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The principle of a small spray dryer:
The spray dryer small scale can be described as a multi-purpose machine, which can not only dry the materials but also perform granulation work. The machine has the advantages of fast drying speed, high uniformity, good fluidity and solubility, high drying purity of the product, and sterilization function. At present, spray dryers small scale has been widely used to dry some heat-sensitive liquids, suspensions, and viscous liquids, such as milk, egg liquid, medicinal materials, extracts, inorganic salts, etc. The drying quality of materials is very ideal. The laboratory vacuum spray dryer for sale is specially developed for heat-sensitive materials. The whole machine is compact and self-contained and can be operated without other facilities. One-button start-up, large color LCD touch screen operation, fully automatic or manual monitoring two operating modes can be used, which is convenient for operation and monitoring of the experimental process, especially the instant drying of materials under low-temperature conditions, which is extremely convenient for heat-sensitive materials. Extremely safe drying methods include biological products such as enzyme preparations and live bacteria, natural product extracts of traditional Chinese medicine with high sugar content, heat-labile polymer materials, materials that vaporize when heated, etc.
The working principle of spray dryer:
After filtering and heating, the air enters the air distributor at the top of the dryer, and the hot air enters the drying chamber evenly in a spiral shape. The feed liquid passes through the high-speed centrifugal atomizer at the top of the tower body, (rotationally) sprays into extremely fine mist-like liquid droplets, which can be dried into finished products in a very short period in co-current contact with hot air. The finished product is continuously output from the bottom of the drying tower and the cyclone separator, and the exhaust gas is evacuated by the fan. The working process of the spray dryer small scale is that the material and liquid are input through the diaphragm pump at high pressure, sprayed with mist droplets, and then flow down with the hot air. Most of the powder particles are collected by the discharge port at the bottom of the tower. The separator is separated, the exhaust gas is discharged by the exhaust fan, and the powder is collected by the pollination cylinder located at the lower end of the cyclone separator. When the material liquid is fed into the feeding pipe of the atomizer, after one or two distributions of the material and liquid, it is quickly sent to the high-speed rotating atomizing disk. It stretches to form a thin film and moves to the edge of the disc at an increasing speed. When it leaves the edge of the disc, the material liquid is atomized, with drop-like, filamentous, and film-like splits. Which split is the main one depends on the speed of the atomizer, the amount of feed, the properties of the material and liquid, and the shape and diameter of the atomizing disc are related to factors such as the shape and diameter of the atomizing disc, and the size of the droplet mainly depends on the peripheral speed of the atomizing disc.
Composition of small spray dryer:
The small spray dryer for sale is composed of fans, heaters, air compressors, peristaltic pumps, and atomizers. It is mainly used in universities, research institutes, and laboratories of food, medicine, and chemical enterprises to produce micro-particle powders. It is suitable for all solutions such as emulsions, Suspension has broad-spectrum applicability, and scale-up production needs to start from the small tests, so the use of laboratory spray drying equipment is an important step to explore data in the early stage. The loss and waste of materials are caused by the use of production equipment for experiments. Using a menu-type microprocessor controller, it is possible to directly set the inlet temperature, airflow, automatic needle penetration frequency, and peristaltic pump speed to realize data acquisition and process monitoring and control. The self-priming peristaltic pump sends the sample liquid from the container through the nozzle into the drying chamber, while the compressed air enters the drying chamber from the outer sleeve to make the liquid micronized, and the hot air enters from the upper layer to meet the sprayed liquid particles, and the items begin to dry, dry The latter particles are separated from the waste gas by the cyclone separator and then enter the collection bottle, and the waste gas is directly discharged to the atmosphere or air filter device through a diameter hose.
Advantages of small spray dryer:
The whole machine of the spray dryer small scale is treated with anti-corrosion. It adopts double-stage heating, and the set temperature is reached in one or two minutes, which is convenient and quicker to start the experiment. Compared with another spray dryer for sale on the market, it has a lower moisture content in the power output; the nozzle adopts a concentric nozzle. Design, continuous uniform atomization during the experiment and the material does not stick to the wall; the user-friendly main interface setting does not require frequent switching during the experiment, and the experimental parameters can be saved for next use; the interface is sealed with a gasket and a fully enclosed clamp, do not leak.
The process of using the spray dryer:
Many benefits can be enjoyed by using a small spray dryer to dry different materials. It can dry the material into powder in a short time, which not only effectively improves the drying efficiency but also saves some processing links and simplifies the processing process. In addition, using a small spray dryer for drying can also be flexibly adjusted according to actual needs to meet different drying needs. From the analysis of the actual work situation, the drying process of the spray dryer can be divided into five steps.
The first stage is material preparation, which is actually to prepare the materials that need to be dried in advance.
The second stage is to atomize the material so that the drying area of the material can be increased and the drying process can be accelerated.
The third stage is drying, which means that the spray dryer for sale dries the material according to the set process conditions so that the moisture can quickly evaporate from the surface of the material.
The fourth stage belongs to the separation of wet gas powder.
The fifth stage is cooling and packaging.
From the content introduced above, we can know that in operating the small spray dryer, reasonable parameters should be set according to its process conditions and material properties to ensure the drying effect.
