CN209602315U - A kind of processing system of cold rolling wastewater - Google Patents
A kind of processing system of cold rolling wastewater Download PDFInfo
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- CN209602315U CN209602315U CN201822109077.9U CN201822109077U CN209602315U CN 209602315 U CN209602315 U CN 209602315U CN 201822109077 U CN201822109077 U CN 201822109077U CN 209602315 U CN209602315 U CN 209602315U
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Abstract
The utility model discloses a kind of processing systems of cold rolling wastewater, it includes for dense oil and the pretreated pretreatment system of emulsifying liquid waste water, and pretreatment system water outlet has been sequentially communicated the second conditioning tank, has neutralized flocculation tank, the 2nd pond CAF, the 2nd pond DAF, intermediate pool, heat exchanger, hydrolysis acidification pool, biological contact oxidation pond, inclined-plate clarifying basin, advanced oxidation pond and G-BAF processing pond；Second conditioning tank is equipped with thin oil waste water inlet.Present treatment system combines physico-chemical process and biochemical method, and using deep biochemical processing technique, effluent quality is unstable after solving existing cold rolling emulsion and oil-bearing wastewater processing, CODCr, oil, the index exceeding standards problem such as ammonia nitrogen；The system in combination of present treatment system is reasonable, and successive smooth, operating cost is lower, stable effluent quality.
Description
Technical field
The utility model relates to a kind of liquid waste disposal technique field, especially a kind of processing system of cold rolling wastewater.
Background technique
During Rolling production, in order to eliminate the deformation heat generated in rolling process and overcome frictional force, need to use
Emulsion or palm oil are cooled down and are lubricated to rolled pieces such as roll, roll bearings.In order to guarantee high added value belt steel rolling
When quality stablize, the relative molecular mass of oil emulsion is smaller and smaller in used emulsion, the composition of prepared emulsifier
Also it becomes increasingly complex, causes in cold rolling wastewater generated containing complicated ingredients such as emulsion, lubricant, surfactants.This
Kind cold rolling wastewater has the characteristics that interim discharge amount is big, change of water quality amplitude is big, chemical stability is good, biodegradability is poor, is
The maximum a kind of waste water of processing difficulty in oily waste water system.As country pays more attention to industry energy conservation environmental protection, by steel
After all kinds of waste water in production are handled reuse become a kind of inexorable trend, while be also steel industry development faced compel
It is essential and asks.
Currently, the processing method of domestic steel mill's cold rolling emulsion and oil-bearing wastewater mainly chemically based on, and be aided with
Biochemical reaction mostly uses greatly ultrafiltration apparatus+aerobe technique, the disadvantage is that the removal rate to organic pollutant is low, operation pipe
Manage it is costly, and be discharged be not easy it is up to standard.The Membrane Bioreactor for Wastewater Treatment device being gradually introduced in recent years, equally exists film and is not easy
Cleaning, easy the disadvantages of being contaminated.The main reason for above problem is biodegradable highly concentrated containing being not easy in emulsifying liquid waste water
Organic matter and high concentration oil are spent, single aerobe method is difficult to effectively remove the organic matter in waste water, however membrane technology
There is also investment operating costs in practical applications it is high, resistance tocrocking is poor, film frequent jams the problems such as, and for chemical oxygen demand
Measure (Chemical Oxygen Demand, CODCr) processing still do not reach ideal effect.
Utility model content
In view of above-mentioned the shortcomings of the prior art, that the purpose of this utility model is to provide a kind for the treatment of effects is stable,
The processing system for the cold rolling wastewater that production run is at low cost, operation operation is easy.
To achieve the goals above, technical solution adopted in the utility model is as follows: it includes for dense oil and emulsification
The pretreatment system of liquid Wastewater Pretreatment, pretreatment system water outlet have been sequentially communicated the second conditioning tank, have neutralized flocculation tank, second
The pond CAF, the 2nd pond DAF, intermediate pool, heat exchanger, hydrolysis acidification pool, biological contact oxidation pond, inclined-plate clarifying basin, advanced oxidation
Pond and G-BAF processing pond；Second conditioning tank is equipped with thin oil waste water inlet.
Pretreatment system described in Tthe utility model system is successively by the first conditioning tank, demulsification pond, oil separator, the first pond CAF
It is connected to the first pond DAF.
