CN109019959A - A kind of processing unit of strong complex state heavy metal wastewater thereby and its discharge and reuse technology - Google Patents
A kind of processing unit of strong complex state heavy metal wastewater thereby and its discharge and reuse technology Download PDFInfo
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- CN109019959A CN109019959A CN201810899986.9A CN201810899986A CN109019959A CN 109019959 A CN109019959 A CN 109019959A CN 201810899986 A CN201810899986 A CN 201810899986A CN 109019959 A CN109019959 A CN 109019959A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/72—Copper
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- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/422—Treatment of water, waste water, or sewage by ion-exchange using anionic exchangers
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/425—Treatment of water, waste water, or sewage by ion-exchange using cation exchangers
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- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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Abstract
The invention discloses a kind of set treatment devices of strong complex state heavy metal wastewater thereby, including collecting pit, oxidizing tower, coagulation reaction tank A, coagulation reaction tank B, tubular type micro-filtration concentration basin, tube microfiltration membrane system, cation exchange resin tower, anion exchange resin tower and the reverse osmosis membrane system being sequentially communicated by pipeline；Wherein, anion exchange resin tower is also connected to sedimentation basin, and sedimentation basin is connected to sludge concentration tank and chelate resin tower respectively.The set treatment device of strong complex state heavy metal wastewater thereby disclosed by the invention, compared to conventional process mode, high treating effect is high-efficient, and operating cost is low, and the concentration of heavy metal ion such as copper, nickel are below examination criteria in final outflow water.
Description
Technical field
The invention belongs to the technical field of waste water processing in environmental project, and in particular to a kind of strong complex state weight of electronics industry
Metal wastewater treatment device.
Background technique
In electronics industry printed circuit board, semiconductor production process, the technique units such as etching, plating, melanism, which can generate, to be contained
There are the heavy metal wastewater therebies such as the copper, nickel, lead of complex state and ionic state.Common complexing agent has citric acid, tartaric acid, ethylenediamine tetra-acetic acid
(EDTA) and ethylenediamine tetraacetic methene sodium phosphate (EDTMPS) etc.；Wherein EDTA and EDTMPS is strong to the complexing power of heavy metal, poison
Property is big and difficult to degrade, belongs to common strong complexing agent.Conventional pretreatment mode, such as coagulation and filtration, tradition Fenton, electrochemistry
Deng to such strong complex state heavy metals removal, there are problems: contact break is insufficient or even high, dirty without contact break pretreatment, energy consumption
Mud amount is big etc..And in some ecologically fragile areas, the draining of electronics finishing industry needs to execute table in " discharge standard for electroplating pollutants "
Three standards, effluent index requirement is extremely stringent, therefore when use routine pretreatment mode, heavy metal index is difficult to reach in water outlet
The standard requirements.
In addition, frequently with ultrafiltration/micro-filtration+reverse osmosis (RO)+resin tower combination side when waste water progress recycling and reusing
Formula.After ultrafiltration/micro-filtration process, still there is the heavy metal ion of higher concentration in waste water, waste water is directly entered RO dress at this time
Set, have the following problems: producing water ratio reduces, and RO membrane module, which easily blocks, causes washing time frequent, and reagent consumption is more, and most
Discharge concentrated water amount increase etc. eventually.
Patent document (CN106242143A) discloses a kind of processing method of electroplating wastewater zero, technical process
Are as follows: in preprocessing process, coagulating is carried out by dosing coagulant, flocculation aid, oxidant etc., to remove suspended material
With ionic state heavy metal.Waste water recycling is realized subsequently through tubular type ultrafiltration and RO device, and wherein RO concentrated water is using evaporative crystallization
Mode is handled.Do not indicate the type of oxidant in technique pretreatment, and general oxidant such as sodium hypochlorite, hydrogen peroxide (H2O2),
It is more difficult to effectively remove complex state heavy metal, such as EDTA-Cu, it is higher so as to cause content of beary metal in subsequent RO concentrated water, it returns
Yield reduces, and backwashing period shortens, and backwash operation is frequent.
