CN106020292A - Reverse osmosis system and concentrated water circulation control method - Google Patents
Reverse osmosis system and concentrated water circulation control method Download PDFInfo
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- CN106020292A CN106020292A CN201610320302.6A CN201610320302A CN106020292A CN 106020292 A CN106020292 A CN 106020292A CN 201610320302 A CN201610320302 A CN 201610320302A CN 106020292 A CN106020292 A CN 106020292A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 307
- 238000001223 reverse osmosis Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000001514 detection method Methods 0.000 claims abstract description 66
- 239000013505 freshwater Substances 0.000 claims description 64
- 239000007788 liquid Substances 0.000 claims description 44
- 238000001764 infiltration Methods 0.000 claims description 31
- 230000033228 biological regulation Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000000047 product Substances 0.000 description 80
- 230000004044 response Effects 0.000 description 20
- 230000008569 process Effects 0.000 description 16
- 239000012528 membrane Substances 0.000 description 14
- 239000000243 solution Substances 0.000 description 11
- 238000001914 filtration Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 8
- 239000002994 raw material Substances 0.000 description 8
- 238000005265 energy consumption Methods 0.000 description 7
- 238000011084 recovery Methods 0.000 description 7
- 238000010612 desalination reaction Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000009825 accumulation Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 5
- 125000004122 cyclic group Chemical group 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003204 osmotic effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 241000009298 Trigla lyra Species 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000001728 nano-filtration Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000009287 sand filtration Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides a reverse osmosis system comprises a water inflow solenoid valve (hereinafter referred to as valve), a storage tank, a high-pressure pump (hereinafter referred to as pump), a reverse osmosis device, a detection device (hereinafter referred to as detection device), and a controller. The storage tank is connected with the reverse osmosis device via the pump. The reverse osmosis device is connected with the storage tank via a pipeline. The valve, the detection device, and the pump are connected with the controller. The controller, when receiving a water production control instruction, switches on the valve, and the detection device detects and receives a water production volume parameter. A method comprises steps of: sending to the pump a Nth operating pressure signal (a) in order that the pump operates according to the Nth operating pressure signal; computing the water production volume of the pump operating according to the Nth operating pressure signal depending on the water production volume parameter; when the water production volume reaches a preset water production volume corresponding to the Nth operating pressure signal, regulating the output pressure of the pump to the output pressure corresponding to a (N+1)th operating pressure signal; repeating the (a) until the water production volume reaches a preset value corresponding to a Mth operating pressure signal and then stopping operating. The method saves power consumption.
Description
Technical field
The present invention relates to reverse osmosis technology field, particularly relate to a kind of counter-infiltration system and dense water circulation controlling means.
Background technology
Water resource obtains and utilization of energy becomes the key factor affecting Development of Human Civilization at present.Either from science
The progress of technology, economic development of globalization are still from population and per capita resources consumption perspective, the present world of rapid growth
It is in the epoch of a high speed development.Therefore the utilization of water resource will become the emphasis of development in science and technology with the consumption of energy.
To become to alleviate of the exploitation at the new water source such as the recycling of sewage, bitter and sea water even solves China
Or even the important development field of World Water crisis.Membrane technology is now widely used for sewage disposal, desalinization, bitter
The fields such as desalination.The seawater desalting plant that the whole world is run more than 15000 at present exceedes half and uses reverse osmosis technology.
The most most existing RO systems all use the direct filtered model of single-stage, as shown in Figure 1, Feed in Fig. 1
Intaking for former water, Permeate is fresh water outlet, and Brine is dense water, and its energy consumption is high, causes operating cost to lack competitiveness, because of
This, energy consumption problem becomes the bottleneck of restriction reverse osmosis technology.
Summary of the invention
The embodiment of the present invention provides a kind of counter-infiltration system dense water circulation control completely or at least partially solving the problems referred to above
Method processed.
The embodiment of the present invention provides a kind of counter-infiltration system, including: entering water electromagnetic valve, storage tank, high-pressure pump, reverse osmosis dress
Put, for detecting the product water volume parameter detection device and controller producing water volume；
Described storage tank has raw water inlet, outlet, dense water inlet and dense water out, and described entering water electromagnetic valve is arranged
On the former water inlet pipeline being connected with the water inlet of described storage tank, described reverse osmosis unit has water inlet, water outlet
With dense water out, the outlet of described storage tank is connected by the water inlet of described high-pressure pump and described reverse osmosis unit, described
The dense water out of reverse osmosis unit connects the dense water inlet of described storage tank by pipeline；Described entering water electromagnetic valve, described product water
Volume parameter detection device, described high-pressure pump connect described controller respectively；
Described entering water electromagnetic valve, for opening according to the control instruction of described controller, to control described former water water inlet pipe
The conducting on road；
Described product water volume parameter detection device, for receiving the detection instruction that described controller sends, according to described inspection
Survey instruction and produce water volume parameter with predetermined period detection, and product water volume parameter is sent to described controller；
Described controller, after opening at the described entering water electromagnetic valve of control, sends operating pressure letter to described high-pressure pump
Number, and send detection instruction to described product water volume parameter detection device；When receiving described product water volume parameter, according to institute
State product water volume parameter and calculate product water volume, and send output pressure adjustment signal according to described product water volume to described high-pressure pump
Or signal out of service；
Described high-pressure pump, for running according to described operating pressure signal, and adjusts signal tune according to described output pressure
Joint output pressure or out of service according to signal out of service.
