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Directions |
January 4, 2011 |
| Reviewer:
Chemical Directions
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Per our discussion, for the first 30 days start off with an All In One Chemical, Boiler Chemical 1287.
What you need to order is:
1) A conductivity meter (comes with calibration solution): Item HT-3P
2) A Sulfite Test Kit: Item 8447-5B
3) A Hardness Test Kit: Item 8417-1B
4) A 55 gallon drum of Boiler Chemical 1287: Item BC1287-55
Testing requirements:
Softener: Hardness Test
Boiler Water Sulfite Residual Test, Hardness Test, Conductivity
With this program, I do not care about pH. If you have enough sulfite, the pH will be in balance (around 10). I want to keep this simple. In the real world if you have above 7 pH, your system is fine. In theory you want it above 10. I have seen boilers operate for 30 years with a 7 pH on low pressure boilers.
If you maintain your softener, you should have minimal hardness in the boiler, so we do not need to monitor the polymer or phosphate. If you have enough sulfite, you will have plenty of phosphate and polymer. You only need 8 ppm of phosphate to balance 1 ppm of hardness. So, if you have a good softener and you do hardness checks you will not have a problem. Lets not waste time doing this test.
Now with boiler water testing, your boiler water conductivity must be around 1500 to 2500 umhos in order to evaluate your proper chemical feed set point. Everything will cycle up with the conductivity.
For example, your city water is around 150 umhos. At 1500 unhos the water has recycled 10 times. If you boiler water is 300 umhos, it is only recycled 2 times. So if your boiler water is only 300 umhos, you will be using 10 times more chemical to get the sulfite in range. Remember with an all in one chemical the solubility of sulfite in the drum is much lower. So there is not a lot of sulfite in the drum. You are on the fence with a 200 hp boiler.
I would target using 3 gallon per week to start with. If your boiler is heavily used you may need more. After 30 to 45 days, lets see where we stand. If we are not getting enough sulfite, we can add a supplemental sulfite feed chemical that is more concentrated. Then you will have a two drum program. You will drastically reduce the one drum chemical to 1 gpw and then feed 2 gpw of sulfite.
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