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Inorganic-organic composite polymer phosphorus removal flocculating agent and preparation method thereof

A composite polymer and flocculant technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water pollutants, etc., can solve the problems of efficient removal of phosphorus in wastewater, achieve large molecular weight, reduce turbidity, The effect of fast settling speed

Active Publication Date: 2019-04-02
西安瑞华能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the commonly used inorganic-organic composite flocculants are mainly used to remove suspended solids, and it is difficult to efficiently remove phosphorus in wastewater at the same time.

Method used

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  • Inorganic-organic composite polymer phosphorus removal flocculating agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Take 10g of polyaluminum chloride with a balance, dissolve it in 200mL of distilled water, and make an aqueous solution with a mass concentration of 5%, then add 2g of silane coupling agent 3-(methacryloyloxy)propyltrimethoxysilane, in The reaction was stirred at room temperature for 4 hours. Then add 16g of acrylamide, 8g of 2-acrylamide-2-methylpropanesulfonic acid and 2g of urea, after the polymer monomer is fully stirred and dissolved, adjust the pH to 7.0 with 0.1mol / L hydrochloric acid, and pass nitrogen gas Deoxidize for 15 minutes, heat up to 55-60°C, add 2 mL of 10% initiator ammonium persulfate solution dropwise under stirring, and react at constant temperature for 4 hours to obtain the target product. The average molecular weight of the target product is measured to be 5.5 million. The target product is granulated and dried to obtain an inorganic-organic composite polymer phosphorus removal flocculant.

Embodiment 2

[0022] Take 10g of polyaluminum chloride with a balance, dissolve it in 200mL of distilled water, and make an aqueous solution with a mass concentration of 5%, then add 2.6g of silane coupling agent 3-(methacryloyloxy)propyltrimethoxysilane, The reaction was stirred at room temperature for 5 hours. Then add 25g of acrylamide, 8.4g of 2-acrylamide-2-methylpropanesulfonic acid and 2.1g of urea, after the polymer monomer is fully stirred and dissolved, adjust the pH to 7.0 with 0.1mol / L hydrochloric acid, and Nitrogen was used to remove oxygen for 15 minutes, the temperature was raised to 60-65°C, 4.8mL of 10% initiator ammonium persulfate solution was added dropwise under stirring, and the target product was obtained after constant temperature reaction for 4.5 hours. The average molecular weight of the target product was measured to be 7 million. The target product is granulated and dried to obtain an inorganic-organic composite polymer phosphorus removal flocculant.

Embodiment 3

[0024] Take 10g of polyaluminum chloride with a balance, dissolve it in 200mL of distilled water, and make an aqueous solution with a mass concentration of 5%, then add 3.2g of silane coupling agent 3-(methacryloyloxy)propyltrimethoxysilane, The reaction was stirred at room temperature for 6 hours. Then add 32.5g of acrylamide, 8.8g of 2-acrylamide-2-methylpropanesulfonic acid and 2.2g of urea, and adjust the pH to 7.0 with 0.1mol / L hydrochloric acid after the polymer monomer is fully stirred and dissolved. And pass nitrogen gas to remove oxygen for 15 minutes, heat up to 60-65 °C, add 5.6 mL of 10% initiator ammonium persulfate solution dropwise under stirring, and react at constant temperature for 4.5 hours to obtain the target product, and the average molecular weight of the target product is measured to be 9.5 million . The target product is granulated and dried to obtain an inorganic-organic composite polymer phosphorus removal flocculant.

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Abstract

The invention relates to an inorganic-organic composite polymer phosphorus removal flocculating agent and a preparation method thereof. The preparation method comprises: hydroxyl polyaluminum modifying, monomer polymerization reaction, and finished product preparation. According to the present invention, The inorganic-organic composite polymer phosphorus removal flocculating agent has advantages of high molecular weight, stable performance, particularly strong turbidity reducing ability and particularly rapid sedimentation, is suitable for use after biochemical reactions, integrates the high-density positive charges of the inorganic flocculating agent and the high molecular weight of the organic flocculating agent, and can efficiently remove phosphorus from wastewater while performs flocculating treatment on sewage, wherein the removal rates of suspended solids and phosphorus from urban and oilfield wastewater and sewage respectively reach 97.8% and 98.6%.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to an inorganic-organic composite macromolecule phosphorus-removing flocculant and a preparation method thereof. Background technique [0002] Phosphorus is not only a non-renewable resource, but also an important cause of eutrophication in water bodies. In order to prevent eutrophication of water bodies, the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002) raised the level-1 A effluent phosphorus standard from phosphate to total phosphorus (0.50mg / L). In 2018, many areas began to improve the standard again, and the total phosphorus should be reduced to below 0.3mg / L, reaching the level IV of the surface water. Therefore, the situation of research and development of wastewater phosphorus removal process is very urgent. [0003] At present, the commonly used phosphorus removal processes mainly include biological methods and chemical methods...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F1/56C02F101/10
CPCC02F1/5245C02F1/56C02F2101/105
Inventor 武志远张群正柯从玉孙妩娟童梦凡
Owner 西安瑞华能源科技有限公司
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