CN105000737B - A kind of Industrial sewage treatment system and sewage water treatment method - Google Patents
A kind of Industrial sewage treatment system and sewage water treatment method Download PDFInfo
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- CN105000737B CN105000737B CN201510403926.XA CN201510403926A CN105000737B CN 105000737 B CN105000737 B CN 105000737B CN 201510403926 A CN201510403926 A CN 201510403926A CN 105000737 B CN105000737 B CN 105000737B
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Abstract
A kind of Industrial sewage treatment system and sewage water treatment method, it includes a regulating reservoir for collecting sewage, thereafter the pretreatment system being mutually then mainly made up of V-type filter tank, mutually then one-level " ultrafiltration+reverse osmosiss " system after the pretreatment system, it is characterized in that after reverse osmosis units in one-level " ultrafiltration+reverse osmosiss " system, reverse osmosis concentrated water enters at least one-level frequently pole-reversing electroosmosis system that is attached thereto and is concentrated all the way, and another road fresh water connection reuse pool is communicated with the reuse water outlet pipe of reuse pool；Concentrated water outlet after the frequently pole-reversing electroosmosis system is connected to one and can carry out a detached bivalence to monovalence and divalent salts and separates electrodialysis system, one bivalence separation electrodialysis system is connected behind to have a pair of monovalent salts to carry out concentration and recovery and obtain the MVR vaporising devices of crystallization sodium chloride, and a bivalence separates electrodialysis system water outlet below and is connected with least another grade frequently pole-reversing electroosmosis system, water outlet connection reuse pool after the frequently pole-reversing electroosmosis system, concentrated water outlet is connected to another MVR vaporising devices that can obtain sulfate crystal salt.
Description
Technical field
The present invention relates to a kind of Industrial sewage treatment system of achievable zero-emission and sewage water treatment method, belong to ring
Water conservation processing technology field.
Background technology
Sewage " zero-emission " refers to industry water after reuse, by this part salinity and pollutant are highly concentrated shortens dirt into
Water is whole（More than 99%）Recycling, discharges factory without any waste liquid.Salt and pollutant in water through condensing crystallizing with
Solid form is discharged factory and send destructor plant landfill or reclaimed as useful industrial chemicals.
The zero-emission sewage disposal technology for adopting at present mainly includes：Pretreatment+ultrafiltration+reverse osmosiss+multiple-effect evaporation, is shown in figure
Shown in 1, specific content is：
Each stock water inlet after biochemical treatment initially enters reuse water device regulating reservoir 1, and homogenizing is lifted into after measuring
In pretreatment system, i.e. V-type filter tank 2, float and the colloidal material in sewage is removed through sand filtration, in V-type filter tank, filtrate is adopted
Special filtrate is used, with the function of removing cobalt and manganese；Sand filtration water outlet enters one-level " ultrafiltration+reverse osmosiss " system 3, ultra filtration unit
11 main effects are that separating suspension macromolecular colloid, glutinous mud, microorganism, Organic substance etc. can cause dirty blocking up to reverse osmosis membrane
Impurity, reverse osmosis units 12 carry out desalting processing, it is ensured that water quality reaches reuse requirement；
Softening equipment and self-cleaning filter 4 are set before ultrafiltration, are prevented pipeline and device structure, and follow-up film process is risen
Protective effect.
Reverse osmosis concentrated water after reverse osmosis units 12 enters RO concentrated waters pond 5 disposed behind, and recycle-water is sent into
Reuse pool 6.
First-stage reverse osmosis concentrated water is pooled to behind RO concentrated waters pond 5, the reverse osmosis concentrated water in pond is sent into life connected behind
Change the materials such as processing unit 7, the COD being concentrated in removal water quality, ammonia nitrogen, guarantee is provided for subsequent film processing unit；After biochemistry
Water outlet is again introduced into two grades of " ultrafiltration+reverse osmosiss " systems 8, and the main effect of ultra filtration unit therein 13 is that separating suspension divides greatly
Sub- colloid, glutinous mud, microorganism, Organic substance etc. can cause dirty stifled impurity, reverse osmosis units 14 to carry out desalination to reverse osmosis membrane
Process, it is ensured that water quality reaches reuse requirement.Equally electric descaler and self-cleaning filter can be set before ultrafiltration, prevent pipeline and
Device structure, and follow-up film process is shielded.
Reverse osmosis concentrated water after two grades of " ultrafiltration+reverse osmosiss " systems 8 enters follow-up two sections of OCRO, i.e., open anti-
Infiltration 9 further concentrating and desalinating of processing unit；Recycle-water equally sends into reuse pool 6.
Final strong brine salinity about 10%, according to local meteorological condition and the principle of saving operating cost, in summer high temperature
The evaporation capacity big period, strong brine enters evaporation pond and carries out nature mummification；Ice period and evaporation capacity little period in the winter time, dense salt
Water enters 10 crystallization apparatus of multiple-effect evaporation and is processed.
Hyperfiltration reverse-rinsing water enters front end biochemical wastewater treatment unit from pond, backwash water itself is produced after collecting.Middle water is dense
Aquaticization processing unit sludge enters sewage disposal sludge concentration tank and is processed.
As the units such as reuse water treatment facilities V-type filter tank, filter, ultrafiltration need to carry out backwash, there is part to produce water and do
For backwash water, reprocess after backwash water needs collection, therefore reuse water device arranges backwash pond according to the internal backwash water yield.
The advantage of above-mentioned existing zero-emission sewage disposal technology has：
1) adopt ultrafiltration as the pretreatment of reverse osmosiss, effluent quality is high, water stabilization, and substantially by the change of source water
Affect;The granule that effectively can go in eliminating water, float, colloid, antibacterial, virus, are a kind of reliable water technologies;As anti-
The pretreatment of infiltration, than the SDI values that conventional pretreatment can substantially reduce feed water by reverse osmosis, extends the use longevity of reverse osmosis unit
Life.
2) using reverse osmosis membrane as water demineralizing process simply to water in salt carried out a certain degree of concentration, one
The level response rate is more than 75%, and secondary recovery rate is more than 90%, and two grades of strong brine is utilized as the fill cycle of one-level, the dense salt of one-level
The direct devaporation equipment of water.99% water of whole system carries out reuse, outer row.Avoid acid, alkali, the corrosion of salt and acid, alkali to give up
The outer row of liquid, reduces the pollution to environment.The moisturizing of recirculated water can be done through the water of coagulation, two grades of producing water water quality is steady
Fixed, the water quality requirement of the system waters such as boiler, cold-rolling pickling, rinsing is fully met, and with the features such as energy-saving and environmental protection.
