CN107540134A - The strong brine qualified discharge processing system and method for a kind of cold rolling wastewater ion exchange - Google Patents

The strong brine qualified discharge processing system and method for a kind of cold rolling wastewater ion exchange Download PDF

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Publication number
CN107540134A
CN107540134A CN201610497265.6A CN201610497265A CN107540134A CN 107540134 A CN107540134 A CN 107540134A CN 201610497265 A CN201610497265 A CN 201610497265A CN 107540134 A CN107540134 A CN 107540134A
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heavy metal
strong brine
low
cold rolling
ion exchange
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CN107540134B (en
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吴昊
殷玫婕
秦志浩
陈砚秋
倪建春
宋艳丽
施杰
胡义纯
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Baowu Water Technology Co., Ltd
Baoshan Iron and Steel Co Ltd
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Baoshan Iron and Steel Co Ltd
Baosteel Engineering and Technology Group Co Ltd
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Abstract

The invention discloses a kind of strong brine qualified discharge processing system of cold rolling wastewater ion exchange and method, order is flowed through according to waste water, the system includes neutralization chamber, elevator pump, low-temperature plasma air-floating apparatus, electroxidation device, intermediate pool, filter intake pump, cartridge filter and heavy metal adsorption filter successively, the outlet of the neutralization chamber connects the elevator pump, reconnects the low-temperature plasma air-floating apparatus.Its treatment effect is stable, production run cost is low, operation operation is easy, and effluent quality is up to standard.

Description

The strong brine qualified discharge processing system and method for a kind of cold rolling wastewater ion exchange
Technical field
The present invention relates to water-treatment technology field, and in particular to the row up to standard of strong brine caused by a kind of steel industry cold rolling wastewater ion exchange Put processing system and processing method.
Background technology
Newest steel industry wastewater discharge standard is promulgated in June, 2012 in national environmental protection portion《Steel and iron industry pollution discharge standard》 (GB13456-2012).New standard has formulated major pollutants stricter emission limit, such as《Steel and iron industry Sewage Water Emissions mark It is accurate》In (GB 13456-1992), primary standard requirement CODcr≤100mg/L, oils≤8mg/L, SS≤70mg/L, and new standard table 3 cold rolling wastewater emission regulations, CODcr≤30mg/L, oils≤1mg/L, SS≤20mg/L.In addition, new standard adds partial contamination Thing emission control project, such as total iron, total copper, total arsenic, total chromium, total lead, total nickel, total cadmium, total mercury pollutant catabolic gene project.Standard It is required that from 1 day January in 2015, existing enterprise must require to perform according to table 2, higher for territorial development density.Environment is held Loading capability starts to weaken, or environmental carrying capacity is smaller, ecological environment frailty, and Heavy environmental pollution problem easily occurs and needs to take special guarantor The area of shield measure, perform the special emission limit of water pollutant as defined in table 3.Therefore, the most of iron and steel enterprise in the whole nation, which faces, proposes mark transformation, Final waste discharge is set to meet the requirement of new standard.
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, acidity Waste water, chromate waste water etc..Final waste discharge refer to above-mentioned all waste water by oil removing, pH adjustment, oxidation, reduction, coagulating sedimentation, Waste water after the processing of the conventional processes such as biochemistry, because this effluent part water quality is preferable compared to other cold rolling wastewater water quality, it is easier to carry out depth Processing and recycling.
It is well-known problem and strong brine is because the ion concentration in water is high, complicated, current many enterprises can not due to worry Solve the strong brine process problem during reuse, often abandon the measure of this energy-conserving and environment-protective of waste water recycling, selection is directly discharged, to life State environment increases burden.In line with the objective of energy-saving and emission-reduction, depth reuse can be carried out to final waste discharge using ion-exchange, go out it Water meets recirculating cooling water system moisturizing requirement.But caused strong brine needs also exist for being handled ion-exchange therewith, makes its water outlet same Sample must is fulfilled for《Steel and iron industry pollution discharge standard》(GB13456-2012) requesting party of table 3 can discharge.Ion-exchange depth is returned With the main exceeded water quality situation CODCr of rear caused strong brine：100-150mg/L, SS：80-120mg/L, total nitrogen：25-45mg/L, Total lead：0.16-0.24mg/L, total nickel：0.082-0.11mg/L, total chromium：0.12-0.22mg/L, total iron：2.5-3mg/L.
