CN107324538A - A kind of electroplating wastewater of chromium processing method and processing unit - Google Patents
A kind of electroplating wastewater of chromium processing method and processing unit Download PDFInfo
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- CN107324538A CN107324538A CN201710611505.5A CN201710611505A CN107324538A CN 107324538 A CN107324538 A CN 107324538A CN 201710611505 A CN201710611505 A CN 201710611505A CN 107324538 A CN107324538 A CN 107324538A
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- sulfuric acid
- adsorption tower
- reaction groove
- chromium
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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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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/70—Treatment of water, waste water, or sewage by reduction
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Abstract
The invention belongs to electroplating waste water treatment technology field, a kind of electroplating wastewater of chromium processing method and processing unit are specifically disclosed.The highly acid macroporous polymer resin bed containing sulfonic acid group is filled with electroplating wastewater of chromium processing unit, including electroplating effluent storage tank, chemical reaction groove, adsorption tower and accumulator tank, sulfuric acid tank and stillpot, adsorption tower.In chemical reaction groove, FeSO is used4·7H2O is trivalent chromium to hexavalent chrome reduction in electroplating wastewater of chromium, is then adsorbed again through flocculation sediment, highly acid macroporous polymer resin bed, the Cr in electroplating wastewater can be handled simultaneously3+、Cr6+Deng cation, treatment effeciency is high.
Description
Technical field
The invention belongs to electroplating waste water treatment technology field, and in particular to a kind of electroplating wastewater of chromium processing method and processing
Device.
Background technology
Plating is the technique for the surface attachment layer of metal film for making metal or other materials product using electrolysis, energy
Enough played to plated product prevents corrosion, improves the effect such as wearability, electric conductivity, reflective.According to the difference using coated metal,
Plating is divided into chromium plating, copper plating, nickel plating etc..
Occur that chromium ion concentration is higher in chromate waste water, this waste water unavoidably during chromium plating technology, these contain chromium
Electroplating wastewater belongs to carcinogenic, teratogenesis, mutagenic extremely toxic substance, and the living environment to the mankind and other biological causes very big danger
Evil.Therefore, the processing of electroplating wastewater of chromium is very necessary.
The processing method of traditional electroplating wastewater of chromium mainly has：Chemical precipitation method, chemical reduction method etc., it is impossible to make Cr VI
Ion is recycled, and causes the wasting of resources.Chinese patent CN102154681B《A kind of method of purifying hexavalent chromium electroplating waste liquid and
Device》Although can complete to handle electroplating effluent without dilution step and concentration step, the higher chromium rate of recovery is reached, it is said
Primarily directed to Zn described in bright book2+、Cu2+、Cr3+、Fe3+Processing, but high using only polymeric adsorbent cost, adsorbance has
Limit, and belong in physical absorption, resin eluent and still have Cr3+Poisonous ion residues.
The content of the invention
A kind of electroplating wastewater of chromium processing method and processing unit that the present invention is provided, solve using only polymeric adsorbent into
This height, adsorbance is limited, and belongs in physical absorption, resin eluent and still have Cr3+Poisonous ion residues the problem of.
First purpose of the present invention is to provide a kind of electroplating wastewater of chromium reason device, including electroplating effluent storage tank, chemistry
The highly acid macroporous polymer resin bed containing sulfonic acid group, institute are filled with reactive tank, adsorption tower and accumulator tank, the adsorption tower
State between the outlet of electroplating effluent storage tank and the entrance of the chemical reaction groove, the outlet of the chemical reaction groove and the absorption
By pipeline communication between the entrance of tower, between the outlet of the adsorption tower and the entrance of the accumulator tank, and each pipeline
On be equipped with valve, the outlet of the chemical reaction groove is with being additionally provided with the on the pipeline connected between the entrance of the adsorption tower
It is provided with flow meters, the electroplating effluent storage tank on monitor, the chemical reaction groove and is further opened with dog-house, the suction
Attached tower upper end is further opened with sulfuric acid entrance, and the sulfuric acid entrance has sulfuric acid tank, the adsorption tower by the first sulfuric acid pipeline communication
Lower end has by the second sulfuric acid pipeline communication is provided with second flowmeter and the first sulfuric acid on stillpot, the first sulfuric acid pipeline
The second sulfuric acid valve is provided with valve, the second sulfuric acid pipeline.
