CN101935111B - Wastewater recycling preparation system with low energy consumption - Google Patents
Wastewater recycling preparation system with low energy consumption Download PDFInfo
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- CN101935111B CN101935111B CN 201010265113 CN201010265113A CN101935111B CN 101935111 B CN101935111 B CN 101935111B CN 201010265113 CN201010265113 CN 201010265113 CN 201010265113 A CN201010265113 A CN 201010265113A CN 101935111 B CN101935111 B CN 101935111B
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Abstract
The invention relates to a wastewater recycling preparation system with low energy consumption, comprising a reverse osmosis membrane system, an influent fitting and a nanofiltration membrane system. The reverse osmosis membrane system comprises at least one group of reverse osmosis membrane assemblies which are connected in parallel, the nanofiltration membrane system comprises at least one group of nanofiltration membrane assemblies which are connected in parallel, an influent hole of the reverse osmosis membrane system is connected with a pretreated pressurized effluent hole through a connecting fitting, an effluent hole of the reverse osmosis membrane system is connected with an influent hole of the nanofiltration membrane system through a connecting fitting, and the reverse osmosis membrane assemblies and the nanofiltration membrane assemblies are connected with reverse osmosis nanofiltration water production holes. The system of the invention also comprises a liquid cleaning inlet, an influent pressure transformer, an influent in-situ pressure gauge and a water production sampling valve. The invention has the advantages of continuous operation, water production reaching the industrial water requirement, low equipment operation pressure, low energy consumption, simple operation, convenient maintenance, high degree of automation, safe and stable operation, environmental protection, economy, and the like, fills the gap of reasonably preparing industrial water in a whole plant through wastewater treatment, wide range of applicable influent salt contents and lower investment cost compared with a nanofiltration device and an electro-adsorption device.
Description
Technical field
The present invention relates to sewage recovering system, be specifically related to a kind of waste water recycling preparation system of low energy consumption.
Background technology
China is the with serious pollution country of shortage of water resources and water, in Eleventh Five-Year Plan, enterprise aspect the energy and resource circulation utilize, is had higher requirement.How more effectively energy savings, cut down the consumption of energy, reduce wastewater discharge, will become a key factor that influences the enterprises comprehensive competitiveness.Waste water recycling is the final goal of wastewater treatment, is the effective means that industry energy conservation reduces discharging.
Under the overall background of energy-saving and emission-reduction policy; The waste water that some steel production enterprise will reach discharge standard is through the tandem circulating and recovering, with the utilization of industry water mixing circulation or make number of ways such as preparatory desalted water, pure water and carried out a large amount of reuses, but still has following limitation:
Though 1, part waste water reaches discharge standard after treatment, because of the salt content height can not directly discharge in reuse.
2, it is little that the wastewater flow rate of producing preparatory desalted water, pure water consumption accounts for the proportion of wastewater discharge, and the recycling of waste water also all is in the simplification reuse.
3, waste water does not have desalting processing in processing procedure, in the circulating and recovering process, because the long-term enrichment of concentrated and ion causes waste water processing station water outlet salt content increasingly high.Recycle-water high salinity, particularly high contents of calcium and magnesium hardness, high chloride ion content are prone to cause pipeline, equipment scaling and corrosion in the process of reuse.
4, based on the requirement of steel industry development policies to ton steel water consumption, some enterprises have influence on equipment life and product quality for reducing ton index of steel water consumption with qualified discharge waste water direct reuse.
Therefore, on the mode of waste water recycling, not reuse and mixing simply is very important to the advanced treating of waste water.
It is waste water recycling approach preferably that current waste water is processed industry water, and steel plant's whole plant waste water station water outlet salt content will reach the water standard of industry water about 800～2000 mg/litre, just need carry out desalting processing.Desalter mainly contains at present: equipment such as ion-exchanger, electrodialysis (ED), electrodeionization interchanger (EDI), electric absorption method (EST), counter-infiltration (RO), nanofiltration (NF), distillation and multifunction electric Water Treatment device.
