CN106241972A - Based on electrodialytic zero emission treatment of desulfured waste water and system - Google Patents
Based on electrodialytic zero emission treatment of desulfured waste water and system Download PDFInfo
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
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Abstract
The present invention relates to environmental project technical field of waste water processing, be specifically related to a kind of based on electrodialytic zero emission treatment of desulfured waste water and system.The inventive method film processing stage by by dense for electrodialysis water regulation distribute in bipolar membrane electrodialysis device and flue vaporising device, it is back to pretreatment by bipolar membrane electrodialysis device antacid alkaline and film processes, realize minimizing and the resource of waste water, electrodialysis fresh water is back to film and processes, improve the meeting rate of fresh water, decrease the dosing cost of pretreatment and the workload made up a prescription, reduce the desalination load of system and the load of system end evaporative crystallization on the whole.Effective regulation that the present invention is processed by system end, it is possible to the water quality and quantity change that reply power plant is different, it is ensured that whole system stable operation.This desulfurization wastewater treatment system realizes zero-emission, waste recycling can reach eco-friendly design requirement simultaneously, be with a wide range of applications.
Description
Technical field
The present invention relates to environmental project technical field of waste water processing, be specifically related to a kind of based on electrodialytic desulfurization wastewater zero
Discharge treatment method and system.
Background technology
Now with the raising of discharging standards, desulfurization wastewater zero discharge treatment also gradually spreads out enforcement.Existing de-
Sulfur waster water process generally comprises the softening pretreatment such as neutralization, precipitation, coagulation, neutralization and slurry dewatering process and (is added by desulfurization wastewater
Medicine coagulation clarification, removes major part hardness, basicity and float；Soften water outlet entrance filtration system and remove suspension further
Thing；Chemical reaction produce body refuse enter dewatering system desliming), membrance concentration process (use various types of film, carry out at concentration
Reason, obtains high salt concentrated solution) and evaporating, concentrating and crystallizing process, the concentrated solution after crystallization and crystal grain carry out solid-liquid separation, female
Liquid returns to stock solution pond or continues evaporative crystallization, and crystal carries out dehydrate, finally obtains purification water and carnallite.Above-mentioned process program
Feature be: improve float, heavy metal ion, hardness ions, the clearance of silicon ion, simultaneously by this partial contamination thing from
Ionic state evaporative crystallization is converted into solid state, separates discharge from waste water, reaches following effect: so that wastewater to reach standard is arranged
Put, waste water can be concentrated, carnallite discharge after evaporative crystallization.
But but have the disadvantage in that (1) due to the desulfurization waste water quality water yield change greatly, the high spy of salinity in waste water
Point, produces solid carnallite to the processing means of desulfurization wastewater, and carnallite complicated component cannot recycle, only as the useless place of danger
Reason.Moreover, owing to desulfurization system cost of investment is higher, owing to there is no limited can to make corresponding tune according to water quality and quantity change
The technique of joint so that desulfurization wastewater treatment system can not run steadily in the long term.(2) in desulfurization wastewater treatment system, there is pre-place
The reagent cost of reason is too high, and the secondary pollution of medicament is serious, and the end-o f-pipe-control load of processing system is excessive, it is impossible to complete to realize zero
Stable operation under emission request.(3) mainly use reverse osmosis to carry out high power in terms of film process and concentrate the recovery improving waste water
Rate, but operation hypertonia, be susceptible to danger.
Summary of the invention
For this reason, it may be necessary to provide a kind of significantly more efficient desulfurization wastewater innoxious and recycling treatment process, thus significantly
Improve operational efficiency, reduce operating cost, improve the waste water process process of Treated sewage reusing and system desalination, solve desulfurization wastewater zero
The requirement of discharge.
