CN209721842U - A kind of softening of high-salt wastewater and enrichment facility - Google Patents
A kind of softening of high-salt wastewater and enrichment facility Download PDFInfo
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- CN209721842U CN209721842U CN201822238283.XU CN201822238283U CN209721842U CN 209721842 U CN209721842 U CN 209721842U CN 201822238283 U CN201822238283 U CN 201822238283U CN 209721842 U CN209721842 U CN 209721842U
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Abstract
The utility model discloses a kind of softening of high-salt wastewater and enrichment facilities, the device includes: coagulating basin, its arrival end is connect with softening pond, outlet end is connect with multi-medium filtering system entry end, soften pond and coagulating basin bottom end and is equipped with spoil disposal pipeline, crystal seed reflux line one end is connect with spoil disposal pipeline, and the other end is connect with softening pond；Ultrafiltration system, arrival end are connect with multi-medium filtering system outlet end, and outlet end is connect with electrodialysis system arrival end, and the first concentrate reflux line is equipped between ultrafiltration system and coagulating basin；Counter-infiltration system is connect with electrodialysis system outlet end.The utility model has the following beneficial effects: can be by the Ca in high-salt wastewater2+Selective Separation；It is concentrated and is recycled the softening agent being excessively added, reduces the dosage and cost of sediment production quantity and softening agent；Realize the high magnification concentration of high-salt wastewater.
Description
Technical field
The utility model relates to environmental protection technical fields, soften and be concentrated dress in particular to a kind of high-salt wastewater
It sets.
Background technique
In all polymorphic type industrial wastewaters, high-salt wastewater is since salt content is high, discharge capacity is big and has corrosivity (such as to metal
Cl-Corrosion) etc. features, direct outlet ecological environment can be caused to seriously endanger.Currently, embrane method and thermal method be to high-salt wastewater into
The major technique of row zero discharge treatment, due to being often rich in Ca in waste water2+And Mg2+, it is easy to cause the equipment such as filter membrane and evaporator
Fouling, it is therefore necessary to first carry out softening pretreatment.Conventional softening method is by Ca2+And Mg2+All it is removed (such as white lime-
Method of Soda, caustic soda-Method of Soda and lime method etc.), this method there are softening agent consumptions it is big, precipitation capacity is big the problems such as.
Due to Mg2+Fouling can by adjusting pH prevention and control, even if formed Mg (OH)2Also usable acid cleans dirt；Ca2+It is formed
CaSO4The extremely difficult cleaning of dirt, dirt, which is known from experience, causes irreversible influence to the normal operation of filter membrane and evaporator.Therefore, if can select
Remove Ca to selecting property2+Without removing Mg2+, softening efficiency not only can be improved, can more reduce reagent cost.(substep is heavy by Li Xin etc.
Shallow lake method removes the research water treatment technology of calcium and magnesium in RE waste water, 2016,42 (7): 88-92) it proposes and a kind of is selected with oxalic acid
Property removal RE waste water Ca2+Method, (a kind of high magnesium low calcium desulfurization wastewater softens pretreatment unit Chinese patent: ZL to Li Fei etc.
2017 2 1032808.3,2017-8-17) and a kind of (high magnesium low calcium desulfurization wastewater softening pretreatment unit China such as Liu Haiyang
Patent: 2,017 2 1032793.0,2017-8-17 of ZL) propose a kind of heat-engine plant desulfurized waste water of oxalates selective removal
Ca2+Method, these methods removal Ca2+While to Mg2+Influence it is very low, softening agent consumption and heavy can be effectively reduced
Shallow lake yield.However, above-mentioned softening method is both needed to excessively add oxalic acid or oxalates as softening agent, the softening agent excessively added
It is finally discharged with waste water, since such softening agent price is higher, these techniques inevitably cause the excessive waste of softening agent.
