As of now, we are clear that in every boiler, scale/deposit formation is going to take place. As we cannot bear the losses mentioned above, it is necessary that these scales and deposits are either prevented from being formed and also boilers are regularly monitored for their levels and cleaned when the layers are formed. There are different types of scales or deposits which get formed inside a boiler. To attain …

(2) Lowering of boiler safety : Due to scale formation, over-heating of boiler is to be done in order to maintain a constant supply of steam. The over-heating of the boiler tube makes the boiler material softer and weaker and this causes distortion of boiler tube and makes the boiler unsafe to bear the pressure of the steam, especially in high-pressure boilers.

Boiler Scaling : Well, a scale is a deposit formed over the heat transfer surface when the solubility limits of the constituents of water are exceeded resulting in the precipitation of compounds over the surface.

Scaling in boilers 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. Evaporation in a boiler causes impurities to concentrate. This interferes with heat transfers and may cause hot spots.

Silica Scaling in Boilers. Silica, in amounts ranging from less than 1 to over 100 ppm, is found in all natural water supplies. In rain hail and snow, silica content range from 1 to 2.8 ppm. In the analyses of various surface and ground waters, silica content range from 1 to 107 ppm. This refers to soluble silica content and not to the silica that may be present in the suspended matter. Suspended matter may be …

• Overview

  Scaling in Boiler Tubes, Detection and Prevention Metho

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  • Overview09-03-2015· Scaling of inside tube boiler causes pressure drops, restrict circulation and changing in fluid hydrodynamics conditions and affecting on heat transfer and fluid flow behavior, deposit cause
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