CN205241417U - Electroplate chromium -containing wastewater processing system - Google Patents
Electroplate chromium -containing wastewater processing system Download PDFInfo
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- CN205241417U CN205241417U CN201521107985.4U CN201521107985U CN205241417U CN 205241417 U CN205241417 U CN 205241417U CN 201521107985 U CN201521107985 U CN 201521107985U CN 205241417 U CN205241417 U CN 205241417U
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- flocculation
- treatment system
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- containing chromium
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Abstract
The utility model relates to an electroplate chromium -containing wastewater processing system, include and go back original mounting, neutralization pond, flocculation basin, buffer pool, separate tank through consecutive equalizing basin, acidizing pond, the electricity flocculation of pipeline, set up sludge bucket in the buffer pool, set up filter equipment in the separate tank, set up agitating mixing apparatus respectively in equalizing basin, acidizing pond, neutralization pond, flocculation basin, buffer pool. The utility model discloses can effectively solve the present chromium -containing wastewater of electroplating processing method chemical reduction method poor stability, medicament commonly used and throw that the dosage is big, the high scheduling problem of running cost.
Description
Technical field
The utility model relates to a kind of waste electroplating liquor containing chromium treatment system.
Background technology
Chromate waste water is that electroplating industry produces one larger waste water of the water yield, the total chromium and the sexavalence that wherein containChromium is all first kind pollutants, extremely serious to environment and ecological pollution, is the pollutant that country keeps under strict controlIndex. According to the newest standards of national electroplating industry pollutant emission " plating pollutant emission standard "(GB21900～2008), table 3 wherein specifies that (this is that at present domestic new batch of plating construction project generally heldThe standard of row), require Cr VI≤0.1mg/L, total chromium≤0.5mg/L.
For the processing of chromate waste water, conventional processing method has chemical reduction method, electrolysis, ion-exchangeMethods etc., wherein chemical reduction method is the method the most generally using. Chemical reduction method is by acid conditionUnder, hexavalent chrome reduction is become trivalent chromium by additional reducing agent, then makes chromium form insoluble Cr by adding alkali(OH) 3, then remove by sedimentation basin. Conventional reducing agent has sodium sulfite, sodium hydrogensulfite, Jiao YaSodium sulphate, ferrous sulfate etc. The reducing agent of chemical reduction method is additional, accurately the adding of dosingDifficulty is larger, for ensureing that treatment effect often needs excessive adding, can waste a certain amount of reducing agent, reductionThe configuration of agent also needs to increase artificial; After reduction, add in addition the insoluble Cr (OH) 3 that alkali generates, need by heavyPond, shallow lake precipitation is removed, and for ensureing sedimentation effect, precipitation often also needs to add relatively large flocculant, and this alsoIncrease the consumption of medicament. Chemical reduction method is subject to variation water quality, added amount of chemical, reaction effect control journeyThe impact of the factors such as degree, sedimentation effect is larger, and stability is relatively poor. According to " electroplating pollutant emissionStandard " Cr VI≤0.1mg/L of specifying of (GB21900～2008) table 3, chromium≤0.5mg/L, processes effectFruit is controlled bad a little, is about to cause waste water to exceed standard.
Utility model content
The purpose of this utility model is to provide a kind of waste electroplating liquor containing chromium treatment system, solves existing plating and containsConventional chemical reduction method poor stability, the added amount of chemical of chrome waste water treatment system is large, operating cost is highProblem.
The utility model solves the technical scheme that its technical problem adopts: a kind of waste electroplating liquor containing chromium placeReason system, comprises the regulating reservoir, acidification pool, electricity flocculation reduction apparatus, the neutralization that are connected successively by pipelinePond, flocculation basin, Buffer Pool, separate tank arrange sludge bucket in Buffer Pool, in separate tank, arrangeFilter device arranges and is uniformly mixed respectively in regulating reservoir, acidification pool, neutralization pond, flocculation basin, Buffer PoolDevice.
Preferably, electricity flocculation reduction apparatus is provided with the automatic pouring extra-high voltage pulse power and irony battery lead plate.
