CN105293745B - Cold-rolling pickling wastewater recycling treatment process system - Google Patents
Cold-rolling pickling wastewater recycling treatment process system Download PDFInfo
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- CN105293745B CN105293745B CN201410235424.6A CN201410235424A CN105293745B CN 105293745 B CN105293745 B CN 105293745B CN 201410235424 A CN201410235424 A CN 201410235424A CN 105293745 B CN105293745 B CN 105293745B
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Abstract
The present invention relates to cold-rolling pickling wastewater recycling treatment process systems.Including raw water box, intake pump, filter, cation exchange resin bed, water producing tank, product water delivery pump, acid solution case, acid solution delivery pump, pure water tank, pure water delivery pump, regenerated liquid collecting box, regenerated liquid delivery pump, exhausted bath box, waste water delivery pump.In cation exchange resin bed device resin is adsorbed equipped with iron ion special project.Treatment effect of the present invention is stablized, and the iron ion in pickling waste waters can be effectively removed, and makes pickling waste waters recycling, and equipment automatization operational degree is high, and operation operation is easy.
Description
Technical field
The invention belongs to water-treatment technology fields, and in particular to a kind of recycling treatment of steel industry cold-rolling pickling wastewater
Process system.
Background technology
In face of china natural resources shortage, the situation that becomes increasingly conspicuous of environmental problem, steel and iron industry according to the Scientific Outlook on Development and will be followed
The principle of ring economy, creates a new pattern of growth, and improves development quality, under the premise of adhering to scientific development, " water-saving, energy saving, drop
Consume, subtract dirty, synergy " it is used as main goal of attack, by implementation clean manufacturing, technological progress, resource is made to obtain efficiently and recycle,
Steel and iron industry is promoted to realize sustainable development.
Pickling was added with acid (such as sulfuric acid, hydrochloric acid, hydrofluoric acid) side before intermetallic composite coating to keep metal surface clean and tidy
Metal is cleaned on warm side, the technical process such as the oxide of removal attachment on the metal surface.The gold taken out from pickle
Belong to material, still adheres to remaining pickle on surface, it is necessary to be rinsed with water, the flushing water being thus discharged is pickling waste waters.
For pickling waste waters in acidity, acidity is about 0.5-2%, major pollutants Fe2+And Fe3+.Currently, iron and steel enterprise passes
The wastewater treatment method of system is to use lime neutralisation, feeding lime and is subject to Air Exposure in pH adjustment tanks, makes Fe2+Switch to
For Fe3+, and pH is adjusted to 7-9, make Fe3+Generate hydroxide sediment.By adding coagulant, flocculation aid, hydroxide is improved
The sedimentation effect of iron, is separated by solid-liquid separation in sedimentation basin.Traditional treatment method is preferable to the removal effect of iron ion, but medicament
It is higher to add cost, ion need to be additionally added in existing waste water, improves conductivity of waste water, is unfavorable for the depth of later stage waste water
Reason, sludge yield is larger to cause secondary pollution, and causes the waste of resource.
In addition, the recycling technique to acid waste water also has more research.In patent of invention《At the recycling of acid waste water
Reason method》(application number：Desalination and removal are carried out to acid waste water using the formula of falling pole electrodialysis plant in 200710305461.X)
The processing of metal ion.The ejected wash water that production water can be used as acid cleaning process uses, and up to 85%, metal removal rate exists the device rate of recovery
93% or more.But this technique still will produce small part concentrated water, be unable to reach the thorough recycling of waste water.
To realize the sustainable development of enterprise, resource is set to obtain efficiently and recycle, there is an urgent need for a kind of pickling waste waters
Resource utilization process.
Invention content
To solve the above problems, being directed to cold-rolling pickling wastewater water quality characteristics, the present invention provides one kind being suitable for cold rolling acid
Waste water reclaiming treatment process system is washed, treatment effect of the present invention is stablized, and the iron ion in pickling waste waters can be effectively removed, and realizes
Pickling waste waters recycling efficiently utilizes, and equipment automatization operational degree is high, and operation operation is easy.
Technical solution of the invention is as follows：
Cold-rolling pickling wastewater recycling treatment process system, it includes：
Raw water box, intake pump, filter, cation exchange resin bed, water producing tank, product water delivery pump, acid solution case, acid solution
Delivery pump, pure water tank, pure water delivery pump, regenerated liquid collecting box, regenerated liquid delivery pump, exhausted bath box, waste water delivery pump.
