CN101053773A - Method for operating separation membrane module - Google Patents
Method for operating separation membrane module Download PDFInfo
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- CN101053773A CN101053773A CNA2007100844823A CN200710084482A CN101053773A CN 101053773 A CN101053773 A CN 101053773A CN A2007100844823 A CNA2007100844823 A CN A2007100844823A CN 200710084482 A CN200710084482 A CN 200710084482A CN 101053773 A CN101053773 A CN 101053773A
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- water
- former water
- separating film
- film module
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- 239000012528 membrane Substances 0.000 title abstract description 113
- 238000000926 separation method Methods 0.000 title abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 616
- 239000010409 thin film Substances 0.000 claims abstract description 43
- 230000002093 peripheral effect Effects 0.000 claims abstract description 9
- 239000010408 film Substances 0.000 claims description 184
- 238000011010 flushing procedure Methods 0.000 claims description 122
- 230000004888 barrier function Effects 0.000 claims description 89
- 238000009792 diffusion process Methods 0.000 claims description 89
- 239000012466 permeate Substances 0.000 claims description 85
- 238000012546 transfer Methods 0.000 claims description 23
- 238000005406 washing Methods 0.000 abstract description 19
- 238000001223 reverse osmosis Methods 0.000 description 101
- 239000000463 material Substances 0.000 description 97
- 230000000694 effects Effects 0.000 description 28
- 230000000052 comparative effect Effects 0.000 description 26
- 238000012545 processing Methods 0.000 description 18
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- 238000011084 recovery Methods 0.000 description 10
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- 238000004140 cleaning Methods 0.000 description 7
- 210000004400 mucous membrane Anatomy 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000007812 deficiency Effects 0.000 description 5
- 238000010612 desalination reaction Methods 0.000 description 5
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- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
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- 241000272517 Anseriformes Species 0.000 description 3
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Images
Classifications
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- 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
- B01D61/58—Multistep processes
-
- 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
- B01D63/10—Spiral-wound membrane 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
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/10—Specific supply elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/12—Specific discharge elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/18—Specific valves
-
- 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
- B01D2321/20—By influencing the flow
- B01D2321/2083—By reversing the flow
-
- 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
- B01D2321/40—Automatic control of cleaning processes
Abstract
The invention provides an operation method for a separation membrane component. The separation membrane component is provided with a spiral type thin film element which is composed of a sacculated separation membrane and a raw water separating piece which are winded onto the peripheral surface of a permeable water collecting pipe together, wherein, the flow direction of the raw water of the separation membrane component is regularly or aperiodically changed oppositely. Additionally, washing is carried out when the flow direction of the raw water is changed and the primary washing of each washing is carried out oppositely to the original flow direction of the raw water.
Description
The application be that June 11, application number in 2003 are 03806884.2 the applying date, denomination of invention divides an application for the application of " method of operation of separating film module and separating film module ".
Technical field
The present invention relates to remove expeditiously the separating film module that is accumulated in the turbid material on the former water separator that is wound up on the screw type thin-film component and the method for operation of separating film module.
Background technology
In the prior art, as the method that obtains water in desalinization, ultra-pure water, the various manufacture process, as the screw type thin-film component that sees through film, the method for isolating ions composition and low molecular composition is known from former water with reverse osmosis membrane (RO film) or nano-filtration membrane (NF film) in utilization.In addition, at separate low molecular and even macromolecule component, perhaps in low molecular composition and even macromolecule component, only separate the ultrafiltration of macromolecule component, and in the secondary filter method of separate fine particle, also use the screw type thin-film component.Shown in the example of Fig. 8, an example of the screw type thin-film component that uses in the prior art is to constitute like this: by on two faces that reverse osmosis membrane 81 overlapped onto permeate water separator 82 and three limits are bonded together, thereby shape pouch film 83, the peristome of this bag shape film 83 is installed on the permeate water collector pipe 84, with netted former water separator 85, curl is wound up on the outer peripheral face of permeate water collector pipe 84.Thereby supply former water 86 from the end face side 89a of a side of screw type thin-film component 80, flow, be discharged from as condensed water 88 from the end face side 89b of the opposite side of screw type thin-film component 80 along former water separator 85.In former water separator 85 process of flowing, see through reverse osmosis membrane 81 at former water 86, become permeate water 87, this permeate water 87 flow into the inside of permeate water collector pipe 84 along permeate water separator 82, is discharged from from the end of permeate water collector pipe 84.Like this, the former water separator 85 by between the bag shape film 83 that is configured in coiling forms former water route.
In addition, in the prior art, the rate of recovery and water treatment amount with raising water are purpose, use multi-stag diffusion barrier device, this multi-stag diffusion barrier device is with two-stage or one of each grade configuration more than the two-stage or disposes two or more diffusion barrier device groups that the separating film module of said spiral type thin-film component is installed side by side and couple together.For example, in multi-stag diffusion barrier device 90 shown in Figure 9, utilize the former water of pump 91 supplies, supply main pipe arrangement 92, the former water supply pipe arrangement 93a of branch and 93b by former water, separating film module 94a and 94b by the first order of configuration arranged side by side handle, utilize permeate water to flow out pipe arrangement 96a and 96b acquisition permeate water, utilize condensed water to flow out pipe arrangement 95a and 95b acquisition condensed water.The described condensed water that flows out from separating film module 94a and 94b is compiled by catchment pipe arrangement 97a and 97b of condensed water, supplies main pipe arrangement (the former water of back level is supplied main pipe arrangement) 98 to partial separating film module 99 water flowings from middle condensed water.Obtain permeate water thereby flow out pipe arrangement 101, flow out pipe arrangement 100 from condensed water and obtain condensed water from permeate water.Like this,, can improve the rate of recovery of water, in addition, dispose a plurality of separating film modules side by side, can increase the treating capacity of water by each level by handling as the supply water of the separating film module of back level in the middle condensed water that prime obtains.
Utilizing this reverse osmosis membrane screw type thin-film component to obtain under the situation of water in the desalination of seawater and ultra-pure water, the various manufacture process, usually, be that purpose is carried out pre-treatment with the turbid material of removing former water.Why carry out this pre-treatment and be because, for when guaranteeing former current road, increase the contact area of former water and reverse osmosis membrane as much as possible, need make the very thin thickness of the former water separator of reverse osmosis membrane screw type thin-film component, usually at 1mm or below the 1mm, turbid material can be accumulated on the former water separator that is arranged in former current road, cause the obstruction on former current road easily, therefore, need in advance the turbid material in the former water to be removed, avoid because the rising of accumulating the water flowing pressure differential that causes of turbid material, reach the water quality that sees through the water yield and permeate water and reduce, so that can turn round long-term and stably.This is the pretreating device that purpose is used to remove turbid material, for example comprise various devices such as coagulative precipitation processing, filtration treatment and film processing, these devices, make cost and operating cost be set rise in, also existing needs the big problem that area is set.
But, if can omit pretreating device with respect to the separating film module that the screw type thin-film component is installed, then water for industrial use and water channel water can be supplied to reverse osmosis membrane assembly without pre-treatment, can simplify system, reduce area is set, reduce cost, high in industrial value.Thereby if can develop the former water separator with structure that turbid material is difficult to accumulate, even perhaps turbid material is accumulated on the former water separator, turbid material is removed in change that also can be by method of operation and flushing etc., then becomes utmost point useful technology.Particularly, utilizing the change of method of operation and wait the method for removing turbid material by flushing, is very favourable might intactly using on the screw type thin-film component this point of prior art.
Open in the flat 11-104636 communique the spy, disclose a kind of with respect to flowing of common former water with reverse mobile supplied with pressurized gas-liquid two layers flow, the method for back flush reverse osmosis membrane assembly.But this back flush is just removed attached to the turbid material on this tubular wire face of hollow line style reverse osmosis membrane assembly, can not remove attached to the turbid material on the former water separator of screw type reverse osmosis membrane assembly.
Thereby, the object of the present invention is to provide a kind of separating film module that is accumulated in the turbid material on the former water separator that is wound up on the screw type thin-film component and method of operation of separating film module of removing expeditiously.
Summary of the invention
In light of this situation, what the inventor furtherd investigate found that, on the outer peripheral face that the diffusion barrier and the former water separator that are equipped with the bag shape are wound up into the permeate water collector pipe together and in the separating film module of the screw type thin-film component that constitutes, on the intersection point part of accumulating the wire rod intersection that is positioned at former water separator of the turbid material in the former water, when separating film module turns round, by when regularly or aperiodically the flow direction of former water being changed round about, turning round, thereby can be easy to remove the turbid material that is accumulated on the former water separator, when the flow direction change of former water, by repeatedly washing, can further increase the effect of removing of turbid material, in the method for operation of separating film module, when suitably washing, the flushing of carrying out at first in the flushing of carrying out at every turn, carry out along the direction opposite, thereby can further increase the effect of removing of turbid material, thereby finish the present invention with the flow direction of the former water that flows till before this.
Promptly, the invention provides a kind of method of operation of separating film module, be be equipped with on the outer peripheral face that diffusion barrier and former water separator with the bag shape be wound up into the permeate water collector pipe together and the method for operation of the separating film module of the screw type thin-film component that constitutes (below, also be referred to as the method for operation (I) of separating film module), perhaps, be that 1 or the side by side separating film module of the prime of the screw type thin-film component more than 2 or 2 of configuration or the middle condensed water of separating film module group will be installed, be supplied to successively the above multi-stag separating film module of the two-stage of the separating film module of back level of the screw type thin-film component more than 2 or 2 that 1 or side by side configuration are installed or separating film module group or two-stage method of operation (below, also be referred to as the method for operation (II) of separating film module, in addition, the method of operation (II) of the method for operation (I) of above-mentioned separating film module or above-mentioned separating film module is referred to as the method for operation (I) of separating film module or (II)), with the flow direction of the former water of this separating film module regularly or change round about aperiodically.By adopting this structure, the turbid material that is accumulated in the intersection point part of former water separator is easy to be stripped from, remove.
In addition, the invention provides a kind of method of operation (I) of separating film module or (II), when the flow direction change of aforementioned former water, alternately repeatedly wash from both direction.By adopting this structure, can remove the turbid material on the intersection point part that is accumulated in former water separator reliably.
In addition, the invention provides a kind of method of operation (I) of separating film module or (II),, carry out along the direction opposite with the flow direction of the former water that flows before this in the flushing of carrying out at first of each flushing.By adopting this structure, the turbid material on the intersection point part of utilizing initial flushing to peel off expeditiously to be accumulated in former water separator can be easy to be removed.
In addition, the invention provides a kind of method of operation (I) of separating film module or (II), this separating film module is equipped with the diffusion barrier of bag shape and former water separator is wound up on the outer peripheral face of permeate water collector pipe and the screw type thin-film component that constitutes together, wherein, this method of operation comprises the flushing of one or many halfway, in the flushing of carrying out at first of this flushing, carry out along the direction opposite with the flow direction of the former water that flows before this.By adopting this structure, can play the effect same with aforementioned invention.
