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Petrochemical effluent treating and reusing process

A petrochemical and treatment process technology, applied in the field of petrochemical sewage reuse treatment process, can solve the problems of ineffective removal of Fe and other metal ions, ineffective removal of suspended solids, and increased operating costs, so as to prolong the effective active time and occupy The effect of small floor area and saving operating costs

Active Publication Date: 2007-03-21
JIANGSU JINSHAN ENVIRONMENTAL PROTECTION TECH
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Problems solved by technology

Although this invention process mentions that it can remove part of COD through strong oxidation, activated carbon adsorption and biodegradation, the purpose is still to effectively remove NH 3 -N proposed, and need to add carbonate; flocculation air flotation, need to add chemicals, increase operating costs, generate scum need to add additional treatment facilities; single sand filter, can not effectively remove complex suspended matter in water, such as humus , cellulose, and bacterial baths also cannot effectively remove metal ions such as Fe; each treatment process section still needs to be equipped with corresponding power upgrades, which increases operating costs

Method used

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  • Petrochemical effluent treating and reusing process
  • Petrochemical effluent treating and reusing process

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Embodiment

[0020] Example: See Figures 1 and 2, the treated influent water is a refinery wastewater treated to COD cr 101mg / l, turbidity 16mg / l, oil 9.7mg / l, water temperature 15-40℃ pretreatment water. According to the flow chart in Figure 1: the incoming water is filtered through the multi-media pressure filter 1, and the filtered water is injected into the COD per gram cr 7.8mg / l ozone, fully mixed by a static tube mixer, and then put into a coal with typical adsorption value > 750mg / g, strength > 95%, moisture cr 37mg / l, removal rate 63%, turbidity 3.3mg / l, removal rate 79%, oil 4.1mg / l, removal rate 58%, no metal ions such as Fe were detected.

[0021] Among them, the pressure filter 1 is respectively placed with a 600mm layer of anthracite filter material with a particle size of 1-2mm from top to bottom; a 600mm layer of quartz sand filter material with a particle size of 1-1.2mm; The iron ore filter layer is 600mm, and the magnetite filter layer with a particle size of 0.5-1.0...

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Abstract

The present invention is improved petrochemical effluent treating and reusing process, and features that the petrochemical effluent after conventional treatment is further treated in a pressure filter with anthracite filter material, quartz sand filter material and magnetite filter material successively loaded in the water flow direction in layers; oxidized with ozone in the amount of 6-12 mg each gram of CODcr; and treated in aerobic biofilter with loaded active carbon. The treated petrochemical effluent can reach the standard of reused water, and the present invention has the advantages of simple technological process, less needed apparatus, small covered area, low cost, no secondary pollution, etc.

Description

technical field [0001] The invention relates to the improvement of the advanced treatment process for recycling the sewage produced in the petrochemical production process after conventional treatment. Background technique [0002] The wastewater produced in petrochemical production has complex components, which is a mixed wastewater containing various pollutants such as suspended solids, sulfide, oil, salt, alkali, phenol, cyanide, benzene, paraffin, organic nitrogen, Fe and other metal ions; It also contains high molecular polymers added in the production and pre-water treatment process; the oil content is large, reaching 300-500mg / l; NH 3 -N concentration is high, generally up to 200-500mg / l; salt content is high, generally 2000-20000mg / l; pH fluctuates greatly, pH is 4-9, so it is difficult to handle. At present, a combination of physicochemical and biochemical treatment methods is usually adopted, such as oil separation, flotation, A / 0, contact oxidation, precipitation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/78C02F3/02C02F3/10C02F1/50
CPCY02W10/10
Inventor 周仕良
Owner JIANGSU JINSHAN ENVIRONMENTAL PROTECTION TECH
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