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High-performance inorganic polymeric flocculant as well as preparation method and application thereof

An inorganic polymer and flocculant technology, which is applied in the field of industrial waste resource utilization, can solve the problems of meeting performance requirements, large flocculant dosage, large chemical reagent consumption, etc., and achieves a wide range of raw material sources and a pH applicable range Wide and simple operation process

Inactive Publication Date: 2020-01-17
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, for the waste liquid that contains a variety of high-concentration pollutants and requires color removal, it is difficult for the existing polysilicon-based flocculants on the market to meet the requirements in terms of performance.
In the process of use, there are problems such as excessive flocculant dosage, poor flocculation and removal effect of pollutants, great influence of flocculant performance by pH changes of water body, and insignificant removal of turbidity and chromaticity of waste liquid, etc.
At the same time, in the preparation process of these inorganic polysilicon-based flocculants, it is usually necessary to add additional chemical reagents such as silicon, aluminum, titanium, iron, magnesium, etc., the amount of chemical reagents is large, and the flocculant preparation cycle is long

Method used

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  • High-performance inorganic polymeric flocculant as well as preparation method and application thereof
  • High-performance inorganic polymeric flocculant as well as preparation method and application thereof
  • High-performance inorganic polymeric flocculant as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1 The influence of the mass ratio of coal gangue powder and tuff powder on the removal of COD, total phosphorus, ammonia nitrogen, mercury ions, and chromaticity in waste liquid by the prepared polysilicon aluminum sulfate titanium magnesium flocculant

[0033] Preparation of flocculant: Grind tuff, coal gangue, high titanium slag, and boron-magnesium mud respectively, and pass through a 200-mesh sieve to obtain tuff powder, coal gangue powder, high-titanium slag powder, and boron-magnesium mud powder. According to mass ratio 0.1: 1, 0.15: 1, 0.18: 1, 0.2: 1, 0.5: 1, 0.8: 1, 0.85: 1, 0.90: 1, 1: 1, take coal gangue powder and tuff powder respectively, mix, Stir evenly to obtain nine groups of coagulated coal powder. Use 98% concentrated sulfuric acid to titrate distilled water to prepare a sulfuric acid solution with a pH of 2. Add the coagulated coal powder into the sulfuric acid solution according to the solid-liquid ratio of 1:1 g / mL, stir evenly, let stand ...

Embodiment 2

[0047] Example 2 Effect of mass ratio of high-titanium slag powder, boron-magnesium mud powder, and polysilicon coagulated coal slurry on the removal of COD, total phosphorus, ammonia nitrogen, mercury ions, and chromaticity in waste liquid by the prepared polysilicon aluminum titanium magnesium sulfate flocculant

[0048] Preparation of flocculant: Grind tuff, coal gangue, high titanium slag, and boron-magnesium mud respectively, and pass through a 200-mesh sieve to obtain tuff powder, coal gangue powder, high-titanium slag powder, and boron-magnesium mud powder. According to the mass ratio of 0.8:1, the coal gangue powder and the tuff powder are weighed, mixed, and evenly stirred to obtain the coagulated coal powder. Use 98% concentrated sulfuric acid to titrate distilled water to prepare a sulfuric acid solution with a pH of 2.5. Add the coagulated coal powder into the sulfuric acid solution according to the solid-liquid ratio of 1:1.5g / mL, stir evenly, let stand for 45 min...

Embodiment 3

[0055] Example 3 Effect of the pH of the alkalized aluminum-containing filtrate on the removal of COD, total phosphorus, ammonia nitrogen, mercury ions, and chromaticity in the waste liquid by the prepared polysilicon aluminum titanium magnesium sulfate flocculant

[0056] Preparation of flocculant: Grind tuff, coal gangue, high titanium slag, and boron-magnesium mud respectively, and pass through a 200-mesh sieve to obtain tuff powder, coal gangue powder, high-titanium slag powder, and boron-magnesium mud powder. According to the mass ratio of 0.8:1, the coal gangue powder and the tuff powder are weighed, mixed, and evenly stirred to obtain the coagulated coal powder. Use 98% concentrated sulfuric acid to titrate distilled water to prepare a sulfuric acid solution with a pH of 3. Add the coagulated coal powder into the sulfuric acid solution according to the solid-liquid ratio of 1:2 g / mL, stir evenly, let stand for 60 minutes, and separate the solid and liquid to obtain the ...

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Abstract

The invention discloses a high-performance inorganic polymer flocculant as well as a preparation method and application thereof. The preparation method comprises the following steps: weighing coal gangue powder and tuff powder, and uniformly mixing and stirring to obtain coagulated coal powder; adding the coagulated coal powder into a dilute acid solution, uniformly stirring, standing, and carrying out solid-liquid separation to obtain a coagulated coal slurry and an aluminum-containing filtrate; adding sulfuric acid into the coagulated coal slurry for titration, and aging to obtain a polysilicon coagulated coal slurry; weighing high-titanium slag powder, boron-magnesium mud powder and the polysilicon coagulated coal slurry, mixing, adding water, uniformly stirring, standing and ageing toobtain a flocculated slurry; dropwise adding a sodium hydroxide solution into the aluminum-containing filtrate to obtain an alkalized aluminum-containing filtrate; and mixing the alkalized aluminum-containing filtrate with the flocculation slurry, uniformly stirring, standing for aging, carrying out vacuum drying, and grinding to obtain the poly-silicon aluminum titanium magnesium sulfate flocculant. The flocculant prepared by the method is wide in pH application range, and can realize removal of 98% COD, 97% total phosphorus, 99% ammonia nitrogen, 98% mercury ion and 99% chroma in water bodyat most.

Description

technical field [0001] The invention relates to the technical field of resource utilization of industrial waste, in particular to a high-performance inorganic polymer flocculant and its preparation method and application. Background technique [0002] At present, the commonly used inorganic polysilicon-based flocculants mainly include: polysilicon ferrocoagulant, polysilicon aluminum sulfate flocculant, polysilicon aluminum chloride, polysilicon aluminum ferric sulfate, polysilicon aluminum zinc sulfate flocculant, polysilicon chloride Aluminum magnesium, polysilicon iron magnesium water purifying agent, polysilicon iron magnesium flocculant, etc. Generally speaking, inorganic polysilicon flocculants are developed on the basis of polysilicon aluminum flocculants and polysilicon ferric flocculants. [0003] In order to meet the specific needs of removing different pollutants in the actual application process of waste liquid disposal, the preparation of different polysilicon-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
CPCC02F1/5236
Inventor 黄涛宋东平刘万辉张树文周璐璐徐娇娇
Owner CHANGSHU INSTITUTE OF TECHNOLOGY