CN107638811A - A kind of reverse osmosis unit rinses closing method without reverse flow - Google Patents
A kind of reverse osmosis unit rinses closing method without reverse flow Download PDFInfo
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- CN107638811A CN107638811A CN201710986192.1A CN201710986192A CN107638811A CN 107638811 A CN107638811 A CN 107638811A CN 201710986192 A CN201710986192 A CN 201710986192A CN 107638811 A CN107638811 A CN 107638811A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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Abstract
A kind of reverse osmosis unit rinses closing method, alternative current shutdown backwashing manner, counter-infiltration and NF membrane application suitable for fields such as industrial desalted water, reusing sewage, desalinizations without reverse flow.The present invention can avoid the mechanical injuries caused by reverse flow impact composite film caused by the osmotic pressure, while by counter-infiltration in industry, effective desalination life-span upgrading 30 ~ 50% of NF membrane, 100 ~ 200% can be lifted in the case of high salt.
Description
Technical field
This patent is related to reverse osmosis unit and rinses closing method, and in particular to a kind of reverse osmosis unit rushes without reverse flow
Wash closing method, alternative current shutdown backwashing manner, suitable for fields such as industrial desalted water, reusing sewage, desalinizations
Film application, it can also expand to nanofiltration to rinse without reverse flow and shut down.
Background technology
Counter-infiltration at present, nanofiltration turn into prevailing technology in fields such as desalinization, industrial desalted water, stain disease reuses,
When reverse osmosis unit is shut down, standard practice is to stop high-pressure pump slowly（About 30 seconds）, then cutoff water pump, then entered with production water or high-quality
Water rinses whole membranous system.
It is well known that reverse osmosis membrane or NF membrane are to lean on to apply high pressure to feedwater and overcome osmotic pressure to complete desalination, concentrated
Journey.Generally, seawater salt content is 35000mg/L, osmotic pressure 2.9MPa；In wastewater treatment, when salt amount is
During 70000mg/L, osmotic pressure is up to 6.0MPa.When reverse osmosis unit high-pressure pump instantaneous stop, film concentrated water side can be because oozing naturally
Existing production water backflow is appeared, a certain degree of production water resorption is advantageous to pollutant and floated from film surface, but works as and intake as seawater or height
During salinity water, produce instant water resorption pressure and water is larger, compound film sheet may be caused to be layered, serious meeting causes film composite junction
The physical destruction of structure, cause the reduction of membrane component salt rejection rate, do not possess desalting ability even.
Water resorption is produced to solve reverse-osmosis membrane element, film supplier requires that the net back pressure of film must not be higher than 0.03MPa, but i.e.
It is 1000mg/L to make concentrated water side salt content, also can be to generation 0.084MPa osmotic pressure.Above-mentioned routine stops high-pressure pump and shuts down journey slowly
Sequence, because high-pressure pump shutdown and membrane stack flushing process are discontinuous, production water resorption occurs for high-pressure pump stop moment, and concentrated water salt content is got over
Height, reverse power is bigger, so the reverse flow shock problem of film device generally existing at this stage, will fundamentally solve this and ask
Topic, it is necessary to be carried out continuously high-pressure pump shutdown and flushing, complete to be oozed with production water displacement concentrated water side concentrated water, thorough eliminate before shutdown
Pressure thoroughly, and then avoid reverse flow.
One kind disclosed in Application No. CN1055236096A patent document fills without reverse flow nanofiltration device or counter-infiltration
Put and its closing method, and one kind disclosed in Application No. CN205294916U patent document without reverse flow nanofiltration device or
Reverse osmosis unit, it is proposed that the concept of reverse flow, but following three points deficiency be present：1. due to consider NF production water and concentrated water it is independent
Recovery, start and stop process is excessively complicated, can further simplify；2. the patent emphasis is discussed to three sections of films of high pressure, not right
Other film combinations illustrate, really most appropriate using the technology in three sections of films, and effect is also the most obvious, but is used as skill
Art is expanded, it is necessary to which various combinations are illustrated；3. use range should expand to all industrial desalted waters, sewage returns
With fields such as, desalinizations, and high-salinity wastewater zero-emission is not merely confined to, while is shut down also widenable to without anti-without reverse flow
Rinse and shut down to stream.By discussed above, it is necessary to which the technology that will be shut down without reverse flow further expands application, benefits whole row
Industry.
The content of the invention
Reverse flow shock problem caused by order to overcome high-pressure pump shutdown flushing discontinuous, the present invention provide a kind of counter-infiltration
Device rinses closing method without reverse flow.The present invention can avoid the reverse flow impact composite film caused by osmotic pressure from causing
Mechanical injuries,, can in the case of high salt while by counter-infiltration in industry, effective desalination life-span upgrading 30 ~ 50% of NF membrane
Lifting 100 ~ 200%.
