Harm of scale formed by Industrial Boiler in Chemical Plant to Boiler
The harm of scale formed by industrial boiler in chemical plant to boiler. 1. Boiler steel plate and pipeline are burned because of overheating. The key is that the thermal conductivity of boiler is very poor. The thermal conductivity of the material is generally measured by the thermal conductivity of the material, and the thermal conductivity of the scale is tens to hundreds of times smaller than that of the boiler steel plate. When the enemy of the heating surface of a large boiler, the heat transfer conditions deteriorate, so that the fire and smoke absorbed by the furnace tube can not pass through the well water, heating surface temperature and metal strength, which can easily lead to the expansion, deformation and tube explosion of the boiler tube. In addition, after scaling, the flow cross section area of the furnace tube decreases, the resistance of water cycle increases, and the damage is caused by the decrease of the flow cross section area of the furnace tube. The normal water circulation and cooling of the boiler results in the combustion loss of the furnace tube.
2. Waste fuel to reduce boiler output When the boiler is polluted, the heat transfer on the heating surface of the boiler will deteriorate and the exhaust gas temperature will rise. Due to the low thermal conductivity of the scale, the heat transfer is hindered, thus reducing the thermal efficiency of the boiler, increasing the fuel consumption and reducing the output of the boiler. It is proved that for boiler with working pressure of 1.3 MPa, it can waste 5%~8%of fuel by forming 1mm thick mixed scale.
3. After increasing the amount of boiler inspection and repair and endangering the scaling of the heating surface of the safe boiler, it is very difficult to remove the scale or pickling boiler, and the pickling boiler is easy to cause corrosion to the boiler, and the discharge of pickling waste liquid pollutes the environment. It not only damages the boiler life, but also needs a lot of manpower and material resources to carry on the maintenance, at the same time, it also threatens the personal safety and affects the safety of production.
