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Method for treating peroxide-containing wastewater with industrial waste gas

A technology for the production of waste water and industrial waste gas, applied in chemical instruments and methods, multi-stage water/sewage treatment, oxidized water/sewage treatment, etc. problem, to achieve the effect of reducing dosage, low fixed cost and reducing pharmaceutical cost

Active Publication Date: 2014-01-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One method does not include a biochemical treatment step. The disadvantage of this method is that ① hydrogen peroxide needs to be added in the catalytic oxidation step, and ② the effect of treating wastewater is not ideal. Usually, the treated wastewater needs to be diluted before it can be discharged.
The above two methods all need to add divalent iron salt as a catalyst in the catalytic oxidation step, the amount of divalent iron salt is relatively large, and the cost of the agent is relatively high

Method used

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  • Method for treating peroxide-containing wastewater with industrial waste gas
  • Method for treating peroxide-containing wastewater with industrial waste gas

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Experimental program
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Effect test

Embodiment 1

[0023] The hydrogen peroxide production wastewater of a chemical fiber factory is treated by the method of the above-mentioned preferred embodiment, the hydrogen peroxide content is 500mg / L, and the flow rate of the wastewater is 20m 3 / h, the residence time of wastewater in the grease trap is 30 minutes, the residence time in the air flotation tank is 10 minutes, the residence time of wastewater in the catalytic oxidation reactor is 240min, and the dosage of ferrous sulfate is 20mg / L, the superficial gas velocity of industrial waste gas in the catalytic oxidation reactor: 1500Nm 3 / (m 2 h). The test results are shown in Table 1.

Embodiment 2

[0030] The hydrogen peroxide wastewater of a hydrogen peroxide production plant is treated by the method of the above-mentioned preferred embodiment. The hydrogen peroxide content in the wastewater is 800mg / L, and the flow rate of the wastewater is 15m 3 / h, the residence time of wastewater in the grease trap is 60 minutes, the residence time in the air flotation tank is 20 minutes, the residence time of wastewater in the absorption reaction tank is 300min, and the dosage of ferrous sulfate is 50mg / L , the superficial gas velocity of the industrial waste gas passing into the absorption reactor is 2000Nm 3 / (m 2 h). The test results are shown in Table 2.

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Abstract

The invention relates to a method for treating peroxide-containing wastewater with an industrial waste gas. The method includes: treating the peroxide-containing wastewater by an oil separation tank and an air flotation tank; introducing the wastewater into a catalytic oxidation reactor equipped with a gas distributor at the bottom, adding a divalent iron salt into the wastewater, and introducing the industrial waste gas into the gas distributor for catalytic oxidation reaction; and bringing the wastewater undergoing the catalytic oxidation treatment into a biochemical treatment system. The industrial waste gas contains one or several of CO, SO2, NO and H2S, and the content of the peroxide in the peroxide-containing wastewater ist greater than 3mmol / L. Being simple and practical, the method of the invention not only can treat the peroxide-containing wastewater to meet discharge standards, but also can reduce the content of pollutants in the industrial waste gas.

Description

technical field [0001] The invention relates to a method for treating waste water produced by hydrogen peroxide with industrial waste gas. Background technique [0002] In the process of industrial production, a kind of wastewater containing peroxide is sometimes produced, the most common of which is wastewater containing hydrogen peroxide. As an important inorganic chemical product, hydrogen peroxide has a wide range of uses. As an oxidizing agent with good performance, hydrogen peroxide is an important raw material in industrial production. Many factories have built hydrogen peroxide production devices by taking advantage of their own products and resources. The industrial production of hydrogen peroxide is mainly divided into electrolysis method and anthraquinone method. The electrolysis method needs to consume a lot of electricity, the production cost is high, it is not suitable for large-scale industrial production, and has been gradually eliminated. The anthraquinon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/72
Inventor 高峰张莉桑军强
Owner CHINA PETROLEUM & CHEM CORP