In addition, the invention provides a kind of method of operation (I) of separating film module or (II), when aforementioned flushing, the valve of permeate water side cuts out fully.When the valve of permeate water side is opened, use under the situation of separating film module, under the flushing pressure degree at high pressure, former water as flushing liquor can not see through, but can see through at low pressure or ultralow pressure, exist and reduce flushing flow rate, and the water of the water quality inferiority problem that can see through with Truman's assembly.In addition, have utilization produces back pressure, makes the polluter suspension that is deposited on the face after the valve of just closing the permeate water side effect, can further improve the effect of flushing.
In addition, the invention provides a kind of method of operation (I) of separating film module or (II), before carrying out aforementioned flushing, carry out the pressure of former water supply side and eliminate.Owing to by eliminating the pressure of former water supply side, be pressed to the pressure on the face till the elimination before this,, the turbid material that is accumulated on face and the former water separator suspended so film can float slightly.
In addition, the invention provides a kind of method of operation of multi-stag separating film module, in each separating film module at different levels or each separating film module group, carry out the flushing of aforementioned multi-stag separating film module respectively.By adopting this structure, can prevent to flow into the screw type thin-film component of back level from the turbid material that the screw type thin-film component of prime is peeled off, prevent to pollute.
In addition, the invention provides a kind of diffusion barrier device, comprising: the former water that connects the former water transfer pump and first valve is supplied first pipe arrangement; The former water that connects first valve and separating film module is supplied second pipe arrangement; This separating film module; The permeate water that is connected in the permeate water side of this separating film module flows out pipe arrangement; Have and connect former water and supply the flow direction conversion pipe arrangement that the condensed water of the condensed water outflow side of first pipe arrangement and this separating film module flows out the first branch's pipe arrangement and second valve; Supply the second pipe arrangement branch and make the flow direction of former water the condensed water that the condensed water when being reverse flows out from former water and flow out second branch's pipe arrangement.By adopting this structure, the enough simple devices of energy are implemented the method for operation (I) of aforementioned separating film module reliably.
In addition, the invention provides a kind of multi-stag diffusion barrier device, be middle the condensed water that will obtain, be supplied to the two-stage of separating film module of the diffusion barrier device of back grade or diffusion barrier device group or the multi-stag diffusion barrier device more than the two-stage successively from the separating film module of the diffusion barrier device of prime or diffusion barrier device group, wherein, the diffusion barrier device of this diffusion barrier device or formation diffusion barrier device group comprises: the former water that is connected in first valve is supplied first pipe arrangement; The former water that connects first valve and separating film module is supplied second pipe arrangement; This separating film module; The permeate water that is connected in the permeate water side of this separating film module flows out pipe arrangement; Be connected in the flow direction conversion pipe arrangement that this former water is supplied the condensed water outflow side of first pipe arrangement and this separating film module and had second valve; The condensed water that is connected with this flow direction conversion pipe arrangement and has the 3rd valve flows out first pipe arrangement; The condensed water of supplying the second pipe arrangement branch and having the 4th valve from this former water flows out second pipe arrangement.By adopting this structure, can utilize simple device, implement the method for operation (II) of aforementioned separating film module reliably.
Description of drawings
Fig. 1 is the view of flow process of device of the method for operation of the expression separating film module of implementing the invention process form, Fig. 2 is the view of flow process of device of the method for operation of the expression separating film module of implementing another form of implementation of the present invention, Fig. 3 is the view of flow process of device of the method for operation of the expression separating film module of implementing another form of implementation of the present invention, Fig. 4 is the view of an example of the structure of the separating film module in expression this form of implementation example, Fig. 5 is the view of flow process of the multi-stag diffusion barrier device of expression this form of implementation example, Fig. 6 A～Fig. 6 C is the view of another flow process of the multi-stag diffusion barrier device of expression this form of implementation example, Fig. 7 is the view of the flow process of the expression multi-stag diffusion barrier device of implementing embodiment 7～11 usefulness, Fig. 8 is the sketch of the reverse osmosis membrane assembly of prior art, and Fig. 9 is the view of flow process of an example of the multi-stag diffusion barrier device of expression prior art.
The specific embodiment
Below, the method for operation of the separating film module of first kind of form of implementation of the present invention is described with reference to Fig. 1.Fig. 1 is a flow chart of implementing the reverse osmosis membrane apparatus of this routine method of operation.In Fig. 1, reverse osmosis membrane apparatus 10 comprises: the former water that connects the former water transfer pump 11 and the first valve a is supplied first pipe arrangement 12; The former water that connects the first valve a and reverse osmosis membrane assembly 10A is supplied second pipe arrangement 13; Reverse osmosis membrane assembly 10A; Permeate water with valve e of the permeate water side that is connected to reverse osmosis membrane assembly 10A flows out pipe arrangement 14; Connect former water supply first pipe arrangement 12 and reverse osmosis membrane assembly 10A the condensed water outflow side, have flow direction conversion that condensed water flows out the first branch's pipe arrangement 151 and the second valve b with pipe arrangement 15; From former water supply second pipe arrangement, 13 top sets, condensed water with valve d that the condensed water of the flow direction that makes former water when being rightabout flow out flows out second branch's pipe arrangement 121.In addition, set up valve c midway what condensed water flowed out first branch's pipe arrangement 151.
In reverse osmosis membrane apparatus 10, at first, the second valve b, valve d close, and adjust valve c, make to be the pressure of regulation in the assembly, and the first valve a and valve e open.Utilize former water transfer pump 11 that former water is supplied to reverse osmosis membrane assembly 10A.Handle former water by reverse osmosis membrane assembly 10A, flow out first branch's pipe arrangement 151 from condensed water and obtain condensed water, flow out pipe arrangement 14 from permeate water simultaneously and obtain permeate water.In this case, with the turbidity of former water relation is arranged also, along with the process of the duration of runs, the suspended materials such as turbid material in the former water are accumulated on the former water separator that is wound on the element gradually.
When the turbid material in the former water was accumulated on the former water separator, the water flowing pressure differential rose.In this case, the flow direction with former water changes over rightabout.That is, the first valve a and valve c close, and adjust valve d, make the pressure for stipulating in the assembly, open the second valve b.Thus, former water flows into from the condensed water outflow side of reverse osmosis membrane assembly 10A, is handled by reverse osmosis membrane assembly 10A, flows out second branch's pipe arrangement 121 from condensed water and obtains condensed water, flows out pipe arrangement 14 from permeate water simultaneously and obtains permeate water.By like this flow direction of former water being changed over rightabout, the turbid material that will be accumulated in easily on the intersection point part of former water separator is peeled off, is removed.Simultaneously, owing to the process along with the duration of runs, the suspended materials such as turbid material in the former water are accumulated on the former water separator that is installed on the element once more, so further the flow direction of former water is changed into rightabout.After, repeat this operation.Can be regular or irregular the change period of the flow direction of former water, as the interval of the flow direction that changes former water, is 1 hour～24 hours, is preferably 1 hour～12 hours.When less than in the time of 1 hour, the switching times of transfer valve is a lot, reduces the life-span of transfer valve, and in addition, when surpassing 24 hours, the turbid material of accumulating becomes and is difficult to remove.In addition, the change time of the flow direction of former water, as mentioned above, also can change in the moment of the water flowing pressure differential that becomes regulation, in this case, can not operate continually, be preferred removing on the turbid material this point of accumulating.In addition, also can will combine through method that changes flow direction after the official hour and the method that changes in the moment of the water flowing pressure differential that becomes regulation.
According to this routine reverse osmosis membrane apparatus 10, owing to the mobile changeabout direction with former water suppresses accumulating of turbid material, so, can omit in the prior art to remove the setting that turbid material in the former water is the pretreating devices such as coagulative precipitation processing, filtration treatment and film processing that use of purpose.Therefore, can realize the simplification system, reduce and area is set, play epoch-making effect aspect reducing cost.
Secondly, the method for operation of the separating film module of second kind of form of implementation of the present invention is described with reference to Fig. 1.Second kind of form of implementation example, be in the method for operation of the reverse osmosis membrane assembly of first kind of form of implementation, when the flow direction of the aforementioned former water of change, alternately repeatedly wash from both direction, thus, can remove turbid material on the intersection point part that is accumulated in former water separator reliably.Alternately carry out process of washing as both direction from reverse osmosis membrane assembly, can list the method that initial flushing carries out along the direction opposite with the flow direction of the former water that flows before this (below also be referred to as back flush), and the method for carrying out along the direction identical with the flow direction of the former water that flows before this, wherein, back flush, can peel off effectively in initial flushing say so on the turbid material this point on the intersection point part that is accumulated in former water separator preferred.When initial flushing is during along the direction identical with the direction that flows before this, although can remove the turbid material of a part, but more be to become the turbid material that pushes on the delay part that is accumulated in former water separator, turbid material can be accumulated along with the process of time.In order to carry out back flush, at first, close the first valve a and valve c, open the second valve b and valve d.Then, to be fed to hastily in the reverse osmosis membrane assembly through the former water of about 3 times flow of the former water supply flow handling from the condensed water outflow side, supply second pipe arrangement 13, condensed water by the former water of Yuan Shui inflow side and flow out second branch's pipe arrangement 121 and discharge and get final product.After back flush finished, next time, the flushing side along with back flush the time was washed in the opposite direction.That is, close the second valve b and valve d, open the first valve a and valve c.Then, will be fed to hastily with the former water of the same flow of back flush in the reverse osmosis membrane assembly, and flow out first branched pipe 151 by the condensed water of condensed water outflow side and discharge from the Yuan Shui inflow side.Then, along with current when flushing flushing side wash in the opposite direction, after, carry out same operation repeatedly, alternately repeatedly wash from both direction.
In initial flushing during along the direction identical with the flow direction of the former water that flows before this, second operation when carrying out aforementioned back flush earlier.Like this,, the turbid material that is accumulated on the former water separator is peeled off, positively be discharged to outside the element by alternately repeatedly washing from both direction.When carrying out this flushing, in Fig. 1, utilize the valve c or the valve d of the pressure adjustment usefulness of condensed water outflow side, carry out pressure and discharge, but, be not limited thereto as the method that pressure discharges, the valve that pressure discharges usefulness also can be set in addition.In this case, in order to obtain more displacement, preferred condensed water flows out the diameter of the diameter of pipe arrangement greater than the pipe arrangement of the valve with pressure adjustment usefulness.In addition, also can flow out first branch's pipe arrangement 151 and condensed water and flow out on second branch's pipe arrangement 121 air chamber is set,, utilize the water that accumulates to wash by running in condensed water.Here said air chamber, be meant utilization by the exert pressure of condensed water air, the device that the water that accumulates in the chamber is flowed out.
