CN106186437A - A kind of process technique producing the waste water manufacturing demineralized water generation in viscose rayon - Google Patents
A kind of process technique producing the waste water manufacturing demineralized water generation in viscose rayon Download PDFInfo
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- CN106186437A CN106186437A CN201610731001.2A CN201610731001A CN106186437A CN 106186437 A CN106186437 A CN 106186437A CN 201610731001 A CN201610731001 A CN 201610731001A CN 106186437 A CN106186437 A CN 106186437A
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- China
- Prior art keywords
- sodium chloride
- waste water
- enters
- sodium
- viscose rayon
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims abstract description 71
- 239000002351 wastewater Substances 0.000 title claims abstract description 55
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 36
- 229920000297 Rayon Polymers 0.000 title claims abstract description 31
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 241
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims abstract description 167
- 239000011780 sodium chloride Substances 0.000 claims abstract description 121
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims abstract description 73
- 239000000347 magnesium hydroxide Substances 0.000 claims abstract description 33
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims abstract description 33
- 235000011132 calcium sulphate Nutrition 0.000 claims description 81
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 68
- 238000001556 precipitation Methods 0.000 claims description 45
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 42
- 239000002244 precipitate Substances 0.000 claims description 42
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 42
- 235000011152 sodium sulphate Nutrition 0.000 claims description 42
- 238000011010 flushing procedure Methods 0.000 claims description 39
- 238000011084 recovery Methods 0.000 claims description 24
- 239000010413 mother solution Substances 0.000 claims description 23
- 238000001914 filtration Methods 0.000 claims description 22
- 239000000395 magnesium oxide Substances 0.000 claims description 21
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 21
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 21
- 239000002002 slurry Substances 0.000 claims description 20
- 150000002500 ions Chemical class 0.000 claims description 19
- 238000000926 separation method Methods 0.000 claims description 18
- 239000007788 liquid Substances 0.000 claims description 16
- 238000001223 reverse osmosis Methods 0.000 claims description 15
- 239000002253 acid Substances 0.000 claims description 14
- 239000012528 membrane Substances 0.000 claims description 14
- 239000012265 solid product Substances 0.000 claims description 12
- 239000000243 solution Substances 0.000 claims description 12
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 10
- 239000011777 magnesium Substances 0.000 claims description 10
- 229910052749 magnesium Inorganic materials 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 8
- 239000001110 calcium chloride Substances 0.000 claims description 8
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 8
- 239000001175 calcium sulphate Substances 0.000 claims description 8
- WBZKQQHYRPRKNJ-UHFFFAOYSA-L disulfite Chemical compound [O-]S(=O)S([O-])(=O)=O WBZKQQHYRPRKNJ-UHFFFAOYSA-L 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 5
- 238000009835 boiling Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 239000011734 sodium Substances 0.000 claims description 5
- 229910052708 sodium Inorganic materials 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 239000010842 industrial wastewater Substances 0.000 abstract description 4
- 238000004065 wastewater treatment Methods 0.000 abstract description 2
- 235000002639 sodium chloride Nutrition 0.000 description 112
- 235000011121 sodium hydroxide Nutrition 0.000 description 20
- 150000003839 salts Chemical class 0.000 description 9
- 239000013078 crystal Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 4
- 239000012267 brine Substances 0.000 description 3
- 239000013522 chelant Substances 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 238000001728 nano-filtration Methods 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 3
- 239000006228 supernatant Substances 0.000 description 3
- 208000004434 Calcinosis Diseases 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 238000010612 desalination reaction Methods 0.000 description 2
- 238000005370 electroosmosis Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 235000012254 magnesium hydroxide Nutrition 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- CUGZTZSJLKHQGS-UHFFFAOYSA-M [Na+].[SH-].OS(O)(=O)=O Chemical compound [Na+].[SH-].OS(O)(=O)=O CUGZTZSJLKHQGS-UHFFFAOYSA-M 0.000 description 1
- 229910052925 anhydrite Inorganic materials 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910001423 beryllium ion Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 229920001429 chelating resin Polymers 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000010442 halite Substances 0.000 description 1
- 235000001055 magnesium Nutrition 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 238000000247 postprecipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 229910052979 sodium sulfide Inorganic materials 0.000 description 1
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 230000026676 system process Effects 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
- 239000002912 waste gas Substances 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
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/04—Chlorides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/14—Magnesium hydroxide
- C01F5/22—Magnesium hydroxide from magnesium compounds with alkali hydroxides or alkaline- earth oxides or hydroxides
-
- 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
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- 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
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/30—Nature of the water, waste water, sewage or sludge to be treated from the textile industry
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- Geology (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Materials Engineering (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The present invention relates to a kind of process technique producing and manufacturing the waste water that demineralized water produces in viscose rayon, belong to industrial waste water treatment.The process technique of the present invention passes through connection and the control of technique of equipment, reclaim magnesium hydroxide, reclaim calcium sulfate and reclaim sodium chloride, solve and prior art cannot process problem well that manufacture the waste water that demineralized water produces, a kind of process technique producing and manufacturing the waste water that demineralized water produces in viscose rayon is provided, it is simple that this technique relates to equipment, processing ease, low cost, reasonable in design, waste water can be processed easier, efficiently at low cost, reclaim sodium chloride, magnesium hydroxide and calcium sulfate in waste water.