Further reduce the dosage of flocculant, also comprised the sludge reflux that connects separate tank and flocculation basinPipeline, is provided with sludge reflux pump on sludge return pipe.
In order better to control the addition of NaOH and sulfuric acid, be also provided with and acidification pool, neutralization pond phaseAdaptive online PH control device.
Filter is submerged ultrafiltration assembly.
Preferably, also comprise the filtration suction pump for waste discharge being connected with separate tank.
Preferably, on the pipeline between regulating reservoir and acidification pool, be provided with elevator pump.
The beneficial effects of the utility model: with electricity flocculation reduction apparatus, replace the side of traditional additional reducing agentMethod, without additional reducing agent, reduction effect is better; Replace sedimentation basin, the outlet effect utmost point with film separate tankIt is stable, is not subject to the impact of the factors such as variation water quality, medicament reaction be not good, and without adding a large amount of flocculationsAgent; The sludge reflux of separate tank, to flocculation basin, has further reduced the dosage of flocculant, saves medicamentCost.
Below with reference to drawings and Examples, the utility model is described in detail.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
Embodiment 1, a kind of waste electroplating liquor containing chromium treatment system as shown in Figure 1, comprises by pipeline successivelyConnected regulating reservoir 1, acidification pool 2, electricity flocculation reduction apparatus 3, neutralization pond 4, flocculation basin 5, Buffer Pool6, separate tank 7, at the interior sludge bucket 10 that arranges of Buffer Pool 6, at the interior filter 8 that arranges of separate tank 7,In regulating reservoir 1, acidification pool 2, neutralization pond 4, flocculation basin 5, Buffer Pool 6, arrange and be uniformly mixed respectivelyDevice 9. Electricity flocculation reduction apparatus 3 is provided with the automatic pouring extra-high voltage pulse power and irony battery lead plate. Also bagDraw together the sludge return pipe that connects separate tank 7 and flocculation basin 5, on sludge return pipe, be provided with mud and returnStream pump 12. Also be provided with and acidification pool 2, the suitable online PH control device 11 of neutralization pond 4. CrossFilter device 8 is submerged ultrafiltration assembly. Also comprise the mistake for waste discharge being connected with separate tank 7Filter suction pump 13. On pipeline between regulating reservoir 1 and acidification pool 2, be provided with elevator pump 14.
Embodiment 2, a kind of waste electroplating liquor containing chromium processing method as described in Figure 1, comprises the steps:
Step (1) regulating water quality: the chromate waste water first electroplating workshop being produced first enters in regulating reservoir 1,By the abundant regulating water quality water yield of mixing stirring device 9;
Step (2) acidifying: the waste water after step (1) regulates is sent into acidifying by elevator pump 14In pond 2; By online pH control device 11 automatic feeding sulfuric acid, control acidification pool 2 at acidification pool 2Interior pH value, 2.5, after rapid stirring mixes, is reacted 5min;
Step (3) electricity flocculation reduction is processed: the waste water after acidifying is sent into electricity flocculation reduction apparatus 3; UselessThe reaction time of water in electricity flocculation reduction apparatus 3 is 20min; Electricity flocculation reduction apparatus adopts the automatic pouring utmost pointHigh-voltage pulse power source, battery lead plate adopts iron plate, under the effect of electric current, produces a large amount of ferrous ions and heightActive hydrogen, these two kinds of materials all have extremely strong reproducibility, can be by whole the Cr VI in chromate waste waterBe reduced into trivalent chromium;
Step (4) neutralization reaction: flocculation reduction waste water after treatment is sent in neutralization pond 4; In neutralizationPond 4 is by online pH control device 11 automatic feeding NaOH, and the pH value of controlling in neutralization pond 4 exists8.5, after rapid stirring mixes, reaction 5min;
Step (5) flocculation treatment: the waste water after neutralization reaction is sent into flocculation basin 5; In flocculation basin 5Add high polymer coagulant, the dosage of high polymer coagulant is by 2mg/L, and stirring fully, reaction15min；
Step (6) buffered: the wastewater streams after flocculation treatment is sent in Buffer Pool 6; Waste water entersThe rear mud of Buffer Pool 6 precipitates at this, and mud is discharged via sludge bucket 10; Waste water is in the time that Buffer Pool 6 stopsBetween be 60min;
Step (7) filtration treatment: the waste water after buffered is sent in separate tank 7, filled by filterPut 8 and carry out filtration treatment, and the waste water after filtering is discharged by filter suction pump 13 self-separation ponds 7; CutThe mud of staying in separate tank 7 is back in flocculation basin 5 through sludge return pipe by sludge reflux pump 12.