For achieving the above object, one of the technical solution used in the present invention be based on electrodialytic desulfurization wastewater zero-emission at
Reason method, comprises the following steps:
(1) power plant desulfurization waste water is removed the float in desulfurization wastewater, heavy metal, part by neutralization, flocculation sediment
Sulfate ion, it is thus achieved that clear liquor carry out pH readjustment by adding acid solution, the clear liquor after pH readjustment meets follow-up fine straining
The inflow requirement processed；
(2) clear liquor step (1) obtained adds softening chelating agen, then carries out fine straining process, goes deliming by fine straining
Ion, magnesium ion, control the SDI in clear liquor below 3, it is thus achieved that fine straining produce water meet subsequent film system water inlet want
Ask；
(3) fine straining step (2) obtained produces hydromining electrodialysis and carries out salt concentration desalination process, it is thus achieved that salinity is higher than
The dense water of electrodialysis of 15% and the producing water ratio electrodialysis fresh water higher than 60%；
(4) electrodialysis fresh water step (3) obtained is for other moisturizings of power plant, and dense for electrodialysis water is temporarily stored into dense water
In case, it is adjusted distributing to bipolar membrane electrodialysis process and flue evaporation process by the process water yield of desulfurization wastewater；
(5) during alkali liquor bipolar membrane electrodialysis process in step (4) produced and acid solution are back in step (1) respectively
With and pH readjustment in use；
(6) step (4) is separated out, with follow-up cigarette with the form of crystal salt by the dense water of electrodialysis of flue evaporation process
Electric precipitation in gas disposal traps in flyash, or adds cleaner unit in flue evaporates, and traps crystal salt, carries out resource
Utilize.
Further, the power plant desulfurization influent waste water flow in described step (1): 5-20m3/ h, calcium ion concentration is
500-2000mg/L, magnesium ion concentration is 3000-6000mg/L, sulfate radical 6000-12000mg/L, and chloride ion is 3000-
12000mg/L, pH value is 5.0-7.5.
Further, the fine straining of described step (2) processes and uses multi-medium filtering, the Ca of filtrate2+50mg/L, Mg2+?
50mg/L, pH=7.0, SDI 3；
Further, the electrodialysis plant in described step (3) carries out salt and concentrates in desalination process, and salt concentrates desalination module
Using many set homogeneous membrane electrodialyzers, carried out by one section of batch (-type) circular treatment of one-level, dense water conductivity reaches 150-
170mS/cm, fresh water electrical conductivity 10mS/cm.
Further, in described step (4), according to the water yield processed, automatically adjust the water operation of the dense water of electrodialysis, with
Process the dense water yield of electrodialysis of 1/20-1/5 of the water yield and enter that bipolar membrane electrodialysis produces alkali liquor, acid solution is back to the neutralization of pretreatment
Adjust back with pH；
Further, in described step (5), bipolar membrane electrodialysis processes alkali liquor and the acid solution of pH 3 of output pH 12.
Further, in described step (5), flue evaporation process uses bypass flue evaporation technology, takes the high temperature in flue
Flue gas carries out atomization and vaporization to waste water, and the crystal after evaporation and steam return in the flue of power plant with flue gas, at flue gas
Reason system is handled together.
To achieve these goals, another technical scheme that the present invention uses is based on electrodialytic desulfurization wastewater zero-emission
Processing system, pretreatment pool, soften pond, fine filter, electrodialyzer, fresh water collecting case, dense water collection tank, flue vaporising device,
Bipolar membrane electrodialysis device is connected with the entrance softening pond with the outlet of acid & alkali liquid recovery pond, described pretreatment pool, softens pond
Outlet is connected with the entrance of fine filter, and the outlet of fine filter is connected with the entrance of electrodialyzer, and the outlet of electrodialyzer divides
Be not connected with the entrance of fresh water collecting case and dense water collection tank, the outlet of described dense water collection tank respectively with bipolar membrane electrodialysis
Device is connected with the entrance of flue vaporising device, and the outlet of bipolar membrane electrodialysis device connects with the entrance of acid & alkali liquid recovery pond, acid
The outlet in recycle of alkali liquor pond connects with the entrance of pretreatment pool.
