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Poly ferro-silicon-titanium coagulant used for treating low-sludge amount water and preparation technology thereof

A technology of water treatment and sludge volume, applied in the field of water treatment, to achieve the effect of mature technology, simple equipment and high efficiency of pollution removal performance

Inactive Publication Date: 2015-08-05
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, in domestic and foreign databases, there is no relevant literature report on polysilicon ferro-titanium coagulant for water treatment prepared by metatitanic acid waste and water glass

Method used

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  • Poly ferro-silicon-titanium coagulant used for treating low-sludge amount water and preparation technology thereof
  • Poly ferro-silicon-titanium coagulant used for treating low-sludge amount water and preparation technology thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] At a stirring speed of 100 rpm to 300 rpm, add 25L of water to 15L of water glass to obtain a water glass dilution, and then at a stirring speed of 300 rpm to 500 rpm, the Add the above diluted water glass solution to 3L of dilute sulfuric acid solution with a mass fraction of 45%, control the pH value to 3~3.5, stir for 5 minutes, and let it stand for 5 hours to obtain a polysilicic acid solution for later use. At a stirring speed of 50 rpm to 100 rpm, add 50L of water to 50kg of metatitanic acid waste to form a paste, and then stir at a temperature of 90 ° C ~ 100 ° C and 100 rpm At a stirring speed of ~200 rpm, 85L of concentrated sulfuric acid solution with a mass fraction of 80% was added to the above paste to carry out leaching reaction, and the reaction time was controlled to be 1 hour to obtain a leaching solution. Under the condition of 100 rpm to 300 rpm, add 100L of water to the above leaching solution to obtain a leaching dilution, filter to obtain a filtrat...

Embodiment 2

[0031] At a stirring speed of 100 rpm to 300 rpm, add 30L of water to 15L of water glass to obtain a water glass dilution, and then at a stirring speed of 300 rpm to 500 rpm, mix Add the above diluted water glass solution to 4L of dilute sulfuric acid solution with a mass fraction of 40%, control the pH value to 2~3, stir for 5 minutes, and let stand for 12 hours to obtain a polysilicic acid solution for later use. At a stirring speed of 50 to 100 rpm, add 28L of water to 28kg of metatitanic acid waste to form a paste, and then stir at a temperature of 90°C to 100°C and 100 rpm At a stirring speed of ~200 rpm, 45L of concentrated sulfuric acid solution with a mass fraction of 75% was added to the above-mentioned paste, and the leaching reaction was carried out. The reaction time was controlled to be 2 hours to obtain a leaching solution. Under the condition of 100 rpm to 300 rpm, add 50L of water to the above leaching solution to obtain a leaching dilution, filter to obtain a ...

Embodiment 3

[0033] At a stirring speed of 100 rpm to 300 rpm, add 30L of water to 15L of water glass to obtain a water glass dilution, and then at a stirring speed of 300 rpm to 500 rpm, mix Add the above diluted water glass solution to 4L of dilute sulfuric acid solution with a mass fraction of 40%, control the pH value to 2~3, stir for 5 minutes, and let stand for 12 hours to obtain a polysilicic acid solution for later use. At a stirring speed of 50 to 100 rpm, add 28L of water to 28kg of metatitanic acid waste to form a paste, and then stir at a temperature of 90°C to 100°C and 100 rpm At a stirring speed of ~200 rpm, 45L of concentrated sulfuric acid solution with a mass fraction of 75% was added to the above-mentioned paste, and the leaching reaction was carried out. The reaction time was controlled to be 2 hours to obtain a leaching solution. Under the condition of 100 rpm to 300 rpm, add 50L of water to the above leaching solution to obtain a leaching dilution, filter to obtain a ...

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Abstract

The invention relates to a method for preparing a high-molecular ferro-silicon-titanium coagulant used for water treatment; wherein the high-molecular ferro-silicon-titanium coagulant is formed by production of nontoxic titanium mud solid refuse during a titanium white production process. The preparation method comprises the following steps: performing an acid leaching reaction at a first phase on titanium mud by a hydrochloric acid solution to obtain a leaching liquid I and a filter residue I; performing the acid leaching reaction at a second phase on the filter residue I by a concentrated sulfuric acid solution to obtain a leaching liquid II and a filter residue II; then performing an alkali leaching reaction on the filter residue II by highly basic; and finally performing an oxidation slaking reaction on a mixed leaching liquid of the leaching liquid I, the leaching liquid II and a leaching liquid III by an oxidizing agent. The coagulant used for water treatment has high efficiency for removing organic matter and chroma, and can be used for pretreatment and deep treatment for city sewage or industrial wastewater.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and relates to a polysilicon-iron-titanium coagulant for water treatment with low sludge content prepared from metatitanic acid waste produced in the production process of titanium dioxide and water glass as main raw materials and its preparation technology. Background technique [0002] With the rapid development of China's urbanization process, the amount of sewage generated has increased sharply. At the same time, the government's requirements for environmental protection have become increasingly stringent, leading to the expansion of the scale and volume of sewage treatment, and the amount of sludge generated must increase rapidly. Sludge treatment costs basically account for about a quarter to half of the entire sewage plant. Over the years, sludge treatment and disposal have not received enough attention. Currently, more than 60% of sludge is disposed of in landfill. The water cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 付英王景芝
Owner UNIV OF JINAN
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