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Preparation method of flocculant for heavy metal wastewater treatment

A technology of sewage treatment and flocculant, which is applied in water/sewage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. It can solve the problems of long sedimentation time, complicated production process and poor removal effect, etc. problem, to achieve the effect of increasing the relative molecular weight, improving the surface activity and enhancing the flocculation effect

Inactive Publication Date: 2016-02-10
合肥安奎思成套设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the flocculants used in sewage treatment plants to treat the above sewage pollutants take a long time to flocculate and settle, and the production process is complicated, the cost of the product is high, and the biological inhibitors, organic pollutants, nitrogen, phosphorus, etc. The removal effect is better, but the removal effect of heavy metal pollutants in sewage is poor, and it is easy to cause scaling

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of preparation method that the present invention proposes is used for heavy metal sewage treatment flocculant, comprises the following steps:

[0023] S1. After mixing 90 parts of lignin and water by weight, adjust the pH to 10, then add 45 parts of acetaldehyde and stir for 2 hours at a stirring speed of 160 rpm, then add 22 parts of triethylenetetramine, and heat up to 95 ° C. Heat preservation for 2.2h to obtain material A;

[0024] S2. Add 25 parts of sodium hydroxymethanesulfonate to 125 parts of material A in parts by weight to carry out sulfonation reaction. The temperature of sulfonation reaction is 98° C., keep warm for 2.3 hours, filter, and dry to obtain material B;

[0025] S3. Add 600 parts of isopropanol to 115 parts of material B by weight and mix evenly, heat up to 55°C, keep warm for 1.3h, then add 9 parts of 2,3-epoxypropyltrimethylammonium chloride, adjust pH to 10, followed by ultrasonic treatment, the time of ultrasonic treatment is 10min, t...

Embodiment 2

[0028] A kind of preparation method that the present invention proposes is used for heavy metal sewage treatment flocculant, comprises the following steps:

[0029] S1. After mixing 100 parts of lignin and water by weight, adjust the pH to 10, then add 35 parts of acetaldehyde and stir for 3 hours at a stirring speed of 120 rpm, then add 28 parts of triethylenetetramine, and heat up to 92 ° C. Heat preservation for 2.6h to obtain material A;

[0030] S2. Add 30 parts of sodium hydroxymethanesulfonate to 122 parts of material A in parts by weight to carry out sulfonation reaction. The temperature of sulfonation reaction is 95° C., keep warm for 2.8 hours, filter, and dry to obtain material B;

[0031] S3. Add 620 parts of isopropanol to 110 parts of material B by weight and mix evenly, heat up to 50°C, keep warm for 1.6h, then add 6 parts of 2,3-epoxypropyltrimethylammonium chloride, adjust pH to 10, followed by ultrasonic treatment, the time of ultrasonic treatment is 15min, ...

Embodiment 3

[0034] A kind of preparation method that the present invention proposes is used for heavy metal sewage treatment flocculant, comprises the following steps:

[0035] S1. After mixing 98 parts of lignin and water by weight, adjust the pH to 10, then add 38 parts of acetaldehyde and stir for 2.6 hours at a stirring speed of 130 rpm, then add 26 parts of triethylenetetramine and heat up to 93 °C , heat preservation for 2.5h to obtain material A;

[0036] S2. Add 28 parts of sodium hydroxymethanesulfonate to 123 parts of material A in parts by weight to carry out sulfonation reaction. The temperature of sulfonation reaction is 96° C., keep warm for 2.6 hours, filter, and dry to obtain material B;

[0037] S3. Add 615 parts of isopropanol to 112 parts of material B by weight and mix evenly, heat up to 52°C, keep warm for 1.5h, then add 7 parts of 2,3-epoxypropyltrimethylammonium chloride, adjust pH to 10, followed by ultrasonic treatment, the time of ultrasonic treatment is 13min, ...

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Abstract

The invention discloses a preparation method of a flocculant for heavy metal wastewater treatment. The preparation method comprises the following steps: mixing lignin with water, adjusting the pH value of the mixture I to be 10, adding ethanal for stirring, adding triethylene tetramine for heating, and then carrying out heat preservation to obtain a material A; adding a formaldehyde sodium bisulfite addition compound into the material A for a sulfonation reaction, and carrying out filtration and drying to obtain a material B; adding isopropyl alcohol into the material B for uniform mixing and heating, carrying out heat preservation, adding 2,3-epoxypropyltrimethylammonium chloride, adjusting the pH value of the mixture II to be 10, and then carrying out ultrasonic treatment, washing and drying to obtain a material C; mixing the material C, sodium aluminate, polymeric ferric sulfate, zinc nitrate and anionic polyacrylamide to obtain the flocculant. The flocculant obtained according to the preparation method is high in flocculability, has a good effect on removal of heavy metals, and can prevent scale formation.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a preparation method of a flocculant for heavy metal sewage treatment. Background technique [0002] The discharge of urban domestic sewage has caused serious environmental pollution. Due to the complexity of the wastewater components of various industrial and mining enterprises, the wastewater will contain a large number of biological inhibitors, organic pollutants, heavy metals, nitrogen, phosphorus and other substances. At present, the flocculants used in sewage treatment plants to treat the above sewage pollutants take a long time to flocculate and settle, and the production process is complicated, the cost of the product is high, and the biological inhibitors, organic pollutants, nitrogen, phosphorus, etc. The removal effect is better, but the removal effect of heavy metal pollutants in sewage is poor, and it is easy to cause scaling. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/62
Inventor 谢安全黄承大
Owner 合肥安奎思成套设备有限公司
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