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Polishing mixed bed pure water equipment, pure water equipment, ultra pure water equipment

Release date: November 27, 2019 11:49:14

 

  1、 What is pure water equipment of polishing mixed bed
The combined equipment that uses RO pure water equipment and polishing mixed bed to prepare pure water is generally installed at the end of RO pure water equipment system and EDI high-purity water equipment to improve the purity of effluent water.
2、 Effluent quality of polishing mixed bed pure water equipment
Generally, the effluent quality of polishing mixed bed pure water equipment can reach 5-18 megohm, and has certain control ability to TOC and SiO2. The ion type of polishing resin is h and oh type, and it can be used after loading without regeneration.
3、 Common technology of polishing mixed bed pure water equipment
1. Preparation of 18 megohm ultrapure water
   Raw water tank → raw water pump → dosing device → multi-media filter → dosing device → activated carbon filter → automatic softener → security filter → primary high-pressure pump → primary reverse osmosis system → intermediate water tank → secondary high-pressure pump → secondary reverse osmosis system → pure water tank → pure water pump → TOC decomposer → degassing membrane → precision filter → EDI device → pure water tank → pure water pump → polishing and mixing Bed → membrane filter → water consumption point of production line.
2. Preparation of 5-10 megohm ultrapure water
Raw water tank → raw water pump → dosing device → multi-media filter → dosing device → activated carbon filter → automatic softener → security filter → primary high-pressure pump → primary reverse osmosis system → secondary high-pressure pump → secondary reverse osmosis system → pure water pump → polishing mixed bed → membrane filter → water consumption point of production line.
4、 Advantages of pure water equipment for polishing mixed bed
1. When preparing high-purity water, it is selected to prepare ultra pure water above 18 megohm, which is used in the back of EDI pure water equipment,.
2. When preparing pure water, polishing mixed bed can be selected to save EDI cost
3. Saving equipment cost
5、 Shortcomings of pure water equipment for polishing mixed bed
In order to obtain theoretical pure water with conductivity of 0.055 μ s / cm (resistivity of 18.2 m Ω· cm) for electronic, pharmaceutical or other industries, polishing mixed bed is usually installed after ordinary mixed bed or EDI water purification equipment for final polishing. The resin used in the polishing mixed bed is a mixture of anion resin and cation resin with close relative density. Because it is impossible to separate the anion and cation resins of this resin and regenerate them separately with acid and alkali, the polishing resin is discarded after failure.