Treatment method for recycling coking wastewater and assembled treatment system

A technology for coking wastewater and treatment methods, applied in water/sewage treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc., can solve the problems of long treatment process, complicated wastewater reuse treatment system, etc. Effect

Inactive Publication Date: 2011-07-06
凯膜特种分离技术(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] To sum up, the coking wastewater reuse method in the prior art has a long treatment process, and the wastewater reuse treatment system is relatively complicated. Therefore, a simple rever

Method used

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  • Treatment method for recycling coking wastewater and assembled treatment system
  • Treatment method for recycling coking wastewater and assembled treatment system

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Embodiment 1

[0061] The COD of coking wastewater raw water after biochemical treatment is 300-600mg / L, NH 3 -N is about 30mg / L, and the chromaticity is 200 times. Dissolved gas pressure is 0.15MPa. The power supply of the electrocoagulation tank adopts 20A ~ 50A high-frequency pulse inverted power supply, the pulse frequency can be operated at 10KHz ~ 50KHz, and the inverted frequency can be operated at 10min.

[0062] After the raw water flows into the electrocoagulation tank from the water inlet at the bottom of the pretreatment device, after staying in the tank for 1 minute, it overflows from the top to the air flotation tank, mixes with dissolved air water and fully contacts. After 15 minutes, the air flotation effluent overflows into the membrane separation tank, and the water is pumped out through the membrane module.

[0063] The membrane module is a submerged microfiltration membrane, and its operating parameters are: the transmembrane pressure difference is controlled below 30kP...

Embodiment 2

[0067] The COD of coking wastewater raw water after biochemical treatment is 300-600mg / L, NH 3 -N is about 30mg / L, and the chromaticity is 200 times. Dissolved gas pressure is 0.15MPa. The power supply of the electrocoagulation tank adopts 20A~50A high-frequency pulse inverted power supply, the pulse frequency can be operated at 10KHz~50KHz, and the inverted frequency can be operated at 5min.

[0068] After the raw water flows into the electrocoagulation tank from the water inlet at the bottom of the pretreatment device, after staying in the tank for 2 minutes, it overflows from the top to the air flotation tank, mixes with dissolved air water and fully contacts. After 20 minutes, the air flotation effluent overflows into the membrane separation tank, and the water is sucked out through the membrane module.

[0069] The membrane module is a submerged ultrafiltration membrane, and its operating parameters are: the transmembrane pressure difference is controlled below 30kPa, a...

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Abstract

The invention provides a treatment method for recycling coking wastewater and an assembled treatment system. The method comprises the step of treating the coking wastewater in an integrated assembled treatment system of a pretreatment device and a reverse osmosis membrane device integrated electrochemistry, floating separation with membrane separation. The treatment method and the treatment system are stable in reverse osmosis membrane device running, extremely longer in a cleaning period, and floor space-saving.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a treatment method and combined treatment system for coking wastewater reuse. Background technique [0002] Coking wastewater is produced in the process of obtaining coke and gas from high-temperature pyrolysis of coal and recovering tar, benzene and other by-products in the production process. The chemical composition is very complex, containing a variety of organic substances that are difficult to be degraded by microorganisms or have biological toxicity and a large amount of ammonia salt. , sulfide, cyanide and other inorganic salts are a type of organic industrial wastewater that is difficult to purify and treat. [0003] At present, the biodegradation processes used in domestic and foreign treatment of coking wastewater mainly include anaerobic-anoxic-aerobic (ie A-A-O) and anoxic-aerobic (ie A-O), but the effluent chemical oxygen demand (COD) content And chrom...

Claims

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Application Information

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IPC IPC(8): C02F9/06C02F1/463C02F1/24C02F1/44
Inventor 傅立德
Owner 凯膜特种分离技术(上海)有限公司
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