CN208700815U - A kind of high slat-containing wastewater zero-discharge treatment system - Google Patents
A kind of high slat-containing wastewater zero-discharge treatment system Download PDFInfo
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- CN208700815U CN208700815U CN201821280554.1U CN201821280554U CN208700815U CN 208700815 U CN208700815 U CN 208700815U CN 201821280554 U CN201821280554 U CN 201821280554U CN 208700815 U CN208700815 U CN 208700815U
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Abstract
The utility model discloses a kind of high slat-containing wastewater zero-discharge treatment systems, including pretreatment system, mesohigh reverse osmosis unit, ED ion-exchange membrane facility and vaporising device, wherein, pretreatment system includes carbon dioxide decalcification device, and carbon dioxide decalcification device is sequentially communicated pH adjustment tank, flocculation reaction tank, gravity inclined-plate clarifying basin to intermediate pool；Mesohigh reverse osmosis unit includes that ultrafiltration apparatus and mesohigh reverse osmosis unit are sequentially communicated with intermediate pool, mesohigh reverse osmosis unit is respectively communicated with fresh water tanks and level-one concentrated water slot, level-one concentrated water slot is connected to ED ion-exchange membrane facility, ED ion-exchange membrane facility is respectively communicated with second level concentrated water case and intermediate pool, second level concentrated water case is connected to vaporising device, and vaporising device connects crystal salt storage tank.This system uses carbon dioxide decalcification, can reduce the calcium ion in waste water, avoids the fouling after several times are concentrated in film surface of organic fouling and calcium ions and magnesium ions, and reverse osmosis unit membrane component is not susceptible to ion fouling and organic fouling.
Description
Technical field
The utility model belongs to field of industrial waste water treatment, at the especially a kind of decrement and zero-emission of industrial high-salt wastewater
Reason system.
Background technique
In recent years, with the development of production, industrial factories and miness pollution discharge diversity, complexity, on the other hand, environmentally friendly is wanted
That asks the situations such as is increasingly stringenter, is more urgent, and how these waste water containing complicated ingredient are disposed and received the problem of utilization wide
General attention.Especially in water resources shortage area, this effluent part how is made good use of, wastewater zero discharge is realized, further increases
The comprehensive utilization ratio of water resource alleviates water resource pressure and is of great significance.
Waste water zero-discharge technology generallys use membrane treatment process, almost molecular sieve.Membrane separation technique is current most advanced, most
Energy conservation, the highest isolation technics of efficiency.Its principle is under the pressure for being higher than solution osmotic pressure, by means of only allowing hydrone saturating
The selective retention for the reverse osmosis membrane crossed acts on, and the solute in solution is separated with solvent, to achieve the purpose that pure water.Reverse osmosis
It is extremely important that permeable membrane method processing technique has been increasingly becoming one of fields such as industrial circulation water treatment, sewage and waste water recycling
Processing method.
Reverse osmosis membrane develops comparative maturity for handling waste water aspect, but the technology is in the waste water of processes composition complexity
When there are the problem of also become increasingly conspicuous, main problem shows two aspects: first is that reverse-osmosis membrane element is to the recycling of waste water benefit
It can only achieve 75% or so with rate, still have 25% concentrated water that cannot utilize, need direct emission.So more concentrated waters directly utilize more
Effect is evaporated crystallization, then the quantity of steam consumed is big, and the processing cost of waste water is caused to increase.Second is that waste water usually high in salt is not
It can be directly entered RO membranous system, the osmotic pressure of the higher waste water of salt concentration is very high in other words, and organic pollutant and inorganic salts become
In saturation, fouling easily occurs in film surface, causes separating difficulty to increase, energy consumption increase, economy is bad, and reliability is lower.
To sum up, for the decrement and zero discharge treatment of complicated waste water with high salt, a kind of economical and generality processing is provided
Device becomes technical problem urgently to be resolved.
Utility model content
The purpose of this utility model is to provide a kind of zero-discharge treatment systems of high slat-containing wastewater, pass through the pre- place of waste water
Device, the combination of the evaporated crystallization device of the minimizing device and high-salt concentrated water of waste water are managed, waste water after processing is realized useless
The minimizing of water and the evaporative crystallization of high-salt concentrated water, to realize the zero-emission of waste water.