Further, also including chelating agen Scatula, the outlet of described chelating agen Scatula is connected with the entrance softening pond
Logical.This chelating agen forms small flco with the calcium and magnesium hardness ions of waste water, and the filtration with follow-up accurate filter coordinates, removing
Calcium and magnesium hardness ions in waste water.
Further, also include that cleaner unit, the entrance of described cleaner unit are connected with the outlet of flue vaporising device.
Further, described fine filter is more medium filter.
Further, also including PH regulating reservoir, the described entrance of PH regulating reservoir is connected with the outlet of pretreatment pool, described
The outlet of PH regulating reservoir is connected with the entrance softening pond.
Being different from prior art, technique scheme has the advantage that as follows:
1. the present invention passes through neutralization precipitation pretreatment+softening secondary filter technique, removes oil removal, heavy metal, sulfate radical
Ion, calcium ion, magnesium ion, control SDI below 3, meets the inflow requirement of follow-up electrodialysis process, farthest drops
Low index of membrane fouling, it is ensured that the operation steady in a long-term of electrodialysis process.
2. the present invention is in the electrodialysis process stage by the way of intermittent cycle processes, and reduces electrodialytic equipment
This, improve electrodialytic service efficiency and salt concentrates the performance desalinated, and makes electrodialytic dense water conductivity reach 150-170mS/
Cm, electrodialysis fresh water electrical conductivity 10mS/cm.
3. the present invention uses bipolar membrane electrodialysis+flue evaporation technology to carry out group in the technique that water dense to electrodialysis processes
Close, carry out the control of bipolar membrane electrodialysis water dense to electrodialysis antacid alkali by processing the water yield, make the acid & alkali liquid prepared just full
Foot pretreating process adds the use that alkali neutralizes, pH adjusts back, improves the safety that system is run, and decrease pretreating process
Dosing cost and the workload made up a prescription, also reduce the desalination load of system and the load of system flue evaporation on the whole.
4. the present invention is by the process combination of bipolar membrane electrodialysis+flue evaporation, improves the ability of end-o f-pipe-control, change with
Toward single end-o f-pipe-control mode, it is to avoid make whole system out of service because end-o f-pipe-control breaks down.At system end
Effective regulation of reason, it is possible to reply power plant different quality water yield change, it is ensured that whole system stable operation.This desulfurization wastewater processes
System realizes zero-emission, can utilize simultaneously the waste water of generation produce carry out acid solution, alkali liquor carries out reuse, reaches eco-friendly
Design requirement, is with a wide range of applications.
Accompanying drawing explanation
Fig. 1 is present invention flow chart based on electrodialytic zero emission treatment of desulfured waste water.
Fig. 2 is present invention structure chart based on electrodialytic desulfurization wastewater zero discharge treatment device.
Detailed description of the invention
By describing the technology contents of technical scheme, structural feature in detail, being realized purpose and effect, below in conjunction with concrete real
Execute example and coordinate accompanying drawing to be explained in detail.
With reference to shown in Fig. 1, the present invention, based on electrodialytic zero emission treatment of desulfured waste water, comprises the following steps:
1. by power plant desulfurization waste water by neutralizing, flocculation sediment remove the float in desulfurization wastewater, heavy metal, part
Sulfate ion, it is thus achieved that clear liquor carry out pH readjustment by adding acid solution, the clear liquor after pH readjustment meets at follow-up fine straining
The inflow requirement of reason；
2. the clear liquor that step 1. obtained adds and softens chelating agen, then carries out fine straining process, by fine straining go deliming from
Son, magnesium ion, control the SDI in clear liquor below 3, it is thus achieved that fine straining produce water and meet the inflow requirement of subsequent film system；
3. fine straining step 2. obtained produces hydromining electrodialysis and carries out salt concentration desalination process, it is thus achieved that salinity is higher than 15%
The dense water of electrodialysis and producing water ratio higher than 60% electrodialysis fresh water；
4. electrodialysis fresh water step 3. obtained is used for other moisturizings of power plant, and dense for electrodialysis water is temporarily stored into dense water tank
In, it is adjusted distributing to bipolar membrane electrodialysis process and flue evaporation process by the process water yield of desulfurization wastewater；
5. by step, 4. middle bipolar membrane electrodialysis processes the alkali liquor produced and acid solution is back to the neutralization in step (1) respectively
And pH readjustment uses；
6. step 4. in separated out, with follow-up flue gas with the form of crystal salt by the dense water of electrodialysis of flue evaporation process
Electric precipitation in process traps in flyash, or adds cleaner unit in flue evaporates, and traps crystal salt, carries out resource profit
With.
