CN106830200A - The purification and separation method and its nanofiltration equipment of a kind of high-salt wastewater - Google Patents
The purification and separation method and its nanofiltration equipment of a kind of high-salt wastewater Download PDFInfo
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- CN106830200A CN106830200A CN201710237086.3A CN201710237086A CN106830200A CN 106830200 A CN106830200 A CN 106830200A CN 201710237086 A CN201710237086 A CN 201710237086A CN 106830200 A CN106830200 A CN 106830200A
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- 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
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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Abstract
The present invention relates to the purification and separation method and its nanofiltration equipment of a kind of high-salt wastewater, belong to wastewater purification technical field.In order to solve the problems, such as existing easy fouling, the purification and separation method and its nanofiltration equipment of a kind of high-salt wastewater are provided, the nanofiltration equipment includes that an inside has the housing of inner chamber, NF membrane is provided with housing, housing is provided with water inlet one and discharge outlet two, and water inlet one is connected with high-salt wastewater side；Discharge outlet two is connected with pure water side；The discharge outlet one being connected with high-salt wastewater side is additionally provided with housing；The housing is provided with the water inlet two being connected with pure water side.The method includes pure water is delivered into nanofiltration equipment by high-salt wastewater and by water pump two by water pump one, and high-salt wastewater and pure water is flowed through from NF membrane both sides respectively carries out nanofiltration；The pressure of high-salt wastewater side is separated more than the pressure of pure water side.The corrosion impact that the present invention can effectively solve the presence of monovalent salt in high-salt wastewater and be formed and the effect for preventing fouling.
Description
Technical field
The present invention relates to the purification and separation method and its nanofiltration equipment of a kind of high-salt wastewater, belong to wastewater purification technology
Field.
Background technology
Often produced in commercial Application substantial amounts of waste water need treatment, especially for containing a large amount of salt such as monovalent salt with
The waste water of divalence salt ion, with dissolving and the evaporation of solution, the salt content meeting more and more higher in waste water can cause substantial amounts of knot
Dirt and corrosion tendency.Therefore, it is necessary to discharge part industrial wastewater, to prevent the problem of fouling and corrosion.And due to industry
The solubility product of different salt is different in waste water, and sofening treatment need to be in advance carried out in further thickening-purification technology separating treatment.It is conventional
As using Dual alkali soften not only to consume substantial amounts of raw material, can also produce substantial amounts of sludge.Also have and do not added by addition
Purified treatment is carried out with scale remover.Also have in the prior art carries out nanofiltration removal and purification by NF membrane, as shown in figure 1, existing
Have in technology is to make high-salt wastewater monovalence salt ion and water is passed through NF membrane in the presence of water pump three using nanofiltration equipment
To realize separate.So concentrated because salt exists in high-salt wastewater side in actual applications, easily produce scale formation.As in
State's patent application (publication number：CN101830578A a kind of chemical wastewater reverse osmosis depth without addition addition antisludging agent) is disclosed
The method for spending desalting processing, pumps into nanofiltration apparatus assembly, then adjust and receive by making high salt industrial wastewater pass through nanofiltration water inlet water pump
The flow that carries out of filter membrane component is 0.20mm3/ h, operating pressure is 0.5MPa, and the nanofiltration for proceeding by high salt industrial wastewater is located in advance
Reason；Then, then by the waste water processed by nanofiltration carry out carrying out reverse-osmosis treated during pump pumps into reverse osmosis module by counter-infiltration,
Complete the disposable advanced desalination to industrial wastewater and process operation.Although it is pre-processed by nanofiltration can be to the height in waste water
Valency ion carries out retention removal, makes calcium ion, magnesium ion and sulfate ion for effectively going in waste water etc., allows to reduce reverse osmosis
The danger of permeable membrane component fouling, extends the time of reverse osmosis membrane assembly desalination.However, it can not fundamentally solve fouling
Problem, specifically, although, the effect of non-scaling can be reached on reverse osmosis membrane assembly, however, due to carrying out nanofiltration treatment
During, the characteristic of retention can not be reached to water and monovalence salt ion using NF membrane, make a part of water and low price salt ion
Can be permeated by NF membrane carries out next process, i.e., a part of water in waste water in nanofiltration process also can simultaneously by receiving
Filter membrane enters lower counter-infiltration operation together；However, as nanofiltration processing procedure reclaimed water is constantly reduced, fouling factor calcium from
Son, the concentration of magnesium ion and sulfate ion in the waste water side of NF membrane constantly increase, and make in NF membrane and nanofiltration equipment
Scale formation can be still produced on pipeline, making can not be while solves the etching problem of monovalent salt and the fouling defect of high price salt.
The content of the invention
The present invention is for defect present in above prior art, there is provided a kind of purification and separation method of high-salt wastewater and its
Nanofiltration equipment, how the problem of solution is while realizing reducing monovalence salt ion and preventing the performance of fouling.
The purpose of the present invention technical scheme is that, a kind of purification and separation method of high-salt wastewater,
Characterized in that, the method is comprised the following steps：
A, high-salt wastewater is transported to by nanofiltration equipment by water pump one；Pure water is delivered to by nanofiltration equipment by water pump two,
High-salt wastewater and pure water is flowed through NF membrane from the NF membrane both sides in nanofiltration equipment respectively again carries out nanofiltration；The nanofiltration equipment
In NF membrane side flows through high-salt wastewater is high-salt wastewater side；NF membrane opposite side in the nanofiltration equipment flows through pure water
Be pure water side；The high-salt wastewater is flowed into and discharged from the high-salt wastewater side in nanofiltration equipment；The pure water is from nanofiltration equipment
Middle pure water side flows into and discharges；
B, the Yang Cheng by adjusting water pump one and water pump two, make the pressure of high-salt wastewater side in nanofiltration equipment be more than pure water side
Pressure, monovalence salt ion in high-salt wastewater is permeated NF membrane and be diffused into pure water, reach and high-salt wastewater purified
Separate.