In order to achieve the above objectives, the embodiments of the present invention adopt the following technical scheme that
According to one embodiment provided by the utility model, the utility model is provided at a kind of high slat-containing wastewater zero-emission
Reason system, including pretreatment system, mesohigh reverse osmosis unit, ED ion-exchange membrane facility and vaporising device, wherein pretreatment system
Carbon dioxide decalcification device including being communicated with carbon dioxide gaseous state basin, carbon dioxide decalcification device are sequentially communicated pH adjustment
Slot, flocculation reaction tank, gravity inclined-plate clarifying basin to intermediate pool；Mesohigh reverse osmosis unit includes being sequentially communicated with intermediate pool
Ultrafiltration apparatus and mesohigh reverse osmosis unit, mesohigh reverse osmosis unit are connected to fresh water tanks all the way, and another way is connected to level-one
Concentrated water slot, level-one concentrated water slot are connected to ED ion-exchange membrane facility, and ED ion-exchange membrane facility is respectively communicated with second level concentrated water case and intermediate pool, and two
Grade concentrated water case is connected to vaporising device, and vaporising device connects crystal salt storage tank.
For above-mentioned technical proposal, there are also further preferred schemes for the utility model:
Preferably, be communicated on the carbon dioxide decalcification device high-salt wastewater water inlet pipe and carbon dioxide gaseous state basin into
Tracheae, high-salt wastewater water inlet pipe are equipped with inlet valve, and carbon dioxide gaseous state basin air inlet pipe is equipped with carbon dioxide valve.
Preferably, the carbon dioxide decalcification device is equipped with circulation line, and circulation line is equipped with circulating pump.
Preferably, blender is equipped in the pH adjustment tank and flocculation reaction tank.
Preferably, multiple rows of inclined plate is equipped in the middle part of the gravity inclined-plate clarifying basin, the lower part of pond body is biconial structure.
Preferably, the mesohigh reverse osmosis unit being connected with the ultrafiltration apparatus is at least two.
Preferably, NaOH has been added in the pH adjustment tank.
Preferably, the material of the mesohigh reverse osmosis unit membrane component is aromatic polyamide composite material, membrane component
Width of flow path be 1.65~2.05mm.
Preferably, the ED ion-exchange membrane facility includes partition, amberplex, electrode and clamping device, wherein if dry plate
It is isolated between amberplex by partition, the ionic membrane at both ends is respectively equipped with positive and negative anodes, and uses clamping device by ion
Film is fixedly clamped with partition, and power supply is connected on positive and negative electrode.
The characteristics of the utility model, is:
This system at least has the advantage that
(1) this system carries out at depth concentration waste water by using mesohigh reverse osmosis unit and ED ion-exchange membrane facility
Reason, process, the yield of waste water only produce the high-salt concentrated water for having 5% or so up to 95% or more without phase-change for the separation for the treatment of fluid,
Realize minimizing.Meanwhile energy consumption needed for evaporation and crystal process can be greatly reduced, so as to reduce being processed into for waste water
This.
(2) evaporation and crystal process of this system improves the temperature of secondary steam by vapour compression machine, and makes to use it to
Temperature raising is carried out to feed liquid, high-salt concentrated water is heated instead of raw steam, no longer needs to that raw steaming can be substantially reduced using raw steam
The dosage of vapour；On the other hand, by being evaporated crystallization to high-salt concentrated water, separate and recover sodium sulphate in high-salt concentrated water and
Sodium chloride, collect evaporative crystallization generate condensed water enter reuse water tank, it can be achieved that high slat-containing wastewater zero-emission.
(3) fouling and dirty stifled problem easily occurs on membrane process surface for organic matter in the prior art and calcium ions and magnesium ions,
The present apparatus takes two kinds of measures: first is that in preprocessing process use carbon dioxide decalcification technique, can by the calcium in waste water from
Son drops to 50mg/L hereinafter, being avoided that organic fouling and calcium ions and magnesium ions after several times are concentrated in film surface the problem of fouling；Second is that
Increase the runner of reverse-osmosis membrane element, so that reverse osmosis unit membrane component is not susceptible to asking for ion fouling and organic fouling
Topic.
Detailed description of the invention
Fig. 1 is Tthe utility model system schematic diagram.
