CN110015794A - A kind of chemical wastewater treatment system and technique - Google Patents
A kind of chemical wastewater treatment system and technique Download PDFInfo
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- CN110015794A CN110015794A CN201810015768.4A CN201810015768A CN110015794A CN 110015794 A CN110015794 A CN 110015794A CN 201810015768 A CN201810015768 A CN 201810015768A CN 110015794 A CN110015794 A CN 110015794A
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- 239000000126 substance Substances 0.000 title claims abstract description 105
- 238000000034 method Methods 0.000 title claims abstract description 62
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 141
- 230000008014 freezing Effects 0.000 claims abstract description 50
- 238000007710 freezing Methods 0.000 claims abstract description 50
- 150000003839 salts Chemical class 0.000 claims abstract description 39
- 238000002425 crystallisation Methods 0.000 claims abstract description 22
- 230000008025 crystallization Effects 0.000 claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 claims abstract description 17
- 230000000694 effects Effects 0.000 claims abstract description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 86
- 239000002351 wastewater Substances 0.000 claims description 64
- 239000011780 sodium chloride Substances 0.000 claims description 40
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 39
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 24
- 239000013078 crystal Substances 0.000 claims description 23
- 230000008018 melting Effects 0.000 claims description 22
- 238000002844 melting Methods 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 17
- 229910052681 coesite Inorganic materials 0.000 claims description 16
- 229910052906 cristobalite Inorganic materials 0.000 claims description 16
- 239000012452 mother liquor Substances 0.000 claims description 16
- 239000000377 silicon dioxide Substances 0.000 claims description 16
- 229910052682 stishovite Inorganic materials 0.000 claims description 16
- 229910052905 tridymite Inorganic materials 0.000 claims description 16
- 239000011734 sodium Substances 0.000 claims description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 229910052799 carbon Inorganic materials 0.000 claims description 12
- 230000003750 conditioning effect Effects 0.000 claims description 12
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 10
- 239000006004 Quartz sand Substances 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 9
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 8
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 239000007832 Na2SO4 Substances 0.000 claims description 7
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 5
- 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
- 229910052740 iodine Inorganic materials 0.000 claims description 5
- 239000011630 iodine Substances 0.000 claims description 5
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims description 5
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 5
- 239000000395 magnesium oxide Substances 0.000 claims description 5
- 229910052708 sodium Inorganic materials 0.000 claims description 5
- 235000017550 sodium carbonate Nutrition 0.000 claims description 4
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 3
- 239000004571 lime Substances 0.000 claims description 3
- 238000004090 dissolution Methods 0.000 claims description 2
- HUAUNKAZQWMVFY-UHFFFAOYSA-M sodium;oxocalcium;hydroxide Chemical compound [OH-].[Na+].[Ca]=O HUAUNKAZQWMVFY-UHFFFAOYSA-M 0.000 claims description 2
- 239000000084 colloidal system Substances 0.000 abstract description 4
- 239000012535 impurity Substances 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 239000002245 particle Substances 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 description 17
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 15
- 229910001425 magnesium ion Inorganic materials 0.000 description 15
- 239000000243 solution Substances 0.000 description 14
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 12
- 229910001424 calcium ion Inorganic materials 0.000 description 12
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 8
- 238000005345 coagulation Methods 0.000 description 8
- 230000015271 coagulation Effects 0.000 description 8
- 239000003245 coal Substances 0.000 description 8
- 239000005416 organic matter Substances 0.000 description 7
- 229910001385 heavy metal Inorganic materials 0.000 description 6
- 230000001376 precipitating effect Effects 0.000 description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 5
- 238000005189 flocculation Methods 0.000 description 5
- 230000016615 flocculation Effects 0.000 description 5
- 150000002500 ions Chemical class 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 5
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 description 4
- 230000001112 coagulating effect Effects 0.000 description 4
- 239000003814 drug Substances 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
- 230000003311 flocculating effect Effects 0.000 description 4
- 239000011777 magnesium Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 239000011575 calcium Substances 0.000 description 3
- 239000003610 charcoal Substances 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 241000272814 Anser sp. Species 0.000 description 2
- 102000002322 Egg Proteins Human genes 0.000 description 2
- 108010000912 Egg Proteins Proteins 0.000 description 2
- 238000002306 biochemical method Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000003889 chemical engineering Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 210000004681 ovum Anatomy 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- UHXWLHYMUGRLKG-UHFFFAOYSA-N [Mg].O[Si](O)(O)O Chemical compound [Mg].O[Si](O)(O)O UHXWLHYMUGRLKG-UHFFFAOYSA-N 0.000 description 1
- 238000009303 advanced oxidation process reaction Methods 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 229940037003 alum Drugs 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- -1 coal-to-olefin Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000010742 number 1 fuel oil Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical class O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
Classifications
-
- 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
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
-
- 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
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
- C01P2006/82—Compositional purity water content
-
- 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
- C02F1/52—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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a kind of chemical wastewater treatment system, including pretreatment unit, more medium filter, efficient cryogenic inspissator and divide salt crystalline element；The highly dense pond water outlet of pretreatment unit is connected to the water inlet of more medium filter, the water outlet of more medium filter is connected to the water inlet of efficient cryogenic inspissator, the production mouth of a river of efficient cryogenic inspissator is connected to reuse water tank, and the concentrated water outlet of efficient cryogenic inspissator is connected to the water inlet for the freezing and crystallizing device for dividing salt crystalline element.The invention also discloses a kind of chemical wastewater treatment techniques, including pretreatment process, filter progress, enrichment process and Crystallization Procedure.The present invention takes full advantage of the characteristics of more medium filter, good to organic cod removal effect while removing colloid, impurity, particle, suspended matter, guarantees the stable operation of whole system.The advanced oxidation equipment that investment is high, operating cost is high is avoided simultaneously, and whole economic efficiency is good.