The present invention passes through high-salt wastewater and pure water using water pump respectively from the both sides of NF membrane by nanofiltration equipment, and by
In the concentration difference that concentration of the monovalent salt in the concentration and pure water of high-salt wastewater is formed, so that the monovalent salt in high-salt wastewater exists
Can be diffused into pure water by NF membrane in the presence of chemical energy, monovalence salinity reaches reduction or purifies in making high-salt wastewater
The effect of separation, effectively solves in high-salt wastewater and the presence of monovalent salt and the corrosion impact that is formed, meanwhile, and due to logical
Cross while be passed through the high-salt wastewater and pure water of flowing in the both sides of NF membrane, without by the water in high-salt wastewater by NF membrane
Discharge, so that the water in high-salt wastewater will not be reduced substantially, so, the ion concentration of the divalent salts in high-salt wastewater would not
The fouling because water is reduced, realizes that also fouling can be formed in the waste water side of NF membrane while monovalence salt ion is removed, and makes favourable
Extension and overall performance in the service life of NF membrane.But, and because the salinity in high-salt wastewater is come relatively
Say and be higher than corresponding concentration in pure water, the part water in pure water is diffused into because of the osmotic pressure that salinity difference is formed useless
In water, the displacement of waste water is increased, be unfavorable for industrial operation, therefore, the present invention is had found by adjusting both sides by studying
Pressure, make the pressure of the high-salt wastewater side of NF membrane more than the pressure of pure water side, overcome because of height using the pressure differential for being formed
The osmotic pressure that salinity difference between salt waste water and pure water is formed, reaches and reduces or prevent to make because of the osmotic pressure that concentration difference is formed
Water is diffused into high-salt wastewater by NF membrane, is reached and is ensured that the overall wastewater flow rate of high-salt wastewater increased will not be acted on.Entering
The processing procedure of one step, can carry out concentration again by by the pure water containing monovalent salt, and because not containing fouling in pure water
The factor will not also produce scale formation, make to reach more efficient concentration.
In the purification and separation method of above-mentioned high-salt wastewater, preferably, the pressure of the high-salt wastewater side and pure water side
Pressure initiation pressure differential be 0.5MPa~0.8MPa.By the pressure differential that makes to be formed in the scope, can more effectively hinder
Only the water penetration of NF membrane pure water side is to waste water, so that during the monovalence salt ion for ensureing in high-salt wastewater can fully penetrate into pure water
Go to reach more effectively separation.Equivalent to by the adjustment to pressure differential, can realizing preventing wastewater flow rate from increasing and efficiently separate
The double action of monovalence salt ion.
In the purification and separation method of above-mentioned high-salt wastewater, preferably, monovalence salt ion includes in the high-salt wastewater
Sodium ion and chlorion.Because the presence of sodium ion and the monovalent salt of chlorion makes waste water have larger corrosivity, therefore, lead to
Cross after isolating monovalent salt ion, corrosivity phenomenon caused by can effectively solving to exist because of monovalent salt.
In the purification and separation method of above-mentioned high-salt wastewater, preferably, divalence salt ion includes in the high-salt wastewater
One or more in calcium ion, magnesium ion and sulfate ion.These divalent salts are common ions in high-salt wastewater, with
The increase for its concentration is readily formed scale formation, therefore, after being processed by the method for the present invention, in can making waste water
Water will not be concentrated and increase its concentration, so as to realize effectively preventing the effect of scale formation.Meanwhile, by removal one
After valency salt ion, lime etc. need to be only added simply to process in high-salt wastewater, it becomes possible to which making to give up reaches discharge standard, very greatly
The processing procedure of waste water is simplified in degree.
In the purification and separation method of above-mentioned high-salt wastewater, preferably, the NF membrane is selected from board-like or tubular type nanofiltration
Film.It is easy for installation, and can preferably realize removing the effect of monovalence salt ion.As further preferred, the nanofiltration
Film is selected from board-like or tubular nanofiltration membrane.The dual property for permeating and retaining can be more selectively realized, makes monovalence salt ion
NF membrane can more effectively be penetrated；Meanwhile, divalence salt ion can also be effectively accomplished cutoff performance, and it is right to make to be more beneficial for
The purification separation purpose of high-salt wastewater.
In the purification and separation method of above-mentioned high-salt wastewater, preferably, the pressure of the high-salt wastewater side is 1.0MPa
~1.5MPa.Equivalent to the flow speed that can further adjust high-salt wastewater, make the monovalence salt ion being more beneficial in waste water
Pure water is diffused into, more efficient purification separation effect is realized.
In the purification and separation method of above-mentioned high-salt wastewater, preferably, the effluent of NF membrane one in the nanofiltration equipment
Flow direction through high-salt wastewater is opposite with the flow direction that the NF membrane opposite side in the nanofiltration equipment flows through pure water.Given up by making high salt
The flow direction of water is with the flow direction of pure water conversely, equivalent to making them form cross-flow, making the osmotic pressure of NF membrane both sides identical, thus
Can be good at reaching the dilutional hyponatremia prevented in pure water penetrates into high-salt wastewater, and effective purification separation can be made to go out height again
Monovalence salt ion in salt waste water.
The second object of the present invention technical scheme is that, a kind of receiving for high-salt wastewater nanofiltration
Filter equipment, an including inside has the housing of inner chamber, and NF membrane is provided with the housing, and the housing is provided with the He of water inlet one
Discharge outlet two, it is characterised in that the side of the NF membrane is high-salt wastewater side for flow through high-salt wastewater；The NF membrane
Opposite side be used for that flow through pure water to be pure water side；The water inlet one is connected with high-salt wastewater side；The discharge outlet two with
Pure water side is connected；The housing is provided with the discharge outlet one being connected with high-salt wastewater side；The housing is provided with and pure water
The water inlet two that side is connected.
This equipment by increasing water inlet two and discharge outlet two, meanwhile, make to be distributed with water inlet in the both sides of NF membrane
And discharge outlet, so as to realize that there are the design requirements of two water channel passages, high-salt wastewater is carried out when nanofiltration is processed just can be with
High-salt wastewater and pure water are passed through in the both sides of NF membrane respectively, making need not be by the direct press filtration of high-salt wastewater during nanofiltration has
NF membrane, makes it only be flowed through in the homonymy of NF membrane, and due to being passed through pure water in the opposite side of NF membrane, thus
During the monovalent salt in high-salt wastewater can be made to penetrate into pure water, and divalent salts are trapped in waste water, meanwhile, in the process for using
As long as in make the pressure of high-salt wastewater side more than the pressure of pure water side, the both sides of NF membrane is formd certain pressure
Difference, so as to can also overcome because salinity is differently formed osmotic pressure, in the water of pure water side is not penetrated into high-salt wastewater, also
Wastewater flow rate can be kept will not be increased, and allowed to realize reducing monovalence salt ion and prevented the performance of fouling.
