CN107628721A - A kind of method of lime treatment lead waste water - Google Patents
A kind of method of lime treatment lead waste water Download PDFInfo
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- CN107628721A CN107628721A CN201711086798.6A CN201711086798A CN107628721A CN 107628721 A CN107628721 A CN 107628721A CN 201711086798 A CN201711086798 A CN 201711086798A CN 107628721 A CN107628721 A CN 107628721A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 235000008733 Citrus aurantifolia Nutrition 0.000 title claims abstract description 6
- 235000011941 Tilia x europaea Nutrition 0.000 title claims abstract description 6
- 239000004571 lime Substances 0.000 title claims abstract description 6
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 58
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000000292 calcium oxide Substances 0.000 claims abstract description 29
- 235000012255 calcium oxide Nutrition 0.000 claims abstract description 29
- 238000003756 stirring Methods 0.000 claims abstract description 28
- 230000001376 precipitating effect Effects 0.000 claims abstract description 24
- 239000010802 sludge Substances 0.000 claims abstract description 24
- 239000013078 crystal Substances 0.000 claims abstract description 16
- 238000004062 sedimentation Methods 0.000 claims abstract description 15
- 235000019738 Limestone Nutrition 0.000 claims abstract description 11
- 239000006028 limestone Substances 0.000 claims abstract description 11
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 8
- 238000002425 crystallisation Methods 0.000 claims abstract description 8
- 230000008025 crystallization Effects 0.000 claims abstract description 8
- 239000000428 dust Substances 0.000 claims abstract description 8
- 238000001914 filtration Methods 0.000 claims description 12
- 238000011001 backwashing Methods 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- JJJOZVFVARQUJV-UHFFFAOYSA-N 2-ethylhexylphosphonic acid Chemical group CCCCC(CC)CP(O)(O)=O JJJOZVFVARQUJV-UHFFFAOYSA-N 0.000 claims 1
- 150000002148 esters Chemical class 0.000 claims 1
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- Extraction Or Liquid Replacement (AREA)
Abstract
The present invention relates to a kind of method of lime treatment lead waste water, comprise the following steps：Natural lime stone is crushed, calcined, obtains quick lime；Lead waste water is put into stirring pool；Quick lime is added into the stirring pool, and is stirred with electric blender；Obtained waste water is passed through in sedimentation basin and precipitated, is then filtered, obtains precipitating sludge；The precipitating sludge is put into hothouse to be dried；Dried precipitating sludge is dissolved in watery hydrochloric acid, obtains primary solution；The primary solution is extracted, obtains extract；The extract is stripped, obtains strip liquor；The strip liquor is evaporated crystallization, obtains crystal；The crystal is mixed with carbon dust, places into electric furnace and is calcined, and caused gas is drained, finally gives metallic lead.Present invention process is simple, and reaction condition easily reaches, and reaction is also easy to control, and processing wastewater flow rate is big.
Description
Technical field
The present invention relates to the field of Environment Protection of wastewater treatment, specially a kind of method of lime treatment lead waste water.
Background technology
As industry and other industry develop rapidly, a large amount of uses of lead, lead contamination is from occupational environment Xiang Shui, big
Gas, food, medicine and our everyday environments extend.Lead is that distribution is wide, has accumulative environmental contaminants.The property of lead
Stable, highly unwanted to human body heavy metal element, while also seriously endanger the health of children.
Lead and its compound can enter human body through alimentary canal, respiratory tract, and alkyl lead can also be absorbed by skin.Lead is in vivo
Long half time produces harm to many individual tracts and physiological action.Nervous system be lead poisoning effect target tissue, lead
With Behavioral teratogenicity.Lead in invasion body damages cerebellum and brain cortex cell, interference metabolism with blood flow such as brain tissue
Activity, cause anaemia and encephaledema.Anaemia is one of early symptom of lead poisoning, and lead can suppress many in ferroheme building-up process
The activity of enzyme；Lead poisoning, which can cause vasopasm, eilema, retinal arterioles spasm and hypertension, to be all arteriolar spasm
Cause, when often result in tiny artery sclerosis.It is small that the renal damage of lead often shows as the lesion kidney such as interstitial nephritis or atrophic ephritis
Pipe reabsorption function reduction is the symptom of early stage, and Effects of Lead Exposure can also affect on reproductive function, contacts woman worker's infertility, the miscarriage of lead
And stillborn foetus incidence increases, lead can be by placental metastasis to fetus with.Oral lead poisoning person's liver be main damaged organ it
One, hepatomegaly can be caused, yellow subcutaneous ulcer, or even cirrhosis or hepatonecrosis is presented.Hepatic lesion be also likely to be in liver arteriolar spasm cause
Caused by ischaemic.Lead causes arteriolar spasm to be due to porphyrin metabolism obstacle, suppress the enzyme of base containing coloured glaze, disturbs vegetative nerve.Lead
Main aspect to children's harm is the influence to children's brain growth.Research both domestic and external is all it has been found that dirty in lead
The more serious place of dye, the incidence of disease of children mental retardation are higher；The Pb-B of children often rises 100 μ g/L, its IQ
(IQ) 6~8 points are declined.Research it has also been found that, children blood lead it is too high also and children's hyperkinetic syndrome, absent minded, difficulty of learning,
Criminal offence after aggression and adult has substantial connection.The Physique growth of children is also influenceed by lead.According to the country
Outer research report, the children of high blood lead, its possibility increase of short and small stature.The stature of high blood lead children is often below normal
Children.In addition, serious children's lead poisoning also results in anaemia etc..