Embodiment 3: a kind of waste electroplating liquor containing chromium processing method as shown in Figure 1, comprises the steps:
Step (1) regulating water quality: the chromate waste water first electroplating workshop being produced first enters in regulating reservoir 1,By the abundant regulating water quality water yield of mixing stirring device 9;
Step (2) acidifying: the waste water after step (1) regulates is sent into acidifying by elevator pump 14In pond 2; By online pH control device 11 automatic feeding sulfuric acid, control acidification pool 2 at acidification pool 2Interior pH value, 2.7, after rapid stirring mixes, is reacted 7.5min;
Step (3) electricity flocculation reduction is processed: the waste water after acidifying is sent into electricity flocculation reduction apparatus 3; UselessThe reaction time of water in electricity flocculation reduction apparatus 3 is 25min; Electricity flocculation reduction apparatus adopts the automatic pouring utmost pointHigh-voltage pulse power source, battery lead plate adopts iron plate, under the effect of electric current, produces a large amount of ferrous ions and heightActive hydrogen, these two kinds of materials all have extremely strong reproducibility, can be by whole the Cr VI in chromate waste waterBe reduced into trivalent chromium;
Step (4) neutralization reaction: flocculation reduction waste water after treatment is sent in neutralization pond 4; In neutralizationPond 4 is by online pH control device 11 automatic feeding NaOH, and the pH value of controlling in neutralization pond 4 exists8.7, after rapid stirring mixes, reaction 7.5min;
Step (5) flocculation treatment: the waste water after neutralization reaction is sent into flocculation basin 5; In flocculation basin 5Add high polymer coagulant, the dosage of high polymer coagulant is by 3.5mg/L, and stirring fully, anti-Answer 17.5min;
Step (6) buffered: the wastewater streams after flocculation treatment is sent in Buffer Pool 6; Waste water entersThe rear mud of Buffer Pool 6 precipitates at this, and mud is discharged via sludge bucket 10; Waste water is in the time that Buffer Pool 6 stopsBetween be 75min;
Step (7) filtration treatment: the waste water after buffered is sent in separate tank 7, filled by filterPut 8 and carry out filtration treatment, and the waste water after filtering is discharged by filter suction pump 13 self-separation ponds 7; CutThe mud of staying in separate tank 7 is back in flocculation basin 5 through sludge return pipe by sludge reflux pump 12.
