CN105217826B - A kind of cold rolling wastewater advanced treatment system and processing method - Google Patents
A kind of cold rolling wastewater advanced treatment system and processing method Download PDFInfo
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Abstract
The present invention provides a kind of cold rolling wastewater advanced treatment system, the processing system is sequentially connected plasma nanometer air-floating apparatus, ultrafiltration circulating box, inorganic ultra-filtration device, ultrafiltration production pond, cationic ion-exchange resin device, degassing tower, anion exchange resin device and final water producing tank by pipeline；The inorganic ultra-filtration device is also connected with ultrafiltration rinse bath；The plasma nanometer air-floating apparatus includes low-temperature plasma generator, the low-temperature plasma generator is connected by multiphase flow water pump with dissolving, the dissolving is connected with micro-nano air supporting release head, and Slag Scraping Device is also set up on the top of the plasma nanometer air-floating apparatus.The present invention reduces ton steel and consumes new water index, and treatment effect is stable, production run cost is low, operation operation is easy, and effluent quality can reach industry water water quality index, reach waste water recycling purpose.
Description
Technical field
The invention belongs to water-treatment technology field, and in particular to a kind of steel industry cold rolling waste discharge advanced treatment system
And processing method.
Background technology
The specific requirement proposed according to national " steel industry development policies " to new water index, steel is combined before the year two thousand twenty
It is 6m that enterprise's ton steel, which consumes new water index,3/t.Wherein, it is desirable to which large enterprise's ton steel consumption of 10,000,000 tons of steel of newly-built annual output and the above is new
Water index≤4.0m3/t；It is built to produce 10000000 tons of steel and the integrated iron and steel works new water index≤5.0m of ton steel consumption of the above per year3/t。
Sewage advanced treatment and recycle by be following wastewater treatment development trend.
Cold rolling wastewater species is various, mainly including emulsifying liquid waste water, dense oily highly basic waste water, leveling precision waste water, thin oil weak base
Waste water, acid waste water, chromate waste water etc..Final waste discharge refers to that above-mentioned all waste water are adjusted by oil removing, pH, aoxidized, also
Waste water after the processing of the conventional processes such as original, coagulating sedimentation, biochemistry, waste water quality situation are as follows：CODcr20-60mg/L, electrical conductivity
2500-6000us/cm, suspension 5-20mg/L, basicity 20-150mg/L, chlorion 600-1200mg/L, sulfate radical 100-
600mg/L, calcium hardness 1000-3000mg/L, magnesium hardness 50-300mg/L, total iron 0.02-2mg/L.
The technique of advanced treating is more, such as ion-exchanger, electrodialysis (ED), electrodeionization exchanger (EDI), Electro Sorb
(EST), counter-infiltration, nanofiltration, distillation etc..At present, Sewage advanced treatment engineering uses reverse osmosis process mostly, but counter-infiltration is to entering
The requirement of water is higher, it is desirable to which influent quality index is as follows：SDI≤5, COD≤30mg/L, oils≤0.1mg/L, chlorine residue≤
0.1mg/L.And the final waste discharge water quality of cold rolling is complex, it is difficult to meet reverse osmosis requirement, so as to influence counter-infiltration
The service life of film.In addition, final waste discharge Ca2+、Mg2+And silicon ion content is higher, it is dirty stifled tight to easily cause reverse osmosis membrane
Weight, needs frequent clean.Also there is part engineering using Electro Sorb as advanced treatment process, such as patent of invention《Cold rolling wastewater depth
Treatment for reuse system》(number of patent application：200810207227.8) described, cold rolling wastewater is by traditional pH adjustment, coagulation, gas
Electro Sorb deep desalting is passed through in water outlet after floating, Two-Stage Biochemical, water outlet CODcr≤70mg/L, total oil≤5mg/L, and suspension≤
5mg/L, electrical conductivity≤1500mg/L.Though this Process for Effluent electrical conductivity decreases, industry water water quality requirement is unable to reach, no
Recirculating cooling water system moisturizing can be used as.
