Cleaning of the boiler-boiler scale formation reasonNow chemical companies with large amounts of water every day, according to the information contained in water consumption in 500~600t/h. General factory use mostly groundwater, water contains large amounts of inorganic salts such as bicarbonates, carbonates, sulfates, chlorides, silicates, phosphates, sediment and organic matter. Brought to production scale, energy consumption, corrosion and other damage. &Nbsp;
scale components dominated by hydrochloric acid calcium and calcium phosphate.
when water containing calcium sulfate, calcium silicate, magnesium silicate, such as ion concentration above the solubility occurs when precipitation and deposition in the device on the wall. Therefore, the content of silica in water should not exceed 150mg/L. In addition containing oxygen in water, can also cause metal corrosion to form ferric scale.
due to the boilers of different operation conditions, differences in water quality, scale of the formation of different nature. Boiler scale, especially in the high-pressure boiler scale, primarily calcium and magnesium sulfates and silicates, iron scale, which at high temperatures to form hard, compact and complex; scale in the boiler to calcium and magnesium carbonate scale, iron scale, scale loose. Heat exchanger fouling is carbonate, sulfate, iron scale and silica scale and slime, fouling porous, non-water-soluble carbonates of calcium and magnesium and alkali salts. Therefore, the boiler acid-cleaning than conventional water heaters cleaning much more difficult and complex process.
high pressure boiler scale is based on iron oxides of aluminum, copper, nickel, mainly medium pressure and low pressure boiler scale is based on carbonate, silicate, sulphate, ferric oxide, and so on.