CN101730577A - The operation method of purifier - Google Patents
The operation method of purifier Download PDFInfo
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- CN101730577A CN101730577A CN200880023560A CN200880023560A CN101730577A CN 101730577 A CN101730577 A CN 101730577A CN 200880023560 A CN200880023560 A CN 200880023560A CN 200880023560 A CN200880023560 A CN 200880023560A CN 101730577 A CN101730577 A CN 101730577A
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- water
- stream
- filter unit
- membrane filter
- former water
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- 238000000034 method Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 217
- 239000012528 membrane Substances 0.000 claims abstract description 115
- 238000000746 purification Methods 0.000 claims abstract description 58
- 238000011001 backwashing Methods 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 239000012510 hollow fiber Substances 0.000 claims description 37
- 238000004140 cleaning Methods 0.000 claims description 19
- 230000010354 integration Effects 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims 1
- 239000000463 material Substances 0.000 description 22
- 230000000694 effects Effects 0.000 description 8
- 239000007789 gas Substances 0.000 description 6
- 239000012141 concentrate Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000005374 membrane filtration Methods 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920005749 polyurethane resin Polymers 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- DPJRMOMPQZCRJU-UHFFFAOYSA-M thiamine hydrochloride Chemical compound Cl.[Cl-].CC1=C(CCO)SC=[N+]1CC1=CN=C(C)N=C1N DPJRMOMPQZCRJU-UHFFFAOYSA-M 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/02—Hollow fibre modules
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2317/00—Membrane module arrangements within a plant or an apparatus
- B01D2317/04—Elements in parallel
-
- 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
- B01D2321/12—Use of permeate
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides a kind of operation method of purifier, wherein, film cleans operation and comprises: the operation of the former water of the primary side of first membrane filter unit (7) being carried out drawing liquid through draining stream (9); Carry out the operation of the contrary water flowing of following exhaust: in the inside of the primary side of first membrane filter unit (7) under the state of atmosphere opening, supply with stream (2) from main former water and only supply with former water, water after the inside of primary side is full of back washing is supplied with and made to thus obtained water purification from the secondary side of first membrane filter unit (7) to the primary side of second membrane filter unit (8); And the operation of carrying out following contrary water flowing: will supply with stream (2) from main former water and only supply with former water and the water purification that obtains is supplied with from the secondary side of first membrane filter unit (7), and the water after the back washing of inside of primary side is discharged from draining stream (9) to the primary side of second membrane filter unit (8).
Description
Technical field
The present invention relates to a kind of operation method of purifier.
The patent application 2007-178847 number opinion priority that the application proposed to the Japan Patent Room based on July 6th, 2007, and with its content quotation so far.
Background technology
In the past, known have be installed in pipe arrangements such as water-supply line midway and carry out the purifier of membrane filtration.In this purifier, when films such as mesh obstruction carry out incrustation, need change film.Especially be not good area in water environment, the replacing frequency of film is higher, therefore in the load of environment, the operation and burden economically etc. bigger.In order to prolong the life-span of film, there is following purifier: connect two filter elements side by side, make water purification that filter element discharges from the secondary side of the film of another filter element to the contrary water flowing of primary side, promptly carry out so-called back washing, the obstruction material attached to the primary side of film is peeled off cleaning (for example referring to Patent Document 1).
Yet in above-mentioned purifier, there are the following problems: make when peeling off attached to the part of the obstruction material of primary side by back washing, the caused water flowing of back washing concentrates on this part, so the obstruction material of other parts can not be peeled off fully.
Patent documentation 1: Japanese kokai publication hei 11-137976 communique
Summary of the invention
The problem that invention will solve
Problem of the present invention is, a kind of operation method of purifier is provided, and the obstruction material that it could fully peel off and remove the film surface alleviates the burden of film.
