CN106865807A - A kind of multisection type reverse osmosis of by-product high concentration strong brine - Google Patents
A kind of multisection type reverse osmosis of by-product high concentration strong brine Download PDFInfo
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- 238000001223 reverse osmosis Methods 0.000 title claims abstract description 119
- 239000012267 brine Substances 0.000 title claims abstract description 70
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 title claims abstract description 70
- 239000006227 byproduct Substances 0.000 title claims abstract description 22
- 239000013535 sea water Substances 0.000 claims abstract description 52
- 238000000034 method Methods 0.000 claims abstract description 23
- 239000013505 freshwater Substances 0.000 claims abstract description 16
- 230000001172 regenerating effect Effects 0.000 claims abstract description 7
- 239000012528 membrane Substances 0.000 claims description 31
- 239000002253 acid Substances 0.000 claims description 8
- 238000001556 precipitation Methods 0.000 claims description 8
- 239000000243 solution Substances 0.000 claims description 8
- 238000001764 infiltration Methods 0.000 claims description 7
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 230000001112 coagulating effect Effects 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 239000000725 suspension Substances 0.000 claims description 6
- 239000000084 colloidal system Substances 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000007800 oxidant agent Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 238000011161 development Methods 0.000 abstract description 7
- 238000011084 recovery Methods 0.000 abstract description 5
- 238000011033 desalting Methods 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000010612 desalination reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000003651 drinking water Substances 0.000 description 2
- 235000020188 drinking water Nutrition 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 239000012266 salt solution Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- UBXAKNTVXQMEAG-UHFFFAOYSA-L strontium sulfate Chemical compound [Sr+2].[O-]S([O-])(=O)=O UBXAKNTVXQMEAG-UHFFFAOYSA-L 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 229910001410 inorganic ion Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- -1 silicate compound Chemical class 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
This application discloses a kind of multisection type reverse osmosis of by-product high concentration strong brine, belong to desalinization and concentration technique field.The multisection type reverse osmosis that the application is provided, are pre-processed and reverse-osmosis treated to seawater, and pretreated seawater carries out multistage reverse-osmosis treated after being pressurized through high-pressure pump, and latter end reverse-osmosis treated obtains the latter end strong brine of high concentration, as high concentration strong brine.This multisection type reverse osmosis carry out energy regenerating using energy recycle device to end strong brine.Compared with existing method for desalting seawater or technique, the strong brine obtained using this multisection type reverse osmosis, its concentration increased about 50%, be conducive to the subsequent development of strong brine to utilize.Up to more than 65%, ton water consumption reduces about 30% to the fresh-water recovery rate of this multisection type reverse osmosis.
Description
Technical field
The application belongs to desalinization and concentration technique field, specifically, relates to improve the rate of recovery
With the multisection type reverse osmosis of strong brine concentration.
Background technology
China is the country that freshwater resources lack, with the drastically increasing of the fast-developing and population of society
Plus, shortage of fresh water problem is more and more paid attention to.Part water shortage city faces industry
The situation of project and Drinking Water for Residents contention freshwater resources, shortage of water resources has become restriction state
One of factor of family's socio-economic development.Desalination technology is that solution coastal area freshwater resources are short
Scarce important channel, is the new strategy for increasing freshwater resources deposit, and can ensure public drinking water peace
Entirely.
Desalinization is used as strategic new industry, while need to follow " adhering to that desalinization and resource are comprehensive
Close using being combined " development principle, i.e., Seawater Desalination Industry is promoted with circular economy concept.
While desalinization is greatly developed, to focus on preserving the ecological environment, carry out concentrated seawater resource
Comprehensive utilization；Improve comprehensive utilization of resources level, reduce desalinization cost.
However, while desalinization industry is developed, the discharge of desalinization by-product strong brine is asked
Topic also becomes increasingly to protrude.Strong brine is directly discharged can cause marine environmental pollution problem, if
Strong brine discharge salt pan is evaporated brine using beach, Land Demand can be increased, with coastal area developing contradiction.
