Re: Analysis Of Fluidization Capacity
I have some old references to a device created by Jenike and Johanson Inc. which measures the permeability, though I dont think it is entirely comparable to your device.
There may be others.
Regards,
Lyle ■
Re: Analysis Of Fluidization Capacity
What is fluidization?
Is it a state, where captured gas, between fine particles, allows particle movement or flow to occur within the particle bed below its natural surcharge angle or internal friction angle?
As long as the gas is captured, the tendency to flow goes unabated. Is there a retention time for particle suspension which makes a part of fluidization? How does it differ from liquifaction?
How would this volume increase unless it is by increasing the captured gas content within the particle bed?
Does a bucket of marbles released through a container opening constitute fluidization? ■
Re: Analysis Of Fluidization Capacity
Originally posted by nordell
What is fluidization?
Thanks for all of your inputs!
I am not an expert to give an answer to this. My opinion is though that this has nothing to do with a particel bed, gas or air. Fluidization is rather a condition where particles obtain characteristics of a fluid. Like a snow avelanche driven down the mountain side running like a river. When it settles after the avelanche, you can hardly move it (tapped density). I believe I can measure the particles ability to fluidise in my device, as well as the particles ability to segregate and the energy input for these operations. I believe these are important properties to analyse in order to know how the material behaves in transport and storage with reference to segregation, flowability, arching etc.
I believe the company Jenike & Johansen would be the right company to ask my questions to. I have read some of their articles very thoroughly.
Any other inputs are welcome. ■
Re: Analysis Of Fluidization Capacity
Good Day
There is no doubt in my mind that when we talk about the field of solids processing and solids handling, one of the most important material characteristics I look at is the ability to fluidize, the affect of fluidization and the ability to retain fluidization.
Those parameters come into play in the design and selection of storage bins, conveying systems, equipment which is sized on a volumetric displacement principle, etc, etc.
Typically, the tests which are conducted are done so using some form of container which has a known volume of material and by applying varying amounts of fluidizing air flow, the results are recorded. Material levels are measured as the product expands and time it recorded with stop watches.
Most equipment vendors have their own proprirtary test set up ranging from very informal to more complex. The information they develop becomes part of their own material database and is used for their own design practices.
I am not personally aware of a STANDARD such as an ASTM or a DIN procedure which vendors would follow.
I would like to see the details of your invention and would be happy to offer more comments at that time.
Remember, what you are competing aganst are some pretty rudimentary set-ups which vendors have developed over the years and give "meaningful" results, at least in their own minds.
Regards ■
Re: Analysis Of Fluidization Capacity
Originally posted by jack hilbert
.....the ability to fluidize, the affect of fluidization and the ability to retain fluidization.
Hello Jack,
I can see that you are an expert on this.
My device fluidizes the patriculate material mechanically. One measures the total volume increase as well as how quickly the material increases in volume (dm3/sec), therefore "fluidization capacity".
One can also measure how much energy is required to increase the volume and the ability to retain fluidised. In other words, I believe the device will indicate potential capacities for conveying, both in pneumatic and mechanical conveying equipment.
I would like to send you some detailed technical information if you are willing to sign a secrecy agreement. The device is patent pending. ■
Re: Analysis Of Fluidization Capacity
I have no problem with a secrecy agreement but I suggest you please start using my e-mail address as shown below as we are now getting into a discussion which should be OUTSIDE that of this forum.
pcchilbert@entermail.net
Regards ■
Analysis of fluidization capacity
Hi,
Through 6 years of R&D, I have patented a device intended for other things than an analyser. But - the device can measure what I call fluidization capacity or in other words, the volume increase of a particulate material. I believe this measurment is the opposite to tapped density (Hausner Ratio).
It can measure the volume increase per time unit or the volume increase relative to normal density conditions.
Would such an analyser be of use to anyone? Is there a market for such an analyser? Are there such analysers on the market already? ■