Patent document (CN 103274560B) discloses a kind of heavy metal wastewater thereby technique of zero discharge, using electrochemical process into
Row pretreatment, and after " tube microfiltration membrane (DF film)+RO " bi-membrane method, RO concentrated water addition MVR evaporator is evaporated
Processing.The technique carries out contact break reaction using electrochemical method, and single electrochemical means can abolish citric acid nickel, cupric tartrate
Equal complex compounds, but it is lower to EDTA type complex compound removal rate；It needs to be continually fed into operation and carries out cell reaction, power consumption compared with heavy current
Measure it is larger, it is costly；The sludge quantity of the consumable anode metal in cell reaction, generation obviously increases.Secondly, in the water outlet of DF film
Still containing the complex state heavy metal without contact break on a small quantity, so that RO film plugging rate increases, producing water ratio is reduced.
Patent document (CN 104817213A) discloses electroplated heavy metals waste water treatment process and its dedicated unit, the work
Skill is discharged after first being precipitated using preprocessing means when handling electroplated heavy metals waste water, is then chelated using two-stage series connection
Resin carries out ion-exchange absorption reaction enclosure, and metallic nickel is recycled in resin regeneration with leacheate, realize the discharge of waste water high standard with
Recycle the purpose of nickel.The technique only passes through the preprocessing means and chelating resin absorption of coagulating sedimentation, cannot remove in waste water
Strong complex state metallic nickel, leads to that producing water ratio is lower, processing load is higher, final displacement is larger, can not achieve waste water recycling.
As shown in the above, it is had the following problems in prior art: for EDTA, EDTMPS in electronics industry waste water etc.
Strong complex state heavy metals removal is insufficient, can not achieve high standard discharge；Resin type is single, cannot be removed effectively salinity；RO
Film lacks effective protection measure, and the rate of recovery is lower；To realize higher emissions index, Meteorological and energy consumption are larger etc..
Summary of the invention
Goal of the invention: in view of the shortcomings of the prior art, the present invention is intended to provide a kind of electronics industry wastewater treatment equipment, to reach
To effectively removing containing strong complex state heavy metal, Sewage treatment rate is improved, it is energy-saving, and finally realize high standard discharge and reuse
Purpose.
Technical solution: the invention discloses a kind of set treatment devices of strong complex state heavy metal wastewater thereby, including pass through pipe
Collecting pit that road is sequentially communicated, oxidizing tower, coagulation reaction tank A, coagulation reaction tank B, tubular type micro-filtration concentration basin, tube microfiltration membrane system
System, cation exchange resin tower, anion exchange resin tower and reverse osmosis membrane system；
Wherein, anion exchange resin tower is also connected to sedimentation basin, and sedimentation basin is set with sludge concentration tank and chelating respectively
The connection of rouge tower.
Wherein, reuse pipeline is equipped between the tube microfiltration membrane system and tubular type micro-filtration concentration basin.
Wherein, reuse pipeline is equipped between the reverse osmosis membrane system and cation exchange resin tower.