Following process treatment is carried out to strong brine can both reduce the pollution of marine environment, can also improve strong brine
Value, meet the development strategy of comprehensive utilization of resources.
Existing method for desalting seawater, mostly based on improving fresh-water recovery rate, reduce system energy consumption
Syllabus, the concentration of the by-product strong brine that it is obtained is relatively low, is unfavorable for follow-up working process.
Therefore, when desalinization industry is developed, there is provided a kind of fresh-water recovery rate is high, system energy consumption
Method that is low and can obtain high concentration strong brine is necessary.
The content of the invention
In order to solve the above-mentioned technical problem, this application discloses a kind of multisection type of by-product high concentration strong brine
Reverse osmosis, comprise the following steps：
(1) pre-process, former seawater is pre-processed, the impurity in the former seawater of removal；
(2) reverse-osmosis treated, the reverse-osmosis treated is multisection type, and the hop count of reverse-osmosis treated is designated as
N, N >=1.
Pretreated seawater carries out the reverse-osmosis treated of multistage after being pressurized through high-pressure pump, at latter end counter-infiltration
Reason obtains the latter end strong brine of high concentration, as high concentration strong brine.
In the reverse-osmosis treated：N sections of reverse-osmosis treated obtains N sections of strong brine and N sections of fresh water, N
Section strong brine carries out N+1 sections of reverse-osmosis treated after supercharging.The N+1 sections of reverse-osmosis treated with N sections
The ratio between operating pressure of reverse-osmosis treated is more than or equal to 1.2, less than or equal to 1.6.
Wherein, energy regenerating is carried out to latter end strong brine using energy recycle device.Energy recycle device will
The pressure energy of latter end strong brine is converted into mechanical energy, and mechanical energy is supplied into high-pressure pump.
Preferably, the energy recycle device is turbine type energy recycle device, its with high-pressure pump one into
Type.
Further, in the reverse-osmosis treated, the N+1 sections of effective area of reverse osmosis membrane is N sections anti-
The 40~65% of the effective area of permeable membrane.
Further, in the reverse-osmosis treated, N sections of strong brine carries out N+1 sections of reverse osmosis after supercharging
Treatment thoroughly, boost range is 1.0~3.7MPa.
Further, the pretreatment includes agent-feeding treatment.The agent-feeding treatment is molten using reducing agent and acid
Liquid：Oxidizing substance in reducing agent removal seawater；Acid solution causes that the pH value of the seawater after treatment is
5.0~6.8, prevent reverse osmosis membrane surface scale.
Preferably, the pretreatment also includes coagulating kinetics and hyperfiltration treatment.At the coagulating sedimentation
Reason includes hybrid reaction and precipitation, and colloid, suspension in removal seawater, the seawater after precipitation are surpassed
Filter is processed.The hyperfiltration treatment is processed through hyperfiltration membrane assembly, the further suspension removed in seawater,
Colloid and large biological molecule, the seawater after hyperfiltration treatment carry out agent-feeding treatment.
Preferably, the pretreatment also includes filtering.Seawater after agent-feeding treatment is passed through before reverse-osmosis treated
Filter is filtered, the particle in removal seawater more than 5 μm.
Compared with prior art, the application can be obtained including following technique effect：
1) the multisection type reverse osmosis of the by-product high concentration strong brine that the application is provided, are set using multistage
The reverse-osmosis treated put is combined with pretreatment, overall desalinization handling process is clear, scheme is simple and direct,
It is easy to operate, used beneficial to desalinization, the configuration for producing high concentration strong brine.
2) the multisection type reverse osmosis of this by-product high concentration strong brine, design ingenious reasonable, through overmulling
Retrogradation is formed sediment after the pretreatment for adding ultrafiltration, and seawater is concentrated into multisection type reverse-osmosis treated, in production
High concentration strong brine is obtained while desalination water, the comprehensive utilization ratio of resource is improve.
