[Must-read for dyeing factories] How to remove tank scale in the printing and dyeing process
In life, we will encounter all kinds of scale, which affects our lives. During the printing and dyeing finishing process, we will encounter more different ingredients and different types of tank scale, which seriously affects product quality and even production safety.
1. Classification and hazards of tank scale
1Inorganic salt tank scale
The main component of inorganic salt tank scale is carbonate of calcium and magnesium ions
Hazards: a. Affect heat exchange and reduce heat utilization.
b. The boiler will be heated unevenly, causing the boiler to be damaged or even explode.
c. Hard lumps are formed in the cylinder, causing fabric scratches and yarn snagging.
2 Oligomers, slurries, oil tank dirt
The main ingredients are polyester oligomer and polyacrylate.
Hazards: Oligomers, slurries and dyes accumulate in the vat, causing stains and color spots on the surface of the fabric.
2. Descaling
2 Inorganic Salt Tank Scale
Acid descaling method: a. Choose organic acid as the descaling agent, which can clean the scale and cause less damage to the equipment.
b. Descaling conditions: temperature around 110°C, 50-120 minutes.
2 Oligomers, slurry tank scale
a. Choose fatty alcohol ethers as a descaling agent. This descaling agent has good solubilization, emulsification, and dirt-carrying capabilities, and can disperse and emulsify oligomers and slurries. , to achieve the purpose of descaling.
b. Descaling conditions: temperature around 120°C, 50-120 minutes.
3. Preventing the generation of tank scale
Added chelating dispersant in pre-treatment and coloring, it can not only combine with calcium and magnesium ions to prevent the generation of inorganic salt tank scale, but also disperse and emulsify oligomers and slurries to prevent this Similar cylinder scale is produced.
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