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Spray Dryer

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Model:High speed centrifuge,Small mini
Application : milk powder,coffee powder,washing powder,etc

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Spray Dryer-1
Spray Dryer-2
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Tip:We have warehouses in the United States and Spain, if you are nearby, you can receive the goods in 1-2 days.

We have two types of our spray dryer machine

Small spray dryer : SD-2L 

High speed centrifuge spray dryer : LPG-5L to LPG-2000L.

The drying principle of small spray dryer is the same as that of high speed centrifugal spray dryer, both of which are to atomize the material liquid into extremely small droplets, and then use hot air to instantly evaporate the moisture in the droplets.The difference is that high speed centrifugal spray dryer uses an electric high-speed centrifugal atomizer to atomize the liquid, while the small spray dryer uses a pressure nozzle for atomization.

What is a spray dryer?

The spray dryer is a process in which the water-containing materials are heated in the environment of hot air to evaporate the water vapor, separated from the materials and discharged, thereby removing the moisture in the materials to obtain small-molecule dried products. The process is carried out under high pressure of hot air, the water evaporates directly without passing through the liquid state, and the time is very short. The spray-dried products can keep their natural brilliance and breath unchanged, their appearance and appearance are unchanged, and various nutrients such as protein and vitamins are unchanged. Changes and inherent substances are not lost.

The principle of a small mini spray dryer

The air is heated by the heater and enters the drying chamber. At the same time, the material and liquid are atomized into micro/nano-scale droplets by the atomizer. When the droplets are in contact with the hot air, they are quickly vaporized and dried into the powder or granular products. Dry powder or granules The product flows into the cyclone separator with the air for separation falling into the recovery bottle, and finally, the exhaust gas is discharged.

Components of small mini spray dryer

The components of the small spray dryer is heater, fan, atomizer, drying chamber, cyclone separator, material collection bottle, waste collection bottle, etc., followed by the circuit and control system (additional: Dust removal system and other auxiliary systems)

Operation steps of small mini spray dryer machine

1. The prepared material (solvent) is transported to the atomizer through the peristaltic pump, and the atomizer atomizes the material in the drying chamber;

2. The atomized material is evaporated by hot air in the drying room, and after the water is completely evaporated, the material is introduced into the cyclone separator for solid-gas separation (induction air system or air supply system);

3. The separated material will enter the material collection bottle, and the separated waste gas will be discharged from the exhaust port (or after the secondary treatment of bag dust removal)

Application areas of small mini spray dryer machine

Mainly used in scientific research, chemical, pharmaceutical, biological, food, and other laboratories in colleges and universities, the main application fields of mini spray dryers: are beverages, spices and pigments, milk and egg products, plant and vegetable extracts, pharmaceutical synthesis, heat-sensitive plastics, Polymers and Resins, fragrances, blood products, ceramics and superconductors, biochemical products, dyes, chemical materials, soaps and detergents, food adhesives, oxides, bone meal, and tooth powder, etc.

Advantages of small mini spray dryer machine

1. The large color LCD screen is used to facilitate the user to observe the spraying process of each stage of the experimental spray during use. The touch screen parameter display can facilitate the user to control the experimental data in time, and control the start and stop faster and more accurately.

2. The mini spray dryer, drying chamber, and collection device are made of transparent high temperature resistant high borosilicate glass so that the spray drying process can be carried out in a pollution-free and stable manner.

3. The temperature control of the small spray dryer adopts real-time regulation PID constant temperature control technology, and the temperature control is accurate.

4. Realize the automatic control of small spray dryer, which can reduce the labor intensity of operators, reduce the number of operators, and reduce operating costs;

5. The spray dryer has the advantages of low price, high speed, high efficiency, and few processes.

Working principle of high speed centrifugal spray dryer machine

The air passes through the filter and heater, enters the air converter at the top of the centrifugal spray dryer, and the hot air spirals into the dryer. The feed water is sprayed from the feed water tank through filtration to a centrifugal atom at the top of the drying process where the feed water is sprayed into very small mist particles. Then the finished product is dried, the finished product is discharged from the bottom of the drying tower with a vortex separator, and hot air is discharged from the scrubber. The user can select the heating method, dust collection, and dust removal method according to the actual situation.

Composition of high speed centrifugal spray dryer machine

The components of centrifugal spray dryers are air filter, air supply, and heating system, material dehumidification cooling and conveying system, atomization system, main tower, exhaust system, jacket cooling system, Air scavenging device, pneumatic rapping system, PLC control system, etc.