Be used to solve the means of problem
The present invention is a kind of operation method of purifier, this purifier can move usually respectively with film and clean operation, it constitutes, on main former water supply stream, be connected with first membrane filter unit and second membrane filter unit that former water is carried out membrane filtration, make the secondary side interflow of the secondary side of these first membrane filter units and second membrane filter unit and be connected with main water purification stream, the primary side of supplying with first membrane filter unit of stream at the former water of described master connects the draining stream, the inside of the primary side of first membrane filter unit can be to atmosphere opening, it is characterized in that film cleans operation and comprises: the operation of the former water of the primary side of first membrane filter unit being carried out drawing liquid through the draining stream; Carry out the operation of the contrary water flowing of following exhaust: in the inside of the primary side of first membrane filter unit under the state of atmosphere opening, supply with stream from main former water and only supply with former water and filter, water after the inside of primary side is full of back washing is supplied with and made to thus obtained water purification from the secondary side of first membrane filter unit to the primary side of second membrane filter unit; And the operation of carrying out following contrary water flowing: will supply with stream from main former water and only supply with former water and the water purification that obtains is supplied with from the secondary side of first membrane filter unit, and the water after the back washing of inside of primary side is discharged from the draining stream to the primary side of second membrane filter unit.
Described first membrane filter unit is a hollow fiber membrane, also the outside that constitutes the macaroni yarn of this hollow fiber membrane can be set at primary side, and the inboard of described macaroni yarn is set at secondary side.
Also can based on following some at least conditions to described film clean operation begin judge: the integrated flow of the described main water purification path when the former water of described master the when pressure of the described main water purification path when the former water of described master during described common operation is supplied with the pressure of stream, described common operation, described common operation is supplied with the integrated flow of stream, described common operation and the integration time of described common operation.
Also can clean operation: the integrated flow of the described main water purification path when the former water of described master the when pressure of the described main water purification path when the former water of described master during described common operation is supplied with the pressure of stream, described common operation, described common operation is supplied with the integrated flow of stream, described common operation and the integration time of described common operation based on the described film that following some at least conditions be carried out stipulated number.
Described stipulated number also can be at least more than twice, and these films cleaning operations are not carried out with not being inserted with common operation continuously.
Described common operation also can comprise from main former water and supply with the operation that stream is only supplied with former water and this former water is filtered, through main water purification stream water purification discharged from the secondary side of first membrane filter unit to the primary side of first membrane filter unit.
The effect of invention
Adopt the operation method of purifier of the present invention, when carrying out film cleaning operation, make the water purification of discharging from second membrane filter unit from the secondary side of first membrane filter unit before the contrary water flowing of primary side, by carrying out the contrary water flowing of drawing liquid and exhaust, can be water purification at the secondary side of the film of first membrane filter unit, primary side is to carry out contrary water flowing under the state of atmosphere, therefore can increase the intermembranous pressure reduction of secondary side and primary side in the whole zone of film, therefore the mobile part that concentrates on hollow fiber membrane of the caused water of non-return water flowing can be prevented, thereby the obstruction material of removal can be peeled off efficiently attached to the primary side of film.
And, for example, when the inboard with macaroni yarn is set in the primary side of film, it is higher that the material of once peeling off by contrary water flowing and the inner surface of macaroni yarn contact the possibility of adhering to once more, but be set in primary side by outer surface with macaroni yarn, therefore the tamper mass-energy of the peeling off macaroni yarn that enough speeds away can prevent to stop up material once more attached on the macaroni yarn.
Can infer the blocked state of film based on following some at least conditions: the former water of the master when moving is usually supplied with the former water of pressure, the pressure of the main water purification path when moving usually, the master when moving usually of stream and is supplied with the integrated flow of stream, the integrated flow of the main water purification path when moving usually and the integration time of moving usually, therefore has the effect of the cleaning operation that can begin film at the corresponding appropriate time of inaccessible degree with film.And, owing to can infer the chocking-up degree of film, therefore can change the number of times that film cleans operation according to this chocking-up degree.Therefore, for example, increase wash number in the time of can worsening in the obstruction of film, therefore have and to remove the effect of stopping up material more reliably.
The number of times that cleans operation when film is repeatedly the time, carries out the situation that film cleans operation continuously and compares with the situation that hocket operation usually and film clean operation, has the effect that can shorten to the time till the obstruction material is removed.
Because described common operation has the operation of only supplying with former water and water purification being discharged through main water purification stream from secondary side to the primary side of first membrane filter unit, therefore has the effect that the obstruction material of primary side can be removed efficiently.