When the flow direction change of aforementioned former water, under the situation of alternately repeatedly washing from both direction, by before washing, eliminating the pressure of former water supply side, the pressure of pushing face till eliminating before this, film becomes and floats slightly, so, the angle of coming from the turbid material that is accumulated on face and the former water separator is floated, the pressure of eliminating former water supply side is preferred.Method as the pressure of eliminating former water supply side, can list such method: supply at the former water of the outlet side of former water transfer pump 11 ventilation pipe arrangement (not shown) is set on first pipe arrangement 12, setting is attached to the valve (not shown) in the way of ventilation pipe arrangement, opens this valve; Perhaps in the running of opening the first valve a, valve c, valve e, open and be attached to condensed water and flow out valve d on second branch's pipe arrangement 121.Breakaway speed as valve has no particular limits, but moment ground, preferably within 1 second valve is all opened.Moment ground elimination pressure can make film float easily, and utilizes the effect of the effect acquisition discharge turbid material of water attack.In addition, in this case, preferably open the valve e of permeate water side.This be because, valve e is when closing, intermembranous pressure differential disappears, the power disappearance of pushing film is not so even eliminate the pressure of former water supply side, film can float yet.
In addition, preferably when flushing, the valve e that is attached on the permeate water effuser 14 is closed fully.When the valve e on being attached to permeate water effuser 14 opens, use under the situation of reverse osmosis membrane assembly at high pressure, degree with flushing pressure, former water as flushing liquor can not see through, but, but can see through under at low pressure or ultralow pressure, exist flushing flow rate and reduce with the situation of reverse osmosis membrane assembly, and the water of the water quality inferiority problem that can see through.In addition, also have the back pressure that utilization produces after just closing the valve that is attached on the permeate water effuser, make the effect of the polluter suspension that is deposited on the face, can further improve the effect of flushing.
Preferred aforementioned flushing is alternately carried out flushing more than twice or twice, below five times or five times from both direction.Washing time is for once the time, only becomes flushing in one direction, the cleaning performance deficiency, and turbid material can be accumulated along with the process of time.On the other hand, when surpassing five times, the water of discharge increases, and can reduce the rate of recovery.In addition, the time of each flushing has no particular limits, but is preferably for 30～120 seconds.Less than is the cleaning performance deficiency in the time of 30 seconds, flow process time lengthening when surpassing 120 seconds, and the rate of recovery reduces significantly.In addition, when flushing, also compressed air can be fed in the former water.By compressed air is blended in the former water, further improve cleaning efficiency.Compressed-air actuated supply is not particularly limited, but the volume ratio of preferred former water and air is 2: 1～1: 2.
After carrying out the flushing of stipulated time, carry out the processing of former water once more.In this case, the flow direction of former water is the opposite direction with the flow direction of the former water that flows before the initial flushing.That is, the first valve a and valve c close, and adjust valve d, make the pressure that becomes regulation in the assembly, and the second valve b and valve e open, and former water is handled by reverse osmosis membrane assembly 10A.Repeat former water treatment → flushing → former water treatment → flushing like this, successively.As former time for water treatment, be 1 little～24 hour, be preferably 1 hour～12 hours.When former treatment time of water less than in the time of 1 hour, the switching times of transfer valve is too much, and the life-span of transfer valve is reduced, and the rate of recovery reduces simultaneously.In addition, when surpassing 24 hours, can reduce the effect of removing of the turbid material accumulated.As the form that switches to flushing from former water treatment, can list: at every turn through changing the method for flow direction after the identical time, in the method for moment of the water flowing pressure differential that reaches regulation change flow direction, and both are combined the method that changes.
The method of operation of the separating film module of the third form of implementation of the present invention then, is described with reference to Fig. 1.The method of operation of the separating film module that this is routine, it is the method for operation that the separating film module of screw type thin-film component has been installed, this method of operation is such method: be included in midway and wash, in the flushing of carrying out at first of this flushing, be to carry out along the direction opposite with the flow direction of the former water that flows before this.That is, the third form of implementation is, after flushing, the flow direction of former water can be the identical direction of flow direction with before this former water, also can be direction in contrast, and is except that this point, identical with second kind of form of implementation example.Thereby, the operation format of the valve class the when preferred form of the former water during former water treatment, flushing, the preferred form of purging method etc. are all identical with second kind of form of implementation example.In the third form of implementation example, owing to flow in opposite direction and fully remove turbid material by when flushing, so obtain and second kind of routine identical effect of form of implementation.
The method of operation of the separating film module in the 4th kind of form of implementation of the present invention then, is described with reference to Fig. 2.In Fig. 2, the structure member identical with Fig. 1 paid identical label, omits its explanation, and its difference mainly is described.Promptly, in Fig. 2, be with the difference of Fig. 1, back level reverse osmosis membrane assembly 10B is set in reverse osmosis membrane assembly 10A downstream, prime reverse osmosis membrane assembly 10A and back level reverse osmosis membrane assembly 10B, connect by the permeate water of prime reverse osmosis membrane assembly 10A is flowed out pipe arrangement 14 as the elementary permeate water of the processed water supply of the device of back level, be equipped with the permeate water of discharging permeate water to flow out pipe arrangement 16 on the level reverse osmosis membrane assembly 10B of back and condensed water turned back to former water transfer pump before return pipe arrangement 18.In addition, on the level reverse osmosis membrane assembly 10B of back, be equipped with condensed water to flow out pipe arrangement 17.Prime reverse osmosis membrane assembly 10A uses reverse osmosis membrane apparatus of the present invention, and back level reverse osmosis membrane assembly 10B uses reverse osmosis membrane apparatus of the prior art.That is, in reverse osmosis membrane apparatus 10a, utilize former water transfer pump 11 that former water is supplied to prime reverse osmosis membrane assembly 10A.10A handles former water by the prime reverse osmosis membrane assembly, flows out pipe arrangement 15 from condensed water and obtains elementary condensed water, flows out pipe arrangement 14 from elementary permeate water simultaneously and obtains elementary permeate water.Then, this elementary permeate water is handled by back level reverse osmosis membrane assembly 10B, obtains secondary permeate water from permeate water pipe arrangement 16, and secondary condensed water is from returning the front that pipe arrangement 18 turns back to former water transfer pump simultaneously.This secondary condensed water is the water that the permeate water of will be carried out desalination by prime reverse osmosis membrane assembly 10A was concentrated by back level reverse osmosis membrane assembly 10B, and is low with former water specific conductivity.Therefore, whole secondary condensed water circulations can be made, the rate of recovery of water can be improved.Like this, in reverse osmosis membrane apparatus 10a, that adopt method of operation of the present invention is prime reverse osmosis membrane assembly 10A.In addition, reverse osmosis membrane apparatus 10a, since replace using in the device of prior art type only to remove the pretreating device of turbid material as purpose, the reverse osmosis membrane assembly that can implement method of operation of the present invention is used in prime, uses the two steps ro film in fact so become.Because pretreating device does not have the desalination function certainly in the device of prior art type, so reverse osmosis membrane apparatus 10a compares with the reverse osmosis membrane apparatus of prior art type, the water quality of permeate water is especially excellent.
Secondly, the method for operation of the separating film module of the 5th kind of form of implementation of the present invention is described with reference to Fig. 3.Fig. 3 is a flow chart of implementing the multi-stag diffusion barrier device of this routine method of operation.Multi-stag diffusion barrier device 28 is multi-stag diffusion barrier devices of two-stage of the separating film module 48 of a kind of middle condensed water that will obtain from each separating film module 30a, the 30b of the diffusion barrier device group 29a of prime diffusion barrier device group 29b of being supplied to back grade.That is, the diffusion barrier device 31b that has the diffusion barrier device 31a of separating film module 30a and have a separating film module 30b is disposed side by side, constitute the diffusion barrier device group 29a of prime, diffusion barrier device group 29b is configured in level thereafter, constitute the diffusion barrier device of two-stage.
In Fig. 3, diffusion barrier device 31a comprises: the former water that is connected on the valve a1 is supplied the first pipe arrangement 32a; The former water that connects valve a1 and separating film module 30a is supplied the second pipe arrangement 33a; Separating film module 30a; Be connected to the permeate water side of separating film module 30a, the permeate water with valve e1 flows out pipe arrangement 34a; Connect the flow direction conversion pipe arrangement 35a that former water is supplied the condensed water outflow side of the first pipe arrangement 32a and separating film module 30a, had valve b1; The condensed water that is connected, sets up valve c1 with flow direction conversion pipe arrangement 35a flows out the first pipe arrangement 36a; Supply the second pipe arrangement 33a top set, make the flow direction of former water that condensed water condensed water that flow out, that have valve d1 flows out the second pipe arrangement 37a when being reverse from former water.In addition, diffusion barrier device 31b, 31c adopt and the identical structure of diffusion barrier device 31a.And diffusion barrier device group 29a comprises: set up former water that former water flows out the first pipe arrangement valve f in the way and flow out the former water that first pipe arrangement 39 connects and supply main pipe arrangement 38; From former water supply main pipe arrangement 38 top sets, the former water that is connected to diffusion barrier device 31a, 31b supplies former water supply the pipe arrangement 40a of branch, 40b on the first pipe arrangement 32a, the 32b; Diffusion barrier device 31a and 31b.In addition, the diffusion barrier device group 29b of back level comprises: set up first condensed water that former water that former water flows out the second pipe arrangement valve (the former water of back level flows out the pipe arrangement valve) m flows out the back level that second pipe arrangement (former water outflow pipe arrangement) 47 connects in the way and supply main pipe arrangement (former water is supplied main pipe arrangement) 41; Diffusion barrier device 31c.And multi-stag diffusion barrier device 28 further comprises: at the pump 50 of the prime of diffusion barrier device group 29a, the 29b of prime; Supply main pipe arrangement (former water is supplied main pipe arrangement) 41 branches, flow out the first pipe arrangement 36a, 36b, condensed water with the condensed water of diffusion barrier device group 29a and flow out condensed water that the second pipe arrangement 37a, 37b the be connected pipe arrangement 51 that catchments from first condensed water of diffusion barrier device group 29b.
In multi-stag diffusion barrier device 28, at first, valve b1, b2, d1, d2, f, h, j and m are closed, valve c1, c2 and i are adjusted opening, make the pressure that becomes regulation in the assembly, valve a1, a2, e1, e2, g and k are opened.Former water is supplied to separating film module 30a and 30b by former water transfer pump 50.Former water is handled by separating film module 30a and 30b, is flowing out from first condensed water when the first pipe arrangement 36a and 36b obtain first condensed water, flows out pipe arrangement 34a and 34b obtains permeate water from permeate water.Described first condensed water that is obtained by separating film module 30a and 30b (middle condensed water, below identical) is compiled by the condensed water pipe arrangement 51 that catchments, and is supplied to the separating film module 48 of back level.And flowing out first pipe arrangement, 45 acquisitions, second condensed water from condensed water when, flow out pipe arrangement 43 from permeate water and obtain permeate water.In this case, because the turbidity of former water, along with the process of the duration of runs, the suspended materials such as turbid material in the former water can be accumulated on the former water separator that is wound up on the element gradually.
