Oil-containing wastewater treatment system

A wastewater treatment system and raw water technology, applied in water/sewage treatment, flotation water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems of inappropriate precision separation devices, etc., and achieve the purpose of suppressing the reduction of filtration performance, Enhanced stability and reduced installation area

Active Publication Date: 2013-09-11
SUMITOMO ELECTRIC IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Accordingly, in the treatment of oily wastewater discharged in large quantities, a precise separation device is not suitable in consideration of the treatment speed

Method used

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  • Oil-containing wastewater treatment system
  • Oil-containing wastewater treatment system
  • Oil-containing wastewater treatment system

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Experimental program
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Embodiment Construction

[0033] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0034] figure 1 with figure 2 One embodiment of the invention is shown.

[0035] exist figure 1 In the schematic diagram shown, reference numeral 1 denotes a separation tank which separates impurities by flotation and sedimentation, and reference numeral 2 denotes a membrane filtration tank which filters out impurities with a membrane.

[0036] The membrane filtration tank 2 accommodates a hollow fiber membrane module (membrane separation module) 3 and a bubble generating diffuser 4 arranged below the hollow fiber membrane module 3 .

[0037] The vertical middle area of ​​the separation tank 1 is connected with the lower area of ​​the membrane filtration tank 2 through the supply pipe 6, and a pump 5 is arranged between the two. In addition, a return pipe 7 is provided, which connects the upper area of ​​the membrane filtration tank 2 and the upper area of ​​the se...

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Abstract

In order to simplify devices by efficiently combining dissimilarities of respective steps used in an oil-containing wastewater treatment system, in a supply path of raw water produced from oil-containing wastewater, a separation tank for floating and separating an oil content, and downstream from the separation tank, a membrane filtration tank in which a membrane separation module produced from a hollow fiber membrane or a flat membrane is disposed therein and a diffuser for generating air bubbles is installed below the membrane separation module is disposed, and a supply pipe provided with a circulating pump in the middle thereof to supply the raw water from the separation tank to the membrane filtration tank, and a return pipe for returning unfiltered water containing the oil content and the air bubbles from the membrane filtration tank to the separation tank are provided.

Description

technical field [0001] The present invention relates to an oily wastewater treatment system, in particular, to such an oily wastewater treatment system, which combines separation (including flotation and sedimentation) in the pretreatment process with membrane filtration in the posttreatment process, and wherein , to perform efficient processing by combining functions in the pre-processing process with those in the post-processing process. Background technique [0002] Various treatment devices and treatment methods have been proposed for removing oil from oily wastewater. In general, in oily wastewater treatment, pretreatment including coagulation sedimentation / pressurized flotation and the like is performed, and then posttreatment including filtration, activated carbon treatment and the like is performed. However, in a treatment system that continuously performs a plurality of wastewater treatment processes, the amount of water that can be treated decreases as the treatme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/44B01D17/035B01D21/00B01D21/06B01D21/24B01D65/02B01D69/06B01D69/08B01D71/36B01D71/68C02F1/24C02F1/40
CPCB01D21/06B01D65/02B01D71/36B01D71/68C02F1/24C02F1/40B01D61/16B01D63/02B01D63/08B01D2311/04B01D2315/06B01D2321/185B01D61/147C02F1/444C02F9/00C02F2001/007C02F2101/32B01D21/01B01D21/2427B01D21/2433B01D21/2488B01D21/0084B01D2311/00B01D63/031C02F1/44
Inventor 牛越健一森田彻井田清志水谷贞三
Owner SUMITOMO ELECTRIC IND LTD
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