Integrated treatment method of p-(beta-sulfatoethylsulfonyl)aniline production wastewater

A technology for the production of sulfuric acid ethyl sulfone and waste water, which is applied in biological water/sewage treatment, water/sewage treatment, natural water treatment, etc. It can solve the problems of complete removal of pollutants, high COD concentration, and complex waste water composition. Achieve the effect of strong anti-toxicity and stable operation

Inactive Publication Date: 2016-02-24
XINXIANG HUIFENG DYEING & CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Para-ester production wastewater contains products, intermediates, raw materials and various by-products, and the composition of the wastewater is complex, and the concentration of COD is high. It is an organic chemical wastewater that is e

Method used

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  • Integrated treatment method of p-(beta-sulfatoethylsulfonyl)aniline production wastewater
  • Integrated treatment method of p-(beta-sulfatoethylsulfonyl)aniline production wastewater

Examples

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Example Embodiment

[0024] Example 1

[0025] The main product of an enterprise is p-(β-sulfate ethyl sulfone) aniline. The production process of the enterprise is the acetanilide method, that is, acetanilide undergoes chlorosulfonation, reduction, and then condenses with ethylene oxide for esterification. The raw materials used in production include chlorosulfonic acid, acetanilide, ethylene oxide, liquid caustic soda, sulfuric acid, sodium metabisulfite, etc. The production wastewater of enterprises mainly includes saline alkaline wastewater and acid wastewater containing inorganic acids. The wastewater has complex components and high concentration of organic matter, which is extremely difficult to degrade high-concentration organic wastewater. The wastewater volume and quality data are as follows:

[0026] Acidic wastewater generated in the chlorosulfonation production section: water volume Q=1000m 3 / d

[0027] COD cr =5500mg / L contains 2.8% acid.

[0028] Salt-containing alkaline wastew...

Example Embodiment

[0038] Example 2

[0039] The biochemical effluent (CODcr610mg / L) of Example 1 was treated by the improved oxidation ditch, and then entered the Fenton oxidation fluidized tower for Fenton oxidation treatment, and the Fenton fluidized tower was filled with 10% modified basalt filler. The modification process of basalt filler is as follows: crush massive basalt to 0.5-2mm, mix with 10% ferrous sulfate solution, neutralize to pH 6 with 30% NaOH solution, remove excess liquid, and soak the impregnated basalt The filler is sintered in an industrial kiln at 600°C for 2 hours and then cooled to complete the modification of the basalt filler. The operating conditions of Fenton oxidation are: pH is 3.0, [H 2 o 2 ] dosage is 40mmol / L, FeSO 4 ·7H 2 O dosage 10mmol / L, [H 2 o 2 ] / [Fe 2+ ] The molar ratio is 4:1, and the reaction time is 2 hours. After the reaction, the pH is adjusted to 7-8 with 30% NaOH, and the effluent enters the triple sedimentation tank for mud-water separatio...

Example Embodiment

[0040] Example 3

[0041] The biochemical effluent (CODcr610mg / L) of Example 1 was treated by the improved oxidation ditch, and then entered into the Fenton oxidation fluidized tower for Fenton oxidation treatment, and the Fenton fluidized tower was filled with 15% modified basalt filler. Modification of basalt filler: crush massive basalt to 0.5-2mm, mix with 15% ferrous sulfate solution, neutralize to pH 7 with 30% NaOH solution, remove excess liquid, mix impregnated basalt filler with After sintering in an industrial kiln at 650°C for 2.5 hours and then cooling, the modification of the basalt filler is completed. The operating conditions of Fenton oxidation are: pH is 3.3, [H 2 o 2 ] dosage is 30mmol / L, FeSO 4 ·7H 2 O dosage 10mmol / L, [H 2 o 2 ] / [Fe 2+ ] The molar ratio is 3:1, and the reaction time is 2.5 hours. After the reaction, the pH is adjusted to 7-8 with 30% NaOH, and the effluent enters the triple sedimentation tank for mud-water separation. After Fenton ox...

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Abstract

The invention discloses an integrated treatment method of p-(beta-sulfatoethylsulfonyl)aniline production wastewater. The method comprises the following steps: carrying out multiple-effect evaporation on salt-containing wastewater in the p-(beta-sulfatoethylsulfonyl)aniline production wastewater through adopting a multiple-effect evaporation technology to separate out salts, mixing a crystallization mother liquor with condensed water, adjusting the pH value, neutralizing acid-containing wastewater by adopting wastes-white mud generated in a pulping papermaking enterprise alkali recovery system, mixing the neutralized acid-containing wastewater, the crystallization mother liquor and the condensed water, and allowing the obtained mixture to enter an improved oxidation ditch in order to carry out biological treatment; and carrying out oxidation treatment on biochemical tailing water by adopting a Fenton fluidized column, wherein a packing in the fluidized column adopts modified basalt, and the surface of modified basalt packing is attached with a large amount of iron oxide to reduce the use amount of a catalyst FeSO4.7H2O in the Fenton oxidation process and reduce the later sludge treatment amount. The method allows the COD removal rate of the p-(beta-sulfatoethylsulfonyl)aniline production wastewater to reach 98.5% and can effectively degrade wastewater extremely difficult to biochemically treat.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and specifically relates to an integrated treatment technology integrating multi-effect evaporation, improved oxidation ditch biological treatment and Fenton fluidized bed oxidation, which is applied to p-(β-sulfate ethyl sulfone) aniline Integrated treatment of production wastewater. Background technique [0002] p-(β-sulfate ethyl sulfone) aniline, referred to as p-ester, is an important intermediate of reactive dyes. A large amount of wastewater is discharged during the production process of para-ester. The wastewater has complex components and high COD concentration. It is an organic chemical wastewater that is extremely difficult to degrade. The research on para-ester wastewater treatment at home and abroad is almost blank. Due to its high salt, high chemical oxygen demand, and high toxicity, the conventional single treatment process has an extremely low degradation rate for wa...

Claims

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Application Information

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IPC IPC(8): C02F9/14
CPCC02F1/048C02F1/66C02F1/72C02F3/1257C02F9/00C02F2101/30C02F2103/34C02F2209/08C02F2305/026
Inventor 苗鹏飞苗新立
Owner XINXIANG HUIFENG DYEING & CHEM CO LTD
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