Method for treating 2,4-dichlorophenol wastewater by ozone oxidation in organic solvent

A technology of dichlorophenol and ozone oxidation, which is used in oxidation water/sewage treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc., can solve the problems of lack of selective oxidation, low ozone utilization rate, and many intermediate products. , to achieve the effect of large promotion and application value, low processing cost, and shortened response time

Active Publication Date: 2012-07-04
常熟紫金知识产权服务有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the problems of low solubility, poor stability, lack of selective oxidation, many intermediate products and low ozone utilization rate of ozone in the water phase (single phase), the present invention proposes an ozone oxidation treatment of 2,4-dioxide in an organic solvent. The method of chlorophenol wastewater can effectively and economically purify industrial organic pollutants and realize the method of industrial application of activated carbon capture-organic solvent elution and ozone oxidation treatment of 2,4-dichlorophenol wastewater

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  • Method for treating 2,4-dichlorophenol wastewater by ozone oxidation in organic solvent
  • Method for treating 2,4-dichlorophenol wastewater by ozone oxidation in organic solvent

Examples

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Embodiment 1

[0023] A commonly used activated carbon adsorption column (or tower) is used, and its device is connected to a solvent desorption system. The treated organic wastewater is 2,4-dichlorophenol wastewater, and the water volume is less than 20m 3 / d, the concentration is below 10mg / L, and the ozone generator is 3.0g / h. The wastewater containing 2,4-dichlorophenol is adsorbed in the activated carbon adsorption column, and the saturated activated carbon is desorbed / ozonated intermittently. After the saturated activated carbon is naturally drained by gravity, the acetone aqueous solution (containing less than 50% acetone, volume ratio) is used for external circulation desorption / ozone oxidation at the same time. Returning to the liquid storage tank, the tail gas containing residual ozone is fed into the activated carbon column being adsorbed through the pump, and is discharged into the atmosphere after complete adsorption-decomposition. Acetone aqueous solution and activated carbon...

Embodiment 2

[0025] A commonly used activated carbon adsorption column (or tower) is used, and its device is connected to a solvent desorption system. The treated organic wastewater is 2,4-dichlorophenol wastewater, and the water volume is less than 20m 3 / d, the concentration is below 100mg / L, and the ozone generator is 5.0g / h. The wastewater containing 2,4-dichlorophenol is adsorbed in the activated carbon adsorption column, and the saturated activated carbon is desorbed / ozonated intermittently. After the saturated activated carbon is naturally drained by gravity, the acetone aqueous solution (containing less than 50% acetone, volume ratio) is used for external circulation desorption / ozone oxidation at the same time. Returning to the liquid storage tank, the tail gas containing residual ozone is fed into the activated carbon column being adsorbed through the pump, and is discharged into the atmosphere after complete adsorption-decomposition. Acetone aqueous solution and activated carbon...

Embodiment 3

[0027] Use an ordinary activated carbon adsorption column (or tower), and its device is connected to a solvent desorption system. The organic wastewater to be treated is 2,4-dichlorophenol wastewater, and the water volume is greater than 20m 3 / d, the concentration is below 100mg / L, and the ozone generator is 8.0g / h. The wastewater containing 2,4-dichlorophenol is adsorbed in the activated carbon adsorption column, and the wastewater containing 2,4-dichlorophenol is continuously adsorbed by replacing the activated carbon column, and the saturated activated carbon is desorbed / ozone intermittently oxidation. After the saturated activated carbon is naturally drained by gravity, the acetone aqueous solution (containing less than 50% acetone, volume ratio) is used for external circulation desorption / ozone oxidation at the same time. Returning to the liquid storage tank, the tail gas containing residual ozone is fed into the activated carbon column being adsorbed through the pump,...

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Abstract

The invention discloses a method for treating 2,4-dichlorophenol wastewater by ozone oxidation in an organic solvent, and belongs to the field of organic wastewater treatment. Active carbon is used as an adsorbent in an adsorption column; extraction and enrichment are performed on the 2,4-dichlorophenol wastewater with concentration of less than 500mg / L; after the active carbon is adsorbed and saturated, natural gravity drainage is performed; and outer circulation desorption-ozone oxidation treatment is performed by adopting aqueous solution of acetone. The residual zone containing tail gas enters the active carbon column in adsorption treatment and is subjected to adsorption-decomposition treatment and then emitted to the atmosphere. The aqueous solution of the acetone and the active carbon can be recycled; and under the same conditions, compared with a traditional reaction system, the adding amount of ozone is reduced by over 1 / 2, the reaction time is shortened by over 2 / 3, the total removal rate of the 2,4-dichlorophenol reaches over 90 percent, and the quality of the discharged water is stable. The method has the advantage of efficient low-consumption treatment, and is convenient for operation in actual projects, easy to control and easy to realize industrialized production.

Description

technical field [0001] The invention relates to a method for treating 2,4-dichlorophenol wastewater, more specifically a method for treating 2,4-dichlorophenol wastewater by ozone oxidation in an organic solvent. Background technique [0002] With the acceleration of urbanization and industrialization in my country, the pollution of groundwater, surface water, and domestic water is becoming more and more serious. Water pollution and its prevention and control have become an important topic of widespread concern. On the one hand, people use methods such as environmentally friendly and green chemical synthesis routes to reduce pollution from the source and fundamentally; The new method is also becoming a hot spot at home and abroad. Through the joint efforts and practice of scientists, the treatment technologies for heavy metals, suspended solids (SS), biodegradable organic pollutants (BOD), nitrogen, phosphorus and other pollutants in water are becoming more and more perfect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/78C02F1/28
Inventor 李时银李小荣朱怡苹王国祥尚鸣
Owner 常熟紫金知识产权服务有限公司
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