CN205933496U - Desulfurization waste water zero release processing apparatus based on electrodialysis - Google Patents
Desulfurization waste water zero release processing apparatus based on electrodialysis Download PDFInfo
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- CN205933496U CN205933496U CN201620919788.0U CN201620919788U CN205933496U CN 205933496 U CN205933496 U CN 205933496U CN 201620919788 U CN201620919788 U CN 201620919788U CN 205933496 U CN205933496 U CN 205933496U
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Abstract
The utility model relates to an environmental engineering waste water treatment technology field, desulfurization waste water zero release processing apparatus based on electrodialysis, include: the neutralization pond, the flocculation and precipitation pond, soften the pond, the multimedium secondary filter, the electrodialysis device, the fresh water collecting box, dense water collecting box, by -pass flue evaporation plant and bipolar membrane electrodialysis ware, the export of neutralization pond is linked together with the entry in flocculation and precipitation pond, the export in flocculation and precipitation pond is linked together with the entry in soft pond, it is linked together to soften the export in pond and the entry of multimedium secondary filter, the export of multimedium secondary filter is linked together with the entry of electrodialysis device, the export of electrodialysis device is linked together with the entry of fresh water collecting box and dense water collecting box respectively, the export of dense water collecting box is linked together with bipolar membrane electrodialysis ware and by -pass flue evaporation plant's entry respectively, the export of bipolar membrane electrodialysis ware is linked together with the entry of neutralization pond. This desulfurization wastewater treatment device realizes the zero release can having extensive application prospect with the useless designing requirement that reaches environment friendly of useless system.
Description
Technical field
This utility model is related to environmental project technical field of waste water processing and in particular to a kind of given up based on electrodialytic desulfurization
Water zero discharge processing meanss.
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 neutralization, precipitation, coagulation, neutralization and slurry dewatering are processed etc. soften pretreatment (by desulfurization wastewater plus
Medicine coagulation clarification, removes most of 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 films, 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 purified 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 and discharges, reach following effect from waste water：So that wastewater to reach standard row
Put, waste water can be concentrated, carnallite discharge after evaporative crystallization.
But but suffer from the drawback that：(1) due to the desulfurization waste water quality water yield change greatly, the spy such as salinity height in waste water
The processing meanss of desulfurization wastewater are produced solid carnallite, carnallite complicated component cannot recycle by point, only as the useless place of danger
Reason.Moreover, because desulfurization system cost of investment is higher, due to there is no limited corresponding tune can be made according to water quality and quantity change
The technique of section is so that desulfurization wastewater treatment system can not run steadily in the long term.(2) there is pre- locating in desulfurization wastewater treatment system
The reagent cost of reason is too high, and the secondary pollution of medicament is serious, the end-o f-pipe -control load of processing system excessive it is impossible to complete to realize zero
Stable operation under emission request.(3) mainly carry out high power using reverse osmosiss in terms of film process and concentrate the recovery improving waste water
Rate, but operating pressure is too high, is susceptible to danger.
Utility model content
For this reason, it may be necessary to provide a kind of significantly more efficient desulfurization wastewater innoxious and processing equipment for recycling, thus significantly
Improve operational efficiency, reduce operating cost, the wastewater treatment improving Treated sewage reusing with system desalination is processed, and solves desulfurization wastewater zero
The requirement of discharge.
For achieving the above object, the technical solution adopted in the utility model be based on electrodialytic desulfurization wastewater zero-emission at
Reason device, including：Neutralization pond, flocculation sedimentation tank, softening pond, multimedium fine filter, electrodialysis plant, fresh water collecting case, concentrated water
Collecting box, bypass flue vaporising device and bipolar membrane electrodialysis device, the entrance phase of the outlet of described neutralization pond and flocculation sedimentation tank
Connection, the outlet of flocculation sedimentation tank is connected with the entrance softening pond, softens the outlet in pond and the entrance phase of multimedium fine filter
Connection, the outlet of multimedium fine filter is connected with the entrance of electrodialysis plant, and the outlet of electrodialysis plant is received with fresh water respectively
Header is connected with the entrance of concentrated water collecting box, the outlet of described concentrated water collecting box respectively with bipolar membrane electrodialysis device and bypass cigarette
The entrance of road vaporising device is connected, and the described outlet of bipolar membrane electrodialysis device is connected with the entrance of neutralization pond.