Description of drawings
Fig. 1 is the summary structure chart of the purifier of example of the present invention.
The summary structure chart that is equivalent to Fig. 1 when Fig. 2 is the filtered model of example of the present invention.
The summary structure chart that is equivalent to Fig. 1 when Fig. 3 is the drawing liquid pattern of example of the present invention.
The summary structure chart that is equivalent to Fig. 1 when Fig. 4 is the contrary water flowing pattern of the exhaust of example of the present invention.
The summary structure chart that is equivalent to Fig. 1 when Fig. 5 is the contrary water flowing pattern of example of the present invention.
Symbol description
2 main former water are supplied with stream
7 first membrane filter units
8 second membrane filter units
9 draining streams
11 hollow fiber membranes
19 main water purification streams
The specific embodiment
Below, referring to figs. 1 through Fig. 5 one example of example of the present invention is described.
Fig. 1 is the purifier 1 that is used to filter former water.According to employed area, rivers and creeks water, lakes and marhshes water, well water, water for industrial use etc. are supplied to as former water by water channel.Supply with on the stream 2 at the former water of the master of purifier 1, the pump 3 that is used for water channel hydraulic pressure is carried out supercharging is installed, and the pressure-reducing valve 4 downstream, that be used to make the stable water pressure that pump 3 exported that is located at this pump 3.In addition, the pump 3 of supercharging not necessarily needs operation, and, when the feed pressure of former water is high, also pump 3 can be set.
Supply with on the stream 2 at main former water, branch is connected with the 1st former water and supplies with stream 5 and the 2nd former water supply stream 6.On the 1st former water supply stream 5, be connected with the 1st membrane filter unit 7, supply with on the stream 5 at the 2nd former water and be connected with the 2nd membrane filter unit 8.The former water of master between the branch point that the branch point and the 2nd former water of the 1st former water supply stream 5 are supplied with stream 6 is supplied with on the stream 2 the 1st control valve V1 is installed, by the 1st control valve V1 is carried out open and close controlling, can supply with the supply of stream 5 and stop to switch to the 1st former water former water.Main former water is supplied with stream 2 and is connected with draining stream 9, and this draining stream 9 is communicated with not shown discharge outlet, and draining stream 9 sides at the branch point of the 1st former water supply stream 5 are equipped with the 2nd control valve V2.
The 1st membrane filter unit 7 has the tubular shell 10 of two ends obturation, in this housing 10, contains the hollow fiber membrane 11 that is made of the hollow tow.The embedding part 12 on the top of this hollow fiber membrane 11 by being configured in housing 10 cuts off as the former water side of primary side with as the water purification side of secondary side.Embedding part 12 is made of polyurethane resin, epoxy resin, vistanex etc.
The effect of supply and exhaust mouth 16 is, when supplying with stream 5, main former water by the 1st former water and supply with outside the system that former water that stream 2 and draining stream 9 will remain in hollow fiber membrane 11 primary sides in the housing 10 is discharged to purifier 1, gases such as atmosphere are entered in the housing 10, and during the water after being full of back washing described later in the housing 10 of the primary side of hollow cortina 11, the gases in the housing 10 are discharged.On this supply and exhaust mouth 16, be connected with for exhaust flow path 17, this end that supplies exhaust flow path 17 is to atmosphere opening.Water after the back washing is meant, cleans the water of the primary side backward current road discharge of hollow fiber membrane 11 by contrary water flowing.
For on the exhaust flow path 17, the 3rd control valve V3 that opens and closes for exhaust flow path 17 is installed.And, supplying on the exhaust flow path 17, distolateral in the opening of the 3rd control valve V3, branch is connected with drainpipe 17a.When drainpipe 17a, water after being full of back washing in the housing 10 of the 1st membrane filter unit 7 primary sides, the water after the back washing that will overflow from supply and exhaust mouth 16 is delivered to draining stream 9.
In the outlet 14 of the 1st filter membrane unit 7, be connected with the 1st interflow stream 18, the 1 interflow streams 18 and be connected with main water purification stream 19 interflow, this main water purification stream 19 is supplied with the processing water (water purification) that forms after the former water treatment.