But above-mentioned existing zero-emission sewage disposal technology there is also more obvious technological deficiency, mainly have：
So-called " zero-emission " in the above zero-emission sewage disposal is not zero-emission truly, and it cannot
Realize efficiently separating and utilizing for various materials in sewage；Sewage has been carried out reuse simply, and the water intermediate ion of reuse, solid
Thing is converted into crystalline solid in above-mentioned technical process, need to carry out security landfill process as dangerous solid waste, it is desirable to auxiliary construction
Dangerous solid waste landfill site with high investment；Additionally, the sewage scratch pool of the big volume of auxiliary construction is also needed, the capacity one of sewage scratch pool
As need even nearly million cubic metres of hundreds of thousands, invest more than one hundred million units；And crystalline solid deals with issuable secondary ring improperly
Border pollution and sewage scratch pool environmental risk hidden danger；This part waste residue need to carry out security landfill as hazardous waste；In addition tie
Containing highly concentrated metal ion and Organic substance in brilliant solid, once deal with improperly, after buried solid matter is once dissolve
Toxic heavy metal ion contained by which will pollute our ground water regime, so this technology is in economic level
" zero-emission " technology.
Content of the invention
It is an object of the invention to overcoming the shortcomings of that prior art is present, and provide a kind of structure composition rationally, user
Just reliable, the separating treatment of bi-membrane method salt on the basis of the Treated sewage reusing of existing sewage disposal, can be carried out, the near of sewage is realized
Zero-emission is reclaimed, and reduces processing system and method to periphery eco-environmental impact and the trade effluent for destroying.
The purpose of the present invention by following technical solution completing, a kind of Industrial sewage treatment system, it includes one
Collect the regulating reservoir of sewage, the pretreatment system being mutually then mainly made up of V-type filter tank thereafter connects after the pretreatment system
One-level " ultrafiltration+reverse osmosiss " system, after the reverse osmosis units in one-level " ultrafiltration+reverse osmosiss " system, reverse osmosis all the way
Thoroughly concentrated water enters at least one-level frequently pole-reversing electroosmosis system that is attached thereto and is concentrated, and another road fresh water connects recycle-water
Pond is communicated with the reuse water outlet pipe of reuse pool；
After the frequently pole-reversing electroosmosis system concentrated water outlet be connected to one monovalence and divalent salts can be carried out detached
One bivalence separates electrodialysis system, and the bivalence separates that electrodialysis system is connected behind to have a pair of monovalent salts to carry out concentration and recovery simultaneously
Obtain crystallize sodium chloride MVR vaporising devices, and a bivalence separate electrodialysis system water outlet below be connected with to
Few another grade of frequently pole-reversing electroosmosis system, the water outlet connection recycle-water after the frequently pole-reversing electroosmosis system
Pond, concentrated water outlet are connected to another MVR vaporising devices that can obtain sulfate crystal salt.
Currently preferred it is：Described reverse osmosis concentrated water all the way enters being attached thereto, connecting successively two grades frequently
Pole-reversing electroosmosis system is simultaneously concentrated, and the concentrated water outlet wherein after previous stage frequently pole-reversing electroosmosis system is connected to described
One bivalence separates electrodialysis system, and water outlet is connected to rear stage frequently pole-reversing electroosmosis system, and is frequently fallen by rear stage
The water outlet connection reuse pool of pole electrodialysis system is communicated with the reuse water outlet pipe of reuse pool, and concentrated water exports phase
It is connected to the MVR vaporising devices for accessing sulfate crystal salt.
Currently preferred it is：A described bivalence separates electrodialysis system water outlet below and is connected with and connects successively
Another two grades of frequently pole-reversing electroosmosis systems, the water outlet of wherein previous stage frequently pole-reversing electroosmosis system is connected on rear stage
Frequently pole-reversing electroosmosis system, and the water outlet connection reuse pool of rear stage frequently pole-reversing electroosmosis system or and reuse
The reuse water outlet pipe in pond is communicated；And the concentrated water outlet below of described two grades frequently pole-reversing electroosmosis systems for connecting successively
The MVR vaporising device that access sulfate crystal salt is connected on respectively.
The present invention is further preferably：Described frequently pole-reversing electroosmosis system is mainly made up of an electrodialyzer, should
Electrodialyzer is mainly made up of anions and canons exchange membrane, dividing plate and electrode, and the compartment that the dividing plate is constituted is the logical of liquid stream process
Road, and the compartment that fresh water is passed through is desalting chamber, the compartment that concentrated water is passed through is enriched chamber；
A described bivalence separates electrodialysis system and is mainly on the basis of existing electrodialyzer, can reach one from one
The detached monovalent ion exchange membrane of valency divalent ion, and on the female die surface of monovalent ion exchange membrane with one layer very thin sun from
The charged layer of son, has one layer of very thin highly cross-linked film on anode membrane surface；
Described MVR vaporising devices are mainly by feed pump, at least two grades preheaters, heater, vapour liquid separators of series connection
Composition is sequentially connected, material carries out solid-liquid separation through the centrifuge being pumped into that discharges thereafter, arranges in the heater to separator
After the indirect steam for going out is admitted to centrifugation vapour compression machine compression, steam is re-fed into heater heated material, in heating thing
During material, the steam condensate (SC) of generation has condensate pump to discharge.
A kind of sewage water treatment method using the Industrial sewage treatment system, described sewage water treatment method includes as follows
Step：
a）Pretreatment, each stock sewage initially enter regulating reservoir, and homogenizing is lifted into V-type filter tank after measuring, and remove through sand filtration
Float and colloidal material in sewage；
b）Sand filtration water outlet enters " ultrafiltration+reverse osmosiss " system, and the main effect of ultra filtration unit is separating suspension macromole
Colloid, glutinous mud, microorganism, Organic substance etc. can cause dirty stifled impurity, reverse osmosis unit to carry out desalting processing to reverse osmosis membrane；
c）Reverse osmosis concentrated saline enter "+one bivalence of frequently pole-reversing electroosmosis system (EDR) separate electrodialysis system (ED)+
The combined treatment unit that frequently pole-reversing electroosmosis system (EDR)+MVR vaporising devices " are constituted, wherein：
The advanced EDR units of reverse osmosis concentrated saline are concentrated and desalt processing, and concentrated solution concentration reaches 6% or so, and fresh water is straight
Connect to take off to mix with reverse osmosis produced water to below 500mg/L and reach reuse standard reuse；Electrodialysis list is separated subsequently into a bivalence
Unit carries out sodium chloride to EDR concentrated waters and separates with sodium sulfate, isolates the very high sodium chloride of purity, steamed by MVR from EDR concentrated waters
Crystal product is sent out as sodium chloride Nacl, realizes that solid waste reduction is processed；Fresh water enters follow-up frequently pole-reversing electroosmosis system
(EDR) process；
Fresh water after one bivalence separation electrodialysis system (ED) enters EDR units again and is concentrated, and concentration reaches more than 10%,
Fresh water is directly taken off to be mixed with reverse osmosis produced water to below 500mg/L and reaches reuse standard reuse；
d）Final strong brine has two strands, and one is sodium chloride solution, sodium chloride content 19% or so, water yield 17T/H, separately
Silent partners is sodium chloride, sulphuric acid acid sodium and part COD mixed solutions, salinity about 10% or so, water yield 5T/H；
Sodium chloride solution directly arranges the MVT vaporising devices that a set for the treatment of capacity is 20 T/H, condensing crystallizing sodium chloride conduct
Nacl；Mixed liquor outside two is according to local meteorological condition and the principle of saving operating cost, big in summer high temperature evaporation capacity
Period, strong brine enter evaporation pond and carry out nature mummification；In the winter time the ice period and evaporation capacity little period, strong brine entrance is in addition
A set for the treatment of capacity is the MVT vaporising devices of 5 T/H.