One, zwitterion interchanger
The zwitterion interchanger is the equipment that exchanges, reduces the water outlet salt content through cation, anion in positive resin anion (R.A.) in the interchanger and the water, and exhausted resin recovers exchange capacity through acid-alkali regeneration.This equipment water treatment field such as is produced at water demineralization, water quality desalination, high purity water and is widely used.When the water inlet salt content be not more than 500 mg/litre, it is economical producing pure water; When the salt content of waste water is high, though use this equipment effluent quality fine, regenerate frequently, produce a large amount of acidic and alkaline waste waters, contaminated environment, occupation area of equipment is big, and operating cost is high.So this method is not suitable for making industry water.
Two, electrodialysis (ED)
Electrodialysis is to adopt amberplex under the effect of DC electric field, and electrolytical zwitterion in the solution is had the selection permeability, reaches the desalination purpose.The electrodialysis desalination rate is relevant with section with the level of equipment, adopts two-stage two-segment can reach salt rejection rate 60%～70% basically.The electrodialytic rate of recovery is about 65%, water inlet preliminary treatment aspect is required lower slightly, and when water inlet salt content during in 500～4000 mg/litre, it is feasible adopting electrodialytic technique to carry out desalination.When water inlet salt content during in 800～1500 mg/litre, this equipment produces water can reach industry water water quality, but the electrodialysis power consumption is high, and the rate of recovery is low.Electrodialytic technique once was used widely before reverse osmosis applications.
Three, electrodeionization interchanger (EDI)
The electrodeionization exchange belongs to deep desalting, adopts ion selective membrane and ion exchange resin to be clipped between two electrodes of DC voltage, and desalted water is removed the water intermediate ion through its freshwater room in advance, and water outlet reaches the ultra-pure water requirement.EDI has comprised the water treatment technology of electrodialysis and two kinds of maturations of ion exchange resin desalination, requires the water inlet salt content very low, is applicable to and produces ultra-pure water, is not suitable for and produces industry water.The electron trade ultra-pure water produce with the boiler of power plant make-up water handle demineralized water produce in application wider.
Four, counter-infiltration (RO)
Counter-infiltration is the equipment that utilizes enough pressure that the water in the aqueous solution is separated with solute through reverse osmosis membrane, and reverse osmosis membrane is a core.Can select dissimilar reverse osmosis membranes according to different quality.Two sections arrangements of the general employing of conventional design for improving the rate of recovery, also can be adopted three sections arrangements in case of necessity.(electrical conductivity＜90us/cm), two-pass reverse osmosis are produced pure water (electrical conductivity＜10us/cm) to adopt first-stage reverse osmosis to produce preparatory desalted water mostly in steel production enterprise at present.The reverse osmosis deaslination rate is high, and product water water quality is fine, but the operation power consumption is high, and therefore, the whole plant waste water of salt content 800～2000 mg/litre is not suitable for directly producing industry water with counter-infiltration.The method of mixing use again with the part recycle-water of not desalination after the desalination of part recycle-water that adopts is also arranged at present.In waste water recycling, the reverse osmosis deaslination rate is about 90%～98.5%, and the rate of recovery is about 65%～75%; When salt content during in 2000～30000 mg/litre, it is rational adopting counter-infiltration to produce industry water.Counter-infiltration has occupied consequence in water treatment desalinating process system, can be used as the preparatory desalination of pure water, can produce pure water.Also be widely used in desalinization at present.
Five, electricity absorption (EST)
The capacitive character desalination is claimed in electricity absorption again, is a novel water technology that late 1990s begins to rise.Referring to Fig. 1, the electric double layer that electricity absorption basic principle is based in the electrochemistry is theoretical, utilizes the characteristic of powered electrode surface charging that the water intermediate ion is carried out Electrostatic Absorption.Get into the space that two battery lead plates are separated by and are formed through pretreated former water from an end, flow out from the other end.Former water receives effect of electric field when between cathode and anode, flowing, and charged ion moves to the electrode of opposite charges respectively in the water, by this electrode absorption and be stored in the electric double layer.Along with increasing of electrode absorption charged particle, charged particle concentrates in the electrode surface enrichment, and final realization separates with water, makes dissolved salts, colloidal solid and charge species thereof in the water be trapped in electrode surface, obtains the water outlet of desalination.