High standard discharge and reuse technology when the set treatment device of the strong complex state heavy metal wastewater thereby uses,
It is characterized in, comprising the following steps:
1) strong complex state heavy metal wastewater thereby is discharged into collecting pit and carries out Fenton contact break processing, adjusted wastewater pH and be 3~4 and add
Enter a certain amount of H2O2And FeSO4, while Cu/AC catalyst is added and is passed through O3Aeration；
2) the processed water of Fenton contact break is discharged into oxidizing tower, it is 6~8 that water outlet, which is adjusted pH, and NaHSO is added3Adjust oxygen
Change reduction potential value is 150~250mV；
3) water after adjusting is discharged into coagulation reaction tank A, it is 9~11 that water outlet, which adjusts pH, and aluminium polychloride is added and is mixed
Solidifying reaction 30min；Coagulation reaction tank B is then drained into, heavy metal ion agent for capturing is added and reacts 30min；
4) the processing water after coagulating is discharged into tubular type micro-filtration concentration basin, it is anti-to remove coagulation by tube microfiltration membrane system
The sediment that should be generated；Sediment is discharged into sedimentation basin；
5) filtered water stream enters intermediate pool, sequentially enters cation exchange resin tower and anion exchange tree by elevator pump
Rouge tower removes cation and anion that contact break reaction generates respectively；Processed water is discharged into reverse osmosis membrane system to carry out
Filter, the waste liquid cleaned are discharged into sedimentation basin；
6) processing water is discharged into reverse osmosis membrane system and is adjusted to neutral by pH value and then is filtered, and processed clear liquid reaches row
The standard of putting can safety dumping, filtered dope is discharged into cation exchange resin tower by reuse pipeline, continues cycling through processing；
7) processed adjusting acid-basic regenerated waste liquids in water pH is 10 and is discharged into sedimentation basin, makes the heavy metal ion shape in sedimentation basin
Hydrate is precipitated and is removed, and the supernatant after precipitating enters the absorption that chelate resin tower carries out heavy metal ion；
8) sediment in sedimentation basin is finally discharged into sludge concentration tank, is imported filter press and be carried out dehydrating, is squeezed
Water returns to technique front-end processing, the outer processing of mud cake committee of generation.
Wherein, the preparation process of Cu/AC catalyst described in step 1 is as follows: AC is impregnated in Cu (NO3)2In solution (Cu:
AC=0.01~0.05), 12~36h is impregnated, then heat up with the rate of 5 DEG C/min, fire 2 at normal pressure, 300~450 DEG C~
4h, heat preservation 2h are made.
Wherein, the H in step 1)2O2Dosage is 5~20g/g COD, FeSO4With H2O2Adding molar ratio is 1~10:1, O3
Aeration quantity is 1~10g/L, and the contact break reaction time is 1~2h.
Wherein, the dosage of the PAC in step 3) is 0.1~1mg/L, weight in heavy metal ion agent for capturing dosage and waste water
The ratio (mass ratio) of tenor is 1~10:1.
Wherein, step 5) middle-jiao yang, function of the spleen and stomach exchange resin tower uses H2SO4Removal cation carry out resin spent solution regeneration, yin from
Sub-exchange resin tower carries out resin spent solution regeneration using NaOH removal anion.
In use, specific technical solution is as follows:
(1) waste water is promoted to pH conditioning tank by collecting pit, and pond body side is equipped with NaOH and H2SO4Dosing mouth, bottom, which is equipped with, to expose
Air pipe.After adjusting pH, conditioning tank elevator pump is by waste water lifting to oxidizing tower, and fixed bed filler is Cu/AC catalyst in tower,
Bottom is O3Aerating pipelines, tower side are equipped with dosing mouth, add H2O2And FeSO4。
(2) the processing water after contact break is reacted is equipped with poly- successively from coagulation reaction tank A and coagulation reaction tank B is flow in the pond A
Close aluminium chloride (PAC), NaOH and H2SO4Dosing mouth is equipped with heavy metal ion agent for capturing dosing mouth in the pond B, is all provided with inside pond body
There is blender.
(3) the processing water after coagulating is equipped with blender in pond from tubular type micro-filtration concentration basin is flow to.Tubular type micro-filtration is dense
The outlet of contracting pond is equipped with tubular type micro-filtration raw water pump, and concentration basin water outlet is delivered to tube microfiltration membrane system.It is filtered through tube microfiltration membrane
Afterwards, concentrated water is back to tubular type micro-filtration concentration basin through tubular type micro-filtration circulating pump, produces water gravity flow and enters intermediate pool.
