Sorbitol, alias sorbitol. It is a white hygroscopic powder or a crystalline powder, flakes or granules, and is odorless. Depending on the crystallization conditions, the melting point varies from 88 to 102 ° C, soluble in water (1 g dissolved in about 0.45 mL of water), slightly soluble in ethanol and acetic acid. It has a cool sweet taste, about half the sweetness of sucrose, and its calorific value is similar to that of sucrose. Most of the food industry is 69-71% sorbitol liquid. Toxicity tests have shown that excessive oral administration can cause diarrhea and digestive disorders.
Sorbitol dryer Working principle:
The clean hot air is distributed into the bed through the valve plate, and the wet material entering from the feeder is boiled by the hot air. Since the hot air is in extensive contact with the material, the heat and mass transfer process is enhanced, so it can be dried in a short time. If the continuous type is used, the material enters from one end of the bed, and after boiling for several tens of seconds to several minutes, it automatically flows out from the other end of the bed. This equipment is generally operated under negative pressure.
Sorbitol dryer Adaptable materials:
◎ Drying of pharmaceuticals, chemical raw materials, food, grain processing and feed. Such as: raw material medicine, tablet granules, Chinese medicine granules, health food, beverage granules, corn germ, feed, plastic resin, citric acid and other powder materials dry and dehumidification. The applicable material has a particle size of generally 0.1 to 6 mm and a particle diameter of 0.5 to 3 mm.
Sorbitol dryer Product introduction:
Boiling fluidized bed, which is composed of air filter, heater, bubbling bed host, cyclone separator, bag filter, high-pressure centrifugal fan and operation console. Due to the different nature of dry materials, it can be equipped as needed. Considering that the cyclone separator and the bag filter can be selected at the same time, or one of them can be selected. Generally, the larger specific gravity such as the granule and the granular material are dried, only the cyclone separator is selected, and the small specific gravity is small granular and powdery. The material needs to be equipped with a bag filter, and a pneumatic feeding device and a belt conveyor are available for selection.
The granular solid material is fed into the fluidized bed dryer by the feeder, and the filtered clean air is heated and sent to the bottom of the fluidized bed by the blower to contact the solid material through the distribution plate to form a heat exchange of fluidization to achieve gas-solidity. After the material is dried, it is discharged from the discharge port, and the exhaust gas is discharged from the top of the boiling bed through the cyclone dust collector group and the bag filter to recover the solid powder and then emptied.
Vapor, electric and hot blast stoves can be used (according to user requirements).
The difference between the application of different boiling dryers in the industry:
There are many kinds of boiling dryers and they are widely used in industry. This paper will start with the principle of boiling dryer and compare the characteristics of several boiling dryers. Boiling dryer, also known as fluidized bed, has been used and improved for more than 30 years. It is now more and more important in pharmaceutical, food, chemical, food and other aspects. However, the performance of different types of boiling dryers And the application is different.
The definition of boiling drying: boiling drying, also known as fluidized drying, refers to the process of drying the solid particles in a fluidized state.
The principle of boiling and drying: refers to the drying medium to dry the solid particles in the fluidized state. The basis of the material drying process is the boiling of the powder. At the same time, under the action of exhausting, the fine powder in the container is filtered through the collecting bag. The rear row is outdoors. During drying, due to gas-solid two-phase countercurrent contact, vigorous agitation. The solid particles are suspended in a drying medium and have a large contact surface area, which is excellent in heat transfer, mass transfer, volume dry strength, and thermal efficiency.
Because of the better adaptability of boiling drying to various materials, it has smaller floor space, larger production capacity, higher thermal efficiency, easier operation control and less particle damage than other dryers. It is widely used nowadays, especially in the pharmaceutical industry. in.
1. Because the temperature distribution in the fluidized bed is uniform, thus avoiding any local overheating of the product, it is especially suitable for drying certain heat sensitive materials;
2. The residence time of the material in the dryer can be adjusted as needed, so the moisture content of the product is stable;
3. Continuous operation can be carried out in the same equipment, and intermittent operation can also be performed;
4. Since the contact area between the material and the drying medium is large, and the material is continuously stirred vigorously in the bed, the heat transfer effect is good and the heat capacity coefficient is large;
5. The drying device itself does not include mechanical moving parts, so the investment cost of the equipment is low and the maintenance workload is small.
