CN108689539A - Dense salt wastewater zero discharge and resources apparatus and treatment process - Google Patents
Dense salt wastewater zero discharge and resources apparatus and treatment process Download PDFInfo
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- CN108689539A CN108689539A CN201710235235.2A CN201710235235A CN108689539A CN 108689539 A CN108689539 A CN 108689539A CN 201710235235 A CN201710235235 A CN 201710235235A CN 108689539 A CN108689539 A CN 108689539A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 71
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- 238000000909 electrodialysis Methods 0.000 claims abstract description 48
- 238000012545 processing Methods 0.000 claims abstract description 33
- 230000003647 oxidation Effects 0.000 claims abstract description 28
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 28
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 19
- 239000012267 brine Substances 0.000 claims abstract description 18
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims abstract description 18
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims abstract description 18
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract description 16
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- 229910052938 sodium sulfate Inorganic materials 0.000 claims abstract description 8
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- 238000007781 pre-processing Methods 0.000 claims abstract description 7
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 169
- 239000012452 mother liquor Substances 0.000 claims description 76
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- 238000001728 nano-filtration Methods 0.000 claims description 33
- 238000007711 solidification Methods 0.000 claims description 29
- 230000008023 solidification Effects 0.000 claims description 29
- 238000004064 recycling Methods 0.000 claims description 25
- 150000001768 cations Chemical class 0.000 claims description 24
- 238000001704 evaporation Methods 0.000 claims description 23
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- 239000010802 sludge Substances 0.000 claims description 22
- 239000000126 substance Substances 0.000 claims description 22
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- 238000011084 recovery Methods 0.000 claims description 16
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- 239000007800 oxidant agent Substances 0.000 claims description 11
- 238000001223 reverse osmosis Methods 0.000 claims description 11
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- 238000006297 dehydration reaction Methods 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 9
- 239000000047 product Substances 0.000 claims description 9
- 238000005341 cation exchange Methods 0.000 claims description 8
- 239000000706 filtrate Substances 0.000 claims description 8
- 239000002455 scale inhibitor Substances 0.000 claims description 8
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 7
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 7
- 239000011575 calcium Substances 0.000 claims description 7
- 229910052791 calcium Inorganic materials 0.000 claims description 7
- 239000011777 magnesium Substances 0.000 claims description 7
- 229910052749 magnesium Inorganic materials 0.000 claims description 7
- 238000001471 micro-filtration Methods 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000005374 membrane filtration Methods 0.000 claims description 6
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 claims description 5
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical class [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 5
- 239000003729 cation exchange resin Substances 0.000 claims description 5
- 239000010413 mother solution Substances 0.000 claims description 5
- 238000010795 Steam Flooding Methods 0.000 claims description 4
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- 239000002253 acid Substances 0.000 claims description 2
- 238000004458 analytical method Methods 0.000 claims description 2
- 239000003011 anion exchange membrane Substances 0.000 claims description 2
- 238000005868 electrolysis reaction Methods 0.000 claims description 2
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- 238000001556 precipitation Methods 0.000 claims description 2
- 239000003643 water by type Substances 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 abstract description 7
- 239000010703 silicon Substances 0.000 abstract description 7
- 238000001914 filtration Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 235000002639 sodium chloride Nutrition 0.000 abstract description 3
- 238000005342 ion exchange Methods 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract 1
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
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- 230000008859 change Effects 0.000 description 5
- 239000004902 Softening Agent Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 239000002910 solid waste Substances 0.000 description 4
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- 229920005989 resin Polymers 0.000 description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- 206010016326 Feeling cold Diseases 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
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- ARYKTOJCZLAFIS-UHFFFAOYSA-N hydrogen peroxide;ozone Chemical compound OO.[O-][O+]=O ARYKTOJCZLAFIS-UHFFFAOYSA-N 0.000 description 2
- 238000006385 ozonation reaction Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
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- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
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- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
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- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4693—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/425—Treatment of water, waste water, or sewage by ion-exchange using cation exchangers
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/007—Modular design
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
A kind of dense salt wastewater zero discharge and resources apparatus and treatment process, its technology characteristics includes pretreatment, film dual treatment, film concentration and four parts of sub-prime crystallization treatment, according to oxidation, filtering softening, ion exchange, film sub-prime, film concentration decrement, electrodialysis concentration, sub-prime crystallization, curing schedule processing.Its processing equipment includes pre-processing device, film dual treatment equipment, film concentration equipment and sub-prime crystallization treatment equipment.Through pipeline and liquid pump connection composition.It is an advantage of the invention that zero-emission and resource utilization device are directed to generated a large amount of brine wastes in industrial processes, after treatment, the valuable salinities such as sodium sulphate, sodium chloride, sodium nitrate are fully recycled.Organic matter, hardness, basicity, the solvable silicon in dense salt waste water are removed, realizes minimizing, the sublimate of dense salt waste water, reduce sub-prime crystallization apparatus scale and reduces sub-prime crystallization apparatus risk, overall operation cost is reduced, improves product salt quality, increase economic efficiency.
Description
Technical field
The present invention relates to a kind of environmental protection equipment and treatment process, more particularly to a kind of dense salt wastewater zero discharge and recycling are set
Standby and treatment process.
Background technology
Dense salt wastewater zero discharge is the target that the industrial trades requirement such as coal chemical industry, steel, petrochemical industry, papermaking is realized,
It is the important link of sustainable stable development.This kind of waste water usually has high organic concentration, high salinity, high rigidity, high-alkali
The features such as degree, high solvable silicon concentration, therefrom extraction recycle-water makees production water or recycles water station supplement water for general consideration, and salinity
Make security landfill as solid waste after evaporative crystallization solidification, disposal costs are quite high.In fact, containing a large amount of sulphur in salinity
The valuable Inorganic Chemicals such as sour sodium, sodium chloride, sodium nitrate utilizes in chemical industry of inorganic salt field extensively, as solid waste
Disposition is actually a kind of waste to resource.
For a long time, expensive cost of investment and operating cost are the big bottlenecks for restricting dense salt wastewater zero discharge and realizing.
