CN101648741A - Recycling method of heavy metal in composite waste - Google Patents
Recycling method of heavy metal in composite waste Download PDFInfo
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- CN101648741A CN101648741A CN200910041272A CN200910041272A CN101648741A CN 101648741 A CN101648741 A CN 101648741A CN 200910041272 A CN200910041272 A CN 200910041272A CN 200910041272 A CN200910041272 A CN 200910041272A CN 101648741 A CN101648741 A CN 101648741A
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Abstract
The invention relates to a recycling method of heavy metal in composite waste, comprising the steps of adding iron powder into composite waste to separate and recycle most of mixed metal powders, adding bodied ferric sulfate into waste water that is solid-liquid separated, and adding proper sodium sulphide, barium carbonate, calcium carbonate, gypsum powder and polyacrylamide in sequence, for separating to produce sludge containing heavy metal and waste water, then adding bodied ferric sulfate and polyacrylamide into the waste water, for separating to produce sludge containing heavy metal andpurified water. Sludge containing heavy metal is smelted and recycled to obtain the heavy metal through a wetting method or a drying method. The invention has the advantages of simple treatment process and operation, good recycling and processing effects and waste water is discharged after reaching standard.
Description
Technical field
The present invention relates to a kind of metal recovery processes of metallic trade effluent, particularly relate to the recovery method of heavy metal in a kind of composite waste.
Background technology
At present, for the composite waste that contains more organic, the various industrial sewage that contains various heavy, it is big to realize that simultaneously colourity that resource utilization reclaims heavy metal, the concentration that makes each heavy metal species in the waste water and waste water in the waste water is reduced to the emission standard target difficulty.
Summary of the invention
Technical problem to be solved: the invention provides the recovery method of heavy metal in a kind of treatment process and the composite waste simple to operate, realize that resource utilization reclaims heavy metal and the discharged wastewater met the national standard in the waste water.
Technical scheme: the recovery method of heavy metal is as follows in a kind of composite waste:
(1), contain the composite waste of various heavy, regulate pH between 1.0～3.5, add iron powder or iron plate, stirring reaction 100～120min, separating out and reclaiming most of heavy metal mainly is copper nickel heavy metal mixed metal powder;
(2), after the solid-liquid separation, in waste water, add bodied ferric sulfate, the pH regulator of waste water between 7.5～9.0, is stirred 5～10min, and adds an amount of Sodium Sulphide, barium carbonate, lime carbonate, terra alba in regular turn, stir 10min each the adding; Add polyacrylamide then, stir 10～15min; With the pressure filter press filtration, separate obtaining sludge containing heavy metal and waste water;
(3), isolating waste water in the step (2) is imported in treating pond, add bodied ferric sulfate, add alkali again and make pH=8.5, stir 5～10min fast, add polyacrylamide then, stir 8～12min, carry out press filtration at pressure filter, separate the waste water after obtaining sludge containing heavy metal and purifying;
(4), the sludge containing heavy metal of step (2), (3) gained is smelted by French or dry method and is reclaimed each heavy metal species.
Beneficial effect: treatment process of the present invention and simple to operate, be subjected to other composition influence of waste water little, heavy metal recovery and treatment effect are good.In the complicated composite waste treating processes, on the basis of process combination, only just realize the recovery of heavy metal, make the heavy metal concentration and the colourity qualified discharge of waste water simultaneously by twice solid-liquid separation.
Embodiment
Embodiment 1
To contain more organic, the various industrial sewage that contains various heavy, heavy metal content is the 5m of 18g/L
3Composite waste to high-order reduction pond, is regulated pH=2.0 with pump delivery, adds iron powder 65Kg (1m
3Composite waste adds iron powder 13Kg), stirring reaction 110min to be replacing most of heavy metal, and toxic heavy metal such as reduction of hexavalent chromium, for subsequent handling is prepared.From reduction pond bottom waste water is entered settling tank then, leave standstill solid-liquid separation after, obtain solid phase (heavy metal mixed metal powder such as copper nickel, 60Kg altogether), and liquid phase (waste water, 5m altogether
3) then rise to high-order neutralization tank with pump.