Electrodialytic technique is commonly used for the high magnification concentration of high-salt wastewater, its working principle is that electrodialytic membranes is utilized to yin
Waste water filtering is concentrate and dilution by the selective penetrated property of cation and different valence state ion.Such as anode membrane only transmit sun from
Son, cavity block only transmit anion, and a divalent ion seperation film can intercept divalent ion etc..If can by a divalent ion seperation film with
Oxalates softening process combines, and can not only recycle oxalates softening agent (the predominantly recycling oxalic acid being excessively added
Root C2O4 2-), more it is able to achieve the high magnification concentration of waste water.
Utility model content
To solve the above problems, the purpose of this utility model is to provide the device of a kind of softening of high-salt wastewater and concentration,
The property of can choose by Ca2+The dosage and cost separated from waste water, recycle excessive softening medicament, reducing softening agent, and it is real
The high magnification concentration of existing waste water.
The utility model provides a kind of device high-salt wastewater softening and be concentrated, which includes:
Coagulating basin, arrival end are connect with softening pond, and the coagulating basin outlet end and multi-medium filtering system entry end connect
It connects；
Ultrafiltration system, arrival end are connect with multi-medium filtering system outlet end, the ultrafiltration system outlet end with
The connection of electrodialysis system arrival end；
Counter-infiltration system is connect with the electrodialysis system outlet end.
The top in the softening pond is equipped with PH and adjusts chemical feed pipe, crystal seed dispensing as a further improvement of the utility model,
Pipeline and the first medicament delivery pipeline.
The top of the coagulating basin is equipped with second medicament and launches pipeline as a further improvement of the utility model,.
The multi-medium filtering internal system is equipped with filter medium as a further improvement of the utility model,.
The electrodialysis system is equipped with anode and cathode, the electrodialysis system as a further improvement of the utility model,
System is internal to be equipped with multiple anode membranes and multiple divalent separation cavity block, and the anode membrane and a divalent separate cavity block arranged for interval
And freshwater room and concentrated water room are formed, the influent side of the counter-infiltration system passes through electrodialysis fresh water pipeline and the electrodialysis system
The outlet end connection of internal freshwater room, the concentrated water side of the counter-infiltration system by the second concentrate reflux line respectively with institute
The arrival end for stating freshwater room is connected with the softening pond.
The first agitating device, the coagulating basin are equipped with inside the softening pond as a further improvement of the utility model,
Inside is equipped with the second agitating device.
The production water side of the counter-infiltration system and reverse osmosis produced waterpipe connect as a further improvement of the utility model,
It connects, the outlet end of electrodialysis system concentrated water room is connect with electrodialysis concentrate pipeline.
The softening pond and the coagulating basin bottom end are equipped with spoil disposal pipeline as a further improvement of the utility model,.
The first concentrate is equipped between the ultrafiltration system and the coagulating basin as a further improvement of the utility model,
Reflux line.
It as a further improvement of the utility model, further include crystal seed reflux line, one end and the spoil disposal pipeline connect
It connects, the crystal seed reflux line other end is connect with the softening pond.
The utility model has the following beneficial effects: 1. can be by the Ca in high-salt wastewater2+Selective Separation is having substantially no effect on
Mg2+Waste water is softened under the premise of concentration；2. relative to by Ca2+And Mg2+The softening process being all removed reduces precipitating
The dosage and cost of object production quantity and softening agent；3. being concentrated and having recycled in the oxalate denominationby and waste water being excessively added
Sulfate ion, reduce the injected volume and cost of softening agent；4. the high magnification concentration of high-salt wastewater, system concentration can be realized
The salt content of liquid is also greatly reduced up to 10%-20%, wastewater flow, can significantly reduce subsequent Zero-discharge treating process at
This；5. passing through reverse osmosis equipment recoverable part freshwater resources.
Detailed description of the invention
Fig. 1 is a kind of apparatus structure schematic diagram high-salt wastewater softening and be concentrated described in the utility model embodiment.
In figure,
1, PH adjusts chemical feed pipe；2, soften pond；3, coagulating basin；4, multi-medium filtering system；5, the first agitating device；6,
Two agitating devices；7, electrodialysis system；8, crystal seed reflux line；9, spoil disposal pipeline；10, crystal seed launches pipeline；11, the first medicament
Launch pipeline；12, second medicament launches pipeline；13, ultrafiltration system；14, counter-infiltration system；15, filter medium；16, electrodialysis
Fresh water pipeline；17, the first concentrate reflux line；18, the second concentrate reflux line；19, reverse osmosis produced waterpipe；20, electric
Dialysis concentrate pipeline；21, freshwater room；22, positive；23, cathode；24, anode membrane；25, a divalent separates cavity block；26, concentrated water room.
