Tørring i overhedet damp

Peder Fosbøl

Oktober 2008

Denmark

Norway

GermanyUSA

Peru

Office LocationsOffice Locations

Spain

Production FacilityProduction Facility

35.000 m35.000 m²² production facilityproduction facilityLocated in Located in HaarslevHaarslev, , FunenFunen -- DKDKPrePre--assembly facilitiesassembly facilitiesService setupService setup

through:through:▲Thermal Drying▲Evaporation▲Mechanical Separation

........””for a profitable and sustainable businessfor a profitable and sustainable business””

Our Objective:Our Objective:

Main Business Areas:Main Business Areas:

▲▲ Rendering, Animal ByRendering, Animal By--ProductsProducts

▲▲ Industrial Fish and Fish ByIndustrial Fish and Fish By--ProductsProducts

▲▲ Distillers and Brewers ByDistillers and Brewers By--ProductsProducts

▲▲ BioBio--Fuel, BioFuel, Bio--MassMass

▲▲ Municipal and Industrial SludgeMunicipal and Industrial Sludge

Type RCD Type TSH

Type TST Type TSC

Disc Drier – Rotor types

Tube Driers

Vacuum Disc Driers

Comparison of air driers

Drum Drier

Hot Air Drier

Dyno-JeT Hot Air Drier

Oil Consumption46,3 kg/ton fish

Oil Consumption33,3 kg/ton fish

Evaporators

Superheated steam drierEnergy ultilization

Comparison Superheated steam drier and Hot air drier

Drier/Evaporator influence on quality of fish meal

Drier Energy for Evaporator

Energy consumption

Mink digestibility, % Evaporation temperature °C

Steam drier Atm. Waste Heat Low 85-90 ~100

Vacuum Disc drier Waste Heat Very Low 90-92 ~70

Hot air drier, drum Steam or MVR High 90-93

60-65

Superheated steam, drum Waste Heat Low 85-90 ~100 Steam drier+Hot air drier 75-80 %, TS split

Waste Heat Low 88-90 ~100/~65

Steam drier+Hot air drier 60-65 % TS split

Waste Heat Steam or MVR

Medium 90-93

~100/~65

Steam drier+Flash drier, superheated steam 60-65 % TS split

Waste Heat Medium 90-92 ~100

Flash Drier, Air Steam or MVR High 92-96 60-65

DynoFlash DrierTemperature profile

0

100

200

300

400

500

0 1 2 3 4Drying time, min

Hot

air

tem

pera

ture

Hot air temperature Material temperature

V

Drier/Evaporator energy consumptionDrier Energy consumption

Drier. kg fuel/kg evaporated

Energy for Evaporator

Energy consumption Evaporator kg fuel/kg evaporated Wh/kg evaporated

Total fuel consumption kg/h

Steam drier Atm. 0,090 Waste Heat 0 990

Vacuum Disc drier 0,087 Waste Heat 0 960

Hot air drier, drum 0,087 Steam MVR

0,030 kg/kg 30 Wh/kg

1500

Superheated steam, drum 0,094 Waste Heat 0 1035 Steam drier+Hot air drier 75-80 %, TS split

0,090 Waste Heat 0 990

Steam drier+Hot air drier 60-65 % TS split

0,089 Waste Heat Steam or MVR

0,030 kg/kg 30 Wh/kg

1080

Steam drier+Flash drier, superheated steam 60-65 % TS split

0,092 Waste Heat 0 1010

Flash Drier, Air 0,087 Steam

MVR 0,030 kg/kg 30 Wh/kg

1500

Superheated Steam DryingWaste Heat utilization in evaporator and/or coagulator

Superheated steam drying contra Hot air dryingRetention time>~5 min

Protein containing products

Advantages• Energy consumption reduced (30-40%)• Dust exploision risk reduced• Feed safety increasedDisadvantages• Protein Quality reduced

Superheated steam dryingRetention time<~5 min contra retention time>~15 min

Protein containing products

Advantages• Increased protein quality

Disadvantages• Particle size reduction

Superheated steam drier. Termo oxidixer

Comparison Superheated steam drier and Hot air drier

Why Superheated steam drying?

• Convective driers can be designed for hot air drying and/or superheated steamdrying. Drying mode depending on rawmaterial.

• Existing Air driers can be modified to bothdrying modes

• A superheated steam drier may beoperated as a termo oxidizer. All waterevaporated (no condensate)

Hot Air Drying or Superheated Steam DryingSelect the operation which is most convenient