CN104098205B - Acid-washing stainless steel line emulsion treatment system and treatment process - Google Patents
Acid-washing stainless steel line emulsion treatment system and treatment process Download PDFInfo
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- CN104098205B CN104098205B CN201410351598.9A CN201410351598A CN104098205B CN 104098205 B CN104098205 B CN 104098205B CN 201410351598 A CN201410351598 A CN 201410351598A CN 104098205 B CN104098205 B CN 104098205B
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- 239000000839 emulsion Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 40
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 33
- 239000010935 stainless steel Substances 0.000 title claims abstract description 33
- 230000008569 process Effects 0.000 title claims abstract description 32
- 238000005406 washing Methods 0.000 title claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 239000010802 sludge Substances 0.000 claims abstract description 41
- 230000003647 oxidation Effects 0.000 claims abstract description 23
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 23
- 238000005188 flotation Methods 0.000 claims abstract description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 230000001804 emulsifying effect Effects 0.000 claims abstract description 11
- 239000010808 liquid waste Substances 0.000 claims abstract description 11
- 238000001914 filtration Methods 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 7
- 239000002351 wastewater Substances 0.000 claims description 62
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 16
- 239000003795 chemical substances by application Substances 0.000 claims description 16
- 238000005189 flocculation Methods 0.000 claims description 14
- 230000016615 flocculation Effects 0.000 claims description 14
- 239000010865 sewage Substances 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 11
- 239000011790 ferrous sulphate Substances 0.000 claims description 9
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 9
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 9
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 150000003839 salts Chemical class 0.000 claims description 7
- 238000001179 sorption measurement Methods 0.000 claims description 7
- 239000002594 sorbent Substances 0.000 claims description 6
- 239000003814 drug Substances 0.000 claims description 5
- 239000000701 coagulant Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 238000001556 precipitation Methods 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 3
- 239000007859 condensation product Substances 0.000 claims description 3
- 238000000354 decomposition reaction Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 claims description 3
- 239000006228 supernatant Substances 0.000 claims description 3
- 238000005554 pickling Methods 0.000 abstract 1
- 239000002699 waste material Substances 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 4
- 238000005354 coacervation Methods 0.000 description 4
- 235000013336 milk Nutrition 0.000 description 4
- 239000008267 milk Substances 0.000 description 4
- 210000004080 milk Anatomy 0.000 description 4
- 239000003610 charcoal Substances 0.000 description 3
- 239000003995 emulsifying agent Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000000968 medical method and process Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000005185 salting out Methods 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 229940037003 alum Drugs 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 238000005555 metalworking Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 229920002401 polyacrylamide Polymers 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 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 description 1
- 241000237502 Ostreidae Species 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 230000003851 biochemical process Effects 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910000365 copper sulfate Inorganic materials 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 150000002632 lipids Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000007764 o/w emulsion Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 235000020636 oyster Nutrition 0.000 description 1
- -1 petroleum-type Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical class O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention provides a kind of acid-washing stainless steel line emulsion treatment system, comprise the oil trap set gradually by treatment scheme, first reactive tank, air flotation pool, second reactive tank, first settling tank, oxidation pond, second settling tank, intermediate pool, mechanical filter and activated charcoal filter, for emulsifying liquid waste water successively through process, acid-washing stainless steel line emulsion treatment system also comprises the sludge sump and plate-and-frame filter press that set gradually, sludge sump receives from air flotation pool, the sludge material that first settling tank and the second settling tank are separated, plate-and-frame filter press is by the sludge press filtration of sludge sump.This stainless steel electrolytic pickling line emulsion treatment system is economic and practical, simple to operate, can realize the emulsion qualified discharge after processing.
Description
Technical field
The present invention relates to wastewater processing technology in the rolling of rust steel steel band, specifically a kind of method of acid-washing stainless steel line emulsion treatment system and process waste emulsified mixture thereof.
