A method for extracting and dephenolizing phenol-containing wastewater with multi-stage mixing and strengthening separation
A technology for strengthening separation and phenol wastewater, applied in separation methods, chemical instruments and methods, solvent extraction, etc., can solve the problems of increasing the energy consumption of extractant recovery by stripping, difficult control of the separation interface, and large extraction dosage of raffinate phase, etc. It achieves the effects of easy online analysis and automatic control, avoiding back-mixing phenomenon, and fast mass transfer balance
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Embodiment 1
[0038] Embodiment 1, extraction and dephenolization of coal chemical industry phenolic wastewater
[0039] according to figure 2 The process flow chart shown in the process extracts and removes phenols from coal chemical industry wastewater containing phenols. The specific steps are as follows:
[0040](1) The extractant (methyl isobutyl ketone) with a volume ratio of 1:6 and phenol-containing wastewater (total phenol 5750mg / L, polyphenol 1820mg / L, COD content 19340mg / L, pH value 8.0) by reverse The direction is sent to a multi-stage extraction device connected in series with 5 high-gravity extractors for multi-stage countercurrent extraction (level 5), and the final extraction phase (containing crude phenol and extractant) and the final raffinate phase (wastewater containing a small amount of extractant) are collected. );
[0041] Every high-gravity extractor comprises a mixing chamber (1) and an enhanced separation chamber (2), and the extractant and the phenol-containing...
Embodiment 2
[0044] Embodiment 2, extraction and dephenolization of coal chemical industry phenolic wastewater
[0045] according to figure 2 The process flow chart shown in the process extracts and removes phenols from coal chemical industry wastewater containing phenols. The specific steps are as follows:
[0046] (1) The extractant (methyl isobutyl ketone) with a volume ratio of 1:4 and phenol-containing wastewater (total phenol 5750mg / L, polyphenol 1820mg / L, COD content 19340mg / L, pH value 8.0) by reverse The direction is sent to a multi-stage extraction device connected in series with 3 high-gravity extractors for multi-stage countercurrent extraction (3 stages), and the final extraction phase (containing crude phenol and extractant) and the final raffinate phase (wastewater containing a small amount of extractant) are collected. );
[0047] Every high-gravity extractor comprises a mixing chamber (1) and an enhanced separation chamber (2), and the extractant and the phenol-containi...
Embodiment 3
[0050] Example 3, Extraction and dephenolization of coal chemical industry phenolic wastewater
[0051] according to figure 2 The process flow chart shown in the process extracts and removes phenols from coal chemical industry wastewater containing phenols. The specific steps are as follows:
[0052] (1) The extractant (methyl isobutyl ketone) with a volume ratio of 1:8 and phenol-containing wastewater (total phenol 5750mg / L, polyphenol 1820mg / L, COD content 19340mg / L, pH value 7.0) by reverse The direction is sent to a multi-stage extraction device connected in series with 7 high-gravity extractors for multi-stage countercurrent extraction (7 stages), and the final extraction phase (containing crude phenol and extractant) and the final raffinate phase (wastewater containing a small amount of extractant) are collected. );
[0053] Every high-gravity extractor comprises a mixing chamber (1) and an enhanced separation chamber (2), and the extractant and the phenol-containing ...
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