CN209113651U - A kind of processing unit of desulfurization wastewater - Google Patents
A kind of processing unit of desulfurization wastewater Download PDFInfo
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- CN209113651U CN209113651U CN201821968260.8U CN201821968260U CN209113651U CN 209113651 U CN209113651 U CN 209113651U CN 201821968260 U CN201821968260 U CN 201821968260U CN 209113651 U CN209113651 U CN 209113651U
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- 238000012545 processing Methods 0.000 title claims abstract description 63
- 239000002351 wastewater Substances 0.000 title claims abstract description 53
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 45
- 230000023556 desulfurization Effects 0.000 title claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 196
- 238000004519 manufacturing process Methods 0.000 claims abstract description 22
- 238000001728 nano-filtration Methods 0.000 claims description 134
- 238000001223 reverse osmosis Methods 0.000 claims description 65
- 238000000909 electrodialysis Methods 0.000 claims description 59
- 238000006243 chemical reaction Methods 0.000 claims description 40
- 238000010790 dilution Methods 0.000 claims description 32
- 239000012895 dilution Substances 0.000 claims description 32
- 238000005406 washing Methods 0.000 claims description 31
- 239000012528 membrane Substances 0.000 claims description 18
- 230000005611 electricity Effects 0.000 claims description 13
- 235000006508 Nelumbo nucifera Nutrition 0.000 claims description 5
- 240000002853 Nelumbo nucifera Species 0.000 claims description 5
- 235000006510 Nelumbo pentapetala Nutrition 0.000 claims description 5
- 238000000502 dialysis Methods 0.000 claims description 3
- 230000008595 infiltration Effects 0.000 claims 1
- 238000001764 infiltration Methods 0.000 claims 1
- 150000003839 salts Chemical class 0.000 abstract description 28
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 abstract description 21
- 239000011780 sodium chloride Substances 0.000 abstract description 8
- 239000013078 crystal Substances 0.000 abstract description 6
- 239000010802 sludge Substances 0.000 abstract description 3
- 238000001914 filtration Methods 0.000 description 19
- 239000013505 freshwater Substances 0.000 description 18
- 238000000034 method Methods 0.000 description 17
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 15
- 229910001424 calcium ion Inorganic materials 0.000 description 15
- 238000002425 crystallisation Methods 0.000 description 11
- 230000008025 crystallization Effects 0.000 description 11
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 10
- 239000012141 concentrate Substances 0.000 description 9
- 238000001556 precipitation Methods 0.000 description 8
- 239000000920 calcium hydroxide Substances 0.000 description 5
- 235000011116 calcium hydroxide Nutrition 0.000 description 5
- 229910052938 sodium sulfate Inorganic materials 0.000 description 5
- 235000011152 sodium sulphate Nutrition 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 239000008399 tap water Substances 0.000 description 4
- 235000020679 tap water Nutrition 0.000 description 4
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 3
- 229910001425 magnesium ion Inorganic materials 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 239000006228 supernatant Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000001471 micro-filtration Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The utility model provides a kind of processing unit of desulfurization wastewater, and device each processing unit provided by the utility model configures reasonable, stable, high degree of automation, and scale is suitble to handle desulfurization wastewater.Desulfurization wastewater is handled using above-mentioned processing unit provided by the utility model, for salt in the final desulfurization wastewater other than the part precipitated in form of a sludge, rest part all crystallizes reuse, forms sodium chloride crystal salt, purity is greater than 95%, can reach country-level Nacl standard；And 90% or more water is desalinated in the desulfurization wastewater, can be back in production after collection, and wastewater zero discharge and height resource utilization are basically reached.
Description
Technical field
The utility model relates to technical field of waste water processing, and in particular to a kind of processing unit of desulfurization wastewater.
Background technique
Desulfurization wastewater derives from the flue gas desulphurization system of coal-burning power plant, and alkaline matter is added mainly in desulphurization system
The sulfur dioxide in flue gas is absorbed, needs to arrange waste water that is dense and generating in cyclic process.Desulfurization wastewater hardness is high, containing a large amount of
Suspended matter, and salt content is high, contains certain heavy metal ion simultaneously, direct emission can cause great harm environment.
