CN103011440A - Method for treatment on titanium sponge production waste water - Google Patents
Method for treatment on titanium sponge production waste water Download PDFInfo
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- CN103011440A CN103011440A CN2011102844824A CN201110284482A CN103011440A CN 103011440 A CN103011440 A CN 103011440A CN 2011102844824 A CN2011102844824 A CN 2011102844824A CN 201110284482 A CN201110284482 A CN 201110284482A CN 103011440 A CN103011440 A CN 103011440A
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- waste water
- titanium sponge
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- factory effluent
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Abstract
The invention relates to a method for treatment on titanium sponge production waste water. The method comprises the following steps of (1) carrying out neutralization dechromisation of gas cleaning waste water in a neutralization sedimentation dechromisation tank and controlling a yield of chromium-containing precipitated sludge by control of a pH value, (2) putting the waste water subjected to dechromisation and obtained by the step (1) into a neutralization aeration tank for continued neutralization until a pH value reaches the preset pH value, and carrying out aeration so that ferrous iron is oxidized into ferric iron, (3) mixing waste water from other workshops and the waste water subjected to neutralization aeration of the step (2) in a mixing tank, (4) putting the waste water mixed by the step (3) into a flocculation tank, and carrying out neutralization settlement so that manganese is removed, and (5) carrying out follow-up deep treatment on the product water obtained by the step (4). The method reduces a construction cost, an operation cost and a use amount of a flocculant. After neutralization and aeration of the product water subjected to dechromisation, the sedimentation performances of the follow-up precipitates are obviously improved, and a sludge volume is reduced. The method controls a yield of dangerous solid waste to the maximum degree and improves a waste recycling rate.
Description
Technical field
The present invention relates to a kind for the treatment of process of heavy metal contamination acid waste water, relate in particular to a kind for the treatment of process of titanium sponge factory effluent.
Background technology
The titanium sponge production technique can produce a kind of strongly acid wastewater, contains a large amount of heavy metal chlorides.This waste water comprises two parts, and a kind of is that chlorine gas cleaning workshop section produces, and principal pollutant are Cr (III), Fe (II, III) and Mn (II); Other workshop waste water contains a small amount of metal ion.At present, the titanium sponge factory effluent is generally only done to discharge or process with other trade effluent after plain sedimentation separates.Sedimentation process to produce a large amount of chromium sediments that contain, and is to need the special processing Hazardous wastes.Select suitable technique can improve the processing water water quality of this kind waste water and the sludge quantity that minimizing contains Hazardous wastes, thereby can reduce the bulk treatment expense.
Summary of the invention
In order to solve the problems of the technologies described above the treatment process that the invention provides a kind of titanium sponge factory effluent; purpose is in order to reduce the cost of purification of waste water in the titanium sponge production process; protection of the environment; waste water after the processing directly reaches discharging standards or industrial circulating water reuse standard, the solid castoff specification disposal of resources that wastewater treatment produces.
For reaching a kind of titanium sponge production wastewater treatment of above-mentioned purpose the present invention method, may further comprise the steps:
(1), gas cleaning waste water in neutralization precipitation dechromisation pond, carry out in and dechromisation, contain chromium precipitating sludge output by controlling the control of its pH value;
(2), step (1) except chrome waste water enter in and the aeration tank, continue to be neutralized to set the pH value after, aeration becomes ferric iron with oxidation of divalent;
(3), waste water mixes in mixing pit in other workshop waste water and the step (2) and behind the aeration;
(4), waste water entered in the flocculation basin Neutralization settlement with demanganization after step (3) was mixed;
(5), follow-up advanced treatment is carried out in step (4) water outlet.
Described step (1) adopts unslaked lime as the dechromisation precipitation agent, and the unslaked lime dosage is 8-9g/L, preferred 8.5g/L.
The pH of described step (1) is controlled to be 4-6, and preferred 5.2.
Described unslaked lime adopts dry type to add.
Describedly by calcium hydroxide machine unslaked lime is changed into white lime first, directly add again dry hydrate.
The chromium sediment that contains that described step (1) produces is unified to process.
Described unified treatment process is carried out filter press for containing the chromium sediment, and mud cake removes dangerous waste disposal center.
The setting pH value of described step (2) is 6.
Described step (2) aeration time is 10-30min, and aeration intensity is 10m
3Air/m
3Waste water.
Described step (2) adopts 4% milk of lime as neutralizing agent, and dosage is 25ml/L waste water.
Described step (4) adopts 4% milk of lime as the demanganization precipitation agent, and dosage is 18.75ml/L waste water.
The sediment that described step (4) produces carries out recycling treatment.