In sewage water treatment method of the present invention：
Self-cleaning filter is set before ultrafiltration, is prevented pipeline and device structure, and follow-up film process is shielded；
Reverse osmosis concentrated saline is introduced into concentrated water processing unit, then carries out electric descaler, it is ensured that subsequent concentration procedures system is not
Fouling；
The V-type filter tank, filter and ultra filtration unit need to carry out backwash, have part to produce water as backwash water, and instead
Wash water is reprocessed after needing to collect；Wherein hyperfiltration reverse-rinsing water enters Treated sewage reusing list from pond, backwash water itself is produced after collecting
Unit's buffering pond；
Treated sewage reusing is always intake 1200m3/h（TDS=4000ppm）, produce can reuse middle water 1000m3/h（TDS=
500 ppm）, remaining 200 m3/h is back to sewage disposal system；Solid salinity carries out a point salt, wherein solid sodium chloride
3.2T/H, sodium chloride and sodium sulfate hybrid solid 0.48T/H；It is 87% to divide salt rate.
Original trade effluent zero-discharge technology thoroughly can not solve the problems, such as sewage discharge, original zero-discharge technology
Final mixed salt discharge can cause the destruction of surrounding enviroment, affect ecology, cause the waste of salt resource, in addition with country
Production requirement amount increases, and the discharge capacity of the solid-state mixed salt after zero-emission also increases year by year, therefore for the process of mixed salt is one
Part urgent problem.The present invention has drawn the advantage of Treated sewage reusing in original technique, carries out dirt using bi-membrane method to sewage
The near-zero release of water is reclaimed；For original solid mixed salt carries out the separating treatment of salt in the source of technique；Using membrane technology
One bivalence isolation technics and the combination of high temperature distillation crystallization technique, different salts are separated, accomplish resource reclaim.
The present invention has structure composition rationally, easy to use and reliable, can be on the Treated sewage reusing of existing sewage disposal basis
On, the separating treatment of bi-membrane method salt is carried out, is realized that the near-zero release of sewage is reclaimed, is reduced to periphery eco-environmental impact and destruction
The features such as.
Description of the drawings
Fig. 1 is the mixed salt process chart of prior art.
Fig. 2 is of the present invention point of salt process chart.
Fig. 3 is electrodialyzer operation principle schematic diagram of the present invention.
Fig. 4 is Treated sewage reusing flow process of the present invention and material balance figure.
Specific embodiment
Below in conjunction with accompanying drawing, the present invention will be described in detail：Shown in Fig. 2, at a kind of trade effluent of the present invention
Reason system, it include a regulating reservoir 21 for collecting sewage, the pretreatment system being mutually then mainly made up of V-type filter tank 22 thereafter,
Mutually then one-level " ultrafiltration+reverse osmosiss " system 23 after the pretreatment system, in one-level " ultrafiltration+reverse osmosiss " system 23
After ultra filtration unit 24 and reverse osmosis units 25, reverse osmosis concentrated water enters at least one-level frequently pole-reversing electric osmose being attached thereto all the way
Analysis system 26 is simultaneously concentrated, and another road fresh water connects reuse pool 27 or the reuse water outlet pipe phase with reuse pool 27
Logical；An at least self-cleaning filter 28 is also serially connected between V-type filter tank 22 and ultra filtration unit 24；Shown in figure, the reverse osmosis
Reverse osmosis concentrated water after unit 25 is introduced into a RO concentrated waters pond 29 thoroughly, enters back into described one-level frequently pole-reversing electroosmosis system
26.
Concentrated water outlet after frequently pole-reversing electroosmosis system 26 of the present invention is connected to one and monovalence and divalent salts can be entered
The detached bivalence of row separates electrodialysis system 30, and a bivalence separates that electrodialysis system 30 is connected behind to have a pair of monovalent salts to enter
Row concentration and recovery the MVR vaporising devices 31 for obtaining crystallizing sodium chloride, and a bivalence separates electrodialysis system below light
Water out is connected with least another grade frequently pole-reversing electroosmosis system 32, the fresh water after the frequently pole-reversing electroosmosis system
Outlet connection reuse pool 27, concentrated water outlet are connected to another MVR vaporising devices 33 that can obtain sulfate crystal salt.
Further embodiment of the present invention is：Described reverse osmosis concentrated water all the way enter being attached thereto, connect successively
Two grades of frequently pole-reversing electroosmosis systems 26,34 are simultaneously concentrated, wherein dense after previous stage frequently pole-reversing electroosmosis system 26
Water out is connected to a described bivalence and separates electrodialysis system 30, and water outlet is connected to rear stage frequently pole-reversing electroosmosis system
34, and the water outlet connection reuse pool 27 or light with the reuse of reuse pool by rear stage frequently pole-reversing electroosmosis system 34
Water outlet pipe is communicated, and concentrated water outlet is connected on the MVR vaporising devices 33 for accessing sulfate crystal salt.
The present invention to embodiment is further：A described bivalence separates the water outlet below of electrodialysis system 30 and connects
It is connected to the another two grades of frequently pole-reversing electroosmosis systems 32,35 for connecting successively, wherein previous stage frequently pole-reversing electroosmosis system 32
Water outlet is connected on rear stage frequently pole-reversing electroosmosis system 35, and the fresh water of rear stage frequently pole-reversing electroosmosis system 35
Outlet connection reuse pool 27 is communicated with the reuse water outlet pipe of reuse pool；And described two grades connect successively frequently falls
The concentrated water outlet below of pole electrodialysis system 32,35 is connected on the MVR vaporising devices for accessing sulfate crystal salt respectively
33.