The content of the invention
In order to solve the above problems, it is an object of the invention to provide a kind of cold rolling wastewater advanced treatment system and processing side
Method, reduce ton steel and consume new water index, treatment effect is stable, production run cost is low, operation operation is easy, and effluent quality can reach
Industry water water quality index, reach waste water recycling purpose.
The technical solution of the present invention is as follows：
A kind of cold rolling wastewater advanced treatment system, the processing system are sequentially connected the air supporting of plasma nanometer by pipeline and filled
Put, ultrafiltration circulating box, inorganic ultra-filtration device, ultrafiltration production pond, cationic ion-exchange resin device, degassing tower, anion exchange tree
Fat device and final water producing tank；The inorganic ultra-filtration device is also connected with ultrafiltration rinse bath；The plasma nanometer air-floating apparatus
Including low-temperature plasma generator, the low-temperature plasma generator is connected by multiphase flow water pump with dissolving, the molten gas
Tank is connected with micro-nano air supporting release head, and Slag Scraping Device is also set up on the top of the plasma nanometer air-floating apparatus.
According to cold rolling wastewater advanced treatment system of the present invention, it is preferred that the cationic ion-exchange resin device bag
Include entering for cation bed HL-1 and cation bed HL-2, cation bed HL-1 connections the cation bed HL-2, cation bed HL-2 delivery port connection degassing tower
Mouthful；The outlet connection anion exchange resin device of the degassing tower, the anion exchange resin device include anion bed HL-3
With anion bed HL-4, the anion bed HL-3 connections anion bed HL-4, anion bed HL-4 outlet connect final water producing tank.
According to cold rolling wastewater advanced treatment system of the present invention, it is preferred that the cation bed HL-1 is built-in to be used to adsorb
The highly acidic resin of calcium ion and magnesium ion, the built-in highly acidic resins for being used for Liquidity limit of the cation bed HL-2；Described the moon
The built-in basic resins for being used for adsorbing chloride ions of bed HL-3, anion bed HL-4 is built-in to be used for adsorpting anion basic resin.
According to cold rolling wastewater advanced treatment system of the present invention, it is preferred that the entrance A of the cation bed HL-1 passes through acid
Liquid delivery pump is connected with for the acid solution case of counter-current regeneration, and the entrance A of the cation bed HL-1 is also by pure water delivery pump with being used for
The pure water tank connection of counter-current regeneration；The cation bed HL-1 is connected with cation bed HL-2, for making the acid solution and pure water pass through cation bed
Enter cation bed HL-2 after HL-1, cation bed HL-2 water outlet B is connected with exhausted bath box.
According to cold rolling wastewater advanced treatment system of the present invention, it is preferred that the entrance C of the anion bed HL-3 passes through alkali
Liquid delivery pump is connected with for the lye tank of counter-current regeneration, and the entrance C of the anion bed HL-3 is also by pure water delivery pump with being used for
The pure water tank connection of counter-current regeneration；The anion bed HL-3 is connected with anion bed HL-4, for making the alkali lye and pure water pass through anion bed
Enter anion bed HL-4 after HL-3, anion bed HL-4 delivery port D is connected with exhausted bath box.
According to cold rolling wastewater advanced treatment system of the present invention, it is preferred that using pottery in the inorganic ultra-filtration device
Porcelain membrane tube, the ultrafiltration aperture of the ceramic-film tube are no more than 50nm.