Description
Technical field:
The present invention relates to a kind of chemical wastewater treatment system and techniques, belong to water treatment field.
Background technique:
Wastewater from chemical industry, especially coal chemical industry enterprises produce during coal oil, ammonia from coal, coal-to-olefin, coal gas etc.
Raw waste water has the characteristics that salt content is high, hardness is high, COD content is high and biochemical is poor.
Currently, the main method of Coal Chemical Engineering Project wastewater treatment is " biochemical method+bi-membrane method+advanced oxidation processes+evaporative crystallization
Method ".Wastewater from chemical industry passes sequentially through ultrafiltration+reverse osmosis double film devices and carries out film concentration after biochemical degradation keeps organic matter up to standard
Processing, obtains recycle-water and film concentration concentrated water, and recycle-water returns to production system and recycles；Since film concentration makes film dense
COD in reduced concentration water is multiplied, and needs after advanced oxidation degradation, handles to obtain recycle-water and portion using evaporative crystallization
Divide strong brine or crystal salt.
On the one hand, biochemical method be by artificial aeration supply oxygen and using microorganism decomposition to reach removal waste water in can
The method of the insoluble organic matter of the organic matter of dissolubility and part still due to the high saliferous characteristic of wastewater from chemical industry, leads to micro- life
Object is difficult to adapt to, or even dehydration is dead, therefore useless Organic substance in water is difficult to up to standard, i.e., can not generate qualified waste water；
On the other hand, the prior art needs to lead to existing Coal Chemical Engineering Project waste water by removal COD and concentration repeatedly
Processing system is complicated, the construction period is long, construction investment is big, operating cost is high, process flow is complicated and treatment effect is undesirable etc.
Problem.It can be seen that develop it is a kind of it is economical, rationally, simple process, the processing system of stable wastewater from chemical industry and technique gesture
It must go.
Summary of the invention:
It is a kind of economical, reasonable, simple process, stable wastewater from chemical industry that the first purpose of this invention is to provide
Processing system.
It is a kind of economical, reasonable, simple process, stable wastewater from chemical industry that second object of the present invention is to provide
Treatment process.
The first purpose of this invention is implemented by following technical solution: a kind of chemical wastewater treatment system comprising pre- place
It manages unit, more medium filter, efficient cryogenic inspissator and divides salt crystalline element；The highly dense pond water outlet of the pretreatment unit
It is connected to the water inlet of the more medium filter, the water outlet of the more medium filter and the efficient cryogenic inspissator
Water inlet connection, the production mouth of a river of the efficient cryogenic inspissator are connected to reuse water tank, the concentrated water of the efficient cryogenic inspissator
Outlet is connected to the water inlet of the freezing and crystallizing device for dividing salt crystalline element.
Further, the pretreatment unit includes sequentially connected conditioning tank and the highly dense pond.
Further, described that salt crystalline element is divided to include the freezing and crystallizing device, melting crystallizer and NaCl evaporative crystallization
The freezing mother liquor outlet of device, the freezing and crystallizing device is connected to the water inlet of the NaCl crystallizing evaporator, the freezing and crystallizing
The saltcake outlet of device is connected to the water inlet of the melting crystallizer；The production mouth of a river of the NaCl crystallizing evaporator, the melting
The production mouth of a river of crystallizer is connected to the reuse water tank.
Further, the inner cavity of the more medium filter has been sequentially filled goose ovum from water inlet one end to water outlet one end
Stone, quartz sand and active carbon, the partial size of the cobblestone are 2-4mm, and the granularity of the quartz sand is 0.5-1.2mm, the work
Property charcoal partial size be 0.5-1.0mm, iodine sorption value >=1100mg/g of the active carbon.