To find out its cause, mainly having at 2 points:(1) although the decrement reuse method for being directed to dense salt waste water both at home and abroad now is numerous, such as reverse osmosis
Thoroughly, positive infiltration, electrodialysis, membrane distillation etc., but having certain limitation using upper, it can not independently undertake whole process processing;(2)
It is although the production technology of the valuable Inorganic Chemicals such as sodium sulphate, sodium chloride, sodium nitrate is highly developed, it is straight
When scooping out for the processing of dense salt waste water reclaiming, often due to not fully considering that the property of dense salt waste water and well mine salt water is poor
It is different, and make that there is apparent shortcoming in terms of actual processing effect and economy.
Invention content
The purpose of the present invention is being directed to defect present in prior art, a kind of dense salt wastewater zero discharge and recycling are provided
Treatment process and processing equipment for the treatment process.The present invention is effectively removed by the combination of multiple water treatment technique
Organic matter, hardness, basicity in dense salt waste water and solvable silicon, realize minimizing, the sublimate of dense salt waste water, fully recycle valuable
It is worth salinity, reduces system operation cost and operation risk, generate certain economic benefit.
The present invention treatment process include:Preprocessing part, film sub-prime part, film concentrating part and sub-prime crystalline portion four
A part.Treatment process such as the following steps of the present invention:
A. dense salt waste water is delivered to oxidation unit, the organic matter in raw water is contained by strong oxidizer oxygenolysis COD
Amount can usually be down to 30-60mg/L;
B. by Strong oxdiative treated dense salt waste water is delivered to film softening plant, dosing reaction and micro-filtrate membrane filtration are carried out,
Hardness can drop within 100mg/L, and solvable silicon can drop within 20mg/L, and softening water outlet is delivered to intermediate pool, softens
Sludge is delivered to sludge dehydration device, and after filter-press dehydration, the filter cake that press filtration is formed is disposed as common solid waste, and filtrate returns
It is mixed with former dense salt waste water, reenters the processing of this complexes;
C. pretreated dense salt waste water is delivered to cationic switch, further removes calcium, magnesium in water removal etc. two
Valence cation, hardness can drop within 5mg/L, and water outlet is delivered to cation and exchanges discharge bay;
D. the water outlet after cation being exchanged is delivered to nano filter membrance device, isolated containing most of monovalence salinity and small portion
Divide the divalent brine of the monovalence brine and the salinity of monovalence containing fraction and most of divalent salinity of divalent salinity
E. monovalence brine is delivered to hyperconcetration device and is further reduced concentration, salt content is made to reach 8-10%, COD reaches
Divalent brine is delivered to electrodialysis plant and is further reduced concentration, salt content is made to reach 15-18%, COD by 100-200mg/L
Reach 200-400mg/L, electrodialytic fresh water is returned to be mixed with former dense salt waste water, reenters the processing of this complexes;
F. hyperconcetration concentrated water is delivered to 1# sub-prime crystallization apparatus, isolates the valuable salinity such as sodium chloride, sodium nitrate, steamed
Lime set of feeling cold is discharged into condensation pond, and a small amount of mother liquor is discharged into mother liquor pond, and product salt yield is made to reach 95-98%, and evaporation condensate is received
Rate reaches 95-98%, and mother liquor amount reaches 2-5%;
G. electrodialysis concentrated water is delivered to 2# sub-prime crystallization apparatus, isolates the valuable salinity such as sodium sulphate, evaporative condenser
Liquid is discharged into condensation pond, and a small amount of mother liquor, which is discharged into mother liquor pond, makes product salt yield reach 95-98%, and evaporative condenser liquid yield reaches
95-98%, mother liquor amount reach 2-5%;
H. mother liquor is delivered to mother liquor solidification equipment, makees security landfill processing after solidification.Arrange outside the mother liquor centrally dispose or
When mother liquor all recycles, mother liquor is delivered to outer row and selects or dense salt wastewater equalization pond.
Flushing, chemical cleaning, regeneration water in each processing step are provided by the self-produced water of this equipment, periodically
The chemical cleaning regeneration discharge water of generation is recycled to pretreatment unit.
The present invention also provides the processing equipments for dense salt wastewater zero discharge and the treatment process of recycling, including locate in advance
Equipment, film dual treatment equipment, film concentration equipment and sub-prime crystallization treatment equipment are managed, each equipment room is through pipeline and liquid pump
Connection.
It is characterized in that the pre-processing device is:Dense salt waste water storage carries out water quality water in dense salt wastewater equalization pond 101
Amount is adjusted, and regulating reservoir water outlet is connect by pipeline and regulating reservoir elevator pump 106 with the water inlet of oxidation unit 102, oxidation dress
It sets and is equipped with strong oxidizer throwing device 109 in 102, add strong oxidizer and aoxidized.102 water outlet of oxidation unit passes through pipeline
It is connected to film softening plant 103 with film softening plant intake pump 107, film softening plant 103 is equipped with softening medicament addition device, adds
Different softening agents remove calcium, magnesium, bicarbonate radical, carbonate plasma and the solvable silicon compound in water removal.Film softening plant 103 goes out
Water enters intermediate pool 104 by pipeline and middle water pump 108, and 103 sludge of film softening plant is by mud mouth through pumping to dirt
The processing of mud processing unit 105.The cleaning inlet and outlet of film softening plant 103 are gone out with chemically-cleaning device 110 respectively by pipeline
Mouth is connected with import, after filter membrane is contaminated, can carry out chemical cleaning, it can be used repeatedly for cleaning solution until failure.It is intermediate
104 water outlet of pond exchanges intake pump 205 by the cation of pipeline and film dual treatment equipment and connects the water outlet of pretreatment workshop section
Zhiyang ion interchange unit 201 further removes the bivalent cations such as calcium, the magnesium in water removal.
