Clean It Up
UK Window Cleaning Forum => Window Cleaning Forum => Topic started by: Don Kee on April 05, 2013, 07:05:28 pm
-
Hi all
I have a 10'' d.i cannister and the resin never seems to last that long.
Water TDS going in is around 9/10 and i produce around 2ibcs full a week, how long do you reckon it should stay at 0 for....?
Cheers
-
Depends on how much water you are making per week. maybe you should get a bigger resin vessel. My ro gets it down to about 10/11 but I have the size of resin vessel that takes half a bag of resin. Lasts me about 7/8 months. Hope It helps.
Chez
-
Depends on how much water you are making per week. maybe you should get a bigger resin vessel. My ro gets it down to about 10/11 but I have the size of resin vessel that takes half a bag of resin. Lasts me about 7/8 months. Hope It helps.
Chez
Yeah i think your right with the getting a bigger d.i vessel.
Just wondered how often people changed there resin with the smaller cannisters.
Produce around 1500 litres a week, its not a problem changing it, just gets irritating when doing it every couple of weeks!!!
Bigger vessel it is me thinks!!
-
I used to change resin every few weeks when the reading got to about 010, but since I started using a booster pump I haven't had to change it for about 6 months and it's still on only about 003. So i'd definitely recommend a booster if you want to save on resin.
-
I hate changing the resin - pain the the neck! So every 7 months suits me. How long does a bag last you, how many fills from a bag do you get?
-
all depends who much water you produce 1000's of litres a week not long. 100's a week a good while.
-
dont know how often i cgange resin.
but change resin about every 4-6months ;D ;D ;D
-
I have a 11 litre D.I. vessel and have only changed the resin once in the last
4 years.
006 in tank. Use between 1000 and 1500 litres a week.
-
dont know how often i cgange resin.
but change resin about every 4-6months ;D ;D ;D
i cgange resin once a year ;D ;D ;D
-
I live in a soft water area not checked tap water tds lately but it is usually about 45-75 ppm but i have changed resin in my 11 ltr DI for the fourth time 5 months might have to get a double DI on the go .
It all depends on flow rate as well i produce approx 1500 ltrs a week so a 25l bag of Tulsion resin is going to last me about 7 months thought it would have lasted longer. Mike
-
Get a second vessel.
-
Get a second vessel.
+1
-
Should it be the same size or smaller . Mike
-
http://www.gardinerpolesystems.co.uk/Resin%20Calculator.htm
-
Should it be the same size or smaller . Mike
I have a small 11 inch vessel after a large vessel. I just change the resin in he small one when it creeps up until the resin gets useless in the large one.
-
Thanks mate will buy one off similar size ie the cheapest ;D ;D . Mike
-
The second vessel can be any size but it'll make your change frequency a bit odd.
For those who don't know, method is to put two vessels in series, so water goes through vessel A then output from that into vessel B then output to IBC/van/whatever.
When you first buy the additional vessel, fill it and it goes in as vessel B.
The day the TDS out goes above zero, disconnect both. Move vessel B to be the new vessel A, empty the old vessel A and refill, then put it into position B.
The saving in resin is noticeable immediately.
Note that if you let TDS drift up you won't save a single penny by letting it increase; this setup means that you might as well change it at 001.
Vin
-
Thanks for that Vin do check the tds of water passing through both vessels or do check water produced through each vessel individually at different intervals . Mike
-
Just the end product.
-
Just the end product.
+1 if you're talking about checking the resin to see if it needs replacing that's bang on. Only the output matters.
I do check water going into the resin for another reason - so that I can quickly see if anything is going wrong with the RO membrane. I have an in-line meter that shows water in and out of the RO itself. Over time, I now know what output to expect from a given input. If it ever drifts up, I'll know something is wrong with the membrane. I have the numbers written on the side of the 4040 housing. So, for example, I know that for an input TDS of 285 to 315 I should get an output of 7. Below that 6, while input of 315 - 365 should give 8. Sounds a bit like overkill but I went through a series of membranes last year and at £200 odd each, I take it seriously. As soon as it changes, I'll be looking for the cause.
Vin
-
Vin I am using DI only I have git an Ro which was trouble free for over 4yrs but switched to di only when moved house.
Cant justify chucking 300 litres of waste water down the drain and will be getting a water metre installed soon to reduce my water bill as will save about £15:00 a month and I can put my water usage down as a business expense . Mike
-
i change my resin about every 5 months at the moment.DI ONLY.
i have a 25L DI.when the tds rises to say 010 i put a second smaller vessel in front of the old one and use until the first vessel tds reaches my tap tds.
double DI certainly gets the most out of the resin.
i use on average 2 and half 25kg bags a year so around £200 a year resin costs.
-
Thanks for that Dazmond that is a lot of resin but if i remember you fill your van tank pretty fast through your DI .
I fill my tank 300 ltr static tank in about 4-5 hrs i am hoping only to use 1 1/2 bags max or better still 1 bag . Mike
-
Thanks for that Vin do check the tds of water passing through both vessels or do check water produced through each vessel individually at different intervals . Mike
Hi
M&M see this http://www.cleanitup.co.uk/smf/index.php?topic=168349.0
I think you do need to check the output of BOTH vessels. The TDS out can be higher than the TDS going in which surprised me!!!!!
If you're putting water at say 100 through the first vessel and the TDS climbs up to over 100 which it can do - then the way I see it is - you are not using the resin efficiently - you are in fact making the water dirtier than it is!
g.
-
Thanks Granny already seen i will check both twice a week as i have discovered lately the TDS can creep up pretty fast i can be producing pure water then in the space of a few days the tds will way over what i should be using .
I am not in the habit of checking often enough as only been DI only for about 5 months . Mike
-
I used to change resin every few weeks when the reading got to about 010, but since I started using a booster pump I haven't had to change it for about 6 months and it's still on only about 003. So i'd definitely recommend a booster if you want to save on resin.
how do you attach a booster pump mate , where and how and where are they available
-
Hope this sounds an ok question but if two di units can make the resin last longer then is three or even four better for the life of bloody expensive resin , I already use a 11 litre one which I got from e bay for 20 odd kwid which is far better than the one I bought from WCW which was 90 kwid , if using a few vessels was better then I would defo invest in another two , please reply lads , cheers Ted
-
Think you'll find the answer is - you will reach the "Point of diminishing returns."
You will be putting more effort into buying, checking, re-filling and swapping 3 or more vessels around than you will spend on resin.
G.
-
when you first use a DI vessel YOU JUST USE ONE VESSEL until the tds rises say to 010.then you put a fresh resin vessel IN FRONT OF THE FIRST ONE then when the first one rises to the level of your tap tds you throw it away and continue using the second one AS A SINGLE VESSEL until that rises to 010 then put a fresh one in front of it and so it goes on and on and on........!!! ;D ;D ;D
there is no benefit of using any more than 2 vessels at anyone time!!just use bigger vessels if you want it to last longer between changes!! ;)
hope this helps!!