The strong brine qualified discharge handling process used in the prior art is different, as Publication No. CN105084602A is entitled： Following content is disclosed in a kind of method for the strong brine COD that degrades：The softened processing of strong brine, reduced by chemical method hard in strong brine Degree, so as to remove the part COD in strong brine；Again through catalytic oxidation treatment, flocculating setting processing, enhanced flocculation effect, reach degraded COD purpose.Catalytic oxidation technologies and Flocculating Settling Technology are used in combination, the COD in the strong brine that can effectively degrade.COD clearances can carry High by 10%~15%, colourity can reduce by 5~10 times.But strong brine is exceeded except COD, total nitrogen and other ions such as weight are often accompanied by Metal ion etc. is exceeded.Chemical method needs to add a large amount of medicaments during reducing the hardness in strong brine simultaneously, and operating cost is higher, can also Improve the basicity of strong brine.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of dense salt of ion exchange for being directed to the high conductivity cold rolling wastewater in saturated mode Water qualified discharge processing system.
Its technical problem to be solved can be implemented by the following technical programs.
A kind of strong brine qualified discharge processing system of cold rolling wastewater ion exchange, according to waste water flow through order, successively including neutralization chamber, carry Rise pump, low-temperature plasma air-floating apparatus, electroxidation device, intermediate pool, filter intake pump, cartridge filter and heavy metal adsorption mistake Filter, the outlet of the neutralization chamber connect the elevator pump, reconnect the low-temperature plasma air-floating apparatus.
As the further improvement of the technical program, the low-temperature plasma that described low-temperature plasma air-floating apparatus includes being sequentially connected occurs Device, multiphase flow water pump, dissolving and release head, and the Slag Scraping Device positioned at the device top；The top of the low-temperature plasma air-floating apparatus Import connects the outlet conduit of the elevator pump, and outlet connects the electroxidation device.
As the further improvement of the technical program, the plasma in the low-temperature plasma air-floating apparatus be by electronics, negative ions, The particles such as atom, molecule and the free radical of excitation state form；The air for having humidity in low-temperature plasma reaction warehouse is sent out through the low-temperature plasma Raw device excites the caused gas with hydroxyl radical free radical and ozone to be delivered to the waste water flowed through through the release head, makes hydroxyl radical free radical and ozone Fully contacted with pollutant and produce oxidation reaction, be directly oxidized as CO2, water or salt, do not produce secondary pollution.
Further, described low-temperature plasma air-floating apparatus uses pulse power system, and the pulse power system is Bipolar pulse power, Power supply uses low-voltage AC (voltage 220V, frequency 50Hz), pulse width<600ns, output services voltage 30-40KV, working pulse >80Hz, sparking electrode system are made up of multi-group electrode.Electrode spacing 10mm-20mm, surface is covered with dielectric.Crust of the device uses Lucite material makes.
The mixed gas and water of hydroxyl radical free radical and ozone are sucked molten gas by the low-temperature plasma air-floating apparatus of the present invention by multiphase flow water pump In tank, discharged by 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 set to carry negative electrical charge, it is notable to the adsorption effect of water pollutant or suspension.Bubble has that the rate of climb is slow, has itself supercharging Effect, and specific surface area is very big, has extraordinary gas dissolution capacity.
The further improvement of the technical program is also served as, electroxidation air supporting battery lead plate is set in the electroxidation device, and the battery lead plate point is just Pole and negative pole, both positive and negative polarity are overlapped into electrode group by cross arrangement combining form.
The electrode of described electroxidation device is in the status of " heart " in electro-catalytic oxidation technology, can be conductive, and and can is entered to reactant Row activation, improve the transfer rate of electronics.Battery lead plate is using titanium-base as base material, good conductivity, and chemical property is stable, anticorrosive, wear-resistant. The composite (precious metal material such as Ti, SnO2, Pt, PbO2) that electrode is solidified with good catalytic action is surfacing, operation week Phase is long, the resistance to consumption of electrode, catalyst are not lost in, non-secondary pollution.
Further, the thickness of the battery lead plate of the electroxidation device is 1~3mm, and adjacent electrode plates spacing is 1~5mm, electrode both positive and negative polarity it Between covered with dielectric；Operating supply voltage is 0-30V, and output current is 0~400A, and velocity of medium is 0.5~2.5m/s, rectifier cabinet Power output<12kw.
