CN104098205A - Treatment system and method for stainless steel pickling line emulsion - Google Patents
Treatment system and method for stainless steel pickling line emulsion Download PDFInfo
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- CN104098205A CN104098205A CN201410351598.9A CN201410351598A CN104098205A CN 104098205 A CN104098205 A CN 104098205A CN 201410351598 A CN201410351598 A CN 201410351598A CN 104098205 A CN104098205 A CN 104098205A
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- 239000000839 emulsion Substances 0.000 title claims abstract description 45
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 34
- 239000010935 stainless steel Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000005554 pickling Methods 0.000 title abstract 5
- 239000002351 wastewater Substances 0.000 claims abstract description 63
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 239000010802 sludge Substances 0.000 claims abstract description 35
- 230000008569 process Effects 0.000 claims abstract description 25
- 230000003647 oxidation Effects 0.000 claims abstract description 23
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 23
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000000926 separation method Methods 0.000 claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- 238000004062 sedimentation Methods 0.000 claims abstract description 7
- 238000005406 washing Methods 0.000 claims description 27
- 238000005188 flotation Methods 0.000 claims description 20
- 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
- 230000001804 emulsifying effect Effects 0.000 claims description 10
- 239000010808 liquid waste Substances 0.000 claims description 10
- 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
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 150000003839 salts Chemical class 0.000 claims description 7
- 238000001179 sorption measurement Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 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
- 230000002378 acidificating effect Effects 0.000 claims description 3
- 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
- 239000006228 supernatant Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 238000005868 electrolysis reaction 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
- 230000007613 environmental effect Effects 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
- 239000002253 acid Substances 0.000 description 3
- 239000003610 charcoal Substances 0.000 description 3
- 239000003995 emulsifying agent Substances 0.000 description 3
- 238000005516 engineering process Methods 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
- 231100000719 pollutant Toxicity 0.000 description 2
- 229920002401 polyacrylamide Polymers 0.000 description 2
- 239000000344 soap 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
- 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
- 238000007667 floating Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000012535 impurity Substances 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
- 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
- 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 treatment system for a stainless steel pickling line emulsion. The treatment system for the stainless steel pickling line emulsion comprises an oil separation tank, a first reaction tank, an air floatation tank, a second reaction tank, a first sedimentation tank, an oxidation tank, a second sedimentation tank, a middle water tank, a mechanical filter and an active carbon filter which are sequentially arranged according to the treatment processes and are used for allowing the wastewater of the emulsion to be sequentially treated; the treatment system for the stainless steel pickling line emulsion further comprises a sludge tank and a plate-and-frame filter press which are sequentially arranged; the sludge tank receives the sludge substances which are separated from the air floatation tank, the first sedimentation tank and the second sedimentation tank; the plate-and- frame filter press conducts filter pressing on the sludge in the sludge tank. The treatment system for the stainless steel electrolysis pickling line, provided by the invention, is economical, applicable and simple to operate; that the treated emulsion meets discharge standards is realized.
Description
Technical field
The wastewater processing technology in the rolling of steel steel band that the present invention relates to become rusty, specifically a kind of acid-washing stainless steel line emulsion treatment system and process the method for waste emulsified mixture.
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 emulsions as metalworking coolant in production process, adopt the metalworking coolant of emulsion as the steel band rolling course of processing, emulsion recycles at mechanical processing process, recycling in process owing to being repeatedly heated, emulsion is rotten gradually, therefore need in use for some time to change, thereby generation waste emulsified mixture, pollutent in waste liquid is mainly petroleum-type, emulsifying agent, the organic substances such as rust-preventive agent, it is neutral that waste liquid is, the waste liquid outward appearance initial stage is oyster white, after time is long, show black, band stink, Pollutant levels are very high, COD can reach tens thousand of mg/litre, therefore, need carry out multiple-stage treatment, reduce after its Pollutant levels, could progressively remove pollution substance, finally realize qualified discharge.According to Law on Environmental Protection, 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 emulsion qualified discharge after treatment.
The invention provides a kind of acid-washing stainless steel line emulsion treatment system, it is characterized in that: comprise the oil trap setting gradually by treatment scheme, 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 and activated charcoal filter, process for emulsifying liquid waste water successively process, acid-washing stainless steel line emulsion treatment system also comprises the sludge sump and the plate-and-frame filter press that set gradually, sludge sump receives from air flotation pool, the mud material that the 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 the first reactive tank.
Further, described the first reactive tank is set to three lattice, is series connection setting.
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 the second reactive tank is the two lattice settings that are connected in series.