Compared with existing method for desalting seawater or technique, the strong brine obtained using this method, its concentration
About 50% is increased, is conducive to the subsequent development of strong brine to utilize.The fresh-water recovery rate of this method is up to 65%
More than.
3) the application reasonable disposition, the also energy to latter end strong brine carry out effective recycling, reduce
The energy consumption of desalinization.The energy regenerating that the application is used, the pressure energy of latter end strong brine is converted into
Mechanical energy, and it is supplied to high-pressure pump, high-pressure pump that its mechanical energy is converted into the pressure of seawater this mechanical energy
Energy.Energy regenerating in the application, reduces the waste of energy, and ton water consumption reduces about 30%.
Certainly, the either method for implementing the application must be not necessarily required to while reaching all the above skill
Art effect.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding of the present application, constitutes of the application
Point, the schematic description and description of the application is used to explain the application, does not constitute to the application's
Improper restriction.In the accompanying drawings：
Fig. 1 is the flow of the multisection type reverse osmosis of the by-product high concentration strong brine of the embodiment of the present application 1
Figure；
Fig. 2 is the multisection type reverse osmosis pretreatment of the by-product high concentration strong brine of the embodiment of the present application 1
Flow chart；
During Fig. 3 is the multisection type reverse osmosis of the by-product high concentration strong brine in the embodiment of the present application 2
The flow chart of pretreatment；
During Fig. 4 is the multisection type reverse osmosis of the by-product high concentration strong brine in the embodiment of the present application 3
The flow chart of pretreatment.
Specific embodiment
Presently filed embodiment is described in detail below in conjunction with drawings and Examples, thereby to the application
How application technology means can fully understand to solve technical problem and reach the implementation process of technology effect
And implement according to this.
Specification subsequent descriptions are to implement the better embodiment of the application, and so description is to illustrate this
For the purpose of the rule of application, scope of the present application is not limited to.The protection domain of the application is worked as
Depending on appended claims, the person of defining is defined.
Also, it should be noted that term " including ", "comprising" or its any other variant be intended to it is non-
It is exclusive to include, so that commodity or system including a series of key elements not only will including those
Element, but also other key elements including being not expressly set out, or also include for this commodity or be
The intrinsic key element of system.In the absence of more restrictions, limited by sentence "including a ..."
Key element, it is not excluded that also there is other identical element in the commodity or system including the key element.
Embodiment 1
As shown in Figure 1, a kind of multisection type reverse osmosis of by-product high concentration strong brine, including：
S01：Pretreatment, sediment, colloidal substance, suspended solid, microorganism in removal seawater etc.
Material；
S02：Reverse-osmosis treated, it is that multistage is set, and further carries out desalt processing to seawater, is obtained
Strong brine and fresh water；
S03, energy regenerating, the energy of the strong brine obtained to reverse-osmosis treated using energy recycle device
Reclaimed.
Seawater is pre-processed before reverse-osmosis treated is carried out, removal seawater in sediment, colloidal substance,
The materials such as suspended solid, microorganism.
Pretreatment can be that seawater of the prior art carries out the various methods of counter-infiltration pre-treatment or its have
Machine is combined, including but not limited to air-flotation process, flocculation, precipitation, filtering.As a kind of embodiment,
As shown in Figure 2, pretreatment includes agent-feeding treatment in the present embodiment, and reducing agent and acid are added in the seawater
Solution.The oxidizing substance such as chlorine residue of reducing agent removal seawater, prevent seawater to reverse osmosis membrane or other set
It is standby to cause to damage.Acid solution causes that the pH value of seawater is maintained at 5.0~6.8, prevents calcium sulfate, phosphoric acid
The deposits such as calcium, calcium carbonate, barium sulfate, strontium sulfate, metal oxide, silicate compound are anti-
Permeate on the reverse osmosis membrane for the treatment of, prevent reverse osmosis membrane surface scale.Conventional acid is sulfuric acid or hydrochloric acid.
Acid solution is added instead of antisludging agents such as existing phosphate, polymeric phosphate, polymer phosphoric acid esters, is prevented
To the water quality of strong brine be contaminated, be conducive to the subsequent development of strong brine to utilize.
