CN203768463U - Stainless steel acid-washing system with nitric acid-free acid-washing liquid - Google Patents
Stainless steel acid-washing system with nitric acid-free acid-washing liquid Download PDFInfo
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- CN203768463U CN203768463U CN201420119725.8U CN201420119725U CN203768463U CN 203768463 U CN203768463 U CN 203768463U CN 201420119725 U CN201420119725 U CN 201420119725U CN 203768463 U CN203768463 U CN 203768463U
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- 238000005406 washing Methods 0.000 title claims abstract description 30
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 26
- 239000010935 stainless steel Substances 0.000 title claims abstract description 26
- 239000007788 liquid Substances 0.000 title claims abstract description 19
- 239000002253 acid Substances 0.000 claims abstract description 97
- 238000002156 mixing Methods 0.000 claims abstract description 38
- 238000001914 filtration Methods 0.000 claims abstract description 29
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 25
- 238000005273 aeration Methods 0.000 claims abstract description 16
- 150000002500 ions Chemical class 0.000 claims abstract description 13
- 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 abstract description 12
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims abstract description 12
- 238000005554 pickling Methods 0.000 claims description 40
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 36
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 36
- 239000004571 lime Substances 0.000 claims description 36
- 235000021110 pickles Nutrition 0.000 claims description 35
- -1 polyethylene Polymers 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 13
- 230000005484 gravity Effects 0.000 claims description 11
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims description 9
- 239000004698 Polyethylene Substances 0.000 claims description 6
- 239000004743 Polypropylene Substances 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 6
- 229920000573 polyethylene Polymers 0.000 claims description 6
- 229920001155 polypropylene Polymers 0.000 claims description 6
- 239000004800 polyvinyl chloride Substances 0.000 claims description 6
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 6
- 238000005374 membrane filtration Methods 0.000 claims description 3
- 238000001471 micro-filtration Methods 0.000 claims description 3
- 238000005215 recombination Methods 0.000 claims description 3
- 230000006798 recombination Effects 0.000 claims description 3
- 238000000108 ultra-filtration Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 abstract description 18
- 230000007613 environmental effect Effects 0.000 abstract description 6
- 239000002351 wastewater Substances 0.000 abstract description 6
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 abstract description 4
- 230000033116 oxidation-reduction process Effects 0.000 abstract 1
- 239000000779 smoke Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- 238000000034 method Methods 0.000 description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 239000003814 drug Substances 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 241000208125 Nicotiana Species 0.000 description 3
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000012851 eutrophication Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- RPAJSBKBKSSMLJ-DFWYDOINSA-N (2s)-2-aminopentanedioic acid;hydrochloride Chemical class Cl.OC(=O)[C@@H](N)CCC(O)=O RPAJSBKBKSSMLJ-DFWYDOINSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 230000028016 temperature homeostasis Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000003403 water pollutant Substances 0.000 description 1
Landscapes
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The utility model discloses a stainless steel acid-washing system with nitric acid-free acid-washing liquid. The system comprises an acid liquid conveying pipe, a ferric sulfate conveying pipe, a steam conveying pipe, an acid liquid circulation conveying pipe, an acid liquid circulation pump, a freezer, a filtering device and an air dissolving pump; a system body comprises an acid-washing tank, a microporous aeration head, an oblique overflow plate, a filter net, a first mixing region, a second mixing region, an oxidation reduction electrode, an F ion electrode, an acidimeter and a hydrometer. According to the system, the automation level of an acid-washing process can be remarkably increased, the labor intensity can be reduced, the acid-washing efficiency can be improved, the cleaning cycle can be shortened, the chemical consumption can be reduced, and the operating cost is greatly reduced; as the acid-washing liquid does not contain nitric acid, a series of environmental problems of yellow smoke in workshops, nitrogen-containing wastewater and the like are radically solved; the acid-washing liquid is quickly mixed and heated in a closed circulation system; the stainless steel acid-washing system has acid liquid replenishing and cleaning functions and is efficient, clean and energy-saving.
Description
Technical field
The utility model relates to a kind of acid-washing stainless steel system that does not contain nitric acid.