A kind of cold rolling wastewater deep treatment method of the present invention, the described cold rolling wastewater advanced treating system of methods described application
System, comprises the following steps：
(1) cold rolling wastewater enters plasma nanometer air-floating apparatus, and the plasma of the plasma nanometer air-floating apparatus occurs
Device produces the gas with hydroxyl radical free radical and ozone, then is delivered to cold rolling wastewater by micro-nano air supporting release head, makes hydroxyl
Free radical and ozone are fully contacted with Pollutants in Wastewater and oxidation reaction occur, and pollutant is oxidized into CO2, water or salt；Separately
On the one hand the mixed gas and water of hydroxyl radical free radical and ozone are sucked molten gas by micro-nano air supporting release head by multiphase flow water pump
In tank, release head rotates under the motive force of High-Pressure Water, air pocket is cut into micro-nano bubble, the impurity in waste water is micro-
Minute bubbles are brought to be scraped to scum trough to the water surface by Slag Scraping Device, and then waste water enters ultrafiltration circulating box, the waste water warp in ultrafiltration circulating box
Ultrafiltration circulating pump, into inorganic ultra-filtration device, the inorganic ultra-filtration device uses big cross-flow filtration form, and production water produces into ultrafiltration
Pond, concentrate recirculation caused by inorganic ultra-filtration device to ultrafiltration circulating box；
(2) after the cation that the waste water in ultrafiltration production pond is removed in waste water through entering cationic ion-exchange resin device, enter
Enter and deaerated in degassing tower degassing, the anion entered back into anion exchange resin device removal waste water, after removing anion
Waste water enters final water producing tank.
According to cold rolling wastewater deep treatment method of the present invention, it is preferred that work as ion exchange resin in step (2)
, need to be to ion exchange resin regeneration during electrical conductivity >=400mg/L of device water outlet.
According to cold rolling wastewater deep treatment method of the present invention, it is preferred that the cationic ion-exchange resin device
Cation bed HL-1 and cation bed HL-2 is regenerated using counter flow in series, and it is that mass percentage content is 5%-10%'s to regenerate the medicament used
Hydrochloric acid, the dosage of regenerative agent are 2 times of resin volume；The anion exchange resin device anion bed HL-3 and anion bed HL-4 are used
Counter flow in series regenerates, and the medicament that uses of regenerating is the sodium hydroxide that mass percentage content is 5-10%, the use of regenerative agent
Measure the resin volume for 2 times.
According to cold rolling wastewater deep treatment method of the present invention, it is preferred that enter ultrafiltration after step (1) processing
Produce pond waste water：Total oil≤1.0mg/L, suspension≤10mg/L, CODcr≤30mg/L.
According to cold rolling wastewater deep treatment method of the present invention, the processing system is sequentially connected plasma by pipeline
Nanometer air-floating apparatus, ultrafiltration circulating box, inorganic ultra-filtration device, ultrafiltration production pond, cationic ion-exchange resin device, degassing tower, the moon
Di and final water producing tank；The inorganic ultra-filtration device is also connected with ultrafiltration rinse bath；The plasma is received
Rice air-floating apparatus includes low-temperature plasma generator, and the low-temperature plasma generator is connected by multiphase flow water pump and dissolving
Connect, the dissolving is connected with micro-nano air supporting release head, is also set up on the top of the plasma nanometer air-floating apparatus and is scraped slag
Machine.
According to cold rolling wastewater deep treatment method of the present invention, it is preferred that the cationic ion-exchange resin device bag
Include entering for cation bed HL-1 and cation bed HL-2, cation bed HL-1 connections the cation bed HL-2, cation bed HL-2 delivery port connection degassing tower
Mouthful；The outlet connection anion exchange resin device of the degassing tower, the anion exchange resin device include anion bed HL-3
With anion bed HL-4, the anion bed HL-3 connections anion bed HL-4, anion bed HL-4 outlet connect final water producing tank.
According to cold rolling wastewater deep treatment method of the present invention, it is preferred that the cation bed HL-1 is built-in to be used to adsorb
The highly acidic resin of calcium ion and magnesium ion, the built-in highly acidic resins for being used for Liquidity limit of the cation bed HL-2；Described the moon
The built-in basic resins for being used for adsorbing chloride ions of bed HL-3, anion bed HL-4 is built-in to be used for adsorpting anion basic resin.
According to cold rolling wastewater deep treatment method of the present invention, it is preferred that the entrance A of the cation bed HL-1 passes through acid
Liquid delivery pump is connected with for the acid solution case of counter-current regeneration, and the entrance A of the cation bed HL-1 is also by pure water delivery pump with being used for
The pure water tank connection of counter-current regeneration；The cation bed HL-1 is connected with cation bed HL-2, for making the acid solution and pure water pass through cation bed
Enter cation bed HL-2 after HL-1, cation bed HL-2 water outlet B is connected with exhausted bath box.
