The hardness must be removed in the makeup water to the return system.
Boiler water hardness.
Every effort should be made to prevent oils from getting into the boiler water.
Feedwater condensate make up water for increases in hardness calcium and magnesium concentrations.
Water hardness levels are typically checked manually through the use of chemical reagents but such measurements are time consuming and can result in incorrect readings.
The nalco water hardness response program incorporates a state of the art hardness analyzer that monitors the process stream.
Water treatment recommendations vary depending on the operating pressure of the boiler the application steam or hot water and other parameters.
The below table is the total dissolved solids or tds alkalinity and hardness versus boiler pressure.
Colloidal particles are less than 0 000 1 mm in diameter and.
However boiler water is deliberately softened to prevent scale formation and this gives it a propensity to foam.
Total alkalinity 600 ppm maximum.
While hard water may not be harmful to you directly it can cause a number of problems with your plumbing system and appliances using water including your boiler.
Total silica 150 ppm maximum.
First knowing the water source is important whether it is from ponds rivers ground wells or city water.
You may notice that you hear a.
Hard water is water that has a higher than usual mineral content.
General guidelines to prevent corrosion and scaling in low pressure boilers are as follows.
Boiler sludge concentrations created by coagulation treatment may be avoided by sodium phosphate treatment when water hardness is less than 60 mg l.
With adequate alkalinity addition of sodium phosphate produces an insoluble precipitate of hydroxyapatite with magnesium hydroxide and magnesium and calcium silicates.
In boilers the hardness of the water can cause the formation of scale and sludge or mud.
Milk causes violent foaming.
Feedwater hardness usually ranges from 0 01 to 2 0 ppm but even water of this purity does not provide deposit free operation.
The minerals in the hard water can lead to scale building up within your boiler.
Total hardness should not exceed 50 ppm.
Hardness hard water does not foam.
Oil causes foaming or combines with suspended solids to.
Colloidal substances contamination of boiler water with a colloid in suspension for example.
Therefore good internal boiler water treatment programs are necessary.
Colormetry solves all these problems by offering automated reagent injection mixing and evaluation integrated into the boiler control system.