In the above-mentioned nanofiltration equipment for high-salt wastewater nanofiltration, used as a kind of implementation method, the housing is cylindrical in shape knot
Structure, the water inlet one is located at the left end of housing, and the discharge outlet two is located at the right-hand member of housing；The water inlet two is located at housing
Lower wall, the discharge outlet two be located at housing upper side wall；The nano filtration construction includes dividing plate one and dividing plate two, the dividing plate
One left side for being located at housing, the circumference of the dividing plate one is brought into close contact and can form sealing with the madial wall of housing；It is described every
Plate two is located at the right side of housing, and the circumference of the dividing plate two is brought into close contact and can form sealing with the madial wall of housing；It is described
Some NF membranes in a tubular form are provided between dividing plate one and dividing plate two；The dividing plate one is provided with and tubulose NF membrane with dividing plate two
In one-to-one through hole, the NF membrane is connected by the through hole on dividing plate one and dividing plate two with water inlet one and discharge outlet one
It is logical；The water inlet two is connected with discharge outlet two.By using tubulose NF membrane, as long as make when in use high-salt wastewater from
Flowed through in the pipe of tubulose NF membrane；And pure water flows through from pipe is outer, thus equivalent to making high-salt wastewater and pure water respectively from nanofiltration
The both sides of film flow through, and in can be good at for monovalent salt in high-salt wastewater penetrating into pure water, reach removal or reduce monovalent salt
The purpose of concentration, and the equipment simple structure, it is easy to design and actual production.
In the above-mentioned nanofiltration equipment for high-salt wastewater nanofiltration, used as another embodiment, the housing includes pressure
Plate one and pressing plate two, the pressing plate one are provided with water inlet one and discharge outlet two, and the pressing plate two is provided with water inlet two and row
The mouth of a river one；The water inlet one is located at the top of water inlet two, and the discharge outlet two is located at the top of discharge outlet one；The pressing plate
Nano filtration construction is provided between one and pressing plate two, the nano filtration construction is alternately arranged setting by some filters and board-like NF membrane；
The NF membrane is plate-like, and the filter forms sealing with nanofiltration contact position.Can be effective by the board-like NF membrane of use
Increase high-salt wastewater and pure water in the contact surface of NF membrane both sides, make permeable face bigger, be conducive to the removal for improving monovalent salt to imitate
Really；And the structure can be advantageously ensured that with more preferable bearing capacity, make to advantageously ensure that the pressure for improving NF membrane both sides
Difference demand, improves nanofiltration performance.
In sum, the present invention compared with prior art, with advantages below：
1. the purification and separation method of this high-salt wastewater, by making high-salt wastewater and pure water respectively from the nanofiltration in nanofiltration equipment
Film both sides flow through NF membrane and carry out nanofiltration, using the concentration difference formed between high-salt wastewater and pure water, so that in high-salt wastewater
Monovalent salt can be diffused into pure water by NF membrane in the presence of chemical energy, monovalence salinity reaches in making high-salt wastewater
Reduce or purification separation effect, effectively solve in high-salt wastewater and the presence of monovalent salt and the corrosion impact that is formed.
2. the purification and separation method of this high-salt wastewater, while being more than pure water side by making the pressure of the useless side of the high salt of NF membrane
Pressure, using formed pressure differential come overcome because between high-salt wastewater and pure water salinity difference formed osmotic pressure, reach
Having reduction or prevention pure water concurrently will not be diffused into high-salt wastewater by NF membrane, reach the overall wastewater flow rate for ensureing high-salt wastewater
Increased will not act on.
3. for the nanofiltration equipment of high-salt wastewater nanofiltration, by increasing by one group of water inlet two and discharge outlet on housing
Two, allowing to be passed through pure water in addition carries out nanofiltration, so as to realize both reaching removal or reduce the performance of monovalent salt, is prevented from again
The discharge reduction of high-salt wastewater or increase, make the performance for being not in scale formation or increase wastewater flow rate.
Brief description of the drawings
Fig. 1 is the process flow diagram that high-salt wastewater of the prior art carries out purification separation using nanofiltration equipment.
Fig. 2 is the process flow diagram of the purification and separation method of this high-salt wastewater.
Fig. 3 is the structural representation of the nanofiltration equipment that book is used for high-salt wastewater nanofiltration.
Fig. 4 is this one of which concrete structure schematic diagram for the nanofiltration equipment of high-salt wastewater nanofiltration.
Fig. 5 is the structural representation of Fig. 3 median septums one and dividing plate two.
Fig. 6 is that this sudden and violent of nanofiltration equipment another kind concrete structure for being used for high-salt wastewater nanofiltration fries structural representation.
Fig. 7 is the structural representation of filter in Fig. 6.
Fig. 8 is the structural representation of board-like NF membrane in Fig. 6.
Fig. 9 be in Fig. 6 A-A to diagonal cross section structure diagram.
Figure 10 is the diagonal cross section structure diagram of B-B direction in Fig. 6.
In figure, 1, housing；11st, water inlet one；12nd, water inlet two；13rd, discharge outlet two；14th, discharge outlet one；15th, pressing plate
One；16th, pressing plate two；2nd, nano filtration construction；21st, NF membrane；22nd, dividing plate one；23rd, dividing plate two；24th, filter；3rd, water pump one；4th, water pump
Two；5th, water pump three.
Specific embodiment
Below by specific embodiment, technical scheme is described in further detail, but the present invention is simultaneously
It is not limited to these embodiments.
As shown in Fig. 2 include that an inside has the housing 1 of inner chamber for the nanofiltration equipment of high-salt wastewater nanofiltration, in housing 1
NF membrane 21 is provided with, housing 1 is provided with water inlet 1 and discharge outlet 2 13, and the side of NF membrane 21 is used to flow through high-salt wastewater
Be high-salt wastewater side；The opposite side of NF membrane 21 is pure water side for flow through pure water；Equivalent to by the nanofiltration in housing
Film 21 is divided into two parts inner chamber, forms two inner chambers respectively in the both sides of NF membrane 21, i.e., one of inner chamber is used for
The high-salt wastewater side of high-salt wastewater formation is flowed through, another inner chamber is then used to flow through the pure water side of pure water formation, wherein, make into water
Mouth 1 is connected with high-salt wastewater side；Discharge outlet 2 13 is set to be connected with pure water side；It is additionally provided with housing 1 and high-salt wastewater side
The discharge outlet 1 being connected；Housing 1 is provided with the water inlet 2 12 being connected with pure water side.This makes it possible to make in nanofiltration
During respectively from the both sides of NF membrane 21 simultaneously be passed through high-salt wastewater and pure water, reach nanofiltration removal or reduce high-salt wastewater in
Monovalent salt performance, meanwhile, having had concurrently again prevents the performance of fouling.