In figure, 1- carbon dioxide gaseous state basin, 2- carbon dioxide decalcification device, 3- high-salt wastewater inlet valve, 4- titanium dioxide
Carbon intake valve, 5- circulating pump, 6-PH adjustment tank, 7- flocculation reaction tank, 8- gravity inclined-plate clarifying basin, 9- intermediate pool, 10- ultrafiltration
Raw water pump, 11- ultrafiltration apparatus, 12- mesohigh reverse osmosis unit, 13- fresh water tanks, 14- fresh water reuse pump, 15- level-one concentrated water
Slot, 16-ED ion-exchange membrane facility water supply pump, 17-ED ion-exchange membrane facility, 18- second level concentrated water case, 19- vaporising device water supply pump, 20-
Vaporising device.
Specific embodiment
The utility model is described in detail with reference to the accompanying drawings and detailed description.
Shown in referring to Fig.1, the high slat-containing wastewater zero-discharge treatment system, including the reverse osmosis dress of pretreatment system, mesohigh
It sets, ED ion-exchange membrane facility 17 and vaporising device 20, wherein pretreatment system includes be communicated with carbon dioxide gaseous state basin 1 two
Carbonoxide decalcification device 2, carbon dioxide decalcification device 2 are sequentially communicated pH adjustment tank 6, flocculation reaction tank 7, gravity inclined-plate clarifying basin
8 to intermediate pool 9；Mesohigh reverse osmosis unit includes being sequentially communicated ultrafiltration apparatus 11 with intermediate pool 9 and mesohigh is reverse osmosis
Device 12,12 1 tunnel of mesohigh reverse osmosis unit are connected to fresh water tanks 13, and another way is connected to level-one concentrated water slot 15, level-one concentrated water
Slot 15 is connected to ED ion-exchange membrane facility 17, and ED ion-exchange membrane facility 17 is respectively communicated with second level concentrated water case 18 and intermediate pool 9, second level concentrated water
Case 18 is connected to vaporising device 20, and vaporising device 20 connects crystal salt storage tank.
Wherein, carbon dioxide storage is spare in carbon dioxide basin 1.It is communicated on carbon dioxide decalcification device 2 with high salt useless
1 air inlet pipe of water water inlet pipe and carbon dioxide gaseous state basin controls high-salt wastewater inflow, carbon dioxide by inlet valve 3 respectively
1 pipeline of gaseous state basin is equipped with carbon dioxide valve 4, and carbon dioxide decalcification device 2 is equipped with circulation line, passes through circulation
Pump 5 realizes decalcification circulation.
Blender is equipped in pH adjustment tank 6 and flocculation reaction tank 7.Multiple rows of inclined plate, pond are equipped in the middle part of gravity inclined-plate clarifying basin 8
The lower part of body is biconial structure.The high-salt wastewater that contains of intermediate pool 9 is squeezed into ultrafiltration apparatus 11 by ultrafiltration raw water pump 10,
The mesohigh reverse osmosis unit 12 being connected with ultrafiltration apparatus 11 is two, is connected to fresh water tanks 13 all the way, passes through fresh water
Reuse pump 14 will treated high-salt wastewater fresh water reuse.
Level-one concentrated water slot 15 is connected to ED ion-exchange membrane facility 17 by ED ion-exchange membrane facility water supply pump 16 and pipeline, is passed through
Second level concentrated water case 18 is connected to by vaporising device water supply pump 19 and pipeline with vaporising device 20.
The implementation process of this system are as follows:
Carried out in conditioning tank containing high-salt wastewater homogeneous and amount adjust after from inlet valve 3 enter carbon dioxide decalcification device
In 2, carbon dioxide enters in totally enclosed type carbon dioxide decalcification device 2 from gaseous state basin 1, and carbon dioxide is fully dissolved
It in waste water, chemically reacts, the calcium ion in generation carbonate or bicarbonate radical, with waste water, which reacts, generates calcium carbonate
Or calcium bicarbonate (if carbon dioxide is passed through excess).In this process, the intake of carbon dioxide is to pass through carbon dioxide
PH table realizes the dosage of carbon dioxide to control carbon dioxide valve 4.The amount that carbon dioxide is passed through is more, and pH value is got over
It is small, eventually no longer change after pH=5.6, carbon dioxide is just saturated in water.
In addition, being equipped with circulating pump 5, internal circulating load Q in the outside of decalcification deviceCirculation=QWater inlet× 50%.
