Heater Installation and modifications

[Anshul143]

Dear All,
I have a water supply at say 70 deg Celsius in line 1, and another line 2 supplying make-up water at 45 deg Celsius. These two are feed into a common tank. I have a heater(1) installed to raise the outlet temperature to say 78 deg Celsius. I have a problem of scaling of heater due to water from supply line 2 consists of carbonates. My aim is to reduce downtime because of heater-1 choking and decreasing load on heater 1. Is this feasible: Applying another additional heater at line 2 before common tank.
Also suggest ways to reduce heaters scaling, best anti-scaling agent,and any ways apart from anti-scaling agents?

 

[StoneCold]

What about just heating line 1 up to a temperature so that once blended the two streams combine to 78 C and avoid directly heating the stream with carbonates. Or if the mass balance does not work out that way, Add as much heat as you can to stream 1 and a minimal amount to stream 2. Maybe you could switch from electric heat to direct steam injection to heat the streams?

Regards
StoneCold

 

[moltenmetal]

Direct steam injection- get rid of the hot surfaces. Or get rid of the carbonate, and the sulphate, or more practically the calcium and magnesium. Or you can always try the magical magnets...(grin)