Freeze-drying is a technique of drying by the principle of sublimation. It is a process in which the dried substance is rapidly frozen at a low temperature, and then the frozen water molecules are directly sublimated into a water vapor escape process under a suitable vacuum environment. The product obtained by drying is called a lyophilizer, and the process is called lyophilization.
The substance is always in a low temperature (freezing state) before drying, and the ice crystals are uniformly distributed in the substance, and the sublimation process does not cause concentration due to dehydration, thereby avoiding side effects such as foaming and oxidation caused by water vapor. The dry material is porous in the shape of a dry sponge, the volume is basically unchanged, and it is easily soluble in water and restored to its original state. The physicochemical and biological denaturation of dry matter is largely prevented in Zui.
There are heat carrier inlet and outlet pipes on each layer of heating plate. Generally, the upper layers are made of low-pressure saturated steam or hot water, hot oil in series, parallel or series-parallel input heating to control the temperature of each layer; and the bottom two layers are connected to cooling water. To reduce product temperature, recover heat and ensure quality. The heating plate is fixed on the frame of the cylinder at a certain interval, and is placed horizontally. Each layer is equipped with a cross arm frame, and the upper and lower layers are staggered and fixed at 45° on the central spindle, and the worm wheel reducer and the continuously variable transmission are arranged. And the motor and other drives, slowly rotate at 0.6~3.7 (r/min). Each of the booms is provided with a plurality of detachable hoe-shaped rakes or flat squeegees arranged equidistantly. The 耙 leaf adopts hinged and reed oscillating structure, so that the bottom edge floats evenly on the disk surface, and the angle of the 耙 leaf can be adjusted arbitrarily according to the material properties to ensure that the material is continuously advancing on the disk surface.
The material to be dried is continuously fed from the top disc feeder to the inner ring surface of the small heating plate on the top of the machine. Under the mechanical action of the rotary rakes, while tumbling and stirring, the product is continuously moved forward from the inside to the outside. It is zigzag covered on the entire surface of the plate and heated by contact; then the material falls from the outer edge to the outer surface of the outer layer of the second heating plate below, and is moved from the outside to the inside under the action of the reversely mounted raft leaves. The inner edge falls to the inner ring surface of the third heating plate. By analogy, the materials are moved layer by layer from top to bottom, and are continuously heated and dried.
The evaporated moisture is mixed with the exhaust gas in the equipment and naturally discharged from the upper outlet. The final dry material of the Zui falls onto the lower tray, and is continuously discharged from the raking blade to the bottom discharge opening to obtain a qualified dry product. According to product performance, drying requirements and processing capacity, the plate dryer adopts a series of steps such as stepless speed regulation of the spindle, manual adjustment of the height of the disc feeder to adjust the height of the heating plate, control of the temperature distribution of each layer of the heating plate, and final cooling and cooling. The superior performance of the plate dryer.
The substance is always in a low temperature (freezing state) before drying, and the ice crystals are uniformly distributed in the substance, and the sublimation process does not cause concentration due to dehydration, thereby avoiding side effects such as foaming and oxidation caused by water vapor. The dry material is porous in the shape of a dry sponge, the volume is basically unchanged, and it is easily soluble in water and restored to its original state. The physicochemical and biological denaturation of dry matter is largely prevented in Zui.
There are heat carrier inlet and outlet pipes on each layer of heating plate. Generally, the upper layers are made of low-pressure saturated steam or hot water, hot oil in series, parallel or series-parallel input heating to control the temperature of each layer; and the bottom two layers are connected to cooling water. To reduce product temperature, recover heat and ensure quality. The heating plate is fixed on the frame of the cylinder at a certain interval, and is placed horizontally. Each layer is equipped with a cross arm frame, and the upper and lower layers are staggered and fixed at 45° on the central spindle, and the worm wheel reducer and the continuously variable transmission are arranged. And the motor and other drives, slowly rotate at 0.6~3.7 (r/min). Each of the booms is provided with a plurality of detachable hoe-shaped rakes or flat squeegees arranged equidistantly. The 耙 leaf adopts hinged and reed oscillating structure, so that the bottom edge floats evenly on the disk surface, and the angle of the 耙 leaf can be adjusted arbitrarily according to the material properties to ensure that the material is continuously advancing on the disk surface.
The material to be dried is continuously fed from the top disc feeder to the inner ring surface of the small heating plate on the top of the machine. Under the mechanical action of the rotary rakes, while tumbling and stirring, the product is continuously moved forward from the inside to the outside. It is zigzag covered on the entire surface of the plate and heated by contact; then the material falls from the outer edge to the outer surface of the outer layer of the second heating plate below, and is moved from the outside to the inside under the action of the reversely mounted raft leaves. The inner edge falls to the inner ring surface of the third heating plate. By analogy, the materials are moved layer by layer from top to bottom, and are continuously heated and dried.
The evaporated moisture is mixed with the exhaust gas in the equipment and naturally discharged from the upper outlet. The final dry material of the Zui falls onto the lower tray, and is continuously discharged from the raking blade to the bottom discharge opening to obtain a qualified dry product. According to product performance, drying requirements and processing capacity, the plate dryer adopts a series of steps such as stepless speed regulation of the spindle, manual adjustment of the height of the disc feeder to adjust the height of the heating plate, control of the temperature distribution of each layer of the heating plate, and final cooling and cooling. The superior performance of the plate dryer.
P,P-Dichlorophenylphosphine CAS No.644-97-3
Dichlorophenylphosphine Basic Information
Product Name: Dichlorophenylphosphine
CAS: 644-97-3
MF: C6H5Cl2P
MW: 178.98
EINECS: 211-425-8
Mol File: 644-97-3.mol
Dichlorophenylphosphine Chemical Properties
Melting point: −51 °C(lit.)
Boiling point: 222 °C759 mm Hg(lit.)
Density: 1.319 g/mL at 25 °C(lit.)
Fp: >230 °F
Storage temp. :Store below +30°C.
Form: Liquid
Specific Gravity: 1.319 (20℃)
Color: Clear colorless to slightly yellow
Sensitive: Moisture Sensitive
Phenylphosphonium dichloride,Diphenylphosphine chloride,Phenylphosphinic acid,2-hydroxyethylphenylphosphinic acid,Phenylphosphonic dichloride,Phenylthiophosphonochloride
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