Coking waste water reuse treatment method

A treatment method and technology for coking wastewater, applied in the directions of oxidized water/sewage treatment, chemical instruments and methods, adsorbed water/sewage treatment, etc., to achieve the effects of high permeability, obvious economic benefits, and long life

Inactive Publication Date: 2007-07-18
SHANDONG DALONG INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although other treatment methods have relevant reports and corresponding patents, such as application (patent) No.: 200510047393.2 energy-saving coking wastewater treatment process, application (patent) No.: 200510024373.3 a method for denitrification of coking wastewater, etc., it is only up to the discharge standard. From coking wastewater reuse treatment, there is no report of practical application

Method used

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Examples

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Embodiment Construction

[0018] The present invention will be specifically described below in conjunction with specific examples.

[0019] Take 1.5 tons of coking wastewater (COD content about 3000-10000mg / L, ammonia nitrogen content about 600-1200mg / L) in the aeration tank and aerate for 4 hours. Turn on the chlorine dioxide generator during the aeration process, and add chlorine dioxide in an amount of 60-200mg / L water. Discard the superficial foam.

[0020] The aerated waste water is pumped into the mixing tank for stirring. Use caustic soda or lime to adjust the pH of the wastewater to 9-11, add denitrification 1 # Reagent MgCl 2 .6H 2 O and 2 # Reagent Na 2 HPO 4 , wherein the ammonia nitrogen content and the mol ratio of 1# reagent and 2# reagent are 1:(1.0~2.0):(0.4~1.8), continue to stir for 10--20 minutes and add flocculant (addition amount 1-5 kg / ton water), stirring for 20-30 minutes. Slowly flow into the inclined plate settling tank for settling (control flow 1.0-5.0 tons / hour). ...

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Abstract

This invention relates to a reclaiming and processing method of charred waste water, which is used in coking industry. It utilizes method of combining physical, chemical processing and reversing osmosis membrane processing to process charring waste water. Its basic processing flow-sheet is: 1. Aerator aerates. 2. Adjust PH to 9-11, add denitrifying agent number one MgCl2.6H2O and number two Na2HPO4, mix,, add positive ion starch-dicyandiamide-formaldehyde-polymerized chloride ferric flocculating agent. 3. Filter with multi-medium filtrator. 4. Remove ammonia nitrogen with deaminizing nitrogen filtrator. 5. Reduction reaction process. 6. Carry out membrane processing by nanometer material compound membrane. Charring waste water processed by this invention has following characteristics: synthesize process cost is low. Operation is easy. Running is stable. It benefits for industrialization.

Description

(1) Technical field [0001] The invention relates to a wastewater treatment method, in particular to a recycling treatment method for coking wastewater in the coking industry. (2) Background technology [0002] The reuse treatment of coking wastewater is one of the most difficult problems in the domestic wastewater reuse treatment industry. At present, the technology commonly used to treat coking wastewater in China is the A-O (anaerobic-aerobic) method or the A-A-O (anaerobic-anoxic-aerobic) method. National first-level emission standards. It is understood that Panzhihua Iron and Steel Co., Ltd. and Shougang Group are currently the most widely used in the coking industry, and the treated wastewater can only meet the national secondary or primary discharge standards. There are certain technical difficulties if one wants to meet the standard of reclaimed water reuse. Although other treatment methods have related reports and corresponding patents, such as application (patent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/72C02F1/52C02F1/70C02F1/28C02F1/42
Inventor 王旭升牛世芳
Owner SHANDONG DALONG INDAL
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