According to cold rolling wastewater deep treatment method of the present invention, it is preferred that the entrance C of the anion bed HL-3 passes through alkali
Liquid delivery pump is connected with for the lye tank of counter-current regeneration, and the entrance C of the anion bed HL-3 is also by pure water delivery pump with being used for
The pure water tank connection of counter-current regeneration；The anion bed HL-3 is connected with anion bed HL-4, for making the alkali lye and pure water pass through anion bed
Enter anion bed HL-4 after HL-3, anion bed HL-4 delivery port D is connected with exhausted bath box.
According to cold rolling wastewater deep treatment method of the present invention, it is preferred that using pottery in the inorganic ultra-filtration device
Porcelain membrane tube, the ultrafiltration aperture of the ceramic-film tube are no more than 50nm.
The present invention using ion exchange resin progress the final waste discharge advanced treating of cold rolling process system, including etc. from
Sub- nanometer air-floating apparatus, inorganic ultra-filtration device, ultrafiltration circulating box, ultrafiltration circulating pump, ultrafiltration rinse bath, ultrafiltration production pond, resin
Supply-water pump, cationic ion-exchange resin, degassing tower, decarburization blower fan, middle water pump, anion exchange resin, final water producing tank, produce water
Send pump, acid solution case, acid solution delivery pump, lye tank, alkali lye delivery pump, pure water tank, pure water delivery pump, exhausted bath box and waste liquid conveying outside
Pump.
The plasma nanometer air-floating apparatus includes low-temperature plasma generator, multiphase flow water pump, dissolving, micro-nano gas
Floating release head and Slag Scraping Device, upper inlet connect final waste discharge, and outlet connects ultrafiltration circulating box；Described ultrafiltration circulating box outlet
Ultrafiltration circulating pump is connect, reconnects inorganic ultra-filtration device；Described inorganic ultra-filtration device outlet connection ultrafiltration circulating box, outlet also connects
Connect ultrafiltration production pond；Described ultrafiltration production basin outlet connects resin supply-water pump, then connects cationic ion-exchange resin device；Described sun
Di includes 2 cation beds (HL-1, HL-2), and HL-1 cation beds connect HL-2 cation beds, and HL-2 cation bed water outlets connect degassing
Tower；Described degassing tower import also connects decarburization blower fan, and outlet connects anion exchange resin device by middle water pump；Described the moon
Di includes 2 anion beds (HL-3, HL-4), and HL-3 anion beds connect HL-4 anion beds again, and the outlet of HL-4 anion beds connects most
Whole water producing tank.Pump is sent outside by producing water and is delivered to industrial grid in described final water producing tank outlet
Described ultrafiltration cleaning case import connection cleaning agent, industrial grid and steam pipe system, outlet connects ultrafiltration circulation
Pump, then connect inorganic ultra-filtration device；The outlet of inorganic ultra-filtration device connects ultrafiltration cleaning case.
Described cationic ion-exchange resin device, HL-1 cation beds are also connected with acid solution delivery pump and pure water delivery pump, and outlet connects
HL-2 cation beds are connect, the outlet of HL-2 cation beds connects exhausted bath box；Described anion exchange resin device, HL-3 anion beds also connect alkali lye conveying
Pump and pure water delivery pump, outlet connection HL-4 anion beds, the outlet of HL-4 anion beds connects exhausted bath box；Described acid solution case import connect pure water and
Salt acid treatment, outlet connect the HL-1 cation beds of Di by acid solution delivery pump；Described lye tank import connects pure
Water and sodium hydroxide medicament, outlet connect the HL-3 anion beds of Di by alkali lye delivery pump；Described pure water tank
Import connects pure water, and outlet connects the HL-1 cation beds and HL-3 anion beds of Di by pure water delivery pump；Described
Exhausted bath box outlet is delivered to strong brine processing system by waste liquid delivery pump.
Inorganic ultra-filtration device of the present invention, using Multichannel ceramic membrane pipe (ultrafiltration aperture is no more than 50nm), component
Using SS316 shells.