Shown in Fig. 3, frequently pole-reversing electroosmosis system of the present invention is mainly made up of an electrodialyzer, the electrodialyzer
Mainly it is made up of anions and canons exchange membrane, dividing plate and electrode, the passage that the compartment that the dividing plate is constituted is passed through for liquid stream, and light
The compartment that water is passed through is desalting chamber, and the compartment that concentrated water is passed through is enriched chamber；
A described bivalence separates electrodialysis system and is mainly on the basis of existing electrodialyzer, can reach one from one
The detached monovalent ion exchange membrane of valency divalent ion, and on the female die surface of monovalent ion exchange membrane with one layer very thin sun from
The charged layer of son, has one layer of very thin highly cross-linked film on anode membrane surface；
Described MVR vaporising devices are mainly by feed pump, at least two grades preheaters, heater, vapour liquid separators of series connection
Composition is sequentially connected, material carries out solid-liquid separation through the centrifuge being pumped into that discharges thereafter, arranges in the heater to separator
After the indirect steam for going out is admitted to centrifugation vapour compression machine compression, steam is re-fed into heater heated material, in heating thing
During material, the steam condensate (SC) of generation has condensate pump to discharge.
Shown in Fig. 4, a kind of sewage water treatment method of the Industrial sewage treatment system of the present invention, the sewage disposal
Method comprises the steps：
a）Pretreatment, each stock sewage initially enter regulating reservoir, and homogenizing is lifted into V-type filter tank after measuring, and remove through sand filtration
Float and colloidal material in sewage；
b）Sand filtration water outlet enters " ultrafiltration+reverse osmosiss " system, and the main effect of ultra filtration unit is separating suspension macromole
Colloid, glutinous mud, microorganism, Organic substance etc. can cause dirty stifled impurity, reverse osmosis unit to carry out desalting processing to reverse osmosis membrane；
c）Reverse osmosis concentrated saline enter "+one bivalence of frequently pole-reversing electroosmosis system (EDR) separate electrodialysis system (ED)+
The combined treatment unit that frequently pole-reversing electroosmosis system (EDR)+MVR vaporising devices " are constituted, wherein：
The advanced EDR units of reverse osmosis concentrated saline are concentrated and desalt processing, and concentrated solution concentration reaches 6% or so, and fresh water is straight
Connect to take off to mix with reverse osmosis produced water to below 500mg/L and reach reuse standard reuse；Electrodialysis list is separated subsequently into a bivalence
Unit carries out sodium chloride to EDR concentrated waters and separates with sodium sulfate, isolates the very high sodium chloride of purity, steamed by MVR from EDR concentrated waters
Crystal product is sent out as sodium chloride Nacl, realizes that solid waste reduction is processed；Fresh water enters follow-up frequently pole-reversing electroosmosis system
(EDR) process；
Fresh water after one bivalence separation electrodialysis system (ED) enters EDR units again and is concentrated, and concentration reaches more than 10%,
Fresh water is directly taken off to be mixed with reverse osmosis produced water to below 500mg/L and reaches reuse standard reuse；
d）Final strong brine has two strands, and one is sodium chloride solution, sodium chloride content 19% or so, water yield 17T/H, separately
Silent partners is sodium chloride, sulphuric acid acid sodium and part COD mixed solutions, salinity about 10% or so, water yield 5T/H；
Sodium chloride solution directly arranges the MVT vaporising devices that a set for the treatment of capacity is 20 T/H, condensing crystallizing sodium chloride conduct
Nacl；Mixed liquor outside two is according to local meteorological condition and the principle of saving operating cost, big in summer high temperature evaporation capacity
Period, strong brine enter evaporation pond and carry out nature mummification；In the winter time the ice period and evaporation capacity little period, strong brine entrance is in addition
A set for the treatment of capacity is the MVT vaporising devices of 5 T/H.
In sewage water treatment method of the present invention：
Self-cleaning filter is set before ultrafiltration, is prevented pipeline and device structure, and follow-up film process is shielded；
Reverse osmosis concentrated saline is introduced into concentrated water processing unit, then carries out electric descaler, it is ensured that subsequent concentration procedures system is not
Fouling；
The V-type filter tank, filter and ultra filtration unit need to carry out backwash, have part to produce water as backwash water, and instead
Wash water is reprocessed after needing to collect；Wherein hyperfiltration reverse-rinsing water enters Treated sewage reusing list from pond, backwash water itself is produced after collecting
Unit's buffering pond；
Treated sewage reusing is always intake 1200m3/h（TDS=4000ppm）, produce can reuse middle water 1000m3/h（TDS=
500 ppm）, remaining 200 m3/h is back to sewage disposal system；Solid salinity carries out a point salt, wherein solid sodium chloride
3.2T/H, sodium chloride and sodium sulfate hybrid solid 0.48T/H；It is 87% to divide salt rate.
Embodiment：
Shown in Fig. 2, the sewage disposal system that the present invention is adopted mainly includes：" ultrafiltration+reverse osmosiss+frequently pole-reversing electroosmosis
+ one bivalence of system (EDR) separates electrodialysis system (ED)+frequently pole-reversing electroosmosis system (EDR)+MVR vaporising devices "
Water unit regulating reservoir 21 in sewage-treatment plant water outlet entrance, homogenizing is lifted into V-type filter tank 22 after measuring, through sand
Filter off except the float in sewage and colloidal material, in V-type filter tank, filtrate adopts special filtrate, with removal cobalt and manganese
Function.Sand filtration water outlet enters " ultrafiltration+reverse osmosiss++ one bivalence of frequently pole-reversing electroosmosis system (EDR) separation electrodialysis system
(ED)+frequently pole-reversing electroosmosis system (EDR)+MVR vaporising devices ", the main effect of ultra filtration unit 24 is that separating suspension is big
Molecular colloid, glutinous mud, microorganism, Organic substance etc. can cause dirty stifled impurity to reverse osmosis membrane；Reverse osmosis units 25 are taken off
Salt treatment, it is ensured that water quality reaches reuse requirement；Reverse osmosis concentrated water by frequently pole-reversing electroosmosis system (EDR) concentrate, fresh water with
RO mixing of fresh water reaches reuse requirement；Frequently pole-reversing electroosmosis system (EDR) concentrated water separates electrodialysis system through a bivalence again
(ED) monovalence and divalent salts are carried out separating and concentration and recovery being carried out to monovalent salt becoming Nacl, realize solid waste reduction；
ED systems fresh water enters frequently pole-reversing electroosmosis system (EDR) again, and fresh water reaches reuse requirement with RO mixing of fresh water, and concentrated water is concentrated
Reduce the water yield.Electric descaler and self-cleaning filter are set before ultrafiltration, pipeline and device structure are prevented, and follow-up film process is risen
Protective effect., from each self-produced pond, backwash water is entered after collecting for V-type filter tank, self-cleaning filter backwash water, hyperfiltration reverse-rinsing water
Buffering pond, is promoted to after highly dense depositing reservoir is processed and enters recycled treated water solution pond leading portion.