It is preferred that, above-mentioned electroplating wastewater of chromium processing unit, the chemical reaction groove is provided with observation panel, sample tap and sinks
Shallow lake sewage draining exit.
It is preferred that, above-mentioned electroplating wastewater of chromium processing unit, the upper end of the chemical reaction groove and the lower end of accumulator tank it
Between connected by reflux line, and the reflux line be provided with elevator pump.
Second object of the present invention is to provide a kind of processing method of electroplating wastewater of chromium processing unit, including following step
Suddenly：S1, the total chrome content of electroplating wastewater of chromium in electroplating effluent storage tank is detected using monitor, when total chrome content reach it is certain dense
When spending, the valve between the electroplating effluent storage tank and the chemical reaction groove is opened, electroplating wastewater of chromium is flowed into chemistry anti-
Answer in groove, after being 3-3.5 with 30% sulfuric acid regulation whole system pH, FeSO is added from dog-house4·7H2O, with 250-300r/
Min speed stirring 15-30min, after stirring is finished, then toward adding NaOH in chemical reaction groove, regulation whole system pH value is
6.5-7.5, adds PAFC thereto, adds after finishing with 150-200r/min speed stirring 3-5min, stirring
The outfall drain through the chemical reaction groove after standing 1h is finished, chemical reaction groove water outlet is obtained；
S2, the valve closed between the electroplating effluent storage tank and the chemical reaction groove opens the chemical reaction groove
Outlet the entrance of the adsorption tower between, the adsorption tower outlet and the entrance of the accumulator tank between valve, adjust
First flowmeter is saved, polymerize the highly acid macropore that chemical reaction groove water outlet is flowed through with 3-4BV/h speed in the adsorption tower
Resin layer is adsorbed, and efflux finally flows into accumulator tank；
S3, closes all valves, the first sulfuric acid valve and the second sulfuric acid valve is opened, with 8% sulfuric acid with 1-
1.5BV/h speed is entered by the highly acid macroporous polymer resin bed of the adsorption tower to highly acid macroporous polymer resin
Row regeneration.
It is preferred that, above-mentioned processing method, in S1, FeSO4·7H2O dosage be every liter of chromate waste water in add 0.5-
1.0g, the dosage of the PAFC is to add 0.01-0.05g in every liter of chromate waste water.
It is preferred that, above-mentioned processing method in S2, after certain liq is collected in accumulator tank, opens elevator pump, by accumulator tank
Interior liquid transporting is to chemical reaction groove, after being mixed with chromate waste water, repeats S1-S2 mono- to twice.
It is preferred that, above-mentioned processing method, in S3, adsorption tower outflow for regeneration liquid waste, regeneration liquid waste is flow in stillpot,
PAFC is added into stillpot, is added with 150r/min speed stirring 5min after finishing, stirring finishes standing 1h,
The dosage of PAFC be every liter of chromate waste water in add 0.05g.
Compared with prior art, this practicality invention is provided a kind of electroplating wastewater of chromium processing method and processing unit, tool
There is following beneficial effect：
1st, FeSO is utilized4·7H2O is trivalent chromium to hexavalent chrome reduction in electroplating wastewater of chromium, and ferrous ions oxidation is Fe3+,
Then the highly acid macroporous polymer resin adsorption containing sulfonic acid group through Lewatit K2620 models again, removes Fe3+、Cr3+、
Na+Deng cation, other cations are not introduced in adsorption process, SO is left4 2-, after the step of repeating S1-S2 several times, return
Receive the SO in groove4 2-Accumulation, so while chrome waste water recovery utilization rate is improved, supplemented with SO in electroplating wastewater4 2-Contain
Amount.
Meanwhile, Fe2+It is oxidized to Fe3+, and Fe3+It is a kind of conventional flocculant, in order to strengthen flocculating effect in oxidation pond, this
Invention, which concentrates on two steps of redox and flocculation in one groove, reacts, and utilizes the product and flocculant of redox reaction
Polymerization oxidation ferro-aluminum formation coagulant, according to Synergistic principle, PAFC and Fe3+Recombination energy forms a kind of new
Type coagulant, so as to play good flocculating effect to heavy metal contaminants in chromate waste water.
