CN103073121A - Method for simultaneously treating industrial pickling waste water, washing waste water and chemical organic waste water - Google Patents
Method for simultaneously treating industrial pickling waste water, washing waste water and chemical organic waste water Download PDFInfo
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- CN103073121A CN103073121A CN2012104919919A CN201210491991A CN103073121A CN 103073121 A CN103073121 A CN 103073121A CN 2012104919919 A CN2012104919919 A CN 2012104919919A CN 201210491991 A CN201210491991 A CN 201210491991A CN 103073121 A CN103073121 A CN 103073121A
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- washes
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- 239000002351 wastewater Substances 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000000126 substance Substances 0.000 title claims abstract description 31
- 238000005554 pickling Methods 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 238000005406 washing Methods 0.000 title abstract description 6
- 239000010815 organic waste Substances 0.000 title abstract 4
- 150000002500 ions Chemical class 0.000 claims abstract description 37
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 28
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 21
- 239000002184 metal Substances 0.000 claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- 150000003839 salts Chemical class 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 73
- 239000002253 acid Substances 0.000 claims description 24
- 239000010786 composite waste Substances 0.000 claims description 17
- 229910052742 iron Inorganic materials 0.000 claims description 16
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 10
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 3
- 230000008030 elimination Effects 0.000 claims description 2
- 238000003379 elimination reaction Methods 0.000 claims description 2
- 238000000247 postprecipitation Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 17
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 abstract description 9
- 229960001545 hydrotalcite Drugs 0.000 abstract description 9
- 229910001701 hydrotalcite Inorganic materials 0.000 abstract description 9
- 238000003756 stirring Methods 0.000 abstract description 6
- 239000002699 waste material Substances 0.000 abstract description 6
- 229910021645 metal ion Inorganic materials 0.000 abstract description 4
- 150000001450 anions Chemical class 0.000 abstract description 3
- 239000002957 persistent organic pollutant Substances 0.000 abstract description 3
- 239000010812 mixed waste Substances 0.000 abstract 1
- 230000001376 precipitating effect Effects 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 10
- 238000001556 precipitation Methods 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 238000004140 cleaning Methods 0.000 description 8
- 150000001875 compounds Chemical class 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000002425 crystallisation Methods 0.000 description 5
- 230000008025 crystallization Effects 0.000 description 5
- 239000011229 interlayer Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000003513 alkali Substances 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 239000013543 active substance Substances 0.000 description 3
- 238000001311 chemical methods and process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000011790 ferrous sulphate Substances 0.000 description 3
- 235000003891 ferrous sulphate Nutrition 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- -1 pharmacy Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 231100001261 hazardous Toxicity 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 2
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 230000007096 poisonous effect Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 235000019832 sodium triphosphate Nutrition 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 101710194948 Protein phosphatase PhpP Proteins 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 150000001449 anionic compounds Chemical class 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 238000001574 biopsy Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000000502 dialysis Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000002848 electrochemical method Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003933 environmental pollution control Methods 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000002070 germicidal effect Effects 0.000 description 1
- 150000002366 halogen compounds Chemical class 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 229910001412 inorganic anion Inorganic materials 0.000 description 1
- 238000009830 intercalation Methods 0.000 description 1
- 230000002687 intercalation Effects 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 150000002828 nitro derivatives Chemical class 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 150000002891 organic anions Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- HWGNBUXHKFFFIH-UHFFFAOYSA-I pentasodium;[oxido(phosphonatooxy)phosphoryl] phosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O HWGNBUXHKFFFIH-UHFFFAOYSA-I 0.000 description 1
- 150000003016 phosphoric acids Chemical class 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 235000021110 pickles Nutrition 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Abstract
The invention discloses a method for simultaneously treating industrial pickling waste water, washing waste water and chemical organic waste water, which comprises the following steps: analyzing ionic concentration of Fe<2+> and Fe<3+> in the pickling rust removal waste water, adding other trivalent metal salts and divalent metal salt to adjust so that the mole concentration of divalent ions is 2-4 times of the mole concentration of the trivalent ions; mixing the pickling rust removal waste water and the washing waste water according to volume ratio of 3:1-6:1, adding 50%-70% of NaOH solution in the mixed waste water until the pH value reaches 8-10, stirring for 60-120 minutes under 300-400rmp while adding drop by drop; adding the chemical organic waste water with 1-2 times of washing waste water, fully stirring and mixing for 2-4 hours, and precipitating and separating; preparing the metal ions in the pickling rust removal waste water and anions in the washing waste water to organic hydrotalcite, and directly using the organic hydrotalcite to absorb the organic pollutant in the chemical organic waste water for treatment of wastes with processes of wastes against one another.