(4) the boosted pump of intermediate pool water outlet is successively delivered to cation exchange resin tower and anion exchange resin tower.
Exchange resin tower water outlet flow to reverse osmosis raw water box certainly, and is delivered to reverse osmosis membrane system by reverse osmosis water pump.Through reverse osmosis
After permeable membrane filtering, concentrated water produces water reuse to production line through reverse-osmosis circulating pump reflux Zhiyang exchange resin tower.
(5) ion exchange resin regeneration waste liquid is equipped with NaOH dosing mouth, is equipped with and stirs in pond from sedimentation basin, pond body side is flow to
Machine is mixed, bottom of pond is taper sludge bucket, and is equipped with sludge pipeline, is delivered to sludge concentration tank through sludge pump and is for further processing.It is heavy
Shallow lake pond supernatant enters small-sized chelate resin tower through delivery pump, and final outflow water can realize high standard emission request, chelate resin tower
Return of waste water is cleaned to reverse osmosis raw water box.
The utility model has the advantages that the set treatment device of strong complex state heavy metal wastewater thereby disclosed by the invention, compared to traditional Fenton
Reaction unit, by the way that catalyst and O are added into Fenton-like system3, contact break effect about 30% is improved, to EDTA-Cu/EDTA-Ni
Removal rate increase by 15%；Compared to electrochemical method, this method reduces operating cost about 40%, reduces sludge yield about
30%, contact break effect about 12% is improved, 10% is increased to the removal rate of EDTA-Cu/EDTA-Ni.Compared to conventional reverse osmosis system
System+resin tower mode is improved counter-infiltration system and is produced using male form+pretreatment mode of the female resin tower as counter-infiltration system
Water rate about 10% reduces counter-infiltration system wash number；Resin tower concentrated water alkaline chemical precipitation, further improves entire processing system
Discharge standard, supernatant enters chelate resin tower absorption, and the concentration of heavy metal ion such as copper, nickel are below detection in final outflow water
Standard.
Detailed description of the invention
Fig. 1 is the system block diagram of the set treatment device of strong complex state heavy metal wastewater thereby；
Fig. 2 is the wastewater treatment process figure of the set treatment device of strong complex state heavy metal wastewater thereby.
Specific embodiment
With reference to the accompanying drawings and examples and comparative example the present invention will be further explained.
First embodiment:
Certain printed circuit board factory electroless copper ejected wash water water quality: COD is 300~380mg/L, Cu2+For 60~70mg/L,
EDTA-Cu is 7~10mg/L, and wastewater flow 7.3t/h runs 8h daily.
The preparation of Cu/AC catalyst: AC is put into Cu (NO3)2In solution (Cu:AC=0.01~0.05), with 5 DEG C/min
Rate heating, fired at 300~450 DEG C.
The processing method of strong complex state copper waste water provided in this embodiment, comprising the following steps:
(1)Cu/AC+O3- Fenton contact break: adjusting wastewater pH is 4, and adds the H of 10L/h2O2(30wt.%) and 15.5L/h
FeSO4(10wt.%), while Cu/AC catalyst is added and is passed through the O of 1.5g/L3Aeration, reaction time 2h.
(2) reduce ORP value: it is 6 that processing water obtained in step (1), which is adjusted pH, and NaHSO is added3Reduction reaction is carried out,
And adjusting ORP value is 250mV.
(3) coagulating: it is 11 that processing water obtained in step (2), which is adjusted pH, and the PAC of 13L/h is first added
(10wt.%) carries out coagulating 30min, adds the heavy metal ion agent for capturing reaction 30min of 1.5L/h.