Description
Technical field
The present invention relates to the process technique of a kind of waste water, produce in viscose rayon it is more particularly related to a kind of
Manufacture the process technique of the waste water that demineralized water produces, belong to industrial waste water treatment.
Background technology
Demineralized water (desalted water), refers to utilize various water treatment technology, removes float, colloid and inorganic
After the impurities in water such as cation, anion, obtained product water.Demineralized water is not meant in water that salt is entirely removed dry
Only, due to the consideration in the reason of technical elements and water producing cost, according to different purposes, it is allowed to it is miscellaneous that demineralized water contains trace
Matter.Desalination impurities in water is the fewest, and water purity is the highest.
In the technique producing demineralized water, reverse osmosis membrane equipment is a kind of conventional mode.But, reverse osmosis membrane equipment is raw
During producing industry demineralized water, can produce substantial amounts of hc effluent (predominantly salinity), it is former that its waste water generation amount accounts for demineralized water
Containing metal ions such as a large amount of calcium, magnesium, sodium in the 25% of water preparation amount, and this waste water, its electrical conductivity is higher than 1000us/cm.This gives up
The processing cost of water is high, if directly discharging or not handling discharge well, and can be to environment.
State Intellectual Property Office discloses Publication No. CN105439346A in 2016.03.30, entitled " a kind of
High slat-containing wastewater autoprecipitation preprocess method " invention, this inventive step is as follows: 1) add appropriate dispersion in high slat-containing wastewater
Agent, then enters film separation system for the first time by high-pressure pump and processes；2) the dense water of collection membrane piece-rate system, adds a small amount of demagging
Agent and composite flocculation agent make dense water take off the raw precipitation of stable yields；3) the dense water conservancy High-rate sedimentation technology of film separation system carries out solid-liquid and divides
From, supernatant returns Halite water and is again introduced into film separation system process together with water inlet, forms circulation, and precipitate is CaSO4、
Mg(OH)2It is main product, recycles as desulfurizing agent；4) film separation system product water salt is divided into monovalent ion, salinity to drop
Low, after membrance concentration, carry out evaporation process of classifying, fresh water reuse, monovalence NaCl, KCl are that main salt recycles.
State Intellectual Property Office discloses Publication No. CN102115280A in 2016.05.11, entitled " a kind of
The strengthening degree of depth concentration systems of high saliferous industrial wastewater and technique thereof " invention, this invention belongs to water treatment field, high containing salt worker
Industry waste water is adjusted pond and regulates-soften sedimentation tank precipitation-V-type filter--one section of reverse osmosis unit of ultrafiltration apparatus intensive filtration
Concentration-Di goes hardness-nanofiltration device to divide salt；Wherein: the dense water of nanofiltration device-frequently pole-reversing electroosmosis device
Concentrate, its product water-advanced oxidation device oxidation-always produce water tank, its dense water-freezing and crystallizing system crystallization-sulfate crystal；Nanofiltration
Device produces water-two-stage nitration reverse osmosis unit concentration-frequently pole-reversing electroosmosis device reconcentration, and its product water-advanced oxidation device oxidation-
Always producing water tank, its dense water-MVR evaporated crystallization device crystallization-sodium chloride crystallizes；Beneficial effect: effectively reduce high-voltage operation
The potential safety hazard brought；The problem that effectively after solution strong brine high enrichment, COD content is high, improves the purity of crystal salt, improves
The use value of crystal salt；This system automation degree is high, simple to operate, operating pressure is low, stable, crystal salt purity
The features such as height, operating cost are low.