Second object of the present invention is implemented by following technical solution: a kind of chemical wastewater treatment technique comprising as follows
Process: (1) pretreatment process；(2) filter progress；(3) enrichment process；(4) Crystallization Procedure；Wherein:
(1) pretreatment process:
Will separate sources wastewater from chemical industry be added chemical wastewater treatment system conditioning tank in mix it is quenched after, described in feeding
In the highly dense pond of chemical wastewater treatment system, wastewater from chemical industry initially enters the coagulation area in the highly dense pond, by adding liquid alkaline tune
Inlet flow-patterm is saved to 10~12.5, then adds the CO in soda ash or lime, with water3 2-、HCO3 -、Ca2+、Mg2+Reaction generates CaCO3
With Mg (OH)2Precipitating；At the same time, sodium metaaluminate and magnesia are added to the coagulating area in the highly dense pond, with 70~
The speed of 100r/min stirs, and reacts 20~60min, effectively adsorbs the soluble silicon in the wastewater from chemical industry, form indissoluble
Silicic acid magnesium precipitate, to make the SiO in raw water2It is effectively removed；Wastewater from chemical industry and medicament stir in coagulation area by quick
Afterwards, into flocculation reaction area.In flocculation reaction area, the bodied ferric sulfate of the 5~10m% of wastewater from chemical industry is accounted for by adding,
With the PAM for accounting for the 3~5m of wastewater from chemical industry ‰, the precipitating in water is made to flocculate, is stirred with the speed of 15~25r/min, reaction 10
After~30min, the substance of the formation such as hardness, turbidity, heavy metal in the wastewater from chemical industry is formed into biggish floccule body (i.e. alum
Flower) carry out precipitation and separation.In the process, overwhelming majority Ca in raw water2+、Mg2+It is removed, water outlet is softened；Together
When, partial organic substances, heavy metal ion, SiO in wastewater from chemical industry2Precipitating is generated also by chemical reaction or passes through flocculating setting
It is removed；Finally, adjust pH to 6~9 by adding hydrochloric acid toward exhalant region, obtain hardness≤100mg/L, basicity≤
50mg/L、SiO2The solution after pretreatment of≤5mg/L；
(2) filter progress:
The solution after pretreatment is pumped into the more medium filter of the chemical wastewater treatment system and is filtered processing,
Obtain turbidity < 0.1NTU, SDI < 2.5, liquid after the filtering of COD < 20mg/L；
(3) enrichment process:
The efficient cryogenic inspissator that liquid pump after the filtering is entered to the chemical wastewater treatment system, is heated to 50-90 DEG C,
1-3h is stopped, obtains producing water and 180000mg/L≤TDS≤220000mg/L concentrated water；
(4) Crystallization Procedure:
The concentrated water initially enters freezing and crystallizing in the freezing and crystallizing device of the chemical wastewater treatment system, in freezing and crystallizing
Temperature is reduced to -5 DEG C or so in device, at this point, sodium sulphate freezes precipitation in the form of saltcake, and sodium chloride continues to stay in freezing
In mother liquor, saltcake and freezing mother liquor are obtained；Enter the fused junction of the chemical wastewater treatment system after the saltcake dissolution
Crystallization, obtains Na in brilliant device2SO4Crystal salt, the NaCl that the freezing mother liquor enters the chemical wastewater treatment system evaporate
Evaporative crystallization in crystallizer obtains NaCl crystal salt.
Further, the chemical wastewater treatment system includes pretreatment unit, the more medium filter, the low temperature
Efficient concentration device and divide salt crystalline element；The water inlet of highly dense the pond water outlet and the more medium filter of the pretreatment unit
Mouth connection, the water outlet of the more medium filter are connected to the water inlet of the efficient cryogenic inspissator, the efficient cryogenic
The production mouth of a river of inspissator is connected to reuse water tank, the concentrated water of efficient cryogenic inspissator outlet and the salt crystalline element that divides
The water inlet of freezing and crystallizing device is connected to.
Further, the pretreatment unit includes the sequentially connected conditioning tank and the highly dense pond.
Further, described that salt crystalline element is divided to include the freezing and crystallizing device, the melting crystallizer and the NaCl
The freezing mother liquor outlet of crystallizing evaporator, the freezing and crystallizing device is connected to the water inlet of the NaCl crystallizing evaporator, described
The saltcake outlet of freezing and crystallizing device is connected to the water inlet of the melting crystallizer；The production mouth of a river of the NaCl crystallizing evaporator,
The production mouth of a river of the melting crystallizer is connected to the reuse water tank.
Further, the inner cavity of the more medium filter has been sequentially filled goose ovum from water inlet one end to water outlet one end
Stone, quartz sand and active carbon, the partial size of the cobblestone are 2-4mm, and the granularity of the quartz sand is 0.5-1.2mm, the work
Property charcoal partial size be 0.5-1.0mm, iodine sorption value >=1100mg/g of the active carbon.
Advantages of the present invention:
1, the characteristics of present invention takes full advantage of the multiple filling layers of more medium filter, removing, colloid, suspended matter etc. are miscellaneous
It is good to organic cod removal effect while matter, avoid salt content height in waste water cause microorganism to be difficult to adapt to, waste water
Organic matter is difficult to problem up to standard, guarantees the stable operation of whole system.
2, the present invention has overturned the technique of traditional coal chemical wastewater treatment bi-membrane method, avoids the dirt in film application process
Dye, blocking, the problems such as period is long reduce dosing, reduce the influence of fluctuation of service factor to the greatest extent；And this hair
It is bright that there are the advantages such as process flow is simple, investment is low, occupied area is small, easy to operate, operation maintenance facilitates.
3, more medium filter and efficient cryogenic inspissator are used in combination in the present invention, using more medium filter from system
The pollutants such as colloid, impurity, particle, suspended matter and organic cod are disposably solved in the lower situation of front end salt content, efficiently
Stable treatment effect makes the pollutants such as colloid in waste water, impurity, particle, suspended matter and organic cod content be maintained at pole
Low state.In conjunction with efficient cryogenic inspissator, disposably industrial wastewater to be processed is concentrated to close to saturation, while being met organic
Object COD content does not influence evaporation and crystal process.The technique for removing pollutant, organic matter again is first concentrated instead of tradition by the present invention,
Because various pollutants, the removal efficiency of organic matter are lower in the higher aquatic environment of salt content, organic matter can be greatly reduced
Difficulty is removed, while avoiding the use of with high investment, high energy consumption, the advanced oxidation system of high operating cost, it is economical, reasonable.