It is domestic at present (to neutralize, flocculate, precipitation process) processing desulfurization only with three traditional header processing systems mostly
Waste water although eliminating suspended matter and the heavy metal ion etc. in desulfurization wastewater, but still is high rigidity waste water with high salt, can not carry out
Reuse.And increasingly raising and the continuous improvement of emission request with society to environmental requirement, advanced treatment and reclamation desulfurization are useless
Water realizes that desulfurization wastewater zero-emission is trend of the times.
Utility model content
The purpose of this utility model is to provide a kind of processing units of desulfurization wastewater, using place provided by the utility model
It manages device and handles desulfurization wastewater, resource utilization rate is high, basically reaches wastewater zero discharge.
In order to realize above-mentioned purpose of utility model, the utility model the following technical schemes are provided:
The utility model provides a kind of processing unit of desulfurization wastewater, including
Dosing reaction settling basin 1；
The filter element 2 being connected to the water outlet of the dosing reaction settling basin 1；
The washing dilution tank 3 being connected to the water outlet of the filter element 2；
The level-one nano-filtration unit 4 being connected to the water outlet of the washing dilution tank 3, the concentrated water of the level-one nano-filtration unit 4
Outlet is connected to the dosing reaction settling basin 1；Nanofiltration membrane in the level-one nano-filtration unit 4 is the nanofiltration of surface bear electricity
Film；
The second level nano-filtration unit 6 being connected to the production water out of the level-one nano-filtration unit 4, the second level nano-filtration unit 6
Concentrated water outlet is connected to the dosing reaction settling basin 1 and washing dilution tank 3；Nanofiltration membrane in the second level nano-filtration unit 6 is
The nanofiltration membrane of surface lotus positive electricity；
The reverse osmosis units 7 being connected to the production water out of the second level nano-filtration unit 6；
With the electrodialysis cell 10 of the concentrated water outlet of the reverse osmosis units 7, the fresh water of the electrodialysis cell 10
Outlet is connected to the reverse osmosis units 7；
With the crystalline element 12 of the concentrated water outlet of the electrodialysis cell 10.
It preferably, further include reuse water tank 8, the water outlet of the reverse osmosis units 7 is connected to the reuse water tank 8,
The condensation-water drain of the crystalline element 12 is connected to the reuse water tank 8；The reuse water tank 8 includes multiple water outlets,
In a water outlet be connected to the washing dilution tank 3.
It preferably, further include reverse osmosis concentrated water tank 9, the reverse osmosis concentrated water tank 9 is set to the reverse osmosis units 7 and electricity
Between dialysis unit 10.
It preferably, further include electrodialysis concentrated water case 11, the electrodialysis concentrated water case 11 is set to the electrodialysis cell 10
Between crystalline element 12.
Preferably, return line is provided between the filter element 2 and the dosing reaction settling basin 1.
The utility model provides a kind of processing unit of desulfurization wastewater, device each processing unit provided by the utility model
Reasonable, stable, high degree of automation is configured, scale is suitble to handle desulfurization wastewater.On provided by the utility model
State processing unit processing desulfurization wastewater, the salt in the final desulfurization wastewater other than the part precipitated in form of a sludge,
Rest part all crystallizes reuse, forms sodium chloride crystal salt, and purity is greater than 95%, can reach country-level Nacl standard；And
90% or more water is desalinated in the desulfurization wastewater, can be back in production after collection, and wastewater zero discharge and height are basically reached
Spend resource utilization.
Detailed description of the invention
Fig. 1 is the processing device structure diagram of desulfurization wastewater provided by the utility model, in figure, 1- dosing reaction precipitating
Pond, 2- filter element, 3- wash dilution tank, 4- level-one nano-filtration unit, 5- level-one nanofiltration water producing tank, 6- second level nano-filtration unit, 7-
Reverse osmosis units, 8- reuse water tank, the reverse osmosis concentrated water tank of 9-, 10- electrodialysis cell, 11- electrodialysis concentrated water case, 12- crystallization are single
Member.