In addition, the present invention is necessary to provide a kind for the treatment of process 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 mixes by stirring, then flows 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 separating out 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 the first settling tank flows into oxidation pond, by adding ferrous sulfate and hydrogen peroxide, pollutent in waste water is carried out to forced oxidation, its COD value is reduced, and medicament gradation adds, until the oxidized decomposition of pollutent, because reaction is carried out under acidic conditions, after reaction finishes, suitably add alkali lye, the pH value of waste water is adjusted to neutrality;
Then flow into the second settling tank, the condensation product in waste water is removed, the second settling tank water outlet flows into intermediate pool, and the mud material that the second settling tank is separated is regularly delivered to sludge sump;
The water of intermediate pool is removed the suspended matter in waste water by mechanical filter;
Adopt charcoal absorption processing, 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 the 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 isolated sewage of described air flotation pool, mechanical filter produce in filtering, the sewage that activated charcoal filter 10 produces in filtering all enter 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, further describe in connection with embodiment.
Brief description of the drawings
Accompanying drawing is to be 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 elaborated.Should be understood that, embodiment described herein only, for description and interpretation 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 be up to tens thousand of mg/litre, and wherein oil in water emulsion accounts for 15% left and right;
(2) elaioleucite is thin, and the large portion of particle diameter is between 0.1～2 micron, and high dispersing is in water.
(3) in waste water, contain large amount of organic matter, the emulsifying agent and the organic corrosion inhibitor etc. that are formed by various tensio-active agents, oxygen-consumption is very high.
The treatment process of emulsifying agent need to be carried 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 processing 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 is low effective.
Medical method can be divided into again 4 classes conventionally, has salting-out process, coacervation, hybrid system and acidization etc.
Salting-out process adds salt ionogen exactly in waste water, the hydration shell that destroys emulsion oil droplet with and double electrical layers, oil droplet cohesion is separated out.If salts such as the ionogen adding is two, the calcium of trivalent, magnesium, aluminium, also sodium, the amine etc. in replaceable promoting agent, makes it to become the metallic soap of calcium, magnesium, aluminium.The effluent quality of saltouing after breakdown of emulsion 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.
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, makes 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 by waste water furnishing acidity, and then furnishing alkalescence.
According to above-mentioned analysis, preferred embodiment of the present invention considers from economic technology, adopts hybrid system to carry out breaking milk and removing oil processing to waste emulsified mixture waste water.
Second stage purifying treatment, after breaking milk and removing oil is processed, the COD of waste water is still higher, far do not reach emission standard requirement, need to be for further processing for this reason, can adopt biochemistry, oxidation and absorption method processing, according to wastewater flow rate quantity discharged, biochemical process not too adapts to little water yield processing, and preferred embodiment of the present invention adopts oxidation style to carry out purifying treatment.
Third stage advanced treatment, after above-mentioned second-stage treatment, pollutent in waste water can be removed major part, but can't be up to standard, also need to carry out advanced treatment for this reason, preferred embodiment advanced treatment of the present invention adopts filtration+charcoal absorption combined method, and after adsorption treatment, waste water can reach emission standard after filtration.
Specific embodiment
Refer to Fig. 1 and Fig. 2, preferred embodiment of the present invention provides a kind of acid-washing stainless steel line emulsion treatment system, comprise the oil trap 1 setting gradually by treatment scheme, the first reactive tank 2, air flotation pool 3, the second reactive tank 4, the first settling tank 5, oxidation pond 6, the second settling tank 7, intermediate pool 8, mechanical filter 9 and activated charcoal filter 10, process for emulsifying liquid waste water successively process, acid-washing stainless steel line emulsion treatment system also comprises the sludge sump 11 and the plate-and-frame filter press 12 that set gradually, sludge sump 11 receives from air flotation pool 3, the mud material that the 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, is series connection and uses, and also can claim third order reaction groove.
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 more waste water, and the impurity in liquid separates floating.
Further, in this preferred embodiment, between oil trap 1 and the first reactive tank 2, a wastewater disposal basin 14 is also set, makes the emulsifying liquid waste water of oil trap 1 first flow into wastewater disposal basin 14 and gather, then suction the first reactive tank 2.
Acid-washing stainless steel line emulsion treating processes is as follows, and the emulsifying liquid waste water centralized collection first being 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, pump suction the first reactive tank 2 for waste water.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 again the 3rd lattice, slowly stir, and suitably add coagulant aids (as polyacrylamide), make the oil droplet of separating out produce cohesion.
Reacted waste water enters air flotation pool 3 by gravity flow, by the assistance of dissolving 13, waste water and throw out carry out solid-liquid separation at the trickle bubble of the interior dependence of 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 two lattice settings of the second reactive tank 4 for being connected in series, 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.
The 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 the interior mud of sludge sump 11 is processed by plate-and-frame filter press 12.
Oxidation pond 6 separates to the first settling tank 5 clear water flowing into and processes, and by adding ferrous sulfate and hydrogen peroxide, the pollutent in waste water is carried out to forced oxidation, and its COD value is reduced, and medicament answers gradation to add, until the oxidized decomposition of pollutent.Because reaction is carried out under acidic conditions, after reaction finishes, suitably add alkali lye, the pH value of waste water is adjusted to neutrality, then flow into the second settling tank 7.Particularly, oxidation pond 6 is divided into four lattice settings of series connection, and four lattice add sulfuric acid, ferrous sulfate, hydrogen peroxide and sodium hydroxide successively.