Film dual treatment equipment is:The selection of cationic switch 201 is suitable for the macropore weak acid tree of micro-polluted water softening
Fat, improves the contamination resistance of cationic switch, and water outlet is connected to cation by pipeline and exchanges discharge bay 202.Sun from
Sub- switch 201 adds regeneration after resin adsorption is saturated equipped with regenerating unit 211 by regenerative agent throwing device 210
Agent is regenerated, and regenerated liquid drains into dense salt wastewater equalization pond 101.The water outlet that cation exchanges discharge bay 202 passes through pipe
Road and nanofiltration intake pump 206 are connect with the water inlet of cartridge filter 203, another water outlet passes through pipeline and regeneration water pump
212 connect with the water inlet of regenerating unit 211.The outlet of cartridge filter 203 passes through pipeline and nanofiltration high-pressure pump 209 and nanofiltration
The water inlet of device 204 connects, and for dense salt waste water after nanofiltration sub-prime, most of monovalence salinity and fraction divalent salinity enter one
In valence brine, fraction monovalence salinity and most of divalent salinity enter in divalent brine.The water inlet of nanofiltration device 204 passes through
Pipeline is connect with the outlet of scale inhibitor feeding device 209, and when NF membrane is run, film can be effectively relieved by suitably adding antisludging agent
The cleaning inlet and outlet that situation nanofiltration device 204 is blocked up in dirt are connect with the export and import of chemically-cleaning device 210 respectively by pipeline,
After NF membrane is contaminated, chemical cleaning can be carried out, it can be used repeatedly for cleaning solution until failure.The production water of nanofiltration device 204
Mouth is connect by the hyperconcetration intake pump 308 of pipeline and film concentration equipment with cartridge filter 301.
Film concentration equipment is:The outlet of cartridge filter 301 passes through pipeline and hyperconcetration high-pressure pump 309 and hyperconcetration
The water inlet of device 302 connects, and monovalence brine is further concentrated into salt content 8-10%, design recycling through hyperconcetration device 302
Rate >=75%.The production mouth of a river of hyperconcetration device 302 is connected to reuse pool 304 by pipeline, and concentrated water spout is connected to super dense by pipeline
Reduced concentration pond 303.The water inlet that the concentrated water spout of nanofiltration device 204 passes through pipeline and electrodialysis intake pump 310 and cartridge filter 305
Mouth connection.The outlet of cartridge filter 305 is connected to the water inlet of electrodialysis plant 306 by pipeline, and divalent brine is through electrodialysis
Device 306 is further concentrated into salt content 15-18%, designs the rate of recovery >=85%.The fresh water mouth of electrodialysis plant 306 passes through pipe
Road and fresh water circulating pump are connect with fresh-water tank, and the outlet of fresh-water tank by pipeline and is connected to dense salt wastewater equalization pond 101.Electrodialysis
The concentrated water spout of device 306 is connect by pipeline and concentrated water circulating pump with concentrated water case, and the outlet of concentrated water case is connected to electric osmose by pipeline
Analyse concentrated water pond 307.The Butterworth Hatch of hyperconcetration device 302 and electrodialysis plant 306 respectively with the outlet of chemically-cleaning device 311 and
Import connects, and after reverse osmosis membrane and contaminated ionic membrane, can carry out chemical cleaning, it can be used repeatedly for cleaning solution until losing
Effect.The water inlet of hyperconcetration device 302 is connect by pipeline with the outlet of scale inhibitor feeding device 312, when reverse osmosis membrane is run
When, the stifled situation of film dirt can be effectively relieved by suitably adding antisludging agent.
Sub-prime crystallization treatment equipment is:The outlet in hyperconcetration concentrated water pond 303 passes through pipeline and sub-prime crystallization treatment equipment
1# intake pumps 403 are connected to 1# sub-primes crystallization apparatus 401, through evaporative crystallization or evaporative crystallization and crystallisation by cooling group technology, separation
Go out the valuable monovalence salinity such as sodium chloride, sodium nitrate.Evaporation condensate is discharged into condensed water by pipeline and 1# condensate pumps 407
Pond 409, a small amount of mother liquor are discharged into mother liquor pond 410 by pipeline and 1# mother liquors pump 405.The outlet in electrodialysis concentrated water pond 307 passes through pipe
Road and 2# intake pumps 404 are connected to 2# sub-primes crystallization apparatus 402, through evaporative crystallization or evaporative crystallization and crystallisation by cooling group technology,
The valuable divalent salinity such as sodium sulphate is isolated, evaporation condensate is discharged into condensation pond by pipeline and 2# condensate pumps 408
409, a small amount of mother liquor is discharged into mother liquor pond 410 by pipeline and 2# mother liquors pump 406.The one outlet in mother liquor pond 410 by pipeline and
Recycling Mother Solution pump 413 is connected to dense salt wastewater equalization pond 101, another outlet in mother liquor pond 410 by pipeline and mother liquor cure into
Water pump 412 is connect with mother liquor solidification equipment 411, makees security landfill processing after solidification.1# sub-primes crystallization apparatus 401,2# sub-prime knots
The Butterworth Hatch of brilliant device 402 and mother liquor solidification equipment 411 is connect with the export and import of chemically-cleaning device 414 respectively, when 1#,
When 2# sub-primes crystallization apparatus and mother liquor solidification equipment evaporation capacity reduction or heat transfer efficiency reduction occur because of equipment scaling, it can be changed
Cleaning is learned, it can be used repeatedly for cleaning solution until failure.
The advanced oxidation device 102 be ozone series of oxidation complete set of equipments, as ozone oxidation, ozone hydrogen peroxide oxidation,
Catalytic ozonation etc. or catalytic and oxidative electrolysis technology complete set of equipments or activated carbon adsorption complete set of equipments.
The film softening plant 103 is softening precipitation microfiltration membranes complete set of equipments, and the reaction tank containing softening, softening agent add and be
System, tube microfiltration membrane device, sludge concentration tank, 0.1 micron of micro-filtrate membrane filtration precision <.Before the water outlet of film softening plant 103
Equipped with pH value regulating mechanism.
The sludge dehydration device 105 is plate compression complete set of equipments, pond containing sewage sludge storage, sludge feed pump, sheet frame pressure
Filter, storage bucket, compressed air reservoir, design dewatered sludge moisture content≤65%.
The cation exchange resin of the cation switch 201 is to be adsorbed suitable for bivalent cation and be resistant to height
The macropore weak-type cation exchange resin of COD, the device are twin columns, are run in parallel or series.
The NF membrane of the nanofiltration device 204 is that one divalent of high-precision detaches nanofiltration membrane component, one or more levels series connection, if
The meter production water rate of recovery >=75%, the monovalent salt rate of recovery >=75%, the divalent salts rate of recovery >=95%.
The hyperconcetration device 302 is by two kinds in low pressure reverse osmosis device, high pressure reverse osmosis unit and electrodialysis plant
Or three kinds be composed, plural serial stage, produces the water rate of recovery >=75%, salt rejection rate >=96%.
The ionic membrane of the electrodialysis plant 306 is one group of highly selective cation-exchange membrane and anion-exchange membrane.It returns
Yield >=85%, concentrated water salt content 15-18%.
