To achieve a relatively ideal dyeing and printing effect, the dyeing and printing industry has strict standards for water used. The hardness of water is also one of the main factors affecting the dyeing and printing effect, and the quality of water plays a decisive role.

　　The fully automatic flow-type softened water equipment for the printing and dyeing industry conducts deep treatment of printing and dyeing water. The water quality used meets the water standards of the printing and dyeing industry, ensuring the smooth completion of the entire printing and dyeing process.

　　The fully automatic flow-type softened water equipment in the printing and dyeing industry adopts a fully automatic flow-type softened water control valve. When the pressure difference between the inlet and outlet of the valve changes, it maintains a constant flow rate through the valve, thereby maintaining a constant flow rate of the controlled object connected in series with it. This eliminates the inconvenience brought by manual control and makes the operation more convenient.

　　The working principle of the fully automatic flow-type softened water equipment in the printing and dyeing industry

　　The hardness of water is mainly composed of calcium, magnesium and ions. When raw water containing hardness ions passes through the resin layer inside the water softener, calcium, magnesium and other ions in the water are exchanged and adsorbed by the resin, while an equal amount of sodium ions are released at the same time. The water flowing out of the softened water treatment equipment is softened water with hardness ions removed. When the resin has absorbed a certain amount of calcium and magnesium ions, it undergoes regeneration. The regeneration process involves flushing the resin layer with brine from the salt tank to displace the hardness ions on the resin and discharge them out of the tank with the regeneration waste liquid. Thus, the resin regains its softening exchange capacity.

　　When the concentration of hardness ions is not high (the total hardness is less than5mmol/LCation exchange resin can be used to replace and soften the raw water. If the total hardness of the raw water is too high, other treatment methods need to be used in combination.

　　toRNaFor sodium-type cation exchange resins, the main chemical reactions mentioned above are as follows:

　　2RNa+Ca2+=R2Ca+2Na+

　　2RNa+Mg2+=R2Mg+2Na+

　　After the cation exchange resin reaches saturation, it can be regenerated with clear and filtered brine, and the resin can be reused multiple times.