Enhanced coagulation-gas stripping-membrane integration method and device for lightening membrane pollution

A technology of membrane fouling and coagulation, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve membrane fouling problems, extend operation cycle, reduce membrane fouling, The effect of reducing the clogging of membrane pores

Inactive Publication Date: 2010-07-14
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an integrated method of strengthening coagulation-gas stripping-membrane to reduce membrane fouling for the membrane fouling problem existing in the existing membrane filtration technology

Method used

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  • Enhanced coagulation-gas stripping-membrane integration method and device for lightening membrane pollution
  • Enhanced coagulation-gas stripping-membrane integration method and device for lightening membrane pollution
  • Enhanced coagulation-gas stripping-membrane integration method and device for lightening membrane pollution

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Embodiment 1

[0030] Such as figure 1 As shown, the integrated device designed by the method of the present invention comprises a coagulation reaction device 1, an external pressure hollow membrane filter assembly 3 and an aeration device 13, and the coagulation reaction device 1 is connected to the bottom of the external pressure hollow membrane filter assembly 3 through a pipeline, and the aeration The air device 13 is located at the bottom of the external pressure hollow membrane filter module 3 .

[0031] The coagulation reaction device 1 is a coagulation vessel with agitation or a pipeline mixer, and this embodiment is a coagulation vessel with agitation. The upper part of one side of the stirred coagulation container 1 is connected to the water inlet pipe 2, and the other side is connected to the lower part of the external pressure hollow membrane filter module 3 through a pipeline, and the coagulant and coagulant aid can be directly injected from the upper part of the coagulation con...

Embodiment 2

[0034] Such as figure 2 As shown, the device of this embodiment designed by the method of the present invention also includes a coagulation reaction device 1, an external pressure hollow membrane filter assembly 3 and an aeration device 13, and the coagulation reaction device 1 is connected to the bottom of the external pressure hollow membrane filter assembly 3 through a pipeline , the aeration device 13 is located at the bottom of the external pressure hollow membrane filter module 3 .

[0035] Because the present embodiment except 1) aeration device 13 is made of convex aeration pan 14, aeration pipe 16, ozone generator 18 and air blower 17; Provided with columnar catalyst 11, see image 3 , the catalyst 11 can be selected from metal iron, nickel, copper, platinum, palladium, ruthenium, rhodium, ferric oxide, iron oxyhydroxide, iron hydroxide, manganese dioxide, nickel oxide, titanium dioxide or copper oxide as required. One; 3) A gas collection and circulation pipe 12 i...

Embodiment 3

[0037] Such as Figure 4 As shown, the device of this embodiment designed by the method of the present invention also includes a coagulation reaction device 1, an external pressure hollow membrane filter assembly 3 and an aeration device 13, and the coagulation reaction device 1 is connected to the bottom of the external pressure hollow membrane filter assembly 3 through a pipeline , the aeration device 13 is located at the bottom of the external pressure hollow membrane filter module 3 .

[0038] The difference between this embodiment and Embodiment 1 is: 1) The coagulation reaction device 1 is a pipeline mixer, one end of the pipeline mixer 1 is connected to the water inlet pipe 2, and the other end is connected to the lower part of the external pressure hollow membrane filter assembly 3 through a pipeline , coagulant and coagulant can be directly added from the upper part of pipeline mixer 1. 2) The aeration device 13 is composed of an annular aeration head 15 , an aeratio...

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Abstract

The invention discloses an enhanced coagulation-gas stripping-membrane integration method for lightening membrane pollution. In the method, a coagulating agent and a coagulant aid are added into raw water and undergo enhanced coagulation reaction by applying hydraulic condition, and airflow circulation and lift treatment is performed while an external pressure hollow fiber membrane component is used for filtration. The invention also discloses an integration device designed according to the method. Through the technical measures of throwing the coagulating agent and the coagulant aid into the raw water, positioning gas stripping type aeration treatment under the filtering of the external pressure hollow fiber membrane component and the like, the method improves the pollutant removal rate and the water treatment effect, greatly lightens the membrane pollution, saves energy consumption of membrane component operation, prolongs the operating cycle of the membrane component, shortens the cleaning time, reduces the back washing cost, has small occupied area, low investment cost and simple and flexible implementation, is applicable to water treatment for large cities, and is also applicable to vast cities and towns and rural regions with imperfect water treatment process and small treatment scale.

Description

technical field [0001] The invention belongs to the technical field of membrane combination process and device for water treatment, and specifically relates to an integrated method and device of enhanced coagulation-air lift-membrane that can reduce membrane pollution and improve water quality treatment effect. Background technique [0002] In recent years, in order to meet the increasingly stringent sanitary standards for drinking water, microfiltration, ultrafiltration, and reverse osmosis technologies in membrane filtration technology have been more and more researched and applied as alternative technologies for conventional water treatment processes. The form of membrane modules has also shown a trend of diversification in recent years. In addition to hollow fiber type, coil type, tube type, plate frame type and folding type, rotary flat membrane and impregnated flat membrane have been developed. In drinking water treatment, hollow fiber microfiltration (MF) and ultrafil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/52C02F1/44C02F3/02
CPCY02W10/10
Inventor 刘百仓许加权林琳李俊俊郑哲
Owner SICHUAN UNIV
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