Lead in waste water is essentially from the exploitation of lead ore, smelting and industrial discharge, the tail gas of motor vehicle emission
The main source of Air Lead Pollution, it can also cause water pollution.When lead concentration is very high in water, the self-cleaning that can suppress water body is made
With.Lead contamination has caused the great attention of people to the significant damage that human body and environment are brought.Therefore, waste water deleading has been
Faced as every field urgent to topic.
The content of the invention
The shortcomings that for above-mentioned prior art, the present invention provide a kind of lead containing wastewater treatment method green, cost is low.
The present invention solves above-mentioned technical problem and uses following technical scheme：A kind of method of lime treatment lead waste water, bag
Include following steps：
(1) natural lime stone is crushed, calcined, obtain quick lime；
(2) lead waste water is put into stirring pool；
(3) quick lime is added into the stirring pool, and is stirred with electric blender；
(4) waste water that step (3) obtains is passed through in sedimentation basin and precipitated, then filtered, obtain precipitating sludge；
(5) precipitating sludge is put into hothouse to be dried；
(6) dried precipitating sludge is dissolved in watery hydrochloric acid, obtains primary solution；
(7) primary solution is extracted, obtains extract；
(8) extract is stripped, obtains strip liquor；
(9) strip liquor is evaporated crystallization, obtains crystal；
(10) crystal is mixed with carbon dust, places into electric furnace and be calcined, and caused gas is arranged
Walk, finally give metallic lead.
Preferably, the lead content of waste water described in step (2) is 700~800mg/L.
Preferably, it is slowly added to quick lime in step (3).
Preferably, the purity of the quick lime is more than 80%.
Preferably, the sedimentation time is 8~12 hours in step (4).
As further preferred, step is filtered into press filtration described in (4).
Preferably, hothouse is arranged on stirring pool surrounding described in step (5).
Further, drying time is 12~24 hours in step (5).
Preferably, extractant is di-2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester in step (7).
Preferably, back washing agent is watery hydrochloric acid in step (8).
The present invention has the following advantages that compared with prior art：Present invention process is simple, and reaction condition easily reaches, reaction
Also easy to control, processing wastewater flow rate is big；The present invention handles pollutant using the self-produced quick lime of lime stone, its effect is good, source is wide,
Cost is low, and new pollutant will not be brought when handling waste water, and it is heavy to dry that quick lime produces substantial amounts of heat while reaction
Shallow lake mud, greatly reduce whole processing cost；The present invention further improves the content of lead using extracting, then with pyrometallurgy,
Lead is restored, the purity of final metallic lead is higher；Present invention process flow is green, and energy consumption is small, it is easy to accomplish industry
Change large-scale production.
Embodiment
In order that the technical means, the inventive features, the objects and the advantages of the present invention are easy to understand, tie below
Specific embodiment is closed, the present invention is expanded on further.It should be appreciated that specific embodiment described herein is only explaining this hair
It is bright, it is not intended to limit the present invention.
Embodiment 1：
Natural lime stone is crushed, calcined, obtains quick lime.The lead waste water that lead content is 700mg/L is put
Enter in stirring pool, quick lime is slowly added into the stirring pool, the purity of the quick lime is more than 80%, and uses electric mixing
The machine of mixing is stirred.The waste water obtained after stirring is passed through in sedimentation basin and precipitated, the sedimentation time is 8 hours, is then carried out
Filtering, it is described to be filtered into press filtration, obtain precipitating sludge；The precipitating sludge is put into hothouse to be dried, the hothouse
Stirring pool surrounding is arranged on, drying time is 12 hours.Dried precipitating sludge is dissolved in watery hydrochloric acid, obtained primary molten
Liquid；The primary solution is extracted, extractant is di-2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester, obtains extract；
The extract is stripped, back washing agent is watery hydrochloric acid, obtains strip liquor；The strip liquor is evaporated crystallization, obtained
Crystal；The crystal is mixed with carbon dust, places into electric furnace and is calcined, and caused gas is drained, most
Metallic lead is obtained eventually.