Background technology
When stainless steel becomes various sheet material and section bar from hot rolling of steel billet, surface can be by airborne O
2oxidation, the tight zone of oxidation of generation black, yellow, in order to improve stainless outward appearance and solidity to corrosion, the stainless steel after processing must carry out cleanup acid treatment.Conventionally adopt nitration mixture (HNO
3+ HF) acid cleaning process is removed the iron scale on top layer.For improving pickling speed, the acid concentration of acid solution conventionally can be higher, can heat to it simultaneously.There is violent chemical reaction in metal and metal oxide and high temperature strong acid pickling liquid, produces a large amount of H
2and NO
xdeng sour gas, gas carries and produces a large amount of acid aerosol state pollutents in rising volatilization process, is acid mist.Conventionally use acid fog inhibitor to form fine and close foam layer at pickle solution liquid level layer, suppress the effusion of acid mist, greatly reduce NO
xwith the instantaneous concentration of NO, yet when steel pipe hangs in or hangs out, still can cause the violent disturbance of pickle solution, make the foam layer generation tobacco that breaks, while hanging out in addition, the self-contained acid solution volatilization of steel pipe makes instantaneous concentration still higher.If do not take effective treatment measures, operator is caused to actual bodily harm, workshop appliance is caused to serious corrosion simultaneously.In addition, acid mist directly outer row also can produce serious chimney " Huanglong " phenomenon, will the healthy of surrounding environment, the people and other animals and plants be produced to serious harm.
In addition, owing to using nitric acid as pickle solution, make also can produce the pickling waste waters that contains a large amount of nitrate ions in acid cleaning process, wherein total nitrogen concentration is very high, can not meet more and more stricter environmental emission requirement.It is the difficult point of environmental area that denitrogenation of waste water is processed always, also will spend a large amount of processing cost nitrogenous effluents simultaneously.General is at present to transforming in the form of nitrogen in the process that sewage is processed, really nitrogen is not removed from environment, the excessive existence of different shape nitrogen pollutant is all the direct factor that causes body eutrophication, therefore fails thoroughly to solve body eutrophication problem.National environmental protection portion successively announced 13 discharging standards that contain the special emission limit of water pollutant such as pulping and paper-making, pharmacy in 2008, for different industries, had formulated stricter nitrogen pollutant emission standard.In these standards, except ammonia nitrogen, all set the control index of total nitrogen.Therefore, take nitric acid has been subject to serious challenge as pickle solution main component.
Summary of the invention
The purpose of this utility model is to overcome existing acid cleaning process acid solution to contain nitric acid, and impurity is difficult to high efficiency separation, and the low deficiency that waits of level of automation, provides a kind of pickle solution not contain the acid-washing stainless steel system of nitric acid.
Pickle solution does not comprise acid solution transfer lime, ferric sulfate transfer lime, steam pipeline, acid cycle transfer lime, acid cycle pump, refrigerator, filtration unit, air dissolved pump containing the acid-washing stainless steel system of nitric acid, and system ontology comprises pickling tank, micro porous aeration head, overflow swash plate, filtering net, the first mixing zone, the second mixing zone, redox electrode, F ion electrode, acidometer and specific gravity hydrometer, in system ontology, be provided with in turn the first mixing zone, pickling tank, overflow swash plate, the second mixing zone, in the first mixing zone, middle part is laterally provided with filtering net, in the second mixing zone, be provided with micro porous aeration head, the first upper end, mixing zone is provided with acid solution transfer lime, ferric sulfate transfer lime and steam pipeline, the first filtering net below, mixing zone is provided with steam pipeline, the first filtering net top, mixing zone is connected with the second middle part, mixing zone through acid cycle pump, in pickling tank, be provided with redox electrode, F ion electrode, acidometer and specific gravity hydrometer, acid cycle pump, refrigerator, filtration unit, air dissolved pump is connected in turn by acid cycle transfer lime, acid cycle transfer lime is connected with micro porous aeration head.
The impeller material of described acid cycle pump is surface recombination tetrafluoroethylene, and the flow of acid cycle pump is 0.1 ~ 5 times of pickling tank volume.
The material of described pickling tank is the plastic plate of polyethylene, polypropylene or reinforced polyvinyl chloride.
Described filtration unit adopts microfiltration membrane or ultra-filtration membrane.
Described air dissolved pump is Self-sucking gas/liquid mixing pump.
The material of described micro porous aeration head is the plastics of polyethylene, polypropylene, reinforced polyvinyl chloride or tetrafluoroethylene, and micropore size is at 0.01～0.5mm.
The gradient of described overflow swash plate becomes 20～60 with liquid level
o.
The material of described filtering net is tetrafluoroethylene, and average mesh is 10～100 orders.
Described redox electrode is the electrode of resistance to strong acid type, and F ion electrode is the electrode of resistance to strong acid type, and acidity is counted the electrode of resistance to strong acid type, and proportion is counted resistance to strong acid type.
