High Capacity Water Filter Recommendations please

[awemawson]

I'm always impressed with the breadth of knowledge on this forum, so I'm on the knock again for some advice !

I need to filter water pumped from my newly discovered bore hole (*) to prevent the brazed plate heat exchanger that I will be passing it through clogging up. The water is for cooling, it is NOT for drinking, and once passed through the heat exchanger will be discharged to a local stream. The water is known to have a high iron content.

So - selecting a filter: I need to pass 45 litres a minute minimum - what pressure - I have no idea as I haven't yet got the pump, but 'adequate' !

But it seems VERY hard to get actual figures - sellers refer to 'high flow' rates in some cases but not backed by figures.

Today I've acquired a HUMONGOUS heat exchanger, well overkill for the application, but it would be nice not to block it !

(* turns out the bore hole is 175 foot deep - I started pumping it out and discovered rungs to climb down when I'd lowered the level a few feet !!!)

 

[Kayos]

For a plate to plate its not that big, they are sized at 3 x the boiler capacity when used for system separation.
Do you want to remove the iron from the water or just the big bits?

 

[awemawson]

The iron is not a problem to me unless it clogs things up.

BTW that plate heat exchanger weighs 35 kg and has 54 mm / 2" BSP connections to give you an idea of size, and I need to lose 40 kW through it

 

[Seadog]

BTW that plate heat exchanger weighs 35 kg to give you an idea of size

Fundamental mistake, Andrew. No mug for scale

 

[awemawson]

OK just for you Graham

 

[Seadog]

That took me a while to work out was was going on. It looked like two exchangers. It was only when I noticed the labels you'd stuck on that the reality dawned on me. It is bit on the big side, isn't it?

 

[awemawson]

It IS two heat exchangers Graham - no point in doing things by halves and a spare is always handy

Now - what about water filter recommendations, I can't believe that the forum is going to let me down

 

[thinfourth]

You want the filter to stop it from clogging

Now clogging can come in two ways

No three ways

method 1 = big lumps of snot blocking up passages

method 2 = Fine silt slowly building up and making an insulating layer

method 3 = scale building up and forming an insulating layer


you can solve all 3 with a filter system

BUT

1 is cheap and easy as you just get basically a 1mm or so basket type filter

2 Involves ultra fine back flushing filters which cost HOW MUCH!!

3 Involves a back flushing filter and a chemical treating option and that is HOW MUCH!!!!

So seeing it is intermittent service and you are sucking from what should have not lumps in it i would ask if you even need a filter

As if you get scale or sludge build up you can back flush or chemical clean

 

[Anguz]

https://www.amazonfilters.com/

thats the outfit we use at work on water that needs temporary filtering..we use them on new boreholes
not sure how much but they look expensive...