CN105347546B - A kind of processing method and its system of pyrite-based sulfuric acid production waste water - Google Patents
A kind of processing method and its system of pyrite-based sulfuric acid production waste water Download PDFInfo
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- CN105347546B CN105347546B CN201510731142.XA CN201510731142A CN105347546B CN 105347546 B CN105347546 B CN 105347546B CN 201510731142 A CN201510731142 A CN 201510731142A CN 105347546 B CN105347546 B CN 105347546B
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
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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
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Abstract
The invention discloses a kind of processing method and its system of pyrite-based sulfuric acid production waste water, belong to acid-bearing wastewater processing technology field.This method includes：Waste water is by processing such as oxidation processes, pretreatment, first order reaction, one-level flocks, one-level sedimentation, second order reaction, two level flocks, two level sedimentation, third-order reaction, three-level flocks and three-level sedimentations, waste water arsenic average content after processing is 0.26mg/L, separating by extraction is more than >=99%, fluorine removal efficiency is more than 90%, Pb, Cd, Cr and Hg etc. content are all relatively low, meet national standard, somewhat handling not handling either can discharge or recycling.
Description
Technical field
The invention belongs to acid-bearing wastewater processing technology field, the processing method of more particularly to a kind of pyrite-based sulfuric acid production waste water and
Its system.
Background technology
Substantial amounts of SO can be produced in metal sulfide smelting process2 Flue gas, part SO2 Flue gas is generally by smelting cigarette
Gas acid-making process prepares sulfuric acid, and the widely used wet scrubbing gas cleaning of fume purifying processes in metallurgical off-gas acid-making technique
Technology carries out SO2Gas cleaning.Due to SO2Contain a large amount of objectionable impurities in flue gas, including the weight such as arsenic and copper, lead, cadmium
Metal ion, especially arsenic content are higher.The part objectionable impurities is deposited in washing process in circulation washings, the circulation
Washings are again due to absorbing the SO in flue gas2 Form acid waste water.In order to reduce infringement of the harmful ion to cleaning procedure, the portion
Acid waste water is divided to need periodically to discharge from acid making system, due to containing more objectionable impurities, causing the acid waste water can not
Recycling, directly outer row can cause environmental pollution again, therefore need to carry out neutralization improvement to it.At present, to the acid waste water
Neutralization to administer widely used be lime neutralisation, but the technique has a large amount of waste residues and produced, and add solid dust and
Particulate matter can damage to environment.The treatment effect of this method heavy metal is bad simultaneously, can not reach discharge standard sometimes.
It is used to enter spent acid in addition, Application No. 201420764402.4 provides a kind of pyrite-based sulphuric acid plant sulfate slag dearsenification system
Row dearsenification is handled, applicant have discovered that it has problems with：
1st, it is simply good to the removal effect of arsenic, and it is bad to F, Pb, Cd, Cr and Hg therein removal effect；
2nd, dearsenification effect is not ideal that the supernatant precipitated through the system is less than national standard 0.5mg/ containing arsenic concentration
L, but also have the space declined, the appearance of new national standard is possible to not reach discharge standard；
3rd, various heavy is contained in the solid waste after handling, bad processing, the composition in sludge-tank is very multiple several times
It is miscellaneous, if the intractability that mixes is larger.
The content of the invention
In order to solve the above problems, the embodiments of the invention provide a kind of processing method of pyrite-based sulfuric acid production waste water and its it is
System.The technical scheme is as follows：
On the one hand, the embodiments of the invention provide a kind of processing method of pyrite-based sulfuric acid production waste water, comprise the following steps：
A, liquor natrii hypochloritis is added in waste water and carries out oxidation reaction, control the pH value of waste water to be less than 2, the hypochlorous acid
The concentration of sodium solution is 5-15wt%, and the volume ratio of the liquor natrii hypochloritis and waste water is 0.25-0.5:1；Sent after the completion of reaction
Step b.
B, milk of lime is added in the waste water that step a is obtained makes the pH value of waste water be 6.5-7.
C, copper-bath is added in the waste water that step b is obtained and sodium hydroxide solution carries out precipitation reaction, control is useless
The pH value of water is 7-7.5, and the volume ratio of the copper-bath and sodium hydroxide solution is 0.5-0.8:1, the sodium hydroxide
The concentration of solution is 20-40wt%, and the concentration of the copper-bath is 1-1.5wt%；Step d is sent after the completion of reaction.
