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Method for treating washing wastewater by using composite-film modified sintered gangue ceramsite

A composite membrane, coal gangue technology, applied in the oxidation water/sewage treatment and other directions, can solve the problems of large amount of raw materials and poor chromaticity removal effect, achieve small amount of raw materials, overcome long photocatalytic oxidation time, and good removal effect. Effect

Inactive Publication Date: 2013-02-13
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to effectively solve the traditional catalytic method in the treatment of dinitrodiazophenol washing wastewater, a large amount of raw materials, poor color removal effect and other problems and proposed using TiO 2 / SiO 2 Coal gangue sintered ceramsite modified by composite membrane is used as a filling material, and ultraviolet light is used as a potential radiation source to excite the catalyst to generate holes and electron pairs, and its strong redox effect is used to control the production process of dinitrodiazophenol. Treatment of washing wastewater in

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0033] (1) TiO with coal gangue sintered ceramsite as carrier2 / SiO 2 Composite membrane preparation: the (NH 4 ) 2 TiF 6 , (NH 4 ) 2 SiF 6 Both are made into 0.1mol / L aqueous solution, H 3 BO 3 Prepare a 0.2mol / L aqueous solution, each take a certain volume of solution in the coating reactor and mix and stir evenly to obtain a homogeneous solution, so that in the homogeneous solution:

[0034] Molar ratio n((NH 4 ) 2 TiF 6 ):n((NH 4 ) 2 SiF 6 )=59:1;

[0035] Molar concentration ratio [c(H 3 BO 3 )]:[c(NH 4 ) 2 TiF 6 +c(NH 4 ) 2 SiF 6 ]=2:1.

[0036] Place the above-mentioned coating reactor with a certain volume of reaction solution in a constant temperature water bath at 80°C, and put in a certain amount of fired gangue ceramsite (according to the ratio of 100g of ceramsite with a particle size of 3mm~6mm in 250ml of reaction solution) Adding), under the condition of stirring, after constant temperature deposition for 5 hours, the ceramsite was taken ...

Embodiment 1

[0042] What this embodiment deals with is 10m 3 The dinitrodiazophenol washing wastewater: the pH of the original wastewater is 4, the color is 3250 times, and the COD is 317.99mg / L. Specifically, waste water treatment is carried out in the following ways:

[0043] TiO 2 / SiO 2 Composite membrane modified coal gangue sintered ceramsite was prepared according to the following method: (NH 4 ) 2 TiF 6 , (NH 4 ) 2 SiF 6 Both are made into 0.1mol / L aqueous solution, H 3 BO 3 Make 0.2mol / L aqueous solution, take 590ml (NH 4 ) 2 TiF 6 solution, 10ml (NH 4 ) 2 SiF 6 solution with 600mlH 3 BO 3 The solution was mixed and stirred evenly in the coating reactor to obtain a homogeneous solution. The above-mentioned reactor with the homogeneous solution was placed in a constant temperature water bath at 80°C, and 480g of fired coal gangue ceramsite with a particle size of 3mm~6mm was put in. Under the condition of stirring, the ceramsite was taken out after constant temper...

Embodiment 2

[0047] What this embodiment deals with is 15m 3 The dinitrodiazophenol washing wastewater: the pH of the original wastewater is 3.5, the color is 3500 times, and the COD is 330mg / L. Specifically, waste water treatment is carried out in the following ways:

[0048] TiO 2 / SiO 2 The preparation method of composite film modified coal gangue sintered ceramsite is the same as that of Example 1.

[0049] The TiO prepared by the above method 2 / SiO 2 Composite membrane modified coal gangue sintered ceramsite is filled in the photocatalytic device (filling ratio is 50%), and 15% sulfuric acid is used to adjust the pH of dinitrodiazophenol washing wastewater to 1, adding 105L of mass concentration to 30% H 2 o 2 At the same time, the air pump is used to aerate the photocatalytic device from the bottom, and the aeration volume is 0.6m 3 / h, the dinitrodiazophenol washing wastewater was oxidized for 1h (hydraulic retention time), the chroma and COD after treatment were 65 times a...

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Abstract

The invention discloses a method for treating washing wastewater by using composite-film modified sintered gangue ceramsite, belonging to the technical field of wastewater treatment in explosives industries. The method comprises the following steps: using the sintered gangue ceramsite modifiedx by using a TiO2 / SiO2 composite film as a filling substance; using ultraviolet as a potential radiation source; stimulating a catalyst to produce holes and duplets, and making use of the strong oxidation-reduction function to treat the washing wastewater produced in the dinitrodiazophenol production process. The method provided by the invention not only overcomes the problem of long photo-catalytic oxidation time of pure TiO2-modified ceramsite for treating the dinitrodiazophenol washing wastewater, but also has small dosage of raw materials compared with a traditional catalytic oxidation method, the chromaticity and the COD (chemical oxygen demand) have good removal effects; the effluent quality can meet the discharge requirement of Discharge Standard for Water Pollutants from Ordance Industry Ammunition Loading (GB14470.3-2002), the operation is rather concise, the reaction process cannot generate colored ions, and the effluent chromaticity is also reduced.

Description

technical field [0001] The invention belongs to the technical field of explosives industrial waste water treatment, in particular to a method using TiO 2 / SiO 2 A method for treating dinitrodiazophenol washing wastewater with a composite membrane. [0002] Background technique [0003] With the advancement of industry, the application of explosives is becoming more and more extensive, and the primer is an essential substance for detonating explosives. , good flame sensitivity, excellent detonation performance, high chemical safety, wide source of raw materials and low cost. It has been widely used as the primary explosive of industrial detonators. At the same time, dinitrodiazophenol is basically used in the civil explosive industry. As a detonator primer, but in the process of washing the production reactor of dinitrodiazophenol and washing workshop equipment and pipelines, a large amount of brown-red polluted wastewater containing toxic and harmful substances will be pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C04B41/85
Inventor 张文艺占明飞李仁霞郑泽鑫戴如娟
Owner CHANGZHOU UNIV
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