Further, also include PH regulating reservoir, the entrance of described PH regulating reservoir is electric with flocculation sedimentation tank and Bipolar Membrane respectively
The outlet of dialyser is connected, and the outlet of described PH regulating reservoir is connected with the entrance softening pond.
Further, described multimedium fine filter is ceramic membrane porous filter.
Further, flyash collecting tank, the entrance of described flyash collecting tank and bypass flue vaporising device are also included
Outlet be connected.
Further, also include softening agent Scatula, the outlet of described softening agent Scatula is connected with the entrance softening pond
Logical.Softening agent Scatula adds softening agent to enter softening pond, and this softening agent forms small flco with the calcium and magnesium hardness ions of waste water,
Filtration cooperation with follow-up accurate filter, the calcium and magnesium hardness ions in removing waste water.
Further, cleaner unit, the outlet of described cleaner unit and bypass flue vaporising device are also included.Setting dedusting
Device is used for trapping crystal salt, carries out recycling.
It is different from prior art, technique scheme has the advantage that as follows：
1. this utility model passes through neutralization precipitation pretreatment+softening secondary filter technique, removes oil removal, heavy metal, sulfur
Acid ion, calcium ion, magnesium ion, SDI is controlled below 3, meets the inflow requirement of follow-up electrodialysis process, at utmost
Reduce index of membrane fouling it is ensured that the operation steady in a long-term of electrodialysis process.
2. this utility model, in the electrodialysis process stage by way of intermittent cycle is processed, reduces electrodialytic setting
Standby cost, improves electrodialytic service efficiency and salt concentrates the performance of desalination, makes electrodialytic concentrated water electrical conductivity reach 150-
170mS/cm, electrodialysis fresh water electrical conductivity 10mS/cm.
3. this utility model is entered using bipolar membrane electrodialysis+flue evaporation technology in the technique that electrodialysis concentrated water is processed
Row combination, carries out the control to electrodialysis concentrated water antacid alkali for the bipolar membrane electrodialysis by processing the water yield, makes prepared acid ＆ alkali liquid firm
Meet well and in pretreating process, add alkali neutralization, the use of pH readjustment, improve the safety of system operation, and decrease pretreatment work
The dosing cost of skill and the workload made up a prescription, also reduce the desalination load of system and the negative of system flue evaporation on the whole
Lotus.
4. this utility model passes through the process combination of bipolar membrane electrodialysis+flue evaporation, improves the ability of end-o f-pipe -control, changes
Become in the past 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.To system end
Effective regulation that end is processed, copes with the change of the power plant different quality water yield it is ensured that whole system stable operation.This desulfurization wastewater
Processing system realizes zero-emission, simultaneously can using produce waste water produce carry out acid solution, alkali liquor carries out reuse, reach environment friend
Good design requirement, is with a wide range of applications.
Brief description
Fig. 1 is the structural representation of this utility model embodiment 1.
Fig. 2 is the structural representation of this utility model embodiment 2.
Specific embodiment
By the technology contents of detailed description technical scheme, structural features, realized purpose and effect, below in conjunction with concrete reality
Apply example and coordinate accompanying drawing to be explained in detail.
