CN209113642U - A kind of harmless treatment device of iron and steel pickling waste liquid - Google Patents
A kind of harmless treatment device of iron and steel pickling waste liquid Download PDFInfo
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- CN209113642U CN209113642U CN201821864201.6U CN201821864201U CN209113642U CN 209113642 U CN209113642 U CN 209113642U CN 201821864201 U CN201821864201 U CN 201821864201U CN 209113642 U CN209113642 U CN 209113642U
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Abstract
The utility model discloses a kind of harmless treatment devices of iron and steel pickling waste liquid, belong to devil liquor recovery processing technology field, the device includes passing through the sequentially connected waste liquid storage pool of pipeline, sedimentation basin and sandfiltration pot, the sedimentation basin is connected to the sandfiltration pot by drainage pipeline, venturi mixer is equipped between the sedimentation basin and waste liquid storage pool, the venturi mixer is communicated with alkali liquid tank by pipeline, the bottom of the sedimentation basin is connected with concentration basin, the concentration basin is connected to by waste pipe with the waste liquid storage pool, the concentration basin is connected with acid-washing waste acid pond in turn by Residue extraction pipeline, filter device and reaction kettle, iron filings slot is connected at the top of the acid-washing waste acid pond, stabilizer tank and oxidant tank are connected at the top of the reaction kettle.Waste water, the spent acid for generating steel processing enterprise pickling iron and steel obtain integrated treatment and utilization, and no waste water,waste gas and industrial residue generates, and enterprise is made to be truly realized innoxious clean manufacturing.
Description
Technical field
The utility model relates to devil liquor recovery processing technology fields, and in particular to a kind of innoxious place of iron and steel pickling waste liquid
Manage device.
Background technique
Steel processing enterprise is purged steel surface iron rust, generally uses hydrochloric acid, sulfuric acid washing, is then washed with clear water
The method washed, this creates the terminal largely mainly acid waste water and acid pickle of acid washing containing iron ion can be right if direct emission
Environment causes seriously to pollute.
The domestic processing to these spent acid, waste water now is main, and there are as below methods:
1, feeding lime powder or lime slurry carry out chemical neutralization, precipitation process, and a large amount of waste residues of generation can also generate two
Secondary pollution needs further to carry out harmless treatment to waste residue, and this not only adds entreprise cost burdens, also result in useful resources
Waste；
2, the spent acid in acid pickle being recycled, but process specifications are high, complex process, equipment investment is big,
Operating cost is high, and needs another oil (gas) filling device to handle waste water, therefore is hardly obtained practical application.
Therefore, harmless treatment and the waste utilization device for studying a kind of iron and steel pickling waste liquid, without any pernicious gas, liquid
The generation of body and solid waste accomplishes " waste utilization is turned waste into wealth ", meets the principles and requirements of clean manufacturing, either from ring
Border protection aspect, or from the aspect of business economic interests, there is important meaning.
Utility model content
In view of the above technical problems, the utility model provides a kind of harmless treatment device of iron and steel pickling waste liquid, makes steel
Waste water, the spent acid of ironworking enterprise pickling iron and steel generation obtain integrated treatment and utilization, and no waste water, harmful exhaust, waste residue generate,
So that enterprise is truly realized innoxious clean manufacturing, and achieves good economic benefit for enterprise.
To achieve the goals above, the technical solution adopted in the utility model is as follows:
A kind of harmless treatment device of iron and steel pickling waste liquid, including pass through the sequentially connected waste liquid storage pool of pipeline, sink
Shallow lake pond and sandfiltration pot, the sedimentation basin are connected to the sandfiltration pot by drainage pipeline, the sedimentation basin and waste liquid storage pool it
Between be equipped with venturi mixer, the venturi mixer is communicated with alkali liquid tank by pipeline, and the bottom of the sedimentation basin connects
Have a concentration basin, the concentration basin is connected to by waste pipe with the waste liquid storage pool, the concentration basin pass through Residue extraction pipeline according to
It is secondary to be connected with acid-washing waste acid pond, filter device and reaction kettle, iron filings slot, the reaction are connected at the top of the acid-washing waste acid pond
Kettle top portion is connected with stabilizer tank and oxidant tank.
Preferably, the pipeline between the waste liquid storage pool and the sedimentation basin is equipped with elevator pump.
Preferably, the sedimentation basin uses vertical sedimentation basin, and one end of the drainage pipeline connects in the sedimentation basin
The overflow weir in portion, the other end of the drainage pipeline connect the top of the sandfiltration pot.
