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Efficient water treatment flocculant and preparation method thereof

A technology for water treatment and flocculant, which is applied in water/sewage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. Achieve sustainable development, improve flocculation effect and reduce energy consumption

Pending Publication Date: 2022-01-07
上海成宙化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the related technologies mentioned above, the inventors found that the flocculation effect of inorganic polymer flocculants still needs to be improved

Method used

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  • Efficient water treatment flocculant and preparation method thereof
  • Efficient water treatment flocculant and preparation method thereof
  • Efficient water treatment flocculant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045]A high-efficiency water treatment flocculant, which is composed of polyaluminum chloride and polysilicic acid, and its preparation method is as follows:

[0046] S1, add polyaluminum chloride to polysilicate, stir at 20°C for 10 minutes, then raise the temperature to 26°C, and continue stirring for 8 minutes to obtain a premix;

[0047] S2, aging the premixed solution at 30° C. for 5 hours to obtain.

[0048] It has been determined that in the high-efficiency water treatment flocculant prepared in this example, Al:Si=0.5:1 calculated by molar ratio.

[0049] In this embodiment, polyaluminum chloride is commercially available liquid polyaluminum chloride, Al 2 o 3 The content is 10%;

[0050] Polysilicic acid is a commercially available polysilicic acid flocculant, SiO 2 The content is 2.5%.

Embodiment 2-5

[0052] A high-efficiency water treatment flocculant differs from Example 1 in that the molar ratio of Al and Si in the high-efficiency water treatment flocculant is different, as shown in Table 1 for details.

Embodiment 6

[0069] A high-efficiency water treatment flocculant, the difference from Example 3 is that both polyaluminum chloride and polysilicic acid are self-made.

[0070] The preparation method of polyaluminum chloride is as follows: mix aluminum foil acid and calcium aluminate powder at a weight ratio of 4:1, and stir and mix evenly at 90°C to obtain the product.

[0071] After measurement, the salinity of the polyaluminum chloride prepared in this embodiment is 50.70%, Al 2 o 3 The content is 10.09%.

[0072] The preparation method of polysilicic acid is: mix sodium silicate and deionized water to obtain a mixed solution, and control the SiO in the mixed solution 2 content of 2%, then add hydrochloric acid with a mass concentration of 5% to adjust the pH to 4, and keep the temperature at 20°C for 30 minutes to obtain the product.

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Abstract

The invention relates to the technical field of sewage treatment, and particularly discloses an efficient water treatment flocculant and a preparation method thereof. The efficient water treatment flocculant is formed by mixing polyaluminum chloride and polysilicic acid, wherein the molar ratio of Al to Si is (0.5-3): 1. The preparation method comprises the following steps: adding polyaluminum chloride into polysilicic acid, stirring at 18-22 DEG C for 8-12 minutes, heating to 26-28 DEG C, and continuously stirring for 5-10 minutes to obtain a premixed solution; and aging the premixed solution at a temperature of 30-35 DEG C for 2-5 hours to obtain the product. The efficient water treatment flocculant disclosed by the invention has relatively high oil removal rate and COD removal rate, and is good in flocculation effect.

Description

technical field [0001] The application relates to the field of sewage treatment, more specifically, it relates to a high-efficiency water treatment flocculant and a preparation method thereof. Background technique [0002] According to its chemical composition, flocculants can be divided into inorganic flocculants and organic flocculants. Inorganic flocculants include inorganic flocculants and inorganic polymer flocculants. Since the appearance of inorganic polymer flocculants, they have been researched, produced and applied to varying degrees in many countries. [0003] The Chinese patent with the publication number CN103833060A and the publication date of June 4, 2014 discloses a production method of polyaluminum chloride, and the COD removal rate of the prepared polyaluminum chloride is up to 68.9%. The publication number is CN104761002A, and the Chinese patent published on July 8, 2015 discloses a preparation process of modified polyferric sulfate, and the COD removal r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
CPCC02F1/5236
Inventor 乐剑辉金玉贇陶敏健
Owner 上海成宙化工有限公司
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