1. April 6th, 2010
Munters DH Systems for Bulk Storage / Pneumatic Conveying Presented by: Andrew Cook Segment Manager

2. Humidity and Dewpoint Control
Hygroscopic Material Conveying / Storage
Eliminates Clogging and Sticking
Eliminates Product Waste
Improves Product Consistency
Spray Drying / Instantizing
No clogs in product collectors
Allows smaller fluid beds
Increases throughput of towers
Candy Packaging
Avoids clogged equipment
Reduces cleaning frequency
Allows fast wrapping with polypropylene
Candy Pan Coating
Improves surface finish
Speeds water-based drying
Eliminates picking & sticking
Low-Temperature Drying
Improves product quality
Fast drying at low temperature
Enrobers
Eliminates skirting
Eliminates condensation
Improves sanitation

3. Cooling-Based Dehumidification
Air is circulated across a cold coil and cooled to saturation
Further cooling condenses moisture from the air stream
Dew point reduction is limited by minimum practical coil temperatures
Air is delivered at saturated conditions

4. Psychrometric Plot
Psychometric Plot Of Design Conditions for Below Freezer DP Applications (Cooling Only) 40
140 35
120 30
Enthalpy - Btu per Pound of Dry Air
100 25
PRODUCTION AREA
AT 45-50°F
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb)
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb)
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb)
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb)
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb)
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb)
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb)
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb)
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb)
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb)
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb)
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb)
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb)
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb)
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb)
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb) 80 20 60 15
FROST 40 10
ICE 20
-10
-10 10 20 30 40 50 60 70 80 90
100
110
Dry Bulb Temperature °F

5. Cooling Coil Performance
FROST
FOG
25 °F
19 gr/lb
70°F
56 gr/lb

6. Standard Desiccant Dehumidification
The dehumidifier is based on Munters unique Honeycombe® sorption drying wheel:
Process air passes through the drying wheel and leaves the dehumidifier as dry air
Heated reactivation air collects the moisture absorbed by the drying wheel and leaves the dehumidifier as wet air
Air supplied to area has dewpoint below freezing
Supply air acts as a sponge,

7. Psychrometric Plot Dehumidification with Desiccant Latent Heat of40
140 35
120 30
100
Enthalpy - Btu per Pound of Dry Air 25 80
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb)
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb)
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb)
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb)
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb)
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb)
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb)
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb)
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb)
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb)
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb)
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb)
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb)
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb)
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb)
Humidity Ratio Grains of Moisture per Pound of Dry Air (gr/lb) 20
Latent Heat of
Conversion 60 15 40 10 20
-10
-10 10 20 30 40 50 60 70 80 90
100
110
Dry Bulb Temperature °F
Dehumidify to 5.5 gr/lb.
or Lower

8. Benefits of Dehumidification
Hygroscopic materials don’t stick together
Products flow freely through conveyers and hoppers
Improved product quality with finished product (no clogging)
Eliminates condensation dropping onto product
- hygiene risk
Prevents costly shutdowns, production interruptions and product loss
Return to production quicker
Product clogging often results in downtime.
DH helps dry cleaned equipment.

9. Applications Silo Conveying Mixing and blending
Drying- fluid bed, spray tower
Coating

10. Storage – Silo Prevention of clogging Elimination of condensation
Prevents mold growth
Once through system
Prevents mold growth
Removes condensation
Stops caking
Dry air
Sizing
Typically .5 AC/H for the volume of the silo (once through system)

11. Pneumatic Conveying As air is compressed and the air volume decreases
Mixing Vessel
Silo
Munters Unit
Vacuum Pump
Filter
Valve
As air is compressed and the air volume decreases
The moisture content of the air remains the same, causing the dewpoint to shift and increase
High humidity will be absorbed by product, or can stick to line especially on cold spots.

12. Pneumatic Conveying Sizing
Customer / Designer will know CFM required for conveying.
DP should be known. If not, consult Munters DH handbook for different materials and moisture content.
Post Cooling is typically done outside of the Munters System. Typically, high pressure fans are used for conveying.
Typically, once through systems.

