PRETREATMENT FOR VAPOR COMPRESSION STILL
PRETREATMENT FOR VAPOR COMPRESSION STILL
(OP)
I 'M A SYSTEM ENGINEER WORKING WITH A BIOPHAM COMPANY.
OUR WATER TREATMENT SYSTEM IS UNDER CONSTRUCTION LIKE BELOW;
CITY WATER(QUITE QOOD)--> SOFTENER(DUAL) --> STORAGE TANK
---> AC FILTER(DUAL) ---> VAPOR COMPRESSION STILL(ACUACAM)
----> HWFI STORAGE TANK
I BELIEVE IT IS A GOOD IDEA TO PUT A DEPTH FILTER RIGHT AFTER AC FITLER TO BLOCK SOLIDS EVEN THOUGH I KNOW THAT THE WATER QUALITY IS GOOD AND SOLIDS DO NOT HAVE MUCH EFFECT ON VCS. BUT SOME OF MY COWORKERS & STILL VENDOR SAY THAT AC FITER AND SOFTENER ARE JUST ENOUGH FOR PRETREATMENT AS THE WATER QUALITY IS GOOD.
WHAT WOULD BE BETTER IN THE LONG RUN? PLEASE HELP ME WITH THIS. THANK YOU.
JOHN
OUR WATER TREATMENT SYSTEM IS UNDER CONSTRUCTION LIKE BELOW;
CITY WATER(QUITE QOOD)--> SOFTENER(DUAL) --> STORAGE TANK
---> AC FILTER(DUAL) ---> VAPOR COMPRESSION STILL(ACUACAM)
----> HWFI STORAGE TANK
I BELIEVE IT IS A GOOD IDEA TO PUT A DEPTH FILTER RIGHT AFTER AC FITLER TO BLOCK SOLIDS EVEN THOUGH I KNOW THAT THE WATER QUALITY IS GOOD AND SOLIDS DO NOT HAVE MUCH EFFECT ON VCS. BUT SOME OF MY COWORKERS & STILL VENDOR SAY THAT AC FITER AND SOFTENER ARE JUST ENOUGH FOR PRETREATMENT AS THE WATER QUALITY IS GOOD.
WHAT WOULD BE BETTER IN THE LONG RUN? PLEASE HELP ME WITH THIS. THANK YOU.
JOHN





RE: PRETREATMENT FOR VAPOR COMPRESSION STILL
In that case you should take care about the ACF. I think the reason for placing ACF after softner is to take care of residual chlorine. If your ACF is not working properly (if pores get clogged) you will face corrosion problems with your MCDS. The recent trend is to use SMBS dosing instead of ACF as ACF is a breeding ground for living organism and it is a head ache to steam the ACF periodically.
Try to maintain water conductivity below 5 microsiemen/cm before MCDS otherwise it is difficult to get good quality of WFI.
Regards,
RE: PRETREATMENT FOR VAPOR COMPRESSION STILL
You should ask the vendor what the purpose of the ACF is. If it is to filter particulate then I would suggest a Depth Filter instead of the ACF. If it is to filter organics then its location after the storage tank is okay.
Gary Schreiber, CWS VI
The Purolite Co.
RE: PRETREATMENT FOR VAPOR COMPRESSION STILL
Regards,
RE: PRETREATMENT FOR VAPOR COMPRESSION STILL
For your reference, it is not a MES( multi effect still), but vepor compression still made by Acuachem in US.
My concern is whether we need a prefilter(5micron) in between ACF & the storage tank when the water quality is good. I am aware that there are pros and cons where to locate AFC & softener.
Please advise.
Another question for Quark, what are MCDS & SMBS short for?
Please let me know.
Thank you for your kind help.
John
RE: PRETREATMENT FOR VAPOR COMPRESSION STILL
MCDS - Multi Column Distillation Still
SMBS - Sodium Meta BiSulphite
If your storage tank is not of SS then your softner should be after storage tank.
For other things I will agree with Gary.
Regards,