In particular, as shown in figs 2-4, housing therein 1 can be received using being cylindrical in shape to be provided with structure, housing 1
Filter structure 2, wherein, water inlet 1 is located at the left end of housing 1, and discharge outlet 1 is located at the right-hand member of housing 1；Water inlet 2 12
In the lower wall of housing 1, discharge outlet 2 13 is located at the upper side wall of housing 1；Wherein, nano filtration construction 2 includes dividing plate 1 and dividing plate
2 23, dividing plate 1 is located at the left side of housing 1, and the circumference of dividing plate 1 is brought into close contact with the madial wall of housing 1 and can be formed
Sealing；Can such as be sealed simply by fluid sealant, it is also possible to set sealing structure to be sealed, sealing is only conventional
Processing mode；Wherein, dividing plate 2 23 is located at the right side of housing 1, and circumference and the madial wall of housing 1 of dividing plate 2 23 are brought into close contact
And sealing can be formed；Some NF membranes 21 in a tubular form are provided between dividing plate 1 and dividing plate 2 23；Dividing plate 1 and dividing plate
2 23 are provided with the NF membrane 21 with tubulose in one-to-one through hole, and the NF membrane 21 passes through dividing plate 1 and dividing plate 2 23
On through hole be connected with water inlet 1 and discharge outlet 1；Water inlet 2 12 is connected 13 with discharge outlet two.Also just quite
In on the side wall of housing 1 for making water inlet 2 12 and discharge outlet 2 13 be located between dividing plate 1 and dividing plate 2 23, and dividing plate 1
It is equivalent to for the inner chamber of housing 1 to be again divided into two parts with dividing plate 2 23, is formd equivalent in the both sides of NF membrane 21
Two cavitys, when using, can equally make one of cavity form high-salt wastewater side for flowing through high-salt wastewater, and another
One cavity forms pure water side for flowing through pure water, when high-salt wastewater and pure water is flowed through 21 both sides of NF membrane of tubulose, i.e.,
In the inner side and outer side of the NF membrane 21 of tubulose.Can be made with more preferable pressure-bearing property by the NF membrane using many tubuloses
Can, be conducive to improving the removal ability and the phenomenon for preventing fouling to monovalence salt ion.
As another embodiment, as shown in fig. 5-10, wherein the housing 1 includes pressing plate 1 and pressing plate two
16, pressing plate 1 is provided with water inlet 1 and discharge outlet 2 13, and pressing plate 2 16 is provided with water inlet 2 12 and discharge outlet 1；
Water inlet 1 is located at the top of water inlet 2 12, and the discharge outlet 2 13 is located at the top of discharge outlet 1；The pressing plate one
Nano filtration construction 2 is provided between 15 and pressing plate 2 16, the nano filtration construction 2 is alternately arranged by some filters 24 and board-like NF membrane 21
Row are set.So, it is equivalent to that between the NF membrane 21 for making adjacent two board-like certain inner chamber can be formed, so that high
Salt waste water and pure water can more fully reach osmotic effect when the both sides of NF membrane 21 are flowed through；And pressing plate 1 and pressing plate two
16 with the abutting contact of filter 24 after can form sealing, such as can be by injection moulding.Meanwhile, by using the He of filter 24
NF membrane 21 is arranged alternately can improve bearing capacity, be improved from dual angle to the removal ability of monovalence salt ion and anti-
The only generation of scale formation.In particular, through hole is offered at the corner that filter 24 and board-like NF membrane 21 can be made, from
And make have a through hole on four angles of each filter 24 and NF membrane 21, can be used for (the high-salt wastewater or pure water) stream that supplies water
It is logical, and through hole open up position respectively with water inlet 1 and the water of water inlet 2 12 and discharge outlet 1 and discharge outlet 2 13
Square to consistent, meanwhile, enable the one of which on filter 24 it is diagonal on through hole and two NF membranes 21 and filter 24
Between the cavity that is formed be connected, and another group on same filter 24 it is diagonal on through hole not with two NF membranes 21 and filter
The cavity formed between 24 is connected, logical on two groups on two filters 24 of the both sides of same NF membrane 21 are diagonal during installation
Hole is arranged alternately composition, you can realization makes water inlet 1 be connected with discharge outlet 1, and makes water inlet 2 12 and arrange
The mouth of a river 2 13 is connected.As shown in figure 9, water inlet 1 can be with phase by through hole on the 1st, 3, the filter 24 of 5 odd positions
The cavity formed between two NF membranes 21 answered is connected, then by the respective through hole on diagonal position and the phase of discharge outlet 1
Connection；Equally, as shown in Figure 10, through hole can be with corresponding two on the filter 24 that water inlet 2 12 passes through the 2nd, 4 even number positions
The cavity formed between individual NF membrane 21 is connected, then is connected with discharge outlet 2 13 by the respective through hole on diagonal position.
Or as shown in fig. 7, one group therein diagonally upper tool through hole jaggy can be connected with internal cavity, i.e. the lower left corner
With the diagonal lead to the hole site in the upper right corner, and another group is then not communicated with.This makes it possible to realize making high-salt wastewater and pure water exist respectively
The both sides of NF membrane 21 are flowed through, and realize effectively removal monovalent salt and prevent the performance of fouling, ensure that the amount of waste water will not again
Increase.
The high-salt wastewater used in following examples and comparative example is processed for the purification separation of certain power plant desulfurization waste water,
And in the high-salt wastewater corresponding monovalent salt and divalence salt ion initial content situation it is as follows：Na in the high-salt wastewater+Concentration
It is 5568mg/L；Ca2+Concentration be 1678.95mg/L；Mg2+Concentration be 2509.95mg/L；Cl-Concentration be
10447.50mg/L；SO4 2+Concentration be 11893.78mg/L.