Supersaturation carbon dioxide not soluble in water can escape in water from liquid level, but in upper space be it is totally-enclosed, will not
Into external environment, when gas-water ratio is varied, the carbon dioxide for escaping water body can be again dissolved in water, not will cause wave
Take.Meanwhile if carbon dioxide will cause certain pressure in upper space, the solubility of carbon dioxide in water can be accelerated.
Under normal pressure, CO2Solubility in water is 14.49g/100g, and pressure increase, solubility can be with pressure increase.
The carbon dioxide being substantially soluble in water enters pH adjustment tank from the bottom of carbon dioxide decalcification device 2 together with waste water
6, lime or sodium hydroxide, aluminium polychloride and polyacrylamide are then sequentially added in pH adjustment tank 6, and anti-by stirring
It answers device to carry out flocculation and/or precipitation process to waste water, when pH reaches 9.8~10.2, stops dosing.Carbonic acid in pH adjustment tank
Root or bicarbonate radical can sufficiently react generation calcium carbonate with calcium ion under this condition.
Further, the calcium carbonate gravity flow generated in pH adjustment tank 6 enters in flocculation reaction tank 7, and flocculant passes through medicine
Valve is added in flocculation reaction tank 7, while being stirred using blender, is acted on using the gantry of flocculant, is kept calcium carbonate thin
Little particle forms bigger particle, convenient for precipitating.
Further, the waste water gravity flow flocculated enters gravity settling basin 8 and carries out mud-water separation.For accelerated sedimentation effect
Fruit can generally be considered as inclined plate packing, deposition efficiency can be improved, save land area.The supernatant outflow precipitated, into
Enter intermediate pool, at this time the Ca in water2+<50mg/L。
Further, the waste water of intermediate pool 9 is entered in ultrafiltration apparatus 11 by ultrafiltration raw water pump 10, removes the glue in waste water
Body, SDI < 4 of ultra-filtration water, subsequently into mesohigh reverse osmosis unit 12, waste water is carried out in mesohigh reverse osmosis unit 12
Desalting processing, salt rejection rate is up to 97% or more.The fresh water of generation enters fresh water tanks 13, is back to life by fresh water reuse pump 14
It produces, water quality is better than standards for industrial water usage.
Further, the concentrated water that mesohigh reverse osmosis unit 12 generates enters level-one concentrated water slot 15, through ED ion-exchange membrane facility
Waste water is sent into ED ion-exchange membrane facility 17 by water supply pump, and ED ion-exchange membrane facility 17 can generate mesohigh reverse osmosis unit 12 dense
Water is further concentrated, and the concentrated water salt content of generation may be up to 150g/L, carries out high power concentration, decrement to the salt in waste water.ED
The fresh water TDS that ion-exchange membrane facility 17 generates is smaller than 8g/L, and the ED ion-exchange membrane facility fresh water formed afterwards enters intermediate pool 9, ED
17 concentrated water of ion-exchange membrane facility is condensed into high-salt concentrated water and enters second level concentrated water pond, as evaporation.It is again introduced into ultrafiltration apparatus 11
Desalination is carried out with mesohigh reverse osmosis unit 12.
According to a feasible embodiment, the operating pressure of mesohigh reverse osmosis unit 12 is 1.2~2.5MPa, middle height
The material for pressing reverse osmosis unit membrane component is aromatic polyamide composite material, and the width of flow path of the membrane component is 1.65
~2.05mm is, it can be achieved that salt rejection rate is greater than 97%.
Further, the concentrated water that ED ion-exchange membrane facility 17 generates enters in second level concentrated water case 18, by vaporising device water supply pump
It is evaporated in 19 feeding vaporising devices 20, generates crystal salt joint disposal.Final waste water fully recovering, realizes zero-emission.
According to a feasible embodiment, ED ion-exchange membrane facility is by partition, amberplex, electrode, clamping device
Equal main components composition.The electrode supply automatically switches high-frequency direct-current power supply using positive-negative polarity, and utilizes digital process control
Power supply processed uses the adjustable clearance high frequency oscillation output high frequency electric current of falling polarity DC to upset the polarization easily formed in film surface
Layer destroys the calcium and magnesium cation under the high concentration multiple in polarization layer, destroys crystallization process and its molecule is caused to be disproportionated, be not easy to tie
Dirt.Amberplex has selective penetrated property to the ion of different charges.Anode membrane only allows to prevent anion logical by cation
It crosses；Cavity block only allows to prevent cation from passing through by anion.Under the action of applying direct current electric field, water intermediate ion is oriented
Migration.Since film group device is made of multilayer compartment, therefore the zwitterion in light room moves in adjacent dense room, to make
Brackish water desalination.