Power plant desulfurization influent waste water flow in described step (1): 5-20m3/ h, calcium ion concentration is 500-2000mg/
L, magnesium ion concentration is 3000-6000mg/L, sulfate radical 6000-12000mg/L, and chloride ion is 3000-12000mg/L, pH value
For 5.0-7.5.
Described step fine straining 1. processes and uses multi-medium filtering, the Ca of filtrate2+50mg/L, Mg2+50mg/L, pH=
7.0, SDI 3；
Described step 3. in electrodialysis plant carry out salt and concentrate during desalination processes, salt concentrates desalination module and uses many sets all
Phase EDBM device, is carried out by one section of batch (-type) circular treatment of one-level, and dense water conductivity reaches 150-170mS/cm, fresh water electricity
Conductance 10mS/cm.
Described step 4. in, according to the water yield processed, automatically adjust the water operation of the dense water of electrodialysis, to process the water yield
The dense water yield of electrodialysis of 1/20-1/5 enters that bipolar membrane electrodialysis produces alkali liquor, acid solution is back to the neutralization of pretreatment and adjusts back with pH；
Described step 5. in, bipolar membrane electrodialysis processes the alkali liquor of output pH 12 and the acid solution of pH 3.
Described step 5. middle flue evaporation process uses bypass flue evaporation technology, takes the high-temperature flue gas in flue to waste water
Carrying out atomization and vaporization, the crystal after evaporation and steam return in the flue of power plant with flue gas, with smoke processing system in the lump
Process.
With reference to shown in Fig. 2, based on electrodialytic desulfurization wastewater zero-discharge treatment system, pretreatment pool 1, soften pond 2, be situated between more
Matter precision fine filter 3, electrodialyzer 4, fresh water collecting case 5, dense water collection tank 6, flue vaporising device 7, bipolar membrane electrodialysis device 8
Neutralization pond and flocculation sedimentation tank, the outlet of described pretreatment pool 1 and softening is included with acid & alkali liquid recovery pond 9, described pretreatment pool 1
The entrance in pond 2 is connected, and the outlet softening pond 2 is connected with the entrance of multimedium precision fine filter 3, multimedium precision fine filter
The outlet of 3 is connected with the entrance of electrodialyzer 4, the outlet of electrodialyzer 4 respectively with fresh water collecting case 5 and dense water collection tank 6
Entrance be connected, the outlet of described dense water collection tank 6 respectively with bipolar membrane electrodialysis device 8 and the entrance of flue vaporising device 7
Being connected, the outlet of bipolar membrane electrodialysis device 8 connects with the entrance of acid & alkali liquid recovery pond 9, and the outlet of acid & alkali liquid recovery pond 9 is with pre-
Process the entrance connection in pond 1.
Also including chelating agen Scatula (not illustrated), the outlet of described chelating agen Scatula is connected with the entrance softening pond 2
Logical.This chelating agen forms small flco with the calcium and magnesium hardness ions of waste water, and the filtration with follow-up accurate filter coordinates, removing
Calcium and magnesium hardness ions in waste water.
Also include that cleaner unit 10, the entrance of described cleaner unit 10 are connected with the outlet of flue vaporising device 7.Trapping crystallization
Salt, carries out recycling.
Described multimedium precision fine filter 3 is ceramic membrane porous filter.