When the electrode surface current potential reached certain value, the electric double layer ion concentration reached hundreds and thousands of times of solution phase concentration, and ion is stored in the electric double layer of electrode surface under the effect of DC electric field; Reach capacity until electrode, at this moment, dc source is removed; And with the positive and negative electrode short circuit, because the disappearance of DC electric field, the ion that is stored in the electric double layer comes back in the passage; Discharge with current, electrode also obtains regeneration thus.
The electric adsorbent equipment of mainly being made up of electric adsorbed film piece requires the water inlet requirement a little less than counter-infiltration, nanofiltration to the preliminary treatment water inlet; But influent alkalinity can not be too high, and every group equipment can not be moved continuously, the interim discharging of dense water; And moment amount ion concentration reaches 5～10 times of water content into; Even higher, drain time is generally 1/2～1/5 of running time, and electricity absorption is produced water conductivity and is arrived big change procedure from big to small again with having running time.The device salt rejection rate is 65%～80%, and the rate of recovery reaches 70%～80%, is applicable to that into the water salt content adopts this equipment can reach industry water water quality in 800～1500 mg/litre.Produce every cubic metre of water power consumption and be about 1.0～1.5KW.At petrochemical industry, steel wastewater reuse and electric power plant circulating water reclaiming system a spot of application is arranged at present, many application are being arranged aspect the small-sized drinking water.
Six, nanofiltration (NF)
Nanofiltration is the equipment that utilizes certain pressure that the water in the aqueous solution is separated with solute through NF membrane.Nanofiltration belongs to partial deionization, and high to the high valence ion removal efficiency, the monovalent ion removal efficiency is low.Select for use the variety classes NF membrane different, in waste water recycling, can adopt the overall salt rejection rate of NF membrane 65%～80% to the removal efficiency of material.Nanofiltration is removed ability to monovalent ion (Cl-), but goes hardness obvious, and the operation power consumption is lower, and the rate of recovery generally can be controlled in 70%～80%.Nanofiltration utilizes and desalinization is located many application as preparatory desalter of counter-infiltration etc. at Drinking Water factory, power plant, petrochemical plant circulation sewer again.
Seven, distillation
The way of distillation is a kind of ancient method, and the essence of distillation desalination process is exactly the forming process of steam.The distillation ratio juris is the known principle that under lab prepares distilled water.Burn boiling to water, fresh water is evaporated to steam, and salt is stayed the bottom of a pan, and steam is condensed into distilled water, promptly is fresh water.This ancient method consumes mass energy, produces a large amount of bird nests, is difficult to a large amount of fresh water of producing.But because technology is constantly improved and developed, application multi-effect flashing steam (MSF), multistage distillation (MED) method make the ancient way of distillation shine the youth.The way of distillation is mainly produced pure water, produces pure water in medicine, laboratory, in hot method desalinization, widely applies at present.The inapplicable system industry water of this method.
Eight, multifunction electric Water Treatment device
Utilize electro-deposition techniques that part metals ion in the waste water is separated out by minus plate with solid-state form, thereby can reduce electrical conductivity of water and hardness.In the aqueous solution; When dc source applies certain voltage on the two poles of the earth, promptly there is electric current to pass through, in two interpolar generation electrolysis, ionization reaction: minus plate is separated out sediment; Sun level strong oxidizing property material can reduce organic matter in the water, ammonia nitrogen equal size, plays the effect of sterilization algae removal simultaneously.The electricity consumption of equipment amount is low, and is simple to operate, easy to maintenance.But this equipment desalination rate is low, does not reach the industry water requirement.
