Spray Dryer Unit Used In Pharmaceutical
Technical principle of spray dryer:
The basic principle of the spray dryer is to transport the material through the filter to the atomizer at the top of the spray dryer used in pharmaceutical through a pump, and the liquid material is dispersed into droplets by the atomizer, because the droplet radius is small, the specific surface area and surface không lấy phí energy are large, And it is highly dispersed, and the vapor pressure on the surface of the droplet is greater than that under the same conditions, so the water volatilizes very quickly and the product dries quickly. The theoretical research on the thermal drying mechanism of spray dryer unit is carried out, which is of great significance to improve the level of spray drying technology. Suitable for the production of powdered and granular solid products from solutions, emulsions, suspensions and pasty liquid raw materials.
Therefore, spray dryer unit is a good process when the particle size distribution, residual moisture, bulk mật độ trùng lặp từ khóa and particle shape of the finished product meet precise standards. After the air is filtered and heated, it enters the air distributor at the top of the dryer, and the hot air enters the drying chamber uniformly in a spiral shape. The feed liquid passes through the high-speed centrifugal atomizer at the top of the tower, and is (rotated) sprayed into extremely fine mist-like liquid droplets, which are in co-current tương tác with hot air, and can be dried into finished products in a very short time. The finished product is continuously output from the bottom of the drying tower and the cyclone separator, and the exhaust gas is discharged by the người yêu thích.
Spray Dryer Technical Features:
The drying speed is fast and the product quality is guaranteed. Food contains many proteins and sugars. Proteins generally undergo chemical changes when kept at 60-80°C for a few minutes. Maillard reactions will also occur when placed at high temperatures. Using spray dryer used in pharmaceutical, the product can be dried in only 3-10 seconds, which can effectively inhibit the deterioration of food and the loss of aromatic components during the drying process, and ensure product quality.
The dried product has good dispersibility, fluidity and solubility. In the spray drying process, the product is dried in hot air, so the product can basically maintain a spherical shape similar to the droplet phase, giving it good dispersibility, fluidity and solubility. Most of the products obtained by spray drying do not need to be crushed and screened, thus reducing the production process and simplifying the production process. The particle size, bulk mật độ trùng lặp từ khóa and moisture of the product can be adjusted by changing the operating conditions within a certain range. The control and management are very convenient and can meet the requirements of industrial scale production. Prevent the occurrence of pollution and improve the production environment. Since spray dryer unit is carried out in a closed container, dust flying during the drying process can be avoided and environmental pollution can be avoided.
Problems with spray drying：
The advantages of spray drying technology are significant, but its disadvantages cannot be ignored. The disadvantages are mainly manifested in large power consumption, low volume heat transfer coefficient and thermal efficiency, large equipment volume, easy to stick to the wall, and large investment. Especially for the wall sticking problem, if the sticking wall material stays on the hot inner wall for a long time during the spray dryer used in pharmaceutical process, it may be scorched or deteriorated, affecting the product quality. By analyzing the types and causes of spray-drying sticking, three types of spray-drying sticking were found: semi-wet material sticking, low-melting material hot-melt sticking and dry powder surface sticking.
The function of spray drying：
The drying tốc độ is fast, and the surface area of the material and liquid is greatly increased after atomization. In the hot air flow, 95%-98% of the moisture can be evaporated instantly, and the drying time only takes a few seconds. Especially suitable for drying heat-sensitive materials. For liquids with a moisture nội dung of 40-60% (up to 90% for special materials), it can be dried into powder products at one time, without crushing, screening and drying, reducing production processes and improving product purity. Product particle size, bulk mật độ trùng lặp từ khóa and water nội dung can be adjusted within a certain range by changing the operating conditions, and the control and management is very convenient.
Compatible material:
Chemical industry: sodium fluoride (potassium), basic dyes and pigments, dye intermediates, compound fertilizers, formaldehyde silicic acid, catalysts, sulfuric acid agents, amino acids, white carbon Black, etc. Plastic resin: AB, ABS emulsion, urine formaldehyde resin, phenolic resin, dense rubber (urea) formaldehyde resin, polyethylene, polyvinyl chloride, etc. Food industry: rich milk powder, gluten, cocoa milk powder, milk replacer powder, blood hunting powder, egg white (yellow), etc. Food and plants: oat, chicken juice, coffee, instant tea, seasoned meat, protein, soybean, peanut protein, hydrolyzate, etc. Ceramics: alumina, tile materials, magnesia, talc, etc.