To achieve these goals, the present invention is to the technical scheme of single hop reverse osmosis unit use：
A kind of reverse osmosis unit rinses closing method without reverse flow, and raw water tank T-01 outlet passes through feed pump P-01, feedwater
Valve V-01 connection cartridge filters F-01 import；Cartridge filter F-01 outlet is filled by high-pressure pump P-02 connections counter-infiltration
The import put；The concentrated water outlet of reverse osmosis unit is connected to and concentrated water tank T-03, concentrated water discharge pipeline set concentrated water discharge valve V-
03；Concentrated water outlet simultaneously is also connected to high-pressure pump P-02 import by the check-valves that flows back；Reverse osmosis unit production water connection production water
Tank T-02 import；Produce water pot T-02 import of the outlet through flush water pump P-03, flushing valve V-02 connection high-pressure pumps P-02；Its
It is characterised by, specifically rinsing shutdown procedure without reverse flow comprises the following steps：
1）Before shutdown, reverse osmosis unit normal operation, feed pump P-01, high-pressure pump P-02, water-supply valve V-01 are kept it turned on, and are rinsed
Water pump P -03, flushing valve V-02, concentrated water discharge valve V-03 are remained turned-off；
2）The production water-carrying capacity F2 of high-pressure pump P-02 variable frequency adjustment and reverse osmosis unit is chain, keep production water-carrying capacity F2 stable,
Flush water pump P-03, flushing valve V-02 are opened, closes feed pump P-01, water-supply valve V-01, produces the production water in water pot T-02 through punching
Wash water pump P-03 enters reverse osmosis unit；
3）High pressure pump outlet pressure P1 is reduced by the automatic frequency reducings of production water-carrying capacity F2 feedback control high-pressure pumps P-02, works as high pressure pump outlet
When pressure P1 is down to low value and no longer changed, show that concentrated water is replaced by production water completely in film；
4）High-pressure pump P-02 is closed, flush water pump P-03 is continued to run with, and into film cleaning procedure, opens concentrated water discharge valve V-03,
After requirement washing time is reached, flush water pump P-03, flushing valve V-02, concentrated water discharge valve V-03 are closed, no reverse flow is shut down
Cleaning procedure is completed.
For two sections of reverse osmosis units without booster pump, the reverse osmosis unit includes two sections of counter-infiltrations, and two sections without supercharging
Pump reverse osmosis unit is similar with single hop reverse osmosis unit, and difference is that the concentrated water outlet of one section of reverse osmosis (RO) -01 is connected to two sections instead
RO-02 import is permeated, one section of concentrated water discharge valve V-04 is set on pipeline；The concentrated water outlet of two sections of reverse osmosis (RO)s -02 is reverse osmosis
The concentrated water outlet of saturating device；The production of one section of reverse osmosis (RO) -01, two sections of reverse osmosis (RO)s -02 is hydrated and rear outer delivery outlet is counter-infiltration
The production water out of device；Specifically shutdown procedure is rinsed without reverse flow to comprise the following steps：
1）Before shutdown, reverse osmosis unit normal operation, feed pump P-01, high-pressure pump P-02, water-supply valve V-01 are kept it turned on, and are rinsed
Water pump P -03, flushing valve V-02, concentrated water discharge valve V-03, one section of concentrated water discharge valve V-04 are remained turned-off；
2）High-pressure pump P-02 variable frequency adjustment and the production water-carrying capacity F2 of one section of reverse osmosis (RO) -01 is chain, keep production water-carrying capacity F2
It is stable, flush water pump P-03, flushing valve V-02 are opened, closes feed pump P-01, water-supply valve V-01, produces the production water in water pot T-02
Enter reverse osmosis unit through flush water pump P-03；
3）High pressure pump outlet pressure P1 is reduced by the automatic frequency reducings of production water-carrying capacity F2 feedback control high-pressure pumps P-02, works as high pressure pump outlet
When pressure P1 is down to low value and no longer changed, show that concentrated water is replaced by production water completely in film；
4）Close high-pressure pump P-02, flush water pump P-03 continues to run with, into film cleaning procedure, open concentrated water discharge valve V-03,
One section of concentrated water discharge valve V-04, after requirement washing time is reached, close flush water pump P-03, flushing valve V-02, concentrated water discharge
Valve V-03, one section of concentrated water discharge valve V-04, no reverse flow are shut down cleaning procedure and completed.
For two sections of reverse osmosis units for having booster pump, two sections without the reverse osmosis unit of booster pump on the basis of, one
Increase by one section of booster pump P-03 between the concentrated water outlet of section reverse osmosis (RO) -01 and the entrance of two sections of reverse osmosis (RO)s -02；
Specifically shutdown procedure is rinsed without reverse flow to comprise the following steps：
1）Before shutdown, reverse osmosis unit normal operation, feed pump P-01, high-pressure pump P-02, one section of booster pump P-04, water-supply valve V-
01 is kept it turned on, and flush water pump P-03, flushing valve V-02, concentrated water discharge valve V-03, one section of concentrated water discharge valve V-04 are remained turned-off；
2）Chain, one section of booster pump P-04 by high-pressure pump P-02 variable frequency adjustment and the production water-carrying capacity F2 of one section of reverse osmosis (RO) -01
It is chain with the production water-carrying capacity F4 of two sections of counter-infiltrations, keep one section of counter-infiltration, two sections of reverse osmosis produced water-carrying capacity F2, F4 constant, open
Flush water pump P-03, flushing valve V-02, feed pump P-01, water-supply valve V-01 are closed, produce the production water in water pot T-02 through flushing water
Pump P-03 enters reverse osmosis unit；
3）High pressure pump outlet pressure P1 is reduced by the automatic frequency reducings of the production water-carrying capacity F2 feedback control high-pressure pumps P-02 of one section of counter-infiltration,
The automatic frequency reducings of one section of booster pump P-04 of production water-carrying capacity F4 feedback controls of two sections of counter-infiltrations reduce by one section of booster pump outlet pressure P5,
When one section of booster pump outlet pressure P5, which is down to, as little as no longer to be changed, show that concentrated water is replaced by production water completely in film；
4）One section of booster pump P-04 is closed, closes high-pressure pump P-02 after maintaining a period of time, flush water pump P-03 is continued to run with, entered
Enter film cleaning procedure, open concentrated water discharge valve V-03, one section of concentrated water discharge valve V-04, after requirement washing time is reached, close
Flush water pump P-03, flushing valve V-02, concentrated water discharge valve V-03, one section of concentrated water discharge valve V-04, no reverse flow, which is shut down, rinses journey
Sequence is completed.