First conditioning tank, oil separator described in Tthe utility model system and the second conditioning tank are equipped with Oil and slag scraping machine；It is pushing up
Portion is equipped with floating oil collecting pipeline, and bottom is equipped with sediment area, and sediment area is communicated with sludge concentration tank by pipeline and pump.
The top in the first pond CAF, the first pond DAF described in Tthe utility model system, the 2nd pond CAF and the 2nd pond DAF is equipped with
Frizing mud scraper, frizing mud scraper pipeline connection have sludge concentration tank.
Sloping plate deposition bottom of pond portion described in Tthe utility model system is communicated with can be by sludge reflux to biological contact oxidation pond
Pipeline and pump.
The utility model is due to using above technical scheme, and have significant technical effect: the utility model is by materialization
Method and biochemical method combine, and using deep biochemical processing technique, go out after solving existing cold rolling emulsion and oil-bearing wastewater processing
Water water quality is unstable, CODCr, oil, the index exceeding standards problem such as ammonia nitrogen.The utility model solve cold rolling oil-containing waste water water it is uneven,
The technical issues of factors bring overall crafts such as change of water quality amplitude is big, chemical stability is bad are unable to stable operation；Pass through
Hydrolysis acidification-bio-contact oxidation-advanced oxidation collaboration processing effect, anaerobic-aerobic-ozonation technology is organic
Combine, substantially increase resistance to high organic loading, the impact capacity of system, make be discharged SS, CODCr, the indexs such as oil continue surely
Surely reach the existing emission limit of GB13456-2012.The system in combination of the utility model is reasonable, successive smooth, operating cost
It is lower, stable effluent quality.
Detailed description of the invention
Fig. 1 is the flowage structure schematic diagram of the utility model；
Fig. 2 is the structural schematic diagram of the utility model.
In figure: the first conditioning tank 1, steam(-)coil 2, temperature monitor 3, Oil and slag scraping machine 4, sediment area 5, elevator pump
6, acid adding mixer 7, demulsification pond 8, pH detector 9, wind agitating device 10, oil separator 11, Oil and slag scraping machine 12, sediment area 13,
First pond CAF 14, wind agitating device 15, Cavltation aerator 16, frizing mud scraper 17, the first pond DAF 18, frizing mud scraper 19,
Pressure air-dissolving release device 20, the second conditioning tank 21, Oil and slag scraping machine 22, sediment area 23, elevator pump 24, homogeneous reflux line
25, flocculation tank 26, pH detector 27, agitating device 28, chemicals dosing plant 29, the 2nd pond CAF 30, wind agitating device 31, whirlpool are neutralized
Recessed aerator 32, frizing mud scraper 33, the 2nd pond DAF 34, frizing mud scraper 35, pressure air-dissolving release device 36, intermediate pool
37, agitating device 38, chemicals dosing plant 39, elevator pump 40, heat exchanger 41, hydrolysis acidification pool 42, water-distributing device 43, biological contact oxidation
Change pond 44, aerator 45, pH detector 46, temperature monitor 47, dissolved oxygen detector 48, inclined-plate clarifying basin 49, advanced oxidation
Pond 50, elevator pump 51, G-BAF processing pond 52, water distributor and gas pipe 53, produce pond 55, reuse pool 56 at back washing device 54.
