CN107008155A - The cleaning method of milipore filter in a kind of desalinization application - Google Patents

The cleaning method of milipore filter in a kind of desalinization application Download PDF

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Publication number
CN107008155A
CN107008155A CN201710408376.XA CN201710408376A CN107008155A CN 107008155 A CN107008155 A CN 107008155A CN 201710408376 A CN201710408376 A CN 201710408376A CN 107008155 A CN107008155 A CN 107008155A
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CN
China
Prior art keywords
milipore filter
pickling
solution
cleaning method
backwash
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710408376.XA
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Chinese (zh)
Inventor
张晓东
杨兴涛
李珂
赵洪武
刘长青
吴成志
张卫军
潘光建
万鹏
于崇勤
李伟
孙勇飞
汤军强
刘祯
郭成祥
袁陆
王成龙
于勇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao One Hundred Sea Desalination Co Ltd
Original Assignee
Qingdao One Hundred Sea Desalination Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qingdao One Hundred Sea Desalination Co Ltd filed Critical Qingdao One Hundred Sea Desalination Co Ltd
Priority to CN201710408376.XA priority Critical patent/CN107008155A/en
Publication of CN107008155A publication Critical patent/CN107008155A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
    • B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/14—Ultrafiltration; Microfiltration
    • B01D61/145—Ultrafiltration
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/02—Forward flushing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/04—Backflushing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/16—Use of chemical agents
    • B01D2321/162—Use of acids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/16—Use of chemical agents
    • B01D2321/168—Use of other chemical agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/28—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling by soaking or impregnating
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/08—Seawater, e.g. for desalination
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/14—Maintenance of water treatment installations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124—Water desalination
    • Y02A20/131—Reverse-osmosis

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  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The invention discloses the cleaning method of milipore filter in a kind of desalinization application, including step once：Water is rinsed or chemistry strengthens backwash；Pickling；Immersion；Water backwash or chemistry strengthen backwash；Acidwash solution use the citric acid solution or mass fraction of mass fraction 1% for 2 10% oxalic acid solution, also contain EDTA in the Acidwash solution solution, this method milipore filter scavenging period can be foreshortened to offline scavenging period 1/3rd even it is shorter, with the short time chemistry safeguard reach the effect cleaned offline.