4, the present invention obtains the costly Na of by-product by dividing salt crystallization treatment2SO4Crystal and NaCl crystal, and produce water
From vapo(u)rization system, water quality is high, can be used as recycle-water recycling；Realize the resource utilization of high slat-containing wastewater.
Detailed description of the invention:
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is system schematic of the invention.
Process flow chart Fig. 2 of the invention.
In figure: conditioning tank 1, highly dense pond 2, more medium filter 3, efficient cryogenic inspissator 4, freezing and crystallizing device 5, fused junction
Brilliant device 6, NaCl crystallizing evaporator 7, reuse water tank 8.
Specific embodiment:
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under that premise of not paying creative labor
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1:
A kind of chemical wastewater treatment system as shown in Figure 1 comprising conditioning tank 1, highly dense pond 2, more medium filter 3,
Efficient cryogenic inspissator 4, freezing and crystallizing device 5, melting crystallizer 6 and NaCl crystallizing evaporator 7,
The water outlet of conditioning tank 1 is connected to the water inlet in highly dense pond 2, highly dense 2 water outlet of pond and more medium filter 3 into
Mouth of a river connection, the water outlet of more medium filter 3 are connected to the water inlet of efficient cryogenic inspissator 4, efficient cryogenic inspissator 4
It produces the mouth of a river to be connected to reuse water tank 8, the concentrated water outlet of efficient cryogenic inspissator 4 is connected to the water inlet of freezing and crystallizing device 5, is freezed
The saltcake outlet of crystallizer 5 is connected to the water inlet of melting crystallizer 6, and the freezing mother liquor outlet and NaCl of freezing and crystallizing device 5 steam
Send out the water inlet connection of crystallizer 7；The production mouth of a river of melting crystallizer 6 and NaCl crystallizing evaporator 7 is connected to reuse water tank 8.
The inner cavity of more medium filter 3 be sequentially filled from water inlet one end to water outlet one end cobblestone, quartz sand and
Active carbon, the partial size of cobblestone are 2-4mm, and the granularity of quartz sand is 0.5-1.2mm, and the partial size of active carbon is 0.5-1.0mm, living
Iodine sorption value >=1100mg/g of property charcoal.
Embodiment 2:
Wastewater from chemical industry is handled using 1 chemical wastewater treatment system of embodiment, wherein waste water picks up from certain coal chemical industry enterprises, successively
It is handled by following process:
(1) pretreatment process:
Will wastewater from chemical industry be added conditioning tank 1 in mix it is quenched after, wherein the wastewater from chemical industry Q:45m after quenched3/ h, COD:
300mg/L, TDS:10536mg/L, Cl-: 4246mg/L, SO4 2-: 2009mg/L, total hardness: 218mg/L, total alkalinity: 442mg/
L, SiO2: 130mg/L, turbidity: 12NTU, suspended matter: 8mg/L, pH:8.05；
Then be sent into highly dense pond 2, wastewater from chemical industry initially enters the coagulation area in highly dense pond 2, by add liquid alkaline adjust into
Water pH to 10, then adds soda ash, with the CO in water3 2-、HCO3 -、Ca2+、Mg2+Reaction generates CaCO3With Mg (OH)2Precipitating；With
This simultaneously, the coagulating area in the pond Xiang Gaomi adds the magnesia of the sodium metaaluminate and 45mg/L that account for wastewater from chemical industry 100mg/L, with
The speed of 70r/min stirs, and reacts 20min, effectively adsorbs the soluble silicon in wastewater from chemical industry, form the silicic acid chemical combination of indissoluble
Object, to make the SiO in raw water2It is effectively removed；Wastewater from chemical industry and medicament in coagulation area after quickly stirring, into wadding
Solidifying reaction zone.In flocculation reaction area, the bodied ferric sulfate of wastewater from chemical industry 10m% is accounted for by adding, and accounts for wastewater from chemical industry 5m ‰
PAM, so that the precipitating in water is flocculated, stirred with the speed of 25r/min, after reacting 10min, by hardness in wastewater from chemical industry, turbidity,
The substance of the formation such as heavy metal forms biggish floccule body (i.e. alumen ustum) and carries out precipitation and separation.In the process, big absolutely in raw water
Part Ca2+、Mg2+It is removed, water outlet is softened；Meanwhile partial organic substances in wastewater from chemical industry, heavy metal ion,
SiO2Precipitating is generated also by chemical reaction or is removed by flocculating setting, so that the Ca in wastewater from chemical industry2+、Mg2+Deng
Ion is effectively removed；Finally, adjusting pH to 8.5 by adding hydrochloric acid toward exhalant region, obtaining solution after pretreatment；
(2) filter progress:
Solution after pretreatment is pumped into more medium filter 3 and is filtered processing, liquid after being filtered；Wherein, after filtering
Liquid total hardness: 28mg/L, removal rate is up to 87.1%；Total alkalinity: 45mg/L, removal rate is up to 89.8%；SiO2: 2mg/L, removal rate
Up to 98.5%；COD:14mg/L, removal rate is up to 95.3%；Turbidity: 0.05NTU, removal rate is up to 99%；Suspended matter: 0mg/L is gone
Except rate is up to 100%, SDI=2.0；
(3) enrichment process:
Liquid pump after filtering is entered into efficient cryogenic inspissator 4, is heated to 65 DEG C, stops 2.5h, obtains producing water and concentrated water,
In, produce water Q:40.5m3/ h, COD:0.1mg/L, TDS:223mg/L, Cl-: 90mg/L, SO4 2-: 43mg/L, total hardness: 0mg/L,
Total alkalinity: 0.7mg/L, SiO2: 0mg/L, turbidity: 0NTU, suspended matter: 0mg/L, pH:7.5；Water quality is substantially better than " municipal sewage
Regeneration industry water standard " (GB/T 19923-2005) defined " Open recirling cooling water system supplement water " standard,
It can be recycled directly as recycle-water；
Concentrated water Q:2.2m3/ h, COD:280mg/L, TDS:202900mg/L, Cl-: 85000mg/L, SO4 2-: 40180mg/L,
Total hardness: 560mg/L, total alkalinity: 1300mg/L, SiO2: 36mg/L, turbidity: 0.9NTU, suspended matter: 0mg/L, pH:7.5.