Embodiment 1：
With reference to shown in Fig. 1, based on electrodialytic desulfurization wastewater zero discharge treatment device, including：Neutralization pond 1, flocculation sediment
Pond 2, softening pond 3, multimedium fine filter 4, electrodialysis plant 5, fresh water collecting case 6, concentrated water collecting box 7, bypass flue evaporation dress
Put 8 and bipolar membrane electrodialysis device 9, the outlet of described neutralization pond 1 is connected with the entrance of flocculation sedimentation tank 2, flocculation sedimentation tank 2
Outlet is connected with the entrance softening pond 3, and the outlet softening pond 3 is connected with the entrance of multimedium fine filter 4, multimedium fine straining
The outlet of device 4 is connected with the entrance of electrodialysis plant 5, and the outlet of electrodialysis plant 5 is received with fresh water collecting case 6 and concentrated water respectively
The entrance of header 7 is connected, and the outlet of described concentrated water collecting box 7 is filled with bipolar membrane electrodialysis device 9 and bypass flue evaporation respectively
Put 8 entrance to be connected, the described outlet of bipolar membrane electrodialysis device 9 is connected with the entrance of neutralization pond.
In the present embodiment, also include PH regulating reservoir 10, the entrance of described PH regulating reservoir 10 respectively with flocculation sedimentation tank 2 and double
The outlet of pole EDBM device 9 is connected, and the outlet of described PH regulating reservoir 10 is connected with the entrance softening pond 3.
In the present embodiment, described multimedium fine filter 4 is ceramic membrane porous filter.
In the present embodiment, also include softening agent Scatula 12, the outlet of described softening agent Scatula 12 and entering of softening pond 3
Mouth is connected.Softening agent Scatula 12 adds softening agent to enter softening pond 3, and this softening agent is formed with the calcium and magnesium hardness ions of waste water
Small flco, the filtration cooperation with follow-up accurate filter, the calcium and magnesium hardness ions in removing waste water.
In the present embodiment, also include cleaner unit 11, the outlet of described cleaner unit 11 and bypass flue vaporising device 8.
Setting cleaner unit is used for trapping crystal salt, carries out recycling.
Embodiment 2：
With reference to shown in Fig. 2, the basic structure of the present embodiment is same as Example 1, and difference is：Do not have in the present embodiment
There is cleaner unit 11, the substitute is flyash collecting tank 13, the entrance of described flyash collecting tank 13 is evaporated with bypass flue
The outlet of device 8 is connected, and this flyash collecting tank 13 is used for trapping crystal salt, carries out recycling.
In order to prove the beneficial effect of this programme further, enumerate several concrete to be expanded on further with example：
With example 1：
Refer to Fig. 1, certain means of flue gas desulfurization of power plant waste water 500L of employing, calcium ion concentration is 2000mg/L, magnesium ion is dense
Spend for 6000mg/L, sulfate radical 12000mg/L, chloride ion is 12000mg/L, and pH is 5.2 desulfurization wastewater；Through adding alkali liquor
PH is adjusted to 10.2, adds flocculant, and after precipitation, acid liquid carries out pH readjustment, adds softening agent and carries out fine straining filtration, filtrate is entered
Enter electrodialyzer, electrodialysis adopt 400*800, the homogeneous membrane membrane stack of 100 pairs of films, the electrodialyzer that a section of one-level, and batch (-type) follows
Ring processing mode is carried out, and concentrated water electrical conductivity is 168mS/cm, and fresh water electrical conductivity is 5mS/cm；60L electrical conductivity is taken to be 168mS/cm
Electrodialysis concentrated water carry out Acid-And Base-making By Bipolar Membrane, produce the alkali liquor of pH=12.5, the acid solution of pH=2.8 carries out preprocessing process
Reuse.Take the electrodialysis concentrated water that 400L electrical conductivity is 168mS/cm to carry out bypass flue evaporation equipment and carry out atomization and vaporization.
Running effect：
1. the float of neutralization pond rapid precipitation after the alkali liquor adding Bipolar Membrane to be obtained, 15min precipitation completes, addition
The hardness ions of the overwhelming majority that softening agent is effectively removed with accurate filter, water outlet Ca2+=40mg/L；Mg2+35mg/L；
SDI=1.8；PH=7.0, limited minimizing salt desalination concentrates the fouling risk of module, and electrodialysis run pole room and fresh water after 500h
The indoor pressure reduction of room, concentrated water does not significantly change；
2. electrodialysis plant stable operation, membrane stack power consumption raw water per ton is 7kwh, is only the 1/2 of high pressure reverse osmosiss 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, electrodialysis concentrated water flash evapn in bypass flue evaporation, crystal salt is with cigarette
Gas returns in flue.