D, cation flocculant is added in the waste water that step c is obtained and carries out flocks processing, is precipitated after the completion of flocks,
The cation flocculant and the volume ratio of the step c copper-baths used are 0.5-1:1, the cation flocculant it is dense
Spend for 0.25-0.35wt%；Supernatant send step e.
E, copper-bath is added in the clear liquid obtained after step d precipitations and carries out precipitation reaction, the sulphur used in step e
Sour copper solution and the volume ratio of the step c copper-baths used are 0.6-0.75:1, the concentration of the copper-bath is 1-
1.5wt%；Step f is sent after the completion of reaction.
F, sodium hydroxide solution is added in the waste water that step e is obtained, controls the pH value 7.5-8.2 of waste water.
G, anion flocculant is added in the waste water that step f is obtained and carries out flocks processing, is precipitated after the completion of flocks,
The volume ratio of the anion flocculant and the step d cation flocculants used is 0.7-0.85:1, the anion flocks
The concentration of agent is 0.25-0.35wt%；Supernatant send step h.
h：Sodium hydroxide solution is added in the clear liquid obtained after step g precipitations and copperas solution precipitate instead
Should, the volume ratio of the copperas solution used in control ph 8.2-8.7, step h and the step c copper-baths used is
0.8-1.2:1, the concentration of the copperas solution is 0.8-1.3wt%；Step i is sent after the completion of reaction.
i：Anion flocculant is added in the waste water that step h is obtained and carries out flocks processing, is precipitated after the completion of flocks,
The volume ratio of the anion flocculant and the step d cation flocculants used is 0.1-0.5:1, the anion flocculant
Concentration be 0.25-0.35wt%；Supernatant send step j.
j：By the obtained clear liquid dischargings of step i or recycling.
Preferably, precipitation merging treatment step g and i obtained.
Specifically, in step a, the concentration of the liquor natrii hypochloritis is 10wt%, the liquor natrii hypochloritis and waste water
Volume ratio be 0.33:1.
Specifically, in step c and e, the concentration of the copper-bath is 1.3wt%.
Preferably, in step f, control ph 8.
Preferably, in step h, the concentration of the copperas solution is 1.2wt%, control ph 8.5.
Specifically, in step d, the concentration of the cation flocculant is 0.3wt%；In step g and i, it is described it is cloudy from
The concentration of sub- flocculant is 0.3wt%.
Wherein, in step c, f and h, the concentration of the sodium hydroxide solution is 33wt%.
On the other hand, the embodiment of the present invention additionally provides a kind of processing system of pyrite-based sulfuric acid production waste water, and the system includes
Sludge-tank, copper sulphate adding set, ferric sulfate adding set, alkali adding set, cationic flocculant adding set, anion wadding
Solidifying agent adding set and the oxidation reaction pond being sequentially connected, pretreatment pool, first order reaction pond, one-level coagulating basin, first stage precipitation tank,
Second order reaction pond, two-stage coagulation pond, two level flocculation basin, second-level settling pond, third-order reaction pond, three-level coagulating basin and three-level precipitate
Pond, the copper sulphate adding set are connected with first order reaction pond and second order reaction pond, and the ferric sulfate adding set and three-level are anti-
Pond is answered to connect, the sludge-tank is connected with first stage precipitation tank, second-level settling pond and three-level sedimentation basin, the alkali adding set and one
Order reaction pond, two-stage coagulation pond are connected with third-order reaction pond, and the cationic flocculant adding set is connected with one-level coagulating basin,
The Flokal B adding set is connected with two level flocculation basin and three-level coagulating basin.
Preferably, the sludge-tank in the embodiment of the present invention includes the first sludge-tank and the second sludge-tank, first sludge
Pond is connected with first stage precipitation tank, and second sludge-tank is connected with second-level settling pond and three-level sedimentation basin.
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought is：The embodiments of the invention provide a kind of sulphur iron
The processing method and its system of ore deposit Wastewater from Acid Preparation, this method include：Waste water is by oxidation processes, pretreatment, first order reaction, one-level
The processing such as flocks, one-level sedimentation, second order reaction, two level flocks, two level sedimentation, third-order reaction, three-level flocks and three-level sedimentation, place
Waste water arsenic average content after reason is 0.26mg/L, and separating by extraction is more than >=99%, and fluorine removal efficiency is more than 90%, Pb, Cd, Cr, Hg
Deng content it is all relatively low, meet national standard, somewhat handling not handling either can discharge or recycling.