Specific embodiment
Fig. 1, shown in 2, the processing system of this cold rolling wastewater includes pretreatment system, and the pretreatment system is used for dense
Oil and emulsifying liquid waste water are pre-processed, and are successively connected to by following apparatus: the first conditioning tank 1, demulsification pond 8, oil separator
11, the first pond CAF 14(cavitation air flotation pond, Cavitation Air Flotation) and the first pond DAF 18(air-dissolving air-float pond,
Dissolved Air Flotation system).First conditioning tank 1 is equipped with dense oil and emulsifying liquid waste water entrance, the
It is equipped with heating coil 2 and temperature monitor 3 in one conditioning tank 1, is used for heating and thermal insulation；The import of the heating coil 2 and steam
Conveyance conduit connection, outlet are connect with condensation water collection pipeline；Oil and slag scraping machine 4 is equipped with for scraping on 1 top of the first conditioning tank
It removes oil slick, be equipped with floating oil collecting pipeline for conveying floating oil collecting at top；Sediment area 5 is equipped in 1 bottom of the first conditioning tank
For collecting sediment, sediment is pumped into sludge concentration tank by being promoted.First conditioning tank 1 is demulsified by elevator pump 6 and pipeline connection
Pond 8 is equipped with pH detector 9 in pond 8 equipped with acid adding mixer 7, demulsification in the inlet ductwork in demulsification pond 8, for adjusting pH value
To carry out acid out demulsification reaction；Demulsification 8 bottom of pond is additionally provided with wind agitating device 10.Oil and slag scraping machine is equipped in the oil separator 11
12 are used to convey floating oil collecting for scraping off oil slick, being equipped with floating oil collecting pipeline at top；Bottom is equipped with sediment area 13 and is used for
Sediment is collected, sediment is pumped into sludge concentration tank by being promoted.The inlet pipeline in the first pond CAF 14 is equipped with chemicals dosing plant, In
Cavltation aerator 16 is equipped in first pond CAF 14, bottom is equipped with wind agitating device 15；First pond CAF 14 is additionally provided with frizing and scrapes mud
Machine 17, to scrape suspended matter, the suspended matter scraped is sent into sludge concentration tank.First pond DAF 18 is equipped with pressure air-dissolving
Release device 20 and frizing mud scraper 19；The suspended matter that frizing mud scraper 19 scrapes is sent into sludge concentration tank.Described first adjusts
Save pond 1, the oil slick of oil separator 11 enters oil removing pot outward transport through floating oil collecting pipeline；Sludge in sludge concentration tank after concentration is through plate
Frame filter press filters pressing is transported outward at mud cake.
Fig. 1, shown in 2, pretreatment system described in the processing system of this cold rolling wastewater has been sequentially communicated following apparatus: second adjusts
Save pond 21, neutralize flocculation tank 26, the 2nd pond CAF 30, the 2nd pond DAF 34, intermediate pool 37, heat exchanger 41, hydrolysis acidification pool 42,
Biological contact oxidation pond 44, inclined-plate clarifying basin 49, advanced oxidation pond 50 and G-BAF processing pond 52.Second conditioning tank 21 with
The outlet pipeline in the first pond DAF 18 is connected to, and for receiving the dense oily and pretreated waste water of emulsifying liquid waste water, (the first pond DAF goes out
Water)；Thin oil waste water inlet is equipped on the second conditioning tank 21, such first pond DAF water outlet is with thin oil waste water in the second conditioning tank
Homogeneous mixing, forms oily waste water；Oil and slag scraping machine 22 is equipped in second conditioning tank 21 for scraping off oil slick, setting at top
There is floating oil collecting pipeline for conveying floating oil collecting, is additionally provided with sediment area 23 for collecting sediment, sediment is pumped by being promoted
Sludge concentration tank；The outlet pipeline of second conditioning tank 21 is connected with elevator pump 24 and homogeneous reflux line 25, homogeneous reflux line
25 are used for the effluent recycling of the second conditioning tank 21 to the second conditioning tank 21, to make two kinds of water inlets mixing more homogeneous.Second adjusts
Section pond 21 is connected to elevator pump 24 by outlet pipeline and neutralizes flocculation tank 26；It neutralizes and is equipped with pH detector 27 in flocculation tank 26, stirs
Mix device 28 and chemicals dosing plant 29；Dosing coagulant, flocculant make useless Organic substance in water, suspended matter generate floc sedimentation, improve flocculation
Effect.2nd pond CAF 30 is equipped with Cavltation aerator 32, bottom is equipped with wind agitating device 31；2nd pond CAF 30, which is additionally provided with, scrapes
Oily mud scraper 33, to scrape suspended matter, the suspended matter scraped is sent into sludge concentration tank.2nd pond DAF 34, which is equipped with, to be added