2nd, a kind of electroplating wastewater of chromium processing method and processing unit that the present invention is provided, electroplating wastewater can be handled simultaneously
In Cr3+、Cr6+, it is not necessary to others dilution or concentration step and step is simple to operation.Adsorption effect shows chromate waste water
The content of the cations such as middle zinc, copper, iron, chromium reduces more than 93%, SO4 2-Content has increased slightly.
3rd, the regenerated liquid after regeneration of sulfuric acid highly acid macroporous polymer resin flows into stillpot, through secondary flocculation sediment, keeps away
Exempt from secondary pollution.
Brief description of the drawings
Fig. 1 is the structural representation of electroplating wastewater of chromium processing unit of the present invention.
Description of reference numerals：1. electroplating effluent storage tank, 2. chemical reaction grooves, 21. dog-houses, 3. adsorption towers, 31. highly acids
Macroporous polymer resin bed, 32. sulfuric acid entrances, 4. accumulator tanks, 41. elevator pumps, 5. valves, 6. first flowmeters, 7. monitors,
8. sulfuric acid tank, 81. second flowmeters, 82. first sulfuric acid valves, 9 stillpots, 91. second sulfuric acid valves.
Embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings, but should not be construed as the limit of the present invention
System.The test method of unreceipted actual conditions, is generally operated according to normal condition in the following example.When embodiment provides numerical value
During scope, it should be appreciated that except non-invention is otherwise noted, any one between two end points and two end points of each number range
Individual numerical value can select.Unless otherwise defined, all technologies and scientific terminology and the art technology used in the present invention
The meaning that personnel are generally understood that is identical.
The electroplating wastewater of chromium processing unit of the present invention, the Lewatit K2620 models of Lanxess Deutschland GmbH's production
The highly acid macroporous polymer resin containing sulfonic acid group, be a class ball state, possess the resin of sulfonic acid group, be sees only at present
It is in processing Cr3+Middle application, has no it in processing Cr6+Middle application.
Embodiment 1
In order to reach while handling the Cr in electroplating wastewater3+、Cr6+The purpose of ion, our application processes to the resin
Improved, have devised a kind of electroplating wastewater of chromium processing unit, it is specific as shown in figure 1, including electroplating effluent storage tank 1,
The highly acid macroporous polymer tree containing sulfonic acid group is filled with chemical reaction groove 2, adsorption tower 3 and accumulator tank 4, the adsorption tower
Lipid layer 31, between the outlet of the electroplating effluent storage tank 1 and the entrance of the chemical reaction groove 2, the chemical reaction groove 2 goes out
Mouthful and the entrance of the adsorption tower 3 between, the adsorption tower 3 outlet the entrance of the accumulator tank 4 between pass through pipeline
Connection, be equipped with valve 5 on each pipeline, and the outlet of the chemical reaction groove 2 between the entrance of the adsorption tower 3 with connecting
It is additionally provided with pipeline on first flowmeter 6, the electroplating effluent storage tank 1 and is provided with monitor 7, on the chemical reaction groove 2
Dog-house 21 is further opened with, the upper end of adsorption tower 3 is further opened with sulfuric acid entrance 32, and the sulfuric acid entrance 32 passes through the first sulfuric acid
Pipeline communication has sulfuric acid tank 8, and there are stillpot 9, the first sulfuric acid pipe in the lower end of adsorption tower 3 by the second sulfuric acid pipeline communication
It is provided with road on the sulfuric acid valve 82 of second flowmeter 81 and first, the second sulfuric acid pipeline and is provided with the second sulfuric acid valve
91。
The chemical reaction groove 2 is easy to observe, samples detection chemistry provided with observation panel, sample tap and precipitation sewage draining exit
Response situation, also allows for precipitation discharge.The exit of the chemical reaction groove 2 is provided with filter screen, and aperture of filter screen is reasonable as needed
Adjust to 80 mesh or so, filtration.
In order to reach circulating effect, connected between the upper end of chemical reaction groove 2 and the lower end of accumulator tank 4 by reflux line
It is logical, and the reflux line is provided with elevator pump 41.