One phase, the second stage of Treated sewage reusing reverse osmosis concentrated water enter " hydrolysis acidification+catalytic oxidation " biochemical treatment unit, go eliminating water
The materials such as the COD that is concentrated in matter, ammonia nitrogen, provide guarantee for subsequent film processing unit.After biochemistry, water outlet enters " ultrafiltration+reverse osmosis
Thoroughly++ one bivalence of frequently pole-reversing electroosmosis system (EDR) separation electrodialysis system (ED)+frequently pole-reversing electroosmosis system (EDR)+
MVR vaporising devices ", the main effect of ultrafiltration apparatus are the energy such as separating suspension macromolecular colloid, glutinous mud, microorganism, Organic substance
The enough impurity for causing dirt stifled to reverse osmosis membrane, reverse osmosis unit carry out desalting processing, it is ensured that water quality reaches reuse requirement.Before ultrafiltration
Electric descaler and self-cleaning filter are set, are prevented pipeline and device structure, and follow-up film process is shielded.Ultrafiltration is anti-
Wash water enters Treated sewage reusing unit buffering pond and follow-up high dense settling pond from pond, backwash water itself is produced after collecting
After process, two grades of hydrolytic tanks of biochemical wastewater treatment unit are entered.Middle water concentrated water biochemical treatment unit sludge enters sewage disposal
Sludge concentration tank is processed.
Final strong brine has two strands, and one is sodium chloride solution, sodium chloride content 19% or so, in addition stock be sodium chloride,
Sodium sulfate and part COD mixed solutions, salinity about 10% or so.Sodium chloride solution directly arranges MVT vaporising devices, concentration knot
Brilliant sodium chloride is used as Nacl.Mixed liquor outside two is according to local meteorological condition and the principle of saving operating cost, high in summer
The warm evaporation capacity big period, strong brine enters evaporation pond and carries out nature mummification；The ice period and evaporation capacity little period, dense in the winter time
Saline enters other set MVT vaporising device.
From itself producing pond, backwash water enters recycle-water unit buffering pond and follow-up to hyperfiltration reverse-rinsing water after collecting
After high dense settling pond process, two grades of hydrolytic tanks of biochemical wastewater treatment unit are entered.Middle water concentrated water biochemical treatment unit sludge
Enter sewage disposal sludge concentration tank to be processed.
As the units such as reuse water treatment facilities V-type filter tank, filter, ultrafiltration need to carry out backwash, there is part to produce water and do
For backwash water, reprocess after backwash water needs collection, therefore reuse water device is designed according to the internal backwash water yield.
In Fig. 2, each unit structure composition of system composition is as follows：
1）V-type filter tank is a kind of form of rapid filter, and its groove shape of intaking is in the shape of the letter V.Treat drainage by total canal of intaking through entering
After water valve and square hole, overflow across crest of weir and enter the V-groove that do not had by water logging to be filtered through side opening again, respectively through the uniform distributing hole of bottom land and
V-groove weir enters filter tank.The water after filter filtered by homogeneous filtering material filtering layer flows into bottom space through strainer head, imports gas by square hole
Water distribution pipe canal, then flow into the filter tank discharge bay below the equipment room of V-type filter tank.
2）The ultra-filtration process of ultra filtration unit 24 is generally appreciated that or the screening process related to membrane aperture.It is between nanofiltration
And microfiltration between, it is 500 500000 or so that domain of definition is molecular cut off, 2 nanometers -100 nanometers of corresponding pore size point.
Under pressure, when water flows through film surface, only allow water, inorganic salt and small-molecule substance to pass through film, and prevent in water
Float, colloid, the macromolecular substances such as protein microorganism pass through, to reach the purpose of purification separation.Ultrafiltration is used as one kind
The film penetrant method isolation technics that dissolving can be purified, separated or be concentrated, application surface is widely.
Ultrafiltration can be divided into the types such as doughnut, tubular type, rolling, plank frame.
The material of ultrafilter membrane is a lot, and relatively common in the market is polyether sulfone（PES）And polysulfones（PS）, polyvinylidene fluoride
Alkene（PVDF）Three kinds.
The ultrafiltration method of operation can be divided into dead-end filtration and cross flow filter.
Dead-end filtration：Dead-end filtration is also known as grossflow filtration.When ultrafiltration, to enter aqueous suspension, turbidity and COD value low, as clean
The water quality such as subsoil water, spring water, or ultrafiltration pre-treatment is stricter, filters if any sand filter, more medium filter etc., ultrafiltration can be pressed
According to full stream/dead end filtration mode operation.This filtered model is similar with traditional filtering, and raw water enters ultrafiltration membrane pipe, and 100% through super
Membrane filtration is from membrane tube filtrate side output.The macromolecular particle thing that dammed by ultrafilter membrane, colloid etc. ultrafiltration timing backwash,
Discharge from ultrafiltration membrane pipe in fast punching and Process of Chemical Cleaning.
Cross flow filter：Float and can operate by dead end filtration mode during relatively low colloidal content in typically fooled raw water.
Raw water enters membrane tube with relatively low cross-flow flow velocity, and condensed water is discharged from membrane tube other end with certain proportion.Produce water to filter in membrane tube
Liquid side output, the operation response rate are typically 92-99%, this by microgranule in raw water concentration determining.
Ultrafiltration adopts external pressing type hollow fibrous membrane, 100,000 dalton of molecular weight of damming, and contamination resistance is strong, chemically stable
Property the good film of good, mechanical strength, film service life more than 5 years, often set ultrafiltration apparatus cleared-out power and effluent characteristics constant.
Ultrafiltration system and traditional handicraft（Chemical dosing+more medium filter+charcoal filter）Compare with following excellent
Point：
Effluent quality is increased substantially, and can remove most float and larger molecular organicses.General ultrafiltration system
Pollution index SDI≤3 of water outlet, and conventional pretreatment produces water SDI<5
Stable effluent quality, does not change with the change of time and influent quality.
The impurity such as float in raw water, Organic substance and colloid can be effectively removed, extends the use of rear class counter-infiltration system
Life-span.
