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Method for producing drinking water containing calcium and magnesium ions by ion-exchange

A technology of ion exchange and magnesium ions, applied in the field of drinking water treatment, can solve the problems of scale formation and failure to reach, and achieve the effect of eliminating environmental pollution, low cost and high safety performance

Inactive Publication Date: 2006-09-20
兰桂云
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] Drinking water sources such as tap water and deep well water contain mineralized soluble calcium bicarbonate [Ca(HCO 3 ) 2 ], magnesium bicarbonate [Mg(HCO 3 ) 2 ], which contains calcium ions (Ca + ) and magnesium ions (Mg + ), these ions are very important to human health, but after the water is heated, these ions will be precipitated due to the formation of precipitates, which not only fails to achieve the purpose of supplementing calcium and magnesium through drinking water, but also generates scale

Method used

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Examples

Experimental program
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Embodiment Construction

[0018] The following examples describe the present invention in more detail:

[0019] Choose any anion exchange resin such as 201×7, 201×4, 202×2, D202, D203, 331, 302×2, D301, D311, etc., first use the anion exchange resin with a concentration of 5-10% sodium chloride Solution treatment to make chlorine type strong or weak basic anion exchange resin.

[0020]

[0021] Among them, RY is a chlorine-type or hydroxide-type strong or weakly basic anion exchange resin, NaCl is a regeneration agent, RCl is a chlorine-type basic anion exchange resin, and NaY is a regeneration waste liquid.

[0022] The pre-pretreated tap water or deep well water is introduced into an exchanger filled with chlorine-type strong or weakly alkaline anion exchange resins for ion exchange to produce drinking water containing calcium and magnesium ions. The exchanger is a fixed bed Exchangers, floating bed exchangers, moving bed exchangers or any one of fluid bed exchangers for ion exchange.

[0023...

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Abstract

The ion exchange process of producing drinking water containing calcium and magnesium ions includes first treating anionic exchange resin with sodium chloride solution of 5-10 % concentration to prepare chlorine type alkaline anionic exchange resin, leading pre-treated water into the chlorine type alkaline anionic exchange resin exchanger for ion exchange to produce drinking water containing calcium and magnesium ions, and cleaning and regenerating used chlorine type alkaline anionic exchange resin with sodium chloride solution of 5-10 % concentration for reuse. The process can maintain effective Ca, Mg and other components, and is simple, low in cost and pollution-less.

Description

[0001] (1) Fields [0002] The invention relates to a water treatment method, in particular to a drinking water treatment method. (two), background technology [0003] The bottled or barreled drinking water currently sold on the market can be divided into mineral water, purified water and mineralized water. Pure water can be divided into pure demineralized water and drinking water containing calcium and magnesium ions. The desalinated water production process used in the production of drinking water is based on the typical industrial first-level desalinated water treatment method including cation exchange → carbon dioxide removal → anion exchange and other processes. Pretreatment of iron, manganese removal and activated carbon filtration, post-treatment processes such as activated carbon, ultraviolet deodorization, sterilization and disinfection are added after desalination. The production method of demineralized water is a mature and well-known method. The existing drinkin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/42C02F1/68
Inventor 兰桂云
Owner 兰桂云
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