Brief description of the drawings
Fig. 1 is the structured flowchart of the processing system of pyrite-based sulfuric acid production waste water provided in an embodiment of the present invention.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made into one below in conjunction with accompanying drawing
It is described in detail on step ground.
Embodiment 1
Referring to Fig. 1, embodiment 1 provides a kind of processing system of pyrite-based sulfuric acid production waste water, and the system includes sludge-tank, sulphur
Sour copper adding set 14, ferric sulfate adding set 18, alkali adding set 16, cationic flocculant adding set 13, anion wadding
Solidifying agent adding set 17 and the oxidation reaction pond 1 being sequentially connected, pretreatment pool 2, first order reaction pond 3, one-level coagulating basin 4, one-level
Sedimentation basin 5, second order reaction pond 6, two-stage coagulation pond 7, two level flocculation basin 8, second-level settling pond 9, third-order reaction pond 10, three-level coagulation
Pond 11 and three-level sedimentation basin 12 etc..Wherein, copper sulphate adding set 14 is connected with first order reaction pond 3 and second order reaction pond 6, sulfuric acid
Iron adding set 18 is connected with third-order reaction pond 10.Sludge-tank and first stage precipitation tank 5, second-level settling pond 9 and three-level sedimentation basin 12
Connection.Alkali adding set 16 is connected with first order reaction pond 3, two-stage coagulation pond 7 and third-order reaction pond 10, cationic flocculant addition
Device 13 is connected with one-level coagulating basin 4, and Flokal B adding set 17 connects with two level flocculation basin 8 and three-level coagulating basin 11
Connect.Wherein, alkali adding set 16 is used to provide sodium hydroxide solution, and copper sulphate adding set 14 is used to provide copper-bath,
Ferric sulfate adding set 18 is used to provide ferrum sulfuricum oxydatum solutum or polymeric ferrous sulphate solution.Oxidation reaction pond 1 be used for by waste water with time
Sodium chlorate solution reacts, and pretreatment pool 2 uses the pH value of milk of lime adjustment waste water, first order reaction pond 3, second order reaction pond 6 and three
Order reaction pond 10 is used to react waste water and copper-bath or ferrum sulfuricum oxydatum solutum, and one-level coagulating basin 4 is used to flocculate with cation
Agent is reacted, and two-stage coagulation pond 7 is used to react with alkali, and two level flocculation basin 8 is used to react with Flokal B, three-level coagulating basin 11
For being reacted with a small amount of Flokal B.First stage precipitation tank 5, second-level settling pond 9 and three-level sedimentation basin 12 are used for through wadding
Waste liquid after solidifying is precipitated, and upper cleaning is output in the reaction tank of next stage, and the supernatant of three-level sedimentation basin 12 reaches
Discharge or the standard recycled.Sludge-tank is used to collect first stage precipitation tank 5, second-level settling pond 9 and the bottom of three-level sedimentation basin 12
The mud of output.
Preferably, referring to Fig. 1, the sludge-tank in the embodiment of the present invention includes the first sludge 15 and the second sludge-tank 19, its
In, the first sludge-tank 15 is connected with first stage precipitation tank 5, and the second sludge-tank 19 is connected with second-level settling pond 9 and three-level sedimentation basin 12.
Said structure is convenient to be handled solid waste.
Further, the system in the embodiment of the present invention also includes lime breast pond and is used to milk of lime be made and to pretreatment
Pond 2 is provided, and lime breast pond is connected with pretreatment pool 2.
Wherein, the first order reaction pond 3 in the embodiment of the present invention, two-stage coagulation pond 7 and third-order reaction pond 10 are equipped with stirring
And pH meter.Flowmeter is preferably provided with each transfer pipeline, strictly controls reaction ratio, to reach best treatment effect.
Above-mentioned each structure uses pipeline as needed（Liquid and material oar）Or transmission belt（Solid）Connect, according to need on pipeline
Kinetic pump, valve, flowmeter etc. are set.Each structure is common structure in said structure, for those skilled in the art institute
It is known.In said structure, " first " and " second " only distinguishes effect, without other special meanings.
The embodiments of the invention provide a kind of processing system of pyrite-based sulfuric acid production waste water, for entering to pyrite-based sulfuric acid production waste water
Row processing, removes F and heavy metal etc., can be directly or through discharge or recycling after simple process after processing.
