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High-molecular organic-inorganic composite chemical for processing incineration fly ash and application thereof

An inorganic composite and polymer technology, which is applied in the field of polymer organic-inorganic composite agents for processing incineration fly ash, can solve the problems of large influence on curing efficiency, high cement consumption, poor curing effect, etc., and achieve low cost and high efficiency. Good, the effect of reducing the amount of addition

Active Publication Date: 2014-05-28
南京卓越环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the commonly used incineration fly ash treatment methods include cement solidification, chemical solidification, melting solidification, etc. Among them, cement solidification and chemical solidification are more commonly used. The equipment and operation requirements required for cement solidification are relatively simple, but the capacity increase ratio after cement solidification Large, high cement consumption, a large amount of cement means resource consumption and indirect environmental pollution; chemical agents are generally divided into inorganic agents or organic agents, inorganic agents are mainly sodium sulfide, phosphate and ferrite agents, organic chemical agents Mainly organic chelating agents
Chemical agent stabilization technology has a good development prospect because of its large capacity reduction and good treatment effect, but its high operating cost limits its application area; the cost of inorganic chemical agent treatment may be low, but the curing effect is poor. And its curing efficiency is greatly affected by the acidic conditions of the system

Method used

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  • High-molecular organic-inorganic composite chemical for processing incineration fly ash and application thereof
  • High-molecular organic-inorganic composite chemical for processing incineration fly ash and application thereof
  • High-molecular organic-inorganic composite chemical for processing incineration fly ash and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0056] A polymer organic-inorganic composite agent, the preparation method of which comprises the following steps:

[0057] 1) Inject 260.4g of deionized water into the reaction flask with a stirring and heating device, heat the water in the system to boil, and then add 0.2mol (14.2g) of acrylamide, 1mol (116g) of hydroxyethyl acrylate and 1.3g of azobisisobutyronitrile mixture is added dropwise to it, and it takes about 3 hours to complete the dropwise addition while maintaining stirring, and then continue to stir and keep warm for 2 hours, and the obtained product is an oligomer with hydroxyl and amide groups Aqueous solution, that is, an aqueous solution of polyhydroxyacrylamide with a molecular weight of 5,000 to 20,000;

[0058] 2) Control the temperature of the above polyhydroxyacrylamide solution at about 50°C, add 20% sulfuric acid solution (390.6g) into it and stir evenly so that the pH value is between 1 and 3, then add 1mol (92.9g ) epichlorohydrin, stirring while ...

Embodiment 2

[0064] A polymer organic-inorganic composite agent, the preparation method of which comprises the following steps:

[0065] 1) Inject 253.3g of deionized water into the reaction flask with a stirring and heating device, heat the water in the system to boil, then add 0.15mol (10.65g) of acrylamide, 1mol (116g) of hydroxyethyl acrylate and 1.26g of azobisisobutyronitrile mixture was added dropwise to it, and it took about 3 hours to complete the dropwise addition while maintaining stirring, and then continued to stir and keep warm for 2 hours, and the obtained product was an oligomer with hydroxyl and amide groups Aqueous solution, that is, an aqueous solution of polyhydroxyacrylamide with a molecular weight of 5,000 to 20,000;

[0066] 2) Control the temperature of the above polyhydroxyacrylamide solution at about 50°C, add 30% sulfuric acid solution (253.3g) into it and stir evenly so that the pH value is between 1 and 3, then add 1.5mol (139.35g) dropwise to it g) Epichloroh...

Embodiment 3

[0072] A polymer organic-inorganic composite agent, the preparation method of which comprises the following steps:

[0073] 1) Mix 0.2mol (14.2g) of acrylamide, hydroxypropyl acrylate and benzoyl peroxide, and add the mixture dropwise into a reaction kettle filled with water at 95-100°C while stirring continuously. After the dropwise addition, stir at constant temperature for 1.5 hours to complete the reaction and obtain an aqueous solution of polyhydroxyacrylamide with a molecular weight of 5,000 to 20,000;

[0074] Among them, the amount of hydroxypropyl acrylate is 5 times that of acrylamide, the amount of benzoyl peroxide is 0.5% of the total mass of hydroxypropyl acrylate and acrylamide, and the amount of water is 0.5% of the total mass of hydroxypropyl acrylate and acrylamide. 1.5 times;

[0075] 2) Control the temperature of the above-mentioned polyhydroxyacrylamide solution at 45-65°C, adjust the pH value to 3 with sulfuric acid, and add epichlorohydrin dropwise while...

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Abstract

The invention discloses a high-molecular organic-inorganic composite chemical for processing incineration fly ash and an application thereof. An organic substance part of the composite chemical is a high-molecular metal ion chelating agent composed of acrylamide, hydroxyl acrylic acid, chloropropylene oxide, an amines and carbon disulfide through polymerization, and an inorganic substance part is mainly composed of composite phosphate. According to the invention, functional groups of polyacrylamide and dithio amino are integrated in the composite chemical, the composite chemical has dual efficacy for chelating and flocculating heavy metal ions, and the capability of chelating metal ions in the fly ash can be obviously increased by compounding with inorganic salt; 18mL of the composite chemical is added in each kilogram of fly ash to reach the treatment requirement of fly ash under a new standard; compared with pure organic chemical, the production cost is greatly reduced, the preparation method is simple, the raw material has the advantages of low cost, and easy acquisition, and the high-molecular organic-inorganic composite chemical is in favor of popularization and application.

Description

technical field [0001] The invention belongs to the field of solid waste treatment and disposal in environmental protection, and relates to a compound medicine for stabilizing treatment of metal ions in incineration fly ash, in particular to a polymer organic-inorganic compound medicine for treating incineration fly ash and its application. Background technique [0002] Environmental protection has long been a basic national policy of our country. With the increasing requirements for environmental protection, many waste incineration stations have been established all over the country to deal with the rapidly increasing industrial waste and domestic waste. The fly ash produced by waste incineration is a dangerous waste, because it contains heavy metals such as lead, chromium, cadmium, mercury and other persistent organic pollution sources such as carcinogens, which are harmful to human health and the environment. Therefore, proper disposal of fly ash is of great significanc...

Claims

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Application Information

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IPC IPC(8): C04B24/32C08F220/56C08F220/58C08F8/00C08F8/32C08F8/34
Inventor 伍海斌
Owner 南京卓越环保科技有限公司
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