For three sections of reverse osmosis unit, the reverse osmosis unit includes three sections of counter-infiltrations, one section of reverse osmosis (RO) -01 it is dense
Water out is connected to the import of two sections of reverse osmosis (RO)s -02 by one section of booster pump P-04, and one section is set before one section of booster pump P-03
Concentrated water discharge valve V-04；The concentrated water outlet of two sections of reverse osmosis (RO)s -02 by two sections of booster pump P-05 be connected to three sections of reverse osmosis (RO)s -
03 import, two sections of concentrated water discharge valve V-05 are set before two sections of booster pump P-05；The three sections of concentrated water of reverse osmosis (RO) -03 outlets are reverse osmosis
The concentrated water of saturating device is exported, and regulating valve V-06 is set on concentrated water outlet line；One section of reverse osmosis (RO) -01, two sections of reverse osmosis (RO)s -
02nd, the production hydration of three sections of reverse osmosis (RO)s -03 and rear outer delivery outlet are the production water out of reverse osmosis unit.
Specifically shutdown procedure is rinsed without reverse flow to comprise the following steps：
1）Before shutdown, reverse osmosis unit normal operation, feed pump P-01, high-pressure pump P-02, one section of booster pump P-04, two sections of superchargings
Pump P-05, water-supply valve V-01, regulating valve V-06 are kept it turned on, flush water pump P-03, flushing valve V-02, concentrated water discharge valve V-03,
One section of concentrated water discharge valve V-04, two sections of concentrated water discharge valve V-05 are remained turned-off；
2）Chain, one section of booster pump P-04 by high-pressure pump P-02 variable frequency adjustment and the production water-carrying capacity F2 of one section of reverse osmosis (RO) -01
Variable frequency adjustment and the production water-carrying capacity F4 of two sections of reverse osmosis (RO)s -02 it is chain, two sections of booster pump P-05 variable frequency adjustment and three sections it is anti-
Permeate that RO-03 production water-carrying capacity F5 is chain, keep one section of counter-infiltration, two sections of counter-infiltrations, three sections of counter-infiltrations production water-carrying capacity F2,
F4, F5 are constant, open flush water pump P-03, flushing valve V-02, close feed pump P-01, water-supply valve V-01, produce in water pot T-02
Production water enter reverse osmosis unit through flush water pump P-03；
3）High pressure pump outlet pressure P1 is reduced by the automatic frequency reducings of the production water-carrying capacity F2 feedback control high-pressure pumps P-02 of one section of counter-infiltration,
The automatic frequency reducings of one section of booster pump P-03 of production water-carrying capacity F3 feedback controls of two sections of counter-infiltrations reduce by one section of booster pump outlet pressure P5,
The automatic frequency reducings of two sections of booster pump P-04 of production water-carrying capacity F4 feedback controls of three sections of counter-infiltrations reduce by two sections of booster pump outlet pressure P7,
When two sections of booster pump outlet pressure P7, which are down to low value, no longer to be changed, show that concentrated water is replaced by production water completely in film；
4）Two sections of booster pump P-05 are closed, one section of booster pump P-04 are closed after maintaining a period of time, after continuing to a period of time
Close high-pressure pump P-02, flush water pump P-03 continues to run with, into film cleaning procedure, open concentrated water discharge valve V-03, one section it is dense
Water discharging valve V-04, two sections of concentrated water discharge valve V-05, after requirement washing time is reached, close flush water pump P-03, flushing valve
V-02, concentrated water discharge valve V-03, one section of concentrated water discharge valve V-04, two sections of concentrated water discharge valve V-05, no reverse flow, which is shut down, rinses journey
Sequence is completed.
The beneficial effects of the invention are as follows：
1）By implementing to rinse shutdown technology without reverse flow, the reverse flow caused by osmotic pressure can be avoided to rinse composite film and made
Into mechanical injuries, cause the desalting effect of film to reduce；
2）The technology application can substitute tradition and shut down cleaning procedure；
3）In the case of concentrated water less salt, the application of the technology can be by counter-infiltration in industry, effective desalination life-span upgrading of NF membrane
30~50%；In the case of high salt, the application of the technology can by counter-infiltration in industry, NF membrane effective desalination life-span upgrading 100 ~
200%。
Brief description of the drawings
Fig. 1 is the schematic diagram of the single hop reverse osmosis unit of embodiment 1；
Fig. 2 is the schematic diagram of two sections of reverse osmosis units without booster pump of embodiment 2；
Fig. 3 is two sections of embodiment 3 schematic diagrames for having the reverse osmosis unit of booster pump；
Fig. 4 is the schematic diagram of three sections of reverse osmosis units of embodiment 4.
Embodiment
The present invention is further elaborated with reference to the accompanying drawings and examples, but the present invention is not limited to following implementation
Example.