State Intellectual Property Office discloses Publication No. CN105565569A in 2011.07.06, entitled " a kind of
Remove the processing method of heavy metals in chelating resin tower wastewater during brine refining " invention, this Invention Announce one removes desalination
The processing method of chelate resin tower heavy metal in waste water in crystal's system, mainly comprises the following steps: a. chelate resin tower waste water is delivered to storage
Flow container 1, is heated to 60～70 DEG C；B. waste water is from flowing into alkaline reaction groove, adds sodium hydrate aqueous solution regulation pH to 9～12
After, it is sequentially added into sodium sulfide solution, aqueous sodium carbonate, respectively stirring reaction 10～15 minutes；C. postprecipitation 2 has been reacted
～3 hours, supernatant send filter plant, mud to send primary refined brine sludge treating system；D. the supernatant effluent after filtering
Be delivered to fluid reservoir 2, add aqueous hydrochloric acid solution regulation pH to 6.0～7.5, backward fluid reservoir 2 be passed through compressed air, waste gas is arranged
Sky, water outlet as changing salt Water circulation or directly can be discharged.It is various heavy that the present invention can effectively remove in chelate resin tower waste water
Metal, effluent quality is fully achieved discharge water quality standard.
Above-mentioned prior art there is problems in that
1, during viscose rayon produces, the waste water producing demineralized water generation for reverse osmosis membrane there are currently no good processing mode；
2, existing processing mode cannot reclaim and recycle sodium chloride.Also magnesium hydroxide and calcium sulfate cannot be separately recovered；
3, complex treatment process of the prior art, cost is high.
Summary of the invention
Present invention seek to address that and prior art cannot process problem well that manufacture the waste water that demineralized water produces, it is provided that
A kind of production manufactures the process technique of waste water that demineralized water produces in viscose rayon, it is possible to easier, locate efficiently at low cost
Reason waste water, reclaims sodium chloride, magnesium hydroxide and the calcium sulfate in waste water.
In order to realize foregoing invention purpose, its concrete technical scheme is as follows:
A kind of process technique producing the waste water manufacturing demineralized water generation in viscose rayon, it is characterised in that: include following technique
Step:
A, recovery magnesium hydroxide
Waste water in the reverse osmosis membrane equipment manufacturing demineralized water enters magnesium hydrate precipitate pond (magnesium ion sedimentation tank), Xiang Qing
Adding sodium hydroxide in magnesium oxide precipitation pond, obtain magnesium oxide slurry, magnesium oxide slurry is through separating, rinse and again
Separate, dry, obtain magnesium hydroxide solid product；
B, recovery calcium sulfate
The mother solution containing calcium chloride and sodium chloride in magnesium hydrate precipitate pond enters calcium sulfate precipitation pond (calcium ion through filtering
Sedimentation tank), the metabisulfite solution in sodium sulfate dissolving tank enters calcium sulfate precipitation pond, agitated mixing, then passes through separation, rinses
And again separate, obtain calcium sulphate solid；
C, recovery sodium chloride
The mother solution containing sodium chloride in calcium sulfate precipitation pond enters sodium chloride collecting pit collection sodium chloride through filtering, and then enters
Enter sodium sulfate dissolving tank；The sodium chloride regenerated liquid collected in sodium chloride collecting pit enters ion exchanger to carry out reclaiming use.
Currently preferred, in step A and step B, described seperator is all disk centrifugal separator.
Currently preferred, in step, the flushing water obtained after described flushing contains sodium hydroxide and sodium chloride, institute
State after flushing water enters sodium chloride collecting pit collection sodium chloride and enter sodium sulfate dissolving tank.
Currently preferred, in stepb, the flushing water obtained after described flushing contains sodium chloride, and described flushing water enters
Enter after sodium chloride collecting pit collects sodium chloride and enter sodium sulfate dissolving tank.
Currently preferred, in stepb, the sodium sulfate in described sodium sulfate dissolving tank produces viscose rayon from being used for
Acid bath in sodium sulfate.
Currently preferred, in step, described magnesium oxide slurry is through separating, rinsing and again separate, then warp
Cross drying and dehydration, obtain magnesium hydroxide solid product.
Currently preferred, in stepb, described separation, flushing and again separate, then through boiling, the quickly cooling of heating up
And filtration, obtain calcium sulfate whiskers.
Currently preferred, the described sodium hydroxide adjustment pH value that adds in magnesium hydrate precipitate pond is 11；Described sulphuric acid
It is 8-11 that the mother solution containing sodium chloride in calcium deposit pond adjusts pH value.
Currently preferred, in step C, the sodium chloride regenerated liquid collected in described sodium chloride collecting pit adjusts concentration and is
4.5-10%, pH value enters ion exchanger after being adjusted to 7-9 carries out reclaiming use.
Currently preferred, in step A and step B, in described magnesium hydrate precipitate pond and described calcium sulfate precipitation pond
Reaction temperature control as 14-40 DEG C.
