CN205839139U - Acid washing liquid for stainless steel organization of supply and stainless steel strip acid dip pickle - Google Patents
Acid washing liquid for stainless steel organization of supply and stainless steel strip acid dip pickle Download PDFInfo
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- CN205839139U CN205839139U CN201620496594.4U CN201620496594U CN205839139U CN 205839139 U CN205839139 U CN 205839139U CN 201620496594 U CN201620496594 U CN 201620496594U CN 205839139 U CN205839139 U CN 205839139U
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- acid
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- acid solution
- dispensing
- pickle
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Abstract
This utility model relates to a kind of acid washing liquid for stainless steel organization of supply, and including acid solution supply line, acid solution supply line connects has pickle to prepare structure, and pickle preparation structure includes concentrated sulphuric acid dispensing pipe, sparge pipe, hexafluosilicic acid dispensing pipe and hydrogen peroxide dispensing pipeline.Additionally relating to a kind of stainless steel strip acid dip pickle, including descaling bath, be provided with the spraying and blowing organ for spraying pickle in descaling bath, spraying and blowing organ connects acid washing liquid for stainless steel organization of supply as above.The present embodiment uses concentrated sulphuric acid, hexafluosilicic acid, hydrogen peroxide and industry water to be configured to mixed acid washing liquid, supply is to pickling section nozzle, stainless steel strip pickling requirement can be met, realize stainless steel strip without nitric acid acidwashing, produce nitrogen oxides and the nitrogenous effluent of high pollution when avoiding using the nitration mixture pickling containing nitric acid, thus alleviate environmental pollution.
Description
Technical field
This utility model belongs to acid-washing stainless steel technical field, is specifically related to a kind of acid washing liquid for stainless steel organization of supply and joins
It is equipped with the stainless steel strip acid dip pickle of this organization of supply.
Background technology
At present, during acid-washing stainless steel, general employing nitration mixture pickling, the nitrogen oxidation of a large amount of high pollution can be produced during nitration mixture pickling
Thing and nitrogenous effluent, and nitrogen oxides and nitrogenous effluent treatment cost are the highest.2012, national environmental protection portion was for iron and steel row
Industry has formulated strict nitrogen pollutant discharge standard, and wherein steel rolling industrial nitric acid mist the highest permission concentration of emission is by original
420mg/m3Fall below 150mg/m3, total nitrogen concentration is not the most limited by sewage discharge, and new standard limits sewage discharge total nitrogen
Concentration need to be less than 15mg/L, and the local total nitrogen concentration higher in environmental requirement need to be less than 5mg/L, when causing rustless steel nitration mixture pickling
The nitrous oxides exhaust gas produced and nitrogenous effluent treatment cost increase.Technique without nitric acid acidwashing becomes acid-washing stainless steel technical field
Trend.
Utility model content
This utility model embodiment provides a kind of acid washing liquid for stainless steel organization of supply and is configured with the stainless of this organization of supply
Steel strip steel pickling device, at least can solve the segmental defect of prior art.
This utility model embodiment relates to a kind of acid washing liquid for stainless steel organization of supply, including acid solution supply line, described acid
Liquid supply line connects has pickle to prepare structure, and described pickle preparation structure includes concentrated sulphuric acid dispensing pipe, sparge pipe, fluorine silicon
Acid dispensing pipe and hydrogen peroxide dispensing pipeline.
As one of embodiment, described acid solution supply line arrival end connects complex acid tank, described concentrated sulphuric acid dispensing pipe, institute
Stating complex acid tank arrival end described in sparge pipe and described hexafluosilicic acid dispensing Guan Junyu to connect, described hydrogen peroxide dispensing line branching connects
On described acid solution supply line.
As one of embodiment, described acid solution supply line is provided with the heating arrangements for heating pickle, described in add
Heat engine structure is between described hydrogen peroxide dispensing line branching junction point and the described acid solution supply pipe port of export.
As one of embodiment, described heating arrangements includes heat exchanger.
As one of embodiment, described acid solution supply line is provided with acid cycle pump, and described acid cycle pump is positioned at institute
State between complex acid tank and described hydrogen peroxide dispensing line branching junction point.
As one of embodiment, described hydrogen peroxide dispensing pipeline one end is connected with described acid solution supply line, and the other end is even
It is connected to hydrogen peroxide dispensing tank connect, is provided with hydrogen peroxide dispensing pump in described hydrogen peroxide dispensing pipeline.
This utility model embodiment relates to a kind of stainless steel strip acid dip pickle, including descaling bath, sets in described descaling bath
Having the spraying and blowing organ for spraying pickle, described spraying and blowing organ connects acid washing liquid for stainless steel organization of supply as above.