Embodiment 2
Referring to Fig. 1, embodiment 2 provides a kind of processing method of pyrite-based sulfuric acid production waste water, and its method main process is：Will
Waste water squeeze into oxidation reaction pond 1 with oxidant（Liquor natrii hypochloritis）Reaction, after aoxidizing certain time, with oxidation solution delivery pump
Squeeze into pretreatment pool 2 and reacted with milk of lime, control ph；Waste water is sent into first order reaction pond 3 after pretreatment, in first order reaction
Liquid caustic soda and copper sulphate are added in pond 3, controls certain pH value and copper sulphate feeding quantity.When the mixed liquor overflow to one-level coagulation
When in pond 4, a certain amount of cationic flocculant is added.Treat that liquid flooding to first stage precipitation tank 5 is precipitated in one-level coagulating basin 4
Separation, the supernatant liquor overflow of first stage precipitation tank 5 is into second order reaction pond 6.A certain amount of copper sulphate is added in second order reaction pond 6,
Mixed reaction solution overflow adds a certain amount of liquid caustic soda, to the perseverance of control ph to two-stage coagulation pond 7 in two-stage coagulation pond 7
It is fixed.Reach the mixed liquor overflow of certain pH value to two level flocculation basin 8, and a certain amount of anion wadding is added into two level flocculation basin 8
Solidifying agent, mixed liquor overflow to second-level settling pond 9, the supernatant liquor of second-level settling pond 9 after flocculation flow to third-order reaction pond 10, to
The appropriate heightening pH value of liquid caustic soda is added in third-order reaction pond 10 and adds copperas solution, the mixed liquor overflow after heightening to three-level
Coagulating basin 11, a small amount of Flokal B is suitably added into three-level coagulating basin 11, and allow its overflow to three-level sedimentation basin 12, liquid
Body is staticly settled in three-level sedimentation basin 12, and supernatant liquor overflow to clear water reserviors is discharged or recycled.Wherein, the first sludge-tank
15 and second the sludge of sludge-tank 19 sent outside after press filtration.Wherein, need to control the concentration of each medicament in the present invention, and pass through control
The flow of feed pump processed controls chemical feeding quantity；Wherein, each grug feeding jar liquid level is between 1/3-2/3.
Specifically, comprise the following steps referring to Fig. 1, method provided by the invention：
A, in oxidation reaction pond 1, liquor natrii hypochloritis's progress oxidation reaction is added in waste water, controls the pH value of waste water
Less than 2, the concentration of liquor natrii hypochloritis is 10wt%, and the volume ratio of liquor natrii hypochloritis and waste water is 0.33:1, after the completion of reaction
Send step b.
B, milk of lime is added in the waste water that step a is obtained（Concentration is suitable to reach emulsus）The pH value for making waste water is
7 ± 0.2, the use of subsequent alkaline can be not only reduced, also the heavy metal in waste water is pre-processed.
C, copper-bath is added in the waste water that step b is obtained and sodium hydroxide solution carries out precipitation reaction, control is useless
The pH value of water is 7.2 ± 0.2（The usage amount of sodium hydroxide solution can be determined, and then determines the usage amount of follow-up medicament）.Its
In, the volume ratio of copper-bath and sodium hydroxide solution is 0.75:1, the concentration of sodium hydroxide solution is 33wt%, copper sulphate
The concentration of solution is 1.3wt%, and step d is sent after the completion of reaction.
D, cation flocculant is added in the waste water that step c is obtained（CPAM）Flocks processing is carried out, flocks are completed laggard
Row precipitation.Wherein, cation flocculant and the volume ratio of the step c copper-baths used are 0.6:1, cation flocculant
Concentration is 0.3wt%.Supernatant send step e.
E, add copper-bath in the clear liquid obtained after step d precipitations and carry out precipitation reaction.Wherein, make in step e
The volume ratio of copper-bath and the step c copper-baths used is 0.7:1, the concentration of copper-bath is
1.3wt%, step f is sent after the completion of reaction.
F, sodium hydroxide solution is added in the waste water that step e is obtained, controls the pH value 8 ± 0.2 of waste water.Wherein, hydrogen-oxygen
The concentration for changing sodium solution is 33wt%.