The Advantageous Effects that the present invention brings:
1, the problem manufacturing the waste water that demineralized water produces cannot be processed during the present invention solves prior art well, it is provided that a kind of
Producing the process technique manufacturing the waste water that demineralized water produces in viscose rayon, it is simple that this technique relates to equipment, processing ease, cost
Low, reasonable in design, it is possible to easier, process waste water efficiently at low cost, reclaim the sodium chloride in waste water, magnesium hydroxide and
Calcium sulfate.
2, the technique using the present invention, can reduce electrical conductivity average every day higher than 1000us/cm discharge of wastewater about 600m；
To the ion extraction reuse discarded in industrial wastewater, the industry such as high-quality calcium sulfate, magnesium hydroxide and sodium chloride can be efficiently generated
Raw material.
3, currently preferred, in step, the flushing water obtained after described flushing contains sodium hydroxide and sodium chloride,
Described flushing water enters after sodium chloride collecting pit collects sodium chloride and enters sodium sulfate dissolving tank.Currently preferred, in step B
In, the flushing water obtained after described flushing contains sodium chloride, and it is laggard that described flushing water enters sodium chloride collecting pit collection sodium chloride
Enter sodium sulfate dissolving tank.Flushing water containing sodium hydroxide and sodium chloride can be introduced sodium chloride collecting pit by above-mentioned setting, receives
Collecting more sodium chloride, sodium hydroxide can also recycle, cost-effective.Currently preferred, in stepb, described sulfur
Sodium sulfate in acid sodium dissolving tank is from the sodium sulfate in the acid bath for producing viscose rayon.Due in the acid bath that acid station produces
Sodium sulfate be acid, and flushing water makes sodium chloride solution pH value after entering sodium chloride collecting pit is higher, so can follow
Ring dissolves sodium sulfate, effectively reduces the input of sodium hydroxide in technique precipitation process.It addition, utilize acid station to produce the sulfur in acid bath
Acid sodium, is effectively reduced storage capacity and the processing cost of sodium sulfate.
4, currently preferred, in step, described magnesium oxide slurry through separation, flushing and separates again, then
Through drying and dehydration, obtain magnesium hydroxide solid product.Currently preferred, in stepb, described separation, flushing and
Again separate, then through boiling, quickly cooling and the filtration of heating up, obtain calcium sulfate whiskers.The addition of above-mentioned preferred steps, it is possible to
More efficiently, high-quality, stably reclaim magnesium hydroxide, calcium sulfate and sodium chloride.
5, currently preferred, the described sodium hydroxide adjustment pH value that adds in magnesium hydrate precipitate pond is 11；Described sulfur
It is 8-11 that the mother solution containing sodium chloride in acid calcium deposit pond adjusts pH value.Currently preferred, in step C, described chlorination
It is 4.5-10% that the sodium chloride regenerated liquid collected in sodium collecting pit adjusts concentration, and pH value enters ion exchanger after being adjusted to 7-9 and enters
Row reclaims and uses.Currently preferred, in step A and step B, described magnesium hydrate precipitate pond and described calcium sulfate precipitation pond
In reaction temperature control as 14-40 DEG C.Above-mentioned optimizing technology parameters, it is possible to more efficiently, high-quality, stably reclaim hydrogen-oxygen
Change magnesium, calcium sulfate and sodium chloride.
Accompanying drawing explanation
Fig. 1 is the device connection diagram that the present invention processes the system that technique uses.
Reference: 1 be reverse osmosis membrane equipment, 2 be magnesium hydrate precipitate pond, 3 be calcium sulfate precipitation pond, 4 for sodium chloride
Collecting pit, 5 be sodium sulfate dissolving tank, 6 be the first magnesium hydroxide seperator, 7 be magnesium hydroxide flusher, 8 be the second hydrogen-oxygen
Change magnesium seperator, 9 be magnesium hydroxide storing unit, 10 be the first calcium sulfate seperator, 11 be calcium sulfate flusher, 12 be the
Two calcium sulfate seperators, 13 be calcium sulfate storing unit, 14 be ion exchanger, 15 for concentration adjusting device.