Specific embodiment
Below by specific embodiment and in conjunction with attached drawing, the utility model is further described in detail.
Embodiment
As shown in Figure 1, being a kind of device high-salt wastewater softening and be concentrated, the device described in the utility model embodiment
Include:
Coagulating basin 3, arrival end are connect with softening pond 2, and 3 outlet end of coagulating basin and 4 arrival end of multi-medium filtering system connect
It connects；
Ultrafiltration system 13, arrival end are connect with 4 outlet end of multi-medium filtering system, 13 outlet end of ultrafiltration system and electric osmose
The connection of 7 arrival end of analysis system；
Counter-infiltration system 14 is connect with 7 outlet end of electrodialysis system.
Further, the top for softening pond 2 is equipped with PH and adjusts chemical feed pipe 1, crystal seed dispensing pipeline 10 and the first medicament delivery
Pipeline 11.
Further, the top of coagulating basin 3 is equipped with second medicament and launches pipeline 12.
Further, filter medium 15 is equipped with inside multi-medium filtering system 4.
Further, electrodialysis system 7 is equipped with anode 22 and cathode 23, is equipped with multiple anode membranes 24 inside electrodialysis system 7
Cavity block 25 is separated with multiple divalent, and anode membrane 24 and a divalent separate 25 arranged for interval of cavity block and form freshwater room 21 and concentrated water
Room 26, influent side the going out by the freshwater room 21 inside electrodialysis fresh water pipeline 16 and electrodialysis system 7 of counter-infiltration system 14
The connection of mouthful end, the concentrated water side of counter-infiltration system 14 by the second concentrate reflux line 18 respectively with the arrival end of freshwater room 21 and
Soften pond 2 to connect.
Further, soften and be equipped with the first agitating device 5 inside pond 2, be equipped with the second agitating device 6 inside coagulating basin 3.
Further, the production water side of counter-infiltration system 14 is connect with reverse osmosis produced waterpipe 19, inside electrodialysis system 7
26 outlet end of concentrated water room is connect with electrodialysis concentrate pipeline 20.
Further, soften pond 2 and 3 bottom end of coagulating basin and be equipped with spoil disposal pipeline 9.
Further, the first concentrate reflux line 17 is equipped between ultrafiltration system 13 and coagulating basin 3.
Further, the device of high-salt wastewater softening and concentration further includes crystal seed reflux line 8, one end and spoil disposal pipeline
9 connections, 8 other end of crystal seed reflux line are connect with softening pond 2.
Further, the anode membrane 24 inside electrodialysis system 7 only allows cation to pass through, one inside electrodialysis system 7
Divalent separation cavity block 25 only allows univalent anion to pass through.
High-salt wastewater be first conveyed to softening pond 2 in carry out sofening treatment obtain softening waste water, after-tack waste water again
Be transported in coagulating basin 3 and carry out coagulating treatment and obtain coagulation waste water, coagulation waste water be transported in multi-medium filtering system 4 into
The first filtration treatment of row obtains clarified wastewater, and clarified wastewater is transported to progress secondary filter ultrafiltration in ultrafiltration system 13 and obtains later
Water is produced to ultrafiltration, ultrafiltration, which produces water and is then transported in the freshwater room 21 inside electrodialysis system 7, gives electrodialysis process, and ultrafiltration produces
Under the traction of anode 22 and cathode 23, zwitterion is shifted to opposite electrode water respectively, and cation then penetrates anode membrane 24 later
Into in concentrated water room 26, univalent anion then penetrates divalent separation cavity block 25 and enters concentrated water room 26, obtains electrodialysis concentrate,
The concentrate is that the concentration of entire processing unit produces water, and salinity can reach 10%-20%, finally pass through electrodialysis concentrate
Pipeline 20 is discharged, and dianion (mainly including oxalate denominationby and sulfate ion etc.) separates cavity block 25 by a divalent
It intercepts and obtains electrodialysis fresh water in freshwater room 21, last obtained electrodialysis fresh water is entered by electrodialysis fresh water pipeline 16
Reverse osmosis treatment is carried out in counter-infiltration system 14 obtains reverse osmosis produced water and reverse osmosis concentrated liquid.