The 1# sub-primes crystallization apparatus 401 and 2# sub-primes crystallization apparatus 402 are that sub-prime crystallizes complete set of equipments, which is to steam
Vapour drives Multi-effect evaporation crystallizer (MEE) or steam mechanical recompression crystallizing evaporator (MVR) or steam power recompression evaporation
Crystallizer (TVR) or with guide shell cooler crystallizer (DTB).Product salt yield >=95%.
The mother liquor solidification equipment 411 is single effect evaporation crystallizer, such as raw steam drive single effect evaporation crystallizer, band folder
Cover enamel autoclave crystallizing evaporator.
The front and back on-position of the advanced oxidation device 102 and film softening plant 103 can be according to the water quality situation of raw water
Setting
The mother liquor solidification equipment (411), which arranges to omit under the situation centrally disposed outside mother liquor, not to be had to.
It is an advantage of the invention that zero-emission and resource utilization device are directed to coal chemical industry, steel, petrochemical industry, papermaking
Etc. the generated dense salt waste water of waste water in production processes, after advanced oxidation, film sub-prime, film concentration and sub-prime crystallization treatment,
The fully valuable salinity such as recycling sodium sulphate, sodium chloride, sodium nitrate.By the combination of multiple water treatment technique, effectively improve dense
The treatment effect of salt waste water removes organic matter, hardness, basicity, solvable silicon in dense salt waste water, realizes the decrement of dense salt waste water
Change, sublimate, reduce sub-prime crystallization apparatus scale and reduction sub-prime crystallization apparatus risk to realize, reduce overall operation cost,
Product salt quality is improved, is increased economic efficiency.
Description of the drawings
The process frame chart of Fig. 1 present invention;
The structural schematic diagram of Fig. 2 present invention.
In figure:101 dense salt wastewater equalization ponds, 102 oxidation units, 103 film softening plants, 104 intermediate pools, 105 sludge
Dehydration device, 106 regulating reservoir elevator pumps, 107 films softening intake pump, 108 middle water pumps, 109 strong oxidizer throwing devices, 110
Chemically-cleaning device, 201 cationic switches, 202 cations exchange discharge bays, 203 cartridge filters, 204 nanofiltration devices,
205 cations exchange intake pump, 206 nanofiltration intake pumps, 207 nanofiltration high-pressure pumps, 208 chemically-cleaning devices, 209 scale inhibitor dosings
Device, 210 regenerative agent throwing devices, 211 regenerating units, 212 regeneration water pumps, 301 cartridge filters, 302 hyperconcetration devices,
303 hyperconcetration concentrated water ponds, 305 cartridge filters, 306 electrodialysis plants, 307 electrodialysis concentrated water ponds, 308 surpass 304 reuse pools
Concentrate intake pump, 309 hyperconcetration high-pressure pumps, 310 electrodialysis intake pumps, 311 chemically-cleaning devices, 312 scale inhibitor feeding devices,
401 1# sub-primes crystallization apparatus, 402 2# sub-primes crystallization apparatus, 403 1# intake pumps, 404 2# intake pumps, 405 1# mother liquors pump,
406 2# mother liquors pump, 407 1# condensate pumps, 408 2# condensate pumps, 409 condensation ponds, 410 mother liquor ponds, the solidification of 411 mother liquors
Device, 412 mother liquors solidification intake pump 413, Recycling Mother Solution pump, 414 chemically-cleaning devices.
Specific implementation mode
Embodiment one
The embodiment further illustrated the present invention below in conjunction with the accompanying drawings:
By dense salt wastewater equalization pond 101, oxidation unit 102, film softening plant 103, intermediate pool in preprocessing part
104, sludge dehydration device 105, regulating reservoir elevator pump 106, film softening intake pump 107, middle water pump 108, strong oxidizer add
Device 109, chemically-cleaning device 110 are formed by connecting through pipeline.
Discharge bay 202 is exchanged by cationic switch 201, cation in film sub-prime part, cartridge filter 203, is received
Filter device 204, cation exchanges intake pump 205, nanofiltration intake pump 206, nanofiltration high-pressure pump 207, chemically-cleaning device 208, hinders
Dirty agent throwing device 209, regenerative agent throwing device 210, regenerating unit 211, regeneration water pump 212 are formed by connecting through pipeline.
By cartridge filter 301, hyperconcetration device 302, hyperconcetration concentrated water pond 303, reuse pool in film concentrating part
304, cartridge filter 305, electrodialysis plant 306, electrodialysis concentrated water pond 307, hyperconcetration intake pump 308, hyperconcetration high-pressure pump
309, electrodialysis intake pump 310, chemically-cleaning device 311, scale inhibitor feeding device 312 are formed by connecting through pipeline.
In sub-prime crystalline portion by 1# sub-primes crystallization apparatus 401,2# sub-primes crystallization apparatus 402,1# intake pumps 403,2# into
Water 404,1# mother liquors pump 405,2# mother liquors pump 406,1# condensate pumps 407,2# condensate pumps 408, condensation pond 409, mother liquor pond
410, mother liquor solidification equipment 411, mother liquor solidification intake pump 412, Recycling Mother Solution pump 413, chemically-cleaning device 414 are connected through pipeline
It forms.Referring to Fig. 2.
The present embodiment is made of four preprocessing part, film sub-prime part, film concentrating part, sub-prime crystalline portion parts.
Referring to Fig. 1.