(4) Crystallization Procedure:
Concentrated water initially enters freezing and crystallizing device 5 and carries out freezing and crystallizing, and temperature is reduced to -5 DEG C in freezing and crystallizing device 5,
At this point, Na2SO4It is freezed and is precipitated in the form of saltcake, and NaCl continues to stay in freezing mother liquor；It is later that the saltcake of high-purity is molten
Solution enters in melting crystallizer 6, finally obtains the Na of high-purity2SO4Crystal salt；Freezing mother liquor enters NaCl crystallizing evaporator 7
Crystallization, obtains NaCl crystal salt；The production water that melting crystallizer 6 and NaCl crystallizing evaporator 7 generate in crystallization process, can be used as
Recycle-water is recycled.
The NaCl crystal salt 314.8kg/h finally generated, wherein NaCl:95%, moisture: 4%, water-insoluble: 0.2%,
Calcium ions and magnesium ions: 0.2%, SO4 2-: 0.6%, meet " solarization Nacl level-one " mark in " Nacl " (GB/T5462-2015)
It is quasi-；
The Na finally generated2SO4Crystal salt 133.7kg/h, wherein Na2SO4: 99%, moisture: 0.4%, calcium ions and magnesium ions:
0.2%, Cl-: 0.4%, whiteness (R457): 85, crystal salt quality meets " industrial anhydrous sodium sulfate " (GB/T 6009-2014)
In " II class qualified product " standard.
Embodiment 3:
Wastewater from chemical industry is handled using 1 chemical wastewater treatment system of embodiment, wherein waste water picks up from certain coal chemical industry enterprises, successively
It is handled by following process:
(1) pretreatment process:
Will wastewater from chemical industry be added conditioning tank 1 in mix it is quenched after, wherein the wastewater from chemical industry Q:10m after quenched3/ h, COD:
150mg/L, TDS:31719mg/L, Cl-: 15400mg/L, SO4 2-: 2030mg/L, total hardness: 1897mg/L, total alkalinity:
983mg/L, SiO2: 75mg/L, turbidity: 0.6NTU, suspended matter: 20mg/L, pH:8.6；
Then be sent into highly dense pond 2, wastewater from chemical industry initially enters the coagulation area in highly dense pond 2, by add liquid alkaline adjust into
Water pH to 11.5, then adds soda ash, with the CO in water3 2-、HCO3 -、Ca2+、Mg2+Reaction generates CaCO3With Mg (OH)2Precipitating；
At the same time, the coagulating area in the pond Xiang Gaomi 2 adds the magnesia of the sodium metaaluminate and 35mg/L that account for wastewater from chemical industry 85mg/L,
It is stirred with the speed of 80r/min, reacts 60min, effectively adsorb the soluble silicon in wastewater from chemical industry, form the silicic acid chemical combination of indissoluble
Object, to make the SiO in raw water2It is effectively removed；Wastewater from chemical industry and medicament in coagulation area after quickly stirring, into wadding
Solidifying reaction zone.In flocculation reaction area, the bodied ferric sulfate of wastewater from chemical industry 5m% is accounted for by adding, and accounts for wastewater from chemical industry 3m's ‰
PAM makes the precipitating in water flocculate, and is stirred with the speed of 15r/min, after reacting 30min, by hardness in wastewater from chemical industry, turbidity, again
The substance of the formation such as metal forms biggish floccule body (i.e. alumen ustum) and carries out precipitation and separation.In the process, exhausted big portion in raw water
Divide Ca2+、Mg2+It is removed, water outlet is softened；Meanwhile the partial organic substances in wastewater from chemical industry, heavy metal ion, SiO2
Precipitating is generated also by chemical reaction or is removed by flocculating setting, so that the Ca in wastewater from chemical industry2+、Mg2+Plasma
Effectively removed；Finally, adjusting pH to 7.5 by adding hydrochloric acid toward exhalant region, obtaining solution after pretreatment；
(2) filter progress:
Solution after pretreatment is pumped into more medium filter 3 and is filtered processing, liquid after being filtered；Wherein, after filtering
Liquid total hardness: 96mg/L, removal rate is up to 94.9%；Total alkalinity: 50mg/L, removal rate is up to 94.9%；SiO2: 5mg/L, removal rate
Up to 93.3%；COD:15mg/L, removal rate is up to 90%；Turbidity: 0.02NTU, removal rate is up to 96.7%；Suspended matter: 0.5mg/L,
Removal rate is up to 97.5%, SDI=1.5；
(3) enrichment process:
Liquid pump after filtering is entered into efficient cryogenic inspissator 4, is heated to 50 DEG C, stops 3h, obtains producing water and concentrated water, wherein
Produce water Q:8.3m3/ h, COD:0.1mg/L, TDS:195mg/L, Cl-: 75mg/L, SO4 2-: 23mg/L, total hardness: 0.1mg/L, always
Basicity: 0.5mg/L, SiO2: 0mg/L, pH:8.0；Water quality is substantially better than " urban sewage reutilization industry water standard " (GB/
T 19923-2005) as defined in " Open recirling cooling water system supplement water " standard, can be recycled directly as recycle-water；
Concentrated water Q:1.7m3/ h, COD:88.2mg/L, TDS:186582.4mg/L, Cl-: 90222mg/L, SO4 2-:
11828.9mg/L, total hardness: 497.5mg/L, total alkalinity: 293.6mg/L, SiO2: 88.2mg/L, pH:8.0.