Background technology
In the rolling processing of stainless steel belt, in order to protect the quality of steel strip surface, need to adopt a large amount of emulsion as metalworking coolant in production process, adopt emulsion as the metalworking coolant of the steel band rolling course of processing, emulsion recycles at mechanical processing process, recycling in process owing to being repeatedly heated, emulsion goes bad gradually, therefore need in use for some time to change, thus generation waste emulsified mixture, pollutent in waste liquid mainly petroleum-type, emulsifying agent, the organic substances such as rust-preventive agent, waste liquid is in neutral, the waste liquid outward appearance initial stage is oyster white, black is showed after time is long, band stink, Pollutant levels are very high, COD can reach tens thousand of mg/litre, therefore, multiple-stage treatment need be carried out, after reducing its Pollutant levels, progressively could remove pollution substance, finally realize qualified discharge.Environmentally protection method, Law on the Prevention and Treatment of Water Pollution, and the environmental management requirement of environmental protection competent authorities, waste emulsified mixture after treatment, should reach state three grade emissioning standard, then accesses region sewage network.Concrete discharge water quality standard value:
Summary of the invention
In view of the above, the present invention is necessary to provide a kind of acid-washing stainless steel line emulsion treatment system simple to operate, can realize the emulsion qualified discharge after processing.
The invention provides a kind of acid-washing stainless steel line emulsion treatment system, it is characterized in that: comprise the oil trap set gradually by treatment scheme, first reactive tank, air flotation pool, second reactive tank, first settling tank, oxidation pond, second settling tank, intermediate pool, mechanical filter and activated charcoal filter, for emulsifying liquid waste water successively through process, acid-washing stainless steel line emulsion treatment system also comprises the sludge sump and plate-and-frame filter press that set gradually, sludge sump receives from air flotation pool, the sludge material that first settling tank and the second settling tank are separated, plate-and-frame filter press is by the sludge press filtration of sludge sump.
Further, between described oil trap and the first reactive tank, a wastewater disposal basin is also set, makes the emulsifying liquid waste water of oil trap first flow into wastewater disposal basin and gather, then suction first reactive tank.
Further, described first reactive tank is set to three lattice, in being arranged in series.
Further, described acid-washing stainless steel line emulsion treatment system also comprises dissolving, and described dissolving connects air flotation pool.
Further, described oxidation pond is divided into four lattice settings of series connection.
Further, described second reactive tank is that two lattice be connected in series are arranged.
In addition, the present invention is necessary the treatment process providing a kind of acid-washing stainless steel line emulsion treatment system.
A treatment process for acid-washing stainless steel line emulsion treatment system, comprises the steps:
Emulsifying liquid waste water centralized collection deadens the big particle in greasy dirt drift and sedimentation waste water to oil trap, and water outlet enters the first reactive tank;
Waste water is introduced into the first lattice of the first reactive tank, adds salt simultaneously, fully mixing, then flowing into the second lattice by stirring, add flocculation agent simultaneously, be uniformly mixed, then flow into the 3rd lattice, slowly stir, and suitably add coagulant aids, make the oil droplet of precipitation produce cohesion;
Enter air flotation pool through the reacted waste water of dosing, waste water and throw out carry out solid-liquid separation in air flotation pool, and isolated clear water flows into the second reactive tank, and isolated greasy dirt regularly enters sludge sump;
Flow into the clear water of the second reactive tank, add flocculation agent and sorbent material, after being uniformly mixed, waste water enters the first settling tank, carries out mud-water separation, and supernatant liquor flows into oxidation pond, and sinking mud enters sludge sump;
The isolated clear water of first settling tank flows into oxidation pond, by adding ferrous sulfate and hydrogen peroxide, forced oxidation is carried out to the pollutent in waste water, its COD value is reduced, and medicament gradation adds, until the oxidized decomposition of pollutent, because reaction is carried out in acid condition, after reaction terminates, then suitably add alkali lye, the pH value of waste water is adjusted to neutrality;
Then flow into the second settling tank, removed by the condensation product in waste water, the second settling tank water outlet flows into intermediate pool, and the sludge material that the second settling tank is separated regularly delivers to sludge sump;
Suspended matter in waste water is removed by mechanical filter by the water of intermediate pool;
Adopt charcoal absorption process, after adsorption treatment, the extraneous water shoot of discharge of wastewater.
Wherein, four lattice of described oxidation pond add sulfuric acid, ferrous sulfate, hydrogen peroxide and sodium hydroxide successively.
Wherein, the first lattice of described second reactive tank drop into dry powder and stir, and the second lattice add flocculation agent and sorbent material after being uniformly mixed, and water outlet enters the first settling tank.