Embodiment 1
As shown in Fig. 2 high-salt wastewater is transported into nanofiltration equipment using water pump 1, meanwhile, by water pump 24 by pure water
Nanofiltration equipment is delivered to, and high-salt wastewater and pure water is flowed through NF membrane 21 from the both sides of NF membrane 21 in nanofiltration equipment respectively again
Nanofiltration is carried out, wherein, NF membrane 21 can use Tao Shi NF membranes；In order to better illustrate, equivalent in making nanofiltration equipment
What the side of NF membrane 21 flowed through high-salt wastewater is high-salt wastewater side；What the opposite side of NF membrane 21 in nanofiltration equipment flowed through pure water is
Pure water side, further equivalent to charging aperture and discharging opening is offered in the nanofiltration equipment for making the both sides of NF membrane 21, that is, intakes
Mouth one 11, discharge outlet 1, water inlet 2 12 and discharge outlet 2 13.Thus make high-salt wastewater NF membrane 21 from nanofiltration equipment
High-salt wastewater side charging aperture flow into and high-salt wastewater side discharging opening discharge；Meanwhile, make pure water nanofiltration from nanofiltration equipment
The charging aperture of the pure water side of film 21 is flowed into, and is discharged from the discharging opening of pure water side；Wherein, the stream of the side high-salt wastewater of NF membrane 21
Move the flow direction in direction and the opposite side pure water of NF membrane 21 conversely, making that cross-flow can be formed between the two, in particular, such as
Shown in Fig. 2 and Fig. 3, high-salt wastewater is set to be flowed out from discharge outlet 1 after high-salt wastewater side is flowed through from after the entrance of water inlet 1, and
Pure water flows out after pure water side is flowed through from after the entrance of water inlet 2 12 from discharge outlet 2 13；Then, by adjusting water pump 1 and water pump
23 Yang Cheng, makes the pressure of the high-salt wastewater side of NF membrane 21 in nanofiltration equipment more than the pressure of pure water side, equivalent to making high salt
The discharge pressure of waste water thus makes the both sides of NF membrane 21 form pressure differential more than the discharge pressure of pure water, preferably makes height
The pressure of salt waste water side is 1.0MPa；Make the pressure of pure water side for 0.5MPa, i.e., equivalent to being more than the pressure of high-salt wastewater side
The pressure differential of the pressure initiation of pure water side is 0.5MPa, and NF membrane 21 is flowed through in the way of cross-flow simultaneously in high-salt wastewater and pure water
Afterwards, both and are made to flow through NF membrane 21 with certain flow velocity under the effect of the pressure, and without making high-salt wastewater in the work of pressure
With lower by NF membrane 21, so that the monovalent salt ion permeable NF membrane in high-salt wastewater is diffused into pure water, reach to height
Salt waste water carries out purification separation, by above-mentioned by that after nanofiltration purification separation, the high salt of monovalence salt ion can will be eliminated respectively
In discharge of wastewater to storage tank or directly adding lime into next process by pipeline carries out further removing two valencys
Salt；And the pure water for having permeated monovalence salt ion can also be emitted into storage tank or be directly entered next process and directly be concentrated
Further purify desalination.After actually used, scale formation is not found in the high-salt wastewater side of NF membrane 21, and also can
Realize to monovalence salt ion Na very well+And Cl-Purification separation.
By using the method for the present invention high-salt wastewater is carried out after nanofiltration treatment to the monovalent salt in high-salt wastewater from
Sub- content is analyzed, and as a result shows Na+Concentration be down to 835.2mg/L, Na+Removal efficiency reach 85%；Cl-Concentration drop
To 2089.5mg/L.Cl-Removal efficiency reach 80%；Ca2+Concentration be 1665.95mg/L；Mg2+Concentration be
2502.95mg/L；SO4 2+Concentration be 11888.78mg/L.From the results, it was seen that the method for the present invention can be good at
Except monovalence salt ion, can effectively prevent the water in high-salt wastewater from concentrating or increasing again, solve well because of water concentration
Caused scale formation, also will not make wastewater flow rate increased phenomenon occur because of the osmotic pressure that salinity difference is formed.
Embodiment 2
As shown in Fig. 2 high-salt wastewater is transported into nanofiltration equipment using water pump 1, meanwhile, by water pump 24 by pure water
Nanofiltration equipment is delivered to, and high-salt wastewater and pure water is flowed through NF membrane 21 from the both sides of NF membrane 21 in nanofiltration equipment respectively again
Nanofiltration is carried out, wherein, NF membrane 21 can use Tao Shi NF membranes；In order to better illustrate, equivalent in making nanofiltration equipment
What the side of NF membrane 21 flowed through high-salt wastewater is high-salt wastewater side；What the opposite side of NF membrane 21 in nanofiltration equipment flowed through pure water is
Pure water side, further equivalent to charging aperture and discharging opening is offered in the nanofiltration equipment for making the both sides of NF membrane 21, that is, intakes
Mouth one 11, discharge outlet 1, water inlet 2 12 and discharge outlet 2 13.Thus make high-salt wastewater NF membrane 21 from nanofiltration equipment
High-salt wastewater side charging aperture flow into and high-salt wastewater side discharging opening discharge；Meanwhile, make pure water nanofiltration from nanofiltration equipment
The charging aperture of the pure water side of film 21 is flowed into, and is discharged from the discharging opening of pure water side；Wherein, the stream of the side high-salt wastewater of NF membrane 21
Move the flow direction in direction and the opposite side pure water of NF membrane 21 conversely, making that cross-flow can be formed between the two, in particular, such as
Shown in Fig. 2 and Fig. 3, high-salt wastewater is set to be flowed out from discharge outlet 1 after high-salt wastewater side is flowed through from after the entrance of water inlet 1, and
Pure water flows out after pure water side is flowed through from after the entrance of water inlet 2 12 from discharge outlet 2 13；Then, by adjusting water pump 1 and water pump
23 Yang Cheng, makes the pressure of the high-salt wastewater side of NF membrane 21 in nanofiltration equipment more than the pressure of pure water side, equivalent to making high salt
The discharge pressure of waste water thus makes the both sides of NF membrane 21 form pressure differential more than the discharge pressure of pure water, preferably makes height
The pressure of salt waste water side is 1.5MPa；Make the pressure of pure water side for 0.7MPa, i.e., equivalent to being more than the pressure of high-salt wastewater side
The pressure differential of the pressure initiation of pure water side is 0.8MPa, and NF membrane 21 is flowed through in the way of cross-flow simultaneously in high-salt wastewater and pure water
Afterwards, both and are made to flow through NF membrane 21 with certain flow velocity under the effect of the pressure, and without making high-salt wastewater in the work of pressure
With lower by NF membrane 21, so that the monovalent salt ion permeable NF membrane in high-salt wastewater is diffused into pure water, reach to height
Salt waste water carries out purification separation, by above-mentioned by that after nanofiltration purification separation, the high salt of monovalence salt ion can will be eliminated respectively
Waste water adds lime and is further removed divalent salt；And the pure water for having permeated monovalence salt ion can directly carry out concentrating into
One step purifies desalination.After actually used, scale formation is not found in the high-salt wastewater side of NF membrane 21, and also can be very
Realize to monovalence salt ion Na well+And Cl-Purification separation.
