RO Water use in Boilers
RO Water use in Boilers
(OP)
Hello,
I'm José Isita, an engineer from Mexico. In the plant we have 2 RO Units, the first unit produces permeated water that we use in our product, and the second, treat the reject from the first unit for reusing it in other areas of the plant.
Since this water is softened and has lower conductivity, silica and minerals than our well water. I want to use it in the boilers of the plant. So I want to know if somebody has done that? And is you think that I will have savings on water, chemicals and diesel?
Here is some info about the situation:
Boiler Operating Pressure: 106 PSI
Steam Production: 10,000,000 lb/month
Well Water RO Water
Conductivity 850 400
Silica 80 50
Hardness 240 0
I'm José Isita, an engineer from Mexico. In the plant we have 2 RO Units, the first unit produces permeated water that we use in our product, and the second, treat the reject from the first unit for reusing it in other areas of the plant.
Since this water is softened and has lower conductivity, silica and minerals than our well water. I want to use it in the boilers of the plant. So I want to know if somebody has done that? And is you think that I will have savings on water, chemicals and diesel?
Here is some info about the situation:
Boiler Operating Pressure: 106 PSI
Steam Production: 10,000,000 lb/month
Well Water RO Water
Conductivity 850 400
Silica 80 50
Hardness 240 0





RE: RO Water use in Boilers
RE: RO Water use in Boilers
= = = = = = = = = = = = = = = = = = = =
Corrosion never sleeps, but it can be managed.
http://www.trenttube.com/Trent/tech_form.htm
RE: RO Water use in Boilers
EdStainless:
Teh conductivity is so high because the water that enters to the 2nd RO unit, is the reject from the 1st one, so that water has a conductivity of 3000 microsiemens.
The boilers purge when water reaches a conductivity of 3000 microsiemens...
Are there going to be also savings in fuel? Because since water will last longer, I will need to heat less water, I am right?
RE: RO Water use in Boilers
RE: RO Water use in Boilers
TBP:
We have condensates return, but anyways, we are feeding 55 m3/day to our boilers (19,800 m3/yr). We didn't know the amount of blowdown... Can somebody aproximate the amount of blowdown that we could have? We recirculate part of the blowdown to the condensates tank.
According my estimates, sending to the boilers the RO water will allow us to double the concentration cycles, thus reducing the blowdown from 1147 lbs/hr to 842 lbs/hr, and that will gave us savings of 23 m3 of diesel pero year.
This by reducing the blowdown from 8 to 6%
RE: RO Water use in Boilers
RE: RO Water use in Boilers
This explains the value of zero hardness but still high conduvtivity.
This water can be used in a low pressure boiler because it will not have scaling abilities, however you should check the pH and chloride contents for the materials suitability of piping and the boiler..