In view of this, seek a kind of low energy consumption waste water recycling preparation system and become pursuing one's goal of these those skilled in the art.
Summary of the invention
Task of the present invention provides a kind of low energy consumption waste water recycling preparation system, and it has solved above-mentioned existing in prior technology shortcoming, has filled up the vacancy that whole plant waste water is rationally produced industry water, and suitable water inlet salt content scope is wide.
Technical solution of the present invention is following:
A kind of low energy consumption waste water recycling preparation system, it comprises reverse osmosis membrane system, water inlet pipe fitting (4) and NF membrane system;
Said reverse osmosis membrane system is the reverse osmosis membrane assembly (6) of at least one group of parallel connection, and said NF membrane system is the nanofiltration membrane component (10) of at least one group of parallel connection;
The water inlet of said reverse osmosis membrane system connects delivery port after the preliminary treatment supercharging through connecting tube (4), and the delivery port of said reverse osmosis membrane system connects the water inlet of NF membrane system through connecting tube (4);
Said reverse osmosis membrane assembly (6) and nanofiltration membrane component (10) all connect the counter-infiltration nanofiltration and produce the mouth of a river;
Said waste water recycling preparation system also comprises the cleaning inlet that has cleaning liquid feeding side hand-operated valve (1), is connected on the connecting tube (4) of the water inlet of reverse osmosis membrane system;
Said waste water recycling preparation system also comprises intake pressure transmitter (2) and the Pressure gauge (3) on the spot of intaking, and is connected on the connecting tube (4) of the water inlet of reverse osmosis membrane system;
Said waste water recycling preparation system also comprises product water sampling valve (8), is arranged on the connecting tube (4) between reverse osmosis membrane assembly (6), nanofiltration membrane component (10) to the counter-infiltration nanofiltration product mouth of a river.
The outside of said reverse osmosis membrane assembly (6) is provided with pressure vessel for reverse osmosis (5).
The outside of said nanofiltration membrane component (10) is provided with nanofiltration putamina (9).
Said low energy consumption waste water recycling preparation system also comprises intersegmental Pressure gauge on the spot (7), is arranged on the connecting tube (4) between reverse osmosis membrane system and the NF membrane system.
Said low energy consumption waste water recycling preparation system also comprises product water Pressure gauge (11), product water rupture disk (12), product water conductivity table (13), product water flowmeter (14), product water end (W.E.) hand-operated valve (15), product Water Check Valve (16), the product total sample valve of water (17) and product water side self-draining valve (18) on the spot, is separately positioned on the connecting tube (4) between reverse osmosis membrane assembly (6), nanofiltration membrane component (10) to the counter-infiltration nanofiltration product mouth of a river.
Said low energy consumption waste water recycling preparation system also comprises dense water Pressure gauge (19), concentrated stream amount detection valve (20), dense water side self-draining valve (21), dense water end (W.E.) manual modulation valve (22), dense Water Check Valve (23), the moving stop valve (24) of dense sailor and dense pipe fitting (25) on the spot, is separately positioned on the delivery port of nanofiltration membrane component (10).
The present invention makes it compared with prior art owing to adopted above technical scheme, and this low energy consumption waste water recycling preparation system utilizes reverse osmosis membrane and NF membrane that the selection permeability different features of ion is reasonably combined, and has following advantage:
1, native system has been filled up the vacancy that whole plant waste water is rationally produced industry water, and suitable water inlet salt content scope is wide.
2, the native system operating pressure is low, so operation energy consumption is low.
3, the native system cost of investment is a little less than nanofiltration and electric adsorbent equipment.
4, full factory production waste water has the temperature slightly higher than natural water, when in waste water recycling is handled, using native system, has avoided the shortcoming that energy consumption is big at low temperatures, producing water ratio is low.This advantage is particularly evident in the winter time.
Description of drawings
Fig. 1 is the electric absorbing process schematic diagram of prior art.
Fig. 2 is the syndeton sketch map of a kind of low energy consumption waste water recycling preparation system of the present invention.