Wherein, the sewage that the sewage produced in the isolated sewage of described air flotation pool, mechanical filter filtration, activated charcoal filter 10 produce in filtering all enters wastewater disposal basin circular treatment.
Compared to prior art, acid-washing stainless steel line emulsion treatment system treatment process of the present invention is simple to operate, can fully reach environment protection emission requirement.
The preferred embodiments of the invention and beneficial effect thereof, will further describe in conjunction with embodiment.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification sheets, is used from explanation the present invention, but should not be construed as limiting the invention with embodiment one below.In the accompanying drawings,
Fig. 1 is the FB(flow block) of acid-washing stainless steel line emulsion treatment system of the present invention;
Fig. 2 is the structured flowchart of acid-washing stainless steel line emulsion treatment system of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
From the waste emulsified mixture of the cold rolling processing of Stainless Steel Band, generally there is following properties:
(1) oleaginousness is high, can up to tens thousand of mg/litre, and wherein oil in water emulsion accounts for about 15%;
(2) elaioleucite is thin, and the large portion of particle diameter, between 0.1 ~ 2 micron, is highly dispersed in water.
(3) contain large amount of organic matter in waste water, the emulsifying agent be made up of various tensio-active agent and organic corrosion inhibitor etc., oxygen-consumption is very high.
The treatment process of emulsifying agent needs to carry out tertiary treatment, and the first step is breaking milk and removing oil, and the second stage is the further purifying treatment of water quality, and the third stage is advanced treatment, makes COD index reach emission standard.
The process of first step breaking milk and removing oil, the method that breakdown of emulsion is conventional has the methods such as medical method, electrolytic process, ultrafiltration process, and wherein medical method is comparatively conventional, and cost ineffective fruit is good.
Medical method can be divided into 4 classes again usually, has salting-out process, coacervation, hybrid system and acidization etc.
Salting-out process adds salt ionogen exactly in waste water, destroys hydration shell and its double electrical layers of emulsion oil droplet, oil droplet is condensed and separates out.If the ionogen added is two, the salt such as calcium, magnesium, aluminium of trivalent, sodium, amine etc. also in replaceable promoting agent, make it the metallic soap becoming calcium, magnesium, aluminium.Effluent quality after breakdown of emulsion of saltouing is still muddy, also needs to add flocculation agent and carries out coagulation clarification.
The flocculation agent of coacervation can have: alum, polymerize aluminum chloride, activated silicic acid, polyacrylamide, ferrous sulfate and iron trichloride etc.
Namely hybrid system is the combination of salting-out process and coacervation.This method is fewer than coacervation dosage, first makes emulsification oil droplet tentatively de-steady with a small amount of salt, then adds a small amount of flocculation agent, make it agglomeration separation.
Acidization adds spent acid or eo-acid exactly in emulsifying liquid waste water, makes the fatty acid soaps in emulsion be converted into water-fast lipid acid and separate.This method is first acid by waste water furnishing, and then furnishing alkalescence.
According to above-mentioned analysis, present pre-ferred embodiments considers from economic technology, adopts hybrid system to carry out breaking milk and removing oil process to waste emulsified mixture waste water.
Second stage purifying treatment, after breaking milk and removing oil process, the COD of waste water is still higher, far do not reach emission standard requirement, need to be for further processing for this reason, biochemistry, oxidation and absorption method process can be adopted, according to wastewater flow rate quantity discharged, biochemical process not too adapts to little water yield process, and present pre-ferred embodiments adopts oxidation style to carry out purifying treatment.
Third stage advanced treatment, after above-mentioned second-stage treatment, pollutent in waste water can remove major part, but can't be up to standard, also need to carry out advanced treatment for this reason, present pre-ferred embodiments advanced treatment adopts filtration+charcoal absorption combined method, and after filtration after adsorption treatment, waste water can reach emission standard.
Specific embodiment
Refer to Fig. 1 and Fig. 2, present pre-ferred embodiments provides a kind of acid-washing stainless steel line emulsion treatment system, comprise the oil trap 1 set gradually by treatment scheme, first reactive tank 2, air flotation pool 3, second reactive tank 4, first settling tank 5, oxidation pond 6, second settling tank 7, intermediate pool 8, mechanical filter 9 and activated charcoal filter 10, for emulsifying liquid waste water successively through process, acid-washing stainless steel line emulsion treatment system also comprises the sludge sump 11 and plate-and-frame filter press 12 that set gradually, sludge sump 11 receives from air flotation pool 3, the sludge material that first settling tank 5 and the second settling tank 7 are separated, plate-and-frame filter press 12 is by the sludge press filtration of sludge sump 11.