In preprocessing part, dense salt waste water storage carries out water quality and quantity adjusting in dense salt wastewater equalization pond 101, and regulating reservoir goes out
The mouth of a river is connect by pipeline and regulating reservoir elevator pump 106 with the water inlet of oxidation unit 102, oxidation unit 102 be ozone system
Row advanced oxidation complete set of equipments, such as ozone oxidation, ozone hydrogen peroxide oxidation, catalytic ozonation or electrolytic catalysis oxygen
It is melted into complete equipment or activated carbon adsorption complete set of equipments.In addition, traditional Fenton, heterocatalysis also can be used, which is at being arranged
It is standby.Oxidation unit 102 is equipped with strong oxidizer throwing device 109, adds strong oxidizer and is aoxidized.102 water outlet of higher-level device
It is connected to film softening plant 103 by pipeline, film softening plant 103 is that softening precipitates microfiltration membranes complete set of equipments, the reaction tank containing softening,
Softening agent dosing system, tube microfiltration membrane device, sludge concentration tank, 0.1 micron of micro-filtrate membrane filtration precision <.Film softening plant
PH value regulating mechanism is equipped with before 103 water outlet.Add calcium, magnesium, bicarbonate radical, carbonate etc. that different softening agents are gone in water removal
Ion and solvable silicon compound.The water outlet of film softening plant 103 enters intermediate pool 104 by pipeline and middle water pump 108, and film is soft
Makeup sets 103 sludge by mud mouth through pumping to the processing of sludge treatment equipment 105.The cleaning of film softening plant 103 is imported and exported
It is connect with the export and import of chemically-cleaning device 110 by pipeline, after filter membrane is contaminated, can be carried out chemical clear respectively
It washes, it can be used repeatedly for cleaning solution until failure.The residence time of dense salt wastewater equalization pond 101, strong oxidizer throwing device 109
Dosage and pH value, the dosage of softening medicament and pH tone pitches in film softening plant 103, concentration of suspension, micro-filtration membrane flux,
The membrane area and turbidity of water outlet, SDI and hardness will have different values with different raw water qualities.The chemical cleaning medicament of microfiltration membranes
Type and dosage, cleaning frequency etc. also change with the variation of raw water.Advanced oxidation device 102 and film softening plant 103
Front and back on-position can be arranged according to the water quality situation of raw water, and the present embodiment is the connection method of Fig. 2.Sludge dehydration device 105
For plate compression complete set of equipments, pond containing sewage sludge storage, sludge feed pump, plate and frame filter press, storage bucket, compressed air reservoir, if
Count dewatered sludge moisture content≤65%.
In film sub-prime part, 104 water outlet of intermediate pool exchanges intake pump 205 by pipeline and cation will pre-process work
Section water outlet is connected to cationic switch 201, further removes the bivalent cations such as calcium, the magnesium in water removal, and cation exchanges
The cation exchange resin of device 201 is the macropore weak-type cation that high COD is adsorbed and be resistant to suitable for bivalent cation
Exchanger resin, to improve the contamination resistance of cationic switch.The device is twin columns, is run in parallel or series.Water outlet
It is connected to cation by pipeline and exchanges discharge bay 202.Cationic switch 201 is equipped with regenerating unit 211, when resin is saturated
Afterwards, regenerative agent is added by regenerative agent throwing device 210, is regenerated, regenerated liquid drains into dense salt wastewater equalization pond 101.Sun from
Ion exchange capacity, regenerative agent type, dosage and the regeneration frequency of sub- switch 201, the membrane flux of nanofiltration device 204, film
Area and operating pressure will have different values with different raw water qualities.The antisludging agent of NF membrane, the type of chemical cleaning medicament
Also change with the variation of raw water with dosage, cleaning frequency etc..The NF membrane of nanofiltration device 204 is that high-precision one divalent separation is received
Filter membrane component, one or more levels series connection, the design production water rate of recovery >=75%, the monovalent salt rate of recovery >=75%, the divalent salts rate of recovery
>=95%.The water outlet that cation exchanges discharge bay 202 passes through pipeline and nanofiltration intake pump 206 and cartridge filter 203
Water inlet connection, another water outlet connect by pipeline and regeneration water pump 212 with the water inlet of regenerating unit 211.Security personnel
The outlet of filter 203 is connect by pipeline and nanofiltration high-pressure pump 207 with the water inlet of nanofiltration device 204, and dense salt waste water is through receiving
After filtering sub-prime, most of monovalence salinity and fraction divalent salinity enter in monovalence brine, fraction monovalence salinity and major part
Divalent salinity enters in divalent brine.The water inlet of nanofiltration device 204 is connected by the outlet of pipeline and scale inhibitor feeding device 211
It connects, when NF membrane is run, the stifled situation of film dirt can be effectively relieved by suitably adding antisludging agent.The cleaning of nanofiltration device 204 passes in and out
Mouth is connect with the export and import of chemically-cleaning device 210 respectively by pipeline, after NF membrane is contaminated, can be carried out chemical clear
It washes, it can be used repeatedly for cleaning solution until failure.The production mouth of a river of nanofiltration device 204 by pipeline and hyperconcetration intake pump 308 with
Cartridge filter 301 connects, and concentrated water spout is connect by pipeline and electrodialysis intake pump 310 with cartridge filter 305.
Pass through pipeline and hyperconcetration high-pressure pump 309 and hyperconcetration device in the outlet of film concentrating part, cartridge filter 301
302 water inlet connection, hyperconcetration device 302 is by low pressure reverse osmosis device, high pressure reverse osmosis unit and electrodialysis plant
It is composed for two or three, plural serial stage, produces the water rate of recovery >=75%, salt rejection rate >=96%.Monovalence brine is filled through hyperconcetration
It sets 302 and is further concentrated into salt content 8-10%, design the rate of recovery >=75%.The production mouth of a river of hyperconcetration device 302 passes through pipeline
It is connected to reuse pool 304, concentrated water spout is connected to hyperconcetration concentrated water pond 303 by pipeline.The outlet of cartridge filter 305 passes through pipeline
It is connected to the water inlet of electrodialysis plant 306, the ionic membrane of electrodialysis plant 306 is one group of highly selective cation-exchange membrane and the moon
Amberplex.Divalent salts are further concentrated into salt content 15-18% through electrodialysis plant 306, design the rate of recovery >=85%.Electricity
The fresh water mouth of electrodialysis apparatus 306 is connect by pipeline and electrodialysis fresh water circulating pump with fresh-water tank, and the outlet of fresh-water tank passes through pipe
Road and it is connected to dense salt wastewater equalization pond 101.The concentrated water spout of electrodialysis plant 306 by pipeline and electrodialysis concentrated water circulating pump with it is dense
Water tank connects, and the outlet of concentrated water case is connected to electrodialysis concentrated water pond 307 by pipeline.Hyperconcetration device 302 and electrodialysis plant 306
Butterworth Hatch connect respectively with the export and import of chemically-cleaning device 311, can be into after reverse osmosis membrane and contaminated ionic membrane
Row chemical cleaning.The water inlet of hyperconcetration device 302 is connect by pipeline with the outlet of scale inhibitor feeding device 312, and reverse osmosis is worked as
When permeable membrane is run, the stifled situation of film dirt can be effectively relieved by suitably adding antisludging agent.The film type and combination shape of hyperconcetration device 302
Formula, membrane flux, membrane area and operating pressure will have different values with different raw water qualities.The membrane area of electrodialysis plant 306,
Current density, fresh water salt content will have different values with different raw water qualities.Antisludging agent, the chemical cleaning medicine of above-mentioned various films
The type and dosage of agent, cleaning frequency etc. also change with the variation of raw water.