(4) DF is filtered: processing water obtained in step (3) is entered into DF system and is filtered, inlet pressure 0.2MPa,
Average flow of inlet water is 82t/h, and the sediment that removal coagulating generates, average water yield is 11t/h, and final sludge output is
40kg/d。
(5) ion exchange resin adsorbs: sequentially entering male form tree after the concentrated water that DF water outlet and subsequent RO generate is mixed
Rouge tower and female resin tower remove the cation and anion generated after contact break respectively.Use H2SO4Resin is carried out again with NaOH
Raw, the waste liquor PH for adjusting resin regeneration is 10 and is discharged into sedimentation basin, so that the heavy metal ion in sedimentation basin is formed hydroxide heavy
It forms sediment and removes, the supernatant after precipitating enters the absorption that small-sized chelate resin tower carries out heavy metal ion, further a removal huge sum of money
Belong to ion.Final chelate resin tower draining COD is 80~110mg/L, Cu2+< 0.04mg/L, lower than detection limit.
(6) RO produces water reuse: entering RO system, producing water ratio after the pH for handling water obtained in step (5) is adjusted to neutrality
It is 70%~72%, concentrate recirculation to exchange resin tower.
(7) Treatment of Sludge: the sediment in the sludge and sedimentation basin of DF generation is imported into filter press and is carried out dehydrating, is pressed
It squeezes water and returns to technique front-end processing, the outer processing of mud cake committee of generation.
Second embodiment:
Certain semiconductor factory nickel-containing waste water water quality: COD is 80~140mg/L, Ni2+For 6~10mg/L, EDTA-Ni is 1.2~
2.5mg/L, wastewater flow 50t/h, runs 12h daily.
The preparation of Cu/AC catalyst: AC is put into Cu (NO3)2In solution (Cu:AC=0.01~0.05), with 5 DEG C/min
Rate heating, fired at 300~450 DEG C.
The processing method of strong complex state nickel waste water provided in this embodiment, comprising the following steps:
(1)Cu/AC+O3- Fenton contact break: adjusting wastewater pH is 3, and adds the H of 35L/h2O2(30wt.%) and 65L/h's
FeSO4(10wt.%), while Cu/AC catalyst is added and is passed through the O of 4g/L3Aeration, reaction time 2h.
(2) reduce ORP value: it is 7 that processing water obtained in step (1), which is adjusted pH, and NaHSO is added3Reduction reaction is carried out,
And adjusting ORP value is 200mV.
(3) coagulating: it is 10 that processing water obtained in step (2), which is adjusted pH, and the PAC of 25L/h is first added
(10wt.%) carries out coagulating 30min, adds the heavy metal ion agent for capturing reaction 30min of 1L/h.
(4) DF is filtered: processing water obtained in step (3) being entered DF system and is filtered, inlet pressure is
0.25MPa, average flow of inlet water are 750t/h, and the sediment that removal coagulating generates, average water yield is 127t/h.
(5) ion exchange resin adsorbs: sequentially entering male form tree after the concentrated water that DF water outlet and subsequent RO generate is mixed
Rouge tower and female resin tower remove the cation and anion generated after contact break respectively.Use H2SO4Resin is carried out again with NaOH
Raw, the waste liquor PH for adjusting resin regeneration is 10 and is discharged into sedimentation basin, so that the heavy metal ion in sedimentation basin is formed hydroxide heavy
It forms sediment and removes, the supernatant after precipitating enters the absorption that small-sized chelate resin tower carries out heavy metal ion, further a removal huge sum of money
Belong to ion.Final chelate resin tower draining COD is 45~60mg/L, Ni2+< 0.01mg/L, lower than detection limit.
(6) RO produces water reuse: entering RO system, producing water ratio after the pH for handling water obtained in step (5) is adjusted to neutrality
It is 74%~76%, concentrate recirculation to exchange resin tower.
(7) Treatment of Sludge: the sediment in the sludge and sedimentation basin of DF generation is imported into filter press and is carried out dehydrating, is pressed
It squeezes water and returns to technique front-end processing, the outer processing of mud cake committee of generation.