Wherein, the first reactive tank 2 arranges three lattice, uses, also can claim third order reaction groove in series connection.
Further, in this preferred embodiment, acid-washing stainless steel line emulsion treatment system also comprises dissolving 13, and dissolving 13 connects air flotation pool 3, makes air incorporate waste water more, and the magazins' layout in liquid floats.
Further, in this preferred embodiment, a wastewater disposal basin 14 is also set between oil trap 1 and the first reactive tank 2, makes the emulsifying liquid waste water of oil trap 1 first flow into wastewater disposal basin 14 and gather, then suction first reactive tank 2.
Acid-washing stainless steel line emulsion treating processes is as follows, and the emulsifying liquid waste water centralized collection first produced by workshop deadens the big particle in greasy dirt drift and sedimentation waste water to oil trap 1, and water outlet enters wastewater disposal basin 14, waste water pump suction first reactive tank 2.Waste water is introduced into the first reactive tank 2 first lattice, add salt ionogen (as copper sulfate) simultaneously, fully mix by stirring, then flow into the second lattice, add flocculation agent (as alum) simultaneously, be uniformly mixed, flow into the 3rd lattice again, slowly stir, and suitably add coagulant aids (as polyacrylamide), make the oil droplet of precipitation produce cohesion.
Reacted waste water enters air flotation pool 3 by gravity flow, by the assistance of dissolving 13, waste water and throw out rely on fine gas bubbles to carry out solid-liquid separation in air flotation pool 3, isolated clear water flows into the second reactive tank 4, isolated sewage enters wastewater disposal basin 14 circular treatment, and isolated greasy dirt regularly enters sludge sump 11.
Flow into the clear water of the second reactive tank 4, the second reactive tank 4 is arranged for two lattice be connected in series, and the first lattice drop into dry powder and stir, and the second lattice add flocculation agent and sorbent material after being uniformly mixed, and water outlet enters the first settling tank 5.
First settling tank 5 carries out mud-water separation, and settling tank 5 is tube settler, and the supernatant liquor after separation flows into oxidation pond 6 and enters subsequent disposal, and sinking mud enters sludge sump 11, and in sludge sump 11, mud is processed by plate-and-frame filter press 12.
Oxidation pond 6 is separated to the first settling tank 5 clear water flowed into and processes, and by adding ferrous sulfate and hydrogen peroxide, carry out forced oxidation to the pollutent in waste water, its COD value is reduced, and medicament answers gradation to add, until the oxidized decomposition of pollutent.Because reaction is carried out in acid condition, after reaction terminates, then suitably add alkali lye, the pH value of waste water is adjusted to neutrality, then flow into the second settling tank 7.Particularly, four lattice that oxidation pond 6 is divided into series connection are arranged, and four lattice add sulfuric acid, ferrous sulfate, hydrogen peroxide and sodium hydroxide successively.
Second settling tank 7 is in order to remove the condensation product in waste water, and water outlet flows into intermediate pool 8, and the sludge material separated regularly delivers to sludge sump 11.
Also containing a small amount of suspended matter in intermediate pool 8, the water of intermediate pool 8 is pumped to mechanical filter 9 by pump, retains, substantially removed by the suspended matter in waste water subsequently through Van der Waals force and mechanism in mechanical filter 9.The sewage produced during mechanical filter 9 filters enters wastewater disposal basin 14.
After above-mentioned process, also have a small amount of deliquescent pollutent not to be removed in waste water, adopt the process of activated charcoal filter 10 adsorption deeply, after adsorption treatment, waste water can qualified discharge.The sewage produced during activated charcoal filter 10 filters enters wastewater disposal basin 14.
In sludge sump 11, mud is processed by plate-and-frame filter press 12.And be provided with spiral pump 15 between sludge sump 11 and plate-and-frame filter press 12, deliver to plate-and-frame filter press 12 with just sludge sump 11, the waste water of sludge sump 11 is directed into wastewater disposal basin 14.Filtrate after plate-and-frame filter press 12 press filtration can deliver to wastewater disposal basin 14 circular treatment, and dewatered sludge delivers to dewatered sludge cartage department.