Electroxidation air supporting battery lead plate and electroxidation air supporting Slag Scraping Device are set in the electroxidation device of the present invention.Alternating current is converted by rectifying installation By battery lead plate after into direct current, battery lead plate produces micro-bubble, and by producing the effects such as electrolysis coagulation, the impurity in water is by micro-bubble band Scraped to the water surface by Slag Scraping Device to scum trough.
Further improvement also as the technical program, described neutralization chamber connection compressed air piping, is also connected with sodium hydroxide medicament chemical feed pipe； The electroxidation device top sets Slag Scraping Device and scum silica frost collecting tank, and bottom sets sludge collection groove, and the electroxidation device is exported described in connection Intermediate pool；Intermediate pool outlet by filter intake pump connection cartridge filter, the filter intake pump also with the low temperature etc. from Sub- air-floating apparatus connection；The outlet of the cartridge filter connects the heavy metal adsorption filter；The outlet of the heavy metal adsorption filter It is connected to floss hole.
In addition, the heavy metal adsorption filter is connected with resin soda acid regenerating unit, the import of the heavy metal adsorption filter is also associated with Pure water pipeline, outlet are then connected with exhausted bath box；Described resin soda acid regenerating unit import connects pure water, salt acid treatment and sodium hydroxide medicine respectively Agent, outlet connect the heavy metal adsorption filter by acid, alkali lye delivery pump respectively.
Further, it is 6.5-8.5 to flow through pH value of the waste water of the neutralization chamber after sodium hydroxide neutralization；It is aerated by compressed air, Uniform stirring.
Equally, described heavy metal adsorption filter built-in can remove chromium special project resin, while still have preferable suction to other type heavy metals Attached performance, adsorbable common heavy metal ion.The main component of resin is acrylic acid and acrylamide.Heavy metal adsorption filter volume For 40~100L, built-in resin volume is 20~50L, and resin volume accounting is 50%~60%.Heavy metal adsorption filter allows velocity of medium For 0.5~1.5m/s.
Another technical problem to be solved by this invention is to provide a kind of use as above at the strong brine qualified discharge of cold rolling wastewater ion exchange The processing method of reason system, this method comprise the following steps：
(1), the air for having humidity in the low-temperature plasma reaction warehouse in low-temperature plasma air-floating apparatus excites generation through low-temperature plasma generator Gas with hydroxyl radical free radical and ozone, the waste water flowed through is delivered to through the release head, makes hydroxyl radical free radical and ozone and pollutant abundant Contact and produce oxidation reaction, be directly oxidized as CO2, water or salt；
(2), electroxidation device makes organic molecule scission of link by direct electrochemistry, with the dissolved organic matter in degrading waste water and difficult biology drop The organic matter of solution；Generated by intermediate product of the anode reaction generation with strong oxidation or the intermediate reaction occurred outside anode reaction OH, O2Or HO2Free radical intermediate material, oxidative degradation are processed pollutant.
As the further improvement of this method, the heavy metal adsorption filter is connected with resin soda acid regenerating unit, the heavy metal adsorption mistake The import of filter is also associated with pure water pipeline, and outlet is then connected with exhausted bath box；Described resin soda acid regenerating unit import connects pure water, salt respectively Acid treatment and sodium hydroxide medicament, outlet connect the heavy metal adsorption filter by acid, alkali lye delivery pump respectively.
Heavy metal adsorption filter regeneration：After certain time is run, heavy metal adsorption filter resin bed retains and adsorbed a certain amount of pollution Thing, effluent quality is deteriorated when inlet outlet pressure differential is more than 0.5~0.8Pa.By resin regenerating device, counter-current regeneration is combined using soda acid, first The hydrochloric acid for being 5%-10% with the medicament amount of being degree, regenerant consumption are 2 times of resin volume, counter-current regeneration, after floated with pure water It is washed till close to neutrality；It is again the sodium hydroxide that mass percentage content is 4%-8% with medicament, regenerant consumption is 1 times of resin volume, inverse Stream regeneration, after with pure water rinse to close to neutrality.