The raw water box upper inlet connects pickling waste waters, and outlet connects filter by intake pump；Filter outlet connects sun
Ion exchange resin bed；
The cation exchange resin bed, outlet connection water producing tank.
The water producing tank by product water delivery pump be delivered to diluted alkaline system and regulating reservoir, used as neutralizer.
The cation exchange resin bed import connection acid solution delivery pump and pure water delivery pump, outlet connection regenerated liquid are received
Header and exhausted bath box；
The acid solution case import connects pure water and salt acid treatment, and outlet connects cation exchange resin by acid solution delivery pump
Bed；
The pure water tank import connects pure water, and outlet connects cation exchange resin bed by pure water delivery pump；
The regenerated liquid collecting box is exported is delivered to acid purification system by regenerated liquid delivery pump；
The exhausted bath box outlet conveys pumped back raw water box by waste water.
The filter, using PVDF materials, when filter inlet outlet pressure differential reaches limit value, be passed through compressed air or
Steam is cleaned.
Total oil≤1.0mg/L, suspended matter≤50mg/L, iron ion≤5000mg/L, acidity 0.5- in the pickling waste waters
2%.
Cation exchange resin bed influent quality needs to meet, total oil≤1.0mg/L, suspended matter≤10mg/L.
The cation exchange resin bed, bed is interior to adsorb resin equipped with iron ion special project, is commercial product.
The cation exchange resin bed, regenerative agent are the hydrochloric acid that mass percentage content is 15%, and regenerative agent is used
The resin volume that amount is 1-1.2 times.
Suspended matter≤1000mg/L in the cation exchange resin regenerated liquid, sulfate radical≤300mg/L, sodium ion≤
50mg/L, iron ion >=20000mg/L.
The present invention is allowed to compared with prior art, have the advantage that as a result of above technical scheme：
Process system using the present invention, treatment effect is stable, can effectively remove iron ion in pickling waste waters, makes pickling
Utilization of wastewater resource, equipment automatization operational degree is high, and operation operation is easy.Product water after processing, can be used as cold rolling
The neutralization medicament of waste water station diluted alkaline system uses.Cation exchange resin regenerated liquid can be sent to acid regeneration production line, for roasting
Brown iron oxide, and generate regenerated acid and used for pickling unit processing line.In addition, being greatly decreased with lime consumption amount, waste water
Final discharge water conductivity, the total hardness of standing can obviously reduce, and be conducive to the advanced treating of final waste discharge.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of cold-rolling pickling wastewater recycling treatment process system of the present invention；
Specific implementation mode
It elaborates with reference to the accompanying drawings and examples to the present invention.
Total oil≤1.0mg/L, suspended matter≤50mg/L, iron ion≤5000mg/L, acidity 0.5-2% in pickling waste waters.
Cold-rolling pickling wastewater recycling treatment process system, including：Raw water box, intake pump, filter, cation exchange resin bed, production
Water tank, product water delivery pump, acid solution case, acid solution delivery pump, pure water tank, pure water delivery pump, regenerated liquid collecting box, regenerated liquid conveying
Pump, exhausted bath box, waste water delivery pump.
Filter, using PVDF materials, when filter inlet outlet pressure differential reaches limit value, be passed through compressed air or steam into
Row cleaning, can restore original design flux.PVDF (Kynoar) filter has good mechanical performance, good toughness, chemistry
Stability is good, pH tolerance ranges are wider, be suitable for pickling waste waters filtering, but to the antifouling property of organic matter and oils compared with
Difference.If carrying out Organic substance in water and oil content being higher, other pretreating process need to be used, make cation exchange resin bed water inlet water
Matter needs to meet, total oil≤1.0mg/L, suspended matter≤10mg/L.
Resin is adsorbed equipped with iron ion special project in cation exchange resin bed, which is added solid catalyst, adsorbs iron
Ion energy is strong, and adsorption capacity is big, but to other cations (such as Na+、K+、Ca2+、Mg2+Deng) there is certain adsorption capacity, but
Adsorption capacity is weaker, is easily saturated, and can be swapped again with iron ion after saturation.
When initial launch, resin need to be pre-processed, and reach maximum adsorption capacity, and concrete scheme is as follows：Using
25%NaCl impregnates 1d, and pure water rinses 15min；10%HCl is used to impregnate 1d again, pure water is rinsed to neutrality；Using 10%NaOH
1d is impregnated, pure water is rinsed to conductivity≤400us/cm, and pretreatment finishes.