Description
Technical field
The present invention relates to the exploitation of environmental pollution control new technology, relate in particular to a kind of method of processing simultaneously industrial acid-washed waste water, washes and chemical industrial organic wastewater.
Background technology
Because the steel rolling member is exposed in the air and is oxidized by oxygen easily, is commonly called as and gets rusty.When carrying out the surface working processing of steel rolling member, need to remove component surface rustization layer.The steel rolling component surface is carried out processing treatment, can strengthen its tolerance, prolong its work-ing life.The removing of steel rolling component surface rustization layer mainly contains physical method, chemical process and electrochemical method etc.Physical mainly relies on mechanical force to peel off rusty scale, and the method shortcoming mainly is that the rusty scale removal is not thorough, and the rust cleaning process produces a large amount of dust, answers land used fewer in the steel derusting field at present; It is the widest that chemical process is used, mainly be to rely on acid and rusty scale reaction to reach the purpose of rust cleaning, the chemical method rust cleaning has the advantages such as quality that speed is fast, rust cleaning is thorough, the follow-up steel surface of assurance is processed, but, chemical process is processed still unsatisfactory part, such as pollution surrounding environment such as spent pickle liquors.Along with expanding economy, Iron And Steel Industry and iron and steel production be constantly development also, and the problem that steel chemical pickling rust cleaning process produces becomes increasingly conspicuous, and becomes one of research emphasis in the waste water treatment.
Steel surface is owing to the rusty scale moiety that corrosion produces mainly contains: Fe
2O
3, FeO, Fe
3O
4, hydration iron rust compound etc.Rusty scale is loose, porous state, easily infiltration, surface area ratio is larger.Acid cleaning process mainly is that acid is carried out chemical reaction with iron rust, makes rusty scale break away from the iron-based body, and the reaction of sour dissolved iron matrix occurs simultaneously in the acid pickling and rust removing process.The reaction that the rust cleaning process occurs is mainly as follows:
6H
+＋Fe
2O
3＝2Fe
3+＋3H
2O，
2H
+＋FeO＝Fe
2+＋H
2O，
8H
+＋Fe
3O
4＝2Fe
3+＋Fe
2+＋4H
2O，
2Fe
3+＋Fe＝3Fe
2+，
2H
+＋Fe＝Fe
2+＋H
2。
The a large amount of Fe of oil-containing in the waste water that acid cleaning process produces
2+And Fe
3+Therefore ion, can be used as resource and uses.Absorption method mainly contains vacuum concentration freeze crystallization (reduction vaporization freeze crystallization), acid adding freeze crystallization (without the evaporative freezing crystallization process), spontaneous nucleation diffusive dialysis method, polymeric ferrous sulphate process, adds iron filings production ferrous sulfate Lung biopsy at present, front four kinds of methods exist mostly that facility investment is large, complex process, the demanding shortcoming of operative technique, the applicable larger enterprise of spent acid amount that processes.Add iron filings and produce the ferrous sulfate method for the waste water that contains multiple other metal ions because the Crystallization Separation weak effect can affect product purity.
Along with rapid development of economy, the Chemicals production process is to the pollution aggravation of environment, harm to human health is also more prevalent and serious, the organic substance of wherein particularly discharging in fine chemical product (such as pharmacy, dyestuff, the daily use chemicals etc.) production process all is the material of complex structure, poisonous and harmful and biological hard degradation mostly.Therefore, the difficulty of chemical wastewater treatment is larger.The essential characteristic of wastewater from chemical industry is high COD, high salinity, toxic to microorganism, is typical used water difficult to degradate, is research emphasis and the focus of present water technology aspect.The signature analysis of wastewater from chemical industry is as follows: (1) water-quality constituents is complicated, and by product is many, and reaction raw materials is the compound of solvent based material or ring texture often, has increased the intractability of waste water; (2) Pollutants in Wastewater content is high, this be since raw material reaction not exclusively and raw material or produce in a large amount of solvent mediums of use to have entered the waste water system caused; (3) hazardous and noxious substances is many, and it is poisonous and hazardous to microorganism that many organic pollutants are arranged in the Fine Chemistry Wastewater, such as halogen compounds, nitro-compound, the dispersion agent with germicidal action or tensio-active agent etc.; (4) the bio-refractory material is many, and B/C is than low, and biodegradability is poor; (5) chroma in waste water is high.Wastewater from chemical industry is a kind of more unmanageable waste water.
