Scaling without calcium?
Scaling without calcium?
(OP)
Hi, im writing from venezuela.
I need to know how is posibble that im having scaling in my evaporative condenser if my water feed is:
TDS: 320 ppm
Total Hardness: <10 ppm
pH: 7.2
bicarbonates: 190 ppm
Silice: 29 ppm.
Temp: 77 F.
i work the condenser at 4 cycles max.:
in the basin have:
TDS: <1300 ppm
Total Hardness: <50 ppm caco3
pH: < 9.1
bicarbonates: <800 ppm caco3
Silice: <120 ppm.
Carbonates: <100 ppm caco3
the residual of ortophosfathes is near to 12 ppm. and the dispersant its near of 24 ppm. (continue dosification) and the critic temperature is near to 95 Fahrenheit.
Thanks.
I need to know how is posibble that im having scaling in my evaporative condenser if my water feed is:
TDS: 320 ppm
Total Hardness: <10 ppm
pH: 7.2
bicarbonates: 190 ppm
Silice: 29 ppm.
Temp: 77 F.
i work the condenser at 4 cycles max.:
in the basin have:
TDS: <1300 ppm
Total Hardness: <50 ppm caco3
pH: < 9.1
bicarbonates: <800 ppm caco3
Silice: <120 ppm.
Carbonates: <100 ppm caco3
the residual of ortophosfathes is near to 12 ppm. and the dispersant its near of 24 ppm. (continue dosification) and the critic temperature is near to 95 Fahrenheit.
Thanks.





RE: Scaling without calcium?
Gary Schreiber, CWS VI
The Purolite Co.
RE: Scaling without calcium?
If you want to avoid scaling, you also have to be address the alkalinity level, which in your case is very high.
Most industrial users use sulfuric acid to control the alkalinity level, keeping the alkalinity below 200 mg/l. Adding acid keeps the pH down by destroying alkalinity.
RE: Scaling without calcium?
First thanks Gary for the wonderful source "Nalco Water", it realy has all the info needed. I agree that keeping the alkalinity level low will solve much of the problem in the future.
Susan
http://www.handiquip.com