FORST VER KURSUS GRUNDL GGE

Centrifugal Atomizer • Resistent against aberration, erosion.. • Control of particle size • Insensitive towards block up of nozzle holes • Easy regulation of feed rate • High life time

APV Systems • Esscor • Foxboro • SimSci • Triconex • Walsh

Atomizers

Atomization

Principle:

•Acceleration of a fluid

•Atomization by friction with the ambient air

Drying in a Spray Tower (Air temperature

What kind of atomizers do we use

Centrifugal Atomizer

• Resistent against aberration,

erosion.

• Control of particle size

• Insensitive towards block up of

nozzle holes

• Easy regulation of feed rate

• High life time (25 years)

High Pressure Atomizer

•Control of particle size, small speading

•Good Agglomeration

•Easy regulation of feed rate (CFN)

•Variable spray angle

•Variable placement

•Variable number of nozzle characteristics

Two Fluid or pneumatic Nozzles

•Easy to operate and control

•Cheap for small plants (Power

consumption)

•Small particles

•Easy regulation of feed rate

Atomizers

(a) HCA-400 Centrifugal Atomizer for large feed rates

(b) HP Nozzle Atomizer optimized for high quality of

agglomerated milk powder

Airdistributor for both nozzle- and

centrifugal atomizer

•Simpel to change between the

atomizers

•Keep the same air distribution

279

Nozzle Atomizer

Nozzle Atomizer

Center Nozzles

Product

Product Fines

Ring Nozzles

K64 KØ 11

-Air Distribut or

Variable placemen t

Compact Nozzle Atomizer CN

271

• Equals the size of a centrifugal atomizer be placed in the same insert cone

• The capacity is regulated by the amount of nozzles

Nozzle Atomizer HP and HPV

HPV 1/1019

HP Nozzle Atomizer in the stand

K64 KØ 15

The Nozzle

Pressure-Swirl Nozzle (Simplex Nozzle)

Bottom Plate

Swerl chamber

Orifice Disc

Controled flow Nozzle

Centrifugal AtomizerWhat next ?

Air Distributor with Centrifugal

Motor

Atomizer Wheel

Centrifugal Atomization

271

Air distributor Insert Cone Wheel

Mist of Droplets

Types, Sizes and choice

RPM for Atomizer Wheel

•Normal speed means a peripheral velocity at 130 m/s

•High speed means peripheral velocities between 160-200 m/s

•Low speed means peripheral velocities between 60 og 100 m/s

Atomizer Capacities

Atomizer type Motor

[kW] max Feedrate [Kg/h] RPM [ %] RPM [min -1 ]

CF-100-AC 1.1 96150 125100 31.50025.000

CE-250 30.0 3.2705.110 125100 12.50010.000CF-250 55 6.0009.370 125100 12.50010.000CC-400 150 13.00025.500 140100 8.8006.400CD-400 396 32.40067.490 140100 8.8006.400HCA-400 560 48.70095.440 140100 8.8006.400

Centrifugal Atomizer CF-250

• Sterile Air

• Steam injection

• EX proof edition

HCA-400 Centrifugal Atomizer

•High capacity

• Especially used for smoke purification by de-sulphorization

92

6

•Standard wheels consist of stainless steel and are used when you have no special demands to the wheel

•Special wheels are nozzle wheels and cup wheels

•You can use other materials such

as titan and hasteloy (Corrrosion resistant)

Special Wheels

(a) Nozzle wheel designed for abravesive products (Gives a high fluid capacity)

1 Silicium carbide tiles

2 Silicium carbide nozzles

3 Spindle

4 Cover nut

5 Tightening Ring

6 Cover Plate

(b) Cup wheel for special products (Gives a more restricted particle distribution and smaller

airpockets in the particles and therefore greater density )

Nozzle Wheel with Carbide Parts

Cup Wheel with Carbide Parts

C-250 S-Wheel

End of Course

273

Fremvisning af forstøverenHvad nu ?