论文部分内容阅读
在低压锅炉的化学清洗中,经常采用各种不同的药剂及配方,其中主要成份是起清洗作用的酸及起防腐作用的缓蚀剂。对于碳酸盐水垢及含有一定量硅酸盐的混合水垢,通常采用缓蚀盐酸就能得到较高的清除效率;但对于SiO_2含量高达30%以上或其含量虽小于20%但却均匀分层的硅酸盐水垢,特别是质地较致密的硬质硅酸盐水垢,则缓蚀盐酸的清除效率较低。如果垢中含油,其清除效率会更低,只有40%左右。因此,我们对硅酸水垢通常采用氢氟酸或向缓蚀盐酸中填加氟化物清洗的办法以取得较满意的清洗效果。这就涉及到如何正确使用氟化物的问题。我们对于不同炉型、结有不同特性的硅酸盐水垢(SiO_2含量>20%)的低压锅炉进行了缓蚀盐酸与氢
In low-pressure boiler chemical cleaning, often using a variety of different agents and formulations, including the main ingredient is the role of cleaning acid and antiseptic corrosion inhibitor. For carbonate scale and mixed scale containing a certain amount of silicate, high removal efficiency can be obtained by using HCl as a rule. However, for SiO 2 content of more than 30% or less than 20%, it is uniformly layered Silicate scale, especially the dense texture of hard silicate scale, the corrosion of hydrochloric acid removal efficiency is lower. If the scale oil, its removal efficiency will be lower, only about 40%. Therefore, we usually use hydrofluoric acid for silicic acid scale or fluoride solution for corrosion hydrochloric acid to get more satisfactory cleaning effect. This involves the question of how to properly use fluoride. We have a different type of furnace, with different characteristics of silicate scale (SiO 2 content> 20%) of the low-pressure boiler corrosion hydrochloric acid and hydrogen