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Chlorine dioxide mixed oxidation method for treating aminophenol dye wastewater

A technology for dye wastewater and chlorine dioxide, which is used in oxidation water/sewage treatment, chemical instruments and methods, precipitation treatment, etc., can solve problems such as poor stability, and achieve the effects of high stability, low treatment cost, and long oxidation time.

Active Publication Date: 2020-08-18
EASTERN LIAONING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It overcomes the problem of poor stability of chlorine dioxide and chlorine gas generated by the reaction of sodium chlorate and hydrochloric acid in aminophenol dye wastewater, improves the COD removal rate of aminophenol dye wastewater, and reduces the cost of aminophenol wastewater treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A kind of raw material of chlorine dioxide mixed oxidation process treatment medium black 2B dye waste water: sodium chlorate 2.0kg, active magnesium oxide 0.4kg, dissolve and disperse in 8.0kg water, prepare dispersion liquid; 35% (m / m) concentrated hydrochloric acid 4.0kg spare.

[0043] Put 1000kg of media black 2B dye waste water into the pipeline reactor with a jet pump, and spray it circularly;

[0044] The above dispersion liquid and concentrated hydrochloric acid are pumped into the chlorine dioxide generator according to the mass ratio of dispersion liquid: concentrated hydrochloric acid 2.6:1 with a metering pump, and the generated chlorine dioxide, magnesium hypochlorite oxidant and magnesium chloride are sucked into the pipeline by the injector In the type reactor, the injection is circulated, the oxidation reaction is 4 hours, and the COD of the wastewater is 1000mg / l. Then put the waste water into the sedimentation tank for 24 hours, and then transfer the...

Embodiment 2

[0047] A kind of raw material of chlorine dioxide mixed oxidation process treatment media black 2B dye waste water: sodium chlorate 2.0kg, activated calcium oxide 0.6kg, dissolve and disperse in 8.0 water, prepare dispersion liquid; 35% (m / m) concentrated hydrochloric acid 4.0 kg spare.

[0048] Put 1000kg of media black 2B dye waste water into the pipeline reactor with a jet pump, and spray it circularly;

[0049] Use a metering pump to inject the above raw materials into the chlorine dioxide generator according to the mass ratio of dispersion liquid:concentrated hydrochloric acid 2.65:1, and the generated chlorine dioxide, calcium hypochlorite oxidant and calcium chloride are sucked into the injector for pipeline reaction In the tank, spray circularly, oxidize for 4 hours, and the COD of the wastewater is 1000mg / L, then put the wastewater into the sedimentation tank for 24 hours, and then transfer the supernatant to the biochemical treatment tank for biochemical treatment. ...

Embodiment 3

[0051] A kind of chlorine dioxide mixed oxidation process the raw material of aminophenol dye wastewater: 4kg of sodium chlorate, 0.8kg of active magnesium oxide, dissolve and disperse in 16kg of water, 8kg of the concentrated hydrochloric acid of 35% (m / m).

[0052] Put 1000kg of aminophenol dye waste water into the pipeline reactor with a jet pump, and spray it circularly;

[0053] Use a metering pump to pump the above raw materials into the chlorine dioxide generator, and the generated chlorine dioxide and magnesium hypochlorite oxidant are sucked into the pipeline reactor by the injector, sprayed circularly, and oxidized for 3 hours, and the COD of the wastewater is 1000mg / l . Then put the waste water into the sedimentation tank for 24 hours, and then transfer the supernatant to the biochemical treatment tank for biochemical treatment.

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Abstract

The invention relates to a treatment method for aminophenol dyeing waste water by using a chlorine dioxide mixed oxidation method. The treatment method comprises the following steps of (1) treating raw materials, wherein 2.0-4.0 kg sodium chlorate and 0.4-0.8 kg active magnesium oxide and / or active calcium oxide are diffused into 8.0-16 kg water to prepare a diffusion solution, and 4.0-8 kg concentrated hydrochloric acid is needed; (2) injecting 1000 kg aminophenol dyeing waste water into a pipeline reactor by adopting an injection pump in a cycle mode; (3) injecting the diffusion solution and the concentrated hydrochloric acid into a chlorine dioxide generator, blending the above materials, sucking the obtained mixture into the pipeline reactor through an injector, injecting the mixture into the reactor in the cycle mode, and obtaining treated waste water after an oxidation reaction of 3-4 hours. Since the degradation of chlorine dioxide which is obtained according to the treatment method for aminophenol dyeing waste water by using a chlorine dioxide mixed oxidation method is inhibited in the presence of magnesium hypochlorite in the slightly alkaline water, the duration of the oxidation reaction is prolonged, and meanwhile magnesium hypochlorite can continuously oxidize part of organic substances in the aminophenol dyeing waste water while bivalent magnesium ions can conduct flocculation treatment on the aminophenol dyeing waste water.

Description

Technical field: [0001] The invention relates to a chlorine dioxide mixed oxidation method for treating aminophenol dye wastewater. Background technique: [0002] The impurity content of industrial wastewater varies widely, and no one method is omnipotent. Different methods should be applied to different wastewater, especially when the environmental load far exceeds the self-purification ability of the environment today, it seems that specific and targeted treatment of wastewater is necessary. very important. The waste water mainly treated by the present invention is the aminophenol dye waste water in the dye industry production, especially refers to the mordant black 2B dye production waste water. [0003] The color of the dye is closely related to its structure. In the conjugated double bond system, as the conjugated double bond grows, the activity of the π electron increases, and the wavelength of the absorbed light becomes longer, resulting in a dark effect; in the conj...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/76C02F1/52C02F9/14C02F101/34C02F101/38
CPCC02F1/5236C02F1/5245C02F1/76C02F3/00C02F9/00C02F2001/007C02F2101/308C02F2101/345C02F2101/38
Inventor 张兆群刘飞韩涛叶桂军
Owner EASTERN LIAONING UNIV
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