When the turbid material in the former water was accumulated on the former water separator, the water flowing pressure differential rose.In this case, the flow direction with former water changes to rightabout.That is, valve a1, a2, c1, c2, g and i are closed, valve d1, d2 and j are adjusted opening, make the pressure that becomes regulation in the assembly, valve b1, b2 and h are opened.Thus, former water flows into from the condensed water outflow side of separating film module 30a and 30b, and separated membrane module 30a and 30b handle, and flows out the second pipe arrangement 37a and 37b obtains first condensed water from condensed water, simultaneously, flows out pipe arrangement 34a and 34b obtains permeate water from permeate water.From described first condensed water that each separating film module obtains, be concentrated the water pipe arrangement 51 that catchments and compile, flow into from the condensed water outflow side of the separating film module 48 of back level and handle.Thereby flowing out second pipe arrangement, 46 acquisitions, second condensed water from condensed water when, flow out pipe arrangement 43 from permeate water and obtain permeate water.Be altered to rightabout by the flow direction with this former water, the turbid material that will be accumulated at an easy rate on the intersection point part of former water separator is peeled off, is removed.And along with the process of the duration of runs, the suspended materials such as turbid material in the former water can be accumulated on the former water separator that is installed on the element once more, so further the flow direction with former water is altered to rightabout.After, repeat this operation.The change time of the mobile direction of former water can be regular or irregular, as the interval of the flow direction that changes former water, is 1 hour～24 hours, is preferably 1 hour～12 hours.When less than in the time of 1 hour, the switching times of transfer valve is a lot, reduces the life-span of transfer valve, and in addition, when surpassing 24 hours, the turbid material of accumulating becomes and is difficult to remove.In addition, the change time of the flow direction of former water is outside above-mentioned, also can change in the moment of the water flowing pressure differential that becomes regulation, in this case, can not carry out alter operation continually, be preferred from the angle that can remove the turbid material of accumulating.In addition, also can will combine through method that changes flow direction after the official hour and the method that changes in the moment of the water flowing pressure differential that becomes regulation.
According to this routine multi-stag diffusion barrier device 28, because mobile changeabout direction with former water, suppress accumulating of turbid material, so, can omit in the prior art to remove the setting that turbid material in the former water is the pretreating devices such as coagulative precipitation processing, filtration treatment or film processing that use of purpose.Therefore, can realize the simplification system, reduce and area is set, play epoch-making effect aspect reducing cost.
Secondly, the method for operation of the separating film module of the 6th kind of form of implementation of the present invention is described with reference to Fig. 3.The 6th kind of form of implementation example, be in the method for operation of the separating film module of the 5th kind of form of implementation, when the flow direction change of aforementioned former water, alternately repeatedly wash from two directions, whereby, can remove turbid material on the intersection point part that is accumulated in former water separator reliably.Alternately carry out process of washing as both direction from separating film module, can list initial flushing along with before this till the opposite direction of the flow direction of the former water that the flows method of carrying out (below, also be referred to as back flush) and along with before this till the identical direction of the flow direction of the former water that the flows method of carrying out, wherein, back flush, can be effectively in initial flushing the turbid material that is accumulated on the crosspoint part of former water separator being peeled off, is preferred.When initial flushing along with before this till during the identical direction of the direction that flows, although can remove a part of turbid material, but be the turbid material that pushes on the delay part that is accumulated in former water separator more, turbid material can be accumulated along with the process of time.In order to carry out back flush, at first, shut off valve a1, a2, c1, c2, f, g, i and m open valve b1, b2, d1, d2, h and j.Then, the former water of about 3 times flow of the former water supply from the condensed water outflow side will be equivalent to see through to handle is fed in reverse osmosis membrane assembly 30a and the 30b hastily, by the former water of Yuan Shui inflow side supply the second pipe arrangement 33a and 33b, condensed water flows out the second pipe arrangement 37a and 37b discharges.The former water of discharging from separating film module 30a and 30b further is fed to from the condensed water outflow side in the separating film module 48 of back level by the condensed water pipe arrangement 51 that catchments, and flows into the former water of surveying from former water and supplies second pipe arrangement 42, condensed water and flow out second pipe arrangement 46 and discharge.After back flush finished, next time, the flushing side along with back flush the time was washed in the opposite direction.That is, shut off valve b1, b2, d1, d2, f, h, j and m open valve a1, a2, c1, c2, g and i.Then, the former water of flow that will be identical with back flush is fed in separating film module 30a and the 30b hastily from the Yuan Shui inflow side, and the condensed water that flows out from condensed water flows out the first pipe arrangement 36a and 36b discharge.And then the former water of discharging from separating film module 30a and 30b is fed in the separating film module 48 from the Yuan Shui inflow side by the condensed water pipe arrangement 51 that catchments, and flows out first pipe arrangement 45 by the condensed water of condensed water outflow side and discharges.Secondly, the flushing side along with this flushing the time is washed in the opposite direction, after, carry out same operation repeatedly, alternately repeatedly wash from both direction.
In aforementioned flushing, the preferred method of operation of in each of separating film module group at different levels, washing respectively.For example, in aforementioned reciprocal flushing, buttoned-up valve m is opened, valve h and the j that is opening closed, at first carry out the separating film module 30a of prime and the flushing of 30b, former water is flowed out second pipe arrangement 47 from former water flow out, through after the regular hour, shut off valve d1, d2 and m, open valve c1, c2, h and j carry out the back flush of the separating film module 48 of back level.According to this method, from the turbid material that the former water separator of the separating film module 30a of prime and 30b is peeled off, do not flow into the separating film module 48 of back level, can not pollute the separating film module 48 of back level, so can promptly wash.In addition, further under the situation of washing in the opposite direction with the side of described back flush, preferably in each of separating film module group at different levels, wash respectively, for example, open valve a1, a2 and m, shut off valve b1, b2, h and j, at first carry out the separating film module 30a of prime and the flushing of 30b, making former water flow out second pipe arrangement 47 from former water flows out, through after the regular hour, shut off valve c1, c2 and m open valve d1, d2, g and i, carry out the flushing of the separating film module 48 of back level.Same under the situation of the multi-stag diffusion barrier device that constitutes by the separating film module group more than three grades or three grades, preferably each of separating film module group at different levels is washed respectively.
In initial flushing under the situation of the direction identical with the flow direction of the former water that flows before this, second operation when carrying out aforesaid back flush earlier.Like this,, the turbid material that is accumulated on the former water separator is peeled off, be discharged to outside the element reliably by from alternately repeatedly flushing of both direction.When carrying out this flushing, in Fig. 3, utilize valve c1, c2, d1, d2, i and the j of the pressure adjustment usefulness of condensed water outflow side, carry out the release of pressure, the method as pressure discharges is not limited thereto, and the valve that pressure discharges usefulness also can be set in addition.In this case, in order to obtain more displacement, preferred condensed water flows out the diameter of pipe arrangement greater than having the diameter of pressure adjustment with the pipe arrangement of valve.In addition, also can flow out the first pipe arrangement 36a, 36b, 45 and condensed water flows out the second pipe arrangement 37a, 37b, 46 a position arbitrarily or a plurality of position are provided with the air chamber (not shown),, utilize the water that accumulates to wash by running in condensed water.Here said air chamber is meant that utilization is by the pressure of condensed water and air pressurized, device that the water that accumulates in the chamber is flowed out.
When the flow direction change of aforementioned former water, under the situation of alternately repeatedly washing from both direction, because before washing, by eliminating the pressure of former water supply side, the pressure that is pressed to till before this on the face is eliminated, and film is lax slightly, so, from making the fixed lax viewpoint that is accumulated in the turbid material on face and the former water separator, the pressure of eliminating former water supply side is preferred.Method as the pressure of eliminating former water supply side can list: will be attached to and supply the former water that former water that main pipe arrangement 38 is connected flows out on first pipe arrangement 39 with the former water of the outlet side of former water transfer pump 50 and flow out the method that the first pipe arrangement valve f opens; Perhaps in the running of opening the first valve a1, a2, c1, c2, e1, e2, g, i and k, open the method for valve d1, d2 and m.Opening speed as valve has no particular limits, and still, moment ground, preferably within 1 second valve is all opened.Moment ground elimination pressure can easily make film lax, and utilizes the effect of the effect acquisition discharge turbid material of water attack.In addition, in this case, preferably open valve e1, e2 and the k of permeate water side.This be since shut off valve e1,, when e2 and k, intermembranous pressure differential disappears, the power of pushing film disappears, so even for example eliminate the pressure of former water supply side, film can not relax yet.
In addition, in when flushing, preferably will be attached to valve e1 on permeate water effuser 34a, the 34b and 43,, e2 and k close fully.When opening the valve e1, the e2 that are attached on permeate water effuser 34a, the 34b and 43 and k, use under the situation of separating film module at high pressure, under the flushing pressure degree, former water as flushing liquor can not see through, but can see through at low pressure or ultralow pressure, exist the problem that the water that reduces flushing dose and water quality inferiority can see through with reverse osmosis membrane assembly.In addition, utilize the back pressure that after just closing the valve that is attached on the permeate water effuser, produces, have the fixed lax effect that makes the polluter that is deposited on the face, can further improve the effect of flushing.
Preferred aforementioned flushing is alternately carried out more than twice or twice, below five times or five times from both direction.Washing time is for once the time, only becomes flushing in one direction, the cleaning performance deficiency, and turbid material can be accumulated along with the process of time.On the other hand, when surpassing five times, the water of discharge increases, and can reduce the rate of recovery.In addition, the time of each flushing has no particular limits, and is preferably for 30～120 seconds.Less than is in the time of 30 seconds, the cleaning performance deficiency, and when surpassing 120 seconds, the flow process time lengthening, the rate of recovery reduces significantly.In addition, when flushing, also compressed air can be fed in the former water.By making compressed air sneak into Yuan Shui, further improve cleaning efficiency.Compressed-air actuated supply has no particular limits, but the volume ratio of preferred former water and air is 2: 1～1: 2.
After the flushing of carrying out official hour, carry out the processing of former water once more.In this case, the flow direction of former water is the opposite direction of flow direction with the former water that flowed before initial flushing.That is, shut off valve a1, a2, c1, c2, f, g, i and m adjust opening with valve d1, d2 and j, make the pressure for stipulating in the assembly, and valve b1, b2, e1, e2 and k are opened, and former water is handled by separating film module 30a, 30b.Repeat former water treatment → flushing → former water treatment → flushing like this, successively.As former time for water treatment, be 1 hour～24 hours, be preferably 1 hour～12 hours.When former treatment time of water less than in the time of 1 hour, the switching times of transfer valve is too much, and the life-span of transfer valve is reduced, and the rate of recovery reduces simultaneously.In addition, when surpassing 24 hours, can reduce the effect of removing of the turbid material accumulated.Form as switch to flushing from former water treatment can list: at every turn through changing the method for flow direction after the identical time; Method at the moment of the water flowing pressure differential that reaches regulation change flow direction; And both are combined the method that changes.