Preferably, the bottom of the sandfiltration pot is equipped with clear water drainage pipeline, and the bottom side of the sandfiltration pot is equipped with recoil
Wash water pipeline, the top side of the sandfiltration pot are equipped with backwash drainage pipeline.
Preferably, the reaction kettle is oxidative polymerization kettle, is equipped with blender in the reaction kettle.
Preferably, the filter device is corrosion-resistant filtering screen filtration device.
The beneficial effects of the utility model are shown:
1, waste water, the spent acid for generating steel processing enterprise pickling iron and steel obtain integrated treatment and utilization, present treatment device
No waste water, harmful exhaust, waste residue generate, and enterprise is made to be truly realized innoxious clean manufacturing, and achieve for enterprise good
Economic benefit；
2, present treatment appliance arrangement is simple, and investment is small, processing capacity is strong, occupied area is small, and operating cost is low；
3, the present apparatus adapts to wide, can not only give up to steel processing enterprise chlorohydric acid pickling spent acid, waste water but also to sulfuric acid washing
Acid, waste water carry out harmless treatment；
4, operation is easy to operate, and gained flocculant product quality is stablized, and flocculating effect is good, alternative aluminium polychloride, but
Cost substantially reduces；
5, through the present apparatus, treated that pickling waste waters water quality is as clear as crystal, and impurity is few, can be suitable with tap water, can all return
With.
Detailed description of the invention
Fig. 1 is a kind of overall structure diagram of the harmless treatment device of iron and steel pickling waste liquid of the utility model.
In figure: 1- waste liquid storage pool, 2- sedimentation basin, 3- sandfiltration pot, 4- drainage pipeline, 5- alkali liquid tank, 6- concentration basin, 7- are useless
Waterpipe, 8- Residue extraction pipeline, 9- acid-washing waste acid pond, 10- filter device, 11- reaction kettle, 12- iron filings slot, 13- stabilizer tank,
14- oxidant tank, 15- elevator pump, 16- clear water drainage pipeline, 17- backwashing water pipeline, 18- backwash drainage pipeline, 19- text
Mixer in mound.
Specific embodiment
In order to facilitate the understanding of those skilled in the art, the utility model will be further described below with reference to the accompanying drawings.
A kind of harmless treatment device of iron and steel pickling waste liquid as shown in Figure 1, including it is sequentially connected useless by pipeline
Liquid storage pool 1, sedimentation basin 2 and sandfiltration pot 3, the sedimentation basin 2 are connected to the sandfiltration pot 3 by drainage pipeline 4, the precipitating
Venturi mixer 19 is equipped between pond 2 and waste liquid storage pool 1, the venturi mixer 19 is communicated with alkali liquid tank by pipeline
5, the bottom of the sedimentation basin 2 is connected with concentration basin 6, and the concentration basin 6 is connected by waste pipe 7 and the waste liquid storage pool 1
Logical, the concentration basin 6 is connected with acid-washing waste acid pond 9, filter device 10 and reaction kettle 11, the acid in turn by Residue extraction pipeline 8
The top for washing spent acid pond 9 is connected with iron filings slot 12, is connected with stabilizer tank 13 and oxidant tank 14 at the top of the reaction kettle 11.
Pipeline between the waste liquid storage pool 1 and the sedimentation basin 2 is equipped with elevator pump 15.The sedimentation basin 2 uses
Vertical sedimentation basin, one end of the drainage pipeline 4 connect the overflow weir inside the sedimentation basin 2, the drainage pipeline 4 it is another
One end connects the top of the sandfiltration pot 3.The bottom of the sandfiltration pot 3 is equipped with clear water drainage pipeline 16, the bottom of the sandfiltration pot 3
Portion side is equipped with backwashing water pipeline 17, and the top side of the sandfiltration pot 3 is equipped with backwash drainage pipeline 18.The reaction kettle
11 be oxidative polymerization kettle, is equipped with blender in the reaction kettle 11.The filter device 10 is sieved through for corrosion-resistant filter screen
Filter device.
Illustrate below in conjunction with specific embodiment using a kind of above-mentioned steel of the harmless treatment device of iron and steel pickling waste liquid
The harmless treatment process of pickle liquor.