Pretreated seawater carries out reverse-osmosis treated after being pressurized through high-pressure pump.Reverse-osmosis treated is multistage
Formula, is desalinated seawater, concentration using reverse osmosis membrane, various inorganic ions in retention seawater,
Colloidal substance and macromolecular substances.
The reverse-osmosis treated of multisection type, as shown in Figure 1, including：One section of reverse-osmosis treated, two sections anti-
Infiltration is processed ... ..., N sections of reverse-osmosis treated ... ... latter end reverse-osmosis treated；N >=1, N is reverse osmosis
The hop count for processing thoroughly.The hop count of reverse-osmosis treated can be set according to specific demand.Every section of reverse-osmosis treated
Respectively obtain strong brine and fresh water, the fresh water that every section of reverse-osmosis treated is obtained is discharged after collecting, N sections of reverse osmosis
N+1 sections of reverse-osmosis treated is carried out after the strong brine supercharging that permeable membrane treatment is obtained.Set according to specific circumstances
The N sections of boost range of strong brine is put, N+1 sections of reverse-osmosis treated can be carried out, boost range is
1.0~3.7MPa.
Can be carried out using different technique according to specific demand in reverse-osmosis treated.In reverse-osmosis treated
In, the N+1 sections of effective area of reverse osmosis membrane is N sections the 40~65% of the effective area of reverse osmosis membrane, profit
In the equilibrium of reverse osmosis membrane processing overall efficiency and energy consumption.
Used as a kind of preferable embodiment, in the present embodiment, N+1 sections of reverse-osmosis treated is anti-with N sections
Permeate the ratio between operating pressure for the treatment of and be more than or equal to 1.2, less than or equal to 1.6, reduce reverse-osmosis treated
Energy consumption and running cost, so as to reduce the cost of desalinization.
Latter end strong brine has pressure energy higher, using energy recycle device to the energy of latter end strong brine
Reclaimed.Latter end concentrated seawater discharges to obtain low pressure strong brine, as high concentration strong brine after energy regenerating,
For subsequent development treatment.
The pressure energy of latter end strong brine is converted into mechanical energy by energy recycle device, and this mechanical energy is provided
To high-pressure pump, its mechanical energy is converted into high-pressure pump the pressure energy of seawater, reduces the supercharging of seawater script
Energy consumption.
Energy recycle device can be various energy recycle devices common in the art, such as pressure-exchange
Energy recycle device, plunger pump type energy recycle device etc..As a kind of embodiment, in the present embodiment,
It is turbine type energy recycle device.Turbine type energy device is connected with high-pressure pump by a central shaft,
Realize the transmission of mechanical energy.
Embodiment 2
In the present embodiment, other are same as Example 1, unlike：Pre-processed in the present embodiment and also wrapped
Filtering is included, reverse-osmosis treated is two-part in the present embodiment.
In pretreatment, the seawater after agent-feeding treatment is also filtered before supercharging through filter, removes seawater
In more than 5 μm of particle, prevent the impurity in seawater from causing to damage to the device of subsequent treatment.Filtering
Device filter can be existing common various filters, such as piping filter, disc filter, security personnel
Filter etc..
Reverse osmosis membrane assembly in the present embodiment is two-part.In other embodiments, or other sections
Number.
In the present embodiment, two sections of effective areas of the reverse osmosis membrane of reverse-osmosis treated are one section of reverse-osmosis treated
Reverse osmosis membrane effective area 55%~65%；
In the present embodiment, the ratio between two sections of reverse-osmosis treateds and one section of operating pressure of reverse-osmosis treated more than etc.
In 1.5, less than or equal to 1.6, used as a kind of embodiment, the operating pressure of one section of reverse-osmosis treated is
5~6MPa, two sections of operating pressures of reverse osmosis membrane assembly are 7.5~9.2MPa.