Di influent quality of the present invention needs to meet, total oil≤1.0mg/L, suspension≤
10mg/L、CODcr≤30mg/L。
Cationic ion-exchange resin device of the present invention includes 2 cation beds (HL-1, HL-2), and wherein HL-1 cation beds are equipped with
Deliming, magnesium ion resin, HL-2 cation beds are equipped with highly acidic resin, adsorbable all cations.Anion exchange resin device bag
2 anion beds (HL-3, HL-4) are included, wherein HL-3 anion beds are equipped with removing chloride resin, and HL-4 anion beds are equipped with basic resin, can inhaled
Attached all anion.
HL-1 the and HL-2 cation beds of cationic ion-exchange resin device of the present invention are regenerated using counter flow in series, then crude drug
Agent is hydrochloric acid, and described anion exchange resin device HL-3 and HL-4 anion bed is regenerated using counter flow in series, and regenerative agent is hydrogen
Sodium oxide molybdena.
Ion exchange water treatment desalinating process of the present invention, ion exchange bed sequence and resin type selecting are needed according to not of the same race
Class water quality is adjusted.
Inorganic ultra-filtration water treatment facilities of the present invention, ultrafiltration membrane pipe retention precision, membrane area etc. need to be according to variety classes
Water quality carries out type selecting.
After cold rolling wastewater advanced treatment system provided by the invention and processing method processing, final producing water water quality meets
Industry water water standard, wherein pH7.0-8.0, electrical conductivity<500us/cm, SS<10mg/L, fully hard degree<150mg/L, calcium hardness<
100mg/L, basicity<110mg/L, chlorion<60mg/L, sulfate radical<50mg/L, Quan Tie<1mg/L, soluble SiO2<6mg/L,
Evaporation residue<300mg/L.
The advantageous effects of the present invention：
The present invention provides a kind of cold rolling wastewater advanced treatment system and processing method and reduces ton steel and consume new water index, processing effect
Fruit is stable, production run cost is low, operation operation is easy, and effluent quality can reach industry water water quality index, reach waste water recycling
Purpose；Because the content of calcium, magnesium hardness and silica ions in the final waste discharge of cold rolling is higher, battery lead plate fouling is avoided
Serious phenomenon, cause pole plate frequently pole-reversing, influence the service life of pole plate；The process system of the present invention is using calcium, magnesium ion
Special polymeric adsorbent, adsorption capacity is big, and does not influence resin life；Ion exchange resin to water oxidation-reduction potential without will
Ask, its pretreating process can use various advanced oxidation processes；Ion exchange resin is not high to pressure requirements, UPVC can be used to manage
Road, easy for construction and saving tubing expense.
Brief description of the drawings
Fig. 1 cold rolling wastewater advanced treatment system process flow diagrams provided by the invention；
Fig. 2 cold rolling wastewater advanced treatment system equipment flowsheets provided by the invention；
The application flow schematic diagram of Fig. 3 ultrafiltration rinse baths 16 of the present invention；
The application flow schematic diagram of Fig. 4 exhausted bath box 15 of the present invention；
The application flow schematic diagram of Fig. 5 acid solution casees 17 of the present invention；
The application flow schematic diagram of Fig. 6 lye tanks 19 of the present invention；
The application flow schematic diagram of Fig. 7 pure water tanks 21 of the present invention.
In figure：1- electroxidation air-floating apparatus, 2- ultrafiltration circulating boxes, 3- ultrafiltration circulating pumps, 4- inorganic ultra-filtration devices, 5- ultrafiltration
Produce pond, 6- resin supply-water pumps, 7- cationic ion-exchange resin devices, 8- degassing towers, 9- decarburization blower fans, 10- middle water pumps, 11-
Cationic ion-exchange resin device, the final water producing tanks of 12-, 13- production water send pump outside, 14- waste liquid delivery pumps, 15- exhausted bath box, and 16- surpasses
Filtering washing trough, 17- acid solution casees, 18- acid solution delivery pumps, 19- lye tanks, 20- alkali lye delivery pumps, 21- pure water tanks, 22- pure water are defeated
Send pump, 23- low-temperature plasma generators, 24- multiphase flow water pumps, 25- dissolvings, the micro-nano air supporting release heads of 26-, 27- scrapes slag
Machine, 28- scum silica frost collecting tanks.