In neutralization tank, add coagulant polymeric ferric sulfate 7.5Kg, add alkali again and make pH=8.0, stir 5min fast, then add 7.5Kg Sodium Sulphide (removing heavy metals), 7.5Kg barium carbonate (removing nickel, chromium and cadmium), 15Kg lime carbonate (dechromisation, decolouring), 15Kg terra alba (removing barium) in regular turn, each stirs the 10min time.Add 0.18m then
3Massfraction is 0.15% polyacrylamide, stirs 11min.With pressure pump waste water is squeezed into pressure filter from the neutralization tank bottom at last and carry out press filtration, separate obtaining sludge containing heavy metal and waste water.Waste water is squeezed in the high-order treating pond with lift pump.
In treating pond, add coagulant polymeric ferric sulfate 5.5Kg, add sheet alkali again and make pH=8.5, stir 9min fast, add 0.07m then
3Massfraction is 0.15% polyacrylamide, stirs 10min.With pressure pump waste water is squeezed into pressure filter from the neutralization tank bottom at last and carry out press filtration, separate the waste water after obtaining sludge containing heavy metal and purifying.Each heavy metal species that waste water after these purify contains has reached discharging standards, and COD is reduced to 15300mg/L from 25500mg/L, and colourity is reduced to 80 times from 1152 times.
The sludge containing heavy metal of gained is smelted by wet method or dry method and is reclaimed each heavy metal species.
In the wastewater treatment process, the acid that is used for regulating the pH value can be industrial sulphuric acid, hydrochloric acid, nitric acid, and alkali can be common common alkaloids such as industrial sodium hydroxide, calcium hydroxide, magnesium hydroxide, lime carbonate, yellow soda ash.The acid that is used for regulating the pH value in reduction in the pond can also be sulfur waste acid, abraum salt acid, waste nitric acid, and alkali also can be the corresponding salkali waste of above-mentioned alkaloids.
Iron powder or iron plate can be industrial irons, also can be scrap iron.Coagulating agent is the inorganic polymer coagulant of various iron systems or aluminium system.The used in amounts of various medicaments will be determined with becoming to assign to according to the character of waste water.Each wastewater disposal basin is a steel reinforced concrete pool, surfaces externally and internally epoxy resin coating preservative coat.Pressure filter can be selected the plate and frame(type)filter press of Reinforced Polypropylene material for use.
Embodiment 2
To contain more organic, the various industrial sewage that contains various heavy, heavy metal content is the 10m of 20g/L
3Composite waste to high-order reduction pond, is regulated pH=1.0 with pump delivery.Add iron powder 130Kg (1m again
3Composite waste adds iron powder 13Kg), stirring reaction 120min to be replacing most of heavy metal, and toxic heavy metal such as reduction of hexavalent chromium, for subsequent handling is prepared.From reduction pond bottom waste water is entered settling tank then, leave standstill solid-liquid separation after, obtain solid phase (heavy metal mixed metal powder such as copper nickel, 130Kg altogether), and liquid phase (waste water, 10m altogether
3) then rise to high-order neutralization tank with pump.
In neutralization tank, add coagulant polymeric ferric sulfate 15Kg, add alkali again and make pH=7.5, stir 9min fast, then add 15Kg Sodium Sulphide (removing heavy metals), 15Kg barium carbonate (removing nickel, chromium and cadmium), 30Kg lime carbonate (dechromisation, decolouring), 30Kg terra alba (removing barium) in regular turn, each stirs the 10min time.Add 0.36m then
3Massfraction is 0.15% polyacrylamide, stirs 15min.With pressure pump waste water is squeezed into pressure filter from the neutralization tank bottom at last and carry out press filtration, separate obtaining sludge containing heavy metal and waste water.Waste water is squeezed in the high-order treating pond with lift pump.
In treating pond, add coagulant polymeric ferric sulfate 11Kg, add sheet alkali again and make pH=8.5, stir 10min fast, add 0.14m then
3Massfraction is 0.15% polyacrylamide, stirs 11min.With pressure pump waste water is squeezed into pressure filter from the neutralization tank bottom at last and carry out press filtration, separate the waste water after obtaining sludge containing heavy metal and purifying.Each heavy metal species that waste water after these purify contains has reached discharging standards.The sludge containing heavy metal of gained is smelted by wet method or dry method and is reclaimed each heavy metal species.