Embodiment 2：
Natural lime stone is crushed, calcined, obtains quick lime.The lead waste water that lead content is 750mg/L is put
Enter in stirring pool, quick lime is slowly added into the stirring pool, the purity of the quick lime is more than 80%, and uses electric mixing
The machine of mixing is stirred.The waste water obtained after stirring is passed through in sedimentation basin and precipitated, the sedimentation time is 10 hours, is then carried out
Filtering, it is described to be filtered into press filtration, obtain precipitating sludge；The precipitating sludge is put into hothouse to be dried, the hothouse
Stirring pool surrounding is arranged on, drying time is 18 hours.Dried precipitating sludge is dissolved in watery hydrochloric acid, obtained primary molten
Liquid；The primary solution is extracted, extractant is di-2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester, obtains extract；
The extract is stripped, back washing agent is watery hydrochloric acid, obtains strip liquor；The strip liquor is evaporated crystallization, obtained
Crystal；The crystal is mixed with carbon dust, places into electric furnace and is calcined, and caused gas is drained, most
Metallic lead is obtained eventually.
Embodiment 3：
Natural lime stone is crushed, calcined, obtains quick lime.The lead waste water that lead content is 800mg/L is put
Enter in stirring pool, quick lime is slowly added into the stirring pool, the purity of the quick lime is more than 80%, and uses electric mixing
The machine of mixing is stirred.The waste water obtained after stirring is passed through in sedimentation basin and precipitated, the sedimentation time is 12 hours, is then carried out
Filtering, it is described to be filtered into press filtration, obtain precipitating sludge；The precipitating sludge is put into hothouse to be dried, the hothouse
Stirring pool surrounding is arranged on, drying time is 24 hours.Dried precipitating sludge is dissolved in watery hydrochloric acid, obtained primary molten
Liquid；The primary solution is extracted, extractant is di-2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester, obtains extract；
The extract is stripped, back washing agent is watery hydrochloric acid, obtains strip liquor；The strip liquor is evaporated crystallization, obtained
Crystal；The crystal is mixed with carbon dust, places into electric furnace and is calcined, and caused gas is drained, most
Metallic lead is obtained eventually.
Embodiment 4：
Natural lime stone is crushed, calcined, obtains quick lime.The lead waste water that lead content is 770mg/L is put
Enter in stirring pool, quick lime is slowly added into the stirring pool, the purity of the quick lime is more than 80%, and uses electric mixing
The machine of mixing is stirred.The waste water obtained after stirring is passed through in sedimentation basin and precipitated, the sedimentation time is 10 hours, is then carried out
Filtering, it is described to be filtered into press filtration, obtain precipitating sludge；The precipitating sludge is put into hothouse to be dried, the hothouse
Stirring pool surrounding is arranged on, drying time is 21 hours.Dried precipitating sludge is dissolved in watery hydrochloric acid, obtained primary molten
Liquid；The primary solution is extracted, extractant is di-2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester, obtains extract；
The extract is stripped, back washing agent is watery hydrochloric acid, obtains strip liquor；The strip liquor is evaporated crystallization, obtained
Crystal；The crystal is mixed with carbon dust, places into electric furnace and is calcined, and caused gas is drained, most
Metallic lead is obtained eventually.
Embodiment 5：
Natural lime stone is crushed, calcined, obtains quick lime.The lead waste water that lead content is 740mg/L is put
Enter in stirring pool, quick lime is slowly added into the stirring pool, the purity of the quick lime is more than 80%, and uses electric mixing
The machine of mixing is stirred.The waste water obtained after stirring is passed through in sedimentation basin and precipitated, the sedimentation time is 11 hours, is then carried out
Filtering, it is described to be filtered into press filtration, obtain precipitating sludge；The precipitating sludge is put into hothouse to be dried, the hothouse
Stirring pool surrounding is arranged on, drying time is 19 hours.Dried precipitating sludge is dissolved in watery hydrochloric acid, obtained primary molten
Liquid；The primary solution is extracted, extractant is di-2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester, obtains extract；
The extract is stripped, back washing agent is watery hydrochloric acid, obtains strip liquor；The strip liquor is evaporated crystallization, obtained
Crystal；The crystal is mixed with carbon dust, places into electric furnace and is calcined, and caused gas is drained, most
Metallic lead is obtained eventually.