With example 2：
Refer to Fig. 1, this uses another power plant flue gas desulfurization waste-water 300L that example 2 adopts, calcium ion concentration is
800mg/L, magnesium ion concentration be 5000mg/L, sulfate radical 8520mg/L, chloride ion be 6530mg/L, pH be 6.7 desulfurization give up
Water；By plus after alkali liquor is 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, electrodialysis adopt 400*800, the homogeneous membrane film of 50 pairs of films
Heap, the electrodialyzer that a section of one-level, intermittent cycle processing mode is carried out, and takes the electrodialysis concentrated water of 35L to carry 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.250L electrical conductivity is taken to be electrodialysis
Concentrated water carries out bypass flue evaporation equipment and carries out atomization and vaporization.
Running effect：
1. the float of neutralization pond rapid precipitation after the alkali liquor adding Bipolar Membrane to be obtained, 9min postprecipitation completes, water outlet
Ca2+=15mg/L；Mg2+=12mg/L；SDI=1.0；PH=7.0, limited minimizing salt desalination concentrates the fouling risk of module, electricity
After dialysis runs 500h, the pole room pressure reduction indoor with freshwater room, concentrated water does not significantly change；
2. electrodialysis plant stable operation, electrodialysis concentrated water electrical conductivity is 155mS/cm, and electrodialysis fresh water electrical conductivity is
4mS/cm, membrane stack power consumption raw water per ton is 7.9kwh.
3. bypass flue equipment stable operation, has no crystal salt by the observation of observation panel and adheres on crystallizer.
With example 3：
Refer to Fig. 1, with another power plant flue gas desulfurization waste-water 500L of example 3 employing, calcium ion concentration is
520mg/L, magnesium ion concentration be 3200mg/L, sulfate radical 6300mg/L, chloride ion be 5500mg/L, pH be 6.5 desulfurization give up
Water；By neutralization, flocculation sediment, and add 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 a section of one-level, intermittent cycle processing mode is carried out, and takes
The electrodialysis concentrated water of 80L carries out Acid-And Base-making By Bipolar Membrane.380L electrical conductivity is taken to carry out bypass flue evaporation equipment for electrodialysis concentrated water
Carry out atomization and vaporization.
Running effect：
1. the float of neutralization pond rapid precipitation after the alkali liquor adding Bipolar Membrane to be obtained, 9min postprecipitation completes, water outlet
Ca2+=15mg/L；Mg2+=12mg/L；SDI=1.0；PH=7.0, limited minimizing salt desalination concentrates the fouling risk of module, electricity
After dialysis runs 500h, the pole room pressure reduction indoor with freshwater room, concentrated water does not significantly change；
2., through the operation of 100h, multimedium fine filter runs according to the normal procedure that 3h cleans, and filtrate is not substantially dirty
Stifled situation, water outlet SDI 3 meets technological requirement
3. electrodialysis plant stable operation, electrodialysis concentrated water electrical conductivity is 160mS/cm, and electrodialysis fresh water electrical conductivity is
6mS/cm, membrane stack power consumption raw water per ton is 8.6kwh.
4. the nebulizer of bypass flue equipment does not have obvious fouling, can run steadily in the long term.
This utility model passed through for the regulation of electrodialysis concentrated water to distribute into bipolar membrane electrodialysis device and side in the film process stage
In the flue vaporising device of road, pretreatment and film process are back to by bipolar membrane electrodialysis device antacid alkaline, realize subtracting of waste water
Quantify and resource, electrodialysis fresh water is back to film process, improves the meeting rate of fresh water, decreases the dosing cost of pretreatment
With 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 this utility model is processed by system end, copes with the different water quality and quantity change of power plant,
Ensure whole system stable operation.This desulfurization wastewater treatment system realizes zero-emission, waste recycling can reach environment friend simultaneously
Good design requirement, is with a wide range of applications.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality
Body or operation are made a distinction with another entity or operation, and not necessarily require or imply these entities or deposit between operating
In any this actual relation or order.And, term " inclusion ", "comprising" or its any other variant are intended to
The comprising of nonexcludability, so that include a series of process of key elements, 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 intrinsic key element of end equipment.In the absence of more restrictions, limited by sentence " including ... " or " comprising ... "
It is not excluded that also there is other key element in process, method, article or the terminal unit including described key element in key element.This
Outward, herein, " more than ", " less than ", " exceeding " etc. be interpreted as not including this number；" more than ", " below ", " within " etc. understand
It is including this number.