Specific embodiment
The utility model provides a kind of processing unit of desulfurization wastewater, including
Dosing reaction settling basin 1；
The filter element 2 being connected to the water outlet of the dosing reaction settling basin 1；
The washing dilution tank 3 being connected to the water outlet of the filter element 2；
The level-one nano-filtration unit 4 being connected to the water outlet of the washing dilution tank 3, the concentrated water of the level-one nano-filtration unit 4
Outlet is connected to the dosing reaction settling basin 1；
The second level nano-filtration unit 6 being connected to the production water out of the level-one nano-filtration unit 4, the second level nano-filtration unit 6
Concentrated water outlet is connected to the dosing reaction settling basin 1 and washing dilution tank 3；
The reverse osmosis units 7 being connected to the production water out of the second level nano-filtration unit 6；
With the electrodialysis cell 10 of the concentrated water outlet of the reverse osmosis units 7, the fresh water of the electrodialysis cell 10
Outlet is connected to the reverse osmosis units 7；
With the crystalline element 12 of the concentrated water outlet of the electrodialysis cell 10.
Processing unit provided by the utility model includes dosing reaction settling basin 1.In the present invention, the dosing is anti-
Answer sedimentation basin 1 for carrying out precipitation reaction；The utility model does not have special restriction for the dosing reaction settling basin, can
Guarantee that the precipitation reaction is gone on smoothly.
Processing unit provided by the utility model includes the filtering list being connected to the water outlet of the dosing reaction settling basin 1
Member 2.In the present invention, the filter element 2 is for being filtered processing；The utility model is for the filter element 2
There is no special restriction, can guarantee that the filtration treatment is gone on smoothly, it, can as one embodiment of the utility model
Using sand filtering device, ultrafiltration apparatus or micro-filtration.
In the present invention, a small amount of backwash, cleaning can be generated by being filtered in treatment process in the filter element 2
Water；The backwash, ejected wash water are preferably back in the dosing reaction settling basin 1 and carry out precipitation process, energy by the utility model
The high-recovery of enough guarantee systems and the requirement of zero-emission；It, can be in the filtering as one embodiment of the utility model
Return line is set between unit 2 and dosing reaction settling basin 1, so that the backwash, ejected wash water are back to the dosing reaction
In sedimentation basin 1, system loading not will increase while improving system recycled in its entirety rate.
Processing unit provided by the utility model includes the washing dilution tank 3 being connected to the water outlet of the filter element 2.
In the present invention, the washing dilution tank 3 is for carrying out washing dilution processing；The utility model dilutes the washing
The not special restriction of case 3 can guarantee that the washing dilution processing is gone on smoothly.
Processing unit provided by the utility model includes the level-one nanofiltration list being connected to the water outlet of the washing dilution tank 3
The concentrated water outlet of member 4, the level-one nano-filtration unit 4 is connected to the dosing reaction settling basin 1.In the present invention, described
Level-one nano-filtration unit 4 is for carrying out the level-one nanofiltration processing；In the present invention, nanofiltration in the level-one nano-filtration unit 4
Film is the nanofiltration membrane of surface bear electricity.It is reacted with the dosing concentrated water outlet of level-one nano-filtration unit described in the utility model 4
Sedimentation basin 1 is connected to, and the level-one nanofiltration concentrate recirculation generated in the level-one nano-filtration unit 4 can be made to react to the dosing and precipitated
It is further processed in pond 1.
Processing unit provided by the utility model includes that the second level being connected to the production water out of the level-one nano-filtration unit 4 is received
Unit 6 is filtered, the concentrated water outlet of the second level nano-filtration unit 6 is connected to the dosing reaction settling basin 1 and washing dilution tank 3.?