The evaporative crystallization technique of high-salt concentrated water in concentrated water pond is completed as follows: the high saliferous in concentrated water pond
Concentrated water is evaporated crystallization, the chilled nitre crystallization of the nitre mother liquor that evaporative crystallization generates by vaporising device 20 under negative pressure or micro-positive pressure
By freezing nitre centrifugal separator centrifuge separation after device freezing and crystallizing, the ten water nitre return for being centrifuged generation is evaporated with through the nitre
It is centrifuged machine again after what crystallization apparatus generated melt containing solid nitre liquid heat and isolates solid sodium sulfate, it is anhydrous through being dried to obtain commodity
Sodium sulphate is evaporated through salt under negative pressure or micro-positive pressure by the freezing nitre mother liquor that the freezing nitre centrifugal separator centrifugation generates and is tied
Brilliant device evaporative crystallization isolates solid sodium chloride, is dried to obtain commodity anhydrous sodium chloride or commodity sodium sulphate.
Waste water is tentatively reduced waste water after pretreatment into mesohigh reverse osmosis unit 12 after pretreatment
High pressure reverse osmosis concentrated water is formed after change processing, high pressure reverse osmosis concentrated water carries out depth concentration again through ED ion-exchange membrane facility again
After be condensed into high-salt concentrated water, realize the secondary minimizing of the waste water.During fresh water through 17 technique of ED ion-exchange membrane facility returns to
High pressure reverse osmosis unit 12；Pass through evaporative crystallization technique into commodity sulphur by the concentrated water that decrement is concentrated in ED ion-exchange membrane facility 17 again
Sour sodium and commodity sodium chloride.
It is that will contain industrial wastewater high in salt to pass through that double films (RO+ED), which handle industrial high-salt wastewater decrement and zero-discharge technology,
Pretreatment, enters desalting processing into mesohigh reverse osmosis unit, realizes that the salt rejection rate of fresh water, can direct reuse up to 97% or more
In production.The concentrated water amount that mesohigh reverse osmosis unit generates is bigger, and salt directly steams investment very usually in 20g/L or so
Greatly, direct emission will cause environmental pollution.By double films (RO+ED) system, the strong brine that mesohigh reverse osmosis unit is generated
Decrement is further concentrated using ED ion-exchange membrane facility, wastewater flow rate can be reduced to 95% or more, the concentration of salt can concentrate to 150~
160g/L reduces greatly the water of strong brine on ground, reduces strong brine evaporation investment cost and operating cost.
By double films (RO+ED) handle industrial high-salt wastewater decrement and zero-discharge technology can be obtained fresh water and it is minimal amount of,
The strong brine of high concentration.Industrial high-salt wastewater can be concentrated 10 times or more.
Wherein, the pretreating process of waste water is to carry out chemistry to waste water by entering before double film (RO+ED) techniques to waste water
Method decalcification magnesium hardness blocks membranous system in order to avoid waste water is saturated and fouling in high magnification numbe concentration Shi Hangcheng calcium salt.
The utility model is not limited to above-described embodiment, on the basis of technical solution disclosed by the utility model, this
For the technical staff in field according to disclosed technology contents, not needing creative labor can be special to some of which technology
Sign makes some replacements and deformation, these replacements and deformation are within the protection scope of the present utility model.
Claims (9)
1. a kind of high slat-containing wastewater zero-discharge treatment system, it is characterised in that: including pretreatment system, the reverse osmosis dress of mesohigh
It sets, ED ion-exchange membrane facility (17) and vaporising device (20), wherein pretreatment system includes being communicated with carbon dioxide gaseous state basin
(1) carbon dioxide decalcification device (2), carbon dioxide decalcification device (2) are sequentially communicated pH adjustment tank (6), flocculation reaction tank
(7), gravity inclined-plate clarifying basin (8) is to intermediate pool (9)；Mesohigh reverse osmosis unit includes being sequentially communicated with intermediate pool (9)
Ultrafiltration apparatus (11) and mesohigh reverse osmosis unit (12), mesohigh reverse osmosis unit (12) are connected to fresh water tanks (13) all the way,
Another way is connected to level-one concentrated water slot (15), and level-one concentrated water slot (15) is connected to ED ion-exchange membrane facility (17), ED ion-exchange membrane facility
(17) it is respectively communicated with second level concentrated water case (18) and intermediate pool (9), second level concentrated water case (18) is connected to vaporising device (20), evaporation dress
Set (20) connection crystal salt storage tank.
