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