Although being described to the various embodiments described above, those skilled in the art once know basic wound
The property made concept, then can make other change and modification to these embodiments, so the foregoing is only reality of the present utility model
Apply example, not thereby limit scope of patent protection of the present utility model, every utilization this utility model description and accompanying drawing content
The equivalent structure made or equivalent flow conversion, or directly or indirectly it is used in other related technical fields, all include in the same manner
Within scope of patent protection of the present utility model.
Claims (6)
1. it is based on electrodialytic desulfurization wastewater zero discharge treatment device it is characterised in that including：Neutralization pond, flocculation sedimentation tank, soft
Change pond, multimedium fine filter, electrodialysis plant, fresh water collecting case, concentrated water collecting box, bypass flue vaporising device and Bipolar Membrane electricity
Dialyser, the outlet of described neutralization pond is connected with the entrance of flocculation sedimentation tank, the outlet of flocculation sedimentation tank and softening the entering of pond
Mouth is connected, and the outlet softening pond is connected with the entrance of multimedium fine filter, and the outlet of multimedium fine filter is filled with electrodialysis
The entrance put is connected, and the outlet of electrodialysis plant is connected with the entrance of fresh water collecting case and concentrated water collecting box respectively, described
The outlet of concentrated water collecting box is connected with the entrance of bipolar membrane electrodialysis device and bypass flue vaporising device respectively, described Bipolar Membrane
The outlet of electrodialyzer is connected with the entrance of neutralization pond.
2. according to claim 1 based on electrodialytic desulfurization wastewater zero discharge treatment device it is characterised in that also including
PH regulating reservoir, the entrance of described PH regulating reservoir is connected with the outlet of flocculation sedimentation tank and bipolar membrane electrodialysis device respectively, described
The outlet of PH regulating reservoir is connected with the entrance softening pond.
3. according to claim 1 based on electrodialytic desulfurization wastewater zero discharge treatment device it is characterised in that described many
Medium fine filter is ceramic membrane porous filter.
4. according to claim 1 based on electrodialytic desulfurization wastewater zero discharge treatment device it is characterised in that also including
Flyash collecting tank, the entrance of described flyash collecting tank is connected with the outlet of bypass flue vaporising device.
5. according to claim 1 based on electrodialytic desulfurization wastewater zero discharge treatment device it is characterised in that also including
Softening agent Scatula, the outlet of described softening agent Scatula is connected with the entrance softening pond.
6. according to claim 1 based on electrodialytic desulfurization wastewater zero discharge treatment device it is characterised in that also including
The outlet of cleaner unit, described cleaner unit and bypass flue vaporising device.
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| CN201620919788.0U CN205933496U (en) | 2016-08-23 | 2016-08-23 | Desulfurization waste water zero release processing apparatus based on electrodialysis |
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| CN201620919788.0U CN205933496U (en) | 2016-08-23 | 2016-08-23 | Desulfurization waste water zero release processing apparatus based on electrodialysis |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111039487A (en) * | 2020-01-06 | 2020-04-21 | 大唐环境产业集团股份有限公司 | Desulfurization wastewater treatment system and treatment method |
-
2016
- 2016-08-23 CN CN201620919788.0U patent/CN205933496U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111039487A (en) * | 2020-01-06 | 2020-04-21 | 大唐环境产业集团股份有限公司 | Desulfurization wastewater treatment system and treatment method |
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