High-phenol concentration waste water treatment method

Abstract

The invention discloses a high-phenol concentration waste water treatment method. The high efficiency and economic phenol-containing waste water extraction method comprises 1, removing impurities of high-phenol concentration waste water, 2, putting eudesmol and the high-phenol concentration waste water treated through the step 1 into an extraction container according to a volume ratio of 1: 1-10, carrying out fast stirring at a temperature of 10-50 DEG C for 5-20min and carrying out standing for 15-80min, 3, separating a raffinate phase in the lower layer and an extract phase in the upper layer from the stood solution through gravity flows, and analyzing phenol content of the raffinate phase through a gas chromatography method, 4, carrying out rectification on the extract phase obtained through the step 3 to obtain a phenol removal extraction agent and a crude phenol product and recycling the phenol removal extraction agent for extraction of high-phenol concentration waste water, and 5, carrying out rectification on the raffinate phase obtained through the step 3 to obtain the residual phenol removal extraction agent and the phenol-free waste water. The high-phenol concentration waste water treatment method belongs to the technical field of water treatment.

Description

technical field [0001] The invention relates to a treatment method for phenol-containing wastewater, in particular to a treatment method for high-concentration volatile phenol-containing wastewater, belonging to the technical field of water treatment. Background technique [0002] Eucalyptol, also known as eucalyptol, is a colorless or light yellow oily transparent liquid. Has a camphor scent and a cooling herbal scent. Boiling point 176°C, melting point 1-1.5°C, freezing point 1°C, flash point 47-48°C, soluble in ethanol, ether, chloroform, glacial acetic acid, propylene glycol, glycerin and most non-volatile oils, slightly soluble in water. Eucalyptus oil is obtained from eucalyptus leaves, and the production of eucalyptus oil both at home and abroad adopts a steam distillation process. my country is very rich in eucalyptus oil resources. my country has introduced eucalyptus for more than 100 years, and about 300 species of eucalyptus have been introduced. Up to now, mor...

AI Technical Summary

Problems solved by technology

However, the solubility of methyl isobutyl ketone in water is 2%, and the residual amount and organic residue amount in waste water are relatively high, which is easy to cause solvent loss and secondary pollution. Solvent regeneration has an important impact on economy and technology

[0005] Chinese patent 20121014513.7 discloses the use of isopropyl ether, isopropyl butyl ketone, and methyl tert-amyl ether as extractants for extraction and dephenolization. First, acid gas is used to saturate the wastewater to reduce the pH value, and then the dephenol extraction agent is used Carry out dephenolization treatment, and finally use single-tower pressurized stripping to carry out deacidification, deamination and solution stripping. The disadvantages of this method are: the extraction ability of the extractant is weak, the energy consumption is too high, the price is high, and the process is complicated, which directly leads to the treatment of waste water. Inefficient and cost prohibitive

[0006] To sum up, in the current prior art, when using extractant to extract and dephenolize volatile phenols, the extraction and dephenolization rate is low; while using high-efficiency extractant, the solubility of the solvent in water is large, the energy consumption of solvent recovery is high, and the loss Large, increasing operating costs

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