Internal recycle photoelectron-catalytic oxidation combined treatment device

A technology of photoelectric catalysis and treatment device, which is applied in special compound water treatment, oxidized water/sewage treatment, illumination water/sewage treatment, etc. Reduction and other problems, to achieve the effect of reducing the recombination rate of photogenerated electrons and holes, improving the photocatalytic activity, and enhancing the removal ability

CN105967313AActive Publication Date: 2016-09-28CHINA NAT OFFSHORE OIL CORP +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2016-09-28

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Abstract

The invention discloses an internal recycle photoelectron-catalytic oxidation combined treatment device. According to the treatment device, a water inlet (2) is formed in the bottom of a treatment device cylinder (1) and is communicated with a circular water distributor (3); wastewater is uniformly distributed to the bottom of the device through the circular water distributor (3); a photoelectron-catalytic oxidation combined treatment system (4) is arranged above the circular water distributor (3); a sediment mud bucket (5) is arranged under the circular water distributor (3) and is communicated with a mud discharge hole (6); under the condition that a direct-current power supply is loaded to the photoelectron-catalytic oxidation combined treatment system (4), the wastewater is lifted to the top of the device from the bottom of a photoelectron-catalytic oxidation unit (7); part of the wastewater is discharged out from a water outlet (9) in the upper part of the device; another part of the wastewater is further circulated to the bottom of the photoelectron-catalytic oxidation unit (7) through a central partitioning cylinder (8) and is mixed with water, then circulation of the wastewater inside the photoelectron-catalytic oxidation combined treatment system (4) is achieved, mud dregs generated from reaction can be discharged out from the mud discharge hole (6) at regular time, and generated tail gases can be discharged out from a top tail gas treater (10).
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Description

technical field

[0001] The invention belongs to the field of environmental engineering wastewater treatment, and relates to a wastewater treatment technology, in particular to an internal circulation photoelectric catalytic oxidation combined treatment device. Background technique

[0002] With the continuous improvement of my country's industrialization level, industrial water consumption continues to increase, industrial production processes such as petroleum refining, chemical product production, etc. produce a large amount of industrial wastewater, which often contains a large amount of artificially synthesized refractory organic pollutants such as benzene, biphenyl Such substances generally have the characteristics of stable structure, high toxicity, and long biodegradation cycle. Once discharged into water bodies, they will cause serious pollution to the surface water environment. Industrial wastewater treatment technology can be used as an important means of this type ...

Examples

Embodiment 1

[0028] A petrochemical company in Heilong Province used biochemical methods to treat petroleum refining wastewater, and the volume of wastewater was about 20m 3 / h, wastewater contains a large amount of refractory and toxic and harmful substances, such as benzene, acrylonitrile and other substances. With the improvement of environmental protection standards, the existing sewage treatment process is facing upgrading and transformation.

[0029] The company's biochemical effluent was carried out for 3m by using the internal circulation photoelectric catalytic oxidation combined treatment device of the present invention 3 / d pilot deep treatment test, the COD of the water entering the device is between 159-331mg / L, with an average of 272mg / L, the device is loaded with a DC power supply output current of 500A, and a medium-pressure mercury lamp is used as the ultraviolet light source. 310-365nm, the power of a single cylindrical ultraviolet light source is 200w, and the residence ...

Embodiment 2

[0031] An oil production company in Liaoning Province used oil separation + biochemical process to treat the waste water containing polymer in the land terminal oil production, and the water volume was about 180m 3 / h, the wastewater contains a large amount of refractory cyclic substances and polymers, resulting in poor biodegradability of the wastewater, and poor treatment effect of the existing process. It is difficult to meet the technical requirements with traditional oxidation technology and biotechnology.

[0032] Using the internal circulation photoelectric catalytic oxidation combined treatment device of the present invention to carry out 24m to the wastewater containing poly 3 / d pilot test, the influent COD of poly-containing wastewater is between 272-378mg / L, the average is 343mg / L, the output current of the DC power supply is 600A, and the low-pressure mercury lamp is used as the ultraviolet light source, and the ultraviolet light wavelength is 220-250nm , the pow...