Cation exchange resin operating flux is 0.2m3/h.When the production full iron of water increases (>=10mg/L) suddenly, show sun
Ion exchange resin has been saturated, and need to be regenerated, regeneration technology is as follows：It is rinsed, is vented using 50L pure water；Using
30L10-15% salt acid soak 2h, emptying；30L10-15% salt acid soak 2h, emptying are used again；Finally using pure water rinse to
Colourless, the full iron ＜ 10mg/L of rinsing liquid, regeneration finishes.
The neutralization medicament that product water can be used as cold rolling wastewater station diluted alkaline system uses.Full iron in diluted alkaline system requirements product water
≤10mg/L。
The regenerated liquid of generation can be sent to acid regeneration production line, be used for roasting oxidation iron powder.Acid regeneration production line requires regeneration
Suspended matter≤1000mg/L in liquid, sulfate radical≤300mg/L, sodium ion≤50mg/L, iron ion >=20000mg/L.
The rinse water generated when regeneration sends raw water box back to.
Below by way of specific embodiment, the present invention is further elaborated.
Embodiment is using the pickling waste waters of a certain pickling unit in cold rolling wastewater station as raw water, treating capacity 0.2m3/ h, place
Manage flow refer to the attached drawing.It is as follows：Pickling waste waters is passed through filter, removes the suspended matter in waste water；After filtering
Pickling waste waters by cation exchange resin bed, remove the iron ion in pickling waste waters, product water is delivered to cold rolling wastewater station
Diluted alkaline system；After cation exchange resin bed fails (the full iron >=10mg/L of product water), carried out again using the hydrochloric acid of 10-15%
Raw, regenerated liquid can be sent to acid regeneration production line.Water inlet, product water and regenerated liquid water quality situation are as in the table below：
Table one：Pickling waste waters recycling treatment process Inlet and outlet water water quality situation
Table two：Pickling waste waters recycling treatment process regenerated liquid water quality situation
In summary, pickling waste waters recycling treatment process using the present invention, treatment effect is stable, can effectively remove acid
The iron ion in waste water is washed, the system rate of recovery is 90% or more, and total iron removal rate >=99%, reaching makes pickling waste waters efficient resource
Change the purpose utilized, and system treatment effeciency is high, technological process is short, equipment automatization operational degree is high, operation and Operation and Maintenance
It is easy.
Certainly, in the art one it should be recognized by those skilled in the art that above-mentioned implementation is intended merely to illustrate the present invention,
And it is not used as limitation of the invention, as long as in the spirit of the present invention, transformation, deformation to above-described embodiment
It will all fall within the scope of the following claims.
Claims (6)
1. cold-rolling pickling wastewater recycling treatment process system, which is characterized in that system include raw water box, intake pump, filter,
Cation exchange resin bed, water producing tank, product water delivery pump, acid solution case, acid solution delivery pump, pure water tank, pure water delivery pump, regeneration
Liquid collecting box, regenerated liquid delivery pump, exhausted bath box and waste water delivery pump；Raw water box upper inlet connects pickling waste waters, outlet by into
Water pump connects filter；Filter outlet connects cation exchange resin bed；Cation exchange resin bed, outlet connection water producing tank；
Water producing tank by product water delivery pump be delivered to diluted alkaline system and regulating reservoir, used as neutralizer；
Cation exchange resin bed influent quality need to meet total oil≤1.0mg/L, suspended matter≤10mg/L；
The cation exchange resin bed, bed is interior to adsorb resin equipped with iron ion special project；
The cation exchange resin bed, regenerative agent are the hydrochloric acid that mass percent is 10-15%, regenerant consumption 1-
1.2 times of resin volume；When initial launch, resin need to be pre-processed, and reach maximum adsorption capacity, concrete scheme is such as
Under：1d is impregnated using 25%NaCl, pure water rinses 15min；10%HCl is used to impregnate 1d again, pure water is rinsed to neutrality；Using
10%NaOH impregnates 1d, and pure water is rinsed to conductivity≤400us/cm, and pretreatment finishes；
Cation exchange resin operating flux is 0.2m3/h；When the production full iron of water increases suddenly, show cation exchange resin
Saturation, need to be regenerated, regeneration technology is as follows：It is rinsed, is vented using 50L pure water；Using 30L 10-15% salt acid soaks
2h, emptying；30L 10-15% salt acid soak 2h, emptying are used again；Finally rinsed to colourless, the full iron ＜ of rinsing liquid using pure water
10mg/L, regeneration finish；
Through cold-rolling pickling wastewater recycling treatment process system of the present invention, pickling waste waters recycling treatment process Inlet and outlet water water
Matter situation such as following table：
Pickling waste waters recycling treatment process regenerated liquid water quality situation such as following table：
2. cold-rolling pickling wastewater recycling treatment process system as described in claim 1, which is characterized in that the cation
Exchange resin bed import connection acid solution delivery pump and pure water delivery pump, outlet connection regenerated liquid collecting box and exhausted bath box；
Exhausted bath box outlet conveys pumped back raw water box by waste water；
The regenerated liquid collecting box is exported is delivered to acid purification system by regenerated liquid delivery pump.