Also include that PH regulating reservoir (not illustrated), the entrance of described PH regulating reservoir (not illustrated) are connected with the outlet of pretreatment pool
Logical, the outlet of described PH regulating reservoir (not illustrated) is connected with the entrance of fine filter.
Several detailed description of the invention is set forth below so that the method and system of the present invention is expanded on further.
Referring to Fig. 1 and Fig. 2, certain means of flue gas desulfurization of power plant waste water 500L that the present embodiment 1 uses, calcium ion concentration is
2000mg/L, magnesium ion concentration is 6000mg/L, sulfate radical 12000mg/L, chloride ion be 12000mg/L, pH be the desulfurization of 5.2
Waste water；Being adjusted to 10.2 through adding alkali liquor pH, add flocculant, after precipitation, acid liquid carries out pH readjustment, adds softening agent and goes forward side by side
Row fine straining filters, filtrate entrance electrodialyzer, electrodialysis employing 400*800, the homogeneous membrane membrane stack of 100 pairs of films, one-level one section
Electrodialyzer, intermittent cycle processing mode is carried out, and dense water conductivity is 168mS/cm, and fresh water electrical conductivity is 5mS/cm；Take 60L
Electrical conductivity is that the dense water of electrodialysis of 168mS/cm carries out Acid-And Base-making By Bipolar Membrane, produces the alkali liquor of pH=12.5, the acid solution of pH=2.8
Carry out the reuse of preprocessing process.Take the dense water of electrodialysis that 400L electrical conductivity is 168mS/cm to carry out bypass flue evaporation equipment and enter
Row atomization and vaporization.
Running effect:
1. the float of neutralization pond rapid precipitation after adding the alkali liquor that Bipolar Membrane prepares, 15min has precipitated, addition
The hardness ions of the overwhelming majority that softening agent and accurate filter are effectively removed, water outlet Ca2+=40mg/L；Mg2+35mg/L；
SDI=1.8；PH=7.0, the desalination of limited minimizing salt concentrates the fouling risk of module, and electrodialysis runs room, pole and fresh water after 500h
Pressure reduction in room, dense hydroecium the most significantly changes；
2. electrodialysis plant stable operation, membrane stack power consumption former water per ton is 7kwh, is only the 1/2 of high pressure reverse osmosis energy consumption
And the 1/4 of multi-effect evaporator energy consumption, greatly reduce the overall energy consumption of system；
3. bypass flue equipment stable operation, the dense water of electrodialysis is flash evapn in bypass flue evaporates, and crystal salt is with cigarette
Gas returns in flue.
Embodiment 2:
Referring to Fig. 1 and Fig. 2, another power plant of family flue gas desulfurization waste-water 300L that the present embodiment 2 uses, calcium ion concentration is
800mg/L, magnesium ion concentration is 5000mg/L, sulfate radical 8520mg/L, chloride ion be 6530mg/L, pH be 6.7 desulfurization give up
Water；After adding alkali liquor and being neutralized to pH=9.5, flocculation sediment 15min, clear liquor adds 30g softening agent, accurate through multimedium
Filter, after water outlet enters through pH readjustment, enters electrodialysis process, and electrodialysis uses 400*800, the homogeneous membrane film of 50 pairs of films
Heap, the electrodialyzer that one-level is a section, intermittent cycle processing mode is carried out, and the dense water of electrodialysis taking 35L carries out Bipolar Membrane antacid
Alkali, produces the alkali liquor of pH=12.2, and the acid solution of pH=2.4 carries out the reuse of preprocessing process.Taking 250L electrical conductivity is electrodialysis
Dense water carries out bypass flue evaporation equipment and carries out atomization and vaporization.
Running effect:
1. the float of neutralization pond rapid precipitation after adding the alkali liquor that Bipolar Membrane prepares, 9min postprecipitation completes, water outlet
Ca2+=15mg/L；Mg2+=12mg/L；SDI=1.0；PH=7.0, the desalination of limited minimizing salt concentrates the fouling risk of module, electricity
After dialysis runs 500h, room, pole the most significantly changes with the pressure reduction in freshwater room, dense hydroecium；
2. electrodialysis plant stable operation, the dense water conductivity of electrodialysis is 155mS/cm, and electrodialysis fresh water electrical conductivity is
4mS/cm, membrane stack power consumption former water per ton is 7.9kwh.