Preferably, described product water volume parameter detection device is electronic flowmeter, and described electronic flowmeter is arranged on and institute
State on the outlet pipeline of water outlet connection of reverse osmosis unit；
Described electronic flowmeter, for detecting the fresh-water flow that described reverse osmosis unit produces, and by described fresh-water flow
It is sent to described controller.
Preferably, described system also includes fresh water collecting device, described fresh water collecting device by pipeline connect described instead
The water outlet of permeability apparatus, described product water volume parameter detection device is the electronics liquid being arranged on described fresh water collecting device
Position meter；
Described electronic level, for detecting the fresh water liquid level in described fresh water collecting device, and sends out fresh water liquid level information
Give described controller.
Preferably, described system also includes: for controlling the drain control unit that the water in described storage tank is discharged, described
Drain control unit connects described controller；
Described controller, for when controlling described entering water electromagnetic valve and opening, sends to described drain control unit and cuts out
Instruction, and when described product water volume reaches corresponding with M operating pressure signal product water volume, to described drain control unit
Send OPEN, described M operating pressure signal be default described high-pressure pump whole cycle of operations in last fortune
The operating pressure signal of the high-pressure pump that line period is corresponding；Described M is the integer more than 1；
Described drain control unit, for closing according to described out code, and opens according to OPEN.
Preferably, described drain control unit includes that drain solenoid valve, described drain solenoid valve are arranged on and described storage
On the outlet pipeline that the dense water out of tank connects.
Preferably, described drain control unit includes that draining pump, described draining pump are arranged on the dense water with described storage tank
On the outlet pipeline that outlet connects.
The embodiment of the present invention provides a kind of dense water circulation controlling means based on described counter-infiltration system, including:
Described controller, when receiving product water management instruction, controls described entering water electromagnetic valve and opens, and to described product water
Volume parameter detection device sends detection instruction, so that described product water volume parameter detection device detects instruction with in advance according to described
If water volume parameter is produced in cycle detection, and receives the product water volume parameter that described product water volume parameter detection device sends；
N operating pressure signal is sent, so that described high-pressure pump is according to described N operating pressure signal to described high-pressure pump
Running, N is the integer more than or equal to 1；
When receiving the product water volume parameter that described product water volume parameter detection device sends, according to described product water volume
Parameter calculates product water volume when described high-pressure pump runs according to described N operating pressure signal；
When described product water volume reaches corresponding with N operating pressure signal default product water volume, to described high-pressure pump
Send output pressure and adjust signal, so that output pressure is adjusted to corresponding with N+1 operating pressure signal by described high-pressure pump
Output pressure；
Repeat described to send N operating pressure signals step to described high-pressure pump, until described high-pressure pump is according to described N
When product water volume when operating pressure signal runs reaches the default product water volume corresponding with M operating pressure signal, to described
High-pressure pump sends signal out of service, so that described high-pressure pump is out of service；Described M is the integer more than or equal to N.
Preferably, if described product water volume parameter detection device is electronic flowmeter, then according to described product water volume parameter
Calculate product water volume when described high-pressure pump runs according to described N operating pressure signal, including:
Described controller receives the fresh-water flow that described electronic flowmeter sends, and monitors described high-pressure pump according to described the
The time that N operating pressure signal runs；
The time run according to described N operating pressure signal according to fresh-water flow and described high-pressure pump, calculate described height
Product water volume when press pump runs according to described N operating pressure signal.
Preferably, the time run according to described N operating pressure signal according to fresh-water flow and described high-pressure pump, calculate
Product water volume when described high-pressure pump runs according to described N operating pressure signal, including:
The time run according to described N operating pressure signal according to fresh-water flow and described high-pressure pump, pass through formula
(1) product water volume when described high-pressure pump runs is calculated according to described N operating pressure signal
In formula, VProduce waterRepresent product water volume when high-pressure pump runs according to described N operating pressure signal；qProduce waterRepresent instant
Fresh-water flow；T represents the time that high-pressure pump runs under N operating pressure signal.
Preferably, if described product water volume parameter detection device is electronic liquid level gauge, then according to described product water volume parameter
Calculate product water volume when described high-pressure pump runs according to described N operating pressure signal, including:
Described controller receives the fresh water liquid level information that described electronic liquid level gauge sends；
According to described fresh water liquid level information and the area of the described fresh water collecting device of precognition, calculate described high-pressure pump according to
Product water volume when described N operating pressure signal runs.
