Method for treating phenolic wastewater in petrochemical engineering

A petrochemical and treatment method technology, which is applied in the treatment of petrochemical phenol-containing wastewater and in the field of environmental protection, can solve the problems of high treatment cost and high dosing amount, and achieve the effect of simple treatment method, high environmental protection benefit, and cost-effective treatment

Inactive Publication Date: 2018-10-30
ZHEJIANG SINOU ENVIRONMENTAL PROTECTION EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chemical oxidation method often fails to completely oxidize phenolic substances into inorganic substances, and the dosage is relatively high, and the treatment cost is high

Method used

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  • Method for treating phenolic wastewater in petrochemical engineering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The non-polar macroporous adsorption resin of styrene-divinylbenzene system is pretreated with 2 times the resin volume of absolute ethanol, and after removing impurities such as monomers remaining in the resin during the synthesis of the macroporous adsorption resin, use 3 times the resin volume The pretreated resin was packed in an adsorption column with a height-to-diameter ratio of 20, and the two-stage adsorption column was connected in series, and the air bubbles in the adsorption column after filling the resin were removed with water.

[0028] Pretreat the wastewater with a phenol content of 750mg / L in the petrochemical production line, adjust the pH to 3.6 with 10% HCl, pass the adjusted pH phenol-containing wastewater into the adsorption column for dephenolization treatment, and control the phenol-containing wastewater The volume flow rate is 10 times the resin volume / hour, the linear flow rate is about 8.4m / h, and the volatile phenol content in the effluent is ...

Embodiment 2

[0031] The non-polar macroporous adsorption resin of styrene-divinylbenzene system is pretreated with 2 times the volume of anhydrous methanol to remove impurities such as monomers remaining in the resin during the synthesis of the macroporous adsorption resin, and then use 3 times the volume of the resin The pretreated resin was packed in an adsorption column with a height-to-diameter ratio of 30, and the two-stage adsorption column was connected in series, and the air bubbles in the adsorption column after filling the resin were removed with water.

[0032] Pretreat the wastewater with a phenol content of 1000mg / L in the petrochemical production line, adjust the pH to 4.5 with 10% HCl, pass the adjusted pH phenol-containing wastewater into the adsorption column for dephenolization treatment, and control the phenol-containing wastewater The volume flow rate is 5 times the resin volume / hour, the linear flow rate is about 5.2m / h, and the volatile phenol content in the effluent i...

Embodiment 3

[0035] The adsorption column after the regeneration of the resin in Example 2 is used as the second section in series to the first section and then continues to operate to treat phenol-containing wastewater.

[0036]Pretreat the wastewater with a phenol content of 1000mg / L in the petrochemical production line, adjust the pH to 5.0 with 12% HCl, pass the adjusted pH phenol-containing wastewater into the adsorption column for dephenolization treatment, and control the phenol-containing wastewater The volume flow rate is 6 times the resin volume / hour, the linear flow rate is about 6.2m / h, and the volatile phenol content in the effluent is less than 0.1mg / L.

[0037] The purified water after dephenolization enters the biochemical system for biochemical treatment and is finally discharged. When the volatile phenol content in the effluent is >0.1mg / L, regenerate the resin with the methanol regeneration solution recovered after 2 times rectification, and control its volume flow rate ...

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Abstract

The invention discloses a method for treating phenolic wastewater in petrochemical engineering. The method comprises the following steps: a) resin treatment; b) pH regulation of wastewater; c) dephenolization treatment of wastewater; d) biochemical treatment of wastewater; and e) separation of phenolic substances. According to the method disclosed by the invention, phenolic substances harmful to microbes can be removed, and the recovered phenolic substances can serve as raw materials in other industries. The method realizes innocent treatment of the phenolic wastewater, and has high environmental protection benefits. Meanwhile, the treatment method is simple, the treatment cost is low, and the adsorption condition is mild.

Description

【Technical field】 [0001] The invention relates to the technical field of environmental protection, in particular to the technical field of the treatment of petrochemical wastewater containing phenol. 【Background technique】 [0002] Petrochemical production can produce a large amount of phenol-containing wastewater. After removing most of the sulfide and ammonia nitrogen by other processes, the phenol-containing wastewater with high phenol content is obtained. The waste water is light green in color and has a pungent smell. Its high concentration of phenol content makes its wastewater difficult to biochemically treat, and if it is exposed to the air for a long time, it will produce red quinones. Wastewater contains a large amount of phenolic substances and needs further treatment. Phenolic substances are extremely harmful to animals and must be removed before discharge. Traditional methods mainly include physical adsorption and chemical oxidation. The chemical oxidation m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/34C02F103/36
CPCC02F1/285C02F1/66C02F3/00C02F9/00C02F2101/345C02F2103/365C02F2301/08C02F2303/16
Inventor 万安铭吴哲峰詹瑛瑛
Owner ZHEJIANG SINOU ENVIRONMENTAL PROTECTION EQUIP CO LTD
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