Detailed description of the invention
Embodiment 1
A kind of process technique producing the waste water manufacturing demineralized water generation in viscose rayon, comprises the following steps that:
A, recovery magnesium hydroxide
Waste water in the reverse osmosis membrane equipment manufacturing demineralized water enters magnesium hydrate precipitate pond, in magnesium hydrate precipitate pond
Adding sodium hydroxide, obtain magnesium oxide slurry, magnesium oxide slurry, through separating, rinsing and again separate, obtains hydrogen-oxygen
Change magnesium solid product；
B, recovery calcium sulfate
The mother solution containing calcium chloride and sodium chloride in magnesium hydrate precipitate pond enters calcium sulfate precipitation pond, sodium sulfate through filtering
Metabisulfite solution in dissolving tank enters calcium sulfate precipitation pond, agitated mixing, then through separation, flushing and again separates,
Obtain calcium sulphate solid；
C, recovery sodium chloride
The mother solution containing sodium chloride in calcium sulfate precipitation pond enters sodium chloride collecting pit collection sodium chloride through filtering, and then enters
Enter sodium sulfate dissolving tank；The sodium chloride regenerated liquid collected in sodium chloride collecting pit enters ion exchanger to carry out reclaiming use.
Above-mentioned technique can use following processing system:
A kind of processing system producing the waste water manufacturing demineralized water generation in viscose rayon, sets including the reverse osmosis membrane being sequentially connected with
For 1, magnesium hydrate precipitate pond 2, calcium sulfate precipitation pond 3, sodium chloride collecting pit 4 and sodium sulfate dissolving tank 5；Described sodium sulfate dissolves
Pond 5 is connected with described calcium sulfate precipitation pond 3 again；Described magnesium hydrate precipitate pond 2 is also connected with the first magnesium hydroxide in turn and separates
Machine 6, magnesium hydroxide flusher the 7, second magnesium hydroxide seperator 8 and magnesium hydroxide storing unit 9；Described calcium sulfate precipitation pond
3 are also connected with the first calcium sulfate seperator 10, calcium sulfate flusher the 11, second calcium sulfate seperator 12 and calcium sulfate in turn deposits
Put device 13；Described sodium chloride collecting pit 4 is also associated with ion exchanger 14.
Described first magnesium hydroxide seperator the 6, second magnesium hydroxide seperator the 8, first calcium sulfate seperator 10 and second
Calcium sulfate seperator 12 is all butterfly centrifugal machine.
Described magnesium hydroxide flusher 7 and described calcium sulfate flusher 11 merge into one each via independent pipeline
Bar pipeline is connected with described sodium chloride collecting pit 4.
Sodium sulfate in described sodium sulfate dissolving tank 5 is from the sodium sulfate in the acid bath for producing viscose rayon.
It is additionally provided with defecator between described magnesium hydrate precipitate pond 2 and described calcium sulfate precipitation pond 3.
It is additionally provided with defecator between described calcium sulfate precipitation pond 3 and described sodium chloride collecting pit 4.
It is additionally provided with drying unit between described second magnesium hydroxide seperator 8 and described magnesium hydroxide storing unit 9.
Intensification boiling also it is disposed with between described second calcium sulfate seperator 12 and described calcium sulfate storing unit 13
Device, quick cooler and defecator.
It is additionally provided with concentration adjusting device 15 between described sodium chloride collecting pit 4 and described ion exchanger 14.
Embodiment 2
A kind of process technique producing the waste water manufacturing demineralized water generation in viscose rayon, comprises the following steps that:
A, recovery magnesium hydroxide
Waste water in the reverse osmosis membrane equipment manufacturing demineralized water enters magnesium hydrate precipitate pond, in magnesium hydrate precipitate pond
Adding sodium hydroxide, obtain magnesium oxide slurry, magnesium oxide slurry, through separating, rinsing and again separate, obtains hydrogen-oxygen
Change magnesium solid product；
B, recovery calcium sulfate
The mother solution containing calcium chloride and sodium chloride in magnesium hydrate precipitate pond enters calcium sulfate precipitation pond, sodium sulfate through filtering
Metabisulfite solution in dissolving tank enters calcium sulfate precipitation pond, agitated mixing, then through separation, flushing and again separates,
Obtain calcium sulphate solid；
C, recovery sodium chloride
The mother solution containing sodium chloride in calcium sulfate precipitation pond enters sodium chloride collecting pit collection sodium chloride through filtering, and then enters
Enter sodium sulfate dissolving tank；The sodium chloride regenerated liquid collected in sodium chloride collecting pit enters ion exchanger to carry out reclaiming use.
Preferably, in step A and step B, described seperator is all disk centrifugal separator.
Preferably, in step, the flushing water obtained after described flushing contains sodium hydroxide and sodium chloride, described flushing
Water enters after sodium chloride collecting pit collects sodium chloride and enters sodium sulfate dissolving tank.
Preferably or further, in stepb, the flushing water obtained after described flushing contains sodium chloride, described
Flushing water enters after sodium chloride collecting pit collects sodium chloride and enters sodium sulfate dissolving tank.
Further, in stepb, the sodium sulfate in described sodium sulfate dissolving tank is from for producing viscose rayon
Sodium sulfate in acid bath.
