Comparison of pressure spray dryer and centrifugal spray dryer

Classification introduction

Spray Dryer is a one-step direct drying method from raw material solution to finished powder.

- Centrifugal

Centrifugal spray is a kind of spray drying method after liquid is atomized by high-speed centrifugal atomizer.

-pressure

Pressure spray is a spray drying method in which liquid is atomized through a spray gun by a high-pressure pump

- closed loop

Closed-circuit spray Dryer is a spray drying method that uses inert gas as a circulating medium

Selection

The selection of spray drying is to select the most suitable spray drying method according to the characteristics of raw materials, moisture content, raw material state, and finished product form.

-working principle

The working principle of centrifugal spray drying: After the raw material is atomized by the centrifugal atomizer, a specific surface area of the raw material is increased, and the heat exchange with the hot air of our spray dryer is instantaneous, and the moisture of the raw material is evaporated instantly, and our powder product is obtained. .

The working principle of pressure spray drying: The raw materials are transported to our pressure spray gun through a high-pressure diaphragm pump. Under the action of high pressure, the raw materials are atomized through the nozzle of the spray gun, and then contact with the hot air of the equipment instantly to evaporate the water to obtain our products.

Principle of closed-circuit spray dryer: The closed-circuit spray dryer circulates in the spray dryer equipment through inert gas, and is aimed at the spray drying of raw materials containing organic solvents, and other toxic and harmful substances.

- Differences in materials

The Centrifugal Spray Dryer is atomized by a high-speed centrifugal atomizer. The rotation speed is faster, the atomization is more uniform, and the obtained product powder is relatively fine.

The Pressure Spray Dryer is atomized by a spray gun, the nozzle of the spray gun can be adjusted, the atomization cone angle is controllable, and the product is small granular or spherical with good fluidity.

Differences in different application areas

Centrifugal spray dryers are used in some common pharmaceutical intermediates, plant extracts, hydrolyzed proteins, chemical raw materials, new materials and other related fields.

Pressure spray dryers are used in some common dairy industries, non-dairy creamers, dyes, and some related fields that require large particles and good fluidity

application

-food

Hydrolyzed protein, seasonings, plant extracts, natural pigments, eggs, plasma blood cells, dairy products, enzymes, etc.

-Pharmaceuticals

APIs, Chinese herbal extracts, pharmaceutical excipients, antibiotics, etc.

-Chemical

Organic chemistry, inorganic chemistry, dyes, resins, detergents, active agents, etc.

-new material

Ceramics, lithium batteries, magnetic materials, etc.