The counter-infiltration system that the present invention provides, the dense water owing to producing reverse osmosis again circulates and carries out reverse osmosis, and makes
The dense water circulation reverse osmosis that reverse osmosis unit repeatedly produces, saves energy consumption relative to the direct filtered model of single-stage.The present invention carries
The dense water circulation controlling means of confession, it is contemplated that the relevant parameter of the membrane module of water inlet character, dense water concentration and reverse osmosis unit,
The dense water circulation reverse osmosis producing repeatedly reverse osmosis, saves energy consumption relative to the direct filtered model of single-stage.
Accompanying drawing explanation
In order to be illustrated more clearly that the present invention or technical scheme of the prior art, below will be to embodiment or prior art
In description, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is the one of the present invention
A little embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to these
Accompanying drawing obtains other accompanying drawing.
Fig. 1 is the operation logic schematic diagram of the reverse osmosis filtration system of the direct filtered model of single-stage；
Fig. 2 is the first example structure schematic diagram of counter-infiltration system of the present invention；
Fig. 3 is the structural representation of the control part of the first embodiment of counter-infiltration system of the present invention；
Fig. 4 is the energy consumption analysis figure of the counter-infiltration system of 4 grades of dense water circulation based on the present invention；
Fig. 5 is the flow chart of the present invention dense water circulation controlling means based on described counter-infiltration system.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, attached below in conjunction with in the embodiment of the present invention
Figure, is clearly and completely described the technical scheme in the embodiment of the present invention, it is clear that described embodiment is the present invention
A part of embodiment rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not having
Make the every other embodiment obtained under creative work premise, broadly fall into the scope of protection of the invention.
Fig. 2 is the first example structure schematic diagram of one counter-infiltration system of the present invention, and Fig. 3 is counter-infiltration system of the present invention
The structural representation controlling device of the first embodiment.
A kind of counter-infiltration system as shown in Figures 2 and 3, including: entering water electromagnetic valve 202, storage tank 203, high-pressure pump
204, reverse osmosis unit 205, produce the product water volume parameter detection device 209 of water volume and controller 208 for detecting；
Described storage tank 203 has raw water inlet, outlet, dense water inlet and dense water out, described entering water electromagnetic valve
202 are arranged on the former water inlet pipeline being connected with the water inlet of described storage tank 203, described reverse osmosis unit 205 have into
The mouth of a river, water outlet and dense water out, the outlet of described storage tank 203 is filled by described high-pressure pump 204 and described reverse osmosis
Putting the water inlet connection of 205, the dense water out of described reverse osmosis unit 205 connects the dense water of described storage tank 203 by pipeline
Entrance；Described entering water electromagnetic valve 202, described product water volume parameter detection device 209, described high-pressure pump 204 connect described respectively
Controller 208；
Described entering water electromagnetic valve 202, for opening according to the control instruction of described controller 208, to control described former water
The conducting of inlet pipeline；
Described product water volume parameter detection device 209, for receiving the detection instruction that described controller 208 sends, according to
Described detection instruction produces water volume parameter with predetermined period detection, and product water volume parameter is sent to described controller 208；
Described controller 208, after opening at the described entering water electromagnetic valve 202 of control, sends fortune to described high-pressure pump 204
Row pressure signal, and send detection instruction to described product water volume parameter detection device 209；Receiving described product water volume ginseng
During number, calculate according to described product water volume parameter and produce water volume, and send defeated according to described product water volume to described high-pressure pump 204
Go out pressure and adjust signal or signal out of service；
Described high-pressure pump 204, for running according to described operating pressure signal, and adjusts signal according to described output pressure
Regulation output pressure or out of service according to signal out of service.Above-mentioned all parts be described in detail below:
1, pretreatment system 201 (above-mentioned do not introduce).
2, entering water electromagnetic valve 202: after counter-infiltration system starts, described controller 208 is receiving product water management instruction
Time, control described entering water electromagnetic valve 202 and open, during inverse penetration coefficient of the present invention normally works, entering water electromagnetic valve 202 keeps
Opening, after completing a circulating filtration process, entering water electromagnetic valve 202 is closed and carries out concentrated solution (described storage after having circulated
Remaining dense water in tank 203) discharge.
3, storage tank 203: during counter-infiltration system normally works, storage tank 203 exists as surge tank, and water inlet is constantly
Squeezing into storage tank 203, the liquid in storage tank 203 is squeezed into reverse osmosis membrane post (one of reverse osmosis unit 205) by high-pressure pump 204
In, dense water circulation squeezes in described storage tank 203, now drain valve (one of the drain control unit 210 in the present invention, under
Literary composition will be introduced, generally drain solenoid valve 206) close.After completing a circulating filtration process, enter concentrated solution and discharge step
Suddenly, now high-pressure pump 204 and entering water electromagnetic valve 202 are closed, and drain valve is opened, and are discharged by the concentrated solution in storage tank 203.