Described recycling processing method is that sediment carries out filter press, and mud cake goes brickmaking.
The follow-up advanced treatment of described step (5) is ultrafiltration-reverse osmosis method.
Described ultrafiltration-reverse osmosis method arrives reuse pool at last for passing through first the ultrafiltration pond more successively by ultrafiltration system and reverse osmosis system, and the reverse osmosis concentrated liquid that obtains in reverse osmosis system is produced Calcium Chloride Powder Anhydrous.
The precipitation process of described step (1) and step (4) does not add flocculation agent.
Beneficial effect of the present invention is as follows:
1, employing neutralization precipitation method is removed the Cr in the gas cleaning waste water
3+, effectively control the output that contains the poisonous sediment of Cr (III) by control pH value.Select unslaked lime as the neutralization precipitation agent, and adopt the mode of doing throwing to add white lime, reduced construction cost and working cost.
2, take full advantage of Al a large amount of in the waste water
3+And Fe
3+, saved adding of flocculation agent.
3, behind the dechromisation water outlet through in and behind the Air Exposure, the sedimentation function of follow-up sediment be improved significantly, and reduced sludge volume.
4, with processing except chrome waste water and other workshop waste water merge behind the Air Exposure, take full advantage of Al a large amount of in the waste water
3+And Fe
3+, saved adding of flocculation agent.
5, the sediment classification of step-by-step processing generation is disposed, and will control to greatest extent dangerous solid waste output, has improved the waste resource rate.
Description of drawings:
Fig. 1 is process flow sheet.
Embodiment:
The invention will be further described below in conjunction with accompanying drawing.
The strongly acid wastewater that the titanium sponge production technique produces contains a large amount of heavy metal chlorides.This waste water comprises two parts, and a kind of is that chlorine gas cleaning workshop section produces, and principal pollutant are Cr (III), Fe (II, III) and Mn (II); Other workshop waste water contains a small amount of metal ion.Concrete data are as follows:
| Sequence number | Essential substance | The gas cleaning workshop | Other workshop |
| 1 | pH | 2 | 2 |
| 2 | Cr 3+ | 4.0 mg/L | — |
| 3 | Mn 2+ | 99 mg/L | 10 mg/L |
| 4 | Al 3+ | 1416 mg/L | — |
| 5 | Fe 3+ | 1492 mg/L | — |
| 6 | Fe 2+ | 2237 mg/L | — |
| 7 | Mg 2+ | 339 mg/L | 1425 mg/L |
| 8 | Na + | 1706 mg/L | 30 mg/L |
| 9 | K + | 424 mg/L | 11 mg/L |
The treatment process of titanium sponge factory effluent of the present invention as shown in the figure, step is as follows: during (1), gas cleaning waste water carry out in neutralization precipitation dechromisation pond and dechromisation, contain chromium precipitating sludge output by controlling its pH value control; Adopt unslaked lime as the dechromisation precipitation agent, the unslaked lime dosage is 8-9g/L, and preferred 8.5g/L, unslaked lime adopt dry type to add, and by calcium hydroxide machine unslaked lime are changed into white lime first, directly add dry hydrate again; PH is controlled to be 4-6, and preferred 5.2; The chromium sediment that contains that produces is unified to process, and unified treatment process is carried out filter press for containing the chromium sediment, and mud cake removes dangerous waste disposal center, and drainage returns neutralization precipitation dechromisation pond; (2), step (1) except chrome waste water enter in and the aeration tank, continue to be neutralized to set pH value after, aeration becomes ferric iron with oxidation of divalent, setting pH value is 6, aeration time is 10-30min, aeration intensity is 10m
3Air/m
3Waste water adopts 4% milk of lime as neutralizing agent, and dosage is 25ml/L waste water; (3), waste water mixes in mixing pit in other workshop waste water and the step (2) and behind the aeration; (4), waste water entered in the flocculation basin Neutralization settlement with demanganization after step (3) was mixed, adopt 4% milk of lime as the demanganization precipitation agent, dosage is 18.75ml/L waste water, the sediment that produces carries out recycling treatment, recycling processing method is that sediment carries out filter press, mud cake goes brickmaking, and drainage turns back to balancing reservoir; (5), follow-up advanced treatment is carried out in step (4) water outlet, follow-up advanced treatment is ultrafiltration-reverse osmosis method, ultrafiltration-reverse osmosis method is for passing through first the ultrafiltration pond more successively by ultrafiltration system and reverse osmosis system, arrive at last reuse pool, the reverse osmosis concentrated liquid that obtains in reverse osmosis system is produced Calcium Chloride Powder Anhydrous.