3. bypass flue equipment stable operation, there is no crystal salt by the observation of observation panel and adheres on crystallizer.
Embodiment 3:
Referring to Fig. 1 and Fig. 2, another power plant of family flue gas desulfurization waste-water 500L that the present embodiment 3 uses, calcium ion concentration is
520mg/L, magnesium ion concentration is 3200mg/L, sulfate radical 6300mg/L, chloride ion be 5500mg/L, pH be 6.5 desulfurization give up
Water；By neutralization, flocculation sediment, and adding 20g softening agent, through accurate filter, water outlet enters electrodialysis process, electrodialysis
Using 400*800, the homogeneous membrane membrane stack of 70 pairs of films, the electrodialyzer that one-level is a section, intermittent cycle processing mode carries out, takes
The dense water of electrodialysis of 80L carries out Acid-And Base-making By Bipolar Membrane.Taking 380L electrical conductivity is that the dense water of electrodialysis carries out bypass flue evaporation equipment
Carry out atomization and vaporization.
Running effect:
1. the float of neutralization pond rapid precipitation after adding the alkali liquor that Bipolar Membrane prepares, 9min postprecipitation completes, water outlet
Ca2+=15mg/L；Mg2+=12mg/L；SDI=1.0；PH=7.0, the desalination of limited minimizing salt concentrates the fouling risk of module, electricity
After dialysis runs 500h, room, pole the most significantly changes with the pressure reduction in freshwater room, dense hydroecium；
2., through the operation of 100h, the normal procedure that multimedium fine filter cleans according to 3h runs, and filtrate is the most dirty
Stifled situation, water outlet SDI 3 meets technological requirement
3. electrodialysis plant stable operation, the dense water conductivity of electrodialysis is 160mS/cm, and electrodialysis fresh water electrical conductivity is
6mS/cm, membrane stack power consumption former water per ton is 8.6kwh.
4. the nebulizer of bypass flue equipment does not has obvious fouling, can run steadily in the long term.
It should be noted that in this article, the relational terms of such as first and second or the like is used merely to a reality
Body or operation separate with another entity or operating space, and deposit between not necessarily requiring or imply these entities or operating
Relation or order in any this reality.And, term " includes ", " comprising " or its any other variant are intended to
Comprising of nonexcludability, so that include that the process of a series of key element, method, article or terminal unit not only include those
Key element, but also include other key elements being not expressly set out, or also include for this process, method, article or end
The key element that end equipment is intrinsic.In the case of there is no more restriction, statement " including ... " or " comprising ... " limit
Key element, it is not excluded that there is also other key element in including the process of described key element, method, article or terminal unit.This
Outward, in this article, " be more than ", " being less than ", " exceeding " etc. are interpreted as not including this number；More than " ", " below ", " within " etc. understand
For including this number.
Although being described the various embodiments described above, but those skilled in the art once know basic wound
The property made concept, then can make other change and amendment to these embodiments, so the foregoing is only embodiments of the invention,
Not thereby the scope of patent protection of the present invention, every equivalent structure utilizing description of the invention and accompanying drawing content to be made are limited
Or equivalence flow process conversion, or directly or indirectly it is used in other relevant technical fields, the most in like manner it is included in the patent of the present invention
Within protection domain.