Description

The cleaning method of milipore filter in a kind of desalinization application
Technical field
The present invention relates to the Cleaning Maintenance Technology field of milipore filter, surpass in being applied in particular to a kind of desalinization The cleaning method of filter membrane.
Background technology
Ultrafiltration is a kind of screening process, using the pressure differential of film both sides as driving force, using milipore filter as filter medium, certain Pressure under, when stoste flows through film surface, the densely covered many tiny micropores of ultrafiltration membrane surface only allow water and small molecule thing Matter by and as permeate, and volume is more than the material in film surface micropore footpath and is then trapped within the liquid feeding side of film in stoste, into For concentrate, thus realize the purpose of purification, separation and the concentration to stoste.In desalinization project, milipore filter group is when long Between during heavy-duty service, pressure difference and producing aqueous all can gradually be deteriorated.Carrying out Conventional Off-line Chemical cleaning to milipore filter can Restorability, but it is time-consuming very long.Cleaning duration can influence total aquifer yield of ultrafiltration technology section and influence full factory's aquifer yield.
The content of the invention
For above-mentioned problems of the prior art, the present invention provides a kind of cleaning of milipore filter in desalinization application Method, this method milipore filter scavenging period can be foreshortened to offline scavenging period 1/3rd even it is shorter, with the short time Chemistry safeguard and reach the effect cleaned offline.
To achieve the above object, the present invention provides following technical scheme：
The cleaning method of milipore filter, comprises the following steps in a kind of desalinization application：
(1) water is rinsed or chemistry strengthens backwash；
(2) pickling：Acidwash solution uses the citric acid solution or mass fraction of mass fraction 1% molten for 2-10% oxalic acid Liquid, it is preferred that the mass fraction 2% of oxalic acid solution；30-35 DEG C of water temperature；Pickling flow is 150-200m3/ h, when pickling is circulated Between be 1-2h；
(3) soak：After circulation terminates, soak time 1-2h, such as 1.5h, immersion solution are the Acidwash solution；
(4) water backwash or chemistry strengthen backwash.
Further, chemistry strengthens backwash flux 250LMH.
Further, during pickling, ph=2 is controlled.
Further, EDTA is also contained in the Acidwash solution.
EDTA content is 100ppm in further Acidwash solution
Beneficial effects of the present invention are as follows：
1st, the cleaning agent citric acid solution or oxalic acid solution that the present invention is used, and find the best concentration of effect, not only Cleaning agent is saved, and shortens the scavenging period of milipore filter；
2nd, the present invention adds EDTA into Acidwash solution, using EDTA complexing, remove metal on milipore filter from Son.
Embodiment
In order that those skilled in the art more fully understand technical scheme, technical scheme is entered below Clear, the complete description of row, based on the embodiment in the application, those of ordinary skill in the art are not making creative work On the premise of other class be the same as Examples for being obtained, should all belong to the scope of the application protection.
Embodiment one：
The cleaning method of milipore filter, comprises the following steps in desalinization application：
(1) water is rinsed or chemistry strengthens backwash；
(2) pickling：Acidwash solution uses the citric acid solution or mass fraction of mass fraction 1% molten for 2-10% oxalic acid Liquid；30-35 DEG C of water temperature；Pickling flow is 150-200m3/ h, pickling circulation time is 1-2h, ph=2；Also contain in Acidwash solution There is EDTA；
(3) soak：After circulation terminates, soak time 1-2h, immersion is Acidwash solution with solution；
(4) water backwash or chemistry strengthen backwash, and chemistry strengthens backwash flux 250lmh.
Pickling is concretely comprised the following steps：The Acidwash solution that ph is 2 is configured, variable-flow circulation, recycle stream are carried out to milipore filter group Measure 150m3/ h circulates flow in 15 minutes, 15 seconds and rises to 175m3/ h circulates flow in 15 minutes, 15 seconds and rises to 200m again3/ h is followed Ring 15 minutes, after flow is down to 150m in 25 seconds again3/ h, repeats circulation 1-2 hours.Variable-flow wash cycles milipore filter, energy The pollutant on milipore filter is enough removed using the shearing force of water, is reduced water consumption simultaneously.
Former milipore filter offline chemical cleaning overall process is needed 12 hours, and scavenging period of the invention foreshortens to original 1/3, pole Milipore filter scavenging period is reduced greatly, can effectively recover the performance of milipore filter, after film group is developed, you can quick input fortune In row, the on-line operation efficiency of milipore filter group is substantially increased.
In addition, reclaimed water of the present invention is rinsed, water backwash and chemistry reinforcement backwash are all existing conventional techniques, it is no longer detailed herein Repeat.
Embodiment two：
The cleaning method of milipore filter, comprises the following steps in a kind of desalinization application：
(1) water is rinsed, flow 175m3/ h is that the time is 15~30 minutes；
(2) pickling：Acidwash solution uses the citric acid solution of mass fraction 1%, 30 DEG C of water temperature；Pickling circulation time is 1h, ph=2；
(3) soak：After circulation terminates, soak time 1h, immersion solution is the Acidwash solution；
(4) chemistry strengthens backwash, and chemistry strengthens backwash flux 250LMH (rise/square m/h).
Pickling is concretely comprised the following steps：The Acidwash solution that ph is 2 is configured, variable-flow circulation, recycle stream are carried out to milipore filter group Measure 150m3/ h circulates flow in 15 minutes, 15 seconds and rises to 175m3/ h circulates flow in 15 minutes, 15 seconds and rises to 200m again3/ h is followed Ring 15 minutes, after flow is down to 150m in 25 seconds again3/ h, repeats the circulation 1 hour.
Embodiment three：
The cleaning method of milipore filter, comprises the following steps in a kind of desalinization application：
(1) chemistry strengthens backwash, and flux is 250LMH；
(2) pickling：Acidwash solution uses the oxalic acid solution of mass fraction 2%, while adding 100ppm EDTA；Water temperature 35 ℃；Pickling circulation time is 2h, ph=2；
(3) soak：After circulation terminates, soak time 2h, immersion solution is the Acidwash solution；
(4) water backwash, flux is 250LMH, and the time is 2 minutes.
Pickling is concretely comprised the following steps：The Acidwash solution that ph is 2 is configured, variable-flow circulation, recycle stream are carried out to milipore filter group Measure 150m3/ h circulates flow in 15 minutes, 15 seconds and rises to 175m3/ h circulates flow in 15 minutes, 15 seconds and rises to 200m again3/ h is followed Ring 15 minutes, after flow is down to 150m in 25 seconds again3/ h, repeats the circulation 2 hours.
Example IV：
The cleaning method of milipore filter, comprises the following steps in a kind of desalinization application：
(1) water is rinsed, and flow is 175m3/ h, the time is 15~30 minutes；
(2) pickling：Acidwash solution uses the oxalic acid solution of mass fraction 10%, 33 DEG C of water temperature；Pickling circulation time is 1.5h, ph=2；
(3) soak：After circulation terminates, soak time 1.5h, immersion solution is the Acidwash solution；
(4) water backwash, flux is 250LMH, and the time is 2 minutes.
Pickling is concretely comprised the following steps：The Acidwash solution that ph is 2 is configured, variable-flow circulation, recycle stream are carried out to milipore filter group Measure 150m3/ h circulates flow in 15 minutes, 15 seconds and rises to 175m3/ h circulates flow in 15 minutes, 15 seconds and rises to 200m again3/ h is followed Ring 15 minutes, after flow is down to 150m in 25 seconds again3/ h, repeats the circulation 1.5 hours.
The roughly the same milipore filter of pollution level is chosen, takes the method for embodiment two, three, four to be cleaned respectively, it is right Ultrafiltration film properties after cleaning are tested, as a comparison, and performance is tested when inventor also uses new milipore filter for the first time, As a result such as table 1：
Table 1
As can be seen from Table 1, the ultrafiltration film properties cleaned using the embodiment of the present invention two, three, four are recovered to new film substantially Level, the milipore filter cleaning method used time of the invention is short in addition, and water consumption is small, and cost is low.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped Containing an independent technical scheme, this narrating mode of specification is only that for clarity, those skilled in the art should Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art It may be appreciated other embodiment.