Preferably, in step, described magnesium oxide slurry is through separating, rinsing and again separate, then passes through drying
And dehydration, obtain magnesium hydroxide solid product.
Preferably or further, in stepb, described separation, flushing and again separate, then through the boiling that heats up
Rise, quickly cooling and filtration, obtain calcium sulfate whiskers.
Embodiment 3
A kind of process technique producing the waste water manufacturing demineralized water generation in viscose rayon, comprises the following steps that:
A, recovery magnesium hydroxide
Waste water in the reverse osmosis membrane equipment manufacturing demineralized water enters magnesium hydrate precipitate pond, in magnesium hydrate precipitate pond
Adding sodium hydroxide, obtain magnesium oxide slurry, magnesium oxide slurry, through separating, rinsing and again separate, obtains hydrogen-oxygen
Change magnesium solid product；
B, recovery calcium sulfate
The mother solution containing calcium chloride and sodium chloride in magnesium hydrate precipitate pond enters calcium sulfate precipitation pond, sodium sulfate through filtering
Metabisulfite solution in dissolving tank enters calcium sulfate precipitation pond, agitated mixing, then through separation, flushing and again separates,
Obtain calcium sulphate solid；
C, recovery sodium chloride
The mother solution containing sodium chloride in calcium sulfate precipitation pond enters sodium chloride collecting pit collection sodium chloride through filtering, and then enters
Enter sodium sulfate dissolving tank；The sodium chloride regenerated liquid collected in sodium chloride collecting pit enters ion exchanger to carry out reclaiming use.
Preferably, the described sodium hydroxide adjustment pH value that adds in magnesium hydrate precipitate pond is 11；Described calcium sulfate precipitation
It is 8 that the mother solution containing sodium chloride in pond adjusts pH value.
Preferably, in step C, it is 4.5% that the sodium chloride regenerated liquid collected in described sodium chloride collecting pit adjusts concentration,
PH value enters ion exchanger after being adjusted to 7 carries out reclaiming use.
Reaction preferably, in step A and step B, in described magnesium hydrate precipitate pond and described calcium sulfate precipitation pond
It is 14 DEG C that temperature controls.
Embodiment 4
A kind of process technique producing the waste water manufacturing demineralized water generation in viscose rayon, comprises the following steps that:
A, recovery magnesium hydroxide
Waste water in the reverse osmosis membrane equipment manufacturing demineralized water enters magnesium hydrate precipitate pond, in magnesium hydrate precipitate pond
Adding sodium hydroxide, obtain magnesium oxide slurry, magnesium oxide slurry, through separating, rinsing and again separate, obtains hydrogen-oxygen
Change magnesium solid product；
B, recovery calcium sulfate
The mother solution containing calcium chloride and sodium chloride in magnesium hydrate precipitate pond enters calcium sulfate precipitation pond, sodium sulfate through filtering
Metabisulfite solution in dissolving tank enters calcium sulfate precipitation pond, agitated mixing, then through separation, flushing and again separates,
Obtain calcium sulphate solid；
C, recovery sodium chloride
The mother solution containing sodium chloride in calcium sulfate precipitation pond enters sodium chloride collecting pit collection sodium chloride through filtering, and then enters
Enter sodium sulfate dissolving tank；The sodium chloride regenerated liquid collected in sodium chloride collecting pit enters ion exchanger to carry out reclaiming use.
Preferably, the described sodium hydroxide adjustment pH value that adds in magnesium hydrate precipitate pond is 11；Described calcium sulfate precipitation
It is 11 that the mother solution containing sodium chloride in pond adjusts pH value.
Preferably, in step C, it is 10% that the sodium chloride regenerated liquid collected in described sodium chloride collecting pit adjusts concentration, pH
Value enters ion exchanger and carries out reclaiming use after being adjusted to 9.
Reaction preferably, in step A and step B, in described magnesium hydrate precipitate pond and described calcium sulfate precipitation pond
It is 40 DEG C that temperature controls.
Embodiment 5
A kind of process technique producing the waste water manufacturing demineralized water generation in viscose rayon, comprises the following steps that:
A, recovery magnesium hydroxide
Waste water in the reverse osmosis membrane equipment manufacturing demineralized water enters magnesium hydrate precipitate pond, in magnesium hydrate precipitate pond
Adding sodium hydroxide, obtain magnesium oxide slurry, magnesium oxide slurry, through separating, rinsing and again separate, obtains hydrogen-oxygen
Change magnesium solid product；
B, recovery calcium sulfate
The mother solution containing calcium chloride and sodium chloride in magnesium hydrate precipitate pond enters calcium sulfate precipitation pond, sodium sulfate through filtering
Metabisulfite solution in dissolving tank enters calcium sulfate precipitation pond, agitated mixing, then through separation, flushing and again separates,
Obtain calcium sulphate solid；
C, recovery sodium chloride
The mother solution containing sodium chloride in calcium sulfate precipitation pond enters sodium chloride collecting pit collection sodium chloride through filtering, and then enters
Enter sodium sulfate dissolving tank；The sodium chloride regenerated liquid collected in sodium chloride collecting pit enters ion exchanger to carry out reclaiming use.