The 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 mud material of separating is regularly delivered to sludge sump 11.
In intermediate pool 8, also contain a small amount of suspended matter, the water of intermediate pool 8 is pumped to mechanical filter 9 by pump, follow-uply holds back by Van der Waals force and mechanism in mechanical filter 9, and the suspended matter in waste water is removed substantially.The sewage producing during mechanical filter 9 filters enters wastewater disposal basin 14.
After above-mentioned processing, in waste water, also have a small amount of deliquescent pollutent not to be removed, adopt activated charcoal filter 10 adsorption deeply processing, after adsorption treatment, waste water can qualified discharge.The sewage producing during activated charcoal filter 10 filters enters wastewater disposal basin 14.
The interior mud of sludge sump 11 is processed by plate-and-frame filter press 12.And between sludge sump 11 and plate-and-frame filter press 12, be provided with spiral pump 15, deliver to plate-and-frame filter press 12 with sludge sump 11 just, the waste water of sludge sump 11 is directed into wastewater disposal basin 14.Filtrate after plate-and-frame filter press 12 press filtrations can be delivered to wastewater disposal basin 14 circular treatment, and dewatered sludge is delivered 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.In the time of equipment layout, all devices, structures floor plan, under the prerequisite that meets processing requirement, are accomplished 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 promotes by pump, then makes full use of the liquid level difference between equipment, relies on run by gravity to ensure the mobile stability of waterpower of whole Sewage treatment systems, and the while can be reduced the energy expenditure of whole system.
After above-mentioned processing, 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.The first reactive tank arranges three lattice, and series connection is used, pump suction reactive tank for waste water in equalizing tank, be introduced into the first lattice, add salt simultaneously, fully mix by stirring, then flow 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 separating out 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 the first settling tank flows into oxidation pond, by adding ferrous sulfate and hydrogen peroxide, the pollutent in waste water is carried out to forced oxidation.In the second settling tank water outlet, contain a small amount of suspended matter, by mechanical filter, the suspended matter in waste water is removed substantially, 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 emulsion qualified discharge after treatment.
As long as without prejudice to the thought of the invention, various different embodiment of the present invention are carried out to arbitrary combination, 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 carry out, all should be 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) setting gradually by treatment scheme, the first reactive tank (2), air flotation pool (3), the second reactive tank (4), the first settling tank (5), oxidation pond (6), the second settling tank (7), intermediate pool (8), mechanical filter (9) and activated charcoal filter (10), process for emulsifying liquid waste water successively process, acid-washing stainless steel line emulsion treatment system also comprises the sludge sump (11) and the plate-and-frame filter press (12) that set gradually, sludge sump (11) receives from air flotation pool (3), the mud material that the 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: between described oil trap (1) and the first reactive tank (2), a wastewater disposal basin (14) is also set, make the emulsifying liquid waste water of oil trap (1) first flow into wastewater disposal basin (14) and gather, then suction the first reactive tank (2).
3. acid-washing stainless steel line emulsion treatment system according to claim 2, is characterized in that: described the first reactive tank (2) is set to three lattice, is series connection setting.
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: described oxidation pond (6) is divided into four lattice settings of series connection.
6. acid-washing stainless steel line emulsion treatment system according to claim 5, is characterized in that: the two lattice settings of described the second reactive tank (4) for being connected in series.
7. a treatment process for acid-washing stainless steel line emulsion treatment system claimed in claim 6, is characterized in that, comprises 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 again the 3rd lattice, slowly stir, and suitably add coagulant aids, make the oil droplet of separating out produce cohesion;
Enter air flotation pool (3) 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 the first settling tank (5) flows into oxidation pond (6), by adding ferrous sulfate and hydrogen peroxide, pollutent in waste water is carried out to forced oxidation, its COD value is reduced, and medicament gradation adds, until the oxidized decomposition of pollutent, because reaction is carried out under acidic conditions, after reaction finishes, suitably add alkali lye, the pH value of waste water is adjusted to neutrality;
Then flow into the second settling tank (7), condensation product in waste water is removed, the second settling tank (7) water outlet flows into intermediate pool (8), and the mud material that the second settling tank (7) is separated is regularly delivered to sludge sump (11);
The water of intermediate pool (8) is removed the suspended matter in waste water by mechanical filter (9);
Adopt gac (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 the second reactive tank (4) first lattice drop into dry powder and stir, the 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 producing during sewage, the activated charcoal filter (10) producing during the isolated sewage of described air flotation pool (3), mechanical filter (9) filter filters all enters wastewater disposal basin (14) circular treatment.
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