It should be noted that the monitor 7 uses the metal ion on-line computing model of prior art can be with such as
The online photometer detection Fe of Testomat2000 water quality3+、Cr6+, Tianjin You Mei Environmental Protection Technology Co., Ltd YJ-Zn type zinc ions
On-line computing model detects Zn2+, the total chromium of Shenyang Qian Feng Milky Way electronic instruments Co., Ltd MD-5000Cr detections, Cr3+、Cr6+。
Embodiment 2
Based on same inventive concept, present invention also offers the side that a kind of utilization said apparatus handles electroplating wastewater of chromium
Method, comprises the following steps：
S1, electroplating effluent storage tank 1 is used to store pending electroplating wastewater of chromium, and electroplating effluent is detected using monitor 7
The total chrome content of electroplating wastewater of chromium in storage tank 1, when total chrome content is more than 8g/L, opens the electroplating effluent storage tank 1 and institute
The valve between chemical reaction groove 2 is stated, waste water is flowed into chemical reaction groove 2, whole body is adjusted with the sulfuric acid of volume fraction 30%
Be pH be 3-3.5 after, add FeSO from dog-house 214·7H2O, 20min is stirred with 260r/min speed, and stirring is finished
Afterwards, NaOH is added in then from dog-house 21 toward chemical reaction groove 2, regulation whole system pH value is 6.5-7.0, is added thereto poly-
Aluminium chloride ferrum is closed, is added with 150r/min speed stirring 5min after finishing, stirring is finished after standing 1h through the chemical reaction
The outfall drain of groove 2, obtains chemical reaction groove water outlet；
The FeSO4·7H2O dosage is that 0.5g is added in every liter of chromate waste water, and the PAFC is added
Measure to add 0.01g in every liter of chromate waste water；
S2, the valve closed between the electroplating effluent storage tank 1 and the chemical reaction groove 2 opens the chemical reaction
Groove 2 outlet the entrance of the adsorption tower 3 between, the adsorption tower 3 outlet the entrance of the accumulator tank 4 between valve
Door, is adjusted first flowmeter 6, chemical reaction groove water outlet is flowed through with 3BV/h speed strong in the adsorption tower 3, adsorption tower 3
Acid macroporous polymer resin bed 31 is to Fe3+、Cr3+Adsorbed Deng cation, efflux finally flows into accumulator tank 4.
S3, closes all valves 5, the first sulfuric acid valve 82 and the second sulfuric acid valve 91 is opened, with volume fraction 8%
Sulfuric acid is with highly acid macroporous polymer resin bed 31 of the 1BV/h speed by the adsorption tower 3, to highly acid macroporous polymer
Resin is regenerated, and is easy to next step to utilize；
At this moment adsorption tower 3 flow out for regeneration liquid waste, regeneration liquid waste is flow in stillpot 9, and polymerization is added into stillpot 9
Aluminium chloride ferrum, is added after finishing and to stir 5min with 150r/min speed, stirring finishes standing 1h, and PAFC is added
Measure to add 0.05g in every liter of chromate waste water, dispose the heavy metal ion in regenerated liquid, it is to avoid occur secondary pollution.
Embodiment 3
Based on same inventive concept, present invention also offers the side that a kind of utilization said apparatus handles electroplating wastewater of chromium
Method, comprises the following steps：
S1, the total chrome content of electroplating wastewater of chromium in electroplating effluent storage tank 1 is detected using monitor 7, when total chrome content is super
When crossing 10g/L, the valve between the electroplating effluent storage tank 1 and the chemical reaction groove 2 is opened, waste water is flowed into chemical reaction
In groove 2, after being 3-3.5 with the sulfuric acid of volume fraction 30% regulation whole system pH, FeSO is added from dog-house 214·7H2O, with
300r/min speed stirring 15min, after stirring is finished, then from dog-house 21 toward chemical reaction groove 2 in add NaOH, adjust whole
Individual system pH is 6.5-7.5, and PAFC is added thereto, is added after finishing with 200r/min speed stirring
3min, stirring finishes the outfall drain through the chemical reaction groove 2 after standing 1h, obtains chemical reaction groove water outlet；
The FeSO4·7H2O dosage is that 1.0g is added in every liter of chromate waste water, and the PAFC is added
Measure to add 0.05g in every liter of waste water；
S2, the valve closed between the electroplating effluent storage tank 1 and the chemical reaction groove 2 opens the chemical reaction
Groove 2 outlet the entrance of the adsorption tower 3 between, the adsorption tower 3 outlet the entrance of the accumulator tank 4 between valve
Door, is adjusted first flowmeter 6, chemical reaction groove water outlet is flowed through with 3.5BV/h speed in the adsorption tower 3, adsorption tower 3
Highly acid macroporous polymer resin bed 31 is to Fe3+、Cr3+Adsorbed Deng cation, efflux finally flows into accumulator tank 4.