In the utility model, the second level nano-filtration unit 6 is for carrying out the second level nanofiltration processing；In the present invention, described two
Nanofiltration membrane is the nanofiltration membrane of surface lotus positive electricity in grade nano-filtration unit 6.The concentrated water of second level nano-filtration unit described in the utility model 6 goes out
Mouth is connected to the dosing reaction settling basin 1 and washing dilution tank 3, and the second level nano-filtration unit can be made in actual application
The second level nanofiltration concentrate recirculation generated in 6 is further processed into the dosing reaction settling basin 1 or washing dilution tank 3.
As one embodiment of the utility model, the processing unit further includes level-one nanofiltration water producing tank 5, the level-one
Nanofiltration water producing tank 5 is set between the level-one nano-filtration unit 4 and second level nano-filtration unit 6；In the present invention, the level-one
The level-one nanofiltration production water generated in nano-filtration unit 4 enters in second level nano-filtration unit 6 through the level-one nanofiltration water producing tank 5 further to be located
Reason.Level-one nanofiltration water producing tank 5 is arranged in the utility model between the level-one nano-filtration unit 4 and second level nano-filtration unit 6, side
Just design, adjusting and the control of two-stage nano-filtration unit has certain buffer function, second level nano-filtration unit is made to receive independently of level-one
It filters except unit, facilitates the rate of recovery and concentrated water situation of control second level nano-filtration unit, make the technique adjustable space of whole system
Become larger, has better adaptability to raw water quality fluctuation.
Processing unit provided by the utility model include be connected to the production water out of the second level nano-filtration unit 6 it is reverse osmosis
Unit 7.In the present invention, the reverse osmosis units 7 are for carrying out the reverse osmosis concentration processing；The utility model for
The not special restriction of the reverse osmosis units 7 can guarantee that the reverse osmosis concentration processing is gone on smoothly.
Processing unit provided by the utility model includes the electrodialysis list with the concentrated water outlet of the reverse osmosis units 7
Member 10.In the present invention, the electrodialysis cell 10 is for carrying out electrodialysis concentration；The utility model is for described
The not special restriction of electrodialysis cell 10 can guarantee that the electrodialysis concentration is gone on smoothly.It is practical as this
Novel one embodiment, the water outlet of the electrodialysis cell 10 are connected to the reverse osmosis units 7, will be described with realization
The electrodialysis fresh water generated in electrodialysis cell 10 is back in the reverse osmosis units 7 and is further processed.
As one embodiment of the utility model, the processing unit further includes reverse osmosis concentrated water tank 9, described reverse osmosis
Concentrated water case 9 is set between the reverse osmosis units 7 and electrodialysis cell 10；In the present invention, the reverse osmosis units 7
The reverse osmosis concentrated water of middle generation enters in electrodialysis cell 10 through the reverse osmosis concentrated water tank 9 to be further processed.The utility model
Reverse osmosis concentrated water tank 9 is set between the reverse osmosis units 7 and electrodialysis cell 10, there is certain buffer function, be convenient for
The water supply of subsequent electrodialysis cell distributes.
Processing unit provided by the utility model includes the crystallization list with the concentrated water outlet of the electrodialysis cell 10
Member 12.In the present invention, the crystalline element 12 is for carrying out the crystallization treatment；The utility model is for the crystallization
The not special restriction of unit 12 can guarantee that the crystallization treatment is gone on smoothly.
As one embodiment of the utility model, the processing unit further includes electrodialysis concentrated water case 11, the electric osmose
Analysis concentrated water case 11 is set between the electrodialysis cell 10 and crystalline element 12；In the present invention, the electrodialysis list
The electrodialysis concentrated water generated in member 10 enters in crystalline element 12 through electrodialysis concentrated water case 11 to be further processed.The utility model exists
Electrodialysis concentrated water case 11 is set between the electrodialysis cell 10 and crystalline element 12, there is certain buffer function, after being convenient for
The water supply distribution of continuous crystalline element.