Contain tensio-active agent (mainly being that anion surfactant is such as long alkyl chain length sulfonate) in the washes, tripoly phosphate sodium STPP, the auxiliary agents such as carboxymethyl cellulose, greasy dirt, dust particle and various microorganisms etc., outward appearance is muddy, COD is 300～800mg/l, pH is 6.5～7.5, and suspension content is higher, generally at 500～1200mg/l.Phosphoric acid salt enters the eutrophication that water body can cause water body.After tensio-active agent enters water body, aquatic animal,plants is poisoned cause death, make some Micropollutants solubilising in the water, thereby increase the difficulty that water supply plant is processed; When entering washing composition in municipal sewage plant's sewage and reaching finite concentration, can affect many processes such as aeration, precipitation, sludge digestion.
The processing of this class waste water mainly is separate treatment at present, selects method separately to process respectively for the characteristic of various waste water; Perhaps various wastewater mixes, and some technique of general usefulness superposes, and gives no thought to the separately characteristics of waste water, take time and effort, invest large, process cost is high.
Layered di-hydroxyl composite metal oxidate (Layered Double Hydroxides is called for short LDH) claims again hydrotalcite, is the important inorganic functional material of a class.The adjustable sex change of the laminate structure that it is unique and laminate element and interlayer anion gets more and more people's extensive concerning, introduce new object negatively charged ion through ion-exchange to interlayer and can make laminate structure and composition produce corresponding the variation, thereby can prepare the functional materials that a large class has special property.Hydrotalcite material belongs to anion type laminated compound.The compounds that lamellar compound refers to have laminate structure, interlayer ion has interchangeability, utilize intercalation that the lamellar compound main body has and the interchangeability of interlayer ion under strong polar molecule effect, form layer-pillared compound thereby some functional guest species are introduced bedding voids and the laminate distance strutted.
The hydrotalcite chemical structure of general formula is: [M
2+ 1-xM
3+X (OH)
2]
X+[(A
N-)
X/nMH
2O], M wherein
2+Be Mg
2+, Ni
2+, Mn
2+, Zn
2+, Ca
2+, Fe
2+, Cu
2+Deng the divalent metal negatively charged ion; M
3+Be Al
3+, Cr
3+, Fe
3+, Co
3+Deng the trivalent metal negatively charged ion; A
N-Be negatively charged ion, such as CO
3 2-, NO
3 -, Cl
-, OH
-, SO
4 2-, PO
4 3-, C
6H
4(COO)
2 2-Etc. inorganic and organic ion and complexing ion, different when the interlayer inorganic anion, the interlamellar spacing of hydrotalcite is different, and after the hydrotalcite absorb polluted matter, interlamellar spacing also can increase, to hold more pollutent simultaneously.
Summary of the invention
The objective of the invention is that all kinds of waste water need individual curing in the prior art in order to overcome, can not mutually utilize and the deficiency of the treatment of wastes with processes of wastes against one another, a kind of method of processing simultaneously industrial acid-washed waste water, washes and chemical industrial organic wastewater is provided.
The technical solution used in the present invention is in turn include the following steps:
1) collects acid pickling and rust removing waste water and also cross elimination solid particulate wherein, analyze Fe wherein
2+And Fe
3+The concentration of ion, and regulate by adding other trivalent metal salts and divalent metal salt is so that bivalent ions volumetric molar concentration is 2 ~ 4 times of volumetric molar concentration of trivalent ion;
2) with acid pickling and rust removing waste water and by volume 3:1 ~ 6:1 mixing of washes, in composite waste, drip 50% ~ 70% NaOH solution, until till pH value to 8 ~ 10, under 300 ~ 400 rpm, stirred 60～120 minutes during dropping;
3) adding the water yield is the chemical industrial organic wastewater of 1 ~ 2 times of washes, fully mixes 2 ~ 4 h postprecipitations, separation;
4) add hydrochloric acid or sulfuric acid, regulate pH to 7.