On the other hand, the 2nd membrane filter unit 8, identical with above-mentioned the 1st membrane filter unit 7, comprise the housing 22 that has inlet 20 and outlet 21 respectively, the embedding part 23 that constitutes by polyurethane resin, epoxy resin, vistanex etc., and the hollow fiber membrane 24 that cuts off water purification sides and former water side by embedding part 23.In Fig. 1, the 2nd membrane filter unit 8 only uses when the film of the 1st membrane filter unit 7 cleans, and therefore, adopts the structure littler than the 1st membrane filter unit 7, but also can use the structure identical with the 1st membrane filter unit 7.
In the outlet 21 of the 2nd membrane filter unit 8, identical with the outlet 14 of the 1st membrane filter unit 7, be connected with the 2nd interflow stream 25, the 2 interflow streams 25, be connected with main water purification stream 19 interflow with the junction of two streams of main water purification stream 19 at the 1st interflow stream 18.That is to say that above-mentioned the 1st membrane filter unit 7 and the 2nd membrane filter unit 8 are supplied with connection side by side between stream 2 and the main water purification stream 19 at main former water.On the 2nd interflow stream 25, the 4th control valve V4 that the 2nd interflow stream 25 is opened and closed is installed.
Main water purification stream 19 is that the processing water (water purification) that is used for forming after the former water treatment passes out to the stream outside the system of purifier 1, at this main water purification stream 19 midway, the check-valves 26 of the adverse current that prevents to handle water is installed, in addition, on the main water purification stream 19 in the downstream of this check-valves 26, be provided with the 5th control valve V5 that main water purification stream 19 is opened and closed.
Above-mentioned the 1st～the 5th control valve V1～V5 is connected with the control part 27 that the switching of these the 1st～the 5th control valve V1～V5 is controlled.On control part 27, be connected with pressure gauge s1 that the pressure of main former water supply stream 2 is measured and the pressure gauge s2 that the pressure of main water purification stream 19 is measured.
And, control part 27, according to the degree of the pressure of being measured by pressure gauge s1, be the degree of incrustation, the number of times that continuous enforcement film is cleaned operation carries out changeable ground and sets (the following film that only is called cleans the enforcement number of times that moves).Here, clean the enforcement number of times of operation, for example can be stored in the control part 27 in advance, determine by the mapping table (not shown) of enforcement number of times that pressure and film cleaning are moved with reference to this mapping table with the corresponding film of the degree of above-mentioned pressure.In addition, identical with the situation of above-mentioned pressure gauge s1, flowmeter can be set, supply with the integrated flow of stream 2 or main water purification stream 19 according to main former water, that carries out that film cleans operation begins to judge the decision of cleaning the enforcement number of times of operation with film, in addition, and except integrated flow, pressure, if measure the integration time of the filtered model (aftermentioned) of operation usually, also can begin to judge the decision of cleaning the enforcement number of times of operation with film based on what carry out that film cleans operation this integration time.In addition, the number of times of above-mentioned continuous enforcement also comprises situation about promptly not implementing continuously for 0 time.
The example of open and close controlling of the 1st～the 5th control valve V1～V5 that running status during the common operation that will control in control part 27 and the film that constitutes hollow fiber membrane 11 clean every kind of the running status (hereinafter referred to as pattern) of operation is expressed as following table.
[table 1]
| Running status | Service condition | ??V1 | ??V2 | ??V3 | ??V4 | ??V5 |
| Filter | 60 minutes | Open | Close | Close | Close | Open |
| Drawing liquid | 15 seconds | Close | Close | Open | Open | Close |
| The contrary water flowing of |
15 seconds | Close | Open | Close | Open | Close |
| Contrary water flowing | 45 seconds | Close | Open | Open | Close | Close |
As the obstruction material that stops up hollow fiber membrane 11, have from distribution reservoir to arrive the suspended solid of the iron filings etc. of purifier 1, be polysaccharide etc. from the metabolin of the microorganism the former water.Here, the 1st～the 5th control valve V1～V5 can use motor-driven valve, magnetic valve, air valve etc. by opening and closing the signal automatic shutter.Especially from economy, preferably use magnetic valve.
Next, with reference to Fig. 2～Fig. 5, the effect of the various patterns controlled by control part 27 is described.In addition, in Fig. 2～Fig. 5, the 1st～the 5th control valve V1～V5 represents closed condition with blacking, represents open mode with blank.
