FORST VER KURSUS GRUNDL GGE

Atomizers APV Systems • Esscor • Foxboro • SimSci • Tricone Agenda • Atomization • What kind of atomizer we use • Nozzle Atomization − Pressure Nozzles − Two Fluid Nozzles • Centrifugal Atomization − Types Atomization Principle: •Acceleration of a fluid •Atomization by friction with the ambient air Drying in a Spray Tower (Air temperature profile) 200 -110 oC 110 -105 oC 105 -100 oC 100 - 95 oC 95 - 80 oC 80 - 60 oC 60 - 284 C o T in : 200 oC T out : 100 oC What kind of atomizers we use Atomizers Centrifugal Atomizer High Pressure Atomizer • •Control of particle size, small Resistent against aberration, erosion • • • • Control of particle size speading Insensitive towards block up of •Good Agglomeration nozzle holes •Easy regulation of feed rate (CFN) Easy regulation of feed rate •Variable spray angle High life time (25 years) Two Fluid or pneumatic Nozzles •Easy to operate and control •Cheap for small plants (Power consumption) •Small particles •Variable placement •Variable number of nozzle characteristics Atomizers (a) HCA-400 Centrifugal Atomizer for large feed rates (b) HP Nozzle Atomizer optimized for high quality of agglomerated milk powder (a) (b) Airdistributor for both nozzle- and centrifugal atomizer • Simpel to change between the atomizers • Keep the same air distribution 279 Nozzle Atomizer Air Distributor with Centrifugal Atomizer Fines Atomizer Wheel K64 KØ - 20 - Produc t Motor Air distributor Centrifugal Atomization Air distributor Insert Cone Wheel Mist of Droplets 271 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 96 150 125 100 31.500 25.000 CC-160 4.0 430 550 112 100 18.000 16.000 CE-250 30.0 3.270 5.110 125 100 12.500 10.000 CF-250 55 6.000 9.370 125 100 12.500 10.000 CC-400 150 13.000 25.500 140 100 8.800 6.400 CD-400 396 32.400 67.490 140 100 8.800 6.400 HCA-400 560 48.700 95.440 140 100 8.800 6.400 Centrifugal Atomizer CF-250 • Easy to maintain • Medium capacity • Most used Atomizer K64 KØ - 25 - Centrifugal Atomizer CF-250 • • • Sterile Air Steam injection EX proof edition HCA-400 Centrifugal Atomizer •High capacity • Especially used for smoke purification by desulphorization 92 CF-250 •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) Silicium carbide tiles Silicium carbide nozzles Spindle Cover nut Tightening Ring 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 Hvad nu ? Fremvisning af forstøveren [...]... 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 Hvad nu ? Fremvisning af forst veren ... regulated by the amount of nozzles − Nozzles: 3 to 8 • Every rod is equipped with cooling jackets • The nozzle rods can be taken out for cleaning during the production 271 Nozzle Atomizer HP and HPV • Cannot be replaced with a centrifugal atomizer • The capacity is regulated by the amount of nozzles − Ring Nozzles: 2 to 24 − Center nozzles: 1 to 4 • Every rod is equipped with cooling jackets • The nozzle