Claims (5)

1. the cleaning method of milipore filter in a kind of desalinization application, it is characterised in that comprise the following steps：
(1) water is rinsed or chemistry strengthens backwash；
(2) pickling：Acidwash solution uses the citric acid solution or mass fraction of mass fraction 1% for 2-10% oxalic acid solution, It is preferred that, the mass fraction 2% of oxalic acid solution；30-35 DEG C of water temperature；Pickling flow is 150-200m3/ h, pickling circulation time is 1-2h；
(3) soak：After circulation terminates, soak time 1-2h, such as 1.5h, immersion solution are the Acidwash solution；
(4) water backwash or chemistry strengthen backwash.
2. the cleaning method of milipore filter in desalinization application according to claim 1, it is characterised in that chemistry is strengthened anti- Wash flux 250LMH.
3. the cleaning method of milipore filter in desalinization application according to claim 1, it is characterised in that during pickling, control Ph=2 processed.
4. the cleaning method of milipore filter in desalinization application according to claim 1, it is characterised in that the pickling is molten Also contain EDTA in liquid.
5. the cleaning method of milipore filter in desalinization application according to claim 1, it is characterised in that in Acidwash solution EDTA content is 100ppm.
CN201710408376.XA 2017-06-02 2017-06-02 The cleaning method of milipore filter in a kind of desalinization application Pending CN107008155A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110605027A (en) * 2018-06-14 2019-12-24 中国石油化工股份有限公司 Alkaline cleaning solution, acidic cleaning solution and ultrafiltration membrane cleaning method
CN110871034A (en) * 2018-08-30 2020-03-10 中国石油化工股份有限公司 MBR plate-type membrane cleaning agent and cleaning method
US11502323B1 (en) 2022-05-09 2022-11-15 Rahul S Nana Reverse electrodialysis cell and methods of use thereof
US11502322B1 (en) 2022-05-09 2022-11-15 Rahul S Nana Reverse electrodialysis cell with heat pump
US11855324B1 (en) 2022-11-15 2023-12-26 Rahul S. Nana Reverse electrodialysis or pressure-retarded osmosis cell with heat pump
US12040517B2 (en) 2023-05-09 2024-07-16 Rahul S. Nana Reverse electrodialysis or pressure-retarded osmosis cell and methods of use thereof

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110605027A (en) * 2018-06-14 2019-12-24 中国石油化工股份有限公司 Alkaline cleaning solution, acidic cleaning solution and ultrafiltration membrane cleaning method
CN110605027B (en) * 2018-06-14 2022-03-15 中国石油化工股份有限公司 Alkaline cleaning solution, acidic cleaning solution and ultrafiltration membrane cleaning method
CN110871034A (en) * 2018-08-30 2020-03-10 中国石油化工股份有限公司 MBR plate-type membrane cleaning agent and cleaning method
CN110871034B (en) * 2018-08-30 2022-07-12 中国石油化工股份有限公司 MBR plate-type membrane cleaning agent and cleaning method
US11502323B1 (en) 2022-05-09 2022-11-15 Rahul S Nana Reverse electrodialysis cell and methods of use thereof
US11502322B1 (en) 2022-05-09 2022-11-15 Rahul S Nana Reverse electrodialysis cell with heat pump
US11563229B1 (en) 2022-05-09 2023-01-24 Rahul S Nana Reverse electrodialysis cell with heat pump
US11611099B1 (en) 2022-05-09 2023-03-21 Rahul S Nana Reverse electrodialysis cell and methods of use thereof
US11699803B1 (en) 2022-05-09 2023-07-11 Rahul S Nana Reverse electrodialysis cell with heat pump
US11855324B1 (en) 2022-11-15 2023-12-26 Rahul S. Nana Reverse electrodialysis or pressure-retarded osmosis cell with heat pump
US12040517B2 (en) 2023-05-09 2024-07-16 Rahul S. Nana Reverse electrodialysis or pressure-retarded osmosis cell and methods of use thereof

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