4, high-pressure pump 204: during counter-infiltration system normally works, high-pressure pump 204 persistently provides entrance reverse osmosis membrane post
Required fluid pressure.In the different classification stages, high-pressure pump 204 output pressure should be controlled and reach the pressure (institute needed for level
Stating the pressure needed for level is operating pressure corresponding to stage that described high-pressure pump 204 is presently in).
5, reverse osmosis unit 205 (this illustrates as a example by sentencing reverse osmosis permeable membrane post): reverse osmosis membrane post is counter-infiltration system
Core desalination parts, the liquid through high-pressure pump 204 pressurization is separated into dense water after reverse osmosis membrane post and produces water (fresh water) two
Stock current are flowed out by different passages respectively.Wherein produce water flow directly out system as product store or transport, dense water is then
Again return storage tank 203 and be circulated filtration, and unification is discharged by storage tank 203 after a cyclic process terminates.
6, drain valve (one of drain control unit 210 hereinafter described, generally drain solenoid valve 206): at reverse osmosis
During permeable system normally works, drain valve remains off, and is retained in storage tank 203 by dense water.When a cyclic process
After end, opening drain valve, dense water is discharged into subsequent processing units from storage tank 203.
7, produce water volume parameter detection device 209: described controller 208 control described entering water electromagnetic valve 202 open time,
Detection instruction is sent to described product water volume parameter detection device 209, so that described product water volume parameter detection device 209 basis
Described detection instruction with predetermined period detection produce water volume parameter, described controller 208 according to described product water volume to described height
Press pump 204 sends output pressure and adjusts signal or signal out of service (detailed process of control is asked for an interview and is described below).
The operation principle of the present invention be described in detail below:
1, pretreatment: need it is carried out pretreatment to reach reverse osmosis system before material liquid (former water) enters counter-infiltration system
The degree that system can bear.Pretreatment system 201 needed for counter-infiltration system according to different material liquids and different size pattern
It is not quite similar, generally speaking utilizes the technology such as coagulating sedimentation, sand filtration, ultrafiltration, nanofiltration to make the float in material liquid, COD, pH
The index such as value, SDI reaches counter-infiltration system requirement, and these indexs are determined by film manufacturer selected by counter-infiltration system.
2, reverse osmosis deaslination: material liquid through pretreatment system 201 process after reach counter-infiltration system requirement after through
Storage tank 203 buffer storage and via high-pressure pump 204 pressurization enter reverse osmosis membrane post carry out filter desalination, and will produce water collect or
Person discharges, and concentrated water drainage enters dense water circulation system.Simultaneously in desalination processes, flow of inlet water needs and produces discharge holding one
Causing, namely keeping the liquid volume in storage tank 203 is certain value, and this certain value is exactly the dense water body once circulating generation
Long-pending.
3, dense water circulation: after counter-infiltration system desalination, the dense water circulation produced by filter process is returned to front end storage tank
203 and mix with material liquid (former water and the mixing water of dense water) and be circulated filtration as water inlet.
4, pressure classification: the rank of the present invention determines and being defined as of operating pressure of rank: the present invention first basis
It needs to be determined that hierarchical level (2 grades, 4 grades, 8 grades etc.), point progression the most, then the energy saved is more, but point progression more
Operating process is the most complicated at most, and concrete hierarchical level is when being required comprehensively to determine by water inlet character and the response rate, and determines with each
The accumulation response rate of level correspondence or target recovery rate.Afterwards according to the reverse osmosis membrane assembly of selected reverse osmosis unit 205 to often
The operating pressure that one-level is used is determined, in general by (that is to say the afterbody of a cyclic process) at the highest level
Operating pressure be defined as membrane module regulation the highest operating pressure, then according to hierarchical level operating pressure from back to front from height
Successively decrease successively to low, owing to the switching condition of every one-level agriculture water circulation is this grade of corresponding accumulation response rate or target recovery rate,
And accumulate the response rate and can calculate according to producing water volume, it is therefore desirable to determine that aquifer yield when every one-level is run (generally produces water body
Long-pending).
Dense water recurring series can be determined according to following formula:
The accumulative response rate of definition i-stage is ri(presetting), represents the fresh water and one adding up to produce at i-stage end
The ratio of the total raw material liquid of secondary circulation long-pending (the final fresh water volume produced and dense water volume sum).At a N level circulating filtration
In system, the target setting response rate is R, then according to hierarchical policy before, can be indicated with following formula:
5, discharge concentrated solution (dense water): after reaching the accumulation response rate or target recovery rate, close high-pressure pump 204 and water inlet
Electromagnetic valve 202, opens drain valve simultaneously, the concentrated water drainage in described storage tank 203 is gone out storage or is for further processing.