Embodiment 4: a kind of waste electroplating liquor containing chromium processing method as shown in Figure 1, comprises the steps:
Step (1) regulating water quality: the chromate waste water first electroplating workshop being produced first enters in regulating reservoir 1,By the abundant regulating water quality water yield of mixing stirring device 9;
Step (2) acidifying: the waste water after step (1) regulates is sent into acidifying by elevator pump 14In pond 2; By online pH control device 11 automatic feeding sulfuric acid, control acidification pool 2 at acidification pool 2Interior pH value, 3.0, after rapid stirring mixes, is reacted 10min;
Step (3) electricity flocculation reduction is processed: the waste water after acidifying is sent into electricity flocculation reduction apparatus 3; UselessThe reaction time of water in electricity flocculation reduction apparatus 3 is 30min; Electricity flocculation reduction apparatus adopts the automatic pouring utmost pointHigh-voltage pulse power source, battery lead plate adopts iron plate, under the effect of electric current, produces a large amount of ferrous ions and heightActive hydrogen, these two kinds of materials all have extremely strong reproducibility, can be by whole the Cr VI in chromate waste waterBe reduced into trivalent chromium;
Step (4) neutralization reaction: flocculation reduction waste water after treatment is sent in neutralization pond 4; In neutralizationPond 4 is by online pH control device 11 automatic feeding NaOH, and the pH value of controlling in neutralization pond 4 exists9.0, after rapid stirring mixes, reaction 10min;
Step (5) flocculation treatment: the waste water after neutralization reaction is sent into flocculation basin 5; In flocculation basin 5Add high polymer coagulant, the dosage of high polymer coagulant is by 5mg/L, and stirring fully, reaction20min；
Step (6) buffered: the wastewater streams after flocculation treatment is sent in Buffer Pool 6; Waste water entersThe rear mud of Buffer Pool 6 precipitates at this, and mud is discharged via sludge bucket 10; Waste water is in the time that Buffer Pool 6 stopsBetween be 90min;
Step (7) filtration treatment: the waste water after buffered is sent in separate tank 7, filled by filterPut 8 and carry out filtration treatment, and the waste water after filtering is discharged by filter suction pump 13 self-separation ponds 7; CutThe mud of staying in separate tank 7 is back in flocculation basin 5 through sludge return pipe by sludge reflux pump 12.
Embodiment 5: a kind of waste electroplating liquor containing chromium processing method as shown in Figure 1, comprises the steps:
Step (1): arrange successively connected regulating reservoir 1, acidification pool 2, electricity flocculation reduction apparatus 3, inWith pond 4, flocculation basin 5, Buffer Pool 6, separate tank 7, at the interior sludge bucket 10 that arranges of Buffer Pool 6, dividingThe interior filter 8 that arranges from pond 7, in regulating reservoir 1, acidification pool 2, neutralization pond 4, flocculation basin 5, bufferingMixing stirring device 9 is set respectively in pond 6;
Step (2) regulating water quality: the chromate waste water first electroplating workshop being produced first enters regulating reservoir 1 is logicalCross the abundant regulating water quality water yield of mixing stirring device 9;
Step (3) acidifying: the waste water after step (1) regulates is sent in acidification pool 2; In acidChange pond 2 and add sulfuric acid, control pH value in acidification pool 2 between 2.5～3.0, after rapid stirring mixing,Reaction 5～10min;
Step (4) electricity flocculation reduction is processed: the waste water after step (3) acidifying is sent into electricity flocculationReduction apparatus 3; Electricity flocculation reduction apparatus 3 adopts the automatic pouring extra-high voltage pulse power, and battery lead plate adopts iron plate,The reaction time of waste water in electricity flocculation reduction apparatus 3 is 20～30min; Electricity flocculation reduction apparatus adopts certainlyThe moving pulse power of falling extra-high voltage, battery lead plate adopts iron plate, under the effect of electric current, produce a large amount of ferrous irons fromSub and highly active hydrogen, these two kinds of materials all have extremely strong reproducibility, can be by the sexavalence in chromate waste waterChromium Restore All becomes trivalent chromium;
Step (5) neutralization reaction: will send into neutralization through step (4) flocculation reduction waste water after treatmentIn pond 4; Add NaOH at neutralization pond 4, control pH value in neutralization pond 4 between 8.5～9.0,After rapid stirring mixes, reaction 5～10min;
Step (6) flocculation treatment: the waste water after step (5) neutralization reaction is sent into flocculation basin 5;In flocculation basin 5, add high polymer coagulant, the dosage of high polymer coagulant is by 2～5mg/L, andStir fully reaction 15～20min;
Step (7) buffered: the wastewater streams after step (6) flocculation treatment is sent into Buffer Pool 6In; Waste water enters the rear mud of Buffer Pool 6 and precipitates at this, and mud is discharged via sludge bucket 10; Waste water is slowRushing 6 time of staying of pond is 60～90min;
Step (8) filtration treatment: the waste water after step (8) buffered is sent into separate tank 7Inner filtration processing, the waste water after filtration is discharged, and sludge retention is in separate tank 7.