Embodiment
For a better understanding of the present invention, the content that the present invention is furture elucidated with reference to the accompanying drawings and examples, but this
The content of invention is not limited solely to the following examples.
A kind of cold rolling wastewater advanced treatment system provided by the invention, the processing system by pipeline be sequentially connected etc. from
Sub- nanometer air-floating apparatus, ultrafiltration circulating box, inorganic ultra-filtration device, ultrafiltration production pond, cationic ion-exchange resin device, degassing tower,
Anion exchange resin device and final water producing tank；The inorganic ultra-filtration device is also connected with ultrafiltration rinse bath；The plasma
Nanometer air-floating apparatus includes low-temperature plasma generator, and the low-temperature plasma generator is connected by multiphase flow water pump and dissolving
Connect, the dissolving is connected with micro-nano air supporting release head, is also set up on the top of the plasma nanometer air-floating apparatus and is scraped slag
Machine.
Embodiment is using the final waste discharge in cold rolling wastewater station as raw water, treating capacity 0.25m3/h, handling process ginseng
Accompanying drawing 2 is examined, the cold rolling wastewater advanced treatment system includes plasma nanometer air-floating apparatus, inorganic ultra-filtration device, ultrafiltration circulation
Case, ultrafiltration circulating pump, ultrafiltration rinse bath, ultrafiltration production pond, resin supply-water pump, cationic ion-exchange resin, degassing tower, decarburization wind
Machine, middle water pump, anion exchange resin, final water producing tank, production water send pump, acid solution case, acid solution delivery pump, lye tank, alkali outside
Liquid delivery pump, pure water tank, pure water delivery pump, exhausted bath box and waste liquid delivery pump.
Described plasma air-floating apparatus includes low-temperature plasma generator, multiphase flow water pump, dissolving, micro-nano air supporting
Release head and Slag Scraping Device.Plasma is by particle groups such as electronics, negative ions, the atom of excitation state, molecule and free radicals
Into.This equipment is to be excited the air for having humidity in low-temperature plasma reaction warehouse, is produced with hydroxyl radical free radical and smelly
The gas of oxygen, then sewage is delivered to by micro-nano air supporting release head, hydroxyl radical free radical and ozone is fully contacted with pollutant
And oxidation reaction is produced, directly it is oxidized as CO2, water or salt, secondary pollution will not be produced.
Micro-nano air supporting release head, it is by multiphase flow water pump that the suction of the mixed gas and water of hydroxyl radical free radical and ozone is molten
In gas tank, discharged by micro-nano release head.Release head is rotated under the motive force of High-Pressure Water, and air pocket is cut into
Micro-nano bubble, and bubble is carried negative electrical charge, it is notable to the adsorption effect of water pollutant or suspension.Micro-nano bubble tool
There is the effect that the rate of climb is slow, has itself supercharging, and specific surface area is very big, has extraordinary gas dissolution capacity.
Inorganic ultra-filtration device uses big cross-flow filtration form, and production water enters ultrafiltration production pond, and concentrate recirculation to ultrafiltration circulates
Case.In the case of certain pressure difference and Turbulence Flow, make in waste water most of polar molecule by film, and all nonpolar points
The larger material of sub (such as colloid, oils, particulate) and relative molecular mass is trapped, so as to obtain removal waste water net for waste water
Change.
Inorganic ultra-filtration device, using Multichannel ceramic membrane pipe (ultrafiltration aperture is no more than 50nm), component is using outside SS316
Shell.Inorganic ceramic membrane has good chemical stability, and acid and alkali resistance, an organic solvent, high temperature resistant, antimicrobial ability,
Applicable pH range is 0~14, and Applicable temperature scope is at 0~300 DEG C.General operation pressure is about 0.2-0.35MPa.
Inorganic ultra-filtration plant running certain time, it is necessary to carry out Chemical cleaning when flux system declines or pressure difference raises.Root
According to the final waste discharge water quality situation of cold rolling, cleaning program is formulated.