Reference numeral:
1 for cleaning the liquid feeding side hand-operated valve, and 2 is the intake pressure transmitter, and 3 for intaking Pressure gauge on the spot, and 4 is connecting tube, and 5 is pressure vessel for reverse osmosis; 6 is reverse osmosis membrane assembly, and 7 is intersegmental Pressure gauge on the spot, and 8 are each product water sampling valve, and 9 are the nanofiltration putamina; 10 is nanofiltration membrane component, and 11 for producing water Pressure gauge on the spot, and 12 for producing the water rupture disk, and 13 for producing the water conductivity table; 14 for producing water flowmeter, and 15 for producing the water end (W.E.) hand-operated valve, and 16 for producing Water Check Valve, and 17 for producing the total sample valve of water; 18 for producing water side self-draining valve, and 19 is dense water Pressure gauge on the spot, and 20 for the concentrated stream amount detects valve, and 21 is dense water side self-draining valve; 22 is dense water end (W.E.) manual modulation valve, and 23 is dense Water Check Valve, and 24 is the moving stop valve of dense sailor, and 25 is dense pipe fitting.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is elaborated.
Referring to Fig. 2; The invention provides a kind of low energy consumption waste water recycling preparation system, by clean liquid feeding side hand-operated valve 1, intake pressure transmitter 2, intake on the spot Pressure gauge 3, connecting tube 4, pressure vessel for reverse osmosis 5, reverse osmosis membrane assembly 6, intersegmental Pressure gauge on the spot 7, produce water sampling valve 8, nanofiltration putamina 9, nanofiltration membrane component 10, produce water on the spot Pressure gauge 11, produce water rupture disk 12, produce water conductivity table 13, produce water flowmeter 14, produce water end (W.E.) hand-operated valve 15, produce Water Check Valve 16, produce the total sample valve of water 17, Pressure gauge 19, concentrated stream amount detect valve 20, dense water side self-draining valve 21, dense water end (W.E.) manual modulation valve 22, dense Water Check Valve 23, the moving stop valve 24 of dense sailor and dense pipe fitting 25 and form on the spot to produce water side self-draining valve 18, dense water.
Wherein, reverse osmosis membrane system is the reverse osmosis membrane assembly 6 of at least one group of parallel connection, and the NF membrane system is the nanofiltration membrane component 10 of at least one group of parallel connection.The water inlet of reverse osmosis membrane system connects delivery port after the preliminary treatment superchargings through connecting tube 4, and the dense water delivery port of reverse osmosis membrane system connects the water inlet of NF membrane systems through connecting tube 4.Reverse osmosis membrane assembly 6 and nanofiltration membrane component 10 all connect the counter-infiltration nanofiltration and produce the mouth of a river.
The outer setting pressure vessel for reverse osmosis 5 of reverse osmosis membrane assembly 6, the outer setting nanofiltration putamina 9 of nanofiltration membrane component 10.Have on the connecting tube 4 of water inlet that the cleaning inlet that cleans liquid feeding side hand-operated valve 1 is connected reverse osmosis membrane system.Intake pressure transmitter 2 and the Pressure gauge 3 on the spot of intaking are connected on the connecting tube 4 of water inlet of reverse osmosis membrane system.Intersegmental Pressure gauge on the spot 7 is arranged on the connecting tube 4 between reverse osmosis membrane system and the NF membrane system.
Producing water sampling valve 8 is arranged on the connecting tube 4 between reverse osmosis membrane assembly 6, nanofiltration membrane component 10 to the counter-infiltration nanofiltration product mouth of a river.Product water Pressure gauge 11, product water rupture disk 12, product water conductivity table 13, product water flowmeter 14, product water end (W.E.) hand-operated valve 15, product Water Check Valve 16, the product total sample valve 17 of water and product water side self-draining valve 18 on the spot is separately positioned on the connecting tube 4 between reverse osmosis membrane assembly 6, nanofiltration membrane component 10 to the counter-infiltration nanofiltration product mouth of a river.