Concentrated solution of the present invention is after film post filters, and fresh water is discharged, and dense water is circulated back to former water end (W.E.) and mixes follow-up with former water
Continuous as water inlet continuation filter process.Along with the carrying out of filter process, the mixed liquid concentration of circulation concentrated solution and former water constantly on
Rise.In order to maintain certain flux, operating pressure needs to increase along with the increase of circulation fluid concentration, here it is circulating filtration mould
The classification foundation of formula.In the actual moving process of circulating filtration pattern, according to the concentrated solution osmotic pressure of different phase, such as Fig. 4
Shown in, it is assumed that process is divided into 4 grades, then dash area is just divided into 4 grades of energy consumptions can saved relative to not classification, in Fig. 4
Abscissa is relative recovery, and vertical coordinate is saline osmotic pressure (i.e. by the pressure of reverse osmosis membrane assembly).
Visible, that the present embodiment provides counter-infiltration system, the dense water owing to producing reverse osmosis again circulates and carries out reverse osmosis
Thoroughly, and make the dense water of more than 205 generation of reverse osmosis unit circulate reverse osmosis, save energy relative to the direct filtered model of single-stage
Consumption.
It is understood that the present invention is typically using the accumulative response rate as the Rule of judgment of a loop ends, and calculate
The accumulative response rate (ri=VProduce water/VTotal raw material liquid, wherein, riFor the accumulative response rate of i-stage, VProduce waterThe product water volume circulated for i-stage,
VTotal raw material liquidAmassing for default total raw material liquid, total raw material liquid amasss as the final fresh water volume produced and dense water volume sum) to lead to
The product water volume crossing circulation every time calculates, and the product water volume calculating circulation every time can be produced by described reverse osmosis unit 205
Raw fresh-water flow calculates, and accordingly, as a kind of preferred embodiment, described product water volume parameter detection device 209 can be electricity
Subflow gauge, described electronic flowmeter is arranged on the outlet pipeline that the water outlet with described reverse osmosis unit 205 is connected；
Described electronic flowmeter, for detecting the fresh-water flow that described reverse osmosis unit 205 produces, and by described fresh water stream
Amount is sent to described controller 208.
In the present embodiment, can run according to described N operating pressure signal according to fresh-water flow and described high-pressure pump 204
Time, calculate product water volume when described high-pressure pump 204 runs according to described N operating pressure signal by formula (1)
In formula, VProduce waterRepresent product water volume when high-pressure pump 204 runs according to described N operating pressure signal；qProduce waterRepresent
Instant fresh-water flow；T represents the time that high-pressure pump 204 runs under N operating pressure signal.
It is understood that electronic flowmeter can be commercially available, and low price, certainty of measurement is high, therefore originally
Embodiment calculates the product water volume of circulation every time by the fresh-water flow that electronic flowmeter detects, can simplify counter-infiltration system
Manufacturing process, cost-effective, and measure accurately.
It is understood that the product water volume calculating circulation every time can also be by being arranged on described fresh water collecting device
The liquid level that electronic liquid level gauge on 207 calculates calculates, and accordingly, as a kind of preferred embodiment, described system also includes light
Water collecting device 207, described fresh water collecting device 207 connects the water outlet of described reverse osmosis unit 205 by pipeline, described
Producing water volume parameter detection device 209 is the electronic liquid level gauge being arranged on described fresh water collecting device 207；
Described electronic level, for detecting the fresh water liquid level in described fresh water collecting device 207, and by fresh water liquid level information
It is sent to described controller 208.
It is understood that can be according to described fresh water liquid level information and the face of the described fresh water collecting device 207 of precognition
The long-pending volume (i.e. producing water volume) using existing method to calculate fresh water.
During it is understood that the error ratio measuring liquid level measures the flow of fluid in real time, certainty of measurement ratio measures flow
More reliable, more accurately.
It is understood that after described high-pressure pump 204 is out of service, when i.e. reverse osmosis process completes, described storage tank
In 203, storage is dense water entirely, therefore, in order to ensure that counter-infiltration system of the present invention can reuse, needs reverse osmosis unit
The 205 all concentrated water drainages produced go out, and accordingly, as a kind of preferred embodiment, described system also includes: be used for controlling described storage
The drain control unit 210 that water in tank 203 is discharged, described drain control unit 210 connects described controller 208；
Described controller 208, for when controlling described entering water electromagnetic valve 202 and opening, to described drain control unit 210
Send out code, and when described product water volume reaches corresponding with M operating pressure signal product water volume, to described draining
Controlling device 210 and send OPEN, the whole of described high-pressure pump 204 that described M operating pressure signal is default run week
The operating pressure signal of the high-pressure pump 204 that last cycle of operation interim is corresponding；Described M is the integer more than 1；
Described drain control unit 210, for closing according to described out code, and opens according to OPEN.
The present embodiment utilizes drain control unit 210 all to be discharged by the dense water in described storage tank 203, Jin Erke
To ensure reusing of counter-infiltration system.
Electromagnetic valve is the most reliable and the most frequently used automatically controlled device whether control piper turns on, preferred accordingly, as one
Embodiment, described drain control unit 210 includes that drain solenoid valve 206, described drain solenoid valve 206 are arranged on and described storage
On the outlet pipeline that the dense water out of tank 203 connects.
The present embodiment use drain solenoid valve 206 as drain control unit 210, it is ensured that described storage tank 203
Draining control reliability.
