The role of anti-scaling agent in biomass hot water furnace with drug treatment
Biomass Hot water blast furnaceNega Potion Treatment is by adding an appropriate amount of anti-scaling agent in the water supply, so that it in the pot and water hardness material chemical reaction, the formation of loose, liquid water slag, with the discharge of sewage to prevent biomass steam boiler scaling method. In-pot dosing treatment method has the advantages of less investment, simple equipment, easy operation and convenient management, but its anti-scaling effect is not as good as the chemical treatment method outside the pot, for horizontal fuel steam boiler, simple pot water treatment is only applicable to the vertical furnace without cooling wall pipe. Other than that
For sodium ion exchange treatment, when the residual hardness is large or the ph value and alkalinity of the pot water can not meet the standard requirements, it is also necessary to carry out in-pot dosing supplementary treatment.
First, the main role of anti-scaling agent
1, with the hardness of the reaction to produce water slag, sewage removal, to prevent biomass hot water furnace scaling.
2, to maintain the alkalinity of the pot water and ph value.
3, on the metal surface to form a protective film to prevent corrosion,
4, promote sulfate, silicate old scale loose shedding.
Second, the commonly used anti-scaling agent
1, soda (sodium carbonate), can be used alone, but also often with other agents to form a composite anti-scaling agent.
2, phosphate, often as a separate external chemical treatment after the elimination of residual hardness of the correction treatment agent, can also be used as a composite anti-scaling agent of the composition of-. Sodium phosphate is generally used, and when the alkalinity of water supply is high, disodium hydrogen phosphate or two sodium phosphate is also used to reduce alkalinity.
3, composite anti-scaling agent, according to different water quality characteristics of the selection of suitable agents according to the ratio of inverted composition.
4, organic phosphine acid salt, polycarboxylic acid salt and other organic synthetic anti-scaling agent, with. The use of less anti-scaling effect of good advantages, but the price is more expensive, the current biomass steam boiler dumping is still less.
Third, the amount of anti-scale agent: The amount of anti-scaling agent according to the test results to determine, after the addition of medicine should make the ph value and alkalinity of pot water to meet national standards. Because sodium carbonate hydrolysis produces some sodium hydroxide at high temperatures, the general anti-scaling agent is composed of sodium carbonate, sodium phosphate and tannin extract, and the dosage can be based on the difference between the total hardness of the water supply and the total alkalinity.