(4) Crystallization Procedure:
Concentrated water initially enters freezing and crystallizing device 5 and carries out freezing and crystallizing, and temperature is reduced to -5 DEG C in freezing and crystallizing device 5,
At this point, Na2SO4It is freezed and is precipitated in the form of saltcake, and NaCl continues to stay in freezing mother liquor；It is later that the saltcake of high-purity is molten
Solution enters in melting crystallizer 6, finally obtains the Na of high-purity2SO4Crystal salt；Freezing mother liquor enters NaCl crystallizing evaporator 7
Crystallization, obtains NaCl crystal salt；The production water that melting crystallizer 6 and NaCl crystallizing evaporator 7 generate in crystallization process, can be used as
Recycle-water is recycled.
The NaCl crystal salt 228.4kg/h finally generated, wherein NaCl:97%, moisture: 2.3%, water-insoluble:
0.1%, SO4 2-: 0.6%, meet " solarization Nacl level-one " standard in " Nacl " (GB/T 5462-2015)；
The Na finally generated2SO4Crystal salt 27.0kg/h, wherein Na2SO4: 98.5%, moisture: 0.5%, calcium ions and magnesium ions:
0.3%, Cl-: 0.7%, whiteness (R457): 85, crystal salt quality meets " industrial anhydrous sodium sulfate " (GB/T 6009-2014)
In " II class qualified product " standard.
Embodiment 4:
Wastewater from chemical industry is handled using 1 chemical wastewater treatment system of embodiment, wherein waste water picks up from certain coal chemical industry enterprises, successively
It is handled by following process:
(1) pretreatment process:
Will wastewater from chemical industry be added conditioning tank 1 in mix it is quenched after, wherein the wastewater from chemical industry Q:30m after quenched3/ h, COD:
300mg/L, TDS:52872mg/L, Cl-: 18725mg/L, SO4 2-: 13120mg/L, total hardness: 505mg/L, total alkalinity:
647mg/L, SiO2: 57mg/L, turbidity: 1.3NTU, suspended matter: 12mg/L, pH:8.9；
Then be sent into highly dense pond 2, wastewater from chemical industry initially enters the coagulation area in highly dense pond 2, by add liquid alkaline adjust into
Water pH to 10.5, the then CO in feeding lime, with water3 2-、HCO3 -、Ca2+、Mg2+Reaction generates CaCO3With Mg (OH)2Precipitating；
At the same time, the coagulating area in the pond Xiang Gaomi 2 adds the magnesia of the sodium metaaluminate and 40mg/L that account for wastewater from chemical industry 90mg/L,
It is stirred with the speed of 75r/min, reacts 27min, effectively adsorb the soluble silicon in wastewater from chemical industry, form the silicic acid chemical combination of indissoluble
Object, to make the SiO in raw water2It is effectively removed；Wastewater from chemical industry and medicament in coagulation area after quickly stirring, into wadding
Solidifying reaction zone.In flocculation reaction area, the bodied ferric sulfate of wastewater from chemical industry 8m% is accounted for by adding, and accounts for wastewater from chemical industry 4m's ‰
PAM makes the precipitating in water flocculate, and is stirred with the speed of 13r/min, after reacting 20min, by hardness in wastewater from chemical industry, turbidity, again
The substance of the formation such as metal forms biggish floccule body (i.e. alumen ustum) and carries out precipitation and separation.In the process, exhausted big portion in raw water
Divide Ca2+、Mg2+It is removed, water outlet is softened；Meanwhile the partial organic substances in wastewater from chemical industry, heavy metal ion, SiO2
Precipitating is generated also by chemical reaction or is removed by flocculating setting；Finally, being adjusted by adding hydrochloric acid toward exhalant region
PH to 6.5, obtains solution after pretreatment；
(2) filter progress:
Solution after pretreatment is pumped into more medium filter 3 and is filtered processing, liquid after being filtered；Wherein, after filtering
Liquid total hardness: 76mg/L, removal rate is up to 85%；Total alkalinity: 45mg/L, removal rate is up to 93.0%；SiO2: 5mg/L, removal rate reach
91.2%；COD:19mg/L, removal rate is up to 93.7%；Turbidity: 0.01NTU, removal rate is up to 97.7%；Suspended matter: 0mg/L is gone
Except rate is up to 100%, SDI=1.2；
(3) enrichment process:
Liquid pump after filtering is entered into efficient cryogenic inspissator 4, is heated to 90 DEG C, stops 1.2h, obtains producing water and concentrated water,
In, produce water Q:21.6m3/ h, COD:0.5mg/L, TDS:118mg/L, Cl-: 47mg/L, SO4 2-: 26mg/L, total hardness: 0.1mg/
L, total alkalinity: 2mg/L, pH:7.8；Water quality is substantially better than " urban sewage reutilization industry water standard " (GB/T 19923-
2005) " Open recirling cooling water system supplement water " standard as defined in, can be recycled directly as recycle-water；
Concentrated water Q:8.4m3/ h, COD:66.6mg/L, TDS:211488mg/L, Cl-: 66754mg/L, SO4 2-: 46790mg/
L, total hardness: 271mg/L, total alkalinity: 156mg/L, SiO2: 71mg/L, turbidity: 0.1NTU, pH:7.6.