In order to improve precipitation, adsorption treatment efficiency, after certain liq is collected in accumulator tank 4, elevator pump 41 is opened, will be returned
Liquid transporting is to chemical reaction groove 2 in receipts groove 4, after being mixed with chromate waste water, repeats S1-S2 circulation twice；
S3, closes all valves 5, the first sulfuric acid valve 82 and the second sulfuric acid valve 91 is opened, with volume fraction 8%
Sulfuric acid is polymerize with highly acid macroporous polymer resin bed 31 of the 1.5BV/h speed by the adsorption tower 3 to highly acid macropore
Resin is regenerated, and is easy to next step to utilize；
At this moment adsorption tower 3 flow out for regeneration liquid waste, regeneration liquid waste is flow in stillpot 9, and polyaluminium is added thereto
Ferro-aluminum, is added with 150r/min speed stirring 5min after finishing, stirring finishes standing 1h, and the dosage of PAFC is
0.05g is added in every liter of chromate waste water and disposes heavy metal ion in regenerated liquid, it is to avoid occurs secondary pollution.
Embodiment 4
Based on same inventive concept, present invention also offers the side that a kind of utilization said apparatus handles electroplating wastewater of chromium
Method, comprises the following steps：
S1, the total chrome content of electroplating wastewater of chromium in electroplating effluent storage tank 1 is detected using monitor 7, when total chrome content is super
When crossing 9g/L, the valve between the electroplating effluent storage tank 1 and the chemical reaction groove 2 is opened, waste water is flowed into chemical reaction
In groove 2, after being 3-3.5 with the sulfuric acid of volume fraction 30% regulation whole system pH, FeSO is added from dog-house 214·7H2O, with
250r/min speed stirring 30min, after stirring is finished, then from dog-house 21 toward chemical reaction groove 2 in add NaOH, adjust whole
Individual system pH is 7-7.5, and PAFC is added thereto, is added with 150r/min speed stirring 5min after finishing,
Stirring finishes the outfall drain through the chemical reaction groove 2 after standing 1h, obtains chemical reaction groove water outlet；
The FeSO4·7H2O dosage is that 0.5g is added in every liter of chromate waste water, and the PAFC is added
Measure to add 0.02g in every liter of waste water；
S2, the valve closed between the electroplating effluent storage tank 1 and the chemical reaction groove 2 opens the chemical reaction
Groove 2 outlet the entrance of the adsorption tower 3 between, the adsorption tower 3 outlet the entrance of the accumulator tank 4 between valve
Door, is adjusted first flowmeter 6, chemical reaction groove water outlet is flowed through with 4BV/h speed strong in the adsorption tower 3, adsorption tower 3
Acid macroporous polymer resin bed 31 is to Fe3+、Cr3+Adsorbed Deng cation, efflux finally flows into accumulator tank 4.
In order to improve precipitation, adsorption treatment efficiency, after certain liq is collected in accumulator tank 4, elevator pump 41 is opened, will be returned
Receive liquid in groove 4 and delivered to chemical reaction groove 2, after being mixed with chromate waste water, repeat S1-S2 once；
S3, closes all valves 5, the first sulfuric acid valve 82 and the second sulfuric acid valve 91 is opened, with volume fraction 8%
Sulfuric acid is polymerize with highly acid macroporous polymer resin bed 31 of the 1.2BV/h speed by the adsorption tower 3 to highly acid macropore
Resin is regenerated, and is easy to next step to utilize；
At this moment adsorption tower 3 flow out for regeneration liquid waste, regeneration liquid waste is flow in stillpot 9, and polyaluminium is added thereto
Ferro-aluminum, is added with 150r/min speed stirring 5min after finishing, stirring finishes standing 1h, and the dosage of PAFC is
0.05g is added in every liter of chromate waste water, the heavy metal ion in regenerated liquid is disposed, it is to avoid occurs secondary pollution.