In above-described embodiment, medicament comprises: sodium hydroxide, calcium chloride, polymerize aluminum chloride, wilkinite, flocculation agent, ferrous sulfate, hydrogen peroxide, sulfuric acid.When equipment layout, all devices, structures floor plan, under the prerequisite meeting processing requirement, accomplish compact construction as far as possible, consider that pipeline rout is reasonable, economical simultaneously.Whole buildings or structures are divided on the ground, underground two parts, and wherein oil trap, waste water collection tank, PH equalizing tank, sludge sump are arranged in underground; On the ground, medicine groove is arranged on steel platform the equipment layout such as water pump, air flotation pool, reactive tank.Liquid in pond is promoted by pump, then makes full use of the liquid level difference between equipment, relies on run by gravity to ensure the stability of the waterpower flowing of whole Sewage treatment systems, can reduce the energy expenditure of whole system simultaneously.
After above-mentioned process, discharge water quality can fully reach environmental protection standard value:
To sum up, emulsion treatment system of the present invention mainly includes oil trap, the first reactive tank, air flotation pool, the second reactive tank, the first settling tank, oxidation pond, the second settling tank, intermediate pool, mechanical filter, activated charcoal filter, sludge sump.First reactive tank arranges three lattice, and series connection uses, waste water pump suction reactive tank in equalizing tank, be introduced into the first lattice, add salt simultaneously, fully mixing by stirring, then flowing into the second lattice, add flocculation agent simultaneously, be uniformly mixed, then flow into the 3rd lattice, slowly stir, and suitably add coagulant aids, make the oil droplet of precipitation produce cohesion.The isolated clear water of air flotation pool flows into the second reactive tank, adds flocculation agent and sorbent material, and after being uniformly mixed, waste water enters settling tank, carries out mud-water separation.The isolated clear water of first settling tank flows into oxidation pond, by adding ferrous sulfate and hydrogen peroxide, carries out forced oxidation to the pollutent in waste water.Containing a small amount of suspended matter in second settling tank water outlet, substantially removed by the suspended matter in waste water by mechanical filter, adopt charcoal absorption advanced treatment, after adsorption treatment, waste water can qualified discharge.Emulsion treatment system is economic and practical, simple to operate, can realize the emulsion qualified discharge after processing.
As long as without prejudice to the thought of the invention, arbitrary combination is carried out to various different embodiment of the present invention, all should be considered as content disclosed by the invention; Within the scope of technical conceive of the present invention, technical scheme is carried out to the arbitrary combination of the thought without prejudice to the invention that multiple simple modification and different embodiment are carried out, all should within protection scope of the present invention.
Claims (10)
1. an acid-washing stainless steel line emulsion treatment system, it is characterized in that: comprise the oil trap (1) set gradually by treatment scheme, first reactive tank (2), air flotation pool (3), second reactive tank (4), first settling tank (5), oxidation pond (6), second settling tank (7), intermediate pool (8), mechanical filter (9) and activated charcoal filter (10), for emulsifying liquid waste water successively through process, acid-washing stainless steel line emulsion treatment system also comprises the sludge sump (11) and plate-and-frame filter press (12) that set gradually, sludge sump (11) receives from air flotation pool (3), the sludge material that first settling tank (5) and the second settling tank (7) are separated, plate-and-frame filter press (12) is by the sludge press filtration of sludge sump (11).
2. acid-washing stainless steel line emulsion treatment system according to claim 1, it is characterized in that: a wastewater disposal basin (14) is also set between described oil trap (1) and the first reactive tank (2), make the emulsifying liquid waste water of oil trap (1) first flow into wastewater disposal basin (14) to gather, then suction first reactive tank (2).
3. acid-washing stainless steel line emulsion treatment system according to claim 2, is characterized in that: described first reactive tank (2) is set to three lattice, in being arranged in series.
4. acid-washing stainless steel line emulsion treatment system according to claim 3, it is characterized in that: described acid-washing stainless steel line emulsion treatment system also comprises dissolving (13), described dissolving (13) connects air flotation pool (3).
5. acid-washing stainless steel line emulsion treatment system according to claim 4, is characterized in that: four lattice that described oxidation pond (6) is divided into series connection are arranged.
