Boiler scale control; Scale is caused by the accumulation of hardness salts in the boiler water which, if not removed can cause localised overheating, reduced heat transfer efficiency, and in severe situations tube failure. Hardness salts can either be removed before they enter the boiler system or they can be treated inside the boiler itself with suitable Antiscalent/scale inhibitors.
Even when hardness is removed from the make-up water it is important to use an appropriate scale control programme within the boiler water to ensure that any hardness slippage is prevented from causing troublesome deposits.
To ensure that such boiler systems are well maintained and operate at optimum efficiency it is essential that the correct water conditions are maintained at all times. This can be achieved using carefully selected feed water scale and corrosion inhibitors designed specifically for industrial boilers and steam raising plant.
Use UNICHEM-3220 direct from the drum or mixed with soft water, or cool condensate in a dosing tank. In low pressure steam boilers (below 20 bar g) dose to generate 30 – 70ppm PO4 within the boiler water.
For best results dose UNICHEM-3220 continuously proportional to the feed water use. For further technical assistance please contact Unichem.
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