, containing the acid washing process for stainless steel of nitric acid, can effectively not solve above-mentioned weak point, be characterized in H
2sO
4with HF be mixing acid system, and the auxiliary H that utilizes
2o
2strong oxidizing property.Just timing adds a small amount of Fe
3+, rely on Fe
3+oxidisability bring out H
2sO
4produce a large amount of OH living radicals, make it to react with oxide skin, simultaneously by the activation of HF, make acid solution see through the crack of oxide skin, enter the poor chromium layer the most easily reacting under oxide skin, and produce a large amount of H
2, by the effect of peeling off of hydrogen, oxide skin is torn and is come off.Along with the carrying out of acid cleaning process, Fe in pickle solution
3+concentration can raise gradually, regularly, by circulation and the frozen cooling technique of pickle solution, makes impurity F e
3+with Fe
2(SO
4)
3removal is separated out and filtered to crystalline form.Meanwhile, the effective constituents such as acid and hydrogen peroxide can constantly consume, and need regular replenishment.If the main component in pickle solution is carried out to Real-Time Monitoring, realize automatically supplementing of medicament, level of automation, minimizing labour intensity, the raising pickling efficiency that can greatly improve like this acid cleaning process, can reduce cleaning cycle simultaneously, save medicament usage quantity, greatly save running cost.
The utility model can significantly improve level of automation, minimizing labour intensity, the raising pickling efficiency of acid cleaning process, can reduce cleaning cycle simultaneously, saves medicament usage quantity, greatly save running cost.Because pickle solution is containing nitric acid, thoroughly solve Pickling-shop and emitted tobacco, and the series of environmental problems such as waste water is nitrogenous, greatly improved production environment.Pickle solution completes short mix and heats in closed cycle system, possesses acid solution supply and cleaning function simultaneously, is a kind of efficient, clean and energy-conservation acid-washing stainless steel system.
accompanying drawing explanation:
Fig. 1 is that pickle solution does not contain the acid-washing stainless steel system architecture schematic diagram of nitric acid;
In figure, pickling tank 1, acid solution transfer lime 2, ferric sulfate transfer lime 3, steam pipeline 4, acid cycle transfer lime 5, acid cycle pump 6, refrigerator 7, filtration unit 8, air dissolved pump 9, micro porous aeration head 10, overflow swash plate 11, filtering net 12, the first mixing zone 13, the second mixing zone 14, redox electrode 15, F ion electrode 16, acidometer 17 and specific gravity hydrometer 18.
Embodiment
Pickle solution is not in pickling tank, to add in advance tap water containing the acid washing process for stainless steel of nitric acid, opens the valve of acid solution transfer lime, ferric sulfate transfer lime and steam pipeline, and the acid solution in acid solution transfer lime is H
2sO
4, HF and H
2o
2, according to pickling tank liquid level, control the dosage of acid solution, and open acid cycle pump and air dissolved pump simultaneously, by acid cycle pump, make acid solution, steam and H
2o
2in pipeline, mix rapidly and be rapidly heated, the gas that air dissolved pump dissolves in simultaneously discharges in pickling tank by micro porous aeration head and produces a large amount of microbubbles, needed oxygen in pickling reaction process is provided, and the horizontal thrust by overflow swash plate makes the microbubble in pickle solution be full of whole pickling tank.By pickle solution effective constituent concentration in redox electrode, F ion electrode, acidometer and specific gravity hydrometer Real-Time Monitoring pickling tank, make redox potential value >250 mV, acid concentration >5%, if observed value lower than set(ting)value, is opened acid solution transfer lime transport of H respectively automatically
2o
2and HF, measure metal concentration, if Fe simultaneously
3+concentration surpasses 150 g/L, carries out the clean of pickle solution after pickling EO, closes acid solution transfer lime, ferric sulfate transfer lime, steam pipeline, opens refrigerator and filtration unit, removes metallic impurity.
Pickle solution completes short mix and heats in closed cycle system, possesses acid solution supply and cleaning function simultaneously.This technique greatly improved acid cleaning process level of automation, reduced labour intensity, improved pickling efficiency, can reduce cleaning cycle simultaneously, save medicament usage quantity, greatly save running cost.Because pickle solution is containing nitric acid, thoroughly solve Pickling-shop and emitted tobacco, and the series of environmental problems such as waste water is nitrogenous, greatly improved production environment.Pickle solution completes short mix and heats in closed cycle system, possesses acid solution supply and cleaning function simultaneously, is a kind of efficient, clean and energy-conservation acid washing process for stainless steel.