Manipulation strength mitigates significantly, easily realizes Automatic Control.
Greatly save floor space.
3）Reverse osmosis units 25：Reverse osmosis units and aid system are fully automatic operation, and scope of supply is included from ensuring public security
Filter water intaking valve begin to reverse osmosis freshwater outlet valve stop between all devices and relevant auxiliary equipment, mainly include：
Reverse osmosis membrane assembly, including reverse-osmosis membrane element, pressure vessel, mating valve；
Connecting pipe, valve, adnexa；
Monitoring and Controlling instrument, signal transmitting device and local control panel needed for process system；
Cartridge filter（Including apparatus body, valve, meter and adnexa etc.）；
High-pressure pump（Including high-pressure pump, terminal valve, pressure gauge, pressure switch etc.）；
Reducing agent, antisludging agent medicine system, reverse osmosiss chemical cleaning system（Public with ultrafiltration system）, tubular type medicine mixing
The auxiliary equipment such as device.
Reverse osmosiss are to make the solvent in solution pass through reverse osmosis membrane with certain pressure（Or claim semipermeable membrane）Separate.Cause
In opposite direction with naturally osmotic for it, therefore claim reverse osmosiss.According to the different osmotic of various materials, so that it may so that more than infiltration
The hyperfiltration of pressure reaches the purpose of separation, extraction, purification and concentration.
Reverse osmosis unit（Abbreviation RO devices）Belong to key equipment in desalting system.RO by raw water a part along with
The vertical direction of film will be concentrated on film surface by film, the salt and colloidal substance in water, and remaining a part of raw water is along flat with film
The material of concentration is taken away by capable direction, self-cleaning in running.The water flux of membrane component is bigger, and the response rate gets over Gao Zeqi
The degree of film surface concentration is higher, and due to inspissation, the material solubility at film surface is different from material concentration in main body current,
Produce concentration polarization phenomenon.Concentration polarization can make the concentration of film surface salt high, increase the osmotic pressure of film, cause salt transmitance to increase
Greatly, it is that the pressure for improving feedwater needs many consumed energies, now should be recovered using the method for cleaning.
RO film chemical cleaning technologies include rinsing, soak, circulate three processes：
Wherein flushing process is：In the Process of Chemical Cleaning of RO systems, two to be carried out and rinse washed journey：Chemical cleaning is opened
The flushing during beginning can effectively scrubbing membrane surface dirt；Flushing after the completion of Chemical cleaning can effectively remove Chemical cleaning
Liquid, the quality for product water provide necessary guarantee.
Immersion process is：Immersion is the key of RO cleaning systems.It can make chemical liquids, with pollutant, correspondingization occur
Reaction is learned, pollutant can be allowed again to come off from the surface of film, be dissolved in chemical liquids and reached the purpose of Chemical cleaning.
Cyclic process is：Circulation is the main process of RO cleaning systems.During being somebody's turn to do, chemical liquids are occurred with film interior molecules
The Dynamic Contact of physics, the reaction such as further permeates, rubs, shearing, so as to reach the purpose of Chemical cleaning.
Cleaning formula of liquid：The pollution of RO films or obstruction are the shadows by conditions such as the species of its pollutant, the materials of film itself
Ring.For different pollutions, the medicament of its Chemical cleaning is different.
4）Electrodialysis cell, as shown in Figure 3：Dialysis refers to phenomenon of the solute by semipermeable membrane in solution.Natural dialysis
Motive force is the concentration difference of semipermeable membrane both sides solute.In the presence of DC electric field, ion permeable selective ion exchange membrane
Phenomenon is referred to as electrodialysis.The research of electrodialytic technique starts from the Germany of 1903, and industrialization starts from the 1950's.Electrodialysis
Technology is suitable for water the industries such as oil, electronics, medicine, chemical industry, thermal power generation, food, medicated beer, beverage, printing and dyeing and application
Process.It is also applied for the concentration purification special separation such as aminoacid, oligomeric xylose, protein, milk, glycine betaine, medicine intermediate
Field.
Ion exchange membrane is the thin film to ion with selective penetrated property being made up of macromolecular material.Mainly divide cation
Exchange membrane（CM, abbreviation anode membrane）And anion exchange membrane（AM, abbreviation cavity block）Two kinds.Anode membrane carries negative electricity due to film body fixed base
Charge ions, may be selected to pass through cation；Cavity block may be selected to pass through anion as film body fixed base is with positive charge ion.Sun
Film passes through cation, selective penetrated property of the cavity block through the performance referred to as film of anion.The most basic work of electrodialyzer process
Unit is referred to as film pair.One film is to constituting a desalting chamber and an enriched chamber.One practical electrodialyzer is by hundreds of films pair
Composition.
The critical piece of electrodialyzer is anions and canons exchange membrane, dividing plate and three part of electrode.Dividing plate constitute compartment be
The passage that liquid stream is passed through.The compartment that fresh water is passed through is desalting chamber, and the compartment that concentrated water is passed through is enriched chamber.If anions and canons are handed over
Change film to be alternately arranged with dense, diluted gasket, repeat to be superimposed, along with a pair of termination electrodes, just constitute a practical electrodialyzer.
If each system feed liquor of electrodialyzer is all NaCl solution, in the case of energization, the Na+ in fresh water compartment is migrated to cathode direction,
Cl- is migrated to anode direction, and Na+ is just moved in adjacent compartment through CM and AM respectively with Cl-.Such fresh water compartment
In NaCl solution concentration be just gradually lowered.NaCl solution concentration in adjacent compartments, i.e. concentrated water compartment accordingly gradually rises, from
Desalination solution and concentrated solution can continuously be just flowed out in electrodialyzer.Fresh water water circuit system, concentrated water water circuit system and pole water water
The liquid stream of road system is supplied by water pump, is not mutually mutually mixed, and makes which inside electrodialyzer by the cloth of particular design, water collection agencies
It is uniformly distributed, steady flow.From the alternating current of power supply network supply, rectified device is changed into unidirectional current, introduces electrodialyzer by electrode.
Through the electrochemical reaction on solution electrode interface, complete the process that ionic conduction is converted into by electronic conduction.Use clamping plate
The membrane stack part for tightening together is referred to as electrodialyzer.Electrodialyzer will be operated, it is necessary to have the auxiliary such as water pump, commutator to set
Standby, it is necessary to have into water pretreatment facility.Electrodialyzer and auxiliary equipment are collectively referred to as electrodialyzer device generally.