Cationic ion-exchange resin device includes 2 cation beds (HL-1, HL-2), and wherein HL-1 cation beds are equipped with deliming, magnesium ion
Resin, HL-2 cation beds are equipped with highly acidic resin, adsorbable all cations.Anion exchange resin device includes 2 anion beds
(HL-3, HL-4), wherein HL-3 anion beds are equipped with removing chloride resin, and HL-4 anion beds are equipped with basic resin, adsorbable all the moon
Ion.
During initial launch, all resins need to be pre-processed using NaCl, HCl or NaOH, reach the absorption of maximum
Capacity.
Degassing tower is by water dispensing apparatus, packing layer (multiaspect hollow plastic ball, corrugated plating etc.), decarburization blower fan and middle water pump institute
Composition.The water outlet of cationic ion-exchange resin device enters tower body from top, is equably sprayed by water dispensing apparatus and is formed on filler surface
Moisture film, after packing layer and air contact, flow into bottom header tank and anion exchange resin device is delivered to by middle water pump.It is empty
Gas is blasted by decarburization blower fan from bottom of towe, is discharged together with the carbon dioxide separated out in water from top.
, need to be to ion exchange resin regeneration when ion exchange resin water outlet conductivity raises (>=400mg/L) suddenly.Sun
HL-1 the and HL-2 cation beds of Di are regenerated using counter flow in series, and the regenerative agent amount of being degree is 5%-
10% hydrochloric acid, regenerant consumption are 2 times of resin volume；Anion exchange resin device HL-3 and HL-4 anion bed are using series connection
Counter-current regeneration, regenerative agent are the sodium hydroxide that mass percentage content is 5%-10%, and regenerant consumption is 2 times of resinite
Product.
Final producing water water quality meets industry water water standard, wherein pH7.0-8.0, electrical conductivity<500us/cm, SS<10mg/
L, fully hard degree<150mg/L, calcium hardness<100mg/L, basicity<110mg/L, chlorion<60mg/L, sulfate radical<50mg/L, Quan Tie
<1mg/L, soluble SiO2<6mg/L, evaporation residue<300mg/L；
Waste water, which drains into, delivers to strong brine treating stations.
System Inlet and outlet water water quality situation is as in the table below：
Table one：Process system Inlet and outlet water water quality situation
Using treatment effect of the present invention stably, the dirts such as organic matter, suspension, oils and the salinity in waste water can effectively be removed
Thing is contaminated, reaches the purpose of waste water recycling；And production run cost is low, automation mechanized operation degree is high, and operation operation is easy.Can be extensive
Using cold rolling and the advanced treatment process of the final waste discharge of silicon steel.
Claims (8)
- A kind of 1. cold rolling wastewater advanced treatment system, it is characterised in that：The processing system is sequentially connected plasma by pipeline Nanometer air-floating apparatus, ultrafiltration circulating box, inorganic ultra-filtration device, ultrafiltration production pond, cationic ion-exchange resin device, degassing tower, the moon Di and final water producing tank；The inorganic ultra-filtration device is also connected with ultrafiltration rinse bath；The plasma is received Rice air-floating apparatus includes low-temperature plasma generator, and the low-temperature plasma generator is connected by multiphase flow water pump and dissolving Connect, the dissolving is connected with micro-nano air supporting release head, is also set up on the top of the plasma nanometer air-floating apparatus and is scraped slag Machine；The cationic ion-exchange resin device includes cation bed HL-1 and cation bed HL-2, the cation bed HL-1 connections cation bed HL-2, sun The import of bed HL-2 delivery port connection degassing tower；The outlet connection anion exchange resin device of the degassing tower, described the moon Di includes anion bed HL-3 and anion bed HL-4, the anion bed HL-3 connections anion bed HL-4, anion bed HL-4 outlets Connect final water producing tank；The built-in highly acidic resins for being used to adsorb calcium ion and magnesium ion of the cation bed HL-1, the cation bed HL-2 is built-in to be used to inhale The highly acidic resin of attached cation；The built-in basic resins for being used for adsorbing chloride ions of the anion bed HL-3, built in anion bed HL-4 For adsorpting anion basic resin.
