Descaling equipment company

  Descaling equipment company
The possible components of common scale are as follows:
Calcite crystalline calcium carbonate
Anhydrite ABCD calcium
Single wollastonite 2CaO * 2SiO2 * 3H2O
Xonotlite 5cao * 5sio2 * H2O
Wollastonite CaSiO3
Calcium hydroxide
Phosphocalcic soil Ca3 (PO4) 2 * H2O (produced when alkalinity is low)
Cone pyroxene Na2O * Fe2O3 * 4sio2
Scale is mainly formed by the precipitation of calcium, magnesium and other salts contained in boiler feed water after heating and bonding to the metal surface
The thermal conductivity of scale is very small, about 2 ~ 5% of that of ordinary steel
Scale on the heating surface of boiler will greatly deteriorate the heat transfer effect and affect the efficiency of boiler; It is easy to burn out metal materials due to local overheating, and even pipe explosion accidents; It will aggravate electrochemical corrosion, cause boiler scale corrosion and accelerate the damage of heating surface
After the scale is formed, it shall be removed in time by mechanical or chemical methods
The effective way to prevent or slow down the formation of scale is to strictly control the quality of feed water and take appropriate measures such as boiler water treatment and boiler blowdown

Scale hazard
1
Scale has poor thermal conductivity, which will lead to the deterioration of heat transfer on the heating surface, thus wasting fuel or electricity

2
If scale is attached to the heating surface of thermal equipment, it will endanger the safe and economic operation of thermal equipment
Because the thermal conductivity of scale is very poor, which hinders heat transfer
The heat absorbed by the furnace tube from the flame side can not be well transmitted to the water supply, and the cooling of the furnace tube is affected
In this way, the wall temperature increases, resulting in the bulge of the furnace tube and Bao tube