Claims (10)
1. based on electrodialytic zero emission treatment of desulfured waste water, it is characterised in that comprise the following steps:
(1) power plant desulfurization waste water is removed the float in desulfurization wastewater, heavy metal, the sulfur of part by neutralization, flocculation sediment
Acid ion, it is thus achieved that clear liquor carry out pH readjustment by adding acid solution, the clear liquor after pH readjustment meets follow-up fine straining and processes
Inflow requirement；
(2) clear liquor that step (1) obtained adds and softens chelating agen, then carries out fine straining process, by fine straining remove calcium ion,
Magnesium ion, controls the SDI in clear liquor below 3, it is thus achieved that fine straining produce water and meet the inflow requirement of subsequent film system；
(3) fine straining step (2) obtained produces hydromining electrodialysis and carries out salt concentration desalination process, it is thus achieved that salinity is higher than 15%
The dense water of electrodialysis and the producing water ratio electrodialysis fresh water higher than 60%；
(4) electrodialysis fresh water step (3) obtained is for other moisturizings of power plant, and dense for electrodialysis water is temporarily stored into dense water tank
In, it is adjusted distributing to bipolar membrane electrodialysis process and flue evaporation process by the process water yield of desulfurization wastewater；
(5) by step (4) bipolar membrane electrodialysis process produce alkali liquor and acid solution be back to respectively the neutralization in step (1) and
PH readjustment uses；
(6) step (4) is separated out, at follow-up flue gas with the form of crystal salt by the dense water of electrodialysis of flue evaporation process
Electric precipitation in reason traps in flyash, or adds cleaner unit in flue evaporates, and traps crystal salt, carries out resource profit
With.
The most according to claim 1 based on electrodialytic zero emission treatment of desulfured waste water, it is characterised in that described step
(1) the power plant desulfurization influent waste water flow in: 5-20m3/ h, calcium ion concentration is 500-2000mg/L, and magnesium ion concentration is
3000-6000mg/L, sulfate radical 6000-12000mg/L, chloride ion is 3000-12000mg/L, and pH value is 5.0-7.5.
The most according to claim 1 based on electrodialytic zero emission treatment of desulfured waste water, it is characterised in that described step
(2) fine straining processes and uses multi-medium filtering, the Ca of filtrate2+50mg/L, Mg2+50mg/L, pH=7.0, SDI 3.
The most according to claim 1 based on electrodialytic zero emission treatment of desulfured waste water, it is characterised in that described step
(3) electrodialysis plant in carries out salt and concentrates in desalination process, and salt concentration desalination module employing overlaps homogeneous membrane electrodialyzer,
Being carried out by one section of batch (-type) circular treatment of one-level, dense water conductivity reaches 150-170mS/cm, fresh water electrical conductivity 10mS/cm.
The most according to claim 1 based on electrodialytic zero emission treatment of desulfured waste water, it is characterised in that described step
(4), in, according to the water yield processed, the water operation of the dense water of electrodialysis is automatically adjusted, to process the electric osmose of the 1/20-1/5 of the water yield
Analyse the dense water yield and enter that bipolar membrane electrodialysis produces alkali liquor, acid solution is back to the neutralization of pretreatment and adjusts back with pH.
The most according to claim 1 based on electrodialytic zero emission treatment of desulfured waste water, it is characterised in that described step
(5), in, bipolar membrane electrodialysis processes alkali liquor and the acid solution of pH 3 of output pH 12.
The most according to claim 1 based on electrodialytic zero emission treatment of desulfured waste water, it is characterised in that described step
(5) in, flue evaporation process uses bypass flue evaporation technology, and the high-temperature flue gas taken in flue carries out atomization and vaporization to waste water, steams
Crystal after Faing and steam return with flue gas in the flue of power plant, handle together with smoke processing system.
8. based on electrodialytic desulfurization wastewater zero-discharge treatment system, it is characterised in that including: pretreatment pool, softening pond, fine straining
Device, electrodialyzer, fresh water collecting case, dense water collection tank, flue vaporising device, bipolar membrane electrodialysis device and acid & alkali liquid recovery pond,
The outlet of described pretreatment pool is connected with the entrance softening pond, and the outlet softening pond is connected with the entrance of fine filter, fine straining
The outlet of device is connected with the entrance of electrodialyzer, the outlet of electrodialyzer respectively with the entering of fresh water collecting case and dense water collection tank
Mouthful being connected, the outlet of described dense water collection tank entrance with bipolar membrane electrodialysis device and flue vaporising device respectively is connected,
The outlet of bipolar membrane electrodialysis device connects with the entrance of acid & alkali liquid recovery pond, and the outlet of acid & alkali liquid recovery pond enters with pretreatment pool
Mouth connection.