Below from single hop reverse osmosis unit, two sections of reverse osmosis units, three sections of reverse osmosis units, and multi-stage reverse osmosis device pair
The collocation form of main flow counter-infiltration at present, which rinsed without reverse flow, shuts down explanation.Realize that no reverse flow is rinsed to shut down, system base
This configuration requirement：High pressure pump frequency conversion, every section of setting flowmeter, it is desirable to set before high-pressure pump and rinse water inlet.
Embodiment 1
Single hop reverse osmosis unit rinses shutdown procedure without reverse flow
Reference picture 1, intake and enter cartridge filter F-01 after feed pump P-01, after being boosted by high-pressure pump P-02, enter back into
Membrane module entrance, production water enter production water pot T-02, and concentrated water enters concentrated water tank T-03.Single hop system is generally used for desalinization,
System design needs concentrate recirculation to high-pressure pump suction inlet often, to meet that the requirement system configuration to the system rate of recovery can be real
Existing constant flow operation, ubiquitous system flow are as follows.
During shutdown, under real estate water flow mode, it is desirable to which high-pressure pump P-02 variable frequency adjustment and production water-carrying capacity F2 are chain, keep
It is constant to produce water-carrying capacity F2, opens flush water pump P-03, cutoff water pump P -01, film production water enters membranous system through flush water pump P-03, entered
Water salt content is reduced, and osmolality reduces, and outlet pressure is reduced by the automatic frequency reducings of production water-carrying capacity F2 feedback control high-pressure pumps P-02
P1, when high pressure pump outlet pressure P1, which is down to low value, no longer to be changed, show that concentrated water is replaced by production water completely in film, now can be with
Stop high-pressure pump P-02, flush water pump P-03 is continued to run with, and into film cleaning procedure, after requirement washing time is reached, stops rinsing
Water pump P -03, no reverse flow are shut down cleaning procedure and completed.The process water is shut down and is carried out continuously, and is completed in the case of malleation
With concentrated water in production water displacement film unit, avoid film driving pressure when shutting down and produce water reverse flow caused by suddenly disappearing.
Specifically rinsing shutdown procedure is：1）Before shutdown, reverse osmosis unit normal operation, feed pump P-01, high-pressure pump P-02,
Water-supply valve V-01 is kept it turned on, and flush water pump P-03, flushing valve V-02, concentrated water discharge valve V-03 are remained turned-off；
2）The production water-carrying capacity F2 of high-pressure pump P-02 variable frequency adjustment and reverse osmosis unit is chain, keep production water-carrying capacity F2 stable,
Flush water pump P-03, flushing valve V-02 are opened, closes feed pump P-01, water-supply valve V-01, produces the production water in water pot T-02 through punching
Wash water pump P-03 enters reverse osmosis unit；
3）High pressure pump outlet pressure P1 is reduced by the automatic frequency reducings of production water-carrying capacity F2 feedback control high-pressure pumps P-02, works as high pressure pump outlet
When pressure P1 is down to low value and no longer changed, show that concentrated water is replaced by production water completely in film；
4）High-pressure pump P-02 is closed, flush water pump P-03 is continued to run with, and into film cleaning procedure, opens concentrated water discharge valve V-03,
After requirement washing time is reached, flush water pump P-03, flushing valve V-02, concentrated water discharge valve V-03 are closed, no reverse flow is shut down
Cleaning procedure is completed.
Embodiment 2
Two sections of reverse osmosis units without inter-section booster rinse shutdown procedure without reverse flow
Reference picture 2, intake and enter cartridge filter after feed pump, after being boosted by high-pressure pump, into one section of membrane module, produce water
Into production supply mains, concentrated water enters two-segment film component, and two-segment film production water imports production supply mains, and concentrated water enters concentrated water tank through decompression.
To meet that needs are paramount by two sections of concentrated water partial reflux in system design to the requirement of the system rate of recovery or elimination concentration polarization
Press pump suction inlet.
The characteristics of this configuration is the high-pressure pump for overcoming the energy of one section, two sections counter-infiltration osmotic pressure all to be from front end
P-02, two sections because without pressurized measure, one or two sections of balance underactions, it is unbalance easily to there is flow.
Process is consistent with single hop reverse osmosis unit during shutdown, under real estate water flow mode, high-pressure pump P-02 variable frequency adjustment
It is chain with one section of production water-carrying capacity F2, keep one section of production water-carrying capacity F2 constant, open flush water pump P-03, cutoff water pump P -01, film production
Water enters reverse osmosis unit through flush water pump P-03, and water inlet salt content reduces, and osmotic pressure reduces, and high-pressure pump P-02 is by becoming frequency modulation
Outlet pressure P1 is saved to decline；At this point for the system for having concentrate recirculation, because concentrate recirculation is still present, one section of reverse osmosis concentrated water side
Concentration will not decline quickly, that is, will not occur to drop suddenly because rinsing water salt content at initial stage, cause one section of production water-carrying capacity F2 violent
The situation of increasing occurs, and for the reverse osmosis unit of no concentrate recirculation, rinses water salt content at initial stage and drops suddenly, and two sections of counter-infiltrations
Now flushing water not yet reaches, because high pressure pump pressure P1 is not yet reduced, it may appear that the situation that one section of production water-carrying capacity F2 surges, even
Beyond the maximum aquifer yield of film, to avoid this phenomenon from occurring, it is desirable to which high-pressure pump P-02 and one section of production water-carrying capacity F2 are chain, work as height
Press pump outlet pressure P1 stablize it is constant after, represent concentrated water be rinsed completely water displacement, can now stop high-pressure pump P-02, rinse
Water pump P -03 continues to run with, and into film cleaning procedure, after requirement washing time is reached, stops flush water pump P-03, no reverse flow
Cleaning procedure is shut down to complete.