(4) Crystallization Procedure:
Concentrated water initially enters freezing and crystallizing device 5 and carries out freezing and crystallizing, and temperature is reduced to -5 DEG C in freezing and crystallizing device 5,
At this point, Na2SO4It is freezed and is precipitated in the form of saltcake, and NaCl continues to stay in freezing mother liquor；It is later that the saltcake of high-purity is molten
Solution enters in melting crystallizer 6, finally obtains the Na of high-purity2SO4Crystal salt；Freezing mother liquor enters NaCl crystallizing evaporator 7
Crystallization, obtains NaCl crystal salt；The production water that melting crystallizer 6 and NaCl crystallizing evaporator 7 generate in crystallization process, can be used as
Recycle-water is recycled.
The NaCl crystal salt 925.7kg/h finally generated, wherein NaCl:99.0%, moisture: 0.6%, water-insoluble:
0.1%, calcium ions and magnesium ions: 0.2%, SO4 2-: 0.1%, meet " the solarization Nacl one in " Nacl " (GB/T 5462-2003)
Grade " standard；
The Na finally generated2SO4Crystal salt 582.2kg/h, wherein Na2SO4: 99.0%, moisture: 0.5%, calcium ions and magnesium ions:
0.2%, Cl-: 0.3%, crystal salt quality meets " the II class qualification in " industrial anhydrous sodium sulfate " (GB/T 6009-2014)
Product " standard.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of chemical wastewater treatment system, which is characterized in that it includes pretreatment unit, more medium filter, efficient cryogenic
Inspissator and divide salt crystalline element；The highly dense pond water outlet of the pretreatment unit and the water inlet of the more medium filter connect
Logical, the water outlet of the more medium filter is connected to the water inlet of the efficient cryogenic inspissator, the efficient cryogenic concentration
The production mouth of a river of device is connected to reuse water tank, concentrated water outlet and the freezing for dividing salt crystalline element of the efficient cryogenic inspissator
The water inlet of crystallizer is connected to.
2. a kind of chemical wastewater treatment system according to claim 1, which is characterized in that the pretreatment unit includes successively
The conditioning tank of connection and the highly dense pond.
3. a kind of chemical wastewater treatment system according to claim 1 or claim 2, which is characterized in that described to divide salt crystalline element packet
Include the freezing and crystallizing device, melting crystallizer and NaCl crystallizing evaporator, the freezing mother liquor outlet of the freezing and crystallizing device and institute
State the water inlet connection of NaCl crystallizing evaporator, the water inlet of the saltcake outlet and the melting crystallizer of the freezing and crystallizing device
Connection；The production mouth of a river of the NaCl crystallizing evaporator, the production mouth of a river of the melting crystallizer are connected to the reuse water tank.
4. a kind of chemical wastewater treatment system according to claim 1, which is characterized in that the inner cavity of the more medium filter
Cobblestone, quartz sand and active carbon are sequentially filled from water inlet one end to water outlet one end, the partial size of the cobblestone is 2-
4mm, the granularity of the quartz sand are 0.5-1.2mm, and the partial size of the active carbon is 0.5-1.0mm, and the iodine of the active carbon is inhaled
Assignments >=1100mg/g.