3. cold-rolling pickling wastewater recycling treatment process system as described in claim 1, which is characterized in that the acid solution case
Import connects pure water and salt acid treatment, and outlet connects cation exchange resin bed by acid solution delivery pump.
4. cold-rolling pickling wastewater recycling treatment process system as described in claim 1, which is characterized in that the pure water tank
Import connects pure water, and outlet connects cation exchange resin bed by pure water delivery pump.
5. cold-rolling pickling wastewater recycling treatment process system as described in claim 1, which is characterized in that the filtering
Device when filter inlet outlet pressure differential reaches limit value, is passed through compressed air or steam is cleaned using PVDF materials.
6. cold-rolling pickling wastewater recycling treatment process system as described in claim 1, which is characterized in that the pickling waste waters
In total oil≤1.0mg/L, suspended matter≤50mg/L, iron ion≤5000mg/L, acidity 0.5-2%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410235424.6A CN105293745B (en) | 2014-05-29 | 2014-05-29 | Cold-rolling pickling wastewater recycling treatment process system |
Applications Claiming Priority (1)
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| CN201410235424.6A CN105293745B (en) | 2014-05-29 | 2014-05-29 | Cold-rolling pickling wastewater recycling treatment process system |
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| CN105293745A CN105293745A (en) | 2016-02-03 |
| CN105293745B true CN105293745B (en) | 2018-08-31 |
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| CN105600997B (en) * | 2016-03-17 | 2018-07-10 | 广西钦州环科水处理有限公司 | A kind of processing method that waste liquid is generated to pickling of metal |
| CN109399834A (en) * | 2018-12-20 | 2019-03-01 | 上海振世能源科技有限公司 | A kind of steel rolling pickling waste waters recycling treatment system and its method |
| CN115520917B (en) * | 2021-10-27 | 2024-01-23 | 泰州威绿环保科技有限公司 | Wastewater pollution treatment system of stainless steel product centralized cleaning workshop |
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| JP2002322581A (en) * | 2001-04-25 | 2002-11-08 | Research Institute Of Innovative Technology For The Earth | Method for regenerating waste solution of nitric- hydrofluoric acid and method for pickling stainless steel |
| CN101597095A (en) * | 2008-06-05 | 2009-12-09 | 佳科太阳能硅(厦门)有限公司 | The recovery treatment method of waste acid of smelting silicon by wet process |
| CN201525888U (en) * | 2009-11-19 | 2010-07-14 | 上海宝钢设备检修有限公司 | Acid regenerating system for cold-rolling acid-washing waste acid containing iron ions |
| CN101723558B (en) * | 2009-12-04 | 2012-08-15 | 南京大学 | Integration method for electroplating acid pickle recycling and advanced waste treatment |
| CN201842708U (en) * | 2010-09-30 | 2011-05-25 | 杭州金枫叶科技有限公司 | Purifying device for online separation of metal salt and free acid in pickling solution |
| CN103241860A (en) * | 2013-04-27 | 2013-08-14 | 浙江晶泉水处理设备有限公司 | Combined treatment device and process for acid-washing wastewater of stainless steel |
| CN103539303A (en) * | 2013-11-15 | 2014-01-29 | 中冶华天工程技术有限公司 | Electroplating wastewater treating and recycling process and system |
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Effective date of registration: 20210104 Address after: 201900 Fujin Road, Baoshan District, Shanghai 885 Patentee after: BAOSHAN IRON & STEEL Co.,Ltd. Patentee after: Baowu Water Technology Co., Ltd Patentee after: WUHAN HUALIN TECHNOLOGY Co.,Ltd. Address before: 201900 Fujin Road, Baoshan District, Shanghai 885 Patentee before: BAOSHAN IRON & STEEL Co.,Ltd. Patentee before: BAOSTEEL ENGINEERING & TECHNOLOGY GROUP Co.,Ltd. Patentee before: WUHAN HUALIN TECHNOLOGY Co.,Ltd. |
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