As one embodiment of the utility model, the processing unit further includes reuse water tank 8, the reverse osmosis units
7 water outlet is connected to the reuse water tank 8, and the condensation-water drain of the crystalline element 12 is connected to the reuse water tank 8；
In the present invention, the reuse water tank 8 is for recycling the reverse osmosis freshwater and the knot generated in the reverse osmosis units 7
Condensed water after brilliant 12 use of unit.As one embodiment of the utility model, the reuse water tank 8 includes multiple water outlets
Mouthful, one of water outlet is connected to the washing dilution tank 3, so as to the condensed water after the reverse osmosis freshwater that will be recycled and use
Reuse is into the washing dilution tank 3；Condensed water after the reverse osmosis freshwater and use can also be collected in reuse water tank 8
After be back in production, can by other water outlets of the reuse water tank 8 export after further utilize.
The method handled using processing unit provided by the utility model desulfurization wastewater specifically includes following step
It is rapid:
(1) it will be passed through dosing reaction settling basin 1 in desulfurization wastewater, milk of lime is then added and sodium sulphate carries out place of settling
Reason, is passed through filter element 2 for gained supernatant and is filtered processing, obtains filtering and produces water；
(2) filtering production water in the step (1) is passed through washing dilution tank 3 and carries out washing dilution processing, diluted
Filter produces water；
(3) dilute filtration in the step (2) is produced into water and is passed through the progress level-one nanofiltration processing of level-one nano-filtration unit 4, obtained
Level-one nanofiltration concentrated water and level-one nanofiltration produce water；
(4) by the medicine reaction settling basin 1 of level-one nanofiltration concentrate recirculation in the step (3) to the step (1), by institute
It states level-one nanofiltration production water and is passed through the progress second level nanofiltration processing of second level nano-filtration unit 6, obtain second level nanofiltration concentrated water and second level nanofiltration produces
Water；
(5) by the dosing reaction settling basin 1 of second level nanofiltration concentrate recirculation in the step (4) to the step (1) or
In the washing dilution tank 3 of the step (2), second level nanofiltration production water is passed through reverse osmosis units 7 and is carried out at reverse osmosis concentration
Reason, obtains reverse osmosis freshwater and reverse osmosis concentrated water；
(6) reverse osmosis freshwater in the step (5) is passed through reuse water tank 8 and is collected rear reuse, it will be described reverse osmosis
Concentrated water is passed through electrodialysis cell 10 through reverse osmosis concentrated water tank 9 and carries out electrodialysis concentration, obtains electrodialysis fresh water and electrodialysis
Concentrated water；
(7) electrodialysis fresh water in the step (6) is back in the reverse osmosis units 7 of the step (5), by the electricity
Dialysis concentrated water is passed through crystalline element 12 through electrodialysis concentrated water case 11 and carries out crystallization treatment, obtains sodium chloride crystal salt；The crystallization
The condensed water used in treatment process is passed through after reuse water tank 8 is collected and is back in production.
The utility model does not have the source of the desulfurization wastewater special restriction, using known to those skilled in the art
Desulfurization wastewater, the desulfurization wastewater that the desulfurization wastewater being specifically expelled directly out such as desulphurization system or conventional three headers are discharged.?
In the utility model, the salt content of the desulfurization wastewater is 25000~40000ppm；Calcium ion content is 3500~6000ppm,
Magnesium ion content is 400~1000ppm.In actual production, the salt in desulfurization wastewater is mainly sodium chloride；In the utility model
In, if the salt content in the desulfurization wastewater refers to the content of sodium chloride without specified otherwise.
In the embodiments of the present invention, specifically according to calcium ion content selection reflux in the second level nanofiltration concentrated water
Into dosing reaction settling basin 1 or in washing dilution tank 3；Specifically, in actual process, when the second level nanofiltration is dense
It in water when calcium ion content higher (>=3500ppm), then needs to be back in dosing reaction settling basin 1, otherwise will increase level-one and receive
Filter the fouling risk of processing；As calcium ion content lower (< 3500ppm) in second level nanofiltration concentrated water, then by the second level nanofiltration
Concentrate recirculation is into washing dilution tank 3.
In this practical utility model, reagent to be added is needed when handling using above-mentioned processing unit desulfurization wastewater
And the operating parameter used, with reference to technical solution well known to those skilled in the art.
