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Preparation method of solid polymeric ferric chloride silicate flocculant

A technology of solid-state polymerization and polymerization of silicic acid, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of not providing the preparation method of polymerized iron silicate flocculant, and the preparation method is in the laboratory stage, etc., and achieves excellent turbidity removal effect. , beneficial to human health, and the effect of promoting development and growth

Inactive Publication Date: 2012-11-14
艾有年 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyferric sulfate accounts for about 5-10% of the flocculant in my country. It is not as toxic as aluminum, but it is corrosive to equipment and the price is relatively expensive.
[0004] In addition, there are also literature reports on the application of polyferric silicate as a water purification treatment agent, but its preparation method is still in the laboratory stage, and no mature method suitable for industrial application has been provided. Preparation method of polymerized iron silicate flocculant

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Take raw materials:

[0032] Take by weighing 33kg of hydrochloric acid and inject it into 500 liters of water; get the liquid sodium silicate whose mass fraction of silicon dioxide is 29.2%; wherein the content of silicon dioxide is 23kg; place the liquid sodium silicate in 400 liters of water to obtain silicic acid Sodium aqueous solution, mix well and set aside; take ferric chloride (FeCl 3 ) 63kg.

[0033] Preparation steps:

[0034] Pour 500 liters of water into the reaction tank, pour 33kg of hydrochloric acid into the water under stirring; slowly inject the sodium silicate aqueous solution into the reaction tank under stirring, react with hydrochloric acid, and measure the pH value of the liquid in the tank at any time, when the pH When the value reaches 5, stop the injection; continue to stir for 40 minutes, so that the silicic acid produced can form polymeric silicic acid; put 61kg of ferric chloride into the tank five times, and keep stirring to ...

Embodiment 2

[0038] Take raw materials:

[0039] Weigh 30kg of hydrochloric acid and inject it into 500 liters of water; get the liquid sodium silicate with a mass fraction of silicon dioxide of 22.1%; wherein the content of silicon dioxide is 18kg; place the liquid sodium silicate in 450 liters of water to obtain silicic acid Sodium aqueous solution, mix well and set aside; take ferric chloride (FeCl 3 ) 58kg.

[0040] Preparation steps:

[0041] Pour 500 liters of water into the reaction tank, pour 30kg of concentrated hydrochloric acid into the water under stirring; slowly inject the sodium silicate aqueous solution into the reaction tank under stirring, react with hydrochloric acid, and measure the pH value of the liquid in the tank at any time, when When the pH value reaches 3, stop the injection; continue to stir for 50 minutes, so that the silicic acid produced can form polymerized silicic acid; put 58kg of ferric chloride into the tank in four times, and keep stirring...

Embodiment 3

[0045] Take raw materials:

[0046] Weigh 30kg of hydrochloric acid and inject it into 500 liters of water; get the liquid sodium silicate with a mass fraction of silicon dioxide of 24.2%; wherein the content of silicon dioxide is 20kg; place the liquid sodium silicate in 500 liters of water to obtain silicic acid Sodium aqueous solution, mix well and set aside; take ferric chloride (FeCl 3 ) 60kg.

[0047] Preparation steps:

[0048] Pour 500 liters of water into the reaction tank, pour 30kg of hydrochloric acid into the water under stirring; slowly inject the sodium silicate aqueous solution into the reaction tank under stirring, react with hydrochloric acid, and measure the pH value of the liquid in the tank at any time, when the pH When the value reaches 4, stop the injection; continue to stir for 1 hour, so that the silicic acid produced can form polymeric silicic acid; put 61kg of ferric chloride into the tank three times, and keep stirring to dissolve it. ...

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Abstract

The invention relates to a flocculant used for purifying the water quality, and in particular relates to a preparation method of solid polymeric ferric chloride silicate flocculant. The preparation method comprises the following steps of: selecting concentrated hydrochloric acid and injecting the selected concentrated hydrochloric acid into water to prepare diluted hydrochloric acid; taking liquid state sodium silicate and putting the liquid state sodium silicate into water to obtain sodium silicate water solution; adding the diluted hydrochloric acid into a reaction tank, slowing injecting the sodium silicate water solution into the reaction tank, and putting ferric trichloride into the reaction tank for a plurality of times for dissolving; standing still to form polymeric iron silicate; and micro-heating to obtain the solid polymeric ferric chloride silicate flocculant. The flocculant only contains two raw materials including Fe and Si, wherein Fe is non-toxic and is essential trace element of the human body, and iron-deficiency anemia can be caused when the human body is lack of the Fe; Si has the function of promoting development and growth; and when the metasilicic acid content in drinking water is more than 25mg / L, the drinking water belongs to mineral water and can be used for preventing diseases after being drunk for a long time, thus having the health care function of prolonging the life. The flocculant not only has excellent turbidity removal function, but also can remove harmful substances such as heavy metal, thus being beneficial to the health of human body.

Description

technical field [0001] The invention relates to a flocculant for purifying water, in particular to a preparation method of a solid-state polysilicate ferric chloride flocculant. Background technique [0002] At present, polyaluminum chloride (PAC) and polyferric sulfate (PFS) are mostly used as water purification agents at home and abroad. Polyaluminum chloride has a certain impact on human health because it contains a large amount of aluminum. Scientific research and epidemiological investigations have confirmed that after aluminum enters the human body through various channels, through accumulation and participation in many biochemical reactions, it can replace, lose or deposit essential nutrients and trace elements in the body, and interfere with and destroy the physiological functions of various parts , leading to poisoning symptoms such as aluminum encephalopathy and aluminum anemia in the human body. It has been reported in medical literature that after long-term int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 艾有年孙安
Owner 艾有年
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