The state of a control of the purifier 1 of the filtered model during common operation that Fig. 2 represents to control by control part 27.This filtered model is that the user uses the pattern when handling water.At first, the user opens the water channel tap, begins to handle the use of water, in the 1st of full-shut position standby～the 5th control valve V1～V5 (with reference to Fig. 1), the 1st control valve V1 and the 5th control valve V5 is controlled to be open mode.At this moment, the 2nd control valve V2, the 3rd control valve V3 and the 4th control valve V4 are maintained closed condition.In addition, when standby, can the 1st～the 5th control valve V1～V5 be maintained full-shut position yet, and with the state of a control standby of filtered model.
In filtered model, flow into the former water of purifier 1, undertaken after pressure adjusts by at least one of pump 3 and pressure-reducing valve 4, supply with stream 2 from main former water and supply with stream 5 through the 1st former water and flow into the inlet 13 of the 1st membrane filter unit 7 and flow in the housing 10, flow to secondary side and filter from the primary side of hollow fiber membrane 11.The former water that is filtered is as handling water (water purification), sends to the outside through the 1st interflow stream 18 and main water purification stream 19 from the outlet 14 of the 1st membrane filter unit 7.
Fig. 3～Fig. 5 represents that respectively the film that carries out according to the control instruction of control part 27 cleans the state of a control of purifier 1 of each pattern of operation.Each pattern of this film cleaning operation is preferably in the user and uses the little time period of possibility of water purification to carry out.In addition, the film beginning of cleaning operation preferably constitutes and can select from following condition: the common operation of purifier 1 is that the concluding time of the integration time of filtered model (for example about 60 minutes), predefined filtered model, the hollow fiber membrane 11 that do not use the time period of water purification or detect the 1st membrane filter unit 7 carry out incrustation and when making main former water supply with the flow of stream 2 or main water purification stream 19 or pressure to reduce etc.
Fig. 3 represents that film cleans the state of a control of the purifier 1 of the drawing liquid pattern of carrying out at first in each pattern of operation.In this drawing liquid pattern, keep that the 2nd control valve V2 and the 3rd control valve V3 open, the 1st control valve V1, the 4th control valve V4 and the 5th control valve V5 closing state stipulated time (for example about 15 seconds).Therefore, when beginning drawing liquid pattern, extraneous gas imports from supply and exhaust mouth 16, remains in the Xia Yuanshui of primary side of the hollow fiber membrane 11 of the 1st membrane filter unit 7, under the effect of gravity through under former water supply with stream 5 and main former water and supply with stream 2 and outside system, discharge.Former water is meant the former water of the vertical lower side that remains in the 1st membrane filter unit 7 down.
Fig. 4 represents the state of a control of the purifier 1 of the contrary water flowing pattern of the exhaust carried out after the drawing liquid pattern.In the contrary water flowing pattern of this exhaust, keep that the 3rd control valve V3 and the 4th control valve V4 open, the 1st control valve V1, the 2nd control valve V2 and the 5th control valve V5 closing state stipulated time (for example about 15 seconds).Therefore, when the contrary water flowing pattern of beginning exhaust, flow into the former water of purifier 1, undertaken after pressure adjusts by at least one of pump 3 and pressure-reducing valve 4, supply with stream 2 and the 2nd former water is supplied with stream 6 through main former water, 20 flow in the 2nd membrane filter unit 8 and filter by hollow fiber membrane 24 from entering the mouth.
Send from exporting 21 by the water purification that the 2nd membrane filter unit 8 filters, flow into the 1st membrane filter unit 7 from exporting 14 through the 2nd interflow stream 25 and the 1st interflow stream 18.Then, the water purification that flows into the 1st membrane filter unit 7 from the secondary side of hollow fiber membrane 11 to the contrary water flowing of gassiness primary side.Should close in the housing 10 that is trapped in the 1st membrane filter unit owing to the 2nd control valve V2 against the water after the back washing of water flowing, its water level rises gradually.Along with the rising of this water level, the gas in the housing 10 is discharged via confession exhaust flow path 17 by supply and exhaust mouth 16.Here, discharge as much as possible in order to make the gas in the housing 10, the water after the back washing in the housing 10 is discharged and is flowed down to draining stream 9 through drainpipe 17a from supply and exhaust mouth 16.In addition, in the water after the back washing that in the housing 10 of the primary side of hollow fiber membrane 11, is full of, contain from the obstruction material of the sur-face peeling of hollow fiber membrane 11.