Dense water Pressure gauge 19, concentrated stream amount on the spot detects the delivery port that valve 20, dense water side self-draining valve 21, dense water end (W.E.) manual modulation valve 22, dense Water Check Valve 23, the moving stop valve 24 of dense sailor and dense pipe fitting 25 are separately positioned on nanofiltration membrane component 10.
In actual the use, in different regions, different water intaking approach, its industry water water source salt content is discrepant.And the difference of steel plant's technology, cause the kind of waste water of collection also to have bigger difference, its salt content can be different, but basic salt content is between 800～2000 mg/litre.
The present technique product characteristic is:
(1) this product is made up of putamina, reverse osmosis membrane assembly, NF membrane group valency, frame, pipe fitting, valve, flowmeter, pressure gauge, conductivity meter, local operation case, concentrated sampling cabinet and rupture disk etc., and all parts can be assembled on the frame.
(2) core of present technique product is the reasonable combination of reverse osmosis membrane and NF membrane; Equipment is made up of two sections (or three sections), and one section is adopted reverse osmosis membrane assembly, and two sections (or three sections) adopt nanofiltration membrane component; The preliminary treatment qualified discharge waste water of process booster pump supercharging is through being equipped with the putamina of reverse osmosis membrane; Dense water gets into two sections that NF membrane is housed, and one section and two sections is produced the water remittance and gets into industrial pond, the dense water qualified discharge that nanofiltration produces together.
(3) the present technique product allows the CL in the waste water
-, HCO
3 -, F
-, NH
4 +, Na
+, K
+Get in right amount in the product water Deng monovalent ion; Two sections counter-infiltrations make nearly all ion in dense water, concentrate, and have only the minute quantity ion to get into and produce water; And two sections nanofiltrations make the CL of a great deal of
-, F
-, NH
4 +Ion gets into and produces water.
(4) the whole salt rejection rate of present technique product is about 80%～90%, the rate of recovery 70%～80%.
(5) about 200～400 mg/litre of product water salt content of present technique product reach the water for industrial use water quality requirement.
(6) present technique product operating pressure is low, and power consumption is about 2/3 of counter-infiltration operation power consumption.
To sum up, the present technique product have continuously-running, produce that water reaches the industry water requirement, the equipment operating pressure is low, energy consumption is low, simple to operate, easy to maintenance, automaticity is high, security of operation, stable, environmental protection, economic dispatch advantage.
The effect of present technique product: present technique product system water water quality is superior to the salt content of the industrial fresh water water quality regulation of iron and steel enterprise's water supply quality standard (reference), is lower than the salt content of the industrial fresh water of producing with underground water II class water source.The present technique product is one section and adopts reverse osmosis membrane, two sections technological process and equipment that adopt NF membrane or two, three sections employing NF membrane.The present technique application range of products is that the waste water recycling that salt content is not more than 2000 mg/litre prepares in industry water.
Certainly; Those skilled in the art in the present technique field will be appreciated that; The foregoing description only is to be used for explaining the present invention; And be not with opposing qualification of the present invention, as long as in connotation scope of the present invention, all will drop in the scope of claim of the present invention the variation of the foregoing description, modification etc.