As one of embodiment, being provided with overflow launder in described descaling bath, described isopipe root connects acid solution return duct,
Connecting bottom described descaling bath has acid solution evacuated tube, described acid solution evacuated tube to be provided with exhaust-valve；Described acid solution return duct and institute
State acid solution evacuated tube to be all connected with described complex acid tank.
As one of embodiment, described descaling bath top is provided with acid mist emission pipe.
This utility model embodiment at least achieves following beneficial effect: the present embodiment uses concentrated sulphuric acid, hexafluosilicic acid, dioxygen
Water and industry water are configured to mixed acid washing liquid, and supply, to pickling section nozzle, can meet stainless steel strip pickling requirement, it is achieved stainless
Steel band steel without nitric acid acidwashing, it is to avoid use containing nitrogen oxides and the nitrogenous effluent producing high pollution during the nitration mixture pickling of nitric acid,
Thus alleviate environmental pollution.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, the accompanying drawing in describing below is only
It is embodiments more of the present utility model, for those of ordinary skill in the art, in the premise not paying creative work
Under, it is also possible to other accompanying drawing is obtained according to these accompanying drawings.
The structural representation of the stainless steel strip acid dip pickle that Fig. 1 provides for this utility model embodiment.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not making the premise of creative work
Lower obtained all other embodiments, broadly fall into the scope of this utility model protection.
Embodiment one
Such as Fig. 1, this utility model embodiment provides a kind of acid washing liquid for stainless steel organization of supply, for stainless steel strip acid
Nozzle 2 supply acid washing liquid in the section of washing, it includes that acid solution supply line 12, the connection of described acid solution supply line 12 have pickle to join
Structure processed, described pickle preparation structure includes concentrated sulphuric acid dispensing pipe 8, sparge pipe 10, hexafluosilicic acid dispensing pipe 9 and hydrogen peroxide dispensing
Pipeline 14.Above-mentioned concentrated sulphuric acid dispensing pipe 8 is used for supplying concentrated sulphuric acid, and sparge pipe 10 is used for supplying industry water, and hexafluosilicic acid dispensing pipe 9 is used
In supply hexafluosilicic acid, hydrogen peroxide dispensing pipeline 14 is used for supplying hydrogen peroxide.
The present embodiment uses concentrated sulphuric acid, hexafluosilicic acid, hydrogen peroxide and industry water to be configured to mixed acid washing liquid, can meet rustless steel
Strip steel 4 pickling requirement, it is achieved stainless steel strip 4 without nitric acid acidwashing, it is to avoid use containing producing during the nitration mixture pickling of nitric acid high dirty
The nitrogen oxides of dye and nitrogenous effluent, thus alleviate environmental pollution.Wherein, hydrogen peroxide (H2O2) by Fe2+It is oxidized to Fe3+, make molten
Fe in liquid3+Concentration keeps within the specific limits, H2SO4And Fe3+Combination is equivalent to acid with strong oxidizing property, with HNO in nitration mixture3Effect
Quite, iron scale internal layer and chromium depleted layer surface can be penetrated into by oxide skin underbead crack and hole, chromium depleted by dissolving
Layer makes strip steel 4 surface scale quickly peeling-off with metallic matrix and comes off, H2SO also can occur with Fe, the Mn in chromium depleted layer
Reaction produces a large amount of hydrogen, and the release effect of hydrogen also can make oxide skin and metallic matrix peeling-off and come off.Chromium depleted layer is molten
When having solved, Fe3+Strong oxidation can make one layer of fine and close passivating film of strip steel 4 Surface Creation, be mainly composed of Cr2O3, permissible
Metallic matrix is prevented to be etched further.H2SiF6There is activation, SiF6 2-The spot corrosion effect of ion can accelerate acid solution
Iron scale internal layer and chromium depleted layer surface, H is penetrated into by oxide skin underbead crack and hole+Also can with the Fe in chromium depleted layer,
Cr, Mn, Si react and produce a large amount of hydrogen, make chromium depleted layer dissolve, and whole iron scale is produced mechanical stripping effect.Pickling
During, SiF6 2-Ion will not be combined with metal ion generation precipitate, can make solution along with reaction carrying out, in solution
SiF6 2-Ion will not reduce, and acid solution activity keeps constant；Pickling efficiency is greatly improved, and the acid solution life-span is improved, and reduces
Acid solution waste discharge amount, reduces production cost；In acid cleaning process, hard owing to not having fluoride precipitation to be combined generation with oxide skin
Dirt, what belt steel surface came off oxide skin is easily flush with water such as sand, will not block pickling pipeline, decrease shutdown
Maintenance times.