Desulfurization wastewater is handled using above-mentioned processing unit provided by the utility model, the salt in the final desulfurization wastewater removes
Other than the part precipitated in form of a sludge, rest part all crystallizes reuse, forms sodium chloride crystal salt, and purity is greater than
95%, it can reach country-level Nacl standard；And 90% or more water is desalinated in the desulfurization wastewater, it can reuse after collection
In production, wastewater zero discharge and height resource utilization are basically reached.
Below in conjunction with the embodiments of the present invention, the technical solution in the utility model is carried out clear, complete
Ground description.Obviously, the described embodiments are only a part of the embodiments of the utility model, instead of all the embodiments.Base
In the embodiments of the present invention, institute obtained by those of ordinary skill in the art without making creative efforts
There are other embodiments, fall within the protection scope of the utility model.
In the present invention, if without specified otherwise, cycles of concentration described in following embodiment refers to be diluted with water before
Ratio of the wastewater flow rate (i.e. filtering water yield) with nanofiltration concentrated water amount.
Embodiment 1
Existing Shaoxing steam power plant has the desulfurization wastewater of about 25t per hour that need to carry out advanced treating.Now with 0.5t every batch of
Treating capacity is designed installation and debugging to desulfurizing waste water processing device provided by the utility model (as shown in Figure 1), then to this
The desulfurization wastewater of factory carries out pilot experiment, specific as follows:
Salt content is about 27000ppm in the three headers water outlet of factory's desulfurization wastewater, and calcium ion content is about 4500ppm, magnesium
Ion concentration is about 700ppm；
The three headers water outlet 0.5t of above-mentioned desulfurization wastewater is entered into dosing reaction settling basin 1 by immersible pump, 15kg is added
Sodium sulphate, 2kg milk of lime and flocculant (content of flocculant is about 5ppm in guarantee system), are stirred 30min, then into
Row precipitation process 4h；After the completion of the precipitation process, gained supernatant (calcium ion content is about 2000ppm) enters filter element
2, which are filtered processing, (specifically uses hyperfiltration treatment, can generate a small amount of backwash, ejected wash water in the treatment process, be back to dosing
In reaction settling basin 1), it obtains filtering and produces water；
It is described filtering produce water enter washing dilution tank 3 with tap water carry out washing dilution (tap water and filtering produce water body
Product is than being 0.5:1), it obtains dilute filtration and produces water；
The dilute filtration production water enters the progress of level-one nano-filtration unit 4 level-one nanofiltration processing, and (used nanofiltration membrane is table
The nanofiltration membrane of face bear electricity), after cycles of concentration reaches 1.3, stops level-one nanofiltration processing, obtain level-one nanofiltration concentrated water and level-one
Nanofiltration produces water；It is about 400ppm that the level-one nanofiltration, which produces calcium ion content in water, and salt content is about 16000ppm；The level-one is received
Filtering calcium ion content in concentrated water is about 2200ppm, and salt content is about 20000ppm；
The level-one nanofiltration concentrate recirculation is to dosing reaction settling basin 1 (under being added later into dosing reaction settling basin 1
A batch of three header is discharged 0.5t, adds sodium sulphate 5kg, milk of lime 2kg and flocculant 5ppm carries out next batch processing
Process), it is (used into the progress second level nanofiltration processing of second level nano-filtration unit 6 through level-one nanofiltration water producing tank 5 that level-one nanofiltration produces water
Nanofiltration membrane is the nanofiltration membrane of surface lotus positive electricity), after the rate of recovery reaches 90%, stops second level nanofiltration processing, obtain second level nanofiltration
Concentrated water and second level nanofiltration produce water；It is about 140ppm that the second level nanofiltration, which produces calcium ion content in water, and salt content is about 14500ppm；
Calcium ion content is about 2700ppm in the second level nanofiltration concentrated water, and salt content is about 29500ppm；
To washing dilution tank 3, second level nanofiltration produces water and enters the progress reverse osmosis of reverse osmosis units 7 the second level nanofiltration concentrate recirculation
Saturating concentration, obtains reverse osmosis freshwater and reverse osmosis concentrated water；Salt content is about 30000ppm in the reverse osmosis concentrated water；
The reverse osmosis freshwater enters reuse water tank 8 and is collected rear reuse, and the reverse osmosis concentrated water is through reverse osmosis concentrated water
Case 9 enters electrodialysis cell 10 and carries out electrodialysis concentration, electrodialysis fresh water and electrodialysis concentrated water；In the electrodialysis concentrated water
Salt content is about 150000ppm；
The electrodialysis fresh water is back to reverse osmosis units 7, and the electrodialysis concentrated water enters through electrodialysis concentrated water case 11 to be tied
Brilliant unit 12 carries out crystallization treatment, obtains sodium chloride crystal salt (purity 97% reaches country-level Nacl standard)；It is described
The condensed water used in crystallization, which enters after reuse water tank 8 is collected, to be back in production.