Claims (1)
1. low energy consumption waste water recycling preparation system, it comprises reverse osmosis membrane system, water inlet pipe fitting (4) and NF membrane system; Said reverse osmosis membrane system is the reverse osmosis membrane assembly (6) of at least one group of parallel connection, and said NF membrane system is the nanofiltration membrane component (10) of at least one group of parallel connection; The water inlet of said reverse osmosis membrane system connects delivery port after the preliminary treatment supercharging through connecting tube (4), and the delivery port of said reverse osmosis membrane system connects the water inlet of NF membrane system through connecting tube (4); Said reverse osmosis membrane assembly (6) and nanofiltration membrane component (10) all connect the counter-infiltration nanofiltration and produce the mouth of a river;
Said low energy consumption waste water recycling preparation system also comprises the cleaning inlet that has cleaning liquid feeding side hand-operated valve (1), is connected on the connecting tube (4) of the water inlet of reverse osmosis membrane system;
Said low energy consumption waste water recycling preparation system also comprises intake pressure transmitter (2) and the Pressure gauge (3) on the spot of intaking, and is connected on the connecting tube (4) of the water inlet of reverse osmosis membrane system;
Said low energy consumption waste water recycling preparation system also comprises product water sampling valve (8), is arranged on the connecting tube (4) between reverse osmosis membrane assembly (6), nanofiltration membrane component (10) to the counter-infiltration nanofiltration product mouth of a river; The outside of said reverse osmosis membrane assembly (6) is provided with pressure vessel for reverse osmosis (5), and the outside of said nanofiltration membrane component (10) is provided with nanofiltration putamina (9);
It is characterized in that: said low energy consumption waste water recycling preparation system also comprises intersegmental Pressure gauge on the spot (7), is arranged on the connecting tube (4) between reverse osmosis membrane system and the NF membrane system;
Said low energy consumption waste water recycling preparation system also comprises product water Pressure gauge (11), product water rupture disk (12), product water conductivity table (13), product water flowmeter (14), product water end (W.E.) hand-operated valve (15), product Water Check Valve (16), the product total sample valve of water (17) and product water side self-draining valve (18) on the spot, is separately positioned on the connecting tube (4) between reverse osmosis membrane assembly (6), nanofiltration membrane component (10) to the counter-infiltration nanofiltration product mouth of a river;
Said low energy consumption waste water recycling preparation system also comprises dense water Pressure gauge (19), concentrated stream amount detection valve (20), dense water side self-draining valve (21), dense water end (W.E.) manual modulation valve (22), dense Water Check Valve (23), the moving stop valve (24) of dense sailor and dense pipe fitting (25) on the spot, is separately positioned on the delivery port of nanofiltration membrane component (10).
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| CN102786116A (en) * | 2012-08-30 | 2012-11-21 | 北京鑫佰利科技发展有限公司 | Modular high-fold continuous membrane concentration device |
| CN103449571B (en) * | 2013-08-22 | 2015-09-30 | 煤炭科学研究总院杭州环保研究院 | Treating mine drainage method and device |
| AU2015364736B2 (en) * | 2014-12-19 | 2020-11-19 | The Coca-Cola Company | On-demand system for drawing and purifying well water |
| CN107304090A (en) * | 2016-04-21 | 2017-10-31 | 广州市心德实业有限公司 | A kind of Resourceful treatment method for high-salinity wastewater of sodium chloride-containing and sodium sulphate |
| CN109092182A (en) * | 2017-06-21 | 2018-12-28 | 宝钢工程技术集团有限公司 | Lime stone mud cake returns the device and its application method of Commercial cultivation |
| CN112939150A (en) * | 2020-09-11 | 2021-06-11 | 南京中电环保水务有限公司 | Full-automatic high-recovery-rate salt separation integrated system and method |
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| CN101302072A (en) * | 2008-06-27 | 2008-11-12 | 东南大学 | Dye pesticide waste water reverse osmosis-nanofiltration combined membrane separation material recovery process and apparatus |
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| JP2003117553A (en) * | 2001-10-16 | 2003-04-22 | Toray Ind Inc | Method and apparatus for producing fresh water |
| JP2003200161A (en) * | 2002-01-09 | 2003-07-15 | Toray Ind Inc | Water making method and water making apparatus |
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| CN201240893Y (en) * | 2008-05-22 | 2009-05-20 | 浙江玉泉环境工程有限公司 | Water-saving reverse osmosis unit |
| CN101302072A (en) * | 2008-06-27 | 2008-11-12 | 东南大学 | Dye pesticide waste water reverse osmosis-nanofiltration combined membrane separation material recovery process and apparatus |
| CN101428913A (en) * | 2008-12-11 | 2009-05-13 | 彩虹彩色显像管总厂 | Reverse osmosis water production process |
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