Embodiment 3
To contain more organic, the various industrial sewage that contains various heavy, heavy metal content is the 20m of 25g/L
3Composite waste to high-order reduction pond, is regulated pH=3.5 with pump delivery.Add iron powder 260Kg (1m again
3Composite waste adds iron powder 13Kg),, stirring reaction 100min to be replacing most of heavy metal, and toxic heavy metal such as reduction of hexavalent chromium, for subsequent handling is prepared.From reduction pond bottom waste water is entered settling tank then, leave standstill solid-liquid separation after, obtain solid phase (heavy metal mixed metal powder such as copper nickel, 260Kg altogether), and liquid phase (waste water, 20m altogether
3) then rise to high-order neutralization tank with pump.
In neutralization tank, add coagulant polymeric ferric sulfate 30Kg, add alkali again and make pH=9.0, stir 10min fast, then add 30Kg Sodium Sulphide (removing heavy metals), 30Kg barium carbonate (removing nickel, chromium and cadmium), 60Kg lime carbonate (dechromisation, decolouring), 60Kg terra alba (removing barium) in regular turn, each stirs the 10min time.Add 0.72m then
3Massfraction is 0.15% polyacrylamide, stirs 15min.With pressure pump waste water is squeezed into pressure filter from the neutralization tank bottom at last and carry out press filtration, separate obtaining sludge containing heavy metal and waste water.Waste water is squeezed in the high-order treating pond with lift pump.
In treating pond, add coagulant polymeric ferric sulfate 22Kg, add sheet alkali again and make pH=8.5, stir 10min fast, add 0.28m then
3Massfraction is 0.15% polyacrylamide, stirs 12min.With pressure pump waste water is squeezed into pressure filter from the neutralization tank bottom at last and carry out press filtration, separate the waste water after obtaining sludge containing heavy metal and purifying.Each heavy metal species that waste water after these purify contains has reached discharging standards.The sludge containing heavy metal of gained is smelted by wet method or dry method and is reclaimed each heavy metal species.
Embodiment 4
To contain more organic, the various industrial sewage that contains various heavy, heavy metal content is the 40m of 26g/L
3Composite waste to high-order reduction pond, is regulated pH=1.0 with pump delivery.Add iron powder 520Kg (1m again
3Composite waste adds iron powder 13Kg), stirring reaction 120min to be replacing most of heavy metal, and toxic heavy metal such as reduction of hexavalent chromium, for subsequent handling is prepared.From reduction pond bottom waste water is entered settling tank then, leave standstill solid-liquid separation after, obtain solid phase (heavy metal mixed metal powder such as copper nickel, 520Kg altogether), and liquid phase (waste water, 40m altogether
3) then rise to high-order neutralization tank with pump.
In neutralization tank, add coagulant polymeric ferric sulfate 60Kg, add alkali again and make pH=7.5, stir 8min fast, then add 60Kg Sodium Sulphide (removing heavy metals), 60Kg barium carbonate (removing nickel, chromium and cadmium), 120Kg lime carbonate (dechromisation, decolouring), 120Kg terra alba (removing barium) in regular turn, each stirs the 10min time.Add 1.44m then
3Massfraction is 0.15% polyacrylamide, stirs 10min.With pressure pump waste water is squeezed into pressure filter from the neutralization tank bottom at last and carry out press filtration, separate obtaining sludge containing heavy metal and waste water.Waste water is squeezed in the high-order treating pond with lift pump.
In treating pond, add coagulant polymeric ferric sulfate 44Kg, add sheet alkali again and make pH=8.5, stir 5min fast, add 0.56m then
3Massfraction is 0.15% polyacrylamide, stirs 10min.With pressure pump waste water is squeezed into pressure filter from the neutralization tank bottom at last and carry out press filtration, separate the waste water after obtaining sludge containing heavy metal and purifying.Each heavy metal species that waste water after these purify contains has reached discharging standards.
The sludge containing heavy metal of gained is smelted by wet method or dry method and is reclaimed each heavy metal species.