In view of the height of the container receiving the dense water discharged, therefore, thorough in order to ensure the dense water of described storage tank 203
Discharging, as a kind of preferred embodiment, described drain control unit 210 may also include draining pump, described draining pump be arranged on
On the outlet pipeline that the dense water out of described storage tank 203 connects.
When the present embodiment uses draining pump to control draining, the requirement to the container receiving the dense water discharged reduces (as it is put
Seated position can be higher than described storage tank 203 top or it highly can be significantly larger than described storage tank 203 top), and can protect
Demonstrate,prove dense water thoroughly to discharge.
It is true that described drain control unit 210 also can only include described draining pump, i.e. by draining pump control draining with
No, drain solenoid valve 206 and draining pump are so set than simultaneously, on the one hand cost reduces, on the other hand, if receiving the dense of discharge
When the placement location of the container of water is significantly larger than described storage tank 203 top higher than described storage tank 203 top or its height, also
Described storage tank 203 can be sealed completely, do not cause described storage tank 203 to produce and reveal.
Fig. 5 is the first embodiment flow process of the present invention dense water circulation controlling means based on described counter-infiltration system
Figure.
A kind of based on described counter-infiltration system dense water circulation controlling means as shown in Figure 5, including:
S501, described controller, when receiving product water management instruction, control described entering water electromagnetic valve and open, and to described
Produce water volume parameter detection device and send detection instruction, so that described product water volume parameter detection device is according to described detection instruction
Produce water volume parameter with predetermined period detection, and receive the product water volume parameter that described product water volume parameter detection device sends；
S502, send N operating pressure signal to described high-pressure pump, so that described high-pressure pump runs pressure according to described N
Force signal runs, and N is the integer more than or equal to 1；
It is understood that the initial value of N should be 1, add 1 when repeating this step every time.
S503, receive described product water volume parameter detection device send product water volume parameter time, according to described product
Water volume parameter calculates product water volume when described high-pressure pump runs according to described N operating pressure signal；
S504, when described product water volume reaches corresponding with N operating pressure signal default product water volume, to described height
Press pump sends output pressure and adjusts signal, so that output pressure is adjusted to and N+1 operating pressure signal pair by described high-pressure pump
The output pressure answered；
Repeat described to send N operating pressure signals step to described high-pressure pump, until described high-pressure pump is according to described N
When product water volume when operating pressure signal runs reaches the default product water volume corresponding with M operating pressure signal, to described
High-pressure pump sends signal out of service, so that described high-pressure pump is out of service；Described M is the integer more than or equal to N.
It is understood that M desirable 2,4,8 etc..
Obviously, N is the biggest, and in storage tank, dense water concentration is the highest, and the operating pressure of needs is the biggest, and M operating pressure is maximum
's.
It is understood that the present invention determines hierarchical level (2 grades, 4 grades, 8 grades etc.) the most as required, point progression more
Many, then the energy saved is more, but the progression operating process the most at most divided is the most complicated, and concrete hierarchical level is when by water inlet character
Require comprehensively to determine with the response rate, and determine the accumulation response rate corresponding with every one-level or target recovery rate.Afterwards according to selected
The operating pressure used every one-level with the reverse osmosis membrane assembly of reverse osmosis unit is determined, in general by highest level
The operating pressure of (that is to say the afterbody of a cyclic process) is defined as the highest operating pressure of membrane module regulation, then root
Successively decrease the most successively according to hierarchical level operating pressure from back to front, owing to the switching condition of every one-level agriculture water circulation is this level
The corresponding accumulation response rate or target recovery rate, and accumulate the response rate and can calculate according to producing water volume, it is therefore desirable to determine each
Aquifer yield (generally producing water volume) when level is run.
Dense water recurring series can be determined according to following formula:
The accumulative response rate of definition i-stage is ri(presetting), represents the fresh water and one adding up to produce at i-stage end
The ratio of the total raw material liquid of secondary circulation long-pending (the final fresh water volume produced and dense water volume sum).At a N level circulating filtration
In system, the target setting response rate is R, then according to hierarchical policy before, can be indicated with following formula:
The dense water circulation controlling means that the present embodiment provides, it is contemplated that water inlet character, dense water concentration and reverse osmosis unit
The relevant parameter of membrane module, the dense water circulation reverse osmosis that repeatedly reverse osmosis is produced, save relative to the direct filtered model of single-stage
Save energy consumption.
If described product water volume parameter detection device is electronic flowmeter, the most described step S603, including:
Described controller receives the fresh-water flow that described electronic flowmeter sends, and monitors described high-pressure pump according to described the
The time that N operating pressure signal runs；
The time run according to described N operating pressure signal according to fresh-water flow and described high-pressure pump, calculate described height
Product water volume when press pump runs according to described N operating pressure signal.
