Short Path Distillation Apparatus For Sale

According to its working principle, the short-path distiller is a tongue-type film evaporator with an internal condenser. It is a new type of high-vacuum thin-film distillation device and a high-tech equipment. In this industrial short path distillation, the vapor flow pressure drop is extremely small, the operating vacuum is high, the material temperature is low, the residence time is short, and the thermal decomposition is minimal. This equipment is suitable for continuous evaporation of high-boiling, high-degree and temperature-sensitive materials. , In the production device with the evaporation area of 0.3~40cm”, the distance between the evaporation surface and the condensation surface is 10-50cm, and under the pressure of 100-0.1Pa, the distillation capacity is as low as 5g and up to 5t/h. Material level.
 
This This kind of short path distillation apparatus is a mild, efficient and economical distillation. This kind of distillation is especially suitable for the warm temperature of fatty acids, mono- and diglycerides, animal and vegetable oils, anti-aging agents, fatty alcohols, sterols and vitriol.And separation, concentration and purification, it has broad and good application prospects in the field of oleochemical industry.

 

Short path distillation applications:

Simple short path distillation system is proven to be a high-quality, efficient and economical short path distillation apparatus separation method in chemical, petrochemical, pharmaceutical, plastic, fiber, food and cosmetic industries. Components that could not be distilled in the past are now effectively separated. Short-path distillation also has a broad application field in the oleochemical industry, and will show a bright prospect for the in-depth development and utilization of oils and their by-products.
 

The structure of the short-path distillation machine:

The structure of the short path distillation uses machine The short-path distillation machine is mainly composed of seven major components including heating cylinder, internal condenser, rotating brush device, distribution plate, liquid collecting tank, driving device and sealing device.
 
Heating Simplified
The heating cylinder is an upright cylinder, the inner surface is an evaporation surface, and a heating jacket is arranged outside to form a heat treatment area. A liquid high-temperature heating medium is passed through the jacket, and the constant temperature is circulated. Or by steam condensation heat transfer or steam heating, and heat transfer matching. Small experimental devices can also be heated by annular electrical tubes or by winding heating wires.
 
Internal condenser
The condenser is placed in the center of the heating cylinder. In small laboratory devices, the internal condenser is often made into a coil type. In larger test devices and large-scale production devices, the condensers are generally of tubular type, and the condenser tubes are arranged vertically and circumferentially. According to the size of the condensation area, it can be one or more layers, and some have as many as management layers. A certain vacuum channel is reserved in the center of the condenser, and there is also a thicker central tube in the center. The inlet and outlet of the condensed water are all arranged at the lower end of the condenser.
 
Rotary brushing device
In the short path distillation uses machine, in the annular space between the heating surface and the condensing surface, on the side close to the heating surface, a rotating brushing device is installed. This device is similar to the movable scraper device in a wiped-blade evaporator. The brush element structure has
There are many types, including radial sliding type, helical tooth meshing type, roller scraping type and brush type.
 
distribution plate
The distribution plate is located in the upper part of the cylinder of the distillation machine, and is driven to rotate by the shaft. The material flows down from the feeding port, continuously falls into the distribution plate, and is thrown to the inner wall under the action of centrifugal force to make it evenly distributed.
 
sump
The liquid collecting tank is located in the lower part of the evaporation cylinder, and the distillation residue flowing down the evaporation surface is collected in this tank, and the l ear is discharged from the residual liquid port on the side of the cylinder. Because the short-path distillation residue is generally thicker, more viscous, and has poor fluidity, the bottom surface of the sump is designed as an inclined plane, and the residual liquid port is located on the lower side of the inclined plane. Below the liquid collecting tank, there is a vacuum exhaust port opposite to the residual liquid outlet. There is a distillate outlet on the lower tube plate or on the side.
 
drive
The rotation of the feeding distribution plate and the brushing device is driven by the rotating shaft installed in the center of the top, and the shaft is driven by direct power transmission and indirect transmission. The direct drive is driven by the top-mounted reducer directly coupled to the shaft. The indirect transmission is that the reducer with motor is installed on the top side, and the V-belt pulley on the upper end of the shaft is driven by the V-belt to make the shaft rotate. In the experimental equipment, it is mostly driven by a speed-regulating motor and a triangular tape combination device to facilitate speed regulation.
 
Sealing means
In the short-path distillation machine, the seal of the rotating shaft is a high-vacuum dynamic seal. Mechanical seal types such as double-end unbalanced mechanical seals can be used, and the sealing capacity can reach 13Pa. Using a new type of magnetic fluid seal, the sealing capacity can reach 10 "fall Fa. It can also be driven by magnetic force to convert the dynamic seal of the shaft into a static seal, effectively improving the sealing capacity.

 

How Short Path Distillation Works:

br /> In short-path distillation, the material to be distilled is continuously fed into the distillation machine by the pump through the feed port, and is evenly distributed along the inner circumference by the rotating distribution plate. The scraping blade or roller of the rotating brushing device moving along the evaporation area further spreads the material on the heating wall into a thin film under the action of a strong eddy current. The components moving in the circumferential direction coincide.
 
When the low boilers evaporate, the liquid film is constantly replenished and renewed. Uniform wetting and excellent eddy currents are maintained on the membrane, thus creating ideal conditions for heat and material exchange. The low boiler vapor flies from the evaporating surface to the condenser surface with almost no pressure loss and condenses. And it flows down the pipe to the bottom, and is discharged from the distillate outlet. The non-condensable and hard-condensable gases in the steam go down along the inter-tube or central vacuum channel, pass through the middle channel of the liquid collecting tank, and be discharged from the vacuum port. The unevaporated part flows down the heating inner wall, reaches the liquid collecting tank within a few seconds, and is discharged through the residual liquid outlet on the side of the tank bottom.
 
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