Efficient treatment combination process of acrylonitrile wastewater

A technology of acrylonitrile wastewater and combined process, which is applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, water pollutants, etc., and can solve the problem of lack of effluent in biochemical systems, insufficient understanding of wastewater characteristics, and denitrification of biochemical systems Insufficient functions and other problems, to achieve the effect of ensuring the denitrification effect, reducing the treatment load and treatment cost, and improving the treatment capacity and treatment effect

Active Publication Date: 2015-12-23
抚顺顺能化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an advanced oxidation technology, biochemical High-efficiency combined process for the treatment of acrylonitrile wastewater by organically combining treatment technology and membrane separation technology

Method used

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  • Efficient treatment combination process of acrylonitrile wastewater

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The influent of the catalytic oxidation tower of the combined process of efficient treatment of acrylonitrile wastewater is the wastewater produced by the four-effect evaporation and stripping of the sewage of the acrylonitrile plant. The water quality indicators are as follows: COD2081mg / L, NH 3 -N34.9mg / L, TN337mg / L, pH7.40, CN - 7.73mg / L, acrylonitrile (AN) 0.30mg / L, water temperature 65°C.

[0029] The water quality indicators of domestic sewage in the factory area are as follows: COD340mg / L, BOD 5 176mg / L, NH 3 -N23.4mg / L, SS167mg / L, pH7.16.

[0030] like figure 1As shown, the acrylonitrile production wastewater first enters the catalytic oxidation tower for catalytic hydrogen peroxide oxidation treatment. The catalyst is a supported catalyst, the carrier SBA-16 mesoporous molecular sieve, the active component is nano-CeO, and the catalytic oxidation tower adopts an upflow fixed bed form. , The hydraulic retention time is 60min. The effluent of the catalytic o...

Embodiment 2

[0033] The influent of the catalytic oxidation tower of the combined process of efficient treatment of acrylonitrile wastewater is the wastewater produced by the four-effect evaporation and stripping of the sewage of the acrylonitrile plant. The water quality indicators are as follows: COD2395mg / L, NH 3 -N45.3mg / L, TN306mg / L, pH7.36, CN - 7.60mg / L, acrylonitrile (AN) 0.30mg / L, water temperature 70°C.

[0034] The water quality indicators of domestic sewage in the factory area are as follows: COD319mg / L, BOD 5 160mg / L, NH 3 -N25.2mg / L, SS159mg / L, pH7.28.

[0035] like figure 1 As shown, the acrylonitrile production wastewater first enters the catalytic oxidation tower for catalytic hydrogen peroxide oxidation treatment, the catalyst is a supported catalyst, the carrier SBA-16 mesoporous molecular sieve, and the active component is MnO 2 , The catalytic oxidation tower adopts the fluidized bed form, and the hydraulic retention time is 45min. The effluent of the catalytic ox...

Embodiment 3

[0038] High-efficiency treatment of acrylonitrile wastewater combined process Catalytic oxidation tower feed water is wastewater produced by four-effect evaporation and stripping of acrylonitrile plant sewage, and its water quality indicators are as follows: COD2037mg / L, NH 3 -N46.8mg / L, TN325mg / L, pH7.33, CN-6.39mg / L, acrylonitrile (AN) 0.30mg / L, water temperature 67℃.

[0039] The water quality indicators of domestic sewage in the factory area are as follows: COD320mg / L, BOD 5 158mg / L, NH 3 -N26.1mg / L, SS142mg / L, pH7.29.

[0040] like figure 1 As shown, the acrylonitrile production wastewater first enters the catalytic oxidation tower for catalytic hydrogen peroxide oxidation treatment. The catalyst is a supported catalyst, the carrier MCM-41 mesoporous molecular sieve, the active component is Cu, and the catalytic oxidation tower adopts an upflow fixed bed form. The hydraulic retention time is 120min. The effluent of the catalytic oxidation tower and the domestic sewage...

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Abstract

The invention belongs to the field of chemical wastewater treatment of the petrochemical industry and particularly relates to an efficient treatment combination process of acrylonitrile wastewater. The combination process comprises: (1) acrylonitrile production wastewater enters a catalytic oxidation tower for catalytic hydrogen peroxide oxidation treatment; (2) water discharged form the catalytic oxidation tower and factory domestic sewage enter a biochemical treatment system after full mixing; the biochemical treatment system sequentially comprises an anaerobic hydrolysis tank, an anoxia tank and an MBR tank; (3) the biochemical treatment system adopts a membrane separation technique for treatment; partial concentrated solution flows back; the acrylonitrile production wastewater is wastewater produced by acrylonitrile device wastewater after four-effect evaporation and steam stripping; the temperature is 50 DEG C-80 DEG C; the hydraulic retention time in the catalytic oxidation tower is 30-120 min. According to the efficient treatment combination process of acrylonitrile wastewater, the microorganism poison inhibition effect of the biochemical treatment system microorganism can be reduced, the wastewater biodegradability is improved, the treatment load and the treatment cost of the catalytic oxidation tower are reduced, the denitrification effect is guaranteed, and the membrane service life is prolonged.

Description

Technical field [0001] The present invention is the field of chemical wastewater treatment in the petrochemical industry, which specializes in the high -efficiency combination of acrylic wastewater that organically combines advanced oxidation technology, biochemical treatment technology and membrane separation technology. Background technique [0002] Acrylite is an important organic chemical raw material. In addition to the main production of acrylics, it is also used to produce ABS, AS, acrylamide, butadya rubber and chipylhrophla, Ji diexi / dilate, acrylin obstruction resin,Polypropylene carbon fiber, etc., is widely used.At present, the commonly used process of the production of acrylics in China is acrylic ammonia oxidation method, that is, the main raw materials of propylene, ammonia and air. Under the action of certain response conditions and catalysts, acryline, glycelet and hydrocyanic acid.The content of acrylics and wastewater produced during the above -mentioned propyl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/38
Inventor 李长波赵国峥张强白金姜虎生
Owner 抚顺顺能化工有限公司
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