Embodiment 1:
A kind of harmless treatment process of iron and steel pickling waste liquid, comprising the following steps:
(1) the iron-containing acidic ion waste liquid in waste liquid storage pool 1 and the sodium hydroxide solution in alkali liquid tank 5 are mixed in venturi
Clutch 19 mixes, and mixed liquor enters reaction in sedimentation basin 2, and the pH value of mixed liquor is controlled 7.5, makes H in waste liquid+With OH-It is combined into
Water to deacidify, meanwhile, make Fe2+、Fe3+Generate Fe (OH) respectively2、Fe(OH)3Precipitating, sediment separate in sedimentation basin 2 with water,
Water enters sandfiltration pot 3, further removes suspended contamination, and reuse is discharged by clear water drainage pipeline 16 in clear water, when retention suspended matter
Reach a certain amount of, the backwashing water pipeline 17 through 3 bottom of sandfiltration pot is pumped into clear water and carries out backwash to sandfiltration pot 3, and backwash water is by sand
The backwash drainage pipeline 18 on 3 top of filter tank is discharged into waste liquid storage pool 1；
(2) 2 bottom sediment of sedimentation basin is discharged into concentration basin 6, and in concentration basin 6, sediment and water is again under the effect of gravity
Separation, is concentrated sediment further, supernatant is discharged into waste liquid storage pool 1 through waste pipe 7；
(3) sediment after being concentrated enters in acid-washing waste acid pond 9 through Residue extraction pipeline 8, reacts with spent acid, generates solubility two
Valence molysite, trivalent iron salt and water after sediment are completely dissolved, the iron filings in iron filings slot 12 are added in the above solution, neutralize residual
Remaining spent acid generates harmless hydrogen and soluble divalent iron salt, while excessive iron filings are Fe3+It is reduced to Fe2+, solution at this time
Main component become: water, Fe2+, acid ion and iron filings, through measuring Fe3+When content is less than the 1% of waste liquid total iron
It is considered as reaction end；
(4) above-mentioned solution filters out iron filings reuse through filter device 10, and filtrate enters reaction kettle 11, in 60 DEG C and pH
Under conditions of value is 1, the oxidant sodium chlorate in oxidant tank 14 is added under stirring, makes Fe2+It is completely converted into Fe3+,
To make Fe as far as possible2+It is completely converted into Fe3+, slightly excessive sodium chlorate is added (by sodium chlorate and Fe2+Molar ratio is 0.18:1-
0.19:1), Fe3+Polymerization reaction is hydrolyzed, measures Fe2+When content is less than 1%, reaction terminates, and stabilizer tank 13 is then added
In stabilizer sodium dihydrogen phosphate, additional amount be 2 ㎏ per ton, finally obtain polymeric ferric salt flocculant solution.
Embodiment 2:
A kind of harmless treatment process of iron and steel pickling waste liquid, comprising the following steps:
(1) the iron-containing acidic ion waste liquid in waste liquid storage pool 1 and the sodium hydroxide solution in alkali liquid tank 5 are mixed in venturi
Clutch 19 mixes, and mixed liquor enters reaction in sedimentation basin 2, and the pH value of mixed liquor is controlled 9, makes H in waste liquid+With OH-It is combined into water
With deacidification, meanwhile, make Fe2+、Fe3+Generate Fe (OH) respectively2、Fe(OH)3Precipitating, sediment separate in sedimentation basin 2 with water, water
Into sandfiltration pot 3, suspended contamination is further removed, reuse is discharged by clear water drainage pipeline 16 in clear water, when retention suspended matter reaches
To a certain amount of, the backwashing water pipeline 17 through 3 bottom of sandfiltration pot is pumped into clear water and carries out backwash to sandfiltration pot 3, and backwash water is by sand filtration
The backwash drainage pipeline 18 on 3 top of tank is discharged into waste liquid storage pool 1；
(2) 2 bottom sediment of sedimentation basin is discharged into concentration basin 6, and in concentration basin 6, sediment and water is again under the effect of gravity
Separation, is concentrated sediment further, supernatant is discharged into waste liquid storage pool 1 through waste pipe 7；
(3) sediment after being concentrated enters in acid-washing waste acid pond 9 through Residue extraction pipeline 8, reacts with spent acid, generates solubility two
Valence molysite, trivalent iron salt and water after sediment are completely dissolved, the iron filings in iron filings slot 12 are added in the above solution, neutralize residual
Remaining spent acid generates harmless hydrogen and soluble divalent iron salt, while excessive iron filings are Fe3+It is reduced to Fe2+, solution at this time
Main component become: water, Fe2+, acid ion and iron filings, through measuring Fe3+When content is less than the 1% of waste liquid total iron
It is considered as reaction end；
(4) above-mentioned solution filters out iron filings reuse through filter device 10, and filtrate enters reaction kettle 11, in 30 DEG C and pH
Under conditions of value is 0.5, the oxidant hydrogen peroxide in oxidant tank 14 is added under stirring, makes Fe2+It is completely converted into Fe3 +, to make Fe as far as possible2+It is completely converted into Fe3+, slightly excessive hydrogen peroxide is added (by hydrogen peroxide and Fe2+Molar ratio is 0.65:1-
0.7:1), Fe3+Polymerization reaction is hydrolyzed, measures Fe2+When content is less than 1%, reaction terminates, and stabilizer tank 13 is then added
In stabilizer ammonium dihydrogen phosphate, additional amount be 1.5 ㎏ per ton, finally obtain polymeric ferric salt flocculant solution.
