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Treatment agent for heavy metal wastewater and preparation method thereof

A technology for wastewater treatment and heavy metals, applied in water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of high cost of raw materials, improve utilization rate, strong adsorption capacity, and avoid environmental pollution Effect

Inactive Publication Date: 2020-11-27
NANNING XIAYANG CHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the defect of high raw material cost existing in the existing aluminum salt heavy metal wastewater treatment agents, the present invention provides a heavy metal wastewater treatment agent which makes full use of fly ash waste to prepare a heavy metal wastewater treatment agent with good heavy metal adsorption effect

Method used

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  • Treatment agent for heavy metal wastewater and preparation method thereof
  • Treatment agent for heavy metal wastewater and preparation method thereof
  • Treatment agent for heavy metal wastewater and preparation method thereof

Examples

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Effect test

Embodiment 1

[0022] A heavy metal wastewater treatment agent is composed of calcium oxide, magnesium oxide, sodium carbonate, calcium hypochlorite, kaolin and fly ash.

[0023] The preparation method of described heavy metal wastewater treatment agent, comprises the following steps:

[0024] (1) Take calcium oxide and grind it through a 200-mesh sieve, mix it with fly ash, kaolin, and sodium carbonate at a mass ratio of 2.5:75:6:3, and stir mechanically at 100r / min for 30min to obtain material A;

[0025] (2) Mix material A with hot water at 55°C at a solid-to-liquid ratio of 50:15, and mix it with 700r / min mechanical stirring for 5 minutes, then add 20% hypochlorous acid of the mass of fly ash Calcium, 3% magnesium oxide, continue to stir for 1min, obtain material B;

[0026] (3) Inject material B into a ceramsite mold at 0.5MPa for granulation, then place the granules at a constant temperature of 55°C for 5 hours, and then move them into a stainless steel reactor with a polytetrafluoroe...

Embodiment 2

[0028] A heavy metal wastewater treatment agent is composed of calcium oxide, magnesium oxide, sodium carbonate, calcium hypochlorite, kaolin and fly ash.

[0029] The preparation method of described heavy metal wastewater treatment agent, comprises the following steps:

[0030] (1) Take calcium oxide and grind it through a 200-mesh sieve, mix it with fly ash, kaolin, and sodium carbonate in a mass ratio of 7.5:80:9):(3-8), and stir mechanically at 100-200r / min 30min, obtain material A;

[0031] (2) Mix material A with hot water at 55-65°C at a solid-to-liquid ratio of 50: (15-16), and mix it with 700-800r / min mechanical stirring for 5 minutes, then add fly ash 20% to 25% of the mass of calcium hypochlorite, 3% to 7.5% of magnesium oxide, and continue to stir for 1min to obtain material B;

[0032] (3) Inject material B into a ceramsite mold at 0.5 MPa to granulate, then place the granules at a constant temperature of 55-65°C for 5-6 hours, and then move them into a stainles...

Embodiment 3

[0034] A heavy metal wastewater treatment agent is composed of calcium oxide, magnesium oxide, sodium carbonate, calcium hypochlorite, kaolin and fly ash.

[0035] The preparation method of described heavy metal wastewater treatment agent, comprises the following steps:

[0036] (1) Take calcium oxide and grind it through a 200-mesh sieve, mix it with fly ash, kaolin, and sodium carbonate at a mass ratio of 5:75:7.5:5, and stir mechanically at 100-200r / min for 30 minutes to obtain material A ;

[0037] (2) Mix material A with hot water at 60°C at a solid-to-liquid ratio of 50:15.5, and mix it with 750r / min mechanical stirring for 5 minutes, then add 23% hypochlorous acid of fly ash mass Calcium, 5% magnesium oxide, continue to stir for 1min, obtain material B;

[0038] (3) Inject material B into a ceramsite mold at 0.5 MPa to granulate, then place the granules at a constant temperature of 60°C for 6 hours, and then move them into a stainless steel reactor with a polytetraflu...

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Abstract

The invention provides a treatment agent for heavy metal wastewater and a preparation method thereof. The agent is composed of calcium oxide, magnesium oxide, sodium carbonate, calcium hypochlorite, kaolin and fly ash. According to the invention, industrial waste, namely the fly ash is used as a raw material and is subjected to synthesis of ceramsite through an alkali fusion method, and then the ceramsite is subjected to hydrothermal synthesis in virtue of a hydrothermal synthesis method so as to obtain the treatment agent for heavy metal wastewater, so the situation that environmental pollution caused by independent usage of fly ash residues is avoided and the defects of a powdery treatment agent are overcome. The treatment agent prepared by the invention is spherical; a large number of open or closed tiny air holes are formed inside the treatment agent or on the surface of the treatment agent, and the pore diameters of the air holes are generally micron-sized or sub-micron-sized; dueto the porous solid surface characteristics, the prepared treatment agent has a very large inner surface, namely very large surface energy, so the treatment agent has relatively strong adsorption capacity, and the adsorbability of the treatment agent can be used for removing all solid and colloidal particles in a micron level or above in sewage; and the treatment agent has the advantages of beinggood in purification effect, capable of being repeatedly utilized and the like.

Description

technical field [0001] The invention belongs to the technical field of heavy metal wastewater treatment, and in particular relates to a heavy metal wastewater treatment agent and a preparation method thereof. Background technique [0002] With the development of industry, heavy metal pollution has become one of the only reasons for environmental pollution. Chemical flocculation is an important sewage treatment method, which has the characteristics of less infrastructure investment, simple process, easy operation, and low energy consumption. Aluminum salt coagulation The amount of coagulant used in water treatment is small, and the amount of sludge generated is small. It is the most widely used coagulant in my country. At present, my country's alumina is mainly extracted from bauxite resources. With the gradual depletion of high-quality bauxite reserves and the increasing domestic demand for alumina, high-alumina fly ash has become a potential source of alumina extraction. A ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/62C04B28/02C02F101/20
CPCC02F1/62C04B28/021C02F2101/20C04B22/064C04B18/08C04B14/106C04B22/10C04B22/002C04B22/124C04B22/066
Inventor 韦明
Owner NANNING XIAYANG CHEM TECH CO LTD