Specifically rinsing shutdown procedure is：1）Before shutdown, reverse osmosis unit normal operation, feed pump P-01, high-pressure pump P-02,
Water-supply valve V-01 is kept it turned on, flush water pump P-03, flushing valve V-02, concentrated water discharge valve V-03, one section of concentrated water discharge valve V-04
Remain turned-off；
2）High-pressure pump P-02 variable frequency adjustment and the production water-carrying capacity F2 of one section of reverse osmosis (RO) -01 is chain, keep production water-carrying capacity F2
It is stable, flush water pump P-03, flushing valve V-02 are opened, closes feed pump P-01, water-supply valve V-01, produces the production water in water pot T-02
Enter reverse osmosis unit through flush water pump P-03；
3）High pressure pump outlet pressure P1 is reduced by the automatic frequency reducings of production water-carrying capacity F2 feedback control high-pressure pumps P-02, works as high pressure pump outlet
When pressure P1 is down to low value and no longer changed, show that concentrated water is replaced by production water completely in film；
4）Close high-pressure pump P-02, flush water pump P-03 continues to run with, into film cleaning procedure, open concentrated water discharge valve V-03,
One section of concentrated water discharge valve V-04, after requirement washing time is reached, close flush water pump P-03, flushing valve V-02, concentrated water discharge
Valve V-03, one section of concentrated water discharge valve V-04, no reverse flow are shut down cleaning procedure and completed.
Embodiment 3
Two sections of reverse osmosis units for having inter-section booster rinse shutdown procedure without reverse flow
Reference picture 3, be that inter-section booster P-04 provides supercharging for two sections of counter-infiltrations the characteristics of this configuration, ensure one, two section it is anti-
Amount of seepage balances so that two sections of reverse osmosis membrane assemblies can be fully used.It is dense due to being equipped with one section of booster pump P-04
Water backwash deployment can be arranged on high-pressure pump P-02 outlet.
Relative to the situation without inter-section booster, the key that stopping process is rinsed without reverse flow for having inter-section booster is
One section of booster pump P-04 stopping signal is held, and after P-04 is smoothly shut down, other processes and the situation without inter-section booster are complete
It is complete consistent.Detailed process is as follows：Under real estate water flow mode, high-pressure pump P-02 and one section of production water-carrying capacity F2 are chain, one section of supercharging
Pump P-04 and two sections of production water-carrying capacity F4 are chain, open flush water pump P-03, cutoff water pump P -01, film produce water through flush water pump P-03,
High-pressure pump P-02 enters reverse osmosis unit, and water inlet salt content reduces, and osmotic pressure reduces, and makes one section of production water-carrying capacity F2 increase, in F2
Feedback regulation under high-pressure pump P-02 variable frequency adjustments, outlet pressure P1 decline；At this point for the reverse osmosis unit for having concentrate recirculation,
Because concentrate recirculation is still present, one section of reverse osmosis concentrated water side concentration can progressively decline, because of one section of flow of inlet water F1, production water-carrying capacity F2
It is constant, so two sections of inflows [(F1+F3)-F2] are also constant, but the concentration of two sections of concentrated waters because one section of influent concentration declines and under
Drop, one section of booster pump P-04 frequency, which is presented, slowly to be declined.When P-04 outlet pressures P5 stops decline, two sections of reverse osmosis concentrated waters of expression
It has been rinsed water displacement completely, can have postponed to rinse 1 minute again（The specific time adjusts during debugging）, stop booster pump P-04 slowly,
Stop high-pressure pump P-02 again, flush water pump P-03 is continued to run with, and into film cleaning procedure, after requirement washing time is reached, stops rushing
Wash water pump P-03, no reverse flow are shut down cleaning procedure and completed.
Specifically rinsing shutdown procedure is：1）Before shutdown, reverse osmosis unit normal operation, feed pump P-01, high-pressure pump P-02,
One section of booster pump P-04, water-supply valve V-01 are kept it turned on, flush water pump P-03, flushing valve V-02, concentrated water discharge valve V-03, one section
Concentrated water discharge valve V-04 is remained turned-off；
2）Chain, one section of booster pump P-04 by high-pressure pump P-02 variable frequency adjustment and the production water-carrying capacity F2 of one section of reverse osmosis (RO) -01
It is chain with the production water-carrying capacity F4 of two sections of counter-infiltrations, keep one section of counter-infiltration, two sections of reverse osmosis produced water-carrying capacity F2, F4 constant, open
Flush water pump P-03, flushing valve V-02, feed pump P-01, water-supply valve V-01 are closed, produce the production water in water pot T-02 through flushing water
Pump P-03 enters reverse osmosis unit；
3）High pressure pump outlet pressure P1 is reduced by the automatic frequency reducings of the production water-carrying capacity F2 feedback control high-pressure pumps P-02 of one section of counter-infiltration,
The automatic frequency reducings of one section of booster pump P-04 of production water-carrying capacity F4 feedback controls of two sections of counter-infiltrations reduce by one section of booster pump outlet pressure P5,
When one section of booster pump outlet pressure P5, which is down to, as little as no longer to be changed, show that concentrated water is replaced by production water completely in film；
4）One section of booster pump P-04 is closed, closes high-pressure pump P-02 after maintaining a period of time, flush water pump P-03 is continued to run with, entered
Enter film cleaning procedure, open concentrated water discharge valve V-03, one section of concentrated water discharge valve V-04, after requirement washing time is reached, close
Flush water pump P-03, flushing valve V-02, concentrated water discharge valve V-03, one section of concentrated water discharge valve V-04, no reverse flow, which is shut down, rinses journey
Sequence is completed.