Below, the method for operation of the separating film module of the 7th kind of form of implementation of the present invention is described with reference to Fig. 3.The method of operation of the separating film module that this is routine, it is the method for operation that the multi-stag separating film module of screw type thin-film component is installed, this method of operation is such method: comprise flushing halfway, in the flushing of carrying out at first of this flushing, be to carry out along the direction opposite with the flow direction of the former water that flows before this.That is, the 7th kind of form of implementation, after flushing, the flow direction of former water can be the identical direction of flow direction with before this former water, also can be direction in contrast, and is except that this point, identical with the 6th kind of form of implementation example.Thereby, the preferred form of the former water during former water treatment, the operation format of the valve class when flushing, the preferred form of purging method etc. are all identical with the 6th kind of form of implementation example.In the 7th kind of form of implementation example, owing to when flushing,, can fully remove turbid material by flowing round about, so, can play and the 6th kind of identical effect of form of implementation example.
Former water as directly being supplied to this routine reverse osmosis membrane apparatus 10 or multi-stag diffusion barrier device 28 can list water for industrial use, water channel water and recycle-water etc.Turbidity as former water, have no particular limits, but for turbidity be 2 the degree about the screw type thin-film component for, even than higher turbidity, because regularly or aperiodically with the direction of the mobile changeabout of former water, so in long-time running, the water flowing pressure differential can not rise yet.In addition, after being heated to 40～60 ℃, supply former water, can prevent and remove the mucous membrane that on face, takes place, from but preferred.During 40 ℃ of the temperature deficiencies of former water, almost do not have the effect of removing of mucous membrane, when surpassing 60 ℃,, surpassed the heat resisting temperature of water treatment facilities although the effect of removing of mucous membrane is arranged.In addition, be heated to 40～60 ℃ former water, also can be without interruption, also can intermittently supply.As interrupted supply, never invalidly consumed energy, can remove the angle that is created in the mucous membrane on the face expeditiously and set out, preferred, with more than 1 hour or 1 hour, 1 week or 1 week carried out interrupted supply with interior interval.Supply less than at interval became and carries out unnecessary heating in the time of 1 hour, caused the waste of energy.On the other hand, when surpassing for 1 week, cause the generation of mucous membrane easily, effect reduces.In addition, with pH more than 2.0 or 2.0, the acid state of less than 7.0 supplies former water, has big bactericidal effect in acid water, in the generation that can suppress mucous membrane, can reduce turbid material on face accumulate, from but preferred.During pH less than 2.0, the problem of the resistance to chemical reagents of system can be produced,, the effect that mucous membrane takes place can not be obtained to suppress when 7.0 when above.In addition, contain in former water under the situation of thick particle such as sand grains, former water also comprises in advance by the processing water of coarse net purpose filter and the water that has added the dispersant that prevents that incrustation scale and dirt from using.By adding dispersant, can further suppress turbid material accumulating on former water separator and face.As dispersant, for example, can list commercial goods " hypersperse MSI300 ", " hypersperseMDC200 " (being ARGO SCIENTIFIC corporate system).
As the screw type thin-film component on the separating film module of being installed in that uses among the present invention, so long as the words on the outer peripheral face that the diffusion barrier and the former water separator of bag shape is wound up into the permeate water collector pipe together, have no particular limits, described former water separator, can use following separator: (i) constitute by first wire rod and second wire rod that extend by the shape that swans with mild curve from the inflow direction finding outflow side of former water, when the face of described first wire rod relative side in the diffusion barrier extends, form the former current road of a side between the first adjacent wire rod, when the face of described second wire rod relative opposite side in the diffusion barrier extends, form the former current road of opposite side between the second adjacent wire rod, described first wire rod and the described second wire rod part superposition, position in this coincidence combines, the former water that (ii) is fixedly installed on diffusion barrier flows into side end, perhaps former water flows on side end and the end, condensed water outflow side, (iii) aforementioned (ii) in, former water separator is flowed into side end to the former water of diffusion barrier, perhaps former water flows into the method that fixedly installs on side end and the end, condensed water outflow side, be that the former water separator of doubling is fixing from sandwich with respect to described end, (iv) constitute the average number of hits of the wire rod of former water separator, every 1m
2Separator is more than 500 or 500, less than 10,000, (v) constitute the number of hits density of the wire rod of former water separator, flow direction along former water reduces gradually, perhaps reduce intermittently, (vi) constitute the number of hits density of the wire rod of former water separator, increase gradually, perhaps increase intermittently along the flow direction of former water.In above-mentioned (i), the aforementioned shape that swans with mild curve, further be the shape with systematicness of no inflection point, the ratio (H/L) of amplitude H and wavelength L is 0.02～2, and every 1m of single line material has 1～100 wavelength, number of hits is in the suitable scope, simultaneously, when former water swans in former current road stably, flow from the inflow side to the outflow side with linearity basically, can further prevent turbid material accumulating in former current road, from but preferred.(ii) reach (iii) above-mentioned, the former water inflow side end of this diffusion barrier or end, condensed water outflow side are with respect to the length of the length direction of aforementioned permeate water collector pipe, preferably, be respectively from the Yuan Shui inflow side of this diffusion barrier or the condensed water outflow side to the inside, this diffusion barrier is with respect to 1～10% of the length of the length direction of permeate water collector pipe.
In the method for operation of separating film module of the present invention, be equipped with and be equipped with aforementioned (i), (ii), (iii) reach the separating film module of the screw type thin-film component of former water separator (iv), can be applied in aforementioned first kind of form of implementation example～the 7th kind form of implementation example any one.Be equipped with and be equipped with aforementioned (the v), (separating film module of the screw type thin-film component of former water separator vi), because the number of hits density of former water separator is defined on the flow direction of former water, so, can not be applicable to aforementioned first kind of form of implementation example, second kind of form of implementation example, the 5th kind of form of implementation example and the 6th kind of form of implementation example that the flow direction with former water changes round about.Be equipped with and be equipped with the aforementioned (separating film module of the screw type thin-film component of former water separator v), utilize the back flush of the third form of implementation example and the 7th kind of form of implementation example, it is necessary making turbid material be accumulated near the inlet of former water separator the structure this point in employing.In addition, be equipped with and be equipped with that aforementioned (separating film module of the screw type thin-film component of former water separator vi) can be applied to the third form of implementation example and the 7th kind of form of implementation example.
(ii) above-mentioned～(former water separator vi) for example, can list the separator of the mesh that is made of a plurality of first wire rods and a plurality of second wire rod.In this case, as the mesh shape, have no particular limits, but can list rhombus, quadrangle and waveform etc., as described wire rod cross-modality each other, have no particular limits, can list the engagement state that wire rod do not woven to each other, utilize the cross-modality that plain weave constitutes and utilize cross-modality that twill-weave forms etc.In addition, so-called intersection point is meant the point that first wire rod and second wire rod intersect, and for example, is intersection point under the corrugated situation as first wire rod and second wire rod, and first wire rod and second wire rod also can have a spot of intersection.In addition, the cross sectional shape as first wire rod and second wire rod has no particular limits, and can list circle, triangle, quadrangle etc.In addition, first wire rod and second wire rod use the wire rod of same size, identical cross sectional shape.The thickness of former water separator is equivalent to the diameter sum of the diameter and second wire rod of first wire rod, and is perhaps thin slightly than it, in the scope of 0.4～3.0mm.As the material of former water separator, have no particular limits in addition, but from angle, optimization polypropylene and the polyethylene of formability and cost.In addition, the manufacture method of former water separator has no particular limits, and can adopt known method.But from cost and precision aspect, extruding formation method is preferred.
Described screw type thin-film component with bag shape diffusion barrier and aforementioned former water separator together, is wound up on the outer peripheral face of permeate water collector pipe with a bag shape diffusion barrier or with a plurality of bags of shape diffusion barriers.As diffusion barrier, can list secondary filter film, ultra filtration filter membrane and reverse osmosis membrane etc.Wherein, reverse osmosis membrane is used for from former water isolating ions composition and low molecular composition, and pre-treatment in the prior art is on the necessary this point, can further bring into play its effect.As reverse osmosis membrane, can list the sodium chloride in the saline solution is had the common reverse osmosis membrane of the high rate of removing more than 90% and nano-filtration membrane and loose (Le one ズ) reverse osmosis membrane of low salt rejection rate.Although nano-filtration membrane and loose reverse osmosis membrane have desalination, and be lower than the desalination of common reverse osmosis membrane, so, the separating property of hardness components such as Ca, Mg had especially.In addition, nano-filtration membrane and loose reverse osmosis membrane are referred to as the NF film.
The reverse osmosis membrane assembly of Shi Yonging as long as be equipped with said spiral type thin-film component, has no particular limits in this example, for example, can list the reverse osmosis membrane assembly with structure shown in Figure 4.As shown in Figure 4, reverse osmosis membrane 61 and the former water separator with the bag shape is wound into helical form, usefulness external packing body 62 its tops of covering together on the outer peripheral face of permeate water collector pipe.And in order to prevent that being wound into spiral helicine reverse osmosis membrane 61 gives prominence to, the telescopic securing member 64 that will have a plurality of radial ribs 63 is installed in its two ends.With these permeate water collector pipes 60, reverse osmosis membrane 61, external packing body 62, telescopic securing member 64, form a screw type thin-film component 65, each permeate water collector pipe 60 usefulness connector (not shown)s are communicated with, a plurality of screw type thin-film components 65 are loaded in the shell 66.In addition, between the interior week of the periphery of screw type thin-film component 65 and shell 66, form gap 67, with salt watertight seal (Block ラ イ シ one Le) 68 with these gap 67 obturations.In addition, on an end of shell 66, set up the former water inflow pipe (not shown) that makes former water inflow enclosure use and set up processing water pipe (not shown) and the non-water pipe (not shown) that sees through that is communicated with permeate water collector pipe 60, constitute reverse osmosis membrane assembly 69 with shell 66, its inner parts and pipe arrangement (nozzle) etc. at the other end.
