Processing method for improving printing water quality in printing process

The treatment of water can be said to be performed in a variety of ways, such as: distillation, demineralized water treatment, activated carbon filtration, microfiltration, ultrafiltration, reverse osmosis filtration, and the like.

1, softened water treatment

The sodium chloride-infiltrated resin is used to filter the water. When the sodium ions that have been combined with the resin meet the calcium, magnesium, and manganese ions in the water, they will be replaced by these ions, that is, the nano-particles will enter the water and the calcium Magnesium ions are adsorbed on the resin.

This treatment can effectively reduce the hardness of water (ie, reduce the content of calcium and magnesium ions in water), but it is worth noting that the conductivity of water itself does not change because the concentration of ions contained in the water does not change.

2. Ion removal

This method uses a cation resin exchanger and an anion resin exchanger to exchange the anions and cations in water, respectively. When the pressurized water passes through the exchange system, ions in the water are adsorbed by the resin, hydrogen ions or hydroxide ions in the resin are displaced into the water, and the charged resin is also consumed. When the resin fails, the resin can be reduced with strong acids and bases.

There are two main types of equipment for water treatment in this way:

1 double bed resin exchange equipment. This device generally has two resin containers (Yin and Yang).

2 mixed type. The use of anionic and cationic resins is mixed at a certain ratio and used at the same time. If the mixing ratio is appropriate, the treated water quality is very good.

3, reverse osmosis

Under normal conditions, the diffusion of water is diffused from a place where the concentration is low and where the concentration is high. The reverse osmosis method uses a certain material and means to reverse this process, and makes the concentration of water from the high concentration direction low under pressure. The proliferation of places. Reverse osmosis is a relatively thorough impurity removal technique that can remove 90 to 95% of the impurities in our drinking water under normal circumstances. More commonly used filter materials are: cellulose acetate membrane, polyamide membrane and composite membrane.