Pressure solution gas release device 36 and frizing mud scraper 35, the suspended matter that frizing mud scraper 35 scrapes are sent into sludge concentration tank.In described
Between pond 37 be equipped with agitating device 38 and chemicals dosing plant 39, be used for chemicals addition control pH value.The intermediate pool 37 by pipeline and
Elevator pump 40 is connected to heat exchanger 41, and the heat exchanger 41 is plate heat exchanger.Soft biological is equipped in the hydrolysis acidification pool 42
Bridging, biological material hanging provide place of living away from home for microorganism；It is additionally provided with water-distributing device 43,42 water inlet pipe of hydrolysis acidification pool and water distribution fill
43 connections are set, will be intake by water-distributing device 43 from acidification bottom of pond portion release, and averagely be covered with entire acidification pool.The biological
Oxidation pond 44 is for carrying out the good nutrient solution of biology；Its bottom is equipped with aerator 45 for providing aerobic biochemical reaction requisite oxygen
Gas, top are equipped with pH detector 46, temperature monitor 47 and dissolved oxygen detector 48.The bottom of the inclined-plate clarifying basin 49 is equipped with dirt
Mud reflux pump, can be by sludge reflux to biological contact oxidation pond 44.The advanced oxidation pond 50 will be difficult by ozonation technology
Degradation of organic substances is degraded to small-molecule substance.The advanced oxidation pond 50 is connected to G-BAF processing pond with elevator pump 51 by pipeline
52；52 bottom of G-BAF processing pond is equipped with water distributor and gas pipe 53, is reacted by the high-effective microorganism aerobic/anaerobic of inoculation, will
The small organic molecule and ammonia nitrogen that traditional biological method cannot degrade further remove.The pond G-BAF 52 is discharged overflow and enters to produce pond
55, water quality is detected producing pond 55, tank water is produced when water quality reaching standard and enters reuse pool 56, can discharge or produce back
With；It is pumped into intermediate pool 37 by being promoted when not up to standard and is handled again.Also connect in G-BAF processing pond 52 and the bottom for producing pond 55
It is connected with pipeline and back washing device 54, according to the regular backwash of the indexs such as aqueous suspension, turbidity out, prevents pond inner stuffing-PET polyester
It is sliced pore plugging, guarantees outlet effect.The oil slick of second conditioning tank 21 enters oil removing pot outward transport through floating oil collecting pipeline；Sludge
Sludge in concentration basin after concentration is transported outward through plate and frame filter press filters pressing at mud cake.
Fig. 1, shown in 2, the processing system of this cold rolling wastewater is divided into dense oil and emulsion is useless according to the property of cold rolling wastewater
Water and thin oil waste water；After dense oil and the preprocessed system of emulsifying liquid waste water are pre-processed, in the second conditioning tank 21 and thin oil
Subsequent processing is carried out after waste water mixing；Specific treatment process is as described below:
(1) dense oil and emulsifying liquid waste water enter the first conditioning tank 1, using steel rolling mill's low-pressure residual heat steam through steam heating dish
Pipe 2 controls temperature at 55~60 DEG C, keeps mobility oily in waste water, avoids the generation of saponification.Since the density of oil is small
In the density of water, grease not soluble in water swims in water layer or more, is scraped upper layer grease into floating oil collecting by Oil and slag scraping machine 4
Pipeline, sediment enter sediment area 5.The water outlet of first conditioning tank 1 is sent into demulsification pond 8 by elevator pump 6, due to the oil droplet pole of oil emulsion
Small, surface easily forms the limitans with charge, and oil droplet periphery forms electric double layer, keeps oil droplet mutually exclusive extremely difficult close, in power
There is certain stability on.Sulfuric acid, hydrochloric acid or the nitric acid of steel rolling mill's recycling are added in acid adding mixer 7, controls pH=3~5,
Emulsifying liquid waste water carries out acid out demulsification reaction, and oil emulsion is precipitated, and the water outlet of demulsification pond 8 enters oil separator 11 and removes sediment, oil slick.
(2) water outlet of oil separator 11 flows into the first pond CAF 14, the first pond DAF 18, the first pond CAF 14 by pipeline sequence
Water inlet pipe be equipped with chemicals dosing plant, add bodied ferric sulfate (Polymerized Ferrous Sulfate, PFS), polyacrylamide
Amine (Polyacrylamide, PAM), to improve flocculating effect, by the Cavltation aerator 16 in the first pond CAF 14, the first pond DAF
The two-stage air-flotation process of 18 pressure air-dissolving release device 20, to separate the most oil of removal, organic matter and suspended particulate.
The water outlet in the first pond DAF 18 enters the second conditioning tank 21.