Since iron-content often has a fluctuation in iron and steel pickling waste liquid, therefore oxidant dosage is according to surveying Fe every time in filtrate2+
Content, by each oxidant and Fe2+Reaction molar ratio calculate determine.
Using the technique, processed waste water fully recovering；The poly-ferric chloride flocculation produced after pickle liquor integrated treatment
Agent, polymeric ferric sulfate flocculant, quality is reliable and stable, indices meet or exceed state quality standard requirement, by with
It industries waste water and the sanitary sewage disposal such as butchers in printing and dyeing, oil and fat chemical, food, achieves good result.
Above content is only the structure example and explanation to the utility model, the technologies of affiliated the art
Personnel make various modifications or additions to the described embodiments or are substituted in a similar manner, without departing from
The structure of utility model or beyond the scope defined by this claim, all should belong to the protection range of the utility model.
Claims (6)
1. a kind of harmless treatment device of iron and steel pickling waste liquid, which is characterized in that including passing through the sequentially connected waste liquid of pipeline
Storage pool, sedimentation basin and sandfiltration pot, the sedimentation basin are connected to the sandfiltration pot by drainage pipeline, the sedimentation basin and waste liquid
Venturi mixer is equipped between storage pool, the venturi mixer is communicated with alkali liquid tank by pipeline, the sedimentation basin
Bottom is connected with concentration basin, and the concentration basin is connected to by waste pipe with the waste liquid storage pool, and the concentration basin passes through row
Slag pipeline is connected with acid-washing waste acid pond, filter device and reaction kettle in turn, is connected with iron filings slot at the top of the acid-washing waste acid pond,
Stabilizer tank and oxidant tank are connected at the top of the reaction kettle.
2. a kind of harmless treatment device of iron and steel pickling waste liquid according to claim 1, which is characterized in that the waste liquid
Pipeline between storage pool and the sedimentation basin is equipped with elevator pump.
3. a kind of harmless treatment device of iron and steel pickling waste liquid according to claim 1, which is characterized in that the precipitating
Pond uses vertical sedimentation basin, and one end of the drainage pipeline connects the overflow weir inside the sedimentation basin, the drainage pipeline
The other end connect the top of the sandfiltration pot.
4. a kind of harmless treatment device of iron and steel pickling waste liquid according to claim 1, which is characterized in that the sand filtration
The bottom of tank is equipped with clear water drainage pipeline, and the bottom side of the sandfiltration pot is equipped with backwashing water pipeline, the top of the sandfiltration pot
Portion side is equipped with backwash drainage pipeline.
5. a kind of harmless treatment device of iron and steel pickling waste liquid according to claim 1, which is characterized in that the reaction
Kettle is oxidative polymerization kettle, is equipped with blender in the reaction kettle.
6. a kind of harmless treatment device of iron and steel pickling waste liquid according to claim 1, which is characterized in that the filtering
Device is corrosion-resistant filtering screen filtration device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821864201.6U CN209113642U (en) | 2018-11-13 | 2018-11-13 | A kind of harmless treatment device of iron and steel pickling waste liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821864201.6U CN209113642U (en) | 2018-11-13 | 2018-11-13 | A kind of harmless treatment device of iron and steel pickling waste liquid |
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| Publication Number | Publication Date |
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| CN209113642U true CN209113642U (en) | 2019-07-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112645483A (en) * | 2020-11-10 | 2021-04-13 | 常熟市电热合金材料厂有限公司 | System and method for recycling waste acid liquor generated by pickling of electric heating alloy wires |
-
2018
- 2018-11-13 CN CN201821864201.6U patent/CN209113642U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112645483A (en) * | 2020-11-10 | 2021-04-13 | 常熟市电热合金材料厂有限公司 | System and method for recycling waste acid liquor generated by pickling of electric heating alloy wires |
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