Coal-based ethylene glycol sewage treatment method and system

A sewage treatment method and sewage treatment system technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve high energy consumption and operating costs, high daily management requirements, Incomplete biodegradation and other problems, to achieve the effect of small footprint, improved treatment efficiency, and efficient removal

Inactive Publication Date: 2015-11-25
SINOPEC ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, the treatment methods in the prior art have the following problems: 1) the biodegradation is not complete, and the refractory organic matter still exists in the discharge water; 2) the process flow is long, the investment is high, the energy consumption and operation cost are high, High daily management requirements

Method used

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  • Coal-based ethylene glycol sewage treatment method and system
  • Coal-based ethylene glycol sewage treatment method and system

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Effect test

Embodiment 1

[0059] A method for the treatment of coal-based ethylene glycol sewage, comprising the following steps:

[0060] Carrying out stripping and purifying treatment of the coal-based ethylene glycol wastewater, recovering organic matter in the stripping gas, and obtaining primary treated wastewater;

[0061] Anaerobic biological treatment is carried out on the wastewater of the primary treatment to obtain the wastewater of the secondary treatment;

[0062] Carrying out aerobic biological treatment to the wastewater of the secondary treatment to obtain the wastewater of the tertiary treatment;

[0063] Carrying out Fenton oxidation treatment to the wastewater treated in the third stage to obtain the wastewater treated in the fourth stage;

[0064] The biological aerated filter is used to treat the waste water of the fourth stage treatment to obtain the waste water of the fifth stage treatment;

[0065] Ultrafiltration and reverse osmosis treatment are performed sequentially on the...

Embodiment 2

[0067] A method for the treatment of coal-based ethylene glycol sewage, comprising the following steps:

[0068] Carrying out stripping and purifying treatment of the coal-based ethylene glycol wastewater, recovering organic matter in the stripping gas, and obtaining primary treated wastewater;

[0069] Anaerobic biological treatment is carried out on the wastewater of the primary treatment to obtain the wastewater of the secondary treatment;

[0070] Carrying out aerobic biological treatment to the wastewater of the secondary treatment to obtain the wastewater of the tertiary treatment, and returning a part of it to the anaerobic biological treatment step;

[0071] Carrying out Fenton oxidation treatment to the remaining wastewater treated in the third stage to obtain wastewater treated in the fourth stage;

[0072] The biological aerated filter is used to treat the waste water of the fourth stage treatment to obtain the waste water of the fifth stage treatment;

[0073] Pe...

Embodiment 3

[0081] A coal-to-ethylene glycol sewage treatment system, including sequentially connected stripping purification processor, anaerobic bioreactor, aerobic bioreactor, Fenton oxidation reactor, aerated biological filter, ultrafilter and reverse permeable membrane device.

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Abstract

The invention provides a coal-based ethylene glycol sewage treatment method and system. The treatment method includes the following steps that steam stripping purification treatment, anaerobic biological treatment, aerobic biological treatment, Fenton oxidation treatment, aeration biofilter treatment, ultrafiltration and reverse osmosis treatment are sequentially carried out on coal-based ethylene glycol sewage, and the treated coal-based ethylene glycol sewage can be reused after being drained. The coal-based ethylene glycol sewage treatment system comprises a steam stripping purification treater, an anaerobic biological reactor, an aerobic biological reactor, a Fenton oxidation reactor, an aeration biofilter, an ultrafilter and a reverse osmosis device which are connected in sequence. The optimal purification effect is obtained through the shortest and most simple technological process, and the treated sewage meets the reuse index requirement and can be reused by a production water supply system; as the process is simple, the coal-based ethylene glycol sewage treatment method is suitable for large-scale industrialization.

Description

technical field [0001] The invention relates to the field of coal-to-ethylene glycol sewage treatment, in particular to a coal-to-ethylene glycol sewage treatment method and system. Background technique [0002] Coal chemical industry is an industry with great development prospects in my country, and the coal-to-ethylene glycol project requires a large amount of water, and correspondingly produces a large amount of wastewater, which contains excessive lye, phenols, cyanides, and polycyclic aromatics. compounds, lipids and alcohols. This type of wastewater has high COD and total nitrogen values, poor biochemical properties, and difficult one-time biochemical treatment. After conventional treatment methods, the wastewater is subjected to primary anaerobic biochemical, secondary aerobic biochemical, secondary sedimentation tank sedimentation, and sludge reflux. , post-coagulation sedimentation treatment, it is still difficult to meet the standard discharge and reuse standards. ...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 何庆生何小娟范景福张之骅王贵宾刘献玲
Owner SINOPEC ENG GRP CO LTD
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