Scale is a buildup of solid material formed on internal boiler surfaces.
Boiler water hardness scale.
Boiler scale is caused by impurities being precipitated out of the water directly on heat transfer surfaces or by suspended matter in water settling out on the metal and becoming hard and adherent.
Therefore good internal boiler water treatment programs are necessary.
Most boiler systems have sodium zeolite softened or demineralized makeup water.
Feedwater hardness usually ranges from 0 01 to 2 0 ppm but even water of this purity does not provide deposit free operation.
Leading to local overheating.
A serious loss of boiler efficiency and possibly boiler failure.
Controlling boiler scale prevent scale and corrosion using chemicals inside the boiler.
Chemicals are designed to polish away small amounts of hardness that by passes the softener.
Evaporation in a boiler causes impurities to concentrate.
In addition hardness salts can precipitate from the boiler water to form sludge and eventually scale which deposits on the internal surfaces of the boiler.
This interferes with heat transfers and may cause hot spots.
Water hardness is the measure of the amount of calcium and magnesium in the water.
Hard water is one of the worst things that can happen to your industrial boiler.
In addition to the overheating and eventual failure of the boiler tubes due to scale efficiency is also decreased in the short term because of the scale s insulating effect on the heat transfer surfaces.
Small amounts of hardness and iron can get into the boiler.
In treated waters alkalinity may also be contributed by hydroxide phosphate silicate and.
Water hardness is the primary source of scale in boiler equipment.
Silica in boiler feedwater can be a problem.
Preventing and minimizing hard water is one of the key hallmarks of boiler maintenance best practices hard water contains elements like magnesium and calcium that can build up in your boiler to form what s known as scaling.
Scaling mechanism is the exceeding of the.
Always use a softener to ensure good boiler water quality.
How can i monitor my boiler s water hardness.
73 control feed of chemicals that prevent scale.
A boiler that makes up 4000 gal day of water having 100 ppm of hardness has a potential of accumulating over 1000 pounds of scale per year.
Water systems using groundwater as a source are concerned with water hardness since as water moves through soil and rock it dissolves small amounts of naturally occurring minerals and carries them into the groundwater supply water is a great solvent for calcium and magnesium so if the minerals are present in the soil around a water supply well hard water may be delivered to homes.
Small amount of boiler water drawn off near surface.
