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Coal chemical industrial wastewater treatment system and treatment process

A coal chemical wastewater and treatment system technology, applied in multi-stage water treatment, flotation water/sewage treatment, water/sewage multi-stage treatment, etc., can solve problems such as low treatment efficiency and complicated process flow, and achieve simplified process flow , Reduce the cost of use, and the effect of reasonable pore structure

Inactive Publication Date: 2016-09-07
BEIJING GUODIAN FUTONG SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Therefore, the technical problem to be solved by the present invention is: the existing coal chemical wastewater treatment process has low treatment efficiency and complex process flow

Method used

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  • Coal chemical industrial wastewater treatment system and treatment process
  • Coal chemical industrial wastewater treatment system and treatment process
  • Coal chemical industrial wastewater treatment system and treatment process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] This embodiment provides a coal chemical wastewater treatment system, including a raw water tank, an anaerobic tank, an aerobic tank and a membrane tank connected in sequence. And film tank, aeration device is installed in the aerobic tank, and an active coke dosing system is installed on the upper part of the anaerobic tank. 0.5g / ml~0.6g / ml activated coke, a return circulation pipeline is set between the lower part of the membrane tank and the anaerobic tank, and the sludge generated at the membrane tank is returned to the anaerobic tank through the return pipeline.

[0058] In this embodiment, a pretreatment unit is provided between the raw water tank and the anaerobic tank. Optionally, the pretreatment unit further includes a grease trap and an air flotation tank, and the coal chemical wastewater is firstly treated in the grease trap and the air flotation tank. , in the present embodiment, the grease trap is preferably a sloping plate type grease trap; as a convertib...

Embodiment 2

[0081] This embodiment provides a coal chemical industry wastewater treatment system, such as Image 6 As shown, the raw water tank 1, the anaerobic tank 21, the aerobic tank and the membrane tank 25 are sequentially connected. , an aeration device is provided in the aerobic tank, and an active coke dosing system 3 is provided on the upper part of the anaerobic tank 21. The activated coke is 0.5g / ml~0.6g / ml, and the backflow circulation pipeline 6 is set between the lower part of the membrane tank 25 and the anaerobic tank 21, and the sludge generated at the membrane tank 25 is returned to the anaerobic tank through the backflow circulation pipeline 6. oxygen tank.

[0082] As an embodiment of the present invention, in this embodiment, the aerobic tank includes a primary aerobic tank 23 and a secondary aerobic tank 24, and the treatment in the two-stage aerobic tank can enhance the sewage treatment capacity.

[0083] In the present embodiment, between the anaerobic tank 21 a...

Embodiment 3

[0092]This embodiment provides a coal chemical wastewater treatment system, including a raw water tank, an anaerobic tank, an aerobic tank and a membrane tank connected in sequence. And film tank, aeration device is installed in the aerobic tank, and an active coke dosing system is installed on the upper part of the anaerobic tank. 0.5g / ml-0.6g / ml activated coke, a sludge return pipeline is set between the lower part of the membrane tank and the anaerobic tank, and the sludge generated at the membrane tank is returned to the anaerobic tank through the return circulation pipeline.

[0093] In this example, activated coke and excess sludge are discharged from the membrane tank and enter the dehydration mixed charcoal burning device.

[0094] This embodiment also provides a wastewater treatment process based on the above system, such as Figure 4 shown, including the following steps:

[0095] S1. Send the coal chemical industry wastewater from the raw water tank to the anaerobi...

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Abstract

The invention discloses a coal chemical industrial wastewater treatment system and a treatment process thereof. The coal chemical industrial wastewater treatment system comprises a raw water tank, an anaerobic tank, an aerobic tank and a membrane tank, which are sequentially connected, wherein coal chemical industrial wastewater sequentially passes through the anaerobic tank, the aerobic tank and the membrane tank after reaching the raw water tank through a lifting pump; an aeration device is arranged in the aerobic tank; a reflux circulation pipeline is arranged between the lower part of the membrane cell and the anaerobic tank; an activated coke addition system is arranged on the anaerobic tank, and a certain amount of activated coke is added into the anaerobic tank. The characteristic of developed mesopores of the activated coke in the wastewater treatment system can be fully utilized to achieve good adsorption effects on difficult-to-degrade organic matters, macromolecular organic matters and the like in the wastewater, and in addition, the activated coke can serve as a colloidal nucleus of activated sludge to improve the performance and water-bearing feature of the sludge and form a good water passage in the surface of a membrane to ensure membrane flux and prevent membrane pollution and plugging; moreover, the activated coke can be regenerated or mixed and hydrated with the sludge for blending combustion, so that the using cost is low.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a system and a wastewater treatment process for treating coal chemical wastewater by adopting an activated coke enhanced membrane bioreactor. Background technique [0002] Coal chemical industry refers to the industry that uses coal as raw material, converts coal into gas, liquid and solid products or semi-finished products through chemical processing, and then further processes them into chemical and energy products. During this process, a large amount of wastewater is discharged, and the wastewater contains a large amount of toxic and harmful substances such as phenol, cyanide, and ammonia nitrogen. COD in comprehensive wastewater is generally about 5000mg / l, ammonia nitrogen is 200-500mg / l, organic matter in wastewater includes phenols, polycyclic aromatic compounds and heterocyclic compounds containing nitrogen, oxygen and sulfur, etc., which is a typical industrial waste...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F101/30
CPCC02F1/24C02F1/40C02F1/44C02F3/30C02F9/00C02F2003/003C02F2101/30C02F2301/046C02F2301/08C02F2303/14
Inventor 李惠宇滕济林樊兆世张培林靳昕李若征汪笑龙王方杨万强刘谡飞李星伟
Owner BEIJING GUODIAN FUTONG SCI & TECH DEV
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