Extraction dephenolization device and extraction dephenolization method for coal chemical industry wastewater treatment

A technology for coal chemical wastewater and extraction, which is applied in multi-stage water treatment, chemical instruments and methods, extraction water/sewage treatment, etc. Effect

Pending Publication Date: 2019-02-01
辽宁大唐国际阜新煤制天然气有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the purpose of the present invention is to provide a kind of extraction and dephenolization device and extraction and dephenolization device for the treatment of coal chemical industry wastewater for the defects in the prior art, especially the problem that the extraction efficiency of the existing device is reduced due to the above reasons. Phenol method

Method used

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  • Extraction dephenolization device and extraction dephenolization method for coal chemical industry wastewater treatment
  • Extraction dephenolization device and extraction dephenolization method for coal chemical industry wastewater treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] figure 1 An extraction and dephenolization device for coal chemical wastewater treatment is shown. The extraction and dephenolization device includes 4 centrifugal extractors—the first-stage CTL type single-stage centrifugal extractor 1, the second-stage CTL type single-stage centrifugal extractor 2, the third-stage CTL type single-stage centrifugal extractor 3 and The fourth stage CTL type single-stage centrifugal extractor 4, SV type static mixer 8, mixing and clarifying extraction tank 7, extraction agent circulation tank 5, first feed pump 6 and second feed pump 9.

[0059] The SV type static mixer 8 has a raw material liquid inlet, an extractant inlet and an outlet for receiving phenolic waste water, and its raw material liquid inlet is communicated with the feed line 11, and the feed line 11 is provided with a first valve a, and the extractant inlet There is a third valve c. The outlet of the SV-type static mixer 8 is communicated with the inlet of the mixing an...

Embodiment 2

[0073] figure 2 An extraction and dephenolization device for coal chemical wastewater treatment is shown, which has all the structures described in Example 1.

[0074] Such as figure 2 As shown, the outlet of the SV-type static mixer 8 is connected to the first raw material liquid inlet valve of the first-stage CTL type single-stage centrifugal extractor 1 via a branch line, so that the outlet of the SV-type static mixer 8 is connected to the first-stage The raw material liquid inlet S1 of the CTL type single-stage centrifugal extractor 1 is connected. At the same time, a fourth valve d is provided on the branch pipeline between the outlet of the SV static mixer 8 and the first raw material liquid inlet valve.

[0075] In addition, the extract from the first-stage CTL type single-stage centrifugal extractor 1 is sent to the phenol tower for processing through the branch pipeline provided with the second valve b.

[0076] When the phenol-containing wastewater in the mixing...

Embodiment 3

[0078] The device of Example 2 was used to treat the deacidification and deammonification wastewater (phenol-containing wastewater).

[0079] Coal gasification wastewater is phenol-containing wastewater (deacidification and deamination wastewater) obtained after degreasing, deacidification, and deamination treatment. The content of unit phenols in phenolic wastewater is 3100mg / L, the content of polyphenols (dihydric phenols and trihydric phenols) is 1200mg / L, the pH is 6.5, and the temperature is 40°C.

[0080] at 100m 3 Under the flow rate of / h, the phenol-containing wastewater is sent to the SV-type static mixer 8, and by controlling each valve, the phenol-containing wastewater flows through the SV-type static mixer 8, the mixing and clarifying extraction tank 7, and the first-stage CTL-type single-stage Centrifugal extractor 1, second-stage CTL single-stage centrifugal extractor 2, third-stage CTL single-stage centrifugal extractor 3 and fourth-stage CTL single-stage cent...

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Abstract

The invention provides an extraction dephenolization device for coal chemical industry wastewater treatment. The device includes a static mixer, a mixing clarification extraction tank and a pluralityof centrifugal extractors. Specifically, the inlet of the mixing clarification extraction tank is communicated with the outlet of the static mixer; the feed liquid inlet of a first-stage centrifugal extractor is communicated with the raffinate outlet of the mixing clarification extraction tank; the extracted liquid outlet of the first-stage centrifugal extractor is communicated with the extractantinlet of the static mixer through a pipeline; all the centrifugal extractors are in countercurrent connection; at least one of the centrifugal extractors is equipped with a first feed liquid inlet valve and a first raffinate outlet valve, and a first by-pass communicated with the valves are disposed outside; at least one of the centrifugal extractors is equipped with a second extractant inlet valve and a second extracted liquid outlet valve, and a second by-pass communicated with the valves are disposed outside; and the first by-pass and the second by-pass are equipped with valves. The invention also provides an extraction dephenolization method for coal chemical industry wastewater treatment.

Description

technical field [0001] The invention belongs to the field of coal chemical wastewater treatment, and in particular relates to an extraction and dephenolization device and an extraction and dephenolization method for treating coal chemical wastewater such as crushed coal gasification wastewater. Background technique [0002] Crushed coal gasification technology produces a large amount of phenol-containing organic wastewater in industrial applications. The organic wastewater is usually treated through degreasing, deacidification, and deaminization processes, and then enters the dephenolization device for extraction, solvent stripping, and phenol distillation. , and finally recover a certain concentration of phenol-containing wastewater, which is usually sent to the biochemical process for further treatment for recycling. [0003] At present, the combination of mixing-settling tank and packed extraction tower and centrifugal extractor series cross-flow extraction are usually us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/02C02F101/34
CPCC02F1/26C02F1/38C02F2101/345C02F2301/08
Inventor 曲传刚陈宏伟林岩孟祥清张川邢方亮
Owner 辽宁大唐国际阜新煤制天然气有限责任公司
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