1# sub-prime knots are connected to by pipeline and 1# intake pumps 403 in the outlet of sub-prime crystalline portion, hyperconcetration concentrated water pond 303
It is valuable to isolate sodium chloride, sodium nitrate etc. through evaporative crystallization or evaporative crystallization and crystallisation by cooling group technology for brilliant device 401
Monovalence salinity, evaporation condensate is discharged into condensation pond 409 by pipeline and 1# condensate pumps 407, and a small amount of mother liquor passes through pipeline
It is discharged into mother liquor pond 410 with 1# mother liquors pump 405.The outlet in electrodialysis concentrated water pond 307 is connected to 2# points by pipeline and 2# intake pumps 404
Matter crystallization apparatus 402 isolates sodium sulphate etc. valuable two through evaporative crystallization or evaporative crystallization and crystallisation by cooling group technology
Valence salinity, evaporation condensate are discharged into condensation pond 409 by pipeline and 2# condensate pumps 408, and a small amount of mother liquor passes through pipeline and 2#
Mother liquor pump 406 is discharged into mother liquor pond 410.The one outlet in mother liquor pond 410 is connected to dense salt waste water by pipeline and Recycling Mother Solution pump 413
Another outlet of regulating reservoir 101, mother liquor pond 410 is connect by pipeline and mother liquor solidification pump 412 with mother liquor solidification equipment 411,
Make security landfill processing after solidification.Mother liquor solidification equipment 411 is single effect evaporation crystallizer, such as raw steam drive single effect evaporation knot
Brilliant device, jacketed enamel autoclave crystallizing evaporator.The present embodiment is made a living steam drive single effect evaporation crystallizer.1# sub-primes crystallization dress
Set the Butterworth Hatch of 401,2# sub-primes crystallization apparatus 402 and mother liquor solidification equipment 411 respectively with the outlet of chemically-cleaning device 414 and
Import connects, when 1#, 2# sub-prime crystallization apparatus and mother liquor solidification equipment reduce or heat transfer efficiency because evaporation capacity occurs in equipment scaling
When reduction, chemical cleaning can be carried out, it can be used repeatedly for cleaning solution until failure.1# sub-primes crystallization apparatus 401 and 2# sub-prime knots
Brilliant device 402 is that sub-prime crystallizes complete set of equipments, which is or steam mechanical recompresses crystallizing evaporator (MVR) or steam power
Recompress crystallizing evaporator (TVR) or with guide shell cooler crystallizer (DTB).Product salt yield >=95%.The present embodiment is to steam
Vapour drives Multi-effect evaporation crystallizer (MEE).
The evaporation capacity of 1# sub-primes crystallization apparatus 401 and 2# sub-prime crystallization apparatus, heat exchange area, mother liquor amount are with different raw waters
Water quality will have different values.Evaporation capacity, the heat exchange area of mother liquor solidification equipment 411 will also have with different raw water qualities different
Value.It arranges outside the mother liquor and centrally disposes or when mother liquor all recycles, mother liquid flow rate also will have different values with different raw water qualities.
By taking the pending dense salt waste water of typical coal chemical industry Zero emission device as an example, amount of inlet water 60m3/ h, salt content 1.7%,
COD300mg/L, total hardness 1000mg/L, total alkalinity 2000mg/L, solvable silicon 120mg/L, by this zero-emission and recycling profit
After process, Nacl yield > 95%, recycle-water yield > 90%, system overall operation cost < 18 are finally obtained
Member/m3。
The treatment process of the present embodiment includes the following steps:
A. dense salt waste water is delivered to oxidation unit, the organic matter in raw water is contained by strong oxidizer oxygenolysis COD
Amount can usually be down to 30-60mg/L;
B. by Strong oxdiative treated dense salt waste water is delivered to film softening plant, dosing reaction and micro-filtrate membrane filtration are carried out,
Hardness can drop within 100mg/L, and solvable silicon can drop within 20mg/L, and softening water outlet is delivered to intermediate pool, softens
Sludge is delivered to sludge dehydration device, and after filter-press dehydration, the filter cake that press filtration is formed is disposed as common solid waste, and filtrate returns
It is mixed with former dense salt waste water, reenters the processing of this complexes;
C. pretreated dense salt waste water is delivered to cationic switch, further removes calcium, magnesium in water removal etc. two
Valence cation, hardness can drop within 5mg/L, and water outlet is delivered to cation and exchanges discharge bay;
D. the water outlet after cation being exchanged is delivered to nano filter membrance device, isolated containing most of monovalence salinity and small portion
Divide the divalent brine of the monovalence brine and the salinity of monovalence containing fraction and most of divalent salinity of divalent salinity
E. monovalence brine is delivered to hyperconcetration device and is further reduced concentration, salt content is made to reach 8-10%, COD reaches
Divalent brine is delivered to electrodialysis plant and is further reduced concentration, salt content is made to reach 15-18%, COD by 100-200mg/L
Reach 200-400mg/L, electrodialytic fresh water is returned to be mixed with former dense salt waste water, reenters the processing of this complexes;
F. hyperconcetration concentrated water is delivered to 1# sub-prime crystallization apparatus, isolates the valuable salinity such as sodium chloride, sodium nitrate, steamed
Lime set of feeling cold is discharged into condensation pond, and a small amount of mother liquor is discharged into mother liquor pond, and product salt yield is made to reach 95-98%, and evaporation condensate is received
Rate reaches 95-98%, and mother liquor amount reaches 2-5%;
G. electrodialysis concentrated water is delivered to 2# sub-prime crystallization apparatus, isolates the valuable salinity such as sodium sulphate, evaporative condenser
Liquid is discharged into condensation pond, and a small amount of mother liquor, which is discharged into mother liquor pond, makes product salt yield reach 95-98%, and evaporative condenser liquid yield reaches
95-98%, mother liquor amount reach 2-5%;
H. mother liquor is delivered to mother liquor solidification equipment, makees security landfill processing after solidification.Arrange outside the mother liquor centrally dispose or
When mother liquor all recycles, mother liquor is delivered to outer row and selects or dense salt wastewater equalization pond.
