Centrifugal Hot Gas Spray Dryer

Centrifugal Hot Gas Spray Dryer

Product description Spray drying is a method of producing dry powder from liquid or slurry materials by rapidly drying with a hot gas. This is the preferred method of drying of many thermally-sensitive materials such as foods and pharmaceuticals. Liquid material is pumped into the top installed...

Product description

Spray drying is a method of producing dry powder from liquid or paste-like materials by rapidly drying hot gas. This is the preferred method for drying many heat-sensitive materials such as food and medicine.


The liquid material is pumped into the top-mounted rotating disc atomizer through a single pump, and atomized into fine droplets in the drying chamber. The heated clean hot air is blown into the air distributor at the same time. The uniform and swirling hot air is in complete contact with the droplets for heat transfer. The droplets are dried into powder in a few seconds, and then sucked into the cyclone separator to be discharged through the exhaust fan.


LPG series spray dryers have been widely used in the pharmaceutical, chemical and food industries to dry liquid materials into fine powders.

Spray Dryer

Spray Dryer

main features

1) Particle size control: The dry particle size can be easily controlled through the atomization of the liquid feed and the design of the hot gas inlet. The spray dryer usually produces a bell-shaped distribution with an average particle size between 30 and 500 microns.


2) Evaporative cooling of the product: The heat and mass transfer during drying occurs in the air and vapor film around the droplets. This protective layer of vapor keeps the particles at the saturation temperature. As long as the particles do not become "dry bones", evaporation will still occur, and the solid temperature will not approach the dryer outlet temperature.


3) Short residence time: The surface area generated by the atomization of the liquid feed can make the gas residence time short, depending on the application, in the range of 3-10 seconds, which allows spray drying without thermal degradation.


4) Flow characteristics of dried products: Most spray-dried particles are spherical in shape, which can provide fluid-like flow characteristics. This makes many downstream operations (such as packaging, pressing, filtering and processing) easier and cheaper.


5) Design of the size of the drying chamber: The size of the drying chamber is specially designed to prevent the droplets from sticking to the inner wall, so that the dry powder accumulates on the conical part, and ensure sufficient residence time.

main parameter

Main Technical Parameters




Model

LPG-3

LPG-5


Drying chamber diameter mm

1000

1200


Atomizer type

Centrifugal disc atomizer/0.4KW

Centrifugal disc atomizer/0.4KW


Evaporation capacity kg/h

3-5

5-8


Inlet hot air temperature ℃

60-300 (PLC control)

60-300 (PLC control)


Outlet hot air temperature ℃

80-90

80-90


Electrical heater KW

12

18


Exhaust fan

Fan model

9-19-4A/2.2KW

9-19-4A/3KW

Rotation speed RPM

2900

2900


Air pressure Pa

3584-3597

3507-3253


Air flow rate M3/h

824-1264

1410-1704


Noise db

<75

<75


Product collection

Two-stage cyclone

or cyclone+bag filter

Two-stage cyclone

or cyclone+bag filter


Product collection rate %

≥98%

≥98%


Dimension mm

1800x1200x2200

2000x1800x2200


Weight kg

400

600


Power supply type

240/380/416V, 50/60Hz, 3P

240/380/416V, 50/60Hz, 3P


Spray Dryer

Spray Dryer

Spray Dryer

Spray Dryer

Spray Dryer

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