The precipitation process of step (1) and step (4) does not add flocculation agent.
Neutralization precipitation dechromisation workshop section: according to the solubility product size of each metal ion oxyhydroxide, the precipitation of metal ion sequentially is Fe in this waste water
3+, Al
3+, Cr
3+, Fe
2+, Mg
2+, Mn
2+Make Mn if regulate the pH value
2+Precipitation is complete, the Fe that precipitates under higher pH value that contains in the waste water
2+, Mg
2+To precipitate in a large number Deng also, thereby increase sludge quantity, containing the chromium sediment is dangerous refuse.Employing neutralization precipitation method is removed the Cr in the gas cleaning waste water
3+, at 4-6, Cr in the water outlet (III) will reach emission concentration by control pH value, and the output of the poisonous sediment of Cr (III) this moment is minimum.Select unslaked lime as the neutralization precipitation agent.The milk of lime consumption of this segment process accounts for 73% of whole consumption, and the mode of adopt to do throwing adds white lime, saved bulky lime dissolving tank and relevantly stir, the adding equipment expense, reduced simultaneously processing costs.The unslaked lime dosage is 8-9g/L, preferred 8.5g/L.By calcium hydroxide machine unslaked lime is changed into white lime, directly add again ripe stone flour.
In and aeration workshop section: except still containing a large amount of Fe in the chrome waste water
2+, because Fe
2+The pH value that the formation precipitation needs is more than Fe
3+Height, and settling property is relatively poor, and the concentrated and dehydration of ferrous sediment is than ferric iron sediment difficulty, the Fe that water outlet is residual
2+May be converted into Fe
3+, affect effluent color dilution.Therefore, should in the line space gas aeration pre-treatment of advancing of dechromisation wastewater treatment process, make Fe
2+Be converted into Fe fully
3+After, carry out again precipitation process.Except chrome waste water enters the aeration tank, continuing to be neutralized to setting pH value is 6, adopts the mode aeration of blast aeration, and oxidation of divalent is become ferric iron.Aeration time is 10-30min, and aeration intensity is 10m
3Air/m
3Waste water.Adopt 4% milk of lime as neutralizing agent, dosage is 25ml/L waste water.
Mixed precipitation workshop section: the principal pollutant that other workshop produces waste water are Mn
2+, with in and the aeration workshop section water outlet waste water principal pollutant after merging be Mn
2+, can adopt neutralization precipitation-Coagulation Method to remove.This section waste water contains a large amount of Al
3+, Fe
3+, in N-process, can form multinuclear oxyaluminum, iron polymkeric substance with coagulation, sweep volume by the net of co-precipitation and coagulating agent and catch effect, effluent quality is improved, thereby simplify technique, saving medicine.Adopt 4% milk of lime as the demanganization precipitation agent.
Advanced treatment workshop section: after primary treatment, go out water constituent and be mainly calcium chloride, concentration is about 1%, and namely lysotype total solid concentration (TDS) is in the 10000mg/L scope, and the concentration of calcium ion and chlorion is the industrial reuse water quality standard head and shoulders above.Choosing ultrafiltration-reverse osmosis method is desalination process, can effectively remove solvability salt residual in the waste water, makes output water total dissolved solid and hardness number satisfy the reuse requirement.High yield water yield seawater desalination reverse osmosis rolled film element is adopted in reverse osmosis.
Innoxious and the resource utilization of refuse: contain chromium sediment method of disposal for carrying out filter press, mud cake removes dangerous waste disposal center.Neutralization precipitation sediment recycling processing method is that sediment carries out filter press, and mud cake goes brickmaking.Reverse osmosis concentrated liquid is produced Calcium Chloride Powder Anhydrous.
Claims (16)
1. the treatment process of titanium sponge factory effluent is characterized in that comprising the steps:
(1), gas cleaning waste water in neutralization precipitation dechromisation pond, carry out in and dechromisation, contain chromium precipitating sludge output by controlling the control of its pH value;
(2), step (1) except chrome waste water enter in and the aeration tank, continue to be neutralized to set the pH value after, aeration becomes ferric iron with oxidation of divalent;
(3), waste water mixes in mixing pit in other workshop waste water and the step (2) and behind the aeration;
(4), waste water entered in the flocculation basin Neutralization settlement with demanganization after step (3) was mixed;
(5), follow-up advanced treatment is carried out in step (4) water outlet.
2. the treatment process of titanium sponge factory effluent according to claim 1 is characterized in that: step (1) adopts unslaked lime as the dechromisation precipitation agent, and the unslaked lime dosage is 8-9g/L, preferably 8.5g/L.