6. acid-washing stainless steel line emulsion treatment system according to claim 5, is characterized in that: the two lattice settings of described second reactive tank (4) for being connected in series.
7. a treatment process for acid-washing stainless steel line emulsion treatment system according to claim 6, is characterized in that, comprise the steps:
Emulsifying liquid waste water centralized collection deadens the big particle in greasy dirt drift and sedimentation waste water to oil trap (1), and water outlet enters the first reactive tank (2);
Waste water is introduced into the first lattice of the first reactive tank (2), add salt simultaneously, fully mix by stirring, then flow into the second lattice, add flocculation agent simultaneously, be uniformly mixed, flow into the 3rd lattice again, slowly stir, and suitably add coagulant aids, make the oil droplet of precipitation produce cohesion;
Air flotation pool (3) is entered through the reacted waste water of dosing, waste water and throw out carry out solid-liquid separation in air flotation pool (3), isolated clear water flows into the second reactive tank (4), and isolated greasy dirt regularly enters sludge sump (11);
Flow into the clear water of the second reactive tank (2), add flocculation agent and sorbent material, after being uniformly mixed, waste water enters the first settling tank (5), carry out mud-water separation, supernatant liquor flows into oxidation pond (6), and sinking mud enters sludge sump (11);
The isolated clear water of first settling tank (5) flows into oxidation pond (6), by adding ferrous sulfate and hydrogen peroxide, forced oxidation is carried out to the pollutent in waste water, its COD value is reduced, and medicament gradation adds, until the oxidized decomposition of pollutent, because reaction is carried out in acid condition, after reaction terminates, then suitably add alkali lye, the pH value of waste water is adjusted to neutrality;
Then the second settling tank (7) is flowed into, condensation product in waste water is removed, second settling tank (7) water outlet flows into intermediate pool (8), and the sludge material that the second settling tank (7) is separated regularly delivers to sludge sump (11);
Suspended matter in waste water is removed by mechanical filter (9) by the water of intermediate pool (8);
Adopt activated charcoal filter (10) adsorption treatment, after adsorption treatment, the extraneous water shoot of discharge of wastewater.
8. the treatment process of acid-washing stainless steel line emulsion treatment system according to claim 7, is characterized in that: four lattice of described oxidation pond (6) add sulfuric acid, ferrous sulfate, hydrogen peroxide and sodium hydroxide successively.
9. the treatment process of acid-washing stainless steel line emulsion treatment system according to claim 7, it is characterized in that: described second reactive tank (4) first lattice drop into dry powder and stir, second lattice add flocculation agent and sorbent material after being uniformly mixed, and water outlet enters the first settling tank (5).
10. the treatment process of acid-washing stainless steel line emulsion treatment system according to claim 7, is characterized in that: the sewage produced during the sewage produced during described air flotation pool (3) isolated sewage, mechanical filter (9) filter, activated charcoal filter (10) filter all enters wastewater disposal basin (14) circular treatment.
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| CN106630246A (en) * | 2015-11-02 | 2017-05-10 | 张家港格林台科环保设备有限公司 | Waste emulsion demulsification processing method |
| CN109399862A (en) * | 2018-11-07 | 2019-03-01 | 四川众兴汽车零部件有限公司 | A kind of industrial wastewater treatment system and its processing method |
| CN110451682A (en) * | 2019-07-31 | 2019-11-15 | 天津大学 | A kind of method that advanced oxidation handles high COD emulsification preparation waste water |
| CN111850531A (en) * | 2020-06-24 | 2020-10-30 | 肇庆宏旺金属实业有限公司 | Production method of whole roll of black titanium stainless steel |
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| CN112408714A (en) * | 2020-11-27 | 2021-02-26 | 湖南湘牛环保实业有限公司 | Stainless steel pickling wastewater treatment process |
| CN113800709A (en) * | 2020-12-14 | 2021-12-17 | 苏州碧初环境科技有限公司 | Oily waste emulsion treatment device and treatment process |
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Application publication date: 20141015 Assignee: Hunan Hongwang New Material Technology Co.,Ltd. Assignor: ZHAOQING HONGWANG METAL INDUSTRIAL Co.,Ltd. Contract record no.: X2023980044392 Denomination of invention: Emulsion treatment system and method for stainless steel pickling line Granted publication date: 20150819 License type: Common License Record date: 20231024 |