Embodiment 4
Three sections of reverse osmosis units rinse shutdown procedure without reverse flow
Reference picture 4, it is due to considering individually returning for NF production water concentrated waters below to Application No. CN1055236096A patent
Receive, start and stop process can further simplify, and generally, the replacement process duration is short, and replaced water only has 5 ~ 10m3, nothing
The recovery of this strand of water need to be considered；In principle three sections of films without reverse flow rinse shut down with above-mentioned two sections have inter-section booster without reverse
Stream, which rinses, shuts down completely the same, and only termination of pumping order, needs first two sections of booster pumps, another section booster pump, finally high-pressure pump again.
Specifically shutdown procedure is rinsed without reverse flow to comprise the following steps：
1）Before shutdown, reverse osmosis unit normal operation, feed pump P-01, high-pressure pump P-02, one section of booster pump P-04, two sections of superchargings
Pump P-05, water-supply valve V-01, regulating valve V-06 are kept it turned on, flush water pump P-03, flushing valve V-02, concentrated water discharge valve V-03,
One section of concentrated water discharge valve V-04, two sections of concentrated water discharge valve V-05 are remained turned-off；
2）Chain, one section of booster pump P-04 by high-pressure pump P-02 variable frequency adjustment and the production water-carrying capacity F2 of one section of reverse osmosis (RO) -01
Variable frequency adjustment and the production water-carrying capacity F4 of two sections of reverse osmosis (RO)s -02 it is chain, two sections of booster pump P-05 variable frequency adjustment and three sections it is anti-
Permeate that RO-03 production water-carrying capacity F5 is chain, keep one section of counter-infiltration, two sections of counter-infiltrations, three sections of counter-infiltrations production water-carrying capacity F2,
F4, F5 are constant, open flush water pump P-03, flushing valve V-02, close feed pump P-01, water-supply valve V-01, produce in water pot T-02
Production water enter reverse osmosis unit through flush water pump P-03；
3）High pressure pump outlet pressure P1 is reduced by the automatic frequency reducings of the production water-carrying capacity F2 feedback control high-pressure pumps P-02 of one section of counter-infiltration,
The automatic frequency reducings of one section of booster pump P-03 of production water-carrying capacity F3 feedback controls of two sections of counter-infiltrations reduce by one section of booster pump outlet pressure P5,
The automatic frequency reducings of two sections of booster pump P-04 of production water-carrying capacity F4 feedback controls of three sections of counter-infiltrations reduce by two sections of booster pump outlet pressure P7,
When two sections of booster pump outlet pressure P7, which are down to low value, no longer to be changed, show that concentrated water is replaced by production water completely in film；
4）Two sections of booster pump P-05 are closed, one section of booster pump P-04 are closed after maintaining a period of time, after continuing to a period of time
Close high-pressure pump P-02, flush water pump P-03 continues to run with, into film cleaning procedure, open concentrated water discharge valve V-03, one section it is dense
Water discharging valve V-04, two sections of concentrated water discharge valve V-05, after requirement washing time is reached, close flush water pump P-03, flushing valve
V-02, concentrated water discharge valve V-03, one section of concentrated water discharge valve V-04, two sections of concentrated water discharge valve V-05, no reverse flow, which is shut down, rinses journey
Sequence is completed.
Embodiment 5
Multi-stage reverse osmosis device rinses shutdown procedure without reverse flow
Multistage film processing system is actually the combination of two conventional reverse osmosis systems, and first order product water enters as the second level
Water, two-stage both can be unistage type or multisection type.Because the water inlet of the second level is the production water of the first order, water is now produced
It is minimum with the osmotic pressure of concentrated water（Less than 0.03MPa）, without individually considering to rinse without reverse flow, only consider that the flushing of the first order stops
Machine, the now shutdown of system and single hop or multistage situation are just the same, and here is omitted.
Embodiment 6
This patent also widenable to the above-mentioned chain termination of pumping time is found out in the debugging stage after, then the shutdown being controlled with the time
Program.