Preferably, the described sodium hydroxide adjustment pH value that adds in magnesium hydrate precipitate pond is 11；Described calcium sulfate precipitation
It is 9.5 that the mother solution containing sodium chloride in pond adjusts pH value.
Preferably, in step C, it is 7% that the sodium chloride regenerated liquid collected in described sodium chloride collecting pit adjusts concentration, pH
Value enters ion exchanger and carries out reclaiming use after being adjusted to 8.
Reaction preferably, in step A and step B, in described magnesium hydrate precipitate pond and described calcium sulfate precipitation pond
It is 27 DEG C that temperature controls.
Embodiment 6
A kind of process technique producing the waste water manufacturing demineralized water generation in viscose rayon, comprises the following steps that:
A, recovery magnesium hydroxide
Waste water in the reverse osmosis membrane equipment manufacturing demineralized water enters magnesium hydrate precipitate pond, in magnesium hydrate precipitate pond
Adding sodium hydroxide, obtain magnesium oxide slurry, magnesium oxide slurry, through separating, rinsing and again separate, obtains hydrogen-oxygen
Change magnesium solid product；
B, recovery calcium sulfate
The mother solution containing calcium chloride and sodium chloride in magnesium hydrate precipitate pond enters calcium sulfate precipitation pond, sodium sulfate through filtering
Metabisulfite solution in dissolving tank enters calcium sulfate precipitation pond, agitated mixing, then through separation, flushing and again separates,
Obtain calcium sulphate solid；
C, recovery sodium chloride
The mother solution containing sodium chloride in calcium sulfate precipitation pond enters sodium chloride collecting pit collection sodium chloride through filtering, and then enters
Enter sodium sulfate dissolving tank；The sodium chloride regenerated liquid collected in sodium chloride collecting pit enters ion exchanger to carry out reclaiming use.
Preferably, the described sodium hydroxide adjustment pH value that adds in magnesium hydrate precipitate pond is 11；Described calcium sulfate precipitation
It is 10 that the mother solution containing sodium chloride in pond adjusts pH value.
Preferably, in step C, it is 9% that the sodium chloride regenerated liquid collected in described sodium chloride collecting pit adjusts concentration, pH
Value enters ion exchanger and carries out reclaiming use after being adjusted to 7.5.
Reaction preferably, in step A and step B, in described magnesium hydrate precipitate pond and described calcium sulfate precipitation pond
It is 21 DEG C that temperature controls.
Claims (10)
1. one kind produces the process technique manufacturing the waste water that demineralized water produces in viscose rayon, it is characterised in that: include following work
Skill step:
A, recovery magnesium hydroxide
Waste water in the reverse osmosis membrane equipment manufacturing demineralized water enters magnesium hydrate precipitate pond, in magnesium hydrate precipitate pond
Adding sodium hydroxide, obtain magnesium oxide slurry, magnesium oxide slurry, through separating, rinsing and again separate, obtains hydrogen-oxygen
Change magnesium solid product；
B, recovery calcium sulfate
The mother solution containing calcium chloride and sodium chloride in magnesium hydrate precipitate pond enters calcium sulfate precipitation pond, sodium sulfate through filtering
Metabisulfite solution in dissolving tank enters calcium sulfate precipitation pond, agitated mixing, then through separation, flushing and again separates,
Obtain calcium sulphate solid；
C, recovery sodium chloride
The mother solution containing sodium chloride in calcium sulfate precipitation pond enters sodium chloride collecting pit collection sodium chloride through filtering, and then enters
Enter sodium sulfate dissolving tank；The sodium chloride regenerated liquid collected in sodium chloride collecting pit enters ion exchanger to carry out reclaiming use.
A kind of process technique producing the waste water manufacturing demineralized water generation in viscose rayon the most according to claim 1, its
Being characterised by: in step A and step B, described seperator is all disk centrifugal separator.
A kind of process technique producing the waste water manufacturing demineralized water generation in viscose rayon the most according to claim 1, its
Being characterised by: in step, the flushing water obtained after described flushing contains sodium hydroxide and sodium chloride, and described flushing water enters
Sodium chloride collecting pit enters sodium sulfate dissolving tank after collecting sodium chloride.