Flushing, chemical cleaning, regeneration water in each processing step are provided by the self-produced water of this equipment, periodically
The chemical cleaning regeneration discharge water of generation is recycled to pretreatment unit.
Embodiment two
The present embodiment is identical as embodiment one, except that nanofiltration device 204 is monovalence selectivity ion membrane electrodialysis
Device, concentrated water are monovalent salt concentrate, and salt content 10-15%, concentrated water spout is connected to 1# sub-primes by pipeline and 1# intake pumps 403
Crystallization apparatus 403.Electrodialysis fresh water is one, divalent desalinization liquor, and salt content will have different values, fresh water with different raw water qualities
Mouth is connect by pipeline and hyperconcetration intake pump 308 with the water inlet of cartridge filter 301.The outlet in hyperconcetration concentrated water pond 303
It is connected to 2# sub-primes crystallization apparatus 402 by pipeline and 2# intake pumps 404.The omission of electrodialysis plant 305 does not have to.
Embodiment three
The present embodiment is identical as embodiment one, except that film softening plant 103 is traditional medicament softening process, i.e., it is soft
Change reaction tank+settling pond+V-type filter+ultrafiltration apparatus.
Claims (14)
1. a kind of dense salt wastewater zero discharge and recycling treatment process, including pretreatment, film dual treatment, film concentration and point
Four parts of matter crystallization treatment, it is characterised in that treatment process includes the following steps:
A. dense salt waste water is delivered to oxidation unit, the organic matter in raw water is passed through into strong oxidizer oxygenolysis;
B. by treated, dense salt waste water is delivered to film softening plant, carries out dosing reaction and micro-filtrate membrane filtration, and softening water outlet is defeated
It send to intermediate pool, softening sludge is delivered to sludge dehydration device;
C. pretreated dense salt waste water is delivered to cationic switch, further removes the divalent such as calcium, the magnesium in water removal sun
Ion, water outlet are delivered to cation and exchange discharge bay;
D. the water outlet after cation being exchanged is delivered to nano filter membrance device;
E. monovalence brine is delivered to hyperconcetration device and is further reduced concentration, divalent brine is delivered to electrodialysis plant into one
Step decrement concentration;
F. hyperconcetration concentrated water is delivered to 1# sub-prime crystallization apparatus, isolates the valuable salinity such as sodium chloride, sodium nitrate, evaporation is cold
Lime set is discharged into condensation pond, and a small amount of mother liquor is discharged into mother liquor pond;
G. electrodialysis concentrated water is delivered to 2# sub-prime crystallization apparatus, isolates the valuable salinity such as sodium sulphate, evaporation condensate row
Enter and condense pond, a small amount of mother liquor, which is discharged into mother liquor pond, makes product salt yield reach 95-98%, and evaporative condenser liquid yield reaches 95-
98%, mother liquor amount reaches 2-5%;
H. mother liquor is delivered to mother liquor solidification equipment, makees security landfill processing after solidification.It arranges outside the mother liquor and centrally disposes or mother liquor
All when cycle, mother liquor is delivered to outer row and selects or dense salt wastewater equalization pond.
2. dense salt wastewater zero discharge according to claim 1 and recycling treatment process, it is characterised in that each technique
Flushing, chemical cleaning, regeneration water in step are provided by the self-produced water of this equipment, the chemical cleaning regeneration periodically generated
Discharge water is recycled to pretreatment unit.
3. a kind of processing equipment of dense salt wastewater zero discharge and recycling treatment process for claim 1, including pretreatment
Equipment, film dual treatment equipment, film concentration equipment and sub-prime crystallization treatment equipment, each equipment room connect through pipeline and liquid pump
It connects, it is characterised in that pre-processing device is:Dense salt wastewater equalization pond (101) water outlet through pipeline, regulating reservoir elevator pump (106) with
The water inlet of oxidation unit (102) connects, and oxidation unit (102) is equipped with strong oxidizer throwing device 109, oxidation unit (102)
Be connected to film softening plant (103) through pipeline and film softening plant intake pump (107), film softening plant (103) water outlet through pipeline and
Middle water pump (108) is connected to intermediate pool (104), and film softening plant (103) mud mouth is through pumping to sludge treatment equipment
(105), the cleaning inlet and outlet of film softening plant (103) connect with the export and import of chemically-cleaning device (110) respectively through pipeline
It connects, cation of intermediate pool (104) water outlet through pipeline and film dual treatment equipment exchanges intake pump (205) and be connected to cation
Switch (201);Film dual treatment equipment is:The water outlet of cationic switch (201) is connected to cationic friendship through pipeline
Swap out pond (202), and cationic switch (201) is equipped with regenerating unit (211), and regenerated liquid drains into dense salt wastewater equalization pond
(101), cation exchanges a water outlet of discharge bay (202) through pipeline and nanofiltration intake pump (206) and cartridge filter
(203) it connects, connection of another water outlet through pipeline and regeneration water pump (212) and regenerating unit (211), cartridge filter
(203) outlet is connect through pipeline and nanofiltration high-pressure pump (207) with nanofiltration device (204), and nanofiltration device (204) is through pipeline and resistance
The outlet of dirty agent throwing device (209) connects, the cleaning inlet and outlet of nanofiltration device (204) through pipeline respectively with chemically-cleaning device
(208) export and import connection, hyperconcetration water inlet of the production mouth of a river through pipeline and film concentration equipment of nanofiltration device (204)
Pump (308) is connect with cartridge filter (301);
Film concentration equipment is:The outlet of cartridge filter (301) is filled through pipeline and hyperconcetration high-pressure pump (309) with hyperconcetration
(302) connection is set, the production mouth of a river of hyperconcetration device (302) is connected to reuse pool (304) through pipeline, and concentrated water spout is connected to super through pipeline
It concentrates concentrated water pond (303), the concentrated water spout of nanofiltration device (204) is through pipeline and electrodialysis intake pump (310) and cartridge filter
(305) connect, the outlet of cartridge filter (305) is connected to electrodialysis plant (306) through pipeline, electrodialysis plant (306) it is light
The mouth of a river is connect through pipeline and fresh water circulating pump with fresh-water tank, and the outlet of fresh-water tank through pipeline and is connected to dense salt wastewater equalization pond
(101), the concentrated water spout of electrodialysis plant (306) is connect through pipeline and electrodialysis circulating pump with concentrated water case, the outlet warp of concentrated water case
Pipeline is connected to electrodialysis concentrated water pond (307), the Butterworth Hatch of hyperconcetration device (302) and electrodialysis plant (306) respectively with chemistry
The export and import of cleaning device (311) connects, and the water inlet of hyperconcetration device (302) is through pipeline and scale inhibitor feeding device
(312) outlet connection;
Sub-prime crystallization treatment equipment is:1# of the outlet in hyperconcetration concentrated water pond (303) through pipeline and sub-prime crystallization treatment equipment into
Water pump (403) is connected to 1# sub-primes crystallization apparatus (401), and evaporation condensate accesses condensed water through pipeline and 1# condensate pumps (407)
Pond (409), a small amount of mother liquor outlet are discharged into mother liquor pond (410), electrodialysis concentrated water pond (307) by pipeline and 1# mother liquors pump (405)
Outlet be connected to 2# sub-primes crystallization apparatus (402) through pipeline and 2# intake pumps (404), evaporation condensate is through pipeline and 2# condensed waters
(408) access condensation pond (409) is pumped, a small amount of mother liquor outlet is discharged into mother liquor pond (410) through pipeline and 2# mother liquors pump (406), female
The one outlet of liquid pool (410) is connected to dense salt wastewater equalization pond (101), mother liquor pond (410) through pipeline and Recycling Mother Solution pump (413)
Another outlet connect with mother liquor solidification equipment (411) through pipeline and mother liquor solidification intake pump (412), 1# sub-prime crystallization apparatus
(401), the Butterworth Hatch of 2# sub-primes crystallization apparatus (402) and mother liquor solidification equipment (411) respectively with chemically-cleaning device (414)
Export and import connects.