Wherein, it is to add hydrochloric acid or sodium hydroxide into softening pond 2 that the PH at 2 top of softening pond, which adjusts the effect of chemical feed pipe 1,
Make to soften the pH value in pond 2 to control within the scope of 6.0-7.5；The effect that crystal seed launches pipeline 10 is thrown into softening pond 2
Add crystal seed, reacts the high-salt wastewater in softening pond 2 with crystal seed and precipitated, wherein crystal seed and high-salt wastewater mass ratio are 2 ‰
~5 ‰；The effect of first medicament delivery pipeline 11 be to softening pond 2 in add potassium oxalate or sodium oxalate medicament, make potassium oxalate or
Sodium oxalate carries out softening with high-salt wastewater and reacts, and the calcium ion in high-salt wastewater is precipitated；The softening of first 5 pairs of agitating device
High-salt wastewater, medicament, crystal seed in pond 2 etc. are stirred quickening softening reaction efficiency；Partly precipitated object in softening pond 2 passes through
The spoil disposal pipeline 9 of bottom is excluded, and another part sediment then passes through crystal seed reflux line 8 and is back in softening pond 2 again
As supplement crystal seed.
The effect that 3 top second medicament of coagulating basin launches pipeline 12 is to launch coagulant into coagulating basin 3, makes coagulating basin 3
In softening waste water suspended matter carry out coagulating sedimentation；The effect of second agitating device 6 be in coagulating basin softening waste water and
Coagulant is stirred, to accelerate the coagulation speed of suspended matter in softening waste water.Sediment in coagulating basin 3 passes through its bottom
Spoil disposal pipeline 9 be discharged.
Filter medium 15 in multi-medium filtering system 4 carries out the suspended matter of coagulation waste water in multi-medium filtering system 4
Retention separation, to then obtain clarified wastewater in multi-medium filtering system 4.
Clarified wastewater is carried out secondary filter by ultrafiltration system 13, by objects such as small suspended matter, colloid and macromoleculars in book
Matter is filtered separation, obtains that liquid is concentrated by ultrafiltration and ultrafiltration produces water, wherein liquid, which is concentrated by ultrafiltration, then passes through the first concentrate pipeline 17
It is back in coagulating basin 3 and realizes separation of solid and liquid.
The concentration of reverse osmosis concentrated liquid oxalate and sulfate radical plasma obtained in counter-infiltration system 14 is higher, and one
The second concentrate of lease making reflux line 18 flows back into softening pond 2 and recycles as softening medicament, remaining reverse osmosis concentrated liquid warp
Second concentrate reflux line 18 flows back into freshwater room 21 and is concentrated again；Reverse osmosis produced water obtained in counter-infiltration system 14 is pure
Degree is very high, is discharged through reverse osmosis produced waterpipe 19, and recoverable.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of high-salt wastewater softening and enrichment facility characterized by comprising
Coagulating basin (3), arrival end are connect with softening pond (2), coagulating basin (3) outlet end and multi-medium filtering system (4)
Arrival end connection；
Ultrafiltration system (13), arrival end are connect with multi-medium filtering system (4) outlet end, and the ultrafiltration system (13) goes out
Mouth end is connect with electrodialysis system (7) arrival end；
Counter-infiltration system (14) is connect with the electrodialysis system (7) outlet end.
2. high-salt wastewater softening according to claim 1 and enrichment facility, which is characterized in that the top of softening pond (2)
Portion is equipped with PH and adjusts chemical feed pipe (1), crystal seed dispensing pipeline (10) and the first medicament delivery pipeline (11).
3. high-salt wastewater softening according to claim 1 and enrichment facility, which is characterized in that the top of the coagulating basin (3)
Portion is equipped with second medicament and launches pipeline (12).