3. the treatment process of titanium sponge factory effluent according to claim 1, it is characterized in that: the pH of step (1) is controlled to be 4-6, and preferred 5.2.
4. the treatment process of titanium sponge factory effluent according to claim 2 is characterized in that: unslaked lime adopts dry type to add.
5. the treatment process of titanium sponge factory effluent according to claim 4 is characterized in that: by calcium hydroxide machine unslaked lime is changed into white lime first, directly add dry hydrate again.
6. the treatment process of titanium sponge factory effluent according to claim 1 is characterized in that: the chromium sediment that contains that step (1) produces is unified to process.
7. the treatment process of titanium sponge factory effluent according to claim 6 is characterized in that: unified treatment process is carried out filter press for containing the chromium sediment, and mud cake removes dangerous waste disposal center.
8. the treatment process of titanium sponge factory effluent according to claim 1, it is characterized in that: the setting pH value of step (2) is 6.
9. the treatment process of titanium sponge factory effluent according to claim 1, it is characterized in that: step (2) aeration time is 10-30min, and aeration intensity is 10m
3Air/m
3Waste water.
10. the treatment process of titanium sponge factory effluent according to claim 1 is characterized in that: step (2) adopts 4% milk of lime as neutralizing agent, and dosage is 25ml/L waste water.
11. the treatment process of titanium sponge factory effluent according to claim 1 is characterized in that: step (4) adopts 4% milk of lime as the demanganization precipitation agent, and dosage is 18.75ml/L waste water.
12. the treatment process of titanium sponge factory effluent according to claim 1 is characterized in that: the sediment that step (4) produces carries out recycling treatment.
13. the treatment process of titanium sponge factory effluent according to claim 12 is characterized in that: recycling processing method is that sediment carries out filter press, and mud cake goes brickmaking.
14. the treatment process of titanium sponge factory effluent according to claim 1 is characterized in that: the follow-up advanced treatment of step (5) is ultrafiltration-reverse osmosis method.
15. the treatment process of titanium sponge factory effluent according to claim 14, it is characterized in that: ultrafiltration-reverse osmosis method is for passing through first the ultrafiltration pond more successively by ultrafiltration system and reverse osmosis system, arrive at last reuse pool, the reverse osmosis concentrated liquid that obtains in reverse osmosis system is produced Calcium Chloride Powder Anhydrous.
16. the treatment process of titanium sponge factory effluent according to claim 1 is characterized in that: the precipitation process of step (1) and step (4) does not add flocculation agent.
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Cited By (6)
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| CN103482794A (en) * | 2013-09-29 | 2014-01-01 | 攀钢集团钛业有限责任公司 | Method for comprehensively treating titanium sponge production wastewater |
| CN104164495A (en) * | 2014-07-22 | 2014-11-26 | 南京医科大学 | SNP marker related with myelosuppression toxicity of platinum chemotherapeutics and applications thereof |
| RU2538900C1 (en) * | 2013-05-29 | 2015-01-10 | Открытое Акционерное Общество "Корпорация Всмпо-Ависма" | Treatment of effluents of titanium-magnesium production |
| CN104164495B (en) * | 2014-07-22 | 2016-11-30 | 南京医科大学 | A kind of SNP mark relevant to platinum-based chemotherapy medicine bone marrow depression toxicity and application thereof |
| CN111087124A (en) * | 2019-12-13 | 2020-05-01 | 华航环境发展有限公司 | Sewage treatment method and system capable of automatically regulating and controlling pH value |
| CN113149309A (en) * | 2021-03-23 | 2021-07-23 | 云南国钛金属股份有限公司 | Titanium sponge industrial wastewater treatment system and technology |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2538900C1 (en) * | 2013-05-29 | 2015-01-10 | Открытое Акционерное Общество "Корпорация Всмпо-Ависма" | Treatment of effluents of titanium-magnesium production |
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| CN104164495A (en) * | 2014-07-22 | 2014-11-26 | 南京医科大学 | SNP marker related with myelosuppression toxicity of platinum chemotherapeutics and applications thereof |
| CN104164495B (en) * | 2014-07-22 | 2016-11-30 | 南京医科大学 | A kind of SNP mark relevant to platinum-based chemotherapy medicine bone marrow depression toxicity and application thereof |
| CN111087124A (en) * | 2019-12-13 | 2020-05-01 | 华航环境发展有限公司 | Sewage treatment method and system capable of automatically regulating and controlling pH value |
| CN113149309A (en) * | 2021-03-23 | 2021-07-23 | 云南国钛金属股份有限公司 | Titanium sponge industrial wastewater treatment system and technology |
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| CN103011440B (en) | 2014-07-30 |
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