Electroxidation device in this method can not only be acted on by air supporting removes impurities in water, and the dissolved organic matter in degradable waste water, The particularly organic matter of difficult for biological degradation.Organic matter degradation principle is as follows：
1), direct oxidation is that pollutant directly loses electronics in anode and aoxidized, and the direct electrochemistry conversion of organic matter is divided to two classes to carry out： First, electrochemically converting, i.e., noxious material is changed into innocuous substance, or abiotic compatible organic matter is converted into the material of bio-compatible (such as Aromatic substance ring-opening oxidation is aliphatic acid), so as to further biodegradable；Second, electrochemical combustion, i.e., be dioxy directly by organic matter deep oxidation Change carbon.
2), indirect oxidation is by anode reaction generation intermediate product (such as OH, O with strong oxidation2、·HO2Deng free radical), It is finally reached the purpose of oxidative degradation pollutant.Organic matter is degraded in the presence of oxygen radical, improves current efficiency, saves electric energy Consumption.
Electroxidation air supporting is by oxidation, by the Fe in waste water2+It is oxidized to Fe3+, improve the air flotation effect of waste water as flocculant and filtering imitated Fruit, and remove the Fe in waste water3+.Therefore, electroxidation air supporting reaches degradation of organic substances in the case where not adding any chemical agent, goes The effect of oil removal and sterilization algae removal.
The strong brine of the cold rolling wastewater ion exchange handled using above-mentioned qualified discharge processing system and processing method, is flowing through said apparatus successively Afterwards, system effluent quality meets《Steel and iron industry pollution discharge standard》(GB13456-2012) standard of table 3, major pollutants index can To reach following data：
pH：7.0-9.0, CODCr：≤ 30mg/L, SS：≤ 20mg/L, total nitrogen：≤ 15mg/L, total lead：≤ 1mg/L, total nickel：≤ 0.5mg/L, total chromium：≤ 1mg/L, total iron：≤2mg/L.
The strong brine handling process up to standard of cold rolling wastewater ion exchange provided by the invention, treatment effect is stable, production run cost is low, behaviour It is easy to make operation, effluent quality can reach《Steel and iron industry pollution discharge standard》(GB13456-2012) standard of table 3；Using the present invention Process system, only use two kinds of medicaments of hydrochloric acid and sodium hydroxide, reach the effect of the pollutants such as COD, SS, total nitrogen and heavy metal, drop Low wastewater treatment operating cost.
Brief description of the drawings
Fig. 1 is the process chart of cold rolling ion exchange strong brine processing up to standard provided by the invention；
The application flow schematic diagram of Fig. 2 acid solution casees of the present invention；
The application flow schematic diagram of Fig. 3 lye tanks of the present invention；
The application flow schematic diagram of Fig. 4 exhausted bath box of the present invention；
Fig. 5 electroxidation schematic devices；
Fig. 6 electroxidation device electrode structural representations.
In figure：1 --- --- elevator pump 3 --- low-temperature plasma air supporting 4 --- low-temperature plasma generator of neutralization chamber 2 5 --- --- --- Slag Scraping Device 8 --- rectifier cabinet 9 --- electroxidation devices of dissolving 7 of multiphase flow water pump 6 10 --- --- --- the filter intake pumps 13 --- cartridge filter 14 --- of intermediate water tank 12 of battery lead plate 11 Heavy metal adsorption filter 15 --- --- receive sodium hydroxide 16 by aeration head 17 --- release head 18 --- waste residue Collect --- --- --- exhausted bath box 22 --- pure water 23 --- acid of removing heavy metals resin 21 of hydrochloric acid 20 of groove 19 --- --- lye tank 26 --- alkali lye delivery pump 27 --- the waste liquid delivery pump of acid solution delivery pump 25 of liquid case 24 28 --- positive electricity level 29 --- negative electrode 30 --- insulation nets
Embodiment
The embodiment of the present invention is described in further detail below in conjunction with accompanying drawing.
Embodiment 1
Embodiment 1 is using the final waste discharge in cold rolling wastewater station using strong brine caused by ion-exchange depth reuse as raw water, original Water water quality is as shown in table 1 below, treating capacity 0.1m3/h, the handling process of embodiment 1 handling process as shown in Figure 1.
Table 1：Influent quality table
Waste water enters by neutralization chamber 1, elevator pump 2, low-temperature plasma air supporting 3, electroxidation device 9, intermediate pool 11, filter successively Water pump 12, cartridge filter 13, heavy metal adsorption filter 14.In the medicament that neutralization chamber 1 passes through sodium hydroxide 15 and waste water is to pH 7.5, It is aerated by compressed air, uniform stirring (is realized) by the aeration head 16 in Fig. 1.