4. according to a kind of process technique producing the waste water manufacturing demineralized water generation in viscose rayon described in claim 1 or 3,
It is characterized in that: in stepb, the flushing water obtained after described flushing contains sodium chloride, and described flushing water enters sodium chloride and receives
Ji Chi enters sodium sulfate dissolving tank after collecting sodium chloride.
A kind of process technique producing the waste water manufacturing demineralized water generation in viscose rayon the most according to claim 4, its
Being characterised by: in stepb, the sodium sulfate in described sodium sulfate dissolving tank is from the sulfur in the acid bath for producing viscose rayon
Acid sodium.
A kind of process technique producing the waste water manufacturing demineralized water generation in viscose rayon the most according to claim 1, its
Being characterised by: in step, described magnesium oxide slurry through separation, flushing and separates again, then through drying and de-
Water, obtains magnesium hydroxide solid product.
7. according to a kind of process technique producing the waste water manufacturing demineralized water generation in viscose rayon described in claim 1 or 6,
It is characterized in that: in stepb, described separation, flushing and again separate, then through boiling, quickly cooling and the filtration of heating up, obtain
Calcium sulfate whiskers.
A kind of process technique producing the waste water manufacturing demineralized water generation in viscose rayon the most according to claim 1, its
It is characterised by: the described sodium hydroxide adjustment pH value that adds in magnesium hydrate precipitate pond is 11；In described calcium sulfate precipitation pond
It is 8-11 that mother solution containing sodium chloride adjusts pH value.
A kind of process technique producing the waste water manufacturing demineralized water generation in viscose rayon the most according to claim 1, its
Being characterised by: in step C, it is 4.5-10% that the sodium chloride regenerated liquid collected in described sodium chloride collecting pit adjusts concentration, pH value
Enter ion exchanger after being adjusted to 7-9 to carry out reclaiming use.
A kind of process technique producing the waste water manufacturing demineralized water generation in viscose rayon the most according to claim 1, its
It is characterised by: in step A and step B, the reaction temperature control in described magnesium hydrate precipitate pond and described calcium sulfate precipitation pond
It is made as 14-40 DEG C.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108946784A (en) * | 2018-08-24 | 2018-12-07 | 山西兆益生物有限公司 | A kind of mequindox mother liquor treatment process |
| CN109574174A (en) * | 2018-12-13 | 2019-04-05 | 中南大学 | A kind of method that rare-earth smelting technical process chlorine-contained wastewater is administered |
| CN109574175A (en) * | 2018-12-13 | 2019-04-05 | 中南大学 | A kind of administering method of chloride solution |
| CN109647152A (en) * | 2019-01-29 | 2019-04-19 | 中南大学 | A kind of purification method and its purification device containing chlorine or/and sulphur-containing exhaust gas |
| CN113788486A (en) * | 2021-09-29 | 2021-12-14 | 安徽大学绿色产业创新研究院 | Method for preparing curd-shaped magnesium hydroxide with high sodium-magnesium ratio sodium sulfate industrial wastewater |
| EP4660138A1 (en) * | 2024-06-06 | 2025-12-10 | Solvay SA | Recycling of the nacl solution from the "gypsum workshop" to dissolve the na2so4 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108946784A (en) * | 2018-08-24 | 2018-12-07 | 山西兆益生物有限公司 | A kind of mequindox mother liquor treatment process |
| CN109574174A (en) * | 2018-12-13 | 2019-04-05 | 中南大学 | A kind of method that rare-earth smelting technical process chlorine-contained wastewater is administered |
| CN109574175A (en) * | 2018-12-13 | 2019-04-05 | 中南大学 | A kind of administering method of chloride solution |
| CN109647152A (en) * | 2019-01-29 | 2019-04-19 | 中南大学 | A kind of purification method and its purification device containing chlorine or/and sulphur-containing exhaust gas |
| CN109647152B (en) * | 2019-01-29 | 2022-03-29 | 中南大学 | Method and device for purifying waste gas containing chlorine or/and sulfur |
| CN113788486A (en) * | 2021-09-29 | 2021-12-14 | 安徽大学绿色产业创新研究院 | Method for preparing curd-shaped magnesium hydroxide with high sodium-magnesium ratio sodium sulfate industrial wastewater |
| EP4660138A1 (en) * | 2024-06-06 | 2025-12-10 | Solvay SA | Recycling of the nacl solution from the "gypsum workshop" to dissolve the na2so4 |
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Application publication date: 20161207 |