Embodiment 2
Pilot experiment equally is carried out to desulfurization wastewater in embodiment 1, specific as follows:
Salt content is about 27000ppm in the three headers water outlet of factory's desulfurization wastewater, and calcium ion content is about 4500ppm, magnesium
Ion concentration is about 700ppm；
The three headers water outlet 0.5t of above-mentioned desulfurization wastewater is entered into dosing reaction settling basin 1 by immersible pump, 15kg is added
Sodium sulphate, 2kg milk of lime and flocculant (content of flocculant is about 5ppm in guarantee system), are stirred 30min, then into
Row precipitation process 4h；After the completion of the precipitation process, gained supernatant (calcium ion content is about 2000ppm) enters filter element
2, which are filtered processing, (specifically uses hyperfiltration treatment, can generate a small amount of backwash, ejected wash water in the treatment process, be back to dosing
In reaction settling basin 1), it obtains filtering and produces water；
It is described filtering produce water enter washing dilution tank 3 with tap water carry out washing dilution (tap water and filtering produce water body
Product is than being 0.5:1), it obtains dilute filtration and produces water；
The dilute filtration production water enters the progress of level-one nano-filtration unit 4 level-one nanofiltration processing, and (used nanofiltration membrane is table
The nanofiltration membrane of face bear electricity), add antisludging agent (content of antisludging agent is about 5ppm in guarantee system) to run, when cycles of concentration reaches
After 1.5, stop level-one nanofiltration processing, obtains level-one nanofiltration concentrated water and level-one nanofiltration produces water；The level-one nanofiltration produce in water calcium from
Sub- content is about 500ppm, and salt content is about 15600ppm；Calcium ion content is about 2400ppm in the level-one nanofiltration concentrated water,
Salt content is about 21000ppm；
The level-one nanofiltration concentrate recirculation is to dosing reaction settling basin 1 (under being added later into dosing reaction settling basin 1
A batch of three header is discharged 0.5t, and first oxidizer abolishes antisludging agent, and sodium sulphate 5kg, milk of lime 2kg and flocculation are added later
Agent 5ppm carry out next batch treatment process), level-one nanofiltration produce water through level-one nanofiltration water producing tank 5 enter second level nano-filtration unit 6 into
Row second level nanofiltration processing (nanofiltration membrane that used nanofiltration membrane is surface lotus positive electricity) stops two after the rate of recovery reaches 90%
Grade nanofiltration processing, obtains second level nanofiltration concentrated water and second level nanofiltration produces water；The second level nanofiltration produces calcium ion content in water
160ppm, salt content are about 14100ppm；Calcium ion content is about 3600ppm in the second level nanofiltration concentrated water, and salt content is about
29000ppm；
To dosing reaction settling basin 1, second level nanofiltration produces water and enters the progress of reverse osmosis units 7 the second level nanofiltration concentrate recirculation
Reverse osmosis concentration processing, obtains reverse osmosis freshwater and reverse osmosis concentrated water；Salt content is about 30000ppm in the reverse osmosis concentrated water；
The reverse osmosis freshwater enters reuse water tank 8 and is collected rear reuse, and the reverse osmosis concentrated water is through reverse osmosis concentrated water
Case 9 enters electrodialysis cell 10 and carries out electrodialysis concentration, electrodialysis fresh water and electrodialysis concentrated water；In the electrodialysis concentrated water
Salt content is about 150000ppm；
The electrodialysis fresh water is back to reverse osmosis units 7, and the electrodialysis concentrated water enters through electrodialysis concentrated water case 11 to be tied
Brilliant unit 12 carries out crystallization treatment, obtains sodium chloride crystal salt (purity 96% reaches country-level Nacl standard)；It is described
The condensed water used in crystallization, which enters after reuse water tank 8 is collected, to be back in production.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these improve and
Retouching also should be regarded as the protection scope of the utility model.