Low-temperature plasma air-floating apparatus includes low-temperature plasma generator 4, multiphase flow water pump 5, dissolving 6 and the release head being sequentially connected 17.Plasma in low-temperature plasma device is by particle groups such as electronics, negative ions, the atom of excitation state, molecule and free radicals Into.Low-temperature plasma device 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 release head, hydroxyl radical free radical and ozone is fully contacted with pollutant and produce oxidation reaction, directly It is oxidized as CO2, water or salt, do not produce secondary pollution.
The feature of low-temperature plasma device is that pulse power system use Bipolar pulse power, power supply use low-voltage AC (voltage 220v, Frequency 50Hz), pulse width 500ns, output services voltage 30kv, working pulse 100Hz, sparking electrode system is by multi-group electrode group Into.Electrode spacing 15mm, surface is covered with dielectric.Crust of the device is made using lucite material.
The battery lead plate 10 of electroxidation device 9 connects the rectifier cabinet 8 of outside, and electrode divides positive electrode 28 and negative electrode 29, positive and negative electrode 28 Electrode group shown in Fig. 6 is overlapped into by cross arrangement combining form with 29, insulation net 30 is provided between positive and negative electrode 28 and 29. Electroxidation device makes organic molecule scission of link, and the dissolved organic matter in degradable waste water, particularly difficult for biological degradation by direct electrochemistry Organic matter.The centre generated by the intermediate reaction outside intermediate product of the anode reaction generation with strong oxidation or generation anode reaction Material (OH, O2、·HO2Deng free radical), processed pollutant is aoxidized, is finally reached the purpose of oxidative degradation pollutant.
The electrode of electroxidation device is in the status of " heart " in electro-catalytic oxidation technology, can be conductive, and and can activates to reactant, Improve the transfer rate of electronics.Electrode is using titanium-base as base material, good conductivity, and chemical property is stable, anticorrosive, wear-resistant).Electrode is consolidated The composite (Ru precious metal materials) that changing has good catalytic action be surfacing, the cycle of operation is long, electrode it is resistance to consume, catalyst does not flow Lose, non-secondary pollution.
The thickness of the battery lead plate of electroxidation device selects 1mm, adjacent electrode plates spacing 3mm, covered with dielectric between electrode both positive and negative polarity. Operating supply voltage is 10v, output current 350A, velocity of medium 1m/s.Rectifier cabinet power output 3.5kw.
Electroxidation device 9 sets Slag Scraping Device 7 and scum silica frost collecting tank 18 above, and bottom sets sludge collection groove.
Heavy metal adsorption filter 14 is built-in to remove chromium special project resin (referring to the removing heavy metals resin 20 in figure), while to other type weights Metal still has preferable absorption property, adsorbable common heavy metal ion.The main component of resin is acrylic acid and acrylamide.With much money The category volume of adsorption filter 14 is 40L, and built-in resin volume is 20L, and resin volume accounting is 50%.Heavy metal adsorption filter allows Velocity of medium is 1m/s.
Heavy metal adsorption filter regeneration：After certain time is run, heavy metal adsorption filter resin bed retains and adsorbed a certain amount of pollution Thing, effluent quality is deteriorated when inlet outlet pressure differential is more than 0.5.By resin regenerating device, counter-current regeneration is combined using soda acid, is with medicament first Measure the hydrochloric acid (interface referring to the label 19 in figure at) that degree is 5%, regenerant consumption is 2 times of resin volume, counter-current regeneration, After with pure water (interface referring to the label 22 in figure at) rinsing to close to neutrality；It is again the hydrogen that mass percentage content is 4% with medicament Sodium oxide molybdena (interface referring to the label 15 of right lateral position in Fig. 1 at), regenerant consumption are 1 times of resin volume, counter-current regeneration, after use Pure water is rinsed to close neutrality.
As shown in Fig. 2 regenerating the connection signal of acid solution case 23 of link for heavy metal adsorption filter 14, one end of acid solution case 23 is hydrochloric acid With the water inlet of pure water, the other end leads to heavy metal adsorption resin through acid solution delivery pump 24.Equally, as shown in figure 3, the one of lye tank 25 The water inlet of end connection sodium hydroxide and pure water, the other end lead to heavy metal adsorption resin through alkali lye delivery pump 26.Filled in above-mentioned resin regeneration During the soda acid joint counter-current regeneration put, waste liquid is sent to heavy metal specialty recovery by the exhausted bath box 21 in Fig. 4 through waste liquid delivery pump 27.