In the present embodiment, running according to described N according to fresh-water flow and described high-pressure pump in described step S503
The time that pressure signal runs, calculate product water volume when described high-pressure pump runs according to described N operating pressure signal, bag
Include:
The time run according to described N operating pressure signal according to fresh-water flow and described high-pressure pump, by formula (1)
Calculate product water volume when described high-pressure pump runs according to described N operating pressure signal
In formula, VProduce waterRepresent product water volume when high-pressure pump runs according to described N operating pressure signal；qProduce waterRepresent instant
Fresh-water flow；T represents the time that high-pressure pump runs under N operating pressure signal；VTotal raw material liquidRepresent total raw material liquid set in advance
Volume.
It is understood that electronic flowmeter can be commercially available, and low price, certainty of measurement is high, therefore originally
Embodiment can calculate the product water volume of circulation every time by the fresh-water flow that electronic flowmeter detects, can simplify reverse osmosis system
The manufacturing process of system, cost-effective, and measure accurately.
If described product water volume parameter detection device is electronic liquid level gauge, the most described step S503, including:
Described controller receives the fresh water liquid level information that described electronic liquid level gauge sends；
According to described fresh water liquid level information and the area of the described fresh water collecting device of precognition, calculate described high-pressure pump according to
Product water volume when described N operating pressure signal runs.
During it is understood that the error ratio measuring liquid level measures the flow of fluid in real time, certainty of measurement ratio measures flow
More reliable, more accurately.
Below by a specific embodiment explanation present invention.
Certain bitter desalination processes, material liquid be concentration be the NaCl solution electrical conductivity of 5mg/L be 9.14ms/cm, experiment
Temperature is 25 DEG C.In the case of target recovery rate is 50%, filter process being divided into 4 grades carry out, first order operating pressure is
1.7MPa, the accumulative response rate is 20%；Second level operating pressure is 2.9MPa, and the accumulative response rate is 33.3%；The third level runs
Pressure is 4.1MPa, and the accumulative response rate is 42.9%；Fourth stage operating pressure is 5.4MPa, and the accumulative response rate is 50%.Experiment
Result: clear water electrical conductivity 113.7 μ s/cm, concentrated solution electrical conductivity is 19.04ms/cm, and solute concentration is 9.87mg/L.According to sending out
Explanation in bright content, connects filtered model and 4 grades of circulating filtration patterns the most do not use energy recycle device in single-stage ordinary straight
In the case of, circulation pattern can save the energy of 44%.
Device embodiment described above is only schematically, and the wherein said unit illustrated as separating component can
To be or to may not be physically separate, the parts shown as unit can be or may not be physics list
Unit, i.e. may be located at a place, or can also be distributed on multiple NE.Can be selected it according to the actual needs
In some or all of module realize the purpose of the present embodiment scheme.Those of ordinary skill in the art are not paying creativeness
Work in the case of, be i.e. appreciated that and implement.
Through the above description of the embodiments, those skilled in the art it can be understood that to each embodiment can
The mode adding required general hardware platform by software realizes, naturally it is also possible to pass through hardware.Based on such understanding, on
State the part that prior art contributes by technical scheme the most in other words to embody with the form of software product, should
Computer software product can store in a computer-readable storage medium, such as ROM/RAM, magnetic disc, CD etc., including some fingers
Make with so that a computer equipment (can be personal computer, server, or the network equipment etc.) performs each and implements
The method described in some part of example or embodiment.
Last it is noted that above example is only in order to illustrate technical scheme, it is not intended to limit；Although
With reference to previous embodiment, the present invention is described in detail, it will be understood by those within the art that: it still may be used
So that the technical scheme described in foregoing embodiments to be modified, or wherein portion of techniques feature is carried out equivalent；
And these amendment or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (10)
1. a counter-infiltration system, it is characterised in that including: entering water electromagnetic valve, storage tank, high-pressure pump, reverse osmosis unit, be used for
Product water volume parameter detection device and the controller of water volume is produced in detection；
Described storage tank has raw water inlet, outlet, dense water inlet and dense water out, described entering water electromagnetic valve be arranged on
On the former water inlet pipeline that the water inlet of described storage tank connects, described reverse osmosis unit has water inlet, water outlet and dense
Water out, the outlet of described storage tank is connected by the water inlet of described high-pressure pump and described reverse osmosis unit, described reverse osmosis
The dense water out of device connects the dense water inlet of described storage tank by pipeline thoroughly；Described entering water electromagnetic valve, described product water volume
Parameter detection device, described high-pressure pump connect described controller respectively；
Described entering water electromagnetic valve, for opening according to the control instruction of described controller, to control described former water inlet pipeline
Conducting；
Described product water volume parameter detection device, for receiving the detection instruction that described controller sends, refers to according to described detection
Make and produce water volume parameter with predetermined period detection, and product water volume parameter is sent to described controller；
Described controller, after opening at the described entering water electromagnetic valve of control, sends operating pressure signal to described high-pressure pump, and
Detection instruction is sent to described product water volume parameter detection device；When receiving described product water volume parameter, according to described product
Water volume parameter calculates produces water volume, and adjusts signal according to described product water volume to described high-pressure pump transmission output pressure or stop
Only run signal；
Described high-pressure pump, for running according to described operating pressure signal, and it is defeated to adjust Signal Regulation according to described output pressure
Go out pressure or out of service according to signal out of service.
