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Chlorine dioxide catalytically-oxidizing apparatus used for waste water treatment

A chlorine dioxide catalytic oxidation tower and chlorine dioxide technology are applied in water/sewage treatment, flotation water/sewage treatment, special compound water treatment, etc. It can improve the contact efficiency, enhance the catalytic oxidation effect, and achieve the effect of safe operation.

Inactive Publication Date: 2016-03-23
JILIN DESIGNING INST OF CNPC NORTHEAST REFINING & CHEM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For high-concentration refractory wastewater, the current main oxidation processes include Fenton oxidation, ozone oxidation, etc., but there are disadvantages such as high equipment operating costs and large investment costs, which restrict its application in industrial wastewater treatment.

Method used

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  • Chlorine dioxide catalytically-oxidizing apparatus used for waste water treatment
  • Chlorine dioxide catalytically-oxidizing apparatus used for waste water treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The chemical oxygen demand (COD) that is used to produce purified terephthalic acid (PTA) workshop is the waste water of 4200mg / L, is processed with the chlorine dioxide catalytic oxidation device of the present invention, and use volume ratio is 0.5% dichloride in the treatment. Chlorine oxide aqueous solution (concentration is 500mg / L), in the aeration treatment, the volume ratio of air to wastewater is 105:1 to 110:1, pH=5~6, and the residence time of wastewater in the catalytic oxidation tower is kept at 60min. The COD of the final wastewater is reduced to 450mg / L, which enhances the biodegradability of the wastewater, and after aeration treatment reaches the standard, it enters the next-level biochemical treatment system.

Embodiment 2

[0026] Refinery oily wastewater, wastewater COD=5100mg / L, oily 80mg / L, through the chlorine dioxide catalytic oxidation device, is processed with the chlorine dioxide catalytic oxidation device of the present invention, and the volume ratio used in the treatment is 15% chlorine dioxide Aqueous solution (concentration is 1000mg / L), in the aeration treatment, the volume ratio of air and waste water is 105-110:1, pH=6-7, keep the residence time of waste water in the catalytic oxidation tower as 90min, the treated waste water The COD is reduced to 420mg / L, and the oil content is 10mg / L, which enhances the biodegradability of the wastewater, and after aeration treatment reaches the standard, it enters the next-level biochemical treatment system.

Embodiment 3

[0028] Acidic dark green B printing and dyeing wastewater, wastewater COD=850mg / L, is processed through the chlorine dioxide catalytic oxidation device of the present invention, and the dosing volume ratio is 0.8% chlorine dioxide aqueous solution (concentration is 800mg / L), in aeration treatment In the process, the volume ratio of air to waste water is 105-110:1, pH=5, and the residence time of waste water in the catalytic oxidation tower is kept at 45 minutes. The COD of the treated waste water is reduced to 200 mg / L, and after aeration treatment reaches the standard, it enters The next-level biochemical treatment system enhances the biodegradability of wastewater, and after aeration treatment, it enters the next-level biochemical treatment system after reaching the standard.

[0029] As can be seen from the foregoing examples, the chlorine dioxide catalytic oxidation device of the present invention can significantly reduce the COD value in the wastewater after treatment, so ...

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Abstract

The invention discloses a chlorine dioxide catalytically-oxidizing apparatus used for waste water treatment. The apparatus includes: a chlorine dioxide generation apparatus, a chlorine dioxide absorption apparatus being connected thereto, a sewage-intercepting security device, and a chlorine dioxide catalytically-oxidizing column. Chlorine dioxide generated in the chlorine dioxide generation apparatus is absorbed by means of the chlorine dioxide absorption apparatus to obtain a chlorine dioxide water solution. The chlorine dioxide water solution and waste water, which passes through the sewage-intercepting security device, are both fed into the chlorine dioxide catalytically-oxidizing column for later treatment. In the chlorine dioxide catalytically-oxidizing apparatus, a catalyst can enhance the catalytically-oxidizing effect of the chlorine dioxide, an aeration apparatus can increase contact efficiency between the chlorine dioxide and the waste water. Aeration and reaction exist together, so that oxidizing effects is improved and dechlorination is carried out at the same time, thereby achieving safe operation of the apparatus. Waste water is improved in biodegradability after being treated through the apparatus.

Description

technical field [0001] The invention relates to the field of waste water treatment, in particular to a chlorine dioxide catalytic oxidation device for waste water treatment. Background technique [0002] If high-concentration refractory industrial wastewater is not properly treated, it will cause water environmental safety accidents, especially in today's increasingly tense water resources, which will seriously threaten human health and the living environment. [0003] At present, the biodegradability of high-concentration and refractory industrial wastewater puts great pressure on subsequent biochemical treatment. Therefore, the treatment of high-concentration and refractory industrial wastewater has attracted more and more attention, especially the implementation of the new environmental protection law , making enterprises pay more and more attention to the above-mentioned industrial wastewater treatment. For high-concentration refractory wastewater, the current main oxid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/76C02F1/24
CPCC02F1/725C02F1/24C02F1/763C02F2305/02
Inventor 邵志国胡良王利刚李向伟严生虎陈代祥
Owner JILIN DESIGNING INST OF CNPC NORTHEAST REFINING & CHEM ENG
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