The system effluent quality of embodiment 1 see the table below shown in 2：
Table 2：Effluent quality situation
Embodiment 2
Embodiment 2 is using the final waste discharge in cold rolling wastewater station using strong brine caused by ion-exchange depth reuse as raw water, original Water water quality is as shown in table 3 below, treating capacity 0.2m3/ h, the handling process of embodiment 2 handling process as shown in Figure 1.
Table 3：Influent quality table
Waste water enters by neutralization chamber 1, elevator pump 2, low-temperature plasma air supporting 3, electroxidation device 9, intermediate pool 11, filter successively Water pump 12, cartridge filter 13, heavy metal adsorption filter 14.
Neutralization chamber by sodium hydroxide medicament and waste water to pH 7.8, be aerated by compressed air, uniform stirring.
Plasma in low-temperature plasma device is by particle groups such as electronics, negative ions, the atom of excitation state, molecule and free radicals Into.Low-temperature plasma device 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 release head, hydroxyl radical free radical and ozone is fully contacted with pollutant and produce oxidation reaction, directly It is oxidized as CO2, water or salt, do not produce secondary pollution.
The feature of low-temperature plasma device is that pulse power system use Bipolar pulse power, power supply use low-voltage AC (voltage 220V, Frequency 50Hz), pulse width 500ns, output services voltage 30kv, working pulse 100Hz, sparking electrode system is by multi-group electrode group Into.Electrode spacing 15mm, surface is covered with dielectric.Crust of the device is made using lucite material.
Electroxidation device electrode divides positive pole and negative pole, and both positive and negative polarity is overlapped into electrode group by cross arrangement combining form.Electroxidation device passes through straight Connecing electro-catalysis makes organic molecule scission of link, and the organic matter of the dissolved organic matter in degradable waste water, particularly difficult for biological degradation.Pass through sun The intermediate material of intermediate reaction generation outside intermediate product or generation anode reaction of the pole reaction generation with strong oxidation (·OH、·O2、·HO2Deng free radical), processed pollutant is aoxidized, is finally reached the purpose of oxidative degradation pollutant.
The electrode of electroxidation device is in the status of " heart " in electro-catalytic oxidation technology, can be conductive, and and can activates to reactant, Improve the transfer rate of electronics.Electrode is using titanium-base as base material, good conductivity, and chemical property is stable, anticorrosive, wear-resistant).Electrode is consolidated The composite (PbO2 precious metal materials) that changing has good catalytic action is surfacing, the cycle of operation is long, the resistance to consumption of electrode, catalyst It is not lost in, non-secondary pollution.
The feature of electroxidation device selects 1mm for the thickness of battery lead plate, adjacent electrode plates spacing 2mm, covered with exhausted between electrode both positive and negative polarity Edge medium.Operating supply voltage is 10v, output current 330A, velocity of medium 0.9m/s.Rectifier cabinet power output 3.3kw.
Slag Scraping Device and scum silica frost collecting tank are set above electroxidation device, and bottom sets sludge collection groove.
Heavy metal adsorption filter is built-in to remove chromium special project resin, while still has preferable absorption property to other type heavy metals, adsorbable Common heavy metal ion.The main component of resin is acrylic acid and acrylamide.Heavy metal adsorption filter volume is 40L, built-in resin Volume is 20L, and resin volume accounting is 50%.Heavy metal adsorption filter allows velocity of medium to be 0.9m/s.
Heavy metal adsorption filter regeneration：After certain time is run, heavy metal adsorption filter resin bed retains and adsorbed a certain amount of pollution Thing, effluent quality is deteriorated when inlet outlet pressure differential is more than 0.5.By resin regenerating device, counter-current regeneration is combined using soda acid, is with medicament first Measure the hydrochloric acid that degree is 5%, regenerant consumption is 2 times of resin volume, counter-current regeneration, after rinsed with pure water in Property；It is again the sodium hydroxide that mass percentage content is 4% with medicament, regenerant consumption is 1 times of resin volume, counter-current regeneration, is finished Rinsed afterwards with pure water to close neutrality.
