Process Dryers                     Image Credit: Glenro Inc. | Labconco Corporation | Wyssmont Process dryers are used to remove liquids or moisture from bulk solids, powders, parts, continuous sheets or other liquids by evaporation or sublimation. Dryers can be broken up into two main types: direct and indirect. Direct dryers convectively heat a product through direct contact with heated air, gas...
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Q & A on Process Dryers

We asked our users for their input on Process Dryers. Here are the results of 130 users familiar with Process Dryers.

Who Took Our Poll? | Design Trends | Applications and Use | Features | Buying Advice

Who Took Our Poll?Top

Design TrendsTop

Q:
What new technologies are influencing process dryer design?
19 answers
Answers:
The fluid bed dryer combined with spray dryer (developed from Damrow), is the technology that in my opinion could help to dry most of the materials to be dried in the food technology.
~Alfonso R, Engineer, Guadalajara, Mexico
They should be influenced by the amount of Energy they use, and not giving use their quality nor their ability to dry product or sludge.
~Engineering, Consulting, Charleston, WV
Plan to experiment with hot air drying (rotary) for a -325 mesh copper powder. Currently only used double cone dryers at our facility.
~Jim, Project Manager, Johnstown, PA
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Q:
From your perspective, which companies are creating the most innovative process dryers?
18 answers
Answers:
It depends on the process, most companies have specific experiences in particular process, always exist something new
~Jose Manuel MENDOZA, I am very interested om new systema and aplications, Executive Technical, Mexico
I forget the name of the company but it is one company that makes dryers with plasma for making flash calciner
~EDUARDO S, Process/plant/maintenace/developement engineer, ESPOSENDE, PORTUGAL
China is competing with all applications with better pricing and process guarantee
~Ramachandra K, Technical Support, Dubai, Dubai and India
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Applications and UseTop

Q:
What are some of the applications you have used process dryers for?
31 answers
Answers:
Spray drying Milk, whey, maltodextrin & glucose. Drying edible cooked beans, soil fertilizer, corn, wheat & milo flakes, pet food in counter flow dryers. Corn hulls, coconut fiber for hydroponia in drum dryers. Starch in flash drier. Starch in steamed drum drier.
~Alfonso R, Engineer, Guadalajara, Mexico
Flotation dryers for double sided printing applications. Pin ovens and conveyor ovens for two piece can applications. Arch dryers for web applications, etc.etc.etc.
~Tom Piskor, Technical Advisor, Green Bay, WI
Vacuum drying and impregnating of transformers. The transformer insulation is composed mainly of cellulose materials like paper, pressboard, wood.
~Walenty K, Process Engineer, Lodz, Poland
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Q:
Please share with us any “non-standard” applications that process dryers have been used for.
11 answers
Answers:
Back side of a suction pump where process off gas retrieval condensates and adds hydrocarbons to the stream, where the ppm impurity range is important.
~Marketing/Sales, HANOVER PK., IL
I do not know, if you are drying a product it's because you need it for the process.
~Jose Manuel MENDOZA, I am very interested om new systema and aplications, Executive Technical, Mexico
Foamate drying is fast & maintains all functional values of bio-active products.
~Tengiz Jaliashvili, Research & Development, Les Etilleux, France
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Q:
Do you know of any disastrous mistakes that occurred due to the incorrect usage of a process dryer?
10 answers
Answers:
Not a big mistake but I saw the way the company I worked for could have dried their product. It is that the engineers do not know better. They know books but they do not know nature. With the product wet & on a hot surface they were getting STEAM HYDROPLANING. This caused scallops and poor drying. I suggest that they turn off the first four '4' dryer rolls to remove some of the moisture before having the product on hot and then step up the heat as the product drys so it stays ON the rolls instead of floating on steam. Then by designing the dryer so it can pull a vacuum they could have reduced drying time and co$t. Why do you think it is DRY at 40,000 feet?
~Dis Vet Rex Romaine BA, 76 Retired, X-DuPont, X-Air Force, X-Farmer KID, Poortland, U.S.ALIENS
Flotation dryer that would support the web but disturbed the coating such that it created an air dam. Dryer too short thus restricting production speeds.
~Tom Piskor, Technical Advisor, Green Bay, WI
Attempted the use of 2 different mechanical mixing dryers. Both locked up the stirring mechanisms, and had to be manually dug out.
~Jim, Project Manager, Johnstown, PA
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FeaturesTop

Q:
What would your design or feature "wish list" be for this product?
15 answers
Answers:
The dryer receives the product that is actually specified to be provided. IE, if wood, it is at the specified grind or if DDG, the correct moisture is delivered. If Wheat DDG, the wheat purchaser has procured the correct type and they have not blended the syrup excessively making the gluten super sticky.
~Ken S, Engineer, Camden Point, MO
To be able to control the heat to specific temperatures to limit agglomeration and oxidation.
~Jim, Project Manager, Johnstown, PA
Pre preventive poisoning and extending the life by use of molecular sieve solutions
~Marketing/Sales, HANOVER PK., IL
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Q:
Is there any advice you want to share with users to help them avoid common errors in selection or usage of process dryers?
14 answers
Answers:
Do not look at HEAT alone as the way to go. There are a lot of ways to dry things. The process depends on the product, the speed you want it dried and the co$t. Look around as to how people dried things were dried a hundred '100' years ago and how people dry things on the cheap nowadays.
~Dis Vet Rex Romaine BA, 76 Retired, X-DuPont, X-Air Force, X-Farmer KID, Poortland, U.S.ALIENS
Select the dryer technology which suits your process(dryness factor, time quality of the end product and waste) rather going for saving a little bit initial investment and losing continuously in production. Please refer environmental limitations while selecting the technology.
~Ramachandra K, Technical Support, Dubai, Dubai and India
If possible get the supplier of the coating, ink or what ever you're applying to your product to work with dryer manufacturers for best dryer sizing.
~Tom Piskor, Technical Advisor, Green Bay, WI
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Buying AdviceTop

Q:
Do you have any advice for people relative to buying or using process dryers?
12 answers
Answers:
If it's a new product find companies that have lab facilities that can simulate your application. If it sounds too good to be true, it probably isn't true in dryer time or cure required.
~Tom Piskor, Technical Advisor, Green Bay, WI
Make the deal based on process guarantee based set parameters of your plant out put or process.
~Ramachandra K, Technical Support, Dubai, Dubai and India
Stay away from mechanical mixing dryers. Too difficult to clean and move high density powders.
~Jim, Project Manager, Johnstown, PA
Consider what result you need, double it, review all the process costs
~Marketing/Sales, HANOVER PK., IL
Look for different methods that use energy sparingly
~Dis Vet Rex Romaine BA, 76 Retired, X-DuPont, X-Air Force, X-Farmer KID, Poortland, U.S.ALIENS
Know exactly what you want to achieve in 5 years time
~Steve B, Design Engineer, Auckland, New Zealand
Compare and visit installations that are working
~Jose Manuel MENDOZA, I am very interested om new systema and aplications, Executive Technical, Mexico
Just contact with professionals
~Alfonso R, Engineer, Guadalajara, Mexico
Look at the GMP of drying
~Harald H, Process engineer, Leeuwarden, Netherlands
Yes, it depend on their needs
~Victoriano ocon O, Purchasing, Lapulapu city cebu, Philppines
Get a reputable supplier
~Ken S, Engineer, Camden Point, MO
Quality
~William Kuo, Engineer, Taipei, Taiwan, R.O.C


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