5. a kind of chemical wastewater treatment technique, which is characterized in that it is comprised the following steps: (1) pretreatment process；(2) filterer
Sequence；(3) enrichment process；(4) Crystallization Procedure；Wherein:
(1) pretreatment process:
Will separate sources wastewater from chemical industry be added chemical wastewater treatment system conditioning tank in mix it is quenched after, be sent into highly dense pond,
PH to 10~12.5 is adjusted first；Next adds soda ash or lime, then adds sodium metaaluminate and magnesia, while with 70~
The speed of 100r/min stirs, and the bodied ferric sulfate for accounting for the 5~10m% of wastewater from chemical industry is added after reacting 20~60min, and account for
The PAM of the 3~5m of wastewater from chemical industry ‰, the PAM are added in the form of the PAM flocculant that concentration is 3~5m ‰；Simultaneously with 15~
The speed of 20r/min stirs, and after reacting 10~30min, adjusts the pH to 6~9 of the wastewater from chemical industry, obtains hardness≤100mg/
L, basicity≤50mg/L, SiO2The solution after pretreatment of≤5mg/L；
(2) filter progress:
The solution after pretreatment is pumped into the more medium filter of the chemical wastewater treatment system and is filtered processing, obtained
Turbidity < 0.1NTU, SDI < 2.5, liquid after the filtering of COD < 20mg/L；
(3) enrichment process:
The efficient cryogenic inspissator that liquid pump after the filtering is entered to the chemical wastewater treatment system is heated to 50-90 DEG C, stops
1-3h obtains producing water and 180000mg/L≤TDS≤220000mg/L concentrated water；
(4) Crystallization Procedure:
The concentrated water initially enters freezing and crystallizing in the freezing and crystallizing device of the chemical wastewater treatment system, obtains saltcake and cold
Freeze mother liquor；Enter fusion-crystallization in the melting crystallizer of the chemical wastewater treatment system after the saltcake dissolution, obtains
Na2SO4Crystal salt, the freezing mother liquor enter evaporative crystallization in the NaCl crystallizing evaporator of the chemical wastewater treatment system, obtain
To NaCl crystal salt.
6. a kind of chemical wastewater treatment technique according to claim 5, which is characterized in that the chemical wastewater treatment system packet
It includes pretreatment unit, the more medium filter, the efficient cryogenic inspissator and divides salt crystalline element；The pretreatment unit
Highly dense pond water outlet be connected to the water inlet of the more medium filter, the water outlet of the more medium filter with it is described low
The water inlet of warm efficient concentration device is connected to, and the production mouth of a river of the efficient cryogenic inspissator is connected to reuse water tank, and the low temperature is high
The concentrated water outlet of effect inspissator is connected to the water inlet of the freezing and crystallizing device for dividing salt crystalline element.
7. a kind of chemical wastewater treatment technique according to claim 6, which is characterized in that the pretreatment unit includes successively
The conditioning tank of connection and the highly dense pond.
8. a kind of chemical wastewater treatment technique described according to claim 6 or 7, which is characterized in that described to divide salt crystalline element packet
Include the freezing and crystallizing device, the melting crystallizer and the NaCl crystallizing evaporator, the freezing mother liquor of the freezing and crystallizing device
Outlet is connected to the water inlet of the NaCl crystallizing evaporator, saltcake outlet and the melting crystallizer of the freezing and crystallizing device
Water inlet connection；The NaCl crystallizing evaporator produce the mouth of a river, the melting crystallizer the production mouth of a river with the recycle-water
Case connection.
9. a kind of chemical wastewater treatment technique according to claim 6, which is characterized in that the inner cavity of the more medium filter
Cobblestone, quartz sand and active carbon are sequentially filled from water inlet one end to water outlet one end, the partial size of the cobblestone is 2-
4mm, the granularity of the quartz sand are 0.5-1.2mm, and the partial size of the active carbon is 0.5-1.0mm, and the iodine of the active carbon is inhaled
Assignments >=1100mg/g.
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| CN105036222A (en) * | 2015-08-19 | 2015-11-11 | 石家庄工大化工设备有限公司 | High-salinity wastewater recovery treatment method |
| CN105523666A (en) * | 2016-01-30 | 2016-04-27 | 内蒙古久科康瑞环保科技有限公司 | Strengthened pretreatment system for high-salt-content industrial wastewater and production process of strengthened pretreatment system |
| CN105585194A (en) * | 2016-01-07 | 2016-05-18 | 王文领 | Comprehensive utilization method of high-concentration waste saline water containing Na<+>, Ka<+>, NH<4+>, Cl<->, SO4<2-> and NO<3-> in coal chemical industry |
| CN106830481A (en) * | 2017-02-15 | 2017-06-13 | 东华工程科技股份有限公司 | Organic impurities and the method for separating salinity in a kind of utilization membrane separating Coal Chemical Industry high slat-containing wastewater |
| CN207862096U (en) * | 2018-01-08 | 2018-09-14 | 内蒙古久科康瑞环保科技有限公司 | A kind of chemical wastewater treatment system |
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2018
- 2018-01-08 CN CN201810015768.4A patent/CN110015794A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105036222A (en) * | 2015-08-19 | 2015-11-11 | 石家庄工大化工设备有限公司 | High-salinity wastewater recovery treatment method |
| CN105585194A (en) * | 2016-01-07 | 2016-05-18 | 王文领 | Comprehensive utilization method of high-concentration waste saline water containing Na<+>, Ka<+>, NH<4+>, Cl<->, SO4<2-> and NO<3-> in coal chemical industry |
| CN105523666A (en) * | 2016-01-30 | 2016-04-27 | 内蒙古久科康瑞环保科技有限公司 | Strengthened pretreatment system for high-salt-content industrial wastewater and production process of strengthened pretreatment system |
| CN106830481A (en) * | 2017-02-15 | 2017-06-13 | 东华工程科技股份有限公司 | Organic impurities and the method for separating salinity in a kind of utilization membrane separating Coal Chemical Industry high slat-containing wastewater |
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