Claims (5)
1. a kind of reverse osmosis unit rinses closing method without reverse flow, raw water tank T-01 outlet by feed pump P-01, give
Water valve V-01 connection cartridge filters F-01 import；Cartridge filter F-01 outlet passes through high-pressure pump P-02 connection counter-infiltrations
The import of device；The concentrated water outlet of reverse osmosis unit is connected to and concentrated water tank T-03, concentrated water discharge pipeline set concentrated water discharge valve
V-03；Concentrated water outlet simultaneously is also connected to high-pressure pump P-02 import by the check-valves that flows back；Reverse osmosis unit production water connection production
Water pot T-02 import；Produce water pot T-02 import of the outlet through flush water pump P-03, flushing valve V-02 connection high-pressure pumps P-02；
Comprise the following steps characterized in that, specifically rinsing shutdown procedure without reverse flow：
1）Before shutdown, reverse osmosis unit normal operation, feed pump P-01, high-pressure pump P-02, water-supply valve V-01 are kept it turned on, and are rinsed
Water pump P -03, flushing valve V-02, concentrated water discharge valve V-03 are remained turned-off；
2）The production water-carrying capacity F2 of high-pressure pump P-02 variable frequency adjustment and reverse osmosis unit is chain, keep production water-carrying capacity F2 stable,
Flush water pump P-03, flushing valve V-02 are opened, closes feed pump P-01, water-supply valve V-01, produces the production water in water pot T-02 through punching
Wash water pump P-03 enters reverse osmosis unit；
3）High pressure pump outlet pressure P1 is reduced by the automatic frequency reducings of production water-carrying capacity F2 feedback control high-pressure pumps P-02, works as high pressure pump outlet
When pressure P1 is down to low value and no longer changed, show that concentrated water is replaced by production water completely in film；
4）High-pressure pump P-02 is closed, flush water pump P-03 is continued to run with, and into film cleaning procedure, opens concentrated water discharge valve V-03,
After requirement washing time is reached, flush water pump P-03, flushing valve V-02, concentrated water discharge valve V-03 are closed, no reverse flow is shut down
Cleaning procedure is completed.
2. a kind of reverse osmosis unit according to claim 1 rinses closing method without reverse flow, it is characterised in that described
Reverse osmosis unit can also be two sections have booster pump and three sections of reverse osmosis unit without booster pump, two sections.
3. a kind of reverse osmosis unit according to claim 2 rinses closing method without reverse flow, it is characterised in that for
Two sections of reverse osmosis units without booster pump, the reverse osmosis unit include two sections of counter-infiltrations, and two sections without booster pump reverse osmosis unit
Similar with single hop reverse osmosis unit, difference is that the concentrated water outlet of one section of reverse osmosis (RO) -01 is connected to entering for two sections of reverse osmosis (RO)s -02
Mouthful, one section of concentrated water discharge valve V-04 is set on pipeline；The concentrated water outlet of two sections of reverse osmosis (RO)s -02 goes out for the concentrated water of reverse osmosis unit
Mouthful；The production of one section of reverse osmosis (RO) -01, two sections of reverse osmosis (RO)s -02 is hydrated and rear outer delivery outlet is the production water out of reverse osmosis unit；
Specifically shutdown procedure is rinsed without reverse flow to comprise the following steps：
1）Before shutdown, reverse osmosis unit normal operation, feed pump P-01, high-pressure pump P-02, water-supply valve V-01 are kept it turned on, and are rinsed
Water pump P -03, flushing valve V-02, concentrated water discharge valve V-03, one section of concentrated water discharge valve V-04 are remained turned-off；
2）High-pressure pump P-02 variable frequency adjustment and the production water-carrying capacity F2 of one section of reverse osmosis (RO) -01 is chain, keep production water-carrying capacity F2
It is stable, flush water pump P-03, flushing valve V-02 are opened, closes feed pump P-01, water-supply valve V-01, produces the production water in water pot T-02
Enter reverse osmosis unit through flush water pump P-03；
3）High pressure pump outlet pressure P1 is reduced by the automatic frequency reducings of production water-carrying capacity F2 feedback control high-pressure pumps P-02, works as high pressure pump outlet
When pressure P1 is down to low value and no longer changed, show that concentrated water is replaced by production water completely in film；
4）Close high-pressure pump P-02, flush water pump P-03 continues to run with, into film cleaning procedure, open concentrated water discharge valve V-03,
One section of concentrated water discharge valve V-04, after requirement washing time is reached, close flush water pump P-03, flushing valve V-02, concentrated water discharge
Valve V-03, one section of concentrated water discharge valve V-04, no reverse flow are shut down cleaning procedure and completed.
4. a kind of reverse osmosis unit according to claim 2 rinses closing method without reverse flow, it is characterised in that for
Two sections of reverse osmosis units for having booster pump, two sections without the reverse osmosis unit of booster pump on the basis of, in one section of reverse osmosis (RO) -01
Concentrated water outlet increasing by one section of booster pump P-03 between the entrances of two sections of reverse osmosis (RO)s -02；
Specifically shutdown procedure is rinsed without reverse flow to comprise the following steps：
1）Before shutdown, reverse osmosis unit normal operation, feed pump P-01, high-pressure pump P-02, one section of booster pump P-04, water-supply valve V-
01 is kept it turned on, and flush water pump P-03, flushing valve V-02, concentrated water discharge valve V-03, one section of concentrated water discharge valve V-04 are remained turned-off；
2）Chain, one section of booster pump P-04 by high-pressure pump P-02 variable frequency adjustment and the production water-carrying capacity F2 of one section of reverse osmosis (RO) -01
It is chain with the production water-carrying capacity F4 of two sections of counter-infiltrations, keep one section of counter-infiltration, two sections of reverse osmosis produced water-carrying capacity F2, F4 constant, open
Flush water pump P-03, flushing valve V-02, feed pump P-01, water-supply valve V-01 are closed, produce the production water in water pot T-02 through flushing water
Pump P-03 enters reverse osmosis unit；
3）High pressure pump outlet pressure P1 is reduced by the automatic frequency reducings of the production water-carrying capacity F2 feedback control high-pressure pumps P-02 of one section of counter-infiltration,
The automatic frequency reducings of one section of booster pump P-04 of production water-carrying capacity F4 feedback controls of two sections of counter-infiltrations reduce by one section of booster pump outlet pressure P5,
When one section of booster pump outlet pressure P5, which is down to, as little as no longer to be changed, show that concentrated water is replaced by production water completely in film；
4）One section of booster pump P-04 is closed, closes high-pressure pump P-02 after maintaining a period of time, flush water pump P-03 is continued to run with, entered
Enter film cleaning procedure, open concentrated water discharge valve V-03, one section of concentrated water discharge valve V-04, after requirement washing time is reached, close
Flush water pump P-03, flushing valve V-02, concentrated water discharge valve V-03, one section of concentrated water discharge valve V-04, no reverse flow, which is shut down, rinses journey
Sequence is completed.