The system effluent quality of embodiment 2 see the table below shown in 4：
Table 4：Effluent quality situation
Using the strong brine qualified discharge handling process and processing system of cold rolling wastewater ion exchange provided by the invention, specifically for cold rolling wastewater The characteristics of high conductivity sewage of this saturated mode of strong brine of ion exchange, using specific order, mainly make use of low-temperature plasma air supporting, The technological means such as electroxidation device, heavy metal adsorption, preferable treatment effect is reached, its processing system is stablized, works well, is processed into This is low, easy to operate, and effluent quality can reach effluent quality and substantially meet《Steel and iron industry pollution discharge standard》(GB13456-2012) Table 3 requires.Also the strong brine qualified discharge processing technological flow of mark transformation can be put forward as cold rolling and silicon steel waste water.

Claims (13)

  1. A kind of 1. strong brine qualified discharge processing system of cold rolling wastewater ion exchange, it is characterised in that order is flowed through according to waste water, according to It is secondary to be filtered including neutralization chamber, elevator pump, low-temperature plasma air-floating apparatus, electroxidation device, intermediate pool, filter intake pump, security personnel Device and heavy metal adsorption filter, the outlet of the neutralization chamber connect the elevator pump, reconnect the low-temperature plasma air-floating apparatus.
  2. 2. the strong brine qualified discharge processing system of cold rolling wastewater ion exchange according to claim 1, it is characterised in that described Low-temperature plasma air-floating apparatus includes low-temperature plasma generator, multiphase flow water pump, dissolving and the release head being sequentially connected, and is located at The Slag Scraping Device on the device top；The upper inlet of the low-temperature plasma air-floating apparatus connects the outlet conduit of the elevator pump, and outlet connects the electricity Oxidation unit.
  3. 3. the strong brine qualified discharge processing system of cold rolling wastewater ion exchange according to claim 2, it is characterised in that described low Plasma in warm plasma air-floating apparatus is made up of particles such as electronics, negative ions, the atom of excitation state, molecule and free radicals； The air for having humidity in low-temperature plasma reaction warehouse excites the caused gas with hydroxyl radical free radical and ozone through the low-temperature plasma generator Body is delivered to the waste water flowed through through the release head.
  4. 4. the strong brine qualified discharge processing system of cold rolling wastewater ion exchange according to Claims 2 or 3, it is characterised in that institute The low-temperature plasma air-floating apparatus stated uses pulse power system, and the pulse power system includes Bipolar pulse power, and its voltage is 220V, Frequency is 50Hz, pulse width<600ns, output services voltage are 30-40KV, working pulse>80Hz, sparking electrode system is by multigroup Electrode forms, electrode spacing 10mm-20mm.
  5. 5. the strong brine qualified discharge processing system of cold rolling wastewater ion exchange according to claim 1, it is characterised in that the electricity Electroxidation air supporting battery lead plate is set in oxidation unit, and the battery lead plate divides positive pole and negative pole, and both positive and negative polarity is overlapping by cross arrangement combining form Into electrode group.
  6. 6. the strong brine qualified discharge processing system of cold rolling wastewater ion exchange according to claim 5, it is characterised in that the electricity Using titanium-base as base material, surface cure has selected from Ti, SnO pole plate2, Pt or PbO2In one or more of metallic composites.
  7. 7. according to the strong brine qualified discharge processing system of the cold rolling wastewater ion exchange of claim 5 or 6, it is characterised in that described The thickness of the battery lead plate of electroxidation device is 1~3mm, and adjacent electrode plates spacing is 1~5mm, covered with dielectric between electrode both positive and negative polarity； Operating supply voltage is 0-30V, and output current is 0~400A, and velocity of medium is 0.5~2.5m/s, rectifier cabinet power output<12kw.
  8. 8. the strong brine qualified discharge processing system of cold rolling wastewater ion exchange according to claim 1, it is characterised in that in described Compressed air piping is connected with groove, is also connected with sodium hydroxide medicament chemical feed pipe；The electroxidation device top sets Slag Scraping Device and scum silica frost collecting tank, Bottom sets sludge collection groove, and the electroxidation device outlet connects the intermediate pool；The intermediate pool outlet connects by filter intake pump Cartridge filter is connect, the filter intake pump is also connected with the low-temperature plasma air-floating apparatus；The outlet connection institute of the cartridge filter State heavy metal adsorption filter；The outlet of the heavy metal adsorption filter is connected to floss hole.