In the present invention, using natural lime stone, raw material is wide, and cost is low, then for self-produced lime stone, cost
It is easily controllable, as long as the purity of quick lime is more than 80%.The heat production of quick lime reaction is recycled, heat energy utilization, reduces energy
Consumption.Present invention process is simple, and reaction condition easily reaches, and reaction is also easy to control, and processing wastewater flow rate is big, and present invention process flow is green
Colour circle is protected, and energy consumption is small, it is easy to accomplish industrial-scale production.
The general principle and principal character and advantages of the present invention of the present invention, the technology of the industry has been shown and described above
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention, the claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (10)
1. a kind of method of lime treatment lead waste water, comprises the following steps：
(1) natural lime stone is crushed, calcined, obtain quick lime；
(2) lead waste water is put into stirring pool；
(3) quick lime is added into the stirring pool, and is stirred with electric blender；
(4) waste water that step (3) obtains is passed through in sedimentation basin and precipitated, then filtered, obtain precipitating sludge；
(5) precipitating sludge is put into hothouse to be dried；
(6) dried precipitating sludge is dissolved in watery hydrochloric acid, obtains primary solution；
(7) primary solution is extracted, obtains extract；
(8) extract is stripped, obtains strip liquor；
(9) strip liquor is evaporated crystallization, obtains crystal；
(10) crystal is mixed with carbon dust, places into electric furnace and be calcined, and caused gas is drained, most
Metallic lead is obtained eventually.
2. according to the method for claim 1, the lead content of waste water described in step (2) is 700~800mg/L.
3. according to the method for claim 1, step is slowly added to quick lime in (3).
4. according to the method for claim 3, the purity of the quick lime is more than 80%.
5. according to the method for claim 1, the sedimentation time is 8~12 hours in step (4).
6. method according to claim 1 or 5, step is filtered into press filtration described in (4).
7. according to the method for claim 1, hothouse is arranged on stirring pool surrounding described in step (5).
8. the method according to claim 1 or 7, drying time is 12~24 hours in step (5).
9. according to the method for claim 1, extractant is 2- ethylhexyl phosphonic acid mono 2- ethylhexyls in step (7)
Ester.
10. according to the method for claim 1, back washing agent is watery hydrochloric acid in step (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711086798.6A CN107628721A (en) | 2017-11-07 | 2017-11-07 | A kind of method of lime treatment lead waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711086798.6A CN107628721A (en) | 2017-11-07 | 2017-11-07 | A kind of method of lime treatment lead waste water |
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| Publication Number | Publication Date |
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| CN107628721A true CN107628721A (en) | 2018-01-26 |
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| CN201711086798.6A Withdrawn CN107628721A (en) | 2017-11-07 | 2017-11-07 | A kind of method of lime treatment lead waste water |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010051869A (en) * | 2008-08-27 | 2010-03-11 | Taiheiyo Cement Corp | Method and system for washing incineration ash and dust extracted from cement kiln combustion gas with water |
| EP2606016A2 (en) * | 2010-08-18 | 2013-06-26 | Jane A. Hoxsey | Mineral-releasing compost and method of using the same for soil remediation |
| CN104692579A (en) * | 2015-02-16 | 2015-06-10 | 桂林奥尼斯特节能环保科技有限责任公司 | Advanced recycling method for wastewater generated in making acid by using smelting flue gas |
| CN105174405A (en) * | 2015-10-26 | 2015-12-23 | 刘阳生 | Method for preparing polymeric aluminum iron flocculating agent from wire rope acid sludge |
-
2017
- 2017-11-07 CN CN201711086798.6A patent/CN107628721A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010051869A (en) * | 2008-08-27 | 2010-03-11 | Taiheiyo Cement Corp | Method and system for washing incineration ash and dust extracted from cement kiln combustion gas with water |
| EP2606016A2 (en) * | 2010-08-18 | 2013-06-26 | Jane A. Hoxsey | Mineral-releasing compost and method of using the same for soil remediation |
| CN104692579A (en) * | 2015-02-16 | 2015-06-10 | 桂林奥尼斯特节能环保科技有限责任公司 | Advanced recycling method for wastewater generated in making acid by using smelting flue gas |
| CN105174405A (en) * | 2015-10-26 | 2015-12-23 | 刘阳生 | Method for preparing polymeric aluminum iron flocculating agent from wire rope acid sludge |
Non-Patent Citations (1)
| Title |
|---|
| 马世昌: "《化学物质辞典》", 30 April 1999 * |
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