Comparative example:
Certain printed circuit board factory electroless copper ejected wash water water quality: COD is 300~380mg/L, Cu2+For 60~70mg/L,
Middle EDTA-Cu is 7~10mg/L, and wastewater flow 7t/h runs 8h daily.This comparative example the following steps are included:
(1) adjusting pH is 3, using electrochemical process for treating, applied current density 5A/m2, voltage 150V, H2O2
(30%) dosage is 20L/h, reaction time 1h.
(2) adjusting pH is 9, is precipitated after stirring, and water outlet enters DF film, inlet pressure 0.3MPa, and average flow of inlet water is
85t/h, average water yield are 9t/h.
(3) adjusting DF water outlet pH is 6, into RO system, produces water reuse, concentrated water enters MVR evaporator, the condensed water of generation
Reuse, the outer processing of concentrate committee.
Using electrolysis method+coagulation+RO+MVR process flow, small-sized chelate resin tower water outlet (i.e. final draining) Cu2+For
0.34mg/L, final sludge output are 62kg/d, and average producing water ratio is 65%, and operating cost is about 74.9 yuan/ton of water.
Compared with the technique that comparative example uses, technique provided by the invention finally drains Cu2+< 0.04mg/L, effluent quality
Better than comparative example；Final sludge output is 40kg/d, and the outer expense of sludge committee is lower；Average producing water ratio is 71%, and recycling water is larger；
Operating cost is about 25.5 yuan/ton of water, and operating cost is lower.
In conclusion strong complex state process for treating heavy-metal waste water provided by the invention passes through using Cu/AC as catalyst
O3- Fenton contact break reaction, using male form+pretreatment mode of the female resin tower as RO, and by acid-basic regenerated waste liquids in water
Alkaline chemical precipitation, supernatant can effectively remove strong complex state heavy metal by the group technology of chelate resin tower exchange adsorption, effectively protect
RO film is protected, Sewage treatment rate is improved, it is energy-saving, and so that concentration of heavy metal ion is met high standard discharge and want
It asks.
The present invention provides the thinkings and application method of a kind of set treatment device of strong complex state heavy metal wastewater thereby, specifically
Realize that there are many method and the approach of the technical solution, the above is only a preferred embodiment of the present invention, it is noted that for
For those skilled in the art, without departing from the principle of the present invention, can also make it is several improvement and
Retouching, these modifications and embellishments should also be considered as the scope of protection of the present invention, each component part being not known in the present embodiment
It is realized with the prior art.
Claims (8)
1. a kind of set treatment device of strong complex state heavy metal wastewater thereby, characterized in that including the receipts being sequentially communicated by pipeline
Ji Chi (1), oxidizing tower (2), coagulation reaction tank A (3), coagulation reaction tank B (4), tubular type micro-filtration concentration basin (5), tube microfiltration membrane
System (6), cation exchange resin tower (7), anion exchange resin tower (8) and reverse osmosis membrane system (9)；
Wherein, anion exchange resin tower (8) also be connected to sedimentation basin (10), sedimentation basin (10) respectively with sludge concentration tank (11)
And chelate resin tower (12) connection.
2. a kind of set treatment device of strong complex state heavy metal wastewater thereby according to claim 1, characterized in that the pipe
It declines and is equipped with reuse pipeline between filter membrane system (6) and tubular type micro-filtration concentration basin (5).
3. a kind of set treatment device of strong complex state heavy metal wastewater thereby according to claim 1, characterized in that described anti-
It permeates and is equipped with reuse pipeline between membranous system (9) and cation exchange resin tower (7).