Usually, required acid is made in concentrated sulphuric acid, industry water, hexafluosilicic acid and hydrogen peroxide can be proportionally added into complex acid tank 11
After washing liquid, then supplied to each nozzle 2 by above-mentioned acid solution supply line 12；But during complex acid, when concentrated sulphuric acid mixes with water
Amount of heat can be produced, the decomposition of hydrogen peroxide can be aggravated, and then cause hydrogen peroxide to lose efficacy, therefore, in the present embodiment, use as follows
Optimal way: such as Fig. 1, described acid solution supply line 12 arrival end connects complex acid tank 11, described concentrated sulphuric acid dispensing pipe 8, described
Sparge pipe 10 and described hexafluosilicic acid dispensing pipe 9 are all connected with described complex acid tank 11 arrival end, described hydrogen peroxide dispensing pipeline 14 points
Prop up and be connected on described acid solution supply line 12.During due to hydrogen peroxide by branch line 14 dispensing to acid solution supply line 12, dense
Sulphuric acid and water are sufficiently mixed in complex acid tank 11, will not produce amount of heat again, thus can prevent the thermal decomposition of hydrogen peroxide, protect
The pickling effect of card pickle.Wherein, hydrogen peroxide dispensing pipeline 14 one end is connected with described acid solution supply line 12, and the other end is even
It is connected to hydrogen peroxide dispensing tank 16 connect, is provided with hydrogen peroxide dispensing pump 15 in described hydrogen peroxide dispensing pipeline 14；In acid solution supply
Pipeline 12 is provided with acid cycle pump 13, and described acid cycle pump 13 is positioned at described complex acid tank 11 and described hydrogen peroxide dispensing pipeline
Between 14 branch's junction points, certainly, above-mentioned acid cycle pump 13 may be alternatively provided at hydrogen peroxide dispensing pipeline 14 branch's junction point and acid
Between liquid supply line 12 port of export.
Further, above-mentioned acid solution supply line 12 is provided with the heating arrangements 17 for heating pickle, described in add
Heat engine structure 17 is between described hydrogen peroxide dispensing pipeline 14 branch's junction point and the described acid solution supply pipe port of export.Hydrogen peroxide with
The mixed acid exported by complex acid tank 11 enters above-mentioned heating arrangements 17 and heats after mixing on acid solution supply line 12, then delivers to each
Nozzle 2, i.e. improves the temperature of pickle, can improve pickling effect.Preferably, described heating arrangements 17 includes heat exchanger 17, should
Heat exchanger 17 can be water-water heat exchanger or the shell-and-tube heat exchanger etc. using flue gas heat exchange.
Embodiment two
This utility model embodiment relates to a kind of stainless steel strip acid dip pickle, including descaling bath 1, in described descaling bath 1
Being provided with the spraying and blowing organ 2 for spraying pickle, described spraying and blowing organ 2 connects pickle organization of supply, wherein, this pickle
Organization of supply is preferably the acid washing liquid for stainless steel organization of supply used provided in embodiment one, and concrete structure is the most superfluous
State.
Such as Fig. 1, being provided with overflow launder 3 in described descaling bath 1, connecting bottom described overflow launder 3 has acid solution return duct 5, described
Connecting bottom descaling bath 1 has acid solution evacuated tube 7, described acid solution evacuated tube 7 to be provided with exhaust-valve 6；Described acid solution return duct 5 and institute
State acid solution evacuated tube 7 to be all connected with described complex acid tank 11.By said structure, form the circulation-supplied system of pickle, reduce
Pickle consumption.Wherein, typically descaling bath 1 two ends are provided with above-mentioned overflow launder 3, when descaling bath 1 is longer, the most also set
There is overflow launder 3, bottom each overflow launder 3, be provided with refluxing opening, in order to connect above-mentioned acid solution return duct 5；Between adjacent two overflow launders 3,
The bottom of descaling bath 1 becomes V-structure, can be easy to collecting of the iron scale etc. under the pickle of spray and pickling, above-mentioned acid solution
Evacuated tube 7 may connect to bottom or the bottom of this V-structure a little higher than of above-mentioned V-structure.When normally producing, above-mentioned acid solution is arranged
Exhaust-valve 6 on blank pipe 7 is to close, and when stopping pickling work, can open above-mentioned exhaust-valve 6, by the pickling in descaling bath 1
Liquid is emitted in complex acid tank 11 and recycles.Wherein, if the pickle through the discharge of above-mentioned acid solution evacuated tube 7 is dirtier, i.e. contain relatively
During the impurity such as many iron scales, can be by arranging outside outer comb, i.e. the bottom at above-mentioned V-structure is also associated with outer comb, outward
Comb is provided with discharging valve；Or, above-mentioned dirtier pickle can recycling after solid-liquid separation, the most above-mentioned acid solution empty
Pipe 7 connects equipment for separating liquid from solid, and the liquid outlet of equipment for separating liquid from solid is connected with complex acid tank 11.It addition, described descaling bath 1 pushes up
Portion is provided with acid mist emission pipe 18, and above-mentioned acid mist emission pipe 18 can be respectively provided with at descaling bath 1 two ends.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all at this
Within the spirit of utility model and principle, any modification, equivalent substitution and improvement etc. made, should be included in this utility model
Protection domain within.