5）One bivalence separates electrodialysis system (ED) unit：Common cation exchange membrane, high-valence cationic relatively at a low price sun from
Sub preferential transmission.This characteristic, needs the application that monovalence divalent ion is separated to be very unfavorable for some.Therefore
Urgent requirement is proposed to the development of the special permselectivity membrane of monovalent cation.The method of production of special permselectivity membrane
A lot, succeeded at first is to carry out surface modification treatment to ion exchange membrane.Japan is walked in the world in this technology
Foremost.
My company passes through technology transfer, using Japanese imported with original packaging monovalent ion exchange membrane, can reach and separates monovalence bivalence
The purpose of ion.With the charged layer of one layer of very thin cation on the ion exchange membrane anode membrane surface, on female die surface, have one
The very thin highly cross-linked layer of layer.There is membrane resistance low compared to conventional ion exchange membrane（Film is thin）, rejection height, concentration rate height etc.
Feature.
6）MVR vaporising devices 31,33：MVR is the abbreviation of steam mechanical recompression.MVR is to re-use its own
The energy of the indirect steam of generation, so that reduce a power-saving technology of the demand of the energy to external world.Early in the sixties, foreign countries are just
The technology is used for the fields such as chemical industry, food, medicine, desalinization and sewage disposal successfully.In MVR vapo(u)rization systems,
The indirect steam that evaporation is produced is compressed through compressor, converts electrical current into into heat energy, improves the temperature of steam, pressure, and heat content increases
Plus, the heating chamber of vaporizer is then reentered as thermal source, makes full use of the latent heat of steam, make feed liquid maintain fluidized state,
And heat steam itself and be then condensed into water.Need in whole evaporation process little with raw quantity of steam.Make steam originally to be discarded
It is fully utilized, improves the thermal efficiency, the economy for giving birth to steam in theory is imitated equivalent to the 30 of multiple-effect evaporation.
The flow process of MVR vaporising devices is：
（1）Raw material preheating：Material storing is pumped into one-level preheating (plate type heat exchanger) by charging, in plate in compensator
The gas that do not condense that material is discharged with heater in formula heat exchanger carries out heat exchange, and material heats up on 5 DEG C of left sides under vacuum
Right.Then material is delivered to two grades of preheaters (plate type heat exchanger), condensed water does not enter material with heater in the plate type heat exchanger
Row heat exchange, reclaims condensation water residual heat, makes condensate temperature be down to less than 50 DEG C, then drain into condensate water pot.Material continue into
Enter three-level preheater (plate type heat exchanger), with steam preheating on 80 DEG C, enter back into heater.
（2）Material evaporation is concentrated：Material enters heater heating, subsequently into separator gas-liquid separation, after concentration
Material is pumped to centrifuge by discharging makes solid separate with liquid.
（3）MVR systems：The indirect steam that heater is discharged to separator（Temperature is at 80 DEG C）Deliver to centrifugation vapour compression machine
Compression, temperature can be increased to 95 DEG C, and the steam after compression is re-fed into heater heated material, during heated material, produce
Raw steam condensate (SC) is discharged by condensate pump.
The present invention can also adopt multi-effect evaporating device to replace above-mentioned MVR vaporising devices in the particular embodiment.
Invention employs a bivalence and separates electrodialysis system, and system carries out separating and to monovalence to monovalence and divalent salts
Salt carries out concentration and recovery and becomes Nacl, realizes solid waste reduction.By original mixed salt, need to carry out to endanger useless process, become in order to
The sodium chloride needed in industry and sodium sulfate, it is achieved that turn waste into wealth, and real achieve zero-discharge technology.
Claims (6)
1. a kind of Industrial sewage treatment system, it includes a regulating reservoir for collecting sewage, thereafter mutually then mainly by V-type filter tank structure
Into pretreatment system, mutually then one-level " ultrafiltration+reverse osmosiss " system after the pretreatment system, it is characterised in that the one-level
After reverse osmosis units in " ultrafiltration+reverse osmosiss " system, at least one-level that reverse osmosis concentrated water entrance is attached thereto all the way is frequent
Pole-reversing electroosmosis system is simultaneously concentrated, and another road fresh water connects reuse pool or the reuse water outlet pipe phase with reuse pool
Logical；Concentrated water outlet after the frequently pole-reversing electroosmosis system is connected to one can carry out a detached bivalence to monovalence and divalent salts
Separate electrodialysis system, the bivalence separates that electrodialysis system is connected behind there are a pair of monovalent salts to carry out concentration and recovery and tied
The MVR vaporising devices of brilliant sodium chloride, and a bivalence separate electrodialysis system water outlet below be connected with least another
Level frequently pole-reversing electroosmosis system, the water outlet connection reuse pool after the frequently pole-reversing electroosmosis system, concentrated water
Outlet is connected to another MVR vaporising devices that can obtain sulfate crystal salt.
2. Industrial sewage treatment system according to claim 1, it is characterised in that described reverse osmosis concentrated water all the way is entered
Two grades of frequently pole-reversing electroosmosis systems being attached thereto, connecting successively are simultaneously concentrated, wherein previous stage frequently pole-reversing electric osmose
Concentrated water outlet after analysis system is connected to a described bivalence and separates electrodialysis system, and water outlet is connected to rear stage and frequently falls
Pole electrodialysis system, and by rear stage frequently pole-reversing electroosmosis system water outlet connection reuse pool or with reuse pool
Reuse water outlet pipe is communicated, and concentrated water outlet is connected on the MVR vaporising devices for accessing sulfate crystal salt.
3. Industrial sewage treatment system according to claim 1 and 2, it is characterised in that a described bivalence separates electrodialysis
System water outlet below is connected with the another two grades of frequently pole-reversing electroosmosis systems for connecting successively, wherein previous stage frequently pole-reversing
The water outlet of electrodialysis system is connected on rear stage frequently pole-reversing electroosmosis system, and rear stage frequently pole-reversing electroosmosis system
The water outlet connection reuse pool of system is communicated with the reuse water outlet pipe of reuse pool；And described two grades connect successively
The concentrated water outlet below of frequently pole-reversing electroosmosis system is connected on the MVR evaporation dresses for accessing sulfate crystal salt respectively
Put.
4. Industrial sewage treatment system according to claim 3, it is characterised in that described frequently pole-reversing electroosmosis system
Mainly it is made up of an electrodialyzer, the electrodialyzer is mainly made up of anions and canons exchange membrane, dividing plate and electrode, the dividing plate
The compartment of composition is the passage that liquid stream is passed through, and the compartment that fresh water is passed through is desalting chamber, and the compartment that concentrated water is passed through is enriched chamber；Institute
The bivalence that states separates electrodialysis system and is mainly on the basis of existing electrodialyzer, can reach monovalence divalent ion from one
Detached monovalent ion exchange membrane, and with the charged layer of one layer of very thin cation on the female die surface of monovalent ion exchange membrane,
Have one layer of very thin highly cross-linked film on anode membrane surface；Described MVR vaporising devices mainly by feed pump, series connection at least two
Level preheater, heater, vapour liquid separator are sequentially connected composition, and material carries out solid-liquid point through the centrifuge being pumped into that discharges thereafter
From, after the indirect steam that the heater to separator is discharged is admitted to centrifugation vapour compression machine compression, steam is sent again
Enter heater heated material, during heated material, the steam condensate (SC) of generation has condensate pump to discharge.