- 2. cold rolling wastewater advanced treatment system according to claim 1, it is characterised in that the entrance A of the cation bed HL-1 leads to Acid solution delivery pump is crossed be connected with for the acid solution case of counter-current regeneration, the entrance A of the cation bed HL-1 also by pure water delivery pump and Pure water tank for counter-current regeneration connects；The cation bed HL-1 is connected with cation bed HL-2, for passing through the acid solution and pure water Enter cation bed HL-2 after cation bed HL-1, cation bed HL-2 water outlet B is connected with exhausted bath box.
- 3. cold rolling wastewater advanced treatment system according to claim 1, it is characterised in that the entrance C of the anion bed HL-3 leads to Alkali lye delivery pump is crossed be connected with for the lye tank of counter-current regeneration, the entrance C of the anion bed HL-3 also by pure water delivery pump and Pure water tank for counter-current regeneration connects；The anion bed HL-3 is connected with anion bed HL-4, for passing through the alkali lye and pure water Enter anion bed HL-4 after anion bed HL-3, anion bed HL-4 delivery port D is connected with exhausted bath box.
- 4. cold rolling wastewater advanced treatment system according to claim 1, it is characterised in that used in the inorganic ultra-filtration device Ceramic-film tube, the ultrafiltration aperture of the ceramic-film tube are no more than 50nm.
- 5. a kind of cold rolling wastewater deep treatment method, it is characterised in that described in methods described application claim any one of 1-4 Cold rolling wastewater advanced treatment system, comprises the following steps：(1) cold rolling wastewater enters plasma nanometer air-floating apparatus, the plasma generator production of the plasma nanometer air-floating apparatus Green tape has the gas of hydroxyl radical free radical and ozone, then is delivered to cold rolling wastewater by micro-nano air supporting release head, makes hydroxyl free Base and ozone are fully contacted with Pollutants in Wastewater and oxidation reaction occur, and pollutant is oxidized into CO2, water or salt；The opposing party The micro-nano air supporting release head in face is sucked the mixed gas and water of hydroxyl radical free radical and ozone in dissolving by multiphase flow water pump, Release head rotates under the motive force of High-Pressure Water, air pocket is cut into micro-nano bubble, the impurity in waste water is by small gas Bubble band is scraped to scum trough to the water surface by Slag Scraping Device, and then waste water enters ultrafiltration circulating box, and the waste water in ultrafiltration circulating box is through ultrafiltration Circulating pump, into inorganic ultra-filtration device, the inorganic ultra-filtration device uses big cross-flow filtration form, and production water enters ultrafiltration production water Pond, concentrate recirculation caused by inorganic ultra-filtration device to ultrafiltration circulating box；(2) after the cation that the waste water in ultrafiltration production pond is removed in waste water through entering cationic ion-exchange resin device, into de- Deaerated in the degassing of gas tower, the anion entered back into anion exchange resin device removal waste water, remove the waste water after anion Into final water producing tank.
- 6. cold rolling wastewater deep treatment method according to claim 5, it is characterised in that work as ion exchange in step (2) , need to be to ion exchange resin regeneration during electrical conductivity >=400mg/L of resin device water outlet.
- 7. cold rolling wastewater deep treatment method according to claim 5, it is characterised in that the cationic ion-exchange resin device Cation bed HL-1 and cation bed HL-2 using counter flow in series regenerate, it is that mass percentage content is 5%-10% to regenerate the medicament used Hydrochloric acid, the dosage of regenerative agent is 2 times of resin volume；The anion exchange resin device anion bed HL-3 and anion bed HL-4 are adopted Regenerated with counter flow in series, the medicament used that regenerates is the sodium hydroxide that mass percentage content is 5-10%, regenerative agent Dosage is 2 times of resin volume.
- 8. cold rolling wastewater deep treatment method according to claim 5, it is characterised in that the entrance after step (1) processing Pond waste water is produced in ultrafiltration：Total oil≤1.0mg/L, suspension≤10mg/L, CODcr≤30mg/L.
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