Advantage of the present invention is to utilize the preparation principle of organic hydrotalcite, metal ion in the acid pickling and rust removing waste water and the negatively charged ion in the washes are prepared into organic hydrotalcite, and be directly used in the organic pollutant that adsorbs in the chemical industrial organic wastewater, by precipitation pollutent is separated from water at last.The present invention has utilized metal ion and organic anion in the waste water according to the characteristic of waste water, and the treatment of wastes with processes of wastes against one another is simple, inexpensive easy popularization.
Embodiment
With the acid pickling and rust removing wastewater collection, survey its pH value, if pH is excessively low, some scrap iron of input that can be as much as possible wherein acid consume, and increase on the one hand Fe
2+And Fe
3+The concentration of ion can reduce the add-on of follow-up alkali on the other hand.Filter and remove acid pickling and rust removing wastewater solids particle, analyze wherein Fe
2+And Fe
3+The concentration of ion, and regulate trivalent metal salt such as comparatively cheap Al by adding other trivalent metal salts and divalent metal salt
3+, Fe
3+Deng, divalent metal salt such as comparatively cheap Mg
2+, Fe
2+Deng, guarantee that bivalent ions volumetric molar concentration is 2 ~ 4 times of volumetric molar concentration of trivalent ion.Be that 3:1 ~ 6:1 mixes by volume with acid pickling and rust removing waste water and washes, drip fast 50% ~ 70% NaOH solution in the composite waste and regulate the pH value, until pH value to 8 ~ 10, during dropping under 300 ~ 400 rpm rapid stirring 60～120 minutes.Add chemical industrial organic wastewater, the water yield is 1 ~ 2 times of washes, after wastewater from chemical industry adds, composite waste before fully mixes 2 ~ 4 h[B1] precipitation, separate, the pollutent in the composite waste can be removed along with precipitation, add at last hydrochloric acid or sulfuric acid, regulate about pH to 7.
3 embodiment of the present invention below further are provided:
Embodiment 1
With the acid pickling and rust removing wastewater collection, survey its pH value, pH is 3.2, some scrap iron of input as much as possible and rust iron, wherein acid consumes, and increases on the one hand Fe
2+And Fe
3+The concentration of ion can reduce the add-on of follow-up alkali on the other hand; Filter and remove the pickling waste waters solid particulate, analyze wherein Fe
2+And Fe
3+The concentration of ion, and by adding other trivalent metal salts AlCl
3, guarantee that divalent ion concentration is 4 times of trivalent ion concentration; Acid pickling and rust removing waste water and washes are pressed the 6:1(volume ratio) mix, drip fast 70% NaOH solution in the composite waste and regulate pH value to 10, during dropping under 400 rpm rapid stirring 120 minutes, the adding chemical industrial organic wastewater, the water yield is 2 times for washes, after wastewater from chemical industry adds, and composite waste before fully mixes 4 h, precipitation, separate, pollutent in the composite waste can be removed along with precipitation, adds at last hydrochloric acid, regulates about pH to 7.Measure the water quality of processed waste water, by analysis Fe in the composite waste
2+And Fe
3+The concentration of ion and COD, clearance are respectively 95.8%, 97.2% and 95.3%.
Embodiment 2
Pickling waste waters is collected, surveyed its pH value, pH is 3.8, some scrap iron of input as much as possible and rust iron, and wherein acid consumes, and increases on the one hand Fe
2+And Fe
3+The concentration of ion can reduce the add-on of follow-up alkali on the other hand; Filter and remove the pickling waste waters solid particulate, analyze wherein Fe
2+And Fe
3+The concentration of ion, and by adding divalent metal salt MgCl
2Regulate, guarantee that divalent ion concentration is 4 times of trivalent ion concentration; Acid pickling and rust removing waste water and washes are pressed the 3:1(volume ratio) mix, drip fast 50% NaOH solution in the composite waste and regulate pH value to 8, during dropping under 300 rpm rapid stirring 60 minutes, the adding chemical industrial organic wastewater, the water yield is 1 times for washes, after wastewater from chemical industry adds, and composite waste before fully mixes 2 h, precipitation, separate, pollutent in the composite waste can be removed along with precipitation, adds at last sulfuric acid, regulates about pH to 7.Measure the water quality of processed waste water, by analysis Fe in the composite waste
2+And Fe
3+The concentration of ion and COD, clearance are respectively 94.5%, 95.1% and 97.2%.