In chromium electroplating process, the sulfate radical contained in the chromic anhydride used is less, and a small amount of, rational sulfate radical, which there are, to be beneficial to
The precipitation of chromium.Sulfate radical in chromium plating liquid, can generate complicated sulfuric acid chromium cation with the trivalent chromium in solution.Due to chromic acid
Strong oxidizing property, passivating film is easily formed in plated piece surface, hinders the formation of electrodeposited coating, along with chromic acid is negative with presenting
(anion), electric field action causes chromic acid with being not readily accessible to plated piece surface.Due to SO4 2-Presence, generate complicated sun
Ion, this cation runs to negative electrode in electric field action and promotes alkali formula chromic acid chromium thin film (passivating film) to dissolve, and makes chromate ion
It can be discharged and precipitating metal chromium on negative electrode.But it is due to that chromium plating heats 60 degree or so, and produces gas, causes solution evaporation to damage
Lose, need to often add water supplement, if SO in the aqueous solution of supplement4 2-Content is not enough.
The FeSO that we add in chemical reaction groove 24·7H2O and sulfuric acid not only can be by Cr6+It is reduced to Cr3+, leave
SO4 2-As chrome waste water flows through the Cr in highly acid macroporous polymer resin bed 31, chrome waste water together3+It is adsorbed Deng cation,
The Fe remained in chemical reaction pond3+、Cr3+Deng anionic current through adsorption tower 3, adsorbed, leave SO4 2-, by repeating several times
After the step of S1-S2, the SO in accumulator tank 44 2-Accumulation, so while chrome waste water recovery utilization rate is improved, supplemented with
SO in electroplating wastewater4 2-Content.Meanwhile, Fe2+It is oxidized to Fe3+, and Fe3+It is a kind of conventional flocculant, in order to strengthen in oxidation pond
Flocculating effect, a certain amount of PAFC and Fe are added into oxidation pond3+Use cooperatively, according to Synergistic principle, gather
Close aluminium chloride ferrum and Fe3+Recombination energy forms a kind of new and effective coagulant, so as to be played to heavy metal contaminants in chromate waste water
Good flocculating effect.
Adsorption effect is tested：
The chromium electroplating wastewater of Qu Liangge factories, is handled according to the method for embodiment 2, collects the liquid in accumulator tank 4,
Then respectively with spectrophotometry Electroplating Wastewater acid anhydride (HCrO before and after the processing4 -)、Fe3+、Cr6+、Cr3+、SO4 2-、Na+、
Ni+、Cu2+、Zn2+Content, as a result as mark 1 shown in.Adsorption effect shows containing for the cations such as zinc in chromate waste water, copper, iron, chromium
Amount reduces more than 93%.
Each ion concentration (g/L) of table 1
, but those skilled in the art once know basic creation although preferred embodiments of the present invention have been described
Property concept, then can make other change and modification to these embodiments.So, appended claims are intended to be construed to include excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (7)
1. a kind of electroplating wastewater of chromium processing unit, it is characterised in that including electroplating effluent storage tank (1), chemical reaction groove (2),
The highly acid macroporous polymer resin bed containing sulfonic acid group is filled with adsorption tower (3) and accumulator tank (4), the adsorption tower
(31), between the outlet of the electroplating effluent storage tank (1) and the entrance of the chemical reaction groove (2), the chemical reaction groove (2)
Outlet and the adsorption tower (3) entrance between, between the entrance of the outlet of the adsorption tower (3) and the accumulator tank (4)
Valve (5), outlet and the adsorption tower of the chemical reaction groove (2) are equipped with by pipeline communication, and on each pipeline
(3) it is additionally provided with the pipeline connected between entrance on first flowmeter (6), the electroplating effluent storage tank (1) and is provided with prison
Survey on instrument (7), the chemical reaction groove (2) and be further opened with dog-house (21), adsorption tower (3) upper end is further opened with sulfuric acid and entered
Mouth (32), the sulfuric acid entrance (32) has sulfuric acid tank (8) by the first sulfuric acid pipeline communication, and adsorption tower (3) lower end passes through
Second sulfuric acid pipeline communication has is provided with second flowmeter (81) and the first sulfuric acid on stillpot (9), the first sulfuric acid pipeline
The second sulfuric acid valve (91) is provided with valve (82), the second sulfuric acid pipeline.