The most according to claim 8 based on electrodialytic desulfurization wastewater zero-discharge treatment system, it is characterised in that also to include
Chelating agen Scatula, the outlet of described chelating agen Scatula is connected with the entrance softening pond.
The most according to claim 9 based on electrodialytic desulfurization wastewater zero-discharge treatment system, it is characterised in that also to wrap
Including cleaner unit, the entrance of described cleaner unit is connected with the outlet of flue vaporising device.
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| CN107089753A (en) * | 2017-05-05 | 2017-08-25 | 浙江大维高新技术股份有限公司 | The processing method of power plant desulfurization wastewater |
| CN107311361A (en) * | 2017-07-31 | 2017-11-03 | 江苏久吾高科技股份有限公司 | A kind of technique and device for handling catalytic cracking and desulfurizing waste water |
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| CN107935255A (en) * | 2017-11-21 | 2018-04-20 | 江苏新海发电有限公司 | A kind of processing method of the desulfurization wastewater of near-zero release |
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| CN111099778A (en) * | 2019-12-04 | 2020-05-05 | 江苏京源环保股份有限公司 | Bipolar membrane electrodialysis recycling treatment process applied to high-salinity wastewater |
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| CN112473348A (en) * | 2020-11-06 | 2021-03-12 | 上海市政工程设计研究总院（集团）有限公司 | Flue gas treatment system and flue gas treatment method |
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| CN107089753A (en) * | 2017-05-05 | 2017-08-25 | 浙江大维高新技术股份有限公司 | The processing method of power plant desulfurization wastewater |
| CN107089753B (en) * | 2017-05-05 | 2019-09-06 | 浙江大维高新技术股份有限公司 | The processing method of power plant desulfurization wastewater |
| CN107311361A (en) * | 2017-07-31 | 2017-11-03 | 江苏久吾高科技股份有限公司 | A kind of technique and device for handling catalytic cracking and desulfurizing waste water |
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| CN107381729A (en) * | 2017-08-29 | 2017-11-24 | 大唐（北京）水务工程技术有限公司 | A kind of processing method of electrodialysis reactor and desulfurization wastewater |
| CN107935255A (en) * | 2017-11-21 | 2018-04-20 | 江苏新海发电有限公司 | A kind of processing method of the desulfurization wastewater of near-zero release |
| CN107867770A (en) * | 2017-12-26 | 2018-04-03 | 湖南钜晟环保科技工程有限公司 | A kind of desulfurization wastewater treatment system and its processing method |
| CN107867770B (en) * | 2017-12-26 | 2020-02-21 | 湖南钜晟环保科技工程有限公司 | Desulfurization wastewater treatment system and treatment method thereof |
| CN109205864A (en) * | 2018-11-29 | 2019-01-15 | 中国铝业股份有限公司 | A kind of processing method of red mud dealkalization waste water |
| CN109502855A (en) * | 2019-01-10 | 2019-03-22 | 山东蓝然环境科技有限公司 | A kind of wastewater treatment equipment of plant catalytic device sodium alkali desulphurization system |
| CN111099778A (en) * | 2019-12-04 | 2020-05-05 | 江苏京源环保股份有限公司 | Bipolar membrane electrodialysis recycling treatment process applied to high-salinity wastewater |
| CN111960515A (en) * | 2020-08-28 | 2020-11-20 | 浙江浙能技术研究院有限公司 | Chemical-adding-free acid pickling device and method for desulfurization wastewater concentration electrodialysis system |
| CN112624464A (en) * | 2020-11-04 | 2021-04-09 | 光大环境科技（中国）有限公司 | Treatment device for smoke washing wastewater |
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