Hacksaw,
I think I confused you: I'm not talking about direct steam in the Dryer Section....I'm talking prePress Section over the flatboxes. I bet this makes a lot more sense, right? Help me if you can Hacksaw!
SASC
Buckrub231,
No one has been able to help you? I have a bead on this problem. What is the vacuum source? How much volume are you talking about? What vacuum level? What is the piping made of in this application. Is the gas saturated? Write back!
SASC
Quark,
I'll send you an Excel drawing. It really is not a "dryer" because no evaporation is taking place....not a "dyer" in the conventional sense at all. Thanks for your help!
SASC
Quark,
The problem is a real "bugger" that I can't shake off. Thanks for the life-line, I need some help....The product is actually pulp. The steam is simply saturated steam that would otherwise be vented, but we are using the BTUs here. What else do you think you need? I've...
Quark,
Thanks for your input! Its hard to describe the problem, but I'm trying. What other details would you like/need to know? Remember, this is a wet-laid process. There is no relationship between the moisture holding capacity of the cellulose at various temperatures at temperatures below...
Hello All,
Process Description:
I have a problem with a system where a moist, but porous, continuously fed "web" of cellulose, at a consistent/steady basis weight, is transported on a porous industrial belt through a process that is designed to engage the drying of the cellulose...
Just read this post, and ANOTHEROLDGUY's response, which has led me to a question: What exactly are the problems in using flat-sided vacuum pumps?.......these pumps are confounding me....also, What are the overall advantages of conical ported pumps as compared to flatsided designs? Do you have...
Chemtiger,
I think you are on target.........if there is a trend toward dry vacuum pumps out there, it is a trend to disaster, short and long term. Dry vacuum will not rplace liquid ring....maintenance will have the last word on that one for sure! If vapors are scooting by into the vacuum...
Berko & Bimr,
Have you looked at multi-stage centrifugal blowers? If not, why not? They seem to hold court in the major aeration/diffuser set-up in the industry today.
Regards,
SASC
Scipio,
A progressing cavity pump just might be the ticket! Not that familiar with this pump type in actual operations myself, but how do they stack-up versus centrifugals insofar as out of the box price, operational costs, general maintenance, and capacity(which we all have forgotten to...
I originally listed this question in Water/Waste Water with no responses....maybe the forum should have been here to start with:
Please help me with particular questions concerning waste water/sewage treatment with aeration utilizing multi-stage centrifugal exhausters as the source of air flow...
Kawartha & Quark,
A absolute means of combating entrained air content is the sole purpose of what I proposed here with the vacuum pump, not level development or ensuring a flooded intake to a centrifugal pump...thats not at all what I've suggested. O.K., maybe I've adulterated the...
Quark,
1) Yes, the tank must be configured to have the overflow act as an internal weir....with the vacuum pump positioned at a point some distance above this weir. In other words the vacuum will provide an head, but free flow of water at the overflow will not be disrupted as the overflow is...
Ponderer,
Have you guys thought about augmenting a small vacuum source, capable of high-end vacuum, to the peak of the tank? If the air content is relatively small, this vacuum pump can be very small, but fully capable of evacuating all entrained and peripheral free air in the atmosphere prior...
