Dephosphorization method of chemical wastewater generated in process of producing hydrogen peroxide through anthraquinone method

A technology of chemical wastewater and hydrogen peroxide, which is applied in the field of environmental engineering, can solve the problems of difficult disposal of hazardous solid waste, large sedimentation volume, and high moisture content, and achieve good dehydration performance, small volume, and low moisture content.

Inactive Publication Date: 2017-05-17
北京普利科林环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] There are many classic methods of dephosphorization at home and abroad, such as calcium salt coagulation precipitation method, iron salt coagulation precipitation method, classic A / O treatment, etc. These methods have good removal effect on orthophosphate, but they are not Organic phosphorus compounds such as trioctyl phosphate have no removal effect, and the precipitates produced are flocs with high moisture content and large precipitation volume. It is difficult and expensive to treat as hazardous solid waste

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  • Dephosphorization method of chemical wastewater generated in process of producing hydrogen peroxide through anthraquinone method
  • Dephosphorization method of chemical wastewater generated in process of producing hydrogen peroxide through anthraquinone method
  • Dephosphorization method of chemical wastewater generated in process of producing hydrogen peroxide through anthraquinone method

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Embodiment 1

[0038] A kind of chemical industry waste water dephosphorization method that anthraquinone method produces hydrogen peroxide of the present invention, technological process is as figure 1 shown, including the following steps:

[0039] (1) Organic phosphorus is converted into inorganic PO 4 3- : Add sodium hydroxide to the chemical wastewater produced by anthraquinone method to produce hydrogen peroxide (the chemical wastewater contains organic phosphorus such as 172 mg / L trioctyl phosphate, and the total phosphorus is 228 mg / L) to adjust the pH of the chemical wastewater to 10, and carry out hydrolysis reaction , the temperature of the hydrolysis reaction is controlled at room temperature (28°C), the pH is 10.0, the time is 8 h, and the conversion of organic phosphorus to inorganic PO 4 3- The conversion rate is 99.5%.

[0040] (2) Struvite crystallization: add ammonia salt and magnesium salt to the hydrogen peroxide production wastewater after the hydrolysis reaction in s...

Embodiment 2

[0042] A kind of chemical industry waste water dephosphorization method that anthraquinone method of the present invention produces hydrogen peroxide comprises the following steps:

[0043] (1) Organic phosphorus is converted into inorganic PO 4 3-: Add sodium hydroxide to the chemical wastewater produced by anthraquinone method to produce hydrogen peroxide (the chemical wastewater contains organic phosphorus such as 196 mg / L trioctyl phosphate, and the total phosphorus is 286 mg / L) to adjust the pH of the chemical wastewater to 10.5, and carry out hydrolysis reaction , control the temperature during the hydrolysis reaction to be 45°C, the pH to be 10.5, and the time to be 4 h to complete the conversion of organic phosphorus to inorganic PO 4 3- The transformation, its transformation rate is 99.2%.

[0044] (2) Struvite crystallization: add ammonia salt and magnesium salt to the hydrogen peroxide production wastewater after the hydrolysis reaction in step (1), and carry out...

Embodiment 3

[0046] A kind of chemical industry waste water dephosphorization method that anthraquinone method of the present invention produces hydrogen peroxide comprises the following steps:

[0047] (1) Organic phosphorus is converted into inorganic PO 4 3- : Add sodium hydroxide to the chemical wastewater produced by anthraquinone method to produce hydrogen peroxide (the chemical wastewater contains organic phosphorus such as 223 mg / L trioctyl phosphate, and the total phosphorus is 328 mg / L) to adjust the pH of the chemical wastewater to 11, and perform hydrolysis reaction, control the temperature during the hydrolysis reaction to be 35°C, the pH to be 11, and the time to be 10 h to complete the conversion of organic phosphorus to inorganic PO 4 3- The conversion, its conversion rate is 99.3%.

[0048] (2) Struvite crystallization: add ammonia salt and magnesium salt to the hydrogen peroxide production wastewater after the hydrolysis reaction in step (1), and carry out struvite cry...

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Abstract

The invention discloses a dephosphorization method of chemical wastewater generated in a process of producing hydrogen peroxide through an anthraquinone method. The dephosphorization method comprises the following steps: adding sodium hydroxide into the chemical wastewater generated in the process of producing hydrogen peroxide through the anthraquinone method and carrying out a hydrolysis reaction; converting organic phosphorus in the chemical wastewater into inorganic PO4<3->; adding ammonia salt and magnesium salt to be subjected to a struvite crystal precipitation reaction with the inorganic PO4<3->; and separating out sediment to obtain dephosphorized wastewater. The method disclosed by the invention is simple in technological process, small in secondary pollution and low in cost; special equipment is not needed, and the investment and operation cost is low, and the dephosphorization method is easy to popularize and apply; and the difficulties that the content of total phosphorus and organic phosphorus in the wastewater generated in the process of producing hydrogen peroxide is high, the subsequent load of a sewage treatment plant of a biochemical system is great and the total phosphorus of output water difficultly reaches standards are effectively overcome.

Description

technical field [0001] The invention belongs to the field of environmental engineering, and in particular relates to a dephosphorization method for chemical wastewater produced by anthraquinone method to produce hydrogen peroxide. Background technique [0002] 10 m of sewage produced by the hydrogen peroxide plant of Baling Petrochemical 3 / h, the main characteristic pollutants are phosphate, trioctyl phosphate, anthraquinones and residual hydrogen peroxide. Its main feature is high total phosphorus (about 500mg / L), and the organic phosphorus content accounts for about 70%. , such a high amount of phosphide enters the follow-up biochemical system, which greatly exceeds its biochemical treatment capacity. This is the main reason why the total phosphorus in the effluent of Qilishan sewage treatment plant in Baling Petrochemical City is unqualified (total phosphorus in the effluent of Qilishan biochemical workshop is 15 mg / L), in addition, organic compounds such as trioctyl ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/30C02F103/36
CPCC02F1/00C02F1/5254C02F2101/30C02F2103/365
Inventor 沈润梅
Owner 北京普利科林环境科技有限公司
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