5. the sewage water treatment method of Industrial sewage treatment system described in a kind of utilization claim 1 or 2 or 3 or 4, it is characterised in that
Described sewage water treatment method comprises the steps：
a）Pretreatment, each stock sewage initially enter regulating reservoir, and homogenizing is lifted into V-type filter tank after measuring, and remove sewage through sand filtration
In float and colloidal material；
b）Sand filtration water outlet enter " ultrafiltration+reverse osmosiss " system, the main effect of ultra filtration unit be separating suspension macromolecular colloid,
Glutinous mud, microorganism, Organic substance can cause dirty stifled impurity, reverse osmosis unit to carry out desalting processing to reverse osmosis membrane；
c）Reverse osmosis concentrated saline enters "+one bivalence of frequently pole-reversing electroosmosis system (EDR) separation electrodialysis system (ED)+frequent
The combined treatment unit that pole-reversing electroosmosis system (EDR)+MVR vaporising devices " are constituted, wherein：
The advanced EDR units of reverse osmosis concentrated saline are concentrated and desalt processing, and concentrated solution concentration reaches 6% or so, and fresh water directly takes off
Mix with reverse osmosis produced water to below 500mg/L and reach reuse standard reuse；Electrodialysis cell pair is separated subsequently into a bivalence
EDR concentrated waters carry out sodium chloride and separate with sodium sulfate, isolate the very high sodium chloride of purity from EDR concentrated waters, by MVR evaporation knots
As sodium chloride Nacl, brilliant finished product realizes that solid waste reduction is processed；Fresh water enters follow-up frequently pole-reversing electroosmosis system (EDR) place
Reason；Fresh water after one bivalence separation electrodialysis system (ED) enters EDR units again and is concentrated, and concentration reaches more than 10%, and fresh water is straight
Connect to take off to mix with reverse osmosis produced water to below 500mg/L and reach reuse standard reuse；
d）Final strong brine has two strands, and one is sodium chloride solution, sodium chloride content 19% or so, water yield 17T/H, other stock
For sodium chloride, sodium sulfate and part COD mixed solutions, salinity 10% or so, water yield 5T/H；Sodium chloride solution directly arranges one
MVT vaporising device of the set treating capacity for 20T/H, condensing crystallizing sodium chloride is used as Nacl；Mixed liquor outside two is according to working as ground vapour
As condition and the principle of saving operating cost, in the summer high temperature evaporation capacity big period, strong brine enters evaporation pond and carries out nature
Mummification；In the winter time the ice period and evaporation capacity little period, strong brine entrance other set treating capacity is the MVT evaporation dresses of 5 T/H
Put.
6. sewage water treatment method according to claim 5, it is characterised in that in described sewage water treatment method：Set before ultrafiltration
Self-cleaning filter is put, pipeline and equipment scaling is prevented, and follow-up film process is shielded；Reverse osmosis concentrated saline is introduced into
Concentrated water processing unit, then carry out electric descaler, it is ensured that subsequent concentration procedures system non-scaling；The V-type filter tank, filter and
Ultra filtration unit needs to carry out backwash, has part to produce water as backwash water, and reprocesses after backwash water needs to collect；Wherein ultrafiltration is anti-
Wash water enters Treated sewage reusing unit buffering pond from pond, backwash water itself is produced after collecting；Treated sewage reusing is always intake
1200m3/ h, TDS=4000ppm, produce can reuse middle water 1000m3/ h, TDS=500 ppm, remaining 200m3/ h is back to
Sewage disposal system；Solid salinity carries out a point salt, wherein solid sodium chloride 3.2T/H, sodium chloride and sodium sulfate hybrid solid
0.48T/H；It is 87% to divide salt rate.
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| CN107721033A (en) * | 2016-08-10 | 2018-02-23 | 通用电气公司 | The system and method for handling salt solution |
| CN107758939A (en) * | 2016-08-22 | 2018-03-06 | 中国石油化工股份有限公司 | A kind of recycling standard discharge method of sodium alkali desulfurization liquid |
| CN107183612A (en) * | 2017-04-28 | 2017-09-22 | 浙江沐源环境工程有限公司 | A kind of preparation method of hot pickled mustard tube |
| CN107055713B (en) * | 2017-05-18 | 2020-05-12 | 河北工业大学 | High-hardness salt-containing water concentration method based on monovalent cation selective electrodialysis |
| CN106977037A (en) * | 2017-06-08 | 2017-07-25 | 哈尔滨锅炉厂有限责任公司 | A kind of industrial wastewater treatment device and method |
| CN107324576A (en) * | 2017-08-11 | 2017-11-07 | 海斯坦普汽车组件（昆山）有限公司 | Phosphorus-contained wastewater treating method based on EDI systems |
| CN107381889A (en) * | 2017-08-14 | 2017-11-24 | 青海清循水处理技术推广中心 | A kind of circulating water treatment method |
| CN109650608A (en) * | 2017-10-12 | 2019-04-19 | 华东理工大学 | It is a kind of using chemical method-nanofiltration-it is reverse osmosis-electrodialysis integrate concentrated seawater softening and concentration technology |
| CN109650607A (en) * | 2017-10-12 | 2019-04-19 | 华东理工大学 | A kind of reverse osmosis integrated concentrated seawater softening of chemical method-electrodialysis-and concentration technology |
| CN109205902B (en) * | 2018-09-29 | 2024-05-28 | 温州市环境发展有限公司 | Industrial high-salt wastewater reverse osmosis waste heat recovery treatment system |
| EP3967663A4 (en) * | 2019-05-09 | 2022-12-28 | Investigaciones Forestales Bioforest S.A. | Method for recovering water and chemicals from plants for treating effluents from pulp and paper factories |
| CN113929249B (en) * | 2020-06-29 | 2024-01-09 | 宝山钢铁股份有限公司 | Cold rolling nanofiltration concentrated water zero discharge process and system |
| CN112661325A (en) * | 2021-01-13 | 2021-04-16 | 上海大学(浙江·嘉兴)新兴产业研究院 | Circulated formula's nanometer powder filters piece-rate system |
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