped rake teeth installed at both ends, the rest of the installation blade type rake teeth. Axis rotation, the material in the role of the mixing shaft, the first move to both sides, and then move to the middle, so you can ensure that the entire drying process, the material has been in uniform mixing state.

Vacuum rake dryer commonly used drying medium is generally 0.1-0.3Mpa steam, HTF or hot water, the degree of vacuum within the dryer 50-90kPa, the material filling rate of 30% - 80%, the thermal efficiency of 70 % - 80%. The shaft speed is 6-30rpm stepless speed regulation.

Second, vacuum rake dryer features
① The machine adopts the mezzanine and internal mixing at the same time heating, heat transfer surface, high thermal efficiency.
② The machine is set to mix, so that the material in the formation of a continuous cycle of state, to further improve the material uniformity of heating.
③ The machine is set to stir the smooth paste, paste, paste-like material drying.
④ The machine adopts mechanical seal, can control the degree of vacuum equipment.
Third, the vacuum rake dryer is mainly used for:
Medicine, food, chemicals and other industries to carry out the material drying;
Slurry, paste - like, powdery materials;
Require low temperature drying of the heat-sensitive materials;
Easy oxidation, explosive, strong stimulation, highly toxic materials;
Requires recycling of organic solvent materials.
ZB vacuum rake dryer features:
Mezzanine mixing with the heating at the same time, heat transfer surface, high thermal efficiency.
Set stirring, the material in the cylinder to form a continuous cycle of state, to further improve the material uniformity of heating.
Set stirring, which can be smooth paste, paste, paste material drying.

四、the technical parameters:

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  Putty powder cellulose vacuum rake dryer