By using the method for the present invention high-salt wastewater is carried out after nanofiltration treatment to the monovalent salt in high-salt wastewater from
Sub- content is analyzed, and as a result shows Na+Concentration be down to 556.8mg/L, Na+Removal efficiency reach 90%；Cl-Concentration drop
To 1880.55mg/L.Cl-Removal efficiency reach 82%；Ca2+Concentration be 1675.95mg/L；Mg2+Concentration be
2504.83mg/L；SO4 2+Concentration be 11890.71mg/L.From the results, it was seen that the method for the present invention can be good at
Except monovalence salt ion, can effectively prevent the water in high-salt wastewater from concentrating or increasing again, solve well because of water concentration
Caused scale formation, also will not make wastewater flow rate increased phenomenon occur because of the osmotic pressure that salinity difference is formed.
Embodiment 3
The present embodiment is consistent with embodiment 1 to the specific purification and separation method of high-salt wastewater, repeats no more here, and difference is only
It is that the pressure for making high-salt wastewater side in nanofiltration equipment 11 therein is 1.2MPa；The pressure for making pure water side is 0.6MPa, i.e. phase
When the pressure differential in the pressure initiation for making the pressure of high-salt wastewater side be more than pure water side is 0.6MPa.
Equally, high-salt wastewater is carried out after nanofiltration treatment to the monovalence in high-salt wastewater by using the method for the present invention
Salt ion content is analyzed, and as a result shows Na+Removal efficiency reach 86%；Cl-Removal efficiency reach 83%；Ca2+It is dense
It is 1677.54mg/L to spend；Mg2+Concentration be 2506.53mg/L；SO4 2+Concentration be 11891.52mg/L.Can from result
Go out, the method for the present invention can be good at removing monovalence salt ion, can effectively prevent again water in high-salt wastewater concentrate or
Increase, solve well because of scale formation caused by water concentration, also will not make to give up because of the osmotic pressure that salinity difference is formed
There is increased phenomenon in water.
Embodiment 4
The present embodiment is consistent with embodiment 1 to the specific purification and separation method of high-salt wastewater, repeats no more here, and difference is only
It is that the pressure for making high-salt wastewater side in nanofiltration equipment 11 therein is 1.3MPa；The pressure for making pure water side is 0.8MPa, i.e. phase
When the pressure differential in the pressure initiation for making the pressure of high-salt wastewater side be more than pure water side is 0.5MPa；Wherein, NF membrane 21 can be with
Using board-like NF membrane, it would however also be possible to employ tubular nanofiltration membrane, but, also pipe is only being purified using the NF membrane 21 of which kind of form
High-salt wastewater and pure water is flowed through from the both sides of NF membrane 21 respectively in separation process and be capable of achieving corresponding effect.Such as using pipe
During formula NF membrane, high-salt wastewater can be made to be flowed through from the pipe of tubular nanofiltration membrane；And pure water is outflowed from the pipe of tubular nanofiltration membrane
Cross, and make anti-formation in the flow direction of high-salt wastewater and the flow direction of pure water wrong.It is of course also possible to both positions are conversely, i.e. suitable
Flowed through from the pipe of tubular nanofiltration membrane in pure water is made；And high-salt wastewater is flowed through from outside the pipe of tubular nanofiltration membrane equally can be real
It is existing.
Equally, high-salt wastewater is carried out after nanofiltration treatment to the monovalence in high-salt wastewater by using the method for the present invention
Salt ion content is analyzed, and as a result shows Na+Removal efficiency reach 87%；Cl-Removal efficiency reach 82%；Ca2+It is dense
It is 1675.34mg/L to spend；Mg2+Concentration be 2503.73mg/L；SO4 2+Concentration be 11890.44mg/L.Can from result
Go out, the method for the present invention can be good at removing monovalence salt ion, can effectively prevent again water in high-salt wastewater concentrate or
Increase, solve well because of scale formation caused by water concentration, also will not make to give up because of the osmotic pressure that salinity difference is formed
There is increased phenomenon in water.
Embodiment 5
As shown in Figure 2-5, high-salt wastewater is transported to nanofiltration equipment using water pump 1, meanwhile, will be pure by water pump 24
Water is delivered to nanofiltration equipment, and high-salt wastewater and pure water is flowed through NF membrane from the both sides of NF membrane 21 in nanofiltration equipment respectively again
21 carry out nanofiltration, wherein, NF membrane 21 can use Tao Shi NF membranes；In order to better illustrate, equivalent in making nanofiltration equipment
The side of NF membrane 21 flows through high-salt wastewater is high-salt wastewater side；The opposite side of NF membrane 21 in nanofiltration equipment flows through pure water
It is pure water side, wherein, the flow direction of the side high-salt wastewater of NF membrane 21 and the flow direction phase of the opposite side pure water of NF membrane 21
Instead, make that cross-flow can be formed between the two.In particular, as shown in figure 4, making high-salt wastewater lead to from after the entrance of water inlet 1
The through hole crossed on dividing plate 1 flows through in the pipe of tubulose NF membrane 21 (equivalent to high-salt wastewater side is flowed through), then by dividing plate 2 23
Flowed out from discharge outlet 1 after the upper through hole corresponding with NF membrane 21；And from pipe after the pure water entrance of water inlet 2 12 from below
Flowed out from the discharge outlet 2 13 of top after flowing through (equivalent to pure water side is flowed through) in the pipe outside of the NF membrane 21 of shape；Then, pass through
The Yang Cheng of adjustment water pump 1 and water pump 23, makes the pressure of the high-salt wastewater side of NF membrane 21 in nanofiltration equipment more than the pressure of pure water side
Power, equivalent to making the discharge pressure of high-salt wastewater more than the discharge pressure of pure water, thus forms the both sides of NF membrane 21
Pressure differential, the pressure for preferably making high-salt wastewater side is 1.0MPa；Make the pressure of pure water side for 0.5MPa, i.e., it is useless equivalent to high salt is made
The pressure of water side is 0.5MPa more than the pressure differential of the pressure initiation of pure water side, in high-salt wastewater and pure water simultaneously with the side of cross-flow
After formula flows through NF membrane 21, and both are made to flow through NF membrane 21 with certain flow velocity under the effect of the pressure, and without making high salt
Waste water under the effect of the pressure by NF membrane 21 so that the monovalent salt ion permeable NF membrane in high-salt wastewater be diffused into it is pure
In water, reach carries out purification separation to high-salt wastewater, by above-mentioned by that after nanofiltration purification separation, can will eliminate monovalence respectively
The high-salt wastewater of salt ion is emitted into storage tank or directly adding lime into next process by pipeline enters traveling one
The removing divalent salt of step；And the pure water for having permeated monovalence salt ion can also be emitted into storage tank or be directly entered next process
Directly carry out concentrating further purification desalination.After actually used, fouling is not found in the high-salt wastewater side of NF membrane 21
Phenomenon, and can also realize very well to monovalence salt ion Na+And Cl-Purification separation.
