Microwave Drying Device
Microwave Drying Device
(OP)
I've been asked to develop a microwave drying device that is rolled over a large surface of material. Is this feaseable or will stray microwaves cause problems?
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
Microwave Drying Device
|
Microwave Drying DeviceMicrowave Drying Device(OP)
I've been asked to develop a microwave drying device that is rolled over a large surface of material. Is this feaseable or will stray microwaves cause problems?
Red Flag SubmittedThank you for helping keep Eng-Tips Forums free from inappropriate posts. Reply To This ThreadPosting in the Eng-Tips forums is a member-only feature.Click Here to join Eng-Tips and talk with other members! |
ResourcesWhat is rapid injection molding? For engineers working with tight product design timelines, rapid injection molding can be a critical tool for prototyping and testing functional models. Download Now
The world has changed considerably since the 1980s, when CAD first started displacing drafting tables. Download Now
Prototyping has always been a critical part of product development. Download Now
As the cloud is increasingly adopted for product development, questions remain as to just how cloud software tools compare to on-premise solutions. Download Now
|
RE: Microwave Drying Device
This article shows them keeping a distance of about 6 meters from the device which rides over the ground at about 10 cm.
I remember this article because it made me laugh and think of a recent episode of the show "Myth Busters" where they tried to wire several magnetrons together to get more power. I just hope no teenagers come across this article. I remember the crazy things I tried when I was that age!
RE: Microwave Drying Device
RE: Microwave Drying Device
RE: Microwave Drying Device
Don't know if he ever got anywhere with it.
RE: Microwave Drying Device
RE: Microwave Drying Device
RE: Microwave Drying Device
I've also seen Microwave termite exterminators in my area (Santa Barbara). I believe he uses 2 microwave oven sources and has two waveguide horns that he places against the wood to overheat those pesky termites.
You will have FCC problems if you don't contain the RF. Also, any operator getting a headache can sue you for illegal emissions. If you can put your material inside a metal box similar to the paper drying mechanism, that would help alot. Use a microwave oven (taken apart) as a source, attach it to the box. Microwave ovens come with probes that could couple into the box easily.
kch
RE: Microwave Drying Device
RE: Microwave Drying Device
I read the article, that must have huge leakage when used in the photo showing the guy controlling the unit. I don't suggest doing similar unless you make your own sealed RF chamber.
I suggest something like using a microwave oven, most have rf coming out of the side wall vertically polarized. Cut a thin vertical slit in the wall opposite the source power. Have the paper feed thru this slit into the oven Have it wrap around a vertically oriented low loss dielectric tube (you'd have to install that), then back out the same slit opening. The RF will dry it as it moves towards and away from the source. To reduce leakage out this slit (from crosspole energy), add an extension to the slit (essentially a piece of flat waveguide, say 5-20 inches long (the longer the better for leakage suppression), as wide as your vertical slit, and narrow enough to fit some Magnetically resonant absorber inside and have the paper come thru.
I've done a similar thing winside a microwave oven whereby I had a waveguide to coax transition inside sitting atop a water filled tupperware. A coax attached to the waveguide transtion funnelled rf out the modified door (I added a bulkhead N-f to N-f adapter to the door to get the rf out). We didn't have any arcing problems and now had a cheap variable power RF source.
kch