A Combined Water Treatment Method for Simultaneously Removing Sulfate, Hardness and Total Dissolved Solids

A technology of total dissolved solids and sulfate, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. Excessive sulfate content and other problems, to achieve the effect of good promotion and application prospects, beneficial to human health, and avoid secondary pollution

Active Publication Date: 2016-08-31
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual groundwater, in addition to the high total hardness, there will also be water quality problems such as high sulfate content and high total dissolved solids content.
[0003] At present, in the field of drinking water treatment, there are relatively many applications and researches on hardness removal methods, such as various types of softening agents and corresponding treatment equipment or devices. However, the removal of sulfate is relatively difficult, and it can be effectively used in actual water treatment at present. The main approaches are reverse osmosis, electrodialysis and ion exchange, but in practical applications, there are also problems such as high cost of use and high yield of wastewater; total dissolved solids is another indicator that is difficult to effectively control, and it is also necessary to use reverse osmosis, Electrodialysis and ion exchange methods to control

Method used

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  • A Combined Water Treatment Method for Simultaneously Removing Sulfate, Hardness and Total Dissolved Solids
  • A Combined Water Treatment Method for Simultaneously Removing Sulfate, Hardness and Total Dissolved Solids
  • A Combined Water Treatment Method for Simultaneously Removing Sulfate, Hardness and Total Dissolved Solids

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Embodiment 1

[0023] A combined water treatment method for the simultaneous removal of sulfate, hardness and total dissolved solids, comprising the following steps:

[0024] (1) Use special magnetic resin to remove sulfate in water, and obtain primary purified water through solid-liquid separation; among them, special magnetic resin is magnetic anion exchange resin, and its exchange group is bicarbonate; special magnetic resin removes sulfate in water The sulfate treatment process adopts the direction of upward flow; at the same time, synchronously extract the invalid resin and add the regenerated resin to keep the total capacity of the resin in the system relatively stable; the regeneration method of the special magnetic resin is: use sodium bicarbonate with a concentration of 5% Solution treatment for 45min;

[0025] (2) Add hardness-removing medicament to coagulate in the first-level purified water, contact and filter to remove sediment to obtain secondary purified water; wherein, the ha...

Embodiment 2

[0034] A combined water treatment method for the simultaneous removal of sulfate, hardness and total dissolved solids, comprising the following steps:

[0035] (1) Use special magnetic resin to remove sulfate in water, and obtain primary purified water through solid-liquid separation; among them, special magnetic resin is magnetic anion exchange resin, and its exchange group is bicarbonate; special magnetic resin removes sulfate in water The sulfuric acid treatment process adopts the upward flow direction; at the same time, the invalid resin is extracted synchronously and the regenerated resin is added to keep the total capacity of the resin in the system relatively stable; the regeneration method of the special magnetic resin is: use sodium bicarbonate with a concentration of 8% Solution treatment for 30min;

[0036] (2) Add hardness-removing medicament to coagulate in the first-level purified water, contact and filter to remove sediment to obtain secondary purified water; wh...

Embodiment 3

[0045] A combined water treatment method for the simultaneous removal of sulfate, hardness and total dissolved solids, comprising the following steps:

[0046] (1) Use special magnetic resin to remove sulfate in water, and obtain primary purified water through solid-liquid separation; among them, special magnetic resin is magnetic anion exchange resin, and its exchange group is bicarbonate; special magnetic resin removes sulfate in water The sulfate treatment process adopts the upward flow direction; at the same time, the invalid resin is extracted synchronously and the regenerated resin is added to keep the total capacity of the resin in the system relatively stable; the regeneration method of the special magnetic resin is: use sodium bicarbonate with a concentration of 10% Solution treatment for 15 minutes;

[0047] (2) Add hardness-removing medicament to coagulate in the first-level purified water, contact and filter to remove sediment to obtain secondary purified water; wh...

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Abstract

The invention provides a combined water treatment method for synchronously removing sulfate, hardness and total dissolved solids. The combined water treatment method comprises the following steps of removing sulfate in water by using special magnetic resin, and carrying out solid-liquid separation to obtain first-grade purified water; adding a hardness removing agent into the first-grade purified water to coagulate, and removing a sediment through contact filtration to obtain second-grade purified water; and carrying out fine filtration on the second-grade purified water, and sterilizing to obtain the product water. The combined water treatment method can be used for synchronously removing sulfate, total hardness and total dissolved solids, has the characteristics of convenience in use, flexibility in operation, wide application range and the like, and has relatively good popularization and application prospects.

Description

technical field [0001] The invention belongs to the field of water treatment equipment, in particular to a combined water treatment method for synchronously removing sulfate, hardness and total dissolved solids. Background technique [0002] Too high or too low water hardness will affect our human health, and it will also bring inconvenience to daily life. For example, when washing with hard water, it will react with soap to produce insoluble precipitates. In addition to affecting the washing effect, it will also make the fibers of the clothes hard, brittle and easily damaged. When washing hair with hard water, it will be astringent. The current "Drinking Water Sanitation Standard" (GB5749-2006) stipulates that the total hardness content in drinking water should be less than 450mg / L (calculated as CaCO 3 count). In the actual groundwater, in addition to the high total hardness, there will also be water quality problems such as high sulfate content and high total dissolved ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04
Inventor 刘成何思源陈卫崔彪
Owner HOHAI UNIV
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