2. a kind of high slat-containing wastewater zero-discharge treatment system according to claim 1, it is characterised in that: the carbon dioxide
High-salt wastewater water inlet pipe and carbon dioxide gaseous state basin (1) air inlet pipe are communicated on decalcification device (2), on high-salt wastewater water inlet pipe
Equipped with inlet valve (3), carbon dioxide gaseous state basin (1) air inlet pipe is equipped with carbon dioxide valve (4).
3. a kind of high slat-containing wastewater zero-discharge treatment system according to claim 1, it is characterised in that: the carbon dioxide
Decalcification device (2) is equipped with circulation line, and circulation line is equipped with circulating pump (5).
4. a kind of high slat-containing wastewater zero-discharge treatment system according to claim 1, it is characterised in that: the pH adjustment tank
(6) and in flocculation reaction tank (7) it is equipped with blender.
5. a kind of high slat-containing wastewater zero-discharge treatment system according to claim 1, it is characterised in that: the gravity inclined plate
Multiple rows of inclined plate is equipped in the middle part of sedimentation basin (8), the lower part of pond body is biconial structure.
6. a kind of high slat-containing wastewater zero-discharge treatment system according to claim 1, it is characterised in that: filled with the ultrafiltration
It sets the mesohigh reverse osmosis unit (12) that (11) are connected and is at least two.
7. a kind of high slat-containing wastewater zero-discharge treatment system according to claim 1, it is characterised in that: the pH adjustment tank
(6) NaOH has been added in.
8. a kind of high slat-containing wastewater zero-discharge treatment system according to claim 1, it is characterised in that: the mesohigh is anti-
The material of permeability apparatus (12) membrane component is aromatic polyamide composite material, the width of flow path of membrane component is 1.65~
2.05mm。
9. a kind of high slat-containing wastewater zero-discharge treatment system according to claim 1, it is characterised in that: the ED ionic membrane
Device (17) includes partition, amberplex, electrode and clamping device, wherein if passing through partition between dry plate amberplex
Isolation, the ionic membrane at both ends is respectively equipped with positive and negative anodes, and ionic membrane and partition are fixedly clamped using clamping device, and power supply connects
It connects and is connecing on the electrode.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110127906A (en) * | 2019-06-12 | 2019-08-16 | 兖州煤业股份有限公司 | It is the method for reverse osmosis concentrated water desalination using benzyltriethylammoinium chloride |
| CN110642317A (en) * | 2019-10-12 | 2020-01-03 | 江钨世泰科钨品有限公司 | Sodium sulfate wastewater resource utilization method |
| CN110734179A (en) * | 2019-04-26 | 2020-01-31 | 中创水务科技环保(广东)有限公司 | waste water treatment and MVR crystallization salt separation process and device |
| CN113336379A (en) * | 2021-05-28 | 2021-09-03 | 中国石油大学(北京) | Treatment method of chlorine-containing sewage with high salinity |
| CN114853280A (en) * | 2022-05-19 | 2022-08-05 | 广州市香港科大霍英东研究院 | Low-carbon emission reduction treatment method for high-salt high-calcium high-silicon industrial wastewater |
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2018
- 2018-08-09 CN CN201821280554.1U patent/CN208700815U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110734179A (en) * | 2019-04-26 | 2020-01-31 | 中创水务科技环保(广东)有限公司 | waste water treatment and MVR crystallization salt separation process and device |
| CN110127906A (en) * | 2019-06-12 | 2019-08-16 | 兖州煤业股份有限公司 | It is the method for reverse osmosis concentrated water desalination using benzyltriethylammoinium chloride |
| CN110642317A (en) * | 2019-10-12 | 2020-01-03 | 江钨世泰科钨品有限公司 | Sodium sulfate wastewater resource utilization method |
| CN113336379A (en) * | 2021-05-28 | 2021-09-03 | 中国石油大学(北京) | Treatment method of chlorine-containing sewage with high salinity |
| CN114853280A (en) * | 2022-05-19 | 2022-08-05 | 广州市香港科大霍英东研究院 | Low-carbon emission reduction treatment method for high-salt high-calcium high-silicon industrial wastewater |
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