As shown in Figure 1, pickle solution does not comprise acid solution transfer lime 2, ferric sulfate transfer lime 3, steam pipeline 4, acid cycle transfer lime 5, acid cycle pump 6, refrigerator 7, filtration unit 8, air dissolved pump 9 containing the acid-washing stainless steel system of nitric acid, and system ontology comprises pickling tank 1, micro porous aeration head 10, overflow swash plate 11, filtering net 12, the first mixing zone 13, the second mixing zone 14, redox electrode 15, F ion electrode 16, acidometer 17 and specific gravity hydrometer 18, in system ontology, be provided with in turn the first mixing zone 13, pickling tank 1, overflow swash plate 11, the second mixing zone 14, the first interior middle part, mixing zone 13 is laterally provided with filtering net 12, in the second mixing zone 14, be provided with micro porous aeration head 10, the first 13 upper ends, mixing zone is provided with acid solution transfer lime 2, ferric sulfate transfer lime 3 and steam pipeline 4, the first 13 filtering net 12 belows, mixing zone is provided with steam pipeline 4, the first 13 filtering net 12 tops, mixing zone is connected with 14 middle parts, the second mixing zone through acid cycle pump 6, in pickling tank 1, be provided with redox electrode 15, F ion electrode 16, acidometer 17 and specific gravity hydrometer 18, acid cycle pump 6, refrigerator 7, filtration unit 8, air dissolved pump 9 is connected in turn by acid cycle transfer lime 5, acid cycle transfer lime 5 is connected with micro porous aeration head 10.
The impeller material of described acid cycle pump 6 is surface recombination tetrafluoroethylene, and the flow of acid cycle pump 6 is 0.1 ~ 5 times of pickling tank 1 volume.
The material of described pickling tank 1 is the plastic plate of polyethylene, polypropylene or reinforced polyvinyl chloride.
Described filtration unit 8 adopts microfiltration membrane or ultra-filtration membrane.
Described air dissolved pump 9 is Self-sucking gas/liquid mixing pump.
The material of described micro porous aeration head 10 is the plastics of polyethylene, polypropylene, reinforced polyvinyl chloride or tetrafluoroethylene, and micropore size is at 0.01～0.5mm.
The gradient of described overflow swash plate 11 becomes 20～60 with liquid level
o.
The material of described filtering net 12 is tetrafluoroethylene, and average mesh is 10～100 orders.
Described redox electrode 15 is the electrode of resistance to strong acid type, and F ion electrode 16 is the electrode of resistance to strong acid type, and acidometer 17 is the electrode of resistance to strong acid type, and specific gravity hydrometer 18 is resistance to strong acid type.
Pickle solution, containing the acid washing process for stainless steel of nitric acid, does not add in advance tap water in pickling tank 1, opens the valve of acid solution transfer lime 2, ferric sulfate transfer lime 3 and steam pipeline 4, and the acid solution in acid solution transfer lime 2 is H
2sO
4, HF and H
2o
2, according to pickling tank 1 liquid level, to control the dosage of acid solution, and open acid cycle pump 6 and air dissolved pump 9 simultaneously, it is 1～5 m that air dissolved pump 9 provides tolerance scope
3/ m
3.h, by acid cycle pump 6, make acid solution, steam and H
2o
2in pipeline, mix rapidly and be rapidly heated, the gas that air dissolved pump 9 dissolves in simultaneously produces a large amount of microbubbles by micro porous aeration head 7 in the interior release of pickling tank 1, needed oxygen in pickling reaction process is provided, and the horizontal thrust by overflow swash plate 11 makes the microbubble in pickle solution be full of whole pickling tank 1; By pickle solution effective constituent concentration in redox electrode 15, F ion electrode 16, acidometer 17 and specific gravity hydrometer 18 Real-Time Monitoring pickling tanks 1, make redox potential value >250 mV, acid concentration >5%, if observed value lower than set(ting)value, is opened acid solution transfer lime 2 transport of H respectively automatically
2o
2and HF, measure metal concentration, if Fe simultaneously
3+concentration surpasses 150 g/L, carries out the clean of pickle solution after pickling EO, closes acid solution transfer lime 2, ferric sulfate transfer lime 3, steam pipeline 4, opens refrigerator 7 and filtration unit 8, and refrigerator 7 thermoregulation ranges are-30～-5
oc, removes metallic impurity.
From experimental result, can find out, pickle solution improves more than 100% pickling efficiency containing the acid cleaning process of nitric acid, after pickling, takes out stainless steel tube, and its surface cleaning is clean, and can form the sub-light of silvery white.In specific implementation process, measured the NO apart from pickling tank liquid level 20cm and 100cm
xthe total nitrogen concentration of concentration and flushing waste water, result demonstration is and detects.Pickling tank cleaning cycle, from about an original week, extends to about 6 months.