Claims (1)
1, the recovery method of heavy metal in a kind of composite waste is characterized in that method is as follows:
(1), contain the composite waste of various heavy, regulate pH between 1.0～3.5, add iron powder or iron plate, stirring reaction 100～120min, separating out and reclaiming most of heavy metal mainly is copper nickel heavy metal mixed metal powder;
(2), after the solid-liquid separation, in waste water, add bodied ferric sulfate, the pH regulator of waste water between 7.5～9.0, is stirred 5～10min, and adds an amount of Sodium Sulphide, barium carbonate, lime carbonate, terra alba in regular turn, stir 10min each the adding; Add polyacrylamide then, stir 10～15min; With the pressure filter press filtration, separate obtaining sludge containing heavy metal and waste water;
(3), isolating waste water in the step (2) is imported in the treating pond, add bodied ferric sulfate, add alkali again and make pH=8.5, stir 5～10min fast, add polyacrylamide then, stir 8～12min, carry out press filtration at pressure filter, separate the waste water after obtaining sludge containing heavy metal and purifying;
(4), the sludge containing heavy metal of step (2), (3) gained is smelted by wet method or dry method and is reclaimed each heavy metal species.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN200910041272A CN101648741A (en) | 2009-07-17 | 2009-07-17 | Recycling method of heavy metal in composite waste |
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| CN200910041272A CN101648741A (en) | 2009-07-17 | 2009-07-17 | Recycling method of heavy metal in composite waste |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102765831A (en) * | 2012-07-25 | 2012-11-07 | 中南大学 | Purification method of wastewater containing heavy metal and arsenic |
| CN102910760A (en) * | 2012-10-31 | 2013-02-06 | 宣达实业集团温州环保科技有限公司 | Treatment process of contaminated acid containing heavy metals |
| CN103331145A (en) * | 2013-07-08 | 2013-10-02 | 湖北富邦科技股份有限公司 | Preparation method of heavy metal ion absorbent from phosphogypsum |
| CN103466761A (en) * | 2013-08-26 | 2013-12-25 | 苏州富奇诺水治理设备有限公司 | Industrial waste water treatment agent containing polymerization ferric chloride |
| CN104649350A (en) * | 2015-03-13 | 2015-05-27 | 苏州能华节能环保科技有限公司 | Water purification material and preparation method thereof |
| CN105439239A (en) * | 2015-12-23 | 2016-03-30 | 佛山市雅洁源科技股份有限公司 | Material for water purification |
| CN105858830A (en) * | 2016-03-31 | 2016-08-17 | 太仓市锦达印染有限公司 | Decolorant for textile printing and dyeing wastewater |
| CN108947185A (en) * | 2018-09-20 | 2018-12-07 | 四川欧美华环境工程有限公司 | A kind of sludge modification diaphragm pressing Deep dehydration technique and system |
| CN109456092A (en) * | 2018-12-13 | 2019-03-12 | 南昌大学 | A method of with harmful heavy metal in metallic iron displacement livestock and poultry feces composting material |
-
2009
- 2009-07-17 CN CN200910041272A patent/CN101648741A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102765831A (en) * | 2012-07-25 | 2012-11-07 | 中南大学 | Purification method of wastewater containing heavy metal and arsenic |
| CN102910760A (en) * | 2012-10-31 | 2013-02-06 | 宣达实业集团温州环保科技有限公司 | Treatment process of contaminated acid containing heavy metals |
| CN103331145A (en) * | 2013-07-08 | 2013-10-02 | 湖北富邦科技股份有限公司 | Preparation method of heavy metal ion absorbent from phosphogypsum |
| CN103331145B (en) * | 2013-07-08 | 2014-12-31 | 湖北富邦科技股份有限公司 | Preparation method of heavy metal ion absorbent from phosphogypsum |
| CN103466761A (en) * | 2013-08-26 | 2013-12-25 | 苏州富奇诺水治理设备有限公司 | Industrial waste water treatment agent containing polymerization ferric chloride |
| CN104649350A (en) * | 2015-03-13 | 2015-05-27 | 苏州能华节能环保科技有限公司 | Water purification material and preparation method thereof |
| CN105439239A (en) * | 2015-12-23 | 2016-03-30 | 佛山市雅洁源科技股份有限公司 | Material for water purification |
| CN105858830A (en) * | 2016-03-31 | 2016-08-17 | 太仓市锦达印染有限公司 | Decolorant for textile printing and dyeing wastewater |
| CN108947185A (en) * | 2018-09-20 | 2018-12-07 | 四川欧美华环境工程有限公司 | A kind of sludge modification diaphragm pressing Deep dehydration technique and system |
| CN109456092A (en) * | 2018-12-13 | 2019-03-12 | 南昌大学 | A method of with harmful heavy metal in metallic iron displacement livestock and poultry feces composting material |
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Application publication date: 20100217 |