In the present embodiment, two sections of counter-infiltrations are carried out after one section of strong brine supercharging that one section of reverse-osmosis treated is obtained
Treatment, boost range is 2.5~3.7MPa.
The multisection type reverse osmosis of the by-product high concentration strong brine provided using the present embodiment, fresh water is reclaimed
Rate is about 66%, and the energy that energy recycle device is reclaimed causes a ton water consumption reduction about 34%, and what is obtained is dense
About 10 ° of B é of the concentration of salt solution.
Embodiment 3
In the present embodiment, other are identical with embodiment 1 and/or 2, unlike：It is pre- in the present embodiment
Treatment also includes coagulating kinetics and hyperfiltration treatment, and reverse-osmosis treated is four-part form in the present embodiment.
In pretreatment, before carrying out agent-feeding treatment, seawater carries out coagulating kinetics and hyperfiltration treatment.It is mixed
Solidifying precipitation process includes hybrid reaction and precipitation, colloid, suspension in removal seawater, the sea after precipitation
Water carries out hyperfiltration treatment.Hyperfiltration treatment is processed through hyperfiltration membrane assembly, is removed using physics method for sieving
The impurity such as suspension, colloid, protein and large biological molecule in seawater more than 0.01 μm.
Reverse osmosis membrane assembly in the present embodiment is four-part form.In other embodiments, or other sections
Number.
In the present embodiment, the effective area of two sections of reverse osmosis membranes is one section of effective area of reverse osmosis membrane
48~60%, the effective area of three sections of reverse osmosis membranes is two sections the 45~55% of the effective area of reverse osmosis membrane,
The effective area of four sections of reverse osmosis membranes is three sections the 42~50% of the effective area of reverse osmosis membrane.
In the present embodiment, the ratio between two sections of reverse-osmosis treateds and one section of operating pressure of reverse-osmosis treated more than etc.
In 1.45, less than or equal to the ratio between 1.6, three sections of reverse-osmosis treateds and two sections of operating pressures of reverse-osmosis treated
More than or equal to 1.2, less than or equal to 1.5, four sections of reverse-osmosis treateds and three sections of operating pressures of reverse-osmosis treated
The ratio between be more than or equal to 1.2, less than or equal to 1.4.As a kind of embodiment, one section of behaviour of reverse-osmosis treated
Make pressure for 4~5MPa, two sections of operating pressures of reverse osmosis membrane assembly are 5.8~6.5MPa, three sections of reverse osmosis
The operating pressure of permeable membrane component is 7~8.5MPa, and the operating pressure of four sections of reverse osmosis membrane assemblies is
8.2~9.8MPa.
In the present embodiment, two sections of counter-infiltrations are carried out after one section of strong brine supercharging that one section of reverse-osmosis treated is obtained
Treatment, boost range is 1.8~2.5MPa, and three sections of reverse-osmosis treateds are carried out after two sections of strong brine superchargings,
Boost range is 1.2~2.7MPa, and four sections of reverse-osmosis treateds are carried out after three sections of strong brine superchargings, is pressurized model
It is 1.2~2.8MPa to enclose.
The multisection type reverse osmosis of the by-product high concentration strong brine provided using the present embodiment, fresh water is reclaimed
Rate is about 68%, and the energy that energy recycle device is reclaimed causes a ton water consumption reduction about 32%, and what is obtained is dense
About 11 ° of B é of the concentration of salt solution.
Described above has shown and described some preferred embodiments of the invention, but as it was previously stated, should manage
The solution present invention is not limited to form disclosed herein, is not to be taken as the exclusion to other embodiment,
And can be used for various other combinations, modification and environment, and can in invention contemplated scope described herein,
It is modified by the technology or knowledge of above-mentioned teaching or association area.And those skilled in the art are carried out changes
Dynamic and change does not depart from the spirit and scope of the present invention, then all should be in the protection of appended claims of the present invention
In the range of.