Claims (9)
1. a pickle solution does not contain the acid-washing stainless steel system of nitric acid, it is characterized in that comprising acid solution transfer lime (2), ferric sulfate transfer lime (3), steam pipeline (4), acid cycle transfer lime (5), acid cycle pump (6), refrigerator (7), filtration unit (8), air dissolved pump (9), system ontology comprises pickling tank (1), micro porous aeration head (10), overflow swash plate (11), filtering net (12), the first mixing zone (13), the second mixing zone (14), redox electrode (15), F ion electrode (16), acidometer (17) and specific gravity hydrometer (18), in system ontology, be provided with in turn the first mixing zone (13), pickling tank (1), overflow swash plate (11), the second mixing zone (14), in the first mixing zone (13), middle part is laterally provided with filtering net (12), in the second mixing zone (14), be provided with micro porous aeration head (10), upper end, the first mixing zone (13) is provided with acid solution transfer lime (2), ferric sulfate transfer lime (3) and steam pipeline (4), the first mixing zone (13) filtering net (12) below is provided with steam pipeline (4), the first mixing zone (13) filtering net (12) top is connected with the second mixing zone (14) middle part through acid cycle pump (6), in pickling tank (1), be provided with redox electrode (15), F ion electrode (16), acidometer (17) and specific gravity hydrometer (18), acid cycle pump (6), refrigerator (7), filtration unit (8), air dissolved pump (9) is connected in turn by acid cycle transfer lime (5), acid cycle transfer lime (5) is connected with micro porous aeration head (10).
2. a kind of pickle solution according to claim 1 does not contain the acid-washing stainless steel system of nitric acid, the impeller material that it is characterized in that described acid cycle pump (6) is surface recombination tetrafluoroethylene, and the flow of acid cycle pump (6) is 0.1 ~ 5 times of pickling tank (1) volume.
3. a kind of pickle solution according to claim 1, not containing the acid-washing stainless steel system of nitric acid, is characterized in that the material of described pickling tank (1) is the plastic plate of polyethylene, polypropylene or reinforced polyvinyl chloride.
4. a kind of pickle solution according to claim 1, not containing the acid-washing stainless steel system of nitric acid, is characterized in that described filtration unit (8) adopts microfiltration membrane or ultra-filtration membrane.
5. a kind of pickle solution according to claim 1, not containing the acid-washing stainless steel system of nitric acid, is characterized in that described air dissolved pump (9) is Self-sucking gas/liquid mixing pump.
6. a kind of pickle solution according to claim 1 does not contain the acid-washing stainless steel system of nitric acid, the material that it is characterized in that described micro porous aeration head (10) is the plastics of polyethylene, polypropylene, reinforced polyvinyl chloride or tetrafluoroethylene, and micropore size is at 0.01～0.5mm.
7. a kind of pickle solution according to claim 1, not containing the acid-washing stainless steel system of nitric acid, is characterized in that the gradient of described overflow swash plate (11) becomes 20～60 with liquid level
o.
8. a kind of pickle solution according to claim 1, not containing the acid-washing stainless steel system of nitric acid, is characterized in that the material of described filtering net (12) is tetrafluoroethylene, and average mesh is 10～100 orders.
9. a kind of pickle solution according to claim 1 does not contain the acid-washing stainless steel system of nitric acid, it is characterized in that described redox electrode (15) is for the electrode of resistance to strong acid type, F ion electrode (16) is the electrode of resistance to strong acid type, acidometer (17) is the electrode of resistance to strong acid type, and specific gravity hydrometer (18) is resistance to strong acid type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420119725.8U CN203768463U (en) | 2014-03-18 | 2014-03-18 | Stainless steel acid-washing system with nitric acid-free acid-washing liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420119725.8U CN203768463U (en) | 2014-03-18 | 2014-03-18 | Stainless steel acid-washing system with nitric acid-free acid-washing liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203768463U true CN203768463U (en) | 2014-08-13 |
Family
ID=51285673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420119725.8U Expired - Fee Related CN203768463U (en) | 2014-03-18 | 2014-03-18 | Stainless steel acid-washing system with nitric acid-free acid-washing liquid |
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| Country | Link |
|---|---|
| CN (1) | CN203768463U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103882462A (en) * | 2014-03-18 | 2014-06-25 | 浙江大学 | Stainless steel pickling system and method adopting pickling solution without nitric acid |
-
2014
- 2014-03-18 CN CN201420119725.8U patent/CN203768463U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103882462A (en) * | 2014-03-18 | 2014-06-25 | 浙江大学 | Stainless steel pickling system and method adopting pickling solution without nitric acid |
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