5. a kind of reverse osmosis unit according to claim 2 rinses closing method without reverse flow, it is characterised in that for
Three sections of reverse osmosis unit, the reverse osmosis unit include three sections of counter-infiltrations, and the concentrated water outlet of one section of reverse osmosis (RO) -01 passes through one
Section booster pump P-04 is connected to the import of two sections of reverse osmosis (RO)s -02, and one section of concentrated water discharge valve V- is set before one section of booster pump P-03
04；The concentrated water outlet of two sections of reverse osmosis (RO)s -02 is connected to the import of three sections of reverse osmosis (RO)s -03 by two sections of booster pump P-05, and two
Two sections of concentrated water discharge valve V-05 are set before section booster pump P-05；The three sections of concentrated water of reverse osmosis (RO) -03 outlets are the dense of reverse osmosis unit
Water out, regulating valve V-06 is set on concentrated water outlet line；One section of reverse osmosis (RO) -01, two sections of reverse osmosis (RO)s -02, three sections of reverse osmosis
Saturating RO-03 production hydration and rear outer delivery outlet are the production water out of reverse osmosis unit；
Specifically shutdown procedure is rinsed without reverse flow to comprise the following steps：
1）Before shutdown, reverse osmosis unit normal operation, feed pump P-01, high-pressure pump P-02, one section of booster pump P-04, two sections of superchargings
Pump P-05, water-supply valve V-01, regulating valve V-06 are kept it turned on, flush water pump P-03, flushing valve V-02, concentrated water discharge valve V-03,
One section of concentrated water discharge valve V-04, two sections of concentrated water discharge valve V-05 are remained turned-off；
2）Chain, one section of booster pump P-04 by high-pressure pump P-02 variable frequency adjustment and the production water-carrying capacity F2 of one section of reverse osmosis (RO) -01
Variable frequency adjustment and the production water-carrying capacity F4 of two sections of reverse osmosis (RO)s -02 it is chain, two sections of booster pump P-05 variable frequency adjustment and three sections it is anti-
Permeate that RO-03 production water-carrying capacity F5 is chain, keep one section of counter-infiltration, two sections of counter-infiltrations, three sections of counter-infiltrations production water-carrying capacity F2,
F4, F5 are constant, open flush water pump P-03, flushing valve V-02, close feed pump P-01, water-supply valve V-01, produce in water pot T-02
Production water enter reverse osmosis unit through flush water pump P-03；
3）High pressure pump outlet pressure P1 is reduced by the automatic frequency reducings of the production water-carrying capacity F2 feedback control high-pressure pumps P-02 of one section of counter-infiltration,
The automatic frequency reducings of one section of booster pump P-03 of production water-carrying capacity F3 feedback controls of two sections of counter-infiltrations reduce by one section of booster pump outlet pressure P5,
The automatic frequency reducings of two sections of booster pump P-04 of production water-carrying capacity F4 feedback controls of three sections of counter-infiltrations reduce by two sections of booster pump outlet pressure P7,
When two sections of booster pump outlet pressure P7, which are down to low value, no longer to be changed, show that concentrated water is replaced by production water completely in film；
4）Two sections of booster pump P-05 are closed, one section of booster pump P-04 are closed after maintaining a period of time, after continuing to a period of time
Close high-pressure pump P-02, flush water pump P-03 continues to run with, into film cleaning procedure, open concentrated water discharge valve V-03, one section it is dense
Water discharging valve V-04, two sections of concentrated water discharge valve V-05, after requirement washing time is reached, close flush water pump P-03, flushing valve
V-02, concentrated water discharge valve V-03, one section of concentrated water discharge valve V-04, two sections of concentrated water discharge valve V-05, no reverse flow, which is shut down, rinses journey
Sequence is completed.
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| CN201710986192.1A CN107638811A (en) | 2017-10-20 | 2017-10-20 | A kind of reverse osmosis unit rinses closing method without reverse flow |
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| CN112473374A (en) * | 2020-11-06 | 2021-03-12 | 张梅 | Semipermeable membrane desalination device and method with bidirectional forward osmosis online cleaning function |
| CN112892216A (en) * | 2021-03-31 | 2021-06-04 | 浙江浙能技术研究院有限公司 | Device and method for preventing reverse osmosis membrane back pressure from being damaged |
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| JP2007083158A (en) * | 2005-09-21 | 2007-04-05 | Fuji Electric Systems Co Ltd | Membrane filtering device with solid separator, and water treating method using it |
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Application publication date: 20180130 |