Claims (7)
1. a kind of multisection type reverse osmosis of by-product high concentration strong brine, it is characterised in that including with
Lower step：
(1) pre-process, former seawater is pre-processed, the impurity in the former seawater of removal；
(2) reverse-osmosis treated, the reverse-osmosis treated is multisection type, and the hop count of reverse-osmosis treated is designated as
N, N >=1；
Pretreated seawater carries out the reverse-osmosis treated of multistage after being pressurized through high-pressure pump, at latter end counter-infiltration
Reason obtains latter end strong brine, as high concentration strong brine；
In the reverse-osmosis treated：N sections of reverse-osmosis treated obtains N sections of strong brine and N sections of fresh water, N
Section strong brine carries out N+1 sections of reverse-osmosis treated after supercharging；
The ratio between the N+1 sections of reverse-osmosis treated and N sections of operating pressure of reverse-osmosis treated are more than or equal to
1.2, less than or equal to 1.6；
Wherein, energy regenerating is carried out to latter end strong brine using energy recycle device；Energy recycle device will
The pressure energy of latter end strong brine is converted into mechanical energy, and mechanical energy is supplied into high-pressure pump.
2. multisection type reverse osmosis of by-product high concentration strong brine as claimed in claim 1, it is special
Levy and be, the energy recycle device is turbine type energy recycle device, and it is integrally formed with high-pressure pump.
3. multisection type reverse osmosis of by-product high concentration strong brine as claimed in claim 1, it is special
Levy and be, in the reverse-osmosis treated, the N+1 sections of effective area of reverse osmosis membrane is N sections of reverse osmosis membrane
Effective area 40~65%.
4. multisection type reverse osmosis of the by-product high concentration strong brine as described in claim 1 or 3,
Characterized in that, in the reverse-osmosis treated, N sections of strong brine carries out N+1 sections of counter-infiltration after supercharging
Treatment, boost range is 1.0~3.7MPa.
5. multisection type reverse osmosis of the by-product high concentration strong brine as described in claim 1-3 is any,
Characterized in that, the pretreatment includes agent-feeding treatment；
The agent-feeding treatment uses reducing agent and acid solution：Oxidizing substance in reducing agent removal seawater；
Acid solution causes that the pH value of the seawater after treatment is 5.0~6.8, prevents reverse osmosis membrane surface scale.
6. multisection type reverse osmosis of by-product high concentration strong brine as claimed in claim 5, it is special
Levy and be, the pretreatment also includes coagulating kinetics and hyperfiltration treatment；
The coagulating kinetics include hybrid reaction and precipitation, remove colloid, suspension in seawater,
Seawater after precipitation carries out hyperfiltration treatment；
The hyperfiltration treatment is processed through hyperfiltration membrane assembly, further suspension, the glue in removal seawater
Body and large biological molecule, the seawater after hyperfiltration treatment carry out agent-feeding treatment.
7. multisection type reverse osmosis of by-product high concentration strong brine as claimed in claim 5, it is special
Levy and be, the pretreatment also includes filtering；Seawater after agent-feeding treatment is before reverse-osmosis treated through filtering
Device is filtered, the particle in removal seawater more than 5 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510907547.4A CN106865807A (en) | 2015-12-10 | 2015-12-10 | A kind of multisection type reverse osmosis of by-product high concentration strong brine |
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| CN1132108A (en) * | 1994-10-12 | 1996-10-02 | 东丽株式会社 | Reverse osmosis separating unit and its method |
| CN1440933A (en) * | 2002-02-26 | 2003-09-10 | 东丽株式会社 | Desalting method and desalting device |
| CN102249459A (en) * | 2011-06-15 | 2011-11-23 | 北京科泰兴达高新技术有限公司 | System for desalinating sea water |
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| CN1132108A (en) * | 1994-10-12 | 1996-10-02 | 东丽株式会社 | Reverse osmosis separating unit and its method |
| CN1440933A (en) * | 2002-02-26 | 2003-09-10 | 东丽株式会社 | Desalting method and desalting device |
| CN102249459A (en) * | 2011-06-15 | 2011-11-23 | 北京科泰兴达高新技术有限公司 | System for desalinating sea water |
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