Operation of high speed centrifugal spray dryer machine

1. After the air passes through the filter and the heating device, it enters the hot air distributor at the top of the drying chamber. The hot air passing through the hot air distributor enters the drying chamber uniformly in a spiral shape, and the material liquid is transported by the feed pump to the top of the drying chamber. centrifugal nebulizer;

2. The feed liquid is dispersed into extremely small mist droplets, which greatly increases the surface area of the feed liquid and hot air contact;

3. The water evaporates quickly and is dried into the powder or granular products in a very short period. Small droplets and hot airflow down and are collected from the bottom of the tower by a two-stage cyclone separator. The exhaust gas is discharged to the outside by the induced draft fan.

Application of high speed centrifugal spray dryer 

1.Can be used in the chemical industry, such as battery raw materials, basic dyes, and pigments, dye intermediates, compound fertilizers, formaldehyde silicic acid, catalysts, sulfuric acid agents, amino acids, white carbon black, etc;

2.Can be used for plastic resins, such as AB, ABS emulsion, urea-formaldehyde resin, phenolic resin, sealant (urea) formaldehyde resin, polyethylene, polyvinyl chloride, etc;

3.Can be used in the food industry, such as rice milk powder, gluten, cocoa milk powder, milk replacer, animal blood meal, egg white (yellow) whole egg powder, etc.; 

4.Can be used in food and plants, such as oat, chicken juice, coffee, instant tea, seasoning Spice meat, protein, soybean, peanut protein, hydrolyzate, etc;

5.Can be used for sugars, such as corn steep liquor, corn starch, glucose, pectin, maltose, potassium sorbate, etc;

6.Can be used for drying ceramic materials, such as alumina, tile materials, magnesia, and talc.

Advantages of high speed centrifugal spray dryer

1. The drying rate is high, the water surface of the material increases after atomization, and 95% -98% of the water can be absorbed by a continuous stream of hot air. It only takes 5-15 seconds to complete the drying time with the instant drying tools.

2 Special air distribution equipment reduces equipment friction and ensures efficient air conditioning during drying.

3 The production process is simplified, and suitable for continuous production control, the liquid with a moisture content of 40-90% can be dried into powder at one time, and the process of crushing and screening is reduced to improve the product purity.

4. The material can complete the drying process in a short time, which is suitable for the drying of heat-sensitive materials, and can maintain the color, aroma, and taste of the material.

5 The product has good dispersibility, fluidity, and solubility, and the product particle size, looseness, and moisture can be adjusted within a certain range.

Spray drying technology has advantages over other drying technologies

(1) Drying is carried out in high-heat air, with very little oxygen, easily oxidized substances are protected, and sterilization or inhibition of the vitality of some bacteria due to lack of oxygen.

(2) Drying is carried out under slight high pressure, and the material being spray-dried will not be oxidized and deteriorated.

(3) Drying is carried out under hot air, and the heat-sensitive components that are easily deployed in the material will not be denatured or lost their vitality, especially the protein product spray will not change the structure of the protein.

(4) The spray-dried material can form atomized small molecules, which can keep the original shape after drying, and will not shrink, and the interior has a loose and porous sponge structure.

(5) The spray dryer is thoroughly dehydrated and can remove about 90% to 95% of the moisture during drying. After drying, it can be retained at room temperature for a long time, and it is easy to transport due to its lightweight.

(6) The spray dryer has good rehydration, and the spray-dried products can quickly absorb water and recover, and their brilliance and quality are the same as fresh products.

Parameter

Model

Inlet temperature

 (°C)

Moisture maximum evaporation (kg/h)

Rotating speed (r.p.m)

Diameter of spray

disc (mm)

Electric heating

power (kw)

LPG-5

140-350

5

25000

50

9

LPG-10

140-350

10

25000

50

20

LPG-25

140-350

25

18000

100

36

LPG-50

140-350

50

18000

120

63

LPG-100

140-350

100

18000

140

81

LPG-150

140-350

150

15000

150

99

LPG-200-2000

140-350

200-2000

8000-15000

180-340

According to

 the actual situation

Model

Inlet temperature

 (°C)

Moisture maximum evaporation (kg/h)

Rotating speed (r.p.m)

LPG-5

140-350

5

25000

LPG-10

140-350

10

25000

LPG-25

140-350

25

18000

LPG-50

140-350

50

18000

LPG-100

140-350

100

18000

LPG-150

140-350

150

15000

LPG-200-2000

140-350

200-2000

8000-15000

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