Claims (8)
1. an acid washing liquid for stainless steel organization of supply, it is characterised in that: including acid solution supply line, described acid solution supply line is even
Being connected to pickle preparation structure, described pickle preparation structure includes concentrated sulphuric acid dispensing pipe, sparge pipe, hexafluosilicic acid dispensing pipe and double
Oxygen water dispensing pipeline；
Described acid solution supply line arrival end connects complex acid tank, described concentrated sulphuric acid dispensing pipe, described sparge pipe and described fluorine silicon
Complex acid tank arrival end described in acid dispensing Guan Junyu connects, and described hydrogen peroxide dispensing line branching is connected to described acid solution supply line
On.
Acid washing liquid for stainless steel organization of supply the most according to claim 1, it is characterised in that: set on described acid solution supply line
Having the heating arrangements for heating pickle, described heating arrangements is positioned at described hydrogen peroxide dispensing line branching junction point with described
Between the acid solution supply pipe port of export.
Acid washing liquid for stainless steel organization of supply the most according to claim 2, it is characterised in that: described heating arrangements includes heat exchange
Device.
Acid washing liquid for stainless steel organization of supply the most according to claim 1, it is characterised in that: set on described acid solution supply line
Having acid cycle pump, described acid cycle pump is between described complex acid tank and described hydrogen peroxide dispensing line branching junction point.
Acid washing liquid for stainless steel organization of supply the most according to claim 1, it is characterised in that: described hydrogen peroxide dispensing pipeline one
End is connected with described acid solution supply line, and the other end connects has hydrogen peroxide dispensing tank to connect, on described hydrogen peroxide dispensing pipeline
It is provided with hydrogen peroxide dispensing pump.
6. a stainless steel strip acid dip pickle, including descaling bath, is provided with the winding-up for spraying pickle in described descaling bath
Mechanism, it is characterised in that: described spraying and blowing organ connects just like the acid washing liquid for stainless steel confession according to any one of claim 1 to 5
Answer mechanism.
Stainless steel strip acid dip pickle the most according to claim 6, it is characterised in that: it is provided with overflow in described descaling bath
Groove, described isopipe root connects acid solution return duct, and connecting bottom described descaling bath has acid solution evacuated tube, and described acid solution empties
Pipe is provided with exhaust-valve；Described acid solution return duct and described acid solution evacuated tube are all connected with described complex acid tank.
Stainless steel strip acid dip pickle the most according to claim 6, it is characterised in that: described descaling bath top is provided with acid mist
Delivery pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620496594.4U CN205839139U (en) | 2016-05-26 | 2016-05-26 | Acid washing liquid for stainless steel organization of supply and stainless steel strip acid dip pickle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620496594.4U CN205839139U (en) | 2016-05-26 | 2016-05-26 | Acid washing liquid for stainless steel organization of supply and stainless steel strip acid dip pickle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205839139U true CN205839139U (en) | 2016-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620496594.4U Active CN205839139U (en) | 2016-05-26 | 2016-05-26 | Acid washing liquid for stainless steel organization of supply and stainless steel strip acid dip pickle |
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| CN (1) | CN205839139U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109136961A (en) * | 2018-11-19 | 2019-01-04 | 海盐力拓金属制品有限公司 | A kind of metal wire rod pickler |
| CN113330144A (en) * | 2019-03-22 | 2021-08-31 | 普锐特冶金技术日本有限公司 | Acid solution preparation device, acid solution supply device and acid pickling equipment |
-
2016
- 2016-05-26 CN CN201620496594.4U patent/CN205839139U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109136961A (en) * | 2018-11-19 | 2019-01-04 | 海盐力拓金属制品有限公司 | A kind of metal wire rod pickler |
| CN113330144A (en) * | 2019-03-22 | 2021-08-31 | 普锐特冶金技术日本有限公司 | Acid solution preparation device, acid solution supply device and acid pickling equipment |
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