If the water of the steam boiler is not treated with soft water, it is easy to scale. What effect does the scale have on the steam boiler? Shaanxi burner tells you:
1.Waste fuel and reduce thermal efficiency
Fouling will lead to poor thermal conductivity of the boiler. Once the steam boiler is fouled, the heat transfer performance of the heating surface of the steam boiler will be poor. The heat released by the fuel combustion cannot be completely transferred to the boiler water, and a part of the heat will be The flue gas is taken away, which causes the exhaust temperature to rise, causing a large amount of heat loss, and the thermal efficiency of the steam boiler will be reduced. In this case, in order to ensure the parameters of the steam boiler, more fuel will be added for non-combustion to increase the furnace temperature and flue gas temperature, which will cause waste of fuel.
2. Affect the safe operation of steam boilers
The thermal conductivity of the boiler is deteriorated due to scale, and the local temperature of the metal pipe wall will increase. When the temperature exceeds the range that the metal can withstand, the metal will creep due to overheating and the strength will decrease. Under the working pressure of the boiler, the metal will occur. Bumps, perforations and cracks that affect safe operation.
3. A tube burst accident occurred
Scale can cause corrosion of the metal under the scale, and under the condition that scale adheres to the heated surface, the pot water seeping from the scale holes and gaps will evaporate rapidly between the deposited scale layer and the heated surface. Under the scale layer, the pot water can be concentrated to a very high concentration. Some of these substances can cause severe corrosion on the heating surface of the steam boiler under high temperature and high concentration conditions, such as NaOH. The scaling and corrosion processes promote each other, which will quickly cause damage to the heated surface of the metal, which will cause a tube burst accident.
4. Reduce output of steam boiler
Boiler fouling and poor heat transfer performance. In order to achieve the rated evaporation or heat output, more fuel is required. As the thickness of the fouling increases, the grate area of the furnace volume is constant, and fuel consumption is limited. Therefore, the output of the furnace will be reduced.
5. Reduce the service life of the steam boiler
The scale must always be thoroughly and completely removed to ensure the safe operation of the steam boiler. Whether it is manual, mechanical, or chemical descaling will affect the service life of the boiler.