13. Storage Reduces waste in storage Prevents sticking and lumpy material
Prevents mold
Eliminates condensation (ice)
Prolongs shelf-life and quality

14. Storage Solution Perform a moisture load calculation.
Understand at what RH product is in equilibrium.

15. Spray Tower Problems Production rate varies by season
Top
Production rate varies by season
Drying time too long
Inconsistent quality of the powder
Non predictable parameters
Production stops
Product scrap
Lack of flexibility
Wall
Sweep
Static
Bed
Pneumatic
transport
Powder

16. Actual Example of Drying Time Summer vs. Winter
Batch consists of 4 cycles
Summer cycle 110 min.
Winter cycle 90 min.
Prep is down time between cycles
Winter batch 20% faster processing time
Lets look at this problem a little closer-
The Granulation process was run in batches.
Each Batch consisted of 4 drying cycles,
In summer cycles took approx. 110 minutes to complete
In winter cycles took approx. 90 minutes to complete.
Prep time was the down time between batches, you will note on the chart at right that the prep time was a little longer for summer than winter, this was due to inefficiencies as the workers were required to work longer in addition to the rounding of overtime hours worked
When 4 cycles were added together to become a batch and they compared winter to summer they found that winter batches took approximately 8 hours to complete and summer batches took approximately 10 hours.
Chart at right shows Drying,prep, and total for both summer and winter in minutes. notice the substantial drop in batch drying time, cycle time reductions resulted in approx. 16% of the savings in production time add to this the prep savings time and you have a 20% overall savings in production time

17. Spray Dryers, Munters Approach
Using desiccant technology to dry the outside air required for the process.
Use Munters GTR Rotor.
Provide a consistent low dew point (winter time conditions).
Customer will know CFM required (once through systems).
A contrario, si l’air est maintenu à 2 g d’eau par kg d ’air en sortie d ’un déshydrateur il n’y aura dans les mêmes conditions que 200 l d ’eau introduit dans la tour soit 1000 l de moins par heure.
Ce qui signifie qu’en été, dans les conditions citées, c ’est 1 m3 d ’eau qui ne sera plus introduit par heure en plus de la solution liquide. On comprend immédiatement pourquoi l ’air sec permet de maintenir la production constante.
Il est à noter au passage que le déshydrateur augmente également la température ce qui sera source d ’économie d ’énergie.

18. Pharmaceutical Fluidized Bed Drying
Manufacturing process include the drying of product in a fluidized bed
Manufacturer noticed slower production rates in summer vs. winter
-First, lets take a look at the application.
-solid dosage compounds (working with powders in a granulating area)
-The manufacturing process we will be concentrating on is the drying of product in a Fluidized bed Drying system

19. Fluidized Bed Drying Approach
Supply dry air into the fluidized bed.
Delivered DP is typically know based on specific product.
Usually, once through systems.
Too dry can be an issue so humidification and heating may be required during winter months.

20. Pan Coating Issues Length of drying time Soft coatings
Picking (coating sticking imperfections)
Other quality issues.

21. Pan Coating

22. Munters Advantages Better product uniformity Coating becomes harder
Less picking (coating sticking imperfections)
Sugar liquid can be applied faster, increasing capacity without adding pans
Overall hygienic advantages

23. Cooling Tunnel 2 2 1 1 Reactivation Air Inlet Reactivation Air Outlet
Munters 1 1

24. Free Flowing Powders

25. Customer Base Kellogg’s - Cooling Tunnel, Packing
Kraft - Cooling Tunnel
Publix - Hopper Dryer, Drying Freeze
Wrigley - Coating, Drying Tunnel, Packing, Drying Hopper
Masterfoods - Pneumatic Conveying
Hershey - Drying Tunnel, Coating, Mixing
Nestle - Pneumatic Conveying, Coating, Cooling Tunnel
General Mills – Pneumatic Conveying

26. Other Potential Customers
Symrise
Little Lady Foods
Wild Flavors
Caravan Ingredients
Basic American Foods
Continental Mills
Lesaffre Yeast Corporation
Kerry Inc (Yeast)

27. End User Products Candy Bakeries Flavors Fragrances Dehydrate Products
Pharmaceutical
Whey
Starches
Milk
Yeast
Food Coloring
Coffee
Soup

28. New Literature

29. Market Strategy Be first to the customer:
This is not a new application. Bry-Air is heavily into this market (and cheaper).
Understand our competitive advantage:
Long history of working in this industry.
Better product.
PowerPurge
Create specifications around Munters, and make the competition match (energy).
HCD product line has served this industry well. Use ICA when double wall is important to the customer / process.

30. Action Plan
On 5/20/10, potential customer list to be distributed to Sales Force (will include end users for spray dryers and other hygroscopic materials).
By 5/20/10, Webinar Presentation to be posted on line.
By 5/20/10, Representative Copy of presentation to be posted on line.

31. Questions???