Claims (6)
1. a kind of processing unit of desulfurization wastewater, which is characterized in that including
Dosing reaction settling basin (1)；
The filter element (2) being connected to the water outlet of the dosing reaction settling basin (1)；
The washing dilution tank (3) being connected to the water outlet of the filter element (2)；
With the level-one nano-filtration unit (4) that is connected to of water outlet of washing dilution tank (3), the level-one nano-filtration unit (4) it is dense
Water out is connected to the dosing reaction settling basin (1)；Nanofiltration membrane in the level-one nano-filtration unit (4) is surface bear electricity
Nanofiltration membrane；
The second level nano-filtration unit (6) being connected to the production water out of the level-one nano-filtration unit (4), the second level nano-filtration unit (6)
Concentrated water outlet with the dosing reaction settling basin (1) and wash dilution tank (3) be connected to；In the second level nano-filtration unit (6)
Nanofiltration membrane is the nanofiltration membrane of surface lotus positive electricity；
The reverse osmosis units (7) being connected to the production water out of the second level nano-filtration unit (6)；
With the electrodialysis cell (10) of the concentrated water outlet of the reverse osmosis units (7), the electrodialysis cell (10) it is light
Water out is connected to the reverse osmosis units (7)；
With the crystalline element (12) of the concentrated water outlet of the electrodialysis cell (10).
2. processing unit according to claim 1, which is characterized in that further include reuse water tank (8), the reverse osmosis units
(7) water outlet is connected to the reuse water tank (8), the condensation-water drain and the reuse water tank of the crystalline element (12)
(8) it is connected to；The reuse water tank (8) includes multiple water outlets, and one of water outlet is connected to the washing dilution tank (3).
3. processing unit according to claim 1 or 2, which is characterized in that it further include level-one nanofiltration water producing tank (5), it is described
Level-one nanofiltration water producing tank (5) is set between the level-one nano-filtration unit (4) and second level nano-filtration unit (6).
4. processing unit according to claim 1 or 2, which is characterized in that it further include reverse osmosis concentrated water tank (9), it is described anti-
Infiltration concentrated water case (9) is set between the reverse osmosis units (7) and electrodialysis cell (10).
5. processing unit according to claim 1 or 2, which is characterized in that further include electrodialysis concentrated water case (11), the electricity
Dialysis concentrated water case (11) is set between the electrodialysis cell (10) and crystalline element (12).
6. processing unit according to claim 1, which is characterized in that the filter element (2) reacts heavy with the dosing
Shallow lake pond is provided with return line between (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821968260.8U CN209113651U (en) | 2018-11-27 | 2018-11-27 | A kind of processing unit of desulfurization wastewater |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821968260.8U CN209113651U (en) | 2018-11-27 | 2018-11-27 | A kind of processing unit of desulfurization wastewater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109205876A (en) * | 2018-11-27 | 2019-01-15 | 杭州水处理技术研究开发中心有限公司 | A kind for the treatment of method and apparatus of desulfurization wastewater |
-
2018
- 2018-11-27 CN CN201821968260.8U patent/CN209113651U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109205876A (en) * | 2018-11-27 | 2019-01-15 | 杭州水处理技术研究开发中心有限公司 | A kind for the treatment of method and apparatus of desulfurization wastewater |
| CN109205876B (en) * | 2018-11-27 | 2024-06-07 | 杭州水处理技术研究开发中心有限公司 | Method and device for treating desulfurization wastewater |
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