Fig. 5 represents the state of a control of the purifier 1 of the contrary water flowing pattern of carrying out after the contrary water flowing pattern of exhaust.In this contrary water flowing pattern, keep that the 2nd control valve V2 and the 4th control valve V4 open, the 1st control valve V1, the 3rd control valve V3 and the 5th control valve V5 closing state stipulated time (for example about 45 seconds).Therefore, when the contrary water flowing pattern of beginning, flow into the former water of purifier 1, carry out after hydraulic pressure adjusts by pump 3 pressurizations with by pressure-reducing valve 4, supply with stream 6 in 20 inflows the 2nd membrane filter unit 8 that enters the mouth through main former water supply stream 2 and the 2nd former water, filter by hollow fiber membrane 24.
Send from exporting 21 by the water purification that the 2nd membrane filter unit 8 filters, flow into the 1st membrane filter unit 7 from exporting 14 through the 2nd interflow stream 25 and the 1st interflow stream 18.Then, the water purification that flows into the 1st membrane filter unit 7 from the secondary side of hollow fiber membrane 11 to the contrary water flowing of water-filled primary side.By this contrary water flowing, the obstruction material on hollow fiber membrane 11 surfaces is further removed, and prevent to stop up material once more attached to the state on the hollow fiber membrane 11 under, be full of in the housing 10, contain that water after the back washing of stopping up material is supplied with stream 2 through main former water and draining stream 9 is discharged outside system.Here, remain in bubble in the housing 10 etc. also the water after back washing outside system, discharge, the result even film carries out filtered model after cleaning end of run, also can suppress bubble and sneak in the water purification of supplying with through main water purification stream 19.
Control part 27, after the film that finishes to be made of above-mentioned each pattern cleans operation, control with filtered model, if result's ratio of being measured by pressure gauge s1 at this moment will carry out film cleaning operation and predefined authorized pressure height in order to judge whether, the film cleaning that then is judged as hollow fiber membrane 11 is insufficient, implements above-mentioned film once more and cleans operation.Control part 27 although when the film cleaning operation of having implemented predefined stipulated number, still be judged as in the time of need carrying out film cleaning operation, be judged as on purifier 1 and certain unusual situation take place and the enforcement of stopper film cleaning operation.And before the above-mentioned film of beginning cleaned operation, control part 27 was judged the degree of incrustation according to the measurement result of pressure gauge s1, implements the number of times that film cleans operation according to the degree decision of this incrustation, and the film of implementing this number of times cleans operation.In addition, at this moment, as mentioned above, except gaging pressure, also can be provided with to the integrated flow of filtered model or the measuring unit of measuring integration time (not shown), according to the data that record by this measuring unit, degree to incrustation predicts that the number of times that film cleans operation is implemented in decision.
Here, when the degree of incrustation was higher, the number of times that preferably film is cleaned operation was made as more than 2 times, and cleaned at these films and not insert common operation between the operation and implement film continuously and clean operation.This is because after carrying out the contrary contrary water flowing certain hour of water flowing pattern, in case stop to turn back to the pattern of drawing water once more from the 2nd filter element supply water purification, that just can feed water mobilely brings variation.This mobile variation causes film is applied power such as inertia force, can more effectively remove the lip-deep obstruction material of film thus.In other words, this preferred methods is not the method that prolongs the running time of each pattern of cleaning, but has the method for higher film cleaning performance.