System the most according to claim 1, it is characterised in that described product water volume parameter detection device is electronic flow
Meter, described electronic flowmeter is arranged on the outlet pipeline that the water outlet with described reverse osmosis unit is connected；
Described electronic flowmeter, for detecting the fresh-water flow that described reverse osmosis unit produces, and sends described fresh-water flow
To described controller.
System the most according to claim 1, it is characterised in that described system also includes fresh water collecting device, described fresh water
Collection device connects the water outlet of described reverse osmosis unit by pipeline, and described product water volume parameter detection device is for being arranged on
Electronic liquid level gauge on described fresh water collecting device；
Described electronic level, for detecting the fresh water liquid level in described fresh water collecting device, and is sent to fresh water liquid level information
Described controller.
System the most according to claim 1, it is characterised in that described system also includes: be used for controlling in described storage tank
Water discharge drain control unit, described drain control unit connect described controller；
Described controller, for when controlling described entering water electromagnetic valve and opening, sending out code to described drain control unit,
And when described product water volume reaches corresponding with M operating pressure signal product water volume, send to described drain control unit
OPEN, described M operating pressure signal be default described high-pressure pump whole cycle of operations in last run week
The operating pressure signal of the high-pressure pump that the phase is corresponding；Described M is the integer more than 1；
Described drain control unit, for closing according to described out code, and opens according to OPEN.
System the most according to claim 4, it is characterised in that described drain control unit includes drain solenoid valve, described
Drain solenoid valve is arranged on the outlet pipeline that the dense water out with described storage tank is connected.
6. according to the system described in claim 4 or 5, it is characterised in that described drain control unit includes draining pump, described row
Water pump is arranged on the outlet pipeline that the dense water out with described storage tank is connected.
7. a dense water circulation controlling means based on the counter-infiltration system according to any one of power 1-6, its eigenvalue is, bag
Include:
Described controller, when receiving product water management instruction, controls described entering water electromagnetic valve and opens, and to described product water volume
Parameter detection device sends detection instruction, so that described product water volume parameter detection device instructs according to described detection with default week
Water volume parameter is produced in phase detection, and receives the product water volume parameter that described product water volume parameter detection device sends；
N operating pressure signal is sent, so that described high-pressure pump is transported according to described N operating pressure signal to described high-pressure pump
OK, N is the integer more than or equal to 1；
When receiving the product water volume parameter that described product water volume parameter detection device sends, according to described product water volume parameter
Calculate product water volume when described high-pressure pump runs according to described N operating pressure signal；
When described product water volume reaches corresponding with N operating pressure signal default product water volume, send to described high-pressure pump
Output pressure adjusts signal, so that output pressure is adjusted to the output corresponding with N+1 operating pressure signal by described high-pressure pump
Pressure；
Repeat described to send N operating pressure signals step to described high-pressure pump, until described high-pressure pump runs according to described N
When product water volume when pressure signal runs reaches the default product water volume corresponding with M operating pressure signal, to described high pressure
Pump sends signal out of service, so that described high-pressure pump is out of service；Described M is the integer more than or equal to N.
Method the most according to claim 7, it is characterised in that if described product water volume parameter detection device is electronic flow
Meter, then calculate product water body when described high-pressure pump runs according to described N operating pressure signal according to described product water volume parameter
Long-pending, including:
Described controller receives the fresh-water flow that described electronic flowmeter sends, and monitors described high-pressure pump and transport according to described N
The time that row pressure signal runs；
The time run according to described N operating pressure signal according to fresh-water flow and described high-pressure pump, calculate described high-pressure pump
Product water volume when running according to described N operating pressure signal.
Method the most according to claim 8, it is characterised in that according to fresh-water flow and described high-pressure pump according to described N
The time that operating pressure signal runs, calculate product water volume when described high-pressure pump runs according to described N operating pressure signal,
Including:
The time run according to described N operating pressure signal according to fresh-water flow and described high-pressure pump, counted by formula ()
Calculate product water volume when described high-pressure pump runs according to described N operating pressure signal
In formula, VProduce waterRepresent product water volume when high-pressure pump runs according to described N operating pressure signal；qProduce waterRepresent instant fresh water
Flow；T represents the time that high-pressure pump runs under N operating pressure signal.
Method the most according to claim 7, it is characterised in that if described product water volume parameter detection device is electronics liquid
Position meter, then calculate product water when described high-pressure pump runs according to described N operating pressure signal according to described product water volume parameter
Volume, including:
Described controller receives the fresh water liquid level information that described electronic liquid level gauge sends；
According to described fresh water liquid level information and the area of the described fresh water collecting device of precognition, calculate described high-pressure pump according to described
Product water volume when N operating pressure signal runs.
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