When handling former water with the reverse osmosis membrane assembly 69 of this structure, utilize pump that the end of former water from shell 66 is pressed into, shown in arrow line among Fig. 4, former water is by between each radial rib 63 of telescopic securing member 64, enter in the initial screw type thin-film component 65, the former water of a part passes the former current road of dividing out with the former water separator between the film of screw type thin-film component 65, arrive next screw type thin-film component 65, a part of in addition former water sees through reverse osmosis membrane 61, become permeate water, this permeate water is collected in the permeate water collector pipe 60.Like this, former water passes screw type thin-film component 65 respectively, do not see through the former water of reverse osmosis membrane, as the condensed water that comprises turbid material and ionic impurity with high concentration, take out from the other end of shell 66, in addition, see through the permeate water of reverse osmosis membrane, by permeate water collector pipe 60, be extracted the outside of shell 66 as permeate water.In addition, the reverse osmosis membrane assembly that uses among the present invention as shown in Figure 4, is equipped with a plurality of screw type thin-film components, but in addition, a screw type thin-film component for example can be installed also.
The multi-stag diffusion barrier device that this is routine, it is a kind of middle condensed water that will obtain from the separating film module of the diffusion barrier device of prime or diffusion barrier device group, the above diffusion barrier device of the two-stage of the separating film module of the diffusion barrier device of level or diffusion barrier device group or two-stage after being supplied to successively, for example, can list: by the diffusion barrier device group 72a of the prime of 4 separating film module 71a～71d of configuration arranged side by side, 2 separating film module 71e have been disposed side by side, the diffusion barrier device group 72b of the middle rank of 71f, and 4 → 2 → 1 type, the three grades of formula diffusion barriers device (Fig. 5) that disposes back grade the diffusion barrier device 72c formation of 1 separating film module 71g; By the diffusion barrier device group 73a that has disposed the prime of 3 separating film module 74a～74c arranged side by side, 2 separating film module 74d have been disposed side by side, 3 → 2 type two-stage type diffusion barrier devices (Fig. 6 A) that the diffusion barrier device group 73b of the back level of 74e constitutes have disposed 2 separating film module 76a by arranged side by side, the diffusion barrier device group 75a of the prime of 76b, 2 → 1 type two-stage type diffusion barrier devices (Fig. 6 B) that constitute with the diffusion barrier device 75b of the back level that has disposed 1 separating film module 76c and by the diffusion barrier device 77a of the prime that has disposed 1 separating film module 78a with disposed 1 → 1 type two-stage type diffusion barrier device (Fig. 6 C) that the diffusion barrier device 77b of the back level of 1 separating film module 78b constitutes.In addition, Fig. 6 B is the collocation form identical with Fig. 3.In addition, Fig. 5 and Fig. 6 are schematic diagrames, and from two outflow pipelines of separating film module, the expression condensed water flows out first pipe arrangement and condensed water second pipe arrangement, but actual allocation position difference.These multi-stag diffusion barrier devices according to the rate of recovery of desired water and the treating capacity of water, can adopt suitable form.According to multi-stag diffusion barrier device of the present invention, can utilize simple device to implement method of operation reliably according to multi-stag separating film module of the present invention.
(embodiment)
Then, enumerate embodiment, more specifically the present invention will be described, but this is an example, is not limitation of the invention.
Handling turbidity with the reverse osmosis membrane apparatus of flow process shown in Figure 1 is that 2 degree, conductance are the water for industrial use of 20mS/m, under following operating condition, carries out 2000 hours endurance running.Reverse osmosis membrane apparatus utilizes 1 reverse osmosis membrane assembly that 8 inches element ES-10 (day Dong Diangongshe system) of the former water separator of a coiling mesh are installed.To the evaluation of the performance of reverse osmosis membrane assembly, the water flowing pressure differential (MPa) when being determined at start of run and 2000 hours, the conductance (mS/m) that sees through the water yield (1/ minute) and permeate water are carried out.In addition, after 2000 hours, reverse osmosis membrane assembly is disintegrated, observe the adhesion condition of the turbid material in the former current road.Measured value the results are shown in table 1, and the visualization on former current road the results are shown in table 2.
(operating condition)
As described above shown in second kind of form of implementation example, with alternately carry out from both direction when the flow direction change of former water three flushings, initial flushing along with before this till the opposite direction of the flow direction of the former water that the flows method of carrying out as benchmark.Promptly, 60 seconds of 8 hours → back flush of former water treatment → forward is washed for 60 seconds → back flush carries out this circulation repeatedly as a circulation 60 seconds.In addition, the flushing of so-called forward is meant, along with carry out back flush before the flushing carried out of the identical direction of the flow direction of former water.
The infiltration treatment conditions: operating pressure is 0.75MPa, condensed water flow 2.7m
3/ hour, water temperature is 25 ℃, former water is pH7.0.
Washing condition: valve c or valve d are all opened, and flushing flow rate is 8.0m
3/ hour, water temperature is 25 ℃.
Embodiment 2
When each flushing of embodiment 1, be 1: 1 ratio entrained air with the volume ratio of former water and air, in addition, with carrying out 2000 hours endurance running with embodiment 1 identical method of operation.The performance evaluation of reverse osmosis membrane assembly the results are shown in table 1 and table 2.
Embodiment 3
In former water treatment, replacing supply temperature continuously is 25 ℃ former water, and once a day, the temperature of supplying intermittently 1 hour is 50 ℃ a former water, in addition, uses the method for operation identical with embodiment 1, carries out 2000 hours endurance running.50 ℃ former water is by obtaining with the former water heating of heater with 25 ℃.The performance evaluation of reverse osmosis membrane assembly the results are shown in table 1 and table 2.
Embodiment 4
In former water treatment, replace the former water of pH7.0, use the former water of pH4.0, in addition, use the method for operation identical with embodiment 1, carry out 2000 hours endurance running.The former water of pH4.0 forms by add the hydrochloric acid modulation in the former water of pH7.0.The performance evaluation of reverse osmosis membrane assembly the results are shown in table 1 and table 2.
Embodiment 5
In turbidity is that 2 degree, conductance are to add 5mg/l dispersant " hypersperse MSI300 " (ARGO SCIENTIFIC corporate system) in the water for industrial use of 20mS/m, in addition, with the method for operation identical, carry out 2000 hours endurance running with embodiment 1.The performance evaluation of reverse osmosis membrane assembly the results are shown in table 1 and table 2.
Embodiment 6
Handling turbidity with the reverse osmosis membrane apparatus of flow process shown in Figure 2 is that 2 degree, conductance are the water for industrial use of 20mS/m, under following operating condition, carries out 2000 hours endurance running.Prime reverse osmosis membrane assembly 10A and back level reverse osmosis membrane assembly 10B are respectively the assemblies of 8 inches element ES-10 (day Dong Diangongshe system) that the former water-bound of the mesh of having reeled is installed, and reverse osmosis membrane apparatus uses these assemblies respectively.With carrying out the performance evaluation of reverse osmosis membrane assembly with embodiment 1 identical method.
(operating condition)
Prime reverse osmosis membrane assembly 10A and back level reverse osmosis membrane assembly 10B are, and operating pressure is 0.75MPa, and the condensed water flow is 2.7m
3/ hour, water temperature is 25 ℃, pH is 7.0, only to per 8 hours of prime reverse osmosis membrane assembly 10A once, carries out flushing similarly to Example 1.In addition, the change of the flow direction of former water is only carried out the prime reverse osmosis membrane assembly, does not carry out on the level reverse osmosis membrane assembly of back.In addition, the value in the table 1 is the value of back level reverse osmosis membrane assembly.
Comparative example 1
Handle the known pretreating device that constitutes in the prime configuration by film, the flow direction that does not change former water does not wash yet, in addition, and with carrying out with embodiment 1 identical method.That is, handling turbidity with pretreating device is that 2 degree, conductance are the water for industrial use of 20mS/m, further this processing water is carried out common processing with the commercially available reverse osmosis membrane assembly of prior art.It the results are shown in table 1 and table 2.
Comparative example 2
The operating condition that replaces embodiment 1, except that following operating condition, usefulness and embodiment 1 same method are carried out.That is, handling without pretreating device, is that 2 degree, conductance are the water for industrial use of 20mS/m with turbidity, and directly the commercially available reverse osmosis membrane assembly with prior art carries out common processing.It the results are shown in table 1 and table 2.In addition, in this comparative example 2, in the time of 800 hours, the water flowing pressure differential extremely rises, and can not obtain permeate water, so shut down constantly at this.
(operating condition)
At operating pressure is that 0.75MPa, condensed water flow are 2.7m
3/ hour, water temperature is that 25 ℃, pH are to carry out under 7.0 the condition.In addition, former water treatment was every 8 hours, interrupt former water treatment, all open and be attached to condensed water and flow out valve c on first branched pipe 151, to see through about 3 times flow of the former water supply flow of handling, make former water flow into 60 seconds of reverse osmosis membrane, the so-called forward flushing that the discharge water of cleaning is flowed out from the condensed water effuser.
Table 1
| Water flowing pressure differential [Mpa] | See through the water yield [l/ minute] | Permeate water conductance [mS/m] | ||||
| | Start of run 0.020 0.020 0.020 0.020 0.020 0.020 0.020 0.020 | 2000hr 0.035 0.031 0.035 0.035 0.033 0.020 0.022 - | Start of run 20 20 20 20 20 20 20 20 | | Start of run 0.30 0.30 0.30 0.30 0.30 0.03 0.30 0.30 | 2000hr 0.45 0.42 0.39 0.39 0.38 0.03 0.30 - |
Table 2
| The visualization result of the raw water flow behind the | |
| Embodiment | |
| 1 embodiment 2 embodiment 3 embodiment 4 embodiment 5 embodiment 6 (prime R0) embodiment 6 (rear level R0) comparative example 1 comparative example 2 | Adhere to a small amount of turbid material and adhere to a small amount of turbid material and adhere to very small amount of turbid material and adhere to very small amount of turbid material and adhere to very small amount of turbid material and adhere to hardly the complete non-cohesive turbid material of turbid material and adhere to hardly turbid material and adhere to turbid material, fully with former current road obturation |
Multi-stag diffusion barrier device processing turbidity 2 degree, conductance with flow process shown in Figure 7 are the water for industrial use of 20mS/m, under following operating condition, carry out 2000 hours endurance running.For multi-stag diffusion barrier device, use 1 reverse osmosis membrane assembly that 8 inches element ES-10 (day Dong Diangongshe system) of the former water separator of the mesh of having reeled are installed.To the performance evaluation of separating film module, the water flowing pressure differential (MPa) the when start of run of the separating film module by measuring the first order and 2000 hours, the conductance (mS/m) that sees through the water yield (l/ minute) and permeate water are carried out.In addition, after 2000 hours, the reverse osmosis membrane assembly of the first order is disintegrated, observe the adhesion condition of the turbid material in the former current road.In addition, each measured value of the separating film module of the first order the results are shown in table 8, the visualization of the former current road in the separating film module of the first order (part that the former water separator in the separating film element exists) the results are shown in table 9.In addition, embodiment in table 8 and the table 9 8～12 and comparative example 3～5 results are too.