Therefore, adopt above-mentioned example, before the water purification that carries out the 2nd membrane filter unit 8 is discharged is from the contrary water flowing of the secondary side of the hollow fiber membrane 11 of the 1st membrane filter unit 7 to the contrary water flowing pattern of primary side, carry out the contrary water flowing pattern of drawing liquid pattern and exhaust, thereby can be water purification at the secondary side of the hollow fiber membrane 11 of the 1st membrane filter unit 7, primary side is to carry out contrary water flowing under the state of gas, therefore, can increase the intermembranous pressure reduction between secondary side and the primary side in the whole zone of hollow fiber membrane 11, its result can prevent the mobile part that concentrates on hollow fiber membrane 11 of the water that non-return water flowing brings, thereby can peel off the obstruction material of removal attached to the primary side of hollow fiber membrane 11 effectively by contrary water flowing.
And, when the inboard with hollow fiber membrane 11 is set in the primary side of film, it is higher that the material of once being stripped from by contrary water flowing and the inner surface of macaroni yarn contact the possibility of adhering to once more, but be set in primary side by outer surface with hollow fiber membrane 11, therefore the tamper mass-energy of the peeling off macaroni yarn that enough speeds away can prevent to stop up material once more attached on the macaroni yarn.
In addition, when the pressure ratio authorized pressure of leading former water supply stream 2 is high, the degree that can rise according to this pressure, promptly attached to the degree of the obstruction material of the primary side of the hollow fiber membrane 11 of the 1st membrane filter unit 7, change the number of times that film cleans operation, therefore can remove the obstruction material more reliably.
And, in above-mentioned example, the situation that begins to judge, determine film to clean the enforcement number of times of operation of the measurement result of supplying with the pressure gauge s1 of stream 2 according to main former water being carried out film cleaning operation is illustrated, but also can carry out according to the measured pressure of the pressure gauge s2 of main water purification stream 19.At this moment, when the pressure of being measured by pressure gauge s2 is lower than predefined authorized pressure, can be estimated as and carries out incrustation.
Claims (6)
1. the operation method of a purifier; This purifier can usually move respectively with film and clean operation; It constitutes; Be connected with the first membrane filter unit and the second membrane filter unit that former water is carried out the film filtration on main former water supply flow road; The secondary side that makes these the first membrane filter units be connected the secondary side interflow of membrane filter unit and be connected with main water purification stream road; A side at first membrane filter unit on the former water supply flow of described master road connects draining stream road; The within of a side of the first membrane filter unit is to atmosphere opening; It is characterized in that
Film cleans operation and comprises:
The former water of the primary side of first membrane filter unit is carried out the operation of drawing liquid through the draining stream;
Carry out the operation of the contrary water flowing of following exhaust: in the inside of the primary side of first membrane filter unit under the state of atmosphere opening, supply with stream from main former water and only supply with former water and filter, water after the inside of primary side is full of back washing is supplied with and made to thus obtained water purification from the secondary side of first membrane filter unit to the primary side of second membrane filter unit; And
Carry out the operation of following contrary water flowing: will supply with stream from main former water and only supply with former water and the water purification that obtains is supplied with from the secondary side of first membrane filter unit, and the water after the back washing of inside of primary side is discharged from the draining stream to the primary side of second membrane filter unit.
2. the operation method of purifier as claimed in claim 1 is characterized in that, described first membrane filter unit is a hollow fiber membrane, and the outside that constitutes the macaroni yarn of this hollow fiber membrane is set at primary side, and the inboard of described macaroni yarn is set at secondary side.
3. the operation method of purifier as claimed in claim 1, it is characterized in that, based on following some at least conditions to described film clean operation begin judge: the integrated flow of the described main water purification path when the former water of described master the when pressure of the described main water purification path when the former water of described master during described common operation is supplied with the pressure of stream, described common operation, described common operation is supplied with the integrated flow of stream, described common operation and the integration time of described common operation.
4. the operation method of purifier as claimed in claim 1, it is characterized in that the described film that carries out stipulated number based on following some at least conditions cleans operation: the integrated flow of the described main water purification path when the former water of described master the when pressure of the described main water purification path when the former water of described master during described common operation is supplied with the pressure of stream, described common operation, described common operation is supplied with the integrated flow of stream, described common operation and the integration time of described common operation.
5. the operation method of purifier as claimed in claim 4 is characterized in that, described stipulated number is at least more than twice, and these films cleaning operations are not carried out with not being inserted with common operation continuously.