(3) (water outlet in the first pond DAF 18) and thin oil waste water are discharged with 1:3~5 after dense oil and emulsifying liquid waste water pretreatment
Flow-rate ratio is mixed in the second conditioning tank 21, forms oily waste water, by elevator pump 24 after Oil and slag scraping machine 22 removes oil slick, sediment
It is promoted, is sent into after homogeneous reflux line 25 carries out homogeneous mixing and neutralizes flocculation tank 26, dosing coagulant, flocculant make in waste water
Organic matter generates wadding body, and suspended matter aggregation becomes larger or formed floc sedimentation, is convenient for subsequent air-flotation process.Because coagulant is electrolyte,
Micelle is formed in waste water, and charge neutrality occurs with the colloidal substance in waste water and forms wadding body, can not only remove thin in waste water
Small suspended particulate, but also coloration, oil, heavy metal and organic matter can be removed etc..Used coagulant is PFS, is thrown
Dosage is 5mg/L~200mg/L；Flocculant is PAM, and dosage is 0.1mg/L~2.5mg/L.It is logical to neutralize the water outlet of flocculation tank 26
It crosses gravity stream and sequentially enters the 2nd pond CAF 30 and the 2nd pond DAF 34.
" microbubble " is directly injected into waste water by (4) the 2nd ponds CAF 30 by Cavltation aerator 32, these microbubbles are attached
On wadding body or large particle, float and maintain to swim in the water surface, using frizing cleaning shoe 33 scrape into pipe gravity flow pipeline enter
Sludge concentration tank.The water outlet of 2nd pond CAF 30 carries out secondary air-flotation process, pressure air-dissolving release device from the 2nd pond DAF 34 is flowed into
36 into flotation tank inject diameter≤30 μm micro-bubble, by micro-bubble adhere to waste water in hydrophobic grouping solid or
Little particle oil droplet, particle forms wadding body of the apparent density less than water and rises to surface after adhering to bubble, by frizing cleaning shoe
35 scrape and enter sludge concentration tank into pipe gravity flow pipeline.
The water outlet of (5) the 2nd ponds DAF 34 enters intermediate pool 37, adjusts pH=6~8, intermediate pool 37 by chemicals dosing plant 39
Water outlet is sent into hydrolysis acidification pool 42 after the cooling of plate heat exchanger 41 by elevator pump 40；Soft biological is equipped in hydrolysis acidification pool 42
Bridging, biological material hanging provide place of living away from home for microorganism.Pretreatment stage of the hydrolysis acidification technique as biological section, passes through micro- life
Insoluble hydrolysis of organic matter is dissolved organic matter by object effect, is small-molecule substance by long-chain macromolecule mass degradation, is reduced
Subsequent technique handles the time, has good removal to suspended matter and organic matter, reduces subsequent aerobic process sludge output, improves resistance to
Impact load.
(6) hydrolysis acidification pool 42, which is discharged overflow and enters biological contact oxidation pond 44, carries out the good nutrient solution of biology；Biology connects
Touching oxidation pond 44 is a kind of bio membrane process between activated sludge process and biofilter, its main feature is that setting inside pond
There is biologic packing material, provides place of living away from home for microorganism；PH=6~8 in pond are controlled by pH detector 46, temperature monitor 47 is controlled
At 20~35 DEG C, bottom of pond portion is equipped with aerator 45 and is oxygenated to waste water temperature processed, keeps dissolved oxygen (Dissolved in pond
Oxygen, Do) it is 2~5mg/L, air water volume ratio is 15~20:1, and waste water in pond is made to be in flow regime.By the useless of aeration
Water flows through packing layer, waste water and biofilm contact, under biofilm microorganisms effect, removes most of organic matter, a small amount of oil
With ammonia nitrogen etc..The water outlet of biological contact oxidation pond 44 flows by gravitational force into inclined-plate clarifying basin 49 and is precipitated, clarified, separated, inclined plate
49 bottom of sedimentation basin is equipped with sludge lifting pump, sludge reflux to biological contact oxidation pond 44, sludge reflux can be made micro- life
The multiplication of object quantity, increases the ability of its biochemical treatment ability and anti impulsion load, and excess sludge is sent into sludge concentration tank.