G, anion flocculant is added in the waste water that step f is obtained（APAM）Flocks processing is carried out, flocks are completed laggard
Row precipitation.Wherein, the volume ratio of the anion flocculant used in step g and the step d cation flocculants used is 0.8:
1, the concentration of anion flocculant is 0.3wt%.Supernatant send step h.
h：Sodium hydroxide solution is added in the clear liquid obtained after step g precipitations and copperas solution precipitate instead
Should, control ph 8.5.Wherein, the volume ratio of the copperas solution used in step h and the step c copper-baths used
For 1:1, the concentration of copperas solution is 1.2wt%, and the concentration of sodium hydroxide solution is 33wt%, and step i is sent after the completion of reaction.
i：A small amount of anion flocculant is added in the waste water that step h is obtained and carries out flocks processing, is carried out after the completion of flocks
Precipitation.Wherein, the usage amount of anion flocculant is finely adjusted according to actual conditions（Anion flocculant that step i is used with
The volume ratio for the cation flocculant that step d is used is about 0.25:1）, the concentration of anion flocculant is 0.3wt%.Supernatant
Send step j.
j：By the obtained clear liquid dischargings of step i or recycling（Other simple processing can preferably be passed through again, such as stand and expose
Gas or microbiological treatment etc.）, the waste water arsenic average content after handling after testing is 0.26mg/L, and separating by extraction is more than >=99%, fluorine
Removal efficiency is less than 0.3mg/L more than 90%, Pb contents, and Cd contents are less than 0.03mg/L, and Cr contents are less than 0.2mg/L, and Hg contents are small
In 0.02 mg/L.
Wherein, the addition of each flocculant in above process, it is therefore desirable to ensure supernatant clear.Wherein, above-mentioned mistake
The cation flocculant and anion flocculant added in journey are to be commonly used in the commercially available prod of wastewater treatment.Said process
The volume of each medicament is controlled by flow.
Preferably, precipitation merging treatment step g and i obtained, step d precipitation are individually handled, and step d, g and i are obtained
To precipitation in contain arsenic, but in the precipitation handled at twice other heavy metals distribution it is different, in order to preferably return
Receive.
The method that the present embodiment provides includes：Waste water is by oxidation processes, pretreatment, first order reaction, one-level flocks, one-level
The processing such as sedimentation, second order reaction, two level flocks, two level sedimentation, third-order reaction, three-level flocks and three-level sedimentation, it is useless after processing
Water outlet arsenic average content is 0.26mg/L, and separating by extraction is more than >=99%, and fluorine removal efficiency is more than 90%, Pb, Cd, Cr, Hg etc. content
It is all relatively low, meet national standard, somewhat handling not handling either can discharge or recycling.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (8)
1. a kind of processing method of pyrite-based sulfuric acid production waste water, it is characterised in that comprise the following steps：
A, liquor natrii hypochloritis is added in waste water and carries out oxidation reaction, control the pH value of waste water to be less than 2, the sodium hypochlorite is molten
The concentration of liquid is 5-15wt%, and the volume ratio of the liquor natrii hypochloritis and waste water is 0.25-0.5:1；
B, milk of lime is added in the waste water that step a is obtained makes the pH value of waste water be 6.5-7；
C, it is 7-7.5 copper-bath and sodium hydroxide solution, the pH value for controlling waste water to be added in the waste water that step b is obtained,
The volume ratio of the copper-bath and sodium hydroxide solution is 0.5-0.8:1, the concentration of the sodium hydroxide solution is 20-
40wt%, the concentration of the copper-bath is 1-1.5wt%；
D, cation flocculant is added in the waste water that step c is obtained and carries out flocks processing, is precipitated after the completion of flocks, it is described
Cation flocculant and the volume ratio of the step c copper-baths used are 0.5-1:1, the concentration of the cation flocculant is
0.25-0.35wt%；
E, copper-bath, the copper-bath used in step e and step c are added in the clear liquid obtained after step d precipitations
The volume ratio of the copper-bath used is 0.6-0.75:1, the concentration of the copper-bath is 1-1.5wt%；
F, sodium hydroxide solution is added in the waste water that step e is obtained, controls the pH value 7.5-8.2 of waste water；
G, anion flocculant is added in the waste water that step f is obtained and carries out flocks processing, is precipitated after the completion of flocks, it is described
The volume ratio of anion flocculant and the step d cation flocculants used is 0.7-0.85:1, the anion flocculant
Concentration is 0.25-0.35wt%；
i：Sodium hydroxide solution and copperas solution, control ph 8.2- are added in the clear liquid obtained after step g precipitations
The volume ratio of the copperas solution used in 8.7, step i and the step c copper-baths used is 0.8-1.2:1, it is described
The concentration of copperas solution is 0.8-1.3wt%；
j：Anion flocculant is added in the waste water that step i is obtained and carries out flocks processing, is precipitated after the completion of flocks, it is described
The volume ratio of anion flocculant and the step d cation flocculants used is 0.1-0.5:1, the anion flocculant it is dense
Spend for 0.25-0.35wt%；
k：By the obtained clear liquid dischargings of step j or recycling；
The precipitation merging treatment that step g and j are obtained.
