XINLI BOILER

The role of scale inhibitor in biomass boiler

25 Oct, 2021

　　Before the biomass boiler runs, it is inevitable to complete the chemical water treatment process, so that the water quality can meet the standard. This process is very simple to implement, as long as an appropriate amount of anti-scaling agent is added to the feed water of the biomass boiler, so that it will chemically react with the hardness substances in the water in the boiler to achieve the purpose of preventing scaling.

　　Because once the anti-scaling agent reacts with certain substances in the water, it will generate loose and fluid slag, which will be removed with the blowdown, thereby preventing the biomass boiler from scaling. This processing method is not only low cost, simple equipment, but also easy to operate and convenient to manage.

　　In addition to the use of anti-scaling agents to prevent scaling, for sodium ion exchange treatment, when the residual hardness is large or the pH value and alkalinity of the boiler water of the biomass boiler cannot meet the standard requirements, the boiler needs to be added. Drug supplement processing.

　　It can be seen that the role of anti-scaling agent in biomass boilers is not only to prevent scaling, but also to maintain a certain alkalinity and pH value of the boiler water; and to form a protective film on the metal surface to prevent corrosion; it can even promote The old scales of sulfate and silicate are loose and fall off.

　　At present, there are many anti-scaling agents commonly used in biomass boilers, including soda ash, phosphates, composite anti-scaling agents, organic phosphates, etc., each of which has different advantages, disadvantages and usage methods, and is suitable for different applications. Under working conditions, it helps the biomass boiler to keep in good condition.

　　In addition, there are also specific dosages of anti-scaling agents in biomass boilers, which are generally determined based on the results of laboratory tests. After adding the chemicals, the pH and alkalinity of the boiler water should meet the national standards. Take soda ash as an example, because it will hydrolyze at high temperature to produce part of sodium hydroxide, so the dosage can be determined according to the difference between the total hardness and total alkalinity of the feed water.