(operating condition)
According to the activity list shown in the table 3, carry out the switching of each valve, as a circulation, repeat this circulation with the No.1～No.16 of table 3.Seeing through treatment conditions (water sampling A and B), is operating pressure 0.75MPa, condensed water flow (final level) 2.7m
3/ hour, 25 ℃ of water temperatures, former water pH7.0.In addition, washing condition (flushing A1, A2, B1 and B2) is flushing water flow 8.0m
3/ hour, 25 ℃ of water temperatures.
Table 3
| No. | Operation | Retention time | a3 | b3 | c3 | d3 | e3 | f | g | H | i | | K | m | |
| 1 | Water sampling A | 12 hours | ■ | ▲ | ■ | ■ | ▲ | ■ | |||||||
| 2 | Release pressure A | 10 seconds | ■ | ▲ | ■ | ■ | ■ | ▲ | ■ | ||||||
| 3 | | 60 seconds | ■ | ■ | ■ | ||||||||||
| 4 | | 60 seconds | ■ | ■ | ■ | ■ | |||||||||
| 5 | | 60 seconds | ■ | ■ | ■ | ||||||||||
| 6 | | 60 seconds | ■ | ■ | ■ | ■ | |||||||||
| 7 | Flushing B1 | 30 seconds | ■ | ■ | ■ | ||||||||||
| 8 | Flushing B2 | 30 seconds | ■ | ■ | ■ | ■ | |||||||||
| 9 | | 12 hours | ■ | ▲ | ■ | ■ | ▲ | ■ | |||||||
| 10 | | 10 seconds | ■ | ▲ | ■ | ■ | ■ | ▲ | ■ | ||||||
| 11 | | 60 seconds | ■ | ■ | ■ | ||||||||||
| 12 | | 60 seconds | ■ | ■ | ■ | ■ | |||||||||
| 13 | | 60 seconds | ■ | ■ | ■ | ||||||||||
| 14 | | 60 seconds | ■ | ■ | ■ | ■ | |||||||||
| 15 | Flushing A1 | 30 seconds | ■ | ■ | ■ | ||||||||||
| 16 | Flushing A2 | 30 seconds | ■ | ■ | ■ | ■ |
(notes) space: the valve full cut-off, ■: the valve standard-sized sheet, ▲: open valve in the mode that becomes suitable pressure
Embodiment 8
When each flushing A1 of embodiment 7, A2, B1 and B2, be 1: 1 mode entrained air with the volume ratio of former water and air, in addition,, carry out 2000 hours endurance running with the method for operation same with embodiment 7.The performance evaluation of separating film module the results are shown in table 8 and table 9.
Embodiment 9
In former water treatment, replace former water without interruption of 25 ℃ of temperature, after carrying out 23 hours the supply of 25 ℃ former water, supply 1 hour 50 ℃ former water, and carry out repetition, supply intermittently, in addition, with the method for operation same, carry out 2000 hours endurance running with embodiment 7.50 ℃ former water is by 25 ℃ former water is obtained with the heater heating.The performance evaluation of separating film module the results are shown in table 8 and table 9.
In former water treatment, replace the former water of pH7.0, use the former water of pH4.0, in addition,, carry out 2000 hours endurance running with the method for operation same with embodiment 7.The former water of pH4.0 is to add hydrochloric acid by the former water to pH7.0 to be modulated into.The performance evaluation of separating film module the results are shown in table 8 and table 9.
In turbidity is that 2 degree, conductance are to add the dispersant " hypersperse MSI300 " (ARGO SCIENTIFIC corporate system) of 50mg/l in the water for industrial use of 20mS/m, in addition, with the method for operation same, carry out 2000 hours endurance running with embodiment 7.The performance evaluation of separating film module the results are shown in table 8 and table 9.
Comparative example 3
Be configured to the known ultra-filtration filters film device that pre-treatment is a purpose in prime, only carry out the water sampling operation of table 4, in addition, method is similarly to Example 7 carried out.That is, use pretreating device, handling turbidity is that 2 degree, conductance are the water for industrial use of 20mS/m, and this processing water is further carried out common processing with the multi-stag diffusion barrier device that separating film module commercially available in the prior art connects into two-stage.It the results are shown in table 8 and table 9.
Table 4
| No. | Operation | Retention time | a3 | b3 | c3 | d3 | e3 | f | g | h | i | | k | M | |
| 1 | Water sampling | 2000 hours | ■ | ▲ | ■ | ■ | ▲ | ■ |
(notes) space: the valve full cut-off, ■: the valve standard-sized sheet, ▲: open valve in the mode that becomes suitable pressure
Comparative example 4
Except that changing to following operating condition, with carrying out with embodiment 7 identical methods.That is, handle without pretreating device, with turbidity be 2 degree, conductance is the water for industrial use of 20mS/m, directly uses the multi-stag diffusion barrier device of the two-stage that the commercially available separating film module with prior art connects into to carry out common processing.It the results are shown in table 8 and table 9.In addition, in comparative example 4, in the time of 800 hours, the water flowing pressure differential extremely rises, and can not obtain permeate water, so, shut down constantly at this.
(operating condition)
At operating pressure is 0.75Mpa, condensed water flow 2.7m
3/ hour, water temperature is that 25 ℃, former water are to carry out under the condition of pH7.0.In addition,, carry out the switching of each valve, No.1 and 2 as a circulation, is carried out repetition according to the operation of table 5.
Table 5
| No. | Operation | Retention time | a3 | b3 | c3 | d3 | e3 | f | g | h | i | | k | m | |
| 1 | Water sampling | 8 hours | ■ | ▲ | ■ | ■ | ▲ | ■ | |||||||
| 2 | | 60 seconds | ■ | ■ | ■ | ■ |
(notes) space: the valve full cut-off, ■: the valve standard-sized sheet, ▲: open valve in the mode that becomes suitable pressure
Handling turbidity with the multi-stag diffusion barrier device of flow process shown in Figure 3 is that 2 degree, conductance are the water for industrial use of 20mS/m, carries out 2000 hours endurance running under following operating condition.The water flowing pressure differential (MPa) of the start of run level of the separating film module 20a of the performance evaluation of separating film module by measuring the first order in the time of 2000 hours, the conductance (mS/m) that sees through the water yield (1/ minute) and permeate water are carried out.In addition, after 2000 hours,, observe the situation of adhering to of the interior turbid material of raw water flow with the separating film module 20a disintegration of the first order.Measured value the results are shown in table 8, the visualization of raw water flow the results are shown in table 9.
(operating condition)
Carry out the switching of each valve according to the activity list of table 6, the operation No.1 in the table 6～No.16 as a circulation, is carried out this circulation repeatedly.See through treatment conditions (water sampling A level B) and be operating pressure 0.75MPa, condensed water flow (afterbody) 4.4m
3/ hour, 25 ℃ of water temperatures, former water pH7.0, washing condition (flushing A1, A2, B1 and B2) is that the flushing water flow is 8.0m
3/ hour, 25 ℃ of water temperatures.
Table 6
| No. | Operation | Retention time | | a2 | B | 1 | b2 | c1 | c2 | | d2 | E | 1 | e2 | f | G | h | i | | k | m | |
| 1 | Water sampling A | 12 hours | ■ | ■ | ▲ | ▲ | ■ | ■ | ■ | ▲ | ■ | |||||||||||
| 2 | Release pressure A | 10 seconds | ■ | ■ | ▲ | ▲ | ■ | ■ | ■ | ■ | ▲ | ■ | ||||||||||
| 3 | | 60 seconds | ■ | ■ | ■ | ■ | ■ | |||||||||||||||
| 4 | | 60 seconds | ■ | ■ | ■ | ■ | ■ | ■ | ||||||||||||||
| 5 | | 60 seconds | ■ | ■ | ■ | ■ | ■ | |||||||||||||||
| 6 | | 60 seconds | ■ | ■ | ■ | ■ | ■ | ■ | ||||||||||||||
| 7 | Flushing B1 | 30 seconds | ■ | ■ | ■ | ■ | ■ | |||||||||||||||
| 8 | Flushing B2 | 30 seconds | ■ | ■ | ■ | ■ | ■ | ■ | ||||||||||||||
| 9 | | 12 hours | ■ | ■ | ▲ | ▲ | ■ | ■ | ■ | ▲ | ■ | |||||||||||
| 10 | | 10 seconds | ■ | ■ | ▲ | ▲ | ■ | ■ | ■ | ■ | ▲ | ■ | ||||||||||
| 11 | | 60 seconds | ■ | ■ | ■ | ■ | ■ | |||||||||||||||
| 12 | | 60 seconds | ■ | ■ | ■ | ■ | ■ | ■ | ||||||||||||||
| 13 | | 60 seconds | ■ | ■ | ■ | ■ | ■ | |||||||||||||||
| 14 | | 60 seconds | ■ | ■ | ■ | ■ | ■ | ■ | ||||||||||||||
| 15 | Flushing A1 | 30 seconds | ■ | ■ | ■ | ■ | ■ | |||||||||||||||
| 16 | Flushing A2 | 30 seconds | ■ | ■ | ■ | ■ | ■ | ■ |
(notes) space: the valve full cut-off, ■: the valve standard-sized sheet, ▲: open valve in the mode that becomes suitable pressure
Comparative example 5
Except that changing into following operating condition, usefulness and embodiment 12 same methods are carried out.Promptly, without pretreating device, directly utilizing will commercially available two of separating film module, prime of the prior art, one of back level couples together the multi-stag diffusion barrier device that constitutes, to turbidity be 2 spend, water for industrial use that conductance is 20mS/m carries out common processing.It the results are shown in table 8 and table 9.In addition, in this comparative example 5, by 800 hours the time, the water flowing pressure differential extremely rises, and can not obtain permeate water, so, shut down constantly at this.
(operating condition)
At operating pressure is that 0.75MPa, condensed water flow are 4.4m
3/ hour, water temperature is that 25 ℃, former water are to carry out under the condition of pH7.0.In addition, according to the operation of table 7, carrying out the switching of each valve, is a circulation with operation No.1 and 2, repeats.