4. the processing equipment of dense salt wastewater zero discharge and recycling according to claim 3, it is characterised in that the oxidation
Device (102) is ozone series of oxidation complete set of equipments or catalytic and oxidative electrolysis technology complete set of equipments or activated carbon adsorption complete set of equipments.
5. the processing equipment of dense salt wastewater zero discharge and recycling according to claim 3, it is characterised in that the film is soft
It is softening precipitation microfiltration membranes complete set of equipments that (103) are set in makeup, and 0.1 micron of micro-filtrate membrane filtration precision <, water outlet is equipped with pH value tune
Save mechanism.
6. the processing equipment of dense salt wastewater zero discharge and recycling according to claim 3, it is characterised in that the sludge
Dehydration device (105) is plate compression complete set of equipments, dewatered sludge moisture content≤65%.
7. the processing equipment of dense salt wastewater zero discharge and recycling according to claim 3, it is characterised in that it is described sun from
The cation exchange resin of sub- switch (201) is the macropore weak acid that high COD is adsorbed and be resistant to suitable for bivalent cation
Type cation exchange resin, the device are twin columns, are run in parallel or series.
8. the processing equipment of dense salt wastewater zero discharge and recycling according to claim 3, it is characterised in that the nanofiltration
The NF membrane of device (204) is that one divalent of high-precision detaches nanofiltration membrane component, one or more levels series connection, the production water rate of recovery >=
75%, the monovalent salt rate of recovery >=75%, the divalent salts rate of recovery >=95%.
9. the processing equipment of dense salt wastewater zero discharge and recycling according to claim 3, it is characterised in that described super dense
Compression apparatus (302) is composed of two or three in low pressure reverse osmosis device, high pressure reverse osmosis unit and electrodialysis plant,
Plural serial stage produces the water rate of recovery >=75%, salt rejection rate >=96%.
10. the processing equipment of dense salt wastewater zero discharge and recycling according to claim 3, it is characterised in that the electric osmose
The ionic membrane of analysis apparatus (306) is one group of highly selective cation-exchange membrane and anion-exchange membrane, the rate of recovery >=85%, concentrated water
Salt content 15-18%.
11. the processing equipment of dense salt wastewater zero discharge and recycling according to claim 3, it is characterised in that the 1# points
Matter crystallization apparatus (401) and 2# sub-primes crystallization apparatus (402) are that sub-prime crystallizes complete set of equipments, which steams for steam drive multiple-effect
Send out crystallizer (MEE) or steam mechanical recompression crystallizing evaporator (MVR) or steam power recompression crystallizing evaporator (TVR) or
Band guide shell cooler crystallizer (DTB), product salt yield >=95%.
12. the processing equipment of dense salt wastewater zero discharge and recycling according to claim 3, it is characterised in that the mother liquor
Solidification equipment (411) is single effect evaporation crystallizer.
13. the processing equipment of dense salt wastewater zero discharge and recycling according to claim 3, it is characterised in that described advanced
Oxidation unit (102) and the front and back on-position of film softening plant (103) can be arranged according to the water quality situation of raw water.
14. the processing equipment of dense salt wastewater zero discharge and recycling according to claim 3, it is characterised in that the mother liquor
Solidification equipment (411), which is arranged to omit under the situation centrally disposed outside mother liquor, not to be had to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710235235.2A CN108689539A (en) | 2017-04-12 | 2017-04-12 | Dense salt wastewater zero discharge and resources apparatus and treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710235235.2A CN108689539A (en) | 2017-04-12 | 2017-04-12 | Dense salt wastewater zero discharge and resources apparatus and treatment process |
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| Publication Number | Publication Date |
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| CN108689539A true CN108689539A (en) | 2018-10-23 |
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| CN110002653A (en) * | 2019-05-09 | 2019-07-12 | 麦王环境技术股份有限公司 | High-salt wastewater stable state recycling unit and technique |
| CN110590075A (en) * | 2019-10-10 | 2019-12-20 | 四川恒泰环境技术有限责任公司 | Pickle wastewater zero-discharge treatment process |
| CN113716772A (en) * | 2021-05-28 | 2021-11-30 | 清创人和生态工程技术有限公司 | Recycling and zero-discharge process for divalent salt in organic wastewater of synthetic ammonia |
| CN116891309A (en) * | 2023-06-14 | 2023-10-17 | 惠州大亚湾惠绿环保服务有限公司 | High-hardness high-salinity oily sewage treatment system |
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Application publication date: 20181023 |