High standard discharge and reuse when 4. the set treatment device of strong complex state heavy metal wastewater thereby described in claim 1 uses
Technique, characterized in that the following steps are included:
1) strong complex state heavy metal wastewater thereby is discharged into collecting pit and carries out Fenton contact break processing, adjusted wastewater pH and be 3~4 and be added one
Quantitative H2O2And FeSO4, while Cu/AC catalyst is added and is passed through O3Aeration；
2) the processed water of Fenton contact break is discharged into oxidizing tower, it is 6~8 that water outlet, which is adjusted pH, and NaHSO is added3Adjust redox
Potential value is 150~250mV；
3) water after adjusting is discharged into coagulation reaction tank A, it is 9~11 that water outlet, which adjusts pH, and it is anti-that aluminium polychloride progress coagulation is added
Answer 30min；Coagulation reaction tank B is then drained into, heavy metal ion agent for capturing is added and reacts 30min；
4) the processing water after coagulating is discharged into tubular type micro-filtration concentration basin, coagulating is removed by tube microfiltration membrane system and is produced
Raw sediment；Sediment is discharged into sedimentation basin；
5) filtered water stream enters intermediate pool, sequentially enters cation exchange resin tower and anion exchange resin by elevator pump
Tower removes cation and anion that contact break reaction generates respectively；Processed water is discharged into reverse osmosis membrane system to be filtered,
Waste liquid after cleaning is discharged into sedimentation basin；
6) processing water is discharged into reverse osmosis membrane system and is adjusted to neutral by pH value and then is filtered, and processed clear liquid reaches discharge mark
Will definitely safety dumping, filtered dope is discharged into cation exchange resin tower by reuse pipeline, continues cycling through processing；
7) processed adjusting acid-basic regenerated waste liquids in water pH is 10 and is discharged into sedimentation basin, and the heavy metal ion in sedimentation basin is made to form hydrogen
Oxide precipitation and remove, the supernatant after precipitating enter chelate resin tower carry out heavy metal ion absorption；
8) sediment in sedimentation basin is finally discharged into sludge concentration tank, is imported filter press and be carried out dehydrating, squeeze water returns
Return technique front-end processing, the outer processing of mud cake committee of generation.
High standard discharge when 5. the set treatment device of strong complex state heavy metal wastewater thereby according to claim 4 uses and
Reuse technology, characterized in that the preparation process of Cu/AC catalyst described in step 1 is as follows: AC is impregnated in Cu (NO3)2Solution
In (Cu:AC=0.01~0.05), impregnate 12~36h, then heat up with the rate of 5 DEG C/min, burnt at normal pressure, 300~450 DEG C
2~4h is made, heat preservation 2h is made.
High standard discharge when 6. the set treatment device of strong complex state heavy metal wastewater thereby according to claim 4 uses and
Reuse technology, characterized in that the H in step 1)2O2Dosage is 5~20g/g COD, FeSO4With H2O2Add molar ratio be 1~
10:1, O3Aeration quantity is 1~10g/L, and the contact break reaction time is 1~2h.
High standard discharge when 7. the set treatment device of strong complex state heavy metal wastewater thereby according to claim 4 uses and
Reuse technology, characterized in that the dosage of the PAC in step 3) is 0.1~1mg/L, heavy metal ion agent for capturing dosage and useless
The ratio (mass ratio) of content of beary metal is 1~10:1 in water.
High standard discharge when 8. the set treatment device of strong complex state heavy metal wastewater thereby according to claim 4 uses and
Reuse technology, characterized in that step 5) middle-jiao yang, function of the spleen and stomach exchange resin tower uses H2SO4Removal cation carries out resin spent solution regeneration,
Anion exchange resin tower carries out resin spent solution regeneration using NaOH removal anion.
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| CN111252942A (en) * | 2020-02-21 | 2020-06-09 | 定颖电子(黄石)有限公司 | Imidazole-containing chemical silver plating wastewater treatment system and method |
| CN113388866A (en) * | 2021-06-25 | 2021-09-14 | 定颖电子(黄石)有限公司 | Combined recovery system and method for palladium-containing waste liquid of circuit board |
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| CN111252942A (en) * | 2020-02-21 | 2020-06-09 | 定颖电子(黄石)有限公司 | Imidazole-containing chemical silver plating wastewater treatment system and method |
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