Table 7
| No. | Operation | Retention time | a1 | a2 | b1 | b2 | c1 | c2 | d1 | d2 | e1 | e2 | f | g | h | i | | k | m | |
| 1 | Water sampling | 8 hours | ■ | ■ | ▲ | ▲ | ■ | ■ | ■ | ▲ | ■ | |||||||||
| 2 | | 60 seconds | ■ | ■ | ■ | ■ | ■ | ■ |
(notes) space: the valve full cut-off, ■: the valve standard-sized sheet, ▲: open valve in the mode that becomes suitable pressure
Table 8
| Water flowing pressure differential [Mpa] | See through the water yield [l/ minute] | Permeate water conductance [mS/m] | ||||
| | Start of run 0.020 0.020 0.020 0.020 0.020 0.020 0.020 0.020 0.020 | 2000hr 0.035 0.031 0.035 0.035 0.033 0.035 0.022 - - | Start of run 20 20 20 20 20 20 20 20 20 | | Start of run 0.30 0.30 0.30 0.30 0.30 0.03 0.30 0.30 0.30 | 2000hr 0.45 0.42 0.39 0.39 0.38 0.45 0.30 - - |
Table 9
| The visualization result on the former current road behind the | |
| Embodiment | |
| 7 embodiment 8 embodiment 9 | Adhering to a small amount of turbid material adheres to a small amount of turbid material and adheres to very small amount of turbid material and adhere to very small amount of turbid material and adhere to very small amount of turbid material and adhere to a small amount of turbid material and adhere to hardly turbid material and adhere to turbid material; Fully former current road obturation is adhered to turbid material, fully with former current road obturation |
At the embodiment 1～6 of the diffusion barrier device that utilizes one-level and utilize among the embodiment 7～12 of multi-stag diffusion barrier device, after 2000 hours, the water flowing pressure differential does not rise basically, sees through the water yield and does not descend the water quality height of permeate water yet.In the performance evaluation after 2000 hours, comparative example 1 demonstrates the result inferior unlike embodiment 1～6, and comparative example 3 demonstrates the result inferior unlike embodiment 7～12, but they are provided with pretreating device, need the other place being set and cost is set.Thereby the comparison other of embodiment 1～5 is a comparative example 2, and the comparison other of embodiment 7～11 is a comparative example 4, the comparison other of embodiment 12 is a comparative example 5, comparative example 2,4 and 5, all the permeate water quantitative change becomes zero in the time of about 800 hours, and adhering to of turbid material is very serious.The comparison other of embodiment 6 is a comparative example 1, and embodiment 6 demonstrates very excellent performance, and with low cost.
Utilizability on the industry
According to the method for operation of separating film module of the present invention, can easily peel off, remove reliably the turbid material on the intersection point part that is accumulated in former water separator. In addition, the problem that the flushing flow rate that causes in reverse osmosis membrane assembly at low pressure or ultralow pressure reduces does not exist yet, simultaneously, have utilization and just closed the back pressure that takes place after the valve through the water side, the fixed lax effect that makes the polluter that is deposited on the face, can further improve the effect of flushing. In addition because by eliminating the pressure of former water supply side, eliminate before this till the pressure of pushing face, so, film is loosened to some extent, can relax is accumulated in the fixed of turbid material on face and the former water separator. According to separation membrane device of the present invention, utilize simple device can implement reliably aforementioned method of operation.
Claims (6)
1, a kind of method of operation of separating film module, this separating film module is equipped with the screw type thin-film component, this screw type thin-film component is the diffusion barrier of bag shape and former water separator are wound up on the outer peripheral face of permeate water collector pipe together and constitute, it is characterized in that, with the flow direction of the former water of this separating film module regularly or change round about aperiodically, when the flow direction of aforementioned former water changes, alternately repeatedly wash from both direction, before carrying out aforementioned flushing, eliminate carrying out pressure between former water transfer pump and the aforementioned separating film module.
2, the method for operation of separating film module as claimed in claim 1 is characterized in that, to carrying out pressure between aforementioned former water transfer pump and the aforementioned separating film module when eliminating, the valve of permeate water side is opened.
3, the method for operation of separating film module as claimed in claim 1 or 2 is characterized in that, to carrying out pressure between aforementioned former water transfer pump and the aforementioned separating film module when eliminating, the valve of former water supply side is opened fully with interior in 1 second.
4, a kind of method of operation of separating film module, this separating film module is the above multi-stag separating film module of two-stage, to 1 or the side by side separating film module of the prime of the screw type thin-film component more than 2 of configuration or the middle condensed water of separating film module group be installed, be supplied to the separating film module or the separating film module group of the back level of the screw type thin-film component more than 2 that 1 or side by side configuration are installed successively, it is characterized in that, with the flow direction of the former water of this separating film module regularly or change round about aperiodically, when the flow direction of aforementioned former water changes, alternately repeatedly wash from both direction, before carrying out aforementioned flushing, eliminate carrying out pressure between former water transfer pump and the aforementioned separating film module.
5, the method for operation of separating film module as claimed in claim 4 is characterized in that, to carrying out pressure between aforementioned former water transfer pump and the aforementioned separating film module when eliminating, the valve of permeate water side is opened.
6, as the method for operation of claim 4 or 5 described separating film modules, it is characterized in that,, the valve of former water supply side is opened fully in 1 second with interior carrying out pressure between aforementioned former water transfer pump and the aforementioned separating film module when eliminating.
Applications Claiming Priority (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002251069 | 2002-08-29 | ||
| JP2002-251069 | 2002-08-29 | ||
| JP2002251069 | 2002-08-29 | ||
| JP200329437 | 2003-02-06 | ||
| JP2003-29437 | 2003-02-06 | ||
| JP2003029437A JP4251879B2 (en) | 2002-08-29 | 2003-02-06 | Operation method of separation membrane module |
| JP200355284 | 2003-03-03 | ||
| JP2003055284A JP4225471B2 (en) | 2003-03-03 | 2003-03-03 | Operation method of multistage separation membrane module |
| JP2003-55284 | 2003-03-03 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB038068842A Division CN1331574C (en) | 2002-08-29 | 2003-06-11 | Method for operating separation membrane module and separation membrane apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101053773A true CN101053773A (en) | 2007-10-17 |
| CN101053773B CN101053773B (en) | 2011-02-16 |
Family
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB038068842A Expired - Fee Related CN1331574C (en) | 2002-08-29 | 2003-06-11 | Method for operating separation membrane module and separation membrane apparatus |
| CN2007100844823A Expired - Fee Related CN101053773B (en) | 2002-08-29 | 2003-06-11 | Method for operating separation membrane module |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB038068842A Expired - Fee Related CN1331574C (en) | 2002-08-29 | 2003-06-11 | Method for operating separation membrane module and separation membrane apparatus |
Country Status (5)
| Country | Link |
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| KR (1) | KR20050033547A (en) |
| CN (2) | CN1331574C (en) |
| AU (1) | AU2003242263A1 (en) |
| TW (1) | TWI235682B (en) |
| WO (1) | WO2004022206A1 (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009008386A1 (en) * | 2007-07-06 | 2009-01-15 | Mitsubishi Rayon Engineering Co., Ltd. | Operating method of water purifier |
| CN102019145B (en) * | 2009-09-15 | 2013-03-13 | 内蒙古工业大学 | Method for improving membrane flux and membrane assembly thereof |
| CN101711948B (en) * | 2009-10-30 | 2011-11-23 | 艾欧史密斯（上海）水处理产品有限公司 | Roll-type reverse-osmosis membrane element with variable-thickness channel net |
| KR101692689B1 (en) * | 2010-09-30 | 2017-01-04 | 코오롱인더스트리 주식회사 | System and Method for Filtering Using Positive Pressure Type Module |
| JP5743774B2 (en) * | 2011-07-25 | 2015-07-01 | 株式会社クボタ | Membrane treatment apparatus and operation method thereof |
| US10245556B2 (en) | 2012-04-15 | 2019-04-02 | Ben Gurion University Of The Negev Research And Development Authority | Method and apparatus for effecting high recovery desalination with pressure driven membranes |
| CN104736226B (en) * | 2012-04-15 | 2019-10-08 | 本古里安大学内格夫研究及发展中心 | High-recovery desalination is realized using pressure drive membrane |
| US10335739B2 (en) | 2012-04-18 | 2019-07-02 | Bl Technologies, Inc. | Spiral wound membrane element and method for cleaning spiral wound membrane sheet |
| WO2013176119A1 (en) | 2012-05-22 | 2013-11-28 | 東レ株式会社 | Membrane separation device and operation method for membrane separation device |
| JP6102921B2 (en) * | 2012-06-04 | 2017-03-29 | 東レ株式会社 | Fresh water generation method using separation membrane unit |
| JP2015009174A (en) * | 2013-06-27 | 2015-01-19 | 株式会社日立製作所 | Water treatment system and water treatment method for water treatment system |
| KR102037008B1 (en) * | 2018-12-28 | 2019-10-25 | 주식회사 한화건설 | Membrane fouling dispersion system of the RO unit using directional switching valve and maintenance method for membrane fouling dispersion |
| JP2021112689A (en) * | 2020-01-16 | 2021-08-05 | 三菱ケミカルアクア・ソリューションズ株式会社 | Operational method of reverse osmosis membrane |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5220389A (en) * | 1975-08-09 | 1977-02-16 | Dainippon Toryo Co Ltd | Process for operating a reverse osmosis or ultrafiltration device |
| JPS52156177A (en) * | 1976-06-22 | 1977-12-26 | Ishikawajima Harima Heavy Ind Co Ltd | Surface washing method of liquid treating membrane |
| JPS55121812A (en) * | 1979-03-15 | 1980-09-19 | Asahi Chem Ind Co Ltd | Method of ultrafiltration |
| JPS60804A (en) * | 1983-06-20 | 1985-01-05 | Poritetsukusu:Kk | Ultrafiltration apparatus |
| JPS60197286A (en) * | 1984-03-16 | 1985-10-05 | Jgc Corp | Treatment of stockbreeding waste water |
| CN1007621B (en) * | 1986-01-31 | 1990-04-18 | 中国科学院生态环境研究中心 | Method and equipment for membrane cleaning under reduced pressure |
| US6190557B1 (en) * | 1996-12-09 | 2001-02-20 | Nitto Denko Corporation | Spiral wound type membrane element, running method and washing method thereof |
| JPH10328537A (en) * | 1997-05-29 | 1998-12-15 | Kurita Water Ind Ltd | Membrane separation device |
| JP4583671B2 (en) * | 2000-07-19 | 2010-11-17 | 日東電工株式会社 | Operating method and cleaning method of spiral membrane element and spiral membrane module |
-
2003
- 2003-06-11 AU AU2003242263A patent/AU2003242263A1/en not_active Abandoned
- 2003-06-11 CN CNB038068842A patent/CN1331574C/en not_active Expired - Fee Related
- 2003-06-11 CN CN2007100844823A patent/CN101053773B/en not_active Expired - Fee Related
- 2003-06-11 KR KR1020047016127A patent/KR20050033547A/en not_active Application Discontinuation
- 2003-06-11 WO PCT/JP2003/007394 patent/WO2004022206A1/en active Application Filing
- 2003-08-18 TW TW092122684A patent/TWI235682B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR20050033547A (en) | 2005-04-12 |
| TWI235682B (en) | 2005-07-11 |
| CN101053773B (en) | 2011-02-16 |
| TW200404601A (en) | 2004-04-01 |
| AU2003242263A1 (en) | 2004-03-29 |
| CN1331574C (en) | 2007-08-15 |
| WO2004022206A1 (en) | 2004-03-18 |
| CN1642624A (en) | 2005-07-20 |
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