High speed centrifugal spray dryer

The whole process of high-speed centrifugal spray dryer can be divided into three main stages:

Atomization stage

The liquid material is pumped onto a high-speed rotating centrifugal atomization disc at the top of the drying chamber (usually at a speed of several thousand to tens of thousands of revolutions per minute).

Under the tremendous centrifugal force, the liquid is pulled into a thin film and thrown out from the edge of the atomization disk, forming countless extremely small and uniform droplets.

Drying stage

At the same time, filtered and heated hot air (or inert gas) is sent into the top of the drying chamber and comes into contact with the droplets in a co current or counter current direction.

Due to the large surface area of fog droplets, moisture (or solvent) will rapidly evaporate upon contact with hot air.

This process is completed within seconds to tens of seconds, making it very friendly to thermosensitive materials (such as food and medicine) and able to retain their activity.

Separation and Collection Stage

The dried powder falls to the bottom of the drying chamber and is collected by the discharge device (such as cyclone discharge device, star valve).

The exhaust gas carrying a small amount of fine powder enters the cyclone separator and/or bag filter to recover the fine powder, and the clean gas is finally discharged by the exhaust fan.

Main features and advantages

Product particle uniformity: Centrifugal atomization can produce uniformly sized droplets, resulting in a narrow particle size distribution and good flowability of the obtained powder particles.

Handling high viscosity: capable of handling liquids with high viscosity or containing certain solids.

Flexible operation: By adjusting parameters such as the speed, feed rate, and inlet air temperature of the atomizing disc, the particle size and moisture content of the product can be controlled within a certain range.

High automation, continuous production: can achieve 24-hour continuous operation, suitable for large-scale industrial production.

Wide applicability: it can be used for various forms of materials such as solution, lotion, suspension, etc.

Main application areas

High speed centrifugal spray dryer in many industries:

food industry

Milk powder (whole fat, skimmed), egg powder, coffee quick solvent, fruit and vegetable powder (such as strawberry powder, banana powder), plant protein powder, seasoning, etc.

chemical industry

Dyes, pigments, ceramic powders, detergents, polymers (such as resins, plastics), inorganic salts, etc.

Pharmaceutical and Bioengineering

Antibiotics, enzyme preparations, traditional Chinese medicine extracts, probiotics, culture media, etc. Here, there are requirements for hygiene and heat sensitivity.

Environmental Protection and Others

Process industrial waste liquid by fixing harmful substances into solid powder for easy transportation and disposal.

The product name is collagen peptide powder. It is an edible small molecule protein extracted from fresh sheepskin. The concentration of the extraction solution is between 6% and 10%, pH5-7， Then, after separation, purification and concentration, the concentrated solution with a concentration of about 25% (membrane concentration) or 40% (vacuum concentration) is obtained, and then spray drying is performed to obtain powdered products with mesh size of about 80-120 meshes and volume weight of about 0.5g/ml. Applied in the food, health products, pharmaceuticals, and cosmetics industries, as a functional food ingredient, it can also be consumed directly.

This protein concentrate has a certain viscosity and is a thermosensitive substance. The resulting powdered product requires a good color (white or light yellow).

Technical parameters of high-speed centrifugal spray dryer LPG -100:

Production: 100 kilograms per hour;

Product moisture content: ≤ 4%;

Heating method: steam+electric compensation;

The atomization disc is adjustable by frequency conversion, and the overall material requirement is SUS304 stainless steel. The inner wall is mirror polished, and the outer wall is polished. The material does not hang on the wall or suck on the top;

Product yield ≥ 97%;

Inlet temperature is 185-210 ℃, outlet temperature is 70-80 ℃, centralized material collection, water film dust removal. Try to be sterile and require a total bacterial count of ≤ 1000CFU/g;

Technical specifications of high-speed centrifugal spray dryer

Note: The evaporation rate of water is related to the characteristics of the material and the temperature of the hot air inlet and outlet. When the outlet temperature is 90^oC, The water evaporation curve is shown in the above figure (for selection reference). As the product is constantly updated, relevant parameters may change without prior notice.