6. the operation method of purifier as claimed in claim 1, it is characterized in that, described common operation comprises from main former water and supplies with the operation that stream is only supplied with former water and this former water is filtered, through main water purification stream water purification discharged from the secondary side of first membrane filter unit to the primary side of first membrane filter unit.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP178847/2007 | 2007-07-06 | ||
| JP2007178847 | 2007-07-06 | ||
| PCT/JP2008/062224 WO2009008386A1 (en) | 2007-07-06 | 2008-07-04 | Operating method of water purifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101730577A true CN101730577A (en) | 2010-06-09 |
| CN101730577B CN101730577B (en) | 2012-11-21 |
Family
ID=40228557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008800235601A Expired - Fee Related CN101730577B (en) | 2007-07-06 | 2008-07-04 | Operating method of water purifier |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5280204B2 (en) |
| CN (1) | CN101730577B (en) |
| WO (1) | WO2009008386A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106186189A (en) * | 2016-07-20 | 2016-12-07 | 珠海格力电器股份有限公司 | Water purifier flushing method and device |
| CN113453789A (en) * | 2019-02-26 | 2021-09-28 | 东丽株式会社 | Method for operating membrane filtration unit and membrane filtration unit |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5420450B2 (en) * | 2010-03-01 | 2014-02-19 | 旭化成ケミカルズ株式会社 | Filtration device |
| JP5048140B2 (en) * | 2010-09-08 | 2012-10-17 | シャープ株式会社 | Water purifier |
| KR20130135853A (en) * | 2010-10-27 | 2013-12-11 | 도레이 카부시키가이샤 | Hollow fiber membrane filtration device and method for washing hollow fiber membrane module |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62163708A (en) * | 1986-01-13 | 1987-07-20 | Ebara Corp | Method for backwashing hollow yarn filter |
| FR2674448B1 (en) * | 1991-03-26 | 1994-03-25 | Dumez Lyonnaise Eaux | METHOD FOR CLEANING MESOPOROUS TUBULAR MEMBRANES OF ULTRAFILTRATION. |
| JP3013646B2 (en) * | 1993-02-09 | 2000-02-28 | 東レ株式会社 | Filtration device |
| JPH09138298A (en) * | 1995-11-16 | 1997-05-27 | Hitachi Ltd | Filter using hollow-fiber membrane and method for backwashing it |
| JPH11137976A (en) * | 1997-11-07 | 1999-05-25 | Nikkiso Co Ltd | Filter device |
| CN1140324C (en) * | 1998-07-21 | 2004-03-03 | 东丽株式会社 | Method for inhibiting growth of bacteria or sterilizing around separating membrane |
| DE10045227C1 (en) * | 2000-09-13 | 2002-02-07 | Vosenkaul Klaus | Membrane filter for water treatment uses capillary membrane fibre bundle projecting into untreated water and fitting into permeate collection space at opposite end |
| AU2003242263A1 (en) * | 2002-08-29 | 2004-03-29 | Organo Corporation | Separation membrane module and method of operating separation membrane module |
| JP4228732B2 (en) * | 2003-03-14 | 2009-02-25 | 栗田工業株式会社 | Ultrapure water production system |
| US20050067341A1 (en) * | 2003-09-25 | 2005-03-31 | Green Dennis H. | Continuous production membrane water treatment plant and method for operating same |
-
2008
- 2008-07-04 JP JP2008535815A patent/JP5280204B2/en not_active Expired - Fee Related
- 2008-07-04 WO PCT/JP2008/062224 patent/WO2009008386A1/en active Application Filing
- 2008-07-04 CN CN2008800235601A patent/CN101730577B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106186189A (en) * | 2016-07-20 | 2016-12-07 | 珠海格力电器股份有限公司 | Water purifier flushing method and device |
| CN113453789A (en) * | 2019-02-26 | 2021-09-28 | 东丽株式会社 | Method for operating membrane filtration unit and membrane filtration unit |
| CN113453789B (en) * | 2019-02-26 | 2023-06-20 | 东丽株式会社 | Method for operating membrane filtration unit and membrane filtration unit |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009008386A1 (en) | 2009-01-15 |
| CN101730577B (en) | 2012-11-21 |
| JP5280204B2 (en) | 2013-09-04 |
| JPWO2009008386A1 (en) | 2010-09-09 |
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