By using the method for the present invention high-salt wastewater is carried out after nanofiltration treatment to the monovalent salt in high-salt wastewater from
Sub- content is analyzed, and as a result shows Na+Removal efficiency reach 88%；Cl-Removal efficiency reach 85%；Ca2+Concentration be
1664.95mg/L；Mg2+Concentration be 2501.95mg/L；SO4 2+Concentration be 11885.78mg/L.From the results, it was seen that this
The method of invention can be good at removing monovalence salt ion, can effectively prevent the water in high-salt wastewater from concentrating or increasing again,
Solve well because of scale formation caused by water concentration, also will not measure waste water because of the osmotic pressure that salinity difference is formed
Existing increased phenomenon.
Embodiment 6
As shown in Fig. 6-Figure 10, high-salt wastewater is transported to nanofiltration equipment using water pump 1, meanwhile, will by water pump 24
Pure water is delivered to nanofiltration equipment, and high-salt wastewater and pure water is flowed through nanofiltration from the both sides of NF membrane 21 in nanofiltration equipment respectively again
Film 21 carries out nanofiltration, wherein, NF membrane 21 can use Tao Shi NF membranes；In order to better illustrate, equivalent to making nanofiltration equipment
In the side of NF membrane 21 flows through high-salt wastewater is high-salt wastewater side；The opposite side of NF membrane 21 in nanofiltration equipment flows through pure water
Be pure water side, wherein, the flow direction of the side high-salt wastewater of NF membrane 21 and the flow direction of the opposite side pure water of NF membrane 21
Conversely, making that cross-flow can be formed between the two.In particular, as shown in Fig. 6 and Fig. 9 and Figure 10, high-salt wastewater from pressing plate is made
The water inlet 1 of one 15 tops (gives up after the cavity formed at the filter 24 of odd positions is flowed through after entering equivalent to high salt is flowed through
Water side) flowed out from the lower section discharge outlet 1 of pressing plate 2 16；And pure water flows after entering from the lower section water inlet 2 12 of pressing plate 2 16
From the top discharge outlet 2 13 of pressing plate 1 after cavity (equivalent to pure water side is flowed through) through being formed at the filter 24 of even number position
Outflow；Then, by adjusting the Yang Cheng of water pump 1 and water pump 23, the pressure of the high-salt wastewater side of NF membrane 21 in nanofiltration equipment is made
More than the pressure of pure water side, equivalent to making the discharge pressure of high-salt wastewater more than the discharge pressure of pure water, thus make NF membrane
21 both sides form pressure differential, and the pressure for preferably making high-salt wastewater side is 1.2MPa；Make the pressure of pure water side for 0.6MPa, i.e.,
Equivalent to making the pressure of high-salt wastewater side be 0.6MPa more than the pressure differential of the pressure initiation of pure water side, in high-salt wastewater and pure water
After NF membrane 21 is flowed through in the way of cross-flow simultaneously, and both are made to flow through NF membrane with certain flow velocity under the effect of the pressure
21, and without making high-salt wastewater under the effect of the pressure by NF membrane 21, so that the monovalence salt ion in high-salt wastewater is saturating
Cross NF membrane to be diffused into pure water, reach carries out purification separation to high-salt wastewater, by above-mentioned by after nanofiltration purification separation, can be with
To eliminate respectively monovalence salt ion high-salt wastewater be emitted into storage tank or directly by pipeline enter next process again
Lime is added further to be removed divalent salt；And the pure water for having permeated monovalence salt ion can also be emitted into storage tank or straight
To tap into directly carried out into next process and concentrate further purification desalination.After actually used, in the high-salt wastewater of NF membrane 21
Side has not found scale formation, and can also realize very well to monovalence salt ion Na+And Cl-Purification separation.
By using the method for the present invention high-salt wastewater is carried out after nanofiltration treatment to the monovalent salt in high-salt wastewater from
Sub- content is analyzed, and as a result shows Na+Removal efficiency reach 89%；Cl-Removal efficiency reach 85%；Ca2+Concentration be
1666.95mg/L；Mg2+Concentration be 2502.55mg/L；SO4 2+Concentration be 11884.78mg/L.From the results, it was seen that this
The method of invention can be good at removing monovalence salt ion, can effectively prevent the water in high-salt wastewater from concentrating or increasing again,
Solve well because of scale formation caused by water concentration, also will not measure waste water because of the osmotic pressure that salinity difference is formed
Existing increased phenomenon.
Comparative example 1
As shown in figure 1, high-salt wastewater being transported into nanofiltration equipment using water pump 35 and making high-salt wastewater again in water pump 35
Discharge pressure effect under from the NF membrane 21 in nanofiltration equipment by carrying out nanofiltration, wherein, NF membrane 21 can use Tao Shi
NF membrane；Equivalent to, high-salt wastewater is entered from the side of NF membrane 21, and discharged from the opposite side of NF membrane 21, Ke Yitong
The Yang Cheng of adjustment water pump 35 is crossed, makes the pressure of high-salt wastewater side for 1.0MPa, realize the purification separation to high-salt wastewater.
The monovalence salt ion content in high-salt wastewater is analyzed after being processed by the method using comparative example 1, is tied
Fruit shows Na+Removal efficiency reach 50%；Cl-Removal efficiency reach 42%；And the water in high-salt wastewater is oozed due to a part
Having passed through NF membrane 21 makes overall discharge reduction half or so, is also equivalent to method of the prior art by nanofiltration
The concentration of divalence salt ion increases after reason, also easily occurs in that scale formation.
Specific embodiment described in the present invention is only to the spiritual explanation for example of the present invention.Technology neck belonging to of the invention
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be replaced using similar mode
Generation, but without departing from spirit of the invention or surmount scope defined in appended claims.
It is skilled to this area although having made a detailed description and being cited some specific embodiments to the present invention
For technical staff, as long as it is obvious that can be made various changes without departing from the spirit and scope of the present invention or corrected.