2. the processing method of pyrite-based sulfuric acid production waste water according to claim 1, it is characterised in that in step a, described time
The concentration of sodium chlorate solution is 10wt%, and the volume ratio of the liquor natrii hypochloritis and waste water is 0.33:1.
3. the processing method of pyrite-based sulfuric acid production waste water according to claim 1, it is characterised in that in step c and e, institute
The concentration for stating copper-bath is 1.3wt%.
4. the processing method of pyrite-based sulfuric acid production waste water according to claim 1, it is characterised in that in step f, control pH
Value 8.
5. the processing method of pyrite-based sulfuric acid production waste water according to claim 1, it is characterised in that in step i, the sulphur
The concentration of sour ferrous iron solution is 1.2wt%, control ph 8.5.
6. the processing method of pyrite-based sulfuric acid production waste water according to claim 1, it is characterised in that in step d, the sun
The concentration of ion flocculant is 0.3wt%；In step g and j, the concentration of the anion flocculant is 0.3wt%.
7. the processing method of pyrite-based sulfuric acid production waste water according to claim 1, it is characterised in that in step c, f and i,
The concentration of the sodium hydroxide solution is 33wt%.
8. a kind of processing system of pyrite-based sulfuric acid production waste water, it is characterised in that including sludge-tank, copper sulphate adding set, sulfuric acid
Iron adding set, alkali adding set, cationic flocculant adding set, Flokal B adding set and the oxygen being sequentially connected
Change reaction tank, pretreatment pool, first order reaction pond, one-level coagulating basin, first stage precipitation tank, second order reaction pond, two-stage coagulation pond, two level
Flocculation basin, second-level settling pond, third-order reaction pond, three-level coagulating basin and three-level sedimentation basin, the copper sulphate adding set and one-level
Reaction tank is connected with second order reaction pond, and the ferric sulfate adding set is connected with third-order reaction pond, and the sludge-tank sinks with one-level
Shallow lake pond, second-level settling pond connect with three-level sedimentation basin, and the alkali adding set and first order reaction pond, two-stage coagulation pond and three-level are anti-
Answer pond to connect, the cationic flocculant adding set is connected with one-level coagulating basin, the Flokal B adding set with
Two level flocculation basin connects with three-level coagulating basin, and the sludge-tank includes the first sludge-tank and the second sludge-tank, first sludge
Pond is connected with first stage precipitation tank, and second sludge-tank is connected with second-level settling pond and three-level sedimentation basin.
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| CN107176711B (en) * | 2017-04-20 | 2020-10-16 | 东北大学 | Process for efficiently recovering copper in high-concentration berberine wastewater |
| CN108947006A (en) * | 2018-07-20 | 2018-12-07 | 江苏力祺环保科技有限公司 | A kind of sewage water treatment method |
| CN109399832A (en) * | 2018-11-27 | 2019-03-01 | 中国恩菲工程技术有限公司 | The processing method of acid heavy metal wastewater |
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| JPH09192677A (en) * | 1996-01-16 | 1997-07-29 | Mitsubishi Heavy Ind Ltd | Treatment of arsenic-containing waste water |
| CN102234161B (en) * | 2010-05-05 | 2013-02-27 | 深圳市明灯科技有限公司 | Method for treating high-concentration arsenic-containing wastewater |
| CN103121763A (en) * | 2012-11-30 | 2013-05-29 | 中南民族大学 | Process for treating high-arsenic and high cadmium waste acid by using three-stage lime-ferric salt method |
| CN104058515B (en) * | 2014-05-08 | 2015-10-28 | 昆明有色冶金设计研究院股份公司 | A kind of method of acid waste water system treatment of acidic wastewater |
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