  9. 9. according to the strong brine qualified discharge processing system of the cold rolling wastewater ion exchange of claim 1 or 8, it is characterised in that described Heavy metal adsorption filter is connected with resin soda acid regenerating unit, and the import of the heavy metal adsorption filter is also associated with pure water pipeline, outlet Then it is connected with exhausted bath box；Described resin soda acid regenerating unit import connects pure water, salt acid treatment and sodium hydroxide medicament respectively, and outlet leads to respectively Peracid, alkali lye delivery pump connect the heavy metal adsorption filter.
  10. 10. the strong brine qualified discharge processing system of cold rolling wastewater ion exchange according to claim 8, it is characterised in that flow through described PH value of the waste water of neutralization chamber after sodium hydroxide neutralization is 6.5-8.5.
  11. 11. the strong brine qualified discharge processing system of cold rolling wastewater ion exchange according to claim 1, it is characterised in that described heavy Metal adsorption filter is built-in to remove chromium special project resin, and the main component of the resin is acrylic acid and acrylamide；The heavy metal adsorption filtering The volume of device is 40~100L, and the volume of built-in resin is 20~50L, and resin volume accounting is 50%~60%；The heavy metal adsorption mistake Filter allows velocity of medium to be 0.5~1.5m/s.
  12. A kind of 12. strong brine qualified discharge using the cold rolling wastewater ion exchange of claim 1,2,3,5,6,8,10 or 11 The strong brine qualified discharge processing method of processing system, it is characterised in that comprise the following steps：
    (1), the air for having humidity in the low-temperature plasma reaction warehouse in low-temperature plasma air-floating apparatus excites generation through low-temperature plasma generator Gas with hydroxyl radical free radical and ozone, the waste water flowed through is delivered to through the release head, makes hydroxyl radical free radical and ozone and pollutant abundant Contact and produce oxidation reaction, be directly oxidized as CO2, water or salt；
    (2), electroxidation device makes organic molecule scission of link by direct electrochemistry, with the dissolved organic matter in degrading waste water and difficult biology drop The organic matter of solution；Generated by intermediate product of the anode reaction generation with strong oxidation or the intermediate reaction occurred outside anode reaction OH, O2Or HO2Free radical intermediate material, oxidative degradation are processed pollutant.
  13. 13. strong brine row up to standard according to claim 12 puts processing method, it is characterised in that the heavy metal adsorption filtering Device is connected with resin soda acid regenerating unit, and the import of the heavy metal adsorption filter is also associated with pure water pipeline, and outlet is then connected with exhausted bath box； Described resin soda acid regenerating unit import connects pure water, salt acid treatment and sodium hydroxide medicament respectively, and outlet passes through acid, alkali lye delivery pump respectively Connect the heavy metal adsorption filter；When the inlet outlet pressure differential of heavy metal adsorption filter is more than 0.5~0.8Pa, resin regeneration dress is enabled Put, counter-current regeneration is combined using soda acid, be first the hydrochloric acid that mass percentage content is 5%-10% with medicament, regenerant consumption is 2 times of resin Volume, counter-current regeneration, after with pure water rinse to close to neutrality；It is again the sodium hydroxide that mass percentage content is 4%-8% with medicament, Regenerant consumption is 1 times of resin volume, counter-current regeneration, after rinsed with pure water to close to neutrality.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101306896A (en) * 2008-07-14 2008-11-19 中国矿业大学(北京) Process and system for treating high-ammonia-nitrogen-containing waste water
CN105217846A (en) * 2014-05-29 2016-01-06 宝山钢铁股份有限公司 Cold rolling alkaline waste discharge advanced treatment system and treatment process
CN105217826A (en) * 2014-05-29 2016-01-06 宝山钢铁股份有限公司 A kind of cold rolling wastewater advanced treatment system and treatment process

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101306896A (en) * 2008-07-14 2008-11-19 中国矿业大学(北京) Process and system for treating high-ammonia-nitrogen-containing waste water
CN105217846A (en) * 2014-05-29 2016-01-06 宝山钢铁股份有限公司 Cold rolling alkaline waste discharge advanced treatment system and treatment process
CN105217826A (en) * 2014-05-29 2016-01-06 宝山钢铁股份有限公司 A kind of cold rolling wastewater advanced treatment system and treatment process

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