Embodiment 3
Pickling waste waters is collected, surveyed its pH value, pH is 2.8, some scrap iron of input as much as possible and rust iron, and wherein acid consumes, and increases on the one hand Fe
2+And Fe
3+The concentration of ion can reduce the add-on of follow-up alkali on the other hand; Filter and remove the pickling waste waters solid particulate, analyze wherein Fe
2+And Fe
3+The concentration of ion, and by adding divalent metal salt FeCl
2Regulate, guarantee that divalent ion concentration is 2 times of trivalent ion concentration; Acid pickling and rust removing waste water and washes are pressed the 5:1(volume ratio) mix, drip fast 60% NaOH solution in the composite waste and regulate pH value to 9, during dropping under 350 rpm rapid stirring 90 minutes, the adding chemical industrial organic wastewater, the water yield is 1.5 times for washes, after wastewater from chemical industry adds, and composite waste before fully mixes 3 h, precipitation, separate, pollutent in the composite waste can be removed along with precipitation, adds at last hydrochloric acid, regulates about pH to 7.Measure the water quality of processed waste water, by analysis Fe in the composite waste
2+And Fe
3+The concentration of ion and COD, clearance are respectively 94.2%, 95.1% and 96.5%.
Claims (2)
1. method of processing simultaneously industrial acid-washed waste water, washes and chemical industrial organic wastewater is characterized in that may further comprise the steps:
1) collects acid pickling and rust removing waste water and also cross elimination solid particulate wherein, analyze Fe wherein
2+And Fe
3+The concentration of ion, and regulate by adding other trivalent metal salts and divalent metal salt is so that bivalent ions volumetric molar concentration is 2 ~ 4 times of volumetric molar concentration of trivalent ion;
2) with acid pickling and rust removing waste water and by volume 3:1 ~ 6:1 mixing of washes, in composite waste, drip 50% ~ 70% NaOH solution, until till pH value to 8 ~ 10, under 300 ~ 400 rpm, stirred 60～120 minutes during dropping;
3) adding the water yield is the chemical industrial organic wastewater of 1 ~ 2 times of washes, fully mixes 2 ~ 4 h postprecipitations, separation;
4) add hydrochloric acid or sulfuric acid, regulate pH to 7.
2. the method for processing simultaneously industrial acid-washed waste water, washes and chemical industrial organic wastewater according to claim 1 is characterized in that: in the step 1), measure the pH value of collected acid pickling and rust removing waste water, if pH is excessively low, and input scrap iron as much as possible.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210491991.9A CN103073121B (en) | 2012-11-28 | 2012-11-28 | Method for simultaneously treating industrial pickling waste water, washing waste water and chemical organic waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210491991.9A CN103073121B (en) | 2012-11-28 | 2012-11-28 | Method for simultaneously treating industrial pickling waste water, washing waste water and chemical organic waste water |
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| Publication Number | Publication Date |
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| CN103073121B CN103073121B (en) | 2014-08-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103570114A (en) * | 2013-10-24 | 2014-02-12 | 上海大学 | Reduction treatment method for nitrates in water |
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| WO2004108608A1 (en) * | 2003-06-11 | 2004-12-16 | Seong Soo Hong | Method and apparatus for treating wastewater containing organic compound of high concentration |
| CN1569671A (en) * | 2003-07-24 | 2005-01-26 | 合肥工业大学 | Water treatment method for instant synthesis of laminated bis-hydroxide |
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2012
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| CN1506315A (en) * | 2002-12-10 | 2004-06-23 | 合肥工业大学 | Prepn of laminated dihydrogen oxide and its derivative quasi-periclase |
| WO2004108608A1 (en) * | 2003-06-11 | 2004-12-16 | Seong Soo Hong | Method and apparatus for treating wastewater containing organic compound of high concentration |
| CN1569671A (en) * | 2003-07-24 | 2005-01-26 | 合肥工业大学 | Water treatment method for instant synthesis of laminated bis-hydroxide |
| CN101376537A (en) * | 2008-09-24 | 2009-03-04 | 上海大学 | Method for processing electroplating waste containing Ni2+, Zn2+ and Cr3+ |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103570114A (en) * | 2013-10-24 | 2014-02-12 | 上海大学 | Reduction treatment method for nitrates in water |
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