2. electroplating wastewater of chromium processing unit according to claim 1, it is characterised in that on the chemical reaction groove (2)
Provided with observation panel, sample tap and precipitation sewage draining exit.
3. electroplating wastewater of chromium processing unit according to claim 1, it is characterised in that the chemical reaction groove (2)
Connected between upper end and the lower end of accumulator tank (4) by reflux line, and the reflux line is provided with elevator pump (41).
4. the processing method of electroplating wastewater of chromium processing unit according to claim 1, it is characterised in that including following step
Suddenly：
S1, the total chrome content of electroplating wastewater of chromium in electroplating effluent storage tank (1) is detected using monitor (7), when total chrome content reaches
During to finite concentration, the valve between the electroplating effluent storage tank (1) and the chemical reaction groove (2) is opened, makes chromium containing electroplating
Waste water is flowed into chemical reaction groove (2), after being 3-3.5 with 30% sulfuric acid regulation whole system pH, is added from dog-house (21)
FeSO4·7H2O, 15-30min is stirred with 250-300r/min speed, after stirring is finished, then is thrown toward chemical reaction groove (2) is interior
Plus NaOH, regulation whole system pH value is 6.5-7.5, and PAFC is added thereto, is added after finishing with 150-200r/
Min speed stirring 3-5min, stirring finishes the outfall drain through the chemical reaction groove (2) after standing 1h, obtains chemical anti-
Answer groove water outlet；
S2, the valve closed between the electroplating effluent storage tank (1) and the chemical reaction groove (2) opens the chemical reaction
Between the outlet of groove (2) and the entrance of the adsorption tower (3), the entrance of the outlet of the adsorption tower (3) and the accumulator tank (4)
Between valve, regulation first flowmeter (6), chemical reaction groove water outlet is flowed through the adsorption tower (3) with 3-4BV/h speed
In highly acid macroporous polymer resin bed (31) adsorbed, efflux finally flows into accumulator tank (4)；
S3, closes all valves (5), opens the first sulfuric acid valve (82) and the second sulfuric acid valve (91), with 8% sulfuric acid with
1-1.5BV/h speed is polymerize by the highly acid macroporous polymer resin bed (31) of the adsorption tower (3) to highly acid macropore
Resin is regenerated.
5. processing method according to claim 4, it is characterised in that in S1, FeSO4·7H2O dosage is every liter and contained
Add 0.5-1.0g in chrome waste water, the dosage of the PAFC is to add 0.01-0.05g in every liter of chromate waste water.
6. processing method according to claim 5, it is characterised in that in S2, when collection certain liq in accumulator tank (4)
Afterwards, elevator pump (41) is opened, by accumulator tank (4) interior liquid transporting to chemical reaction groove (2), after being mixed with chromate waste water, is repeated
S1-S2 mono- is to twice.
7. processing method according to claim 5, it is characterised in that in S3, adsorption tower (3) outflow for regeneration liquid waste,
Regeneration liquid waste is flow in stillpot (9), is added PAFC into stillpot (9), is added after finishing with 150r/min's
Speed stirs 5min, and stirring finishes standing 1h, and the dosage of PAFC is to add 0.05g in every liter of chromate waste water.
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| CN108275814A (en) * | 2017-12-19 | 2018-07-13 | 中山市雅乐思商住电器有限公司 | A kind of equipment for processing industrial sewage |
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| CN101560028A (en) * | 2009-05-25 | 2009-10-21 | 广州市市政工程设计研究院 | Sewage physicochemical treatment method and device |
| CN102154681A (en) * | 2011-05-06 | 2011-08-17 | 邱峰 | Method for purifying hexavalent chromium electroplating waste liquid and device |
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