(7) water outlet of inclined-plate clarifying basin 49 flows by gravitational force into advanced oxidation pond 50；Advanced oxidation pond 50 uses ozone
The gas source of oxidation technology, ozone generator is air, and the ozone of generation is entered in advanced oxidation pond 50 by ozone pipeline, by smelly
Oxygen diffuser diffuses to entire catalytic reaction chamber, is directly reacted using ozone with organic matter, or is decomposed and produced using ozone
Organic matter degradation difficult to degrade is small-molecule substance by the extremely strong hydroxyl radical free radical OH of liveliness proof.The ozone not utilized finally
It is eliminated by ozone quencher, passes through gas outlet safety dumping.
(8) water outlet of advanced oxidation pond 50 is sent into the pond G-BAF 52 by elevator pump 51, and the pond G-BAF 52 is using modified aeration life
Object filter tank structure, 52 bottom of the pond G-BAF are provided with water distributor and gas pipe 53, fill bottle-grade polyester chip in pond
(Polyethylene terephthalate, PET) is reacted by the high-effective microorganism aerobic/anaerobic of inoculation, and tradition is raw
The small organic molecule and ammonia nitrogen that object method cannot degrade further remove.The pond G-BAF 52 is discharged overflow and enters to produce pond 55, is producing pond
55 pairs of water quality detect, and tank water is produced when water quality reaching standard and flows by gravitational force into reuse pool 56, is pumped when not up to standard by being promoted
Enter intermediate pool 37 to handle again.
(9) first conditioning tanks 1, oil separator 11, the second conditioning tank 21 oil slick scrape through Oil and slag scraping machine into floating oil collecting pipe
Road proceeds to oil removing pot outward transport；First conditioning tank 1, oil separator 11, the second conditioning tank 21 sediment be pumped into sludge condensation by being promoted
Pond；First pond CAF 14, the first pond DAF 18, the 2nd pond CAF 30, the suspended matter in the 2nd pond DAF 34 are dirty through the inflow of frizing cleaning shoe
Mud thickener；Sludge after sludge concentration tank concentration is transported outward through plate and frame filter press filters pressing at mud cake.
(10) 1 is shown in Table using the data of the cold rolling wastewater of present treatment system before and after the processing.
Table 1: the data of cold rolling wastewater before and after the processing
Seen from table 1, present treatment system effectively removes the COD in waste waterCr, oil, SS, ammonia nitrogen etc., effluent index is held
It is continuous to stably reach the existing emission limit of GB13456-2012.
Claims (5)
1. a kind of processing system of cold rolling wastewater, it is characterised in that: it includes pretreated pre- for dense oil and emulsifying liquid waste water
Processing system, pretreatment system water outlet be sequentially communicated the second conditioning tank, neutralize flocculation tank, the 2nd pond CAF, the 2nd pond DAF, in
Between pond, heat exchanger, hydrolysis acidification pool, biological contact oxidation pond, inclined-plate clarifying basin, advanced oxidation pond and G-BAF processing pond；Institute
The second conditioning tank is stated equipped with thin oil waste water inlet.
2. a kind of processing system of cold rolling wastewater according to claim 1, it is characterised in that: the pretreatment system is successively
It is connected to by the first conditioning tank, demulsification pond, oil separator, the first pond CAF with the first pond DAF.
3. a kind of processing system of cold rolling wastewater according to claim 2, it is characterised in that: first conditioning tank, every
Oil sump and the second conditioning tank are equipped with Oil and slag scraping machine；It is equipped with floating oil collecting pipeline at top, bottom is equipped with sediment area, sinks
Slag area is communicated with sludge concentration tank by pipeline and pump.
4. a kind of processing system of cold rolling wastewater according to claim 2, it is characterised in that: the first pond CAF, first
The top in the pond DAF, the 2nd pond CAF and the 2nd pond DAF is equipped with frizing mud scraper, and frizing mud scraper pipeline connection has sludge condensation
Pond.
5. a kind of processing system of cold rolling wastewater according to any one of claims 1-4, it is characterised in that: described oblique
Plate precipitating bottom of pond portion is communicated with can be by the pipeline and pump of sludge reflux to biological contact oxidation pond.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109650648A (en) * | 2018-12-16 | 2019-04-19 | 邯郸钢铁集团有限责任公司 | A kind of processing system and method for cold rolling wastewater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109650648A (en) * | 2018-12-16 | 2019-04-19 | 邯郸钢铁集团有限责任公司 | A kind of processing system and method for cold rolling wastewater |
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