4. high-salt wastewater softening according to claim 1 and enrichment facility, which is characterized in that the multi-medium filtering system
(4) internal to be equipped with filter medium (15).
5. high-salt wastewater softening according to claim 1 and enrichment facility, which is characterized in that the electrodialysis system (7)
Multiple anode membranes (24) are equipped with equipped with positive (22) and cathode (23), inside the electrodialysis system (7) to separate with multiple divalent
Cavity block (25), and the anode membrane (24) separates cavity block (25) arranged for interval with a divalent and forms freshwater room (21) and concentrated water
The influent side of room (26), the counter-infiltration system (14) passes through in electrodialysis fresh water pipeline (16) and the electrodialysis system (7)
The outlet end of the freshwater room (21) in portion connects, and the concentrated water side of the counter-infiltration system (14) passes through the second concentrate reflux line
(18) it is connect respectively with the arrival end of the freshwater room (21) and the softening pond (2).
6. high-salt wastewater softening according to claim 1 and enrichment facility, which is characterized in that the softening pond (2) is internal
Equipped with the first agitating device (5), the second agitating device (6) are equipped with inside the coagulating basin (3).
7. high-salt wastewater softening according to claim 5 and enrichment facility, which is characterized in that the counter-infiltration system (14)
Production water side connect with reverse osmosis produced waterpipe (19), internal concentrated water room (26) outlet end of the electrodialysis system (7) and electricity
Dialysis concentrate pipeline (20) connection.
8. high-salt wastewater softening according to claim 1 and enrichment facility, which is characterized in that the softening pond (2) and institute
Coagulating basin (3) bottom end is stated equipped with spoil disposal pipeline (9).
9. high-salt wastewater according to claim 1 softening and enrichment facility, which is characterized in that the ultrafiltration system (13) and
The first concentrate reflux line (17) is equipped between the coagulating basin (3).
10. high-salt wastewater softening according to claim 8 and enrichment facility, which is characterized in that further include crystal seed return pipe
Road (8), one end are connect with the spoil disposal pipeline (9), and crystal seed reflux line (8) other end and the softening pond (2) are even
It connects.
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| US11502322B1 (en) | 2022-05-09 | 2022-11-15 | Rahul S Nana | Reverse electrodialysis cell with heat pump |
| US11502323B1 (en) | 2022-05-09 | 2022-11-15 | Rahul S Nana | Reverse electrodialysis cell and methods of use thereof |
| US11855324B1 (en) | 2022-11-15 | 2023-12-26 | Rahul S. Nana | Reverse electrodialysis or pressure-retarded osmosis cell with heat pump |
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| CN111039433A (en) * | 2019-12-13 | 2020-04-21 | 浙江天地环保科技有限公司 | System and method for treating ship tail gas desulfurization washing wastewater |
| US11502322B1 (en) | 2022-05-09 | 2022-11-15 | Rahul S Nana | Reverse electrodialysis cell with heat pump |
| US11502323B1 (en) | 2022-05-09 | 2022-11-15 | Rahul S Nana | Reverse electrodialysis cell and methods of use thereof |
| US11563229B1 (en) | 2022-05-09 | 2023-01-24 | Rahul S Nana | Reverse electrodialysis cell with heat pump |
| US11611099B1 (en) | 2022-05-09 | 2023-03-21 | Rahul S Nana | Reverse electrodialysis cell and methods of use thereof |
| US11699803B1 (en) | 2022-05-09 | 2023-07-11 | Rahul S Nana | Reverse electrodialysis cell with heat pump |
| US12107308B2 (en) | 2022-05-09 | 2024-10-01 | Rahul S Nana | Reverse electrodialysis cell and methods of use thereof |
| US11855324B1 (en) | 2022-11-15 | 2023-12-26 | Rahul S. Nana | Reverse electrodialysis or pressure-retarded osmosis cell with heat pump |
| US12040517B2 (en) | 2022-11-15 | 2024-07-16 | Rahul S. Nana | Reverse electrodialysis or pressure-retarded osmosis cell and methods of use thereof |
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