Also comprise the recycling of step (9) mud: will, after step (8), be trapped in separate tank 7Interior sludge reflux is to flocculation basin 5.
In step (1), be also provided with acidification pool 2, the suitable online PH of neutralization pond 4 and control dressPut 11, the NaOH's in the addition of the sulfuric acid in step (3) acidifying and step (4) neutralization reactionAddition is by online pH control device 11 automatic feedings.
Filter 8 is submerged ultrafiltration assembly, in step (8) filtration treatment, by separate tankThe 7 interior submerged ultrafiltration assemblies that arrange carry out filtration treatment.
In step (1), be also provided with sludge reflux pump 12, in step 9, pass through sludge reflux pump 12Mud self-separation pond 7 is back in flocculation basin 5.
In step (1), be also provided with and filter suction pump 13, in step 8, pass through to filter suction pump 13To in waste water self-separation pond 7, discharge.
In step (1), be also provided with elevator pump 14, elevator pump 14 is arranged on the bottom of regulating reservoir 1,In step 3, by elevator pump 14, the waste water after step 1 regulates is sent in acidification pool 2.
In embodiment 1 to 5, by being set, regulating reservoir regulates, and regulating reservoir volume size is next fillingProduce the total Water of order of classes or grades at school (being generally 8 hours) and be advisable, the mixed stirring device in regulating reservoir can be airOr mechanical mixture device. The object of the regulating water quality water yield is the ripple of avoiding water quality and the water yield in production processMoving, the treatment system of chromate waste water is impacted. The dosage of high polymer coagulant is by 2～5mg/L ",Be that the amount that adds medicament in 1L waste water is 2～5mg.
Following table is the contrast form of each performance parameter of the utility model and traditional handicraft.
Claims (7)
1. a waste electroplating liquor containing chromium treatment system, is characterized in that: comprise by pipeline be successively connectedRegulating reservoir (1), acidification pool (2), electricity flocculation reduction apparatus (3), neutralization pond (4), flocculation basin (5),Buffer Pool (6), separate tank (7) arrange sludge bucket (10) in Buffer Pool (6), in separate tank (7)Filter (8) is inside set, regulating reservoir (1), acidification pool (2), neutralization pond (4), flocculation basin (5),Mixing stirring device (9) is set respectively in Buffer Pool (6).
2. waste electroplating liquor containing chromium treatment system according to claim 1, is characterized in that: electricity flocculationReduction apparatus (3) is provided with the automatic pouring extra-high voltage pulse power and irony battery lead plate.
3. waste electroplating liquor containing chromium treatment system according to claim 1, is characterized in that: also compriseThe sludge return pipe that connects separate tank (7) and flocculation basin (5), is provided with dirt on sludge return pipeMud reflux pump (12).
4. waste electroplating liquor containing chromium treatment system according to claim 1, is characterized in that: also arrangeHave and acidification pool (2), the suitable online PH control device (11) of neutralization pond (4).
5. waste electroplating liquor containing chromium treatment system according to claim 1, is characterized in that: filter dressPut (8) for submerged ultrafiltration assembly.
6. according to the waste electroplating liquor containing chromium treatment system described in claim 1 to 5 any one, its featureBe: also comprise the filtration suction pump (13) for waste discharge being connected with separate tank (7).
7. waste electroplating liquor containing chromium treatment system according to claim 6, is characterized in that: regulating reservoir(1) on the pipeline and between acidification pool (2), be provided with elevator pump (14).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521107985.4U CN205241417U (en) | 2015-12-24 | 2015-12-24 | Electroplate chromium -containing wastewater processing system |
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| CN201521107985.4U CN205241417U (en) | 2015-12-24 | 2015-12-24 | Electroplate chromium -containing wastewater processing system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105540951A (en) * | 2015-12-24 | 2016-05-04 | 广东水清环保科技有限公司 | Electroplate chromate waste water treatment system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105540951A (en) * | 2015-12-24 | 2016-05-04 | 广东水清环保科技有限公司 | Electroplate chromate waste water treatment system and method |
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