Most of the industrial boilers in our country are basically coal-burning. In recent years, in order to save costs, factories have often selected inferior coal for boiler combustion. These inferior coals are likely to cause problems such as coking on the heating surface during the combustion process. When the heating surface of the boiler is coked, the heat transfer capacity decreases, and the heat absorption in the furnace decreases, which leads to an increase in flue gas temperature, an increase in boiler exhaust loss, and a decrease in boiler thermal efficiency. In severe cases, it may cause a tube burst accident on the heating surface. Therefore, the boiler coking The harm is great, seriously affecting the safety of the boiler. The correct and reasonable use of boiler decoking agent can prevent the boiler from coking, and at the same time, it can also improve the thermal efficiency of the boiler to a certain extent.
Boiler decoking mechanism: Adding chemicals can change the reaction process of minerals in the furnace, thereby changing its ash characteristics. From the 1930s, people began to use chemical additives to remove the dust on the heating surface of the boiler; in the 1960s, chemical additives with copper as the main component were used; in the 1980s, my country developed a series of decoking agents and successfully applied them to the boiler In addition to the focus. The boiler decoking agent chemically reacts with the coke lump in the boiler to loosen the coke lump and completely burn it, and finally discharge the dust generated by it through the flue.
Advantages of use:
Save coal and improve the economic benefits of coal;
Improve the thermal efficiency of the equipment and play an energy-saving effect;
Avoid accidents, ensure the normal operation of the boiler, and extend the service life of the boiler.
chemical components:
Commonly used decoking agents include three parts: copper compounds, magnesium compounds and nitrate compounds.
Copper compounds can reduce the ignition point of the existing carbon compound deposits, and can make the formed carbon compounds continue to burn to achieve the decoking effect; magnesium compounds usually have a neutralization reaction with vanadium compounds with high adhesion and low melting point, so that they do not have Corrosive; At the same time, the melting point of the deposit will also increase, so that the bond with the metal surface will be reduced, broken, and easily removed; nitrate has a certain oxidizing property, can provide oxygen, and will produce all the coke Burn off.
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