Claims (10)
1. a kind of purification and separation method of high-salt wastewater, it is characterised in that the method is comprised the following steps：
A, high-salt wastewater is transported to by nanofiltration equipment by water pump one (3)；Pure water is delivered into nanofiltration by water pump two (4) to set
It is standby, then make high-salt wastewater and pure water flow through NF membrane (21) from NF membrane (21) both sides in nanofiltration equipment respectively to carry out nanofiltration；
What NF membrane (21) side in the nanofiltration equipment flowed through high-salt wastewater is high-salt wastewater side；Nanofiltration in the nanofiltration equipment
What film (21) opposite side flowed through pure water is pure water side；The high-salt wastewater is flowed into and arranged from the high-salt wastewater side in nanofiltration equipment
Go out；Pure water pure water side from nanofiltration equipment flows into and discharges；
B, the Yang Cheng by adjusting water pump one (3) and water pump two (4), make the pressure of high-salt wastewater side in nanofiltration equipment be more than pure water
The pressure of side, makes the monovalence salt ion in high-salt wastewater permeate NF membrane (21) and is diffused into pure water, reaches and high-salt wastewater is entered
Row purification separation.
2. the purification and separation method of high-salt wastewater according to claim 1, it is characterised in that the pressure of the high-salt wastewater side
It is 0.5MPa~0.8MPa with the pressure differential of the pressure initiation of pure water side.
3. the purification and separation method of high-salt wastewater according to claim 1, it is characterised in that monovalent salt in the high-salt wastewater
Ion includes sodium ion and chlorion.
4. the purification and separation method of high-salt wastewater according to claim 1, it is characterised in that the NF membrane (21) is selected from plate
Formula or tubular nanofiltration membrane.
5. the purification and separation method of high-salt wastewater according to claim 1 or claim 2, it is characterised in that the NF membrane (21) is
Tao Shi nanofiltration diaphragms.
6. the purification and separation method of high-salt wastewater according to claim 1, it is characterised in that the pressure of the high-salt wastewater side
It is 1.0MPa~1.5MPa.
7. the purification and separation method of high-salt wastewater according to claim 1, it is characterised in that the nanofiltration in the nanofiltration equipment
NF membrane (21) opposite side that film (21) side is flowed through in the flow direction of high-salt wastewater and the nanofiltration equipment flows through the flow direction of pure water
Conversely.
8. a kind of nanofiltration equipment for high-salt wastewater nanofiltration, an including inside has the housing (1) of inner chamber, the housing (1)
NF membrane (21) is inside provided with, the housing (1) is provided with water inlet one (11) and discharge outlet two (13), it is characterised in that described
The side of NF membrane (21) is high-salt wastewater side for flow through high-salt wastewater；The opposite side of the NF membrane (21) is used to flow through
Pure water is pure water side；The water inlet one (11) is connected with high-salt wastewater side；The discharge outlet two (13) and pure water side phase
Connection；The housing (1) is provided with the discharge outlet one (14) being connected with high-salt wastewater side；The housing (1) be provided with it is pure
The water inlet two (12) that water side is connected.
9. the nanofiltration equipment of high-salt wastewater nanofiltration is used for according to claim 8, it is characterised in that the housing (1) is in cylinder
Shape structure, is provided with nano filtration construction (2) in the housing (1), the water inlet one (11) positioned at housing (1) left end, the row
Right-hand member of the mouth of a river one (14) positioned at housing (1)；The water inlet two (12) positioned at housing (1) lower wall, the discharge outlet two
(13) positioned at the upper side wall of housing (1)；The nano filtration construction (2) includes dividing plate one (22) and dividing plate two (23), the dividing plate one
(22) positioned at the left side of housing (1), the circumference of the dividing plate one (22) is brought into close contact and can be formed with the madial wall of housing (1)
Sealing；The dividing plate two (23) is positioned at the right side of housing (1), and the circumference of the dividing plate two (23) is tight with the madial wall of housing (1)
It is closely connected to close and sealing be formed；Some NF membranes in a tubular form are provided between the dividing plate one (22) and dividing plate two (23)
(21)；The dividing plate one (22) is provided with the NF membrane (21) with tubulose in one-to-one through hole with dividing plate two (23), described
NF membrane (21) is connected by the through hole on dividing plate one (22) and dividing plate two (23) with water inlet one (11) and discharge outlet one (14)
It is logical；The water inlet two (12) is connected (13) with discharge outlet two.
10. the nanofiltration equipment of high-salt wastewater nanofiltration is used for according to claim 8, it is characterised in that the housing (1) includes
Pressing plate one (15) and pressing plate two (16), the pressing plate one (15) are provided with water inlet one (11) and discharge outlet two (13), the pressure
Plate two (16) is provided with water inlet two (12) and discharge outlet one (14)；The water inlet one (11) is upper positioned at water inlet two (12)
Side, the discharge outlet two (13) is positioned at the top of discharge outlet one (14)；It is provided between the pressing plate one (15) and pressing plate two (16)
Nano filtration construction (2), the nano filtration construction (2) is alternately arranged setting by some filters (24) and NF membrane (21)；The NF membrane
(21) plate-like, the filter (24) forms sealing with NF membrane (21) contact position.
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| CN108862633A (en) * | 2018-08-10 | 2018-11-23 | 滨化集团股份有限公司 | A kind of method and complex microorganism preparations using complex microorganism preparations processing high-salt wastewater COD |
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|---|---|---|---|---|
| CN103191643A (en) * | 2013-04-25 | 2013-07-10 | 张翼鹏 | Nano filter (NF) with external heating self-service pipeline |
| CN103288252A (en) * | 2013-06-24 | 2013-09-11 | 北京赛科康仑环保科技有限公司 | A wastewater desalination process with a high water yielding rate and a device thereof |
| CN205061720U (en) * | 2015-09-09 | 2016-03-02 | 济宁市鲁泉水处理有限公司 | Receive and strain device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103191643A (en) * | 2013-04-25 | 2013-07-10 | 张翼鹏 | Nano filter (NF) with external heating self-service pipeline |
| CN103288252A (en) * | 2013-06-24 | 2013-09-11 | 北京赛科康仑环保科技有限公司 | A wastewater desalination process with a high water yielding rate and a device thereof |
| CN205061720U (en) * | 2015-09-09 | 2016-03-02 | 济宁市鲁泉水处理有限公司 | Receive and strain device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108862633A (en) * | 2018-08-10 | 2018-11-23 | 滨化集团股份有限公司 | A kind of method and complex microorganism preparations using complex microorganism preparations processing high-salt wastewater COD |
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