CN109467241A - The board wastewater treatment process of copper ion zero-emission - Google Patents
The board wastewater treatment process of copper ion zero-emission Download PDFInfo
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- CN109467241A CN109467241A CN201811264853.0A CN201811264853A CN109467241A CN 109467241 A CN109467241 A CN 109467241A CN 201811264853 A CN201811264853 A CN 201811264853A CN 109467241 A CN109467241 A CN 109467241A
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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
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
- C25C1/12—Electrolytic production, recovery or refining of metals by electrolysis of solutions of copper
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
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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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/041—Treatment of water, waste water, or sewage by heating by distillation or evaporation by means of vapour compression
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- 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
-
- 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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The present invention relates to a kind of board wastewater treatment process of copper ion zero-emission, including the following steps: S1, pretreatment；S2, primary filtering；S3, secondary filter；S4, it filters three times；S5, carbon are heavy；S6, a filters pressing；S7, evaporative crystallization；S8, secondary filters pressing；S9, electrolysis.The recycling of zero release of pollutant and copper, has accomplished sustained economic development and environmental protection after realization processing of the present invention.
Description
Technical field
The present invention relates to environment protection field, especially a kind of board wastewater treatment process of copper ion zero-emission.
Background technique
In wiring board production process, can generate a large amount of polish-brush waste water, generally clean waste water, organic wastewater, comprehensive wastewater,
Nickel-containing waste water, silver-containing waste water, cyanide wastewater, demoulding development waste-water etc., the waste water can not direct emission, need to handle it
It can be only achieved emission request, but the complex process of existing conventional process waste water, processing cost are high, generate sludge multiprocessing expense
It is expensive, and the copper resource in waste water can not be recycled, cause the waste of resource.
Summary of the invention
Based on this, it is necessary to provide a kind of board wastewater treatment process of copper ion zero-emission, including the following steps:
S1, pretreatment: pre-processing waste water using pretreatment system, to reduce the SDI value of waste water, to prevent its obstruction
Filter plant in subsequent technique；
S2, primary filtering: the waste water after will be pretreated is filtered using the first extraordinary membranous system, is obtained concentrate and is appeared
Liquid, wherein the system design rate of recovery is greater than or equal to 70%；
S3, secondary filter: concentrate obtained in once filtering is for re-filtering using the second extraordinary membranous system, obtains dense
Contracting liquid and peritoneal effluent, wherein the system design rate of recovery is greater than or equal to 70%；
S4, filter three times: by the obtained peritoneal effluent during primary filtering and secondary filter using third special type membranous system into
Row third time filters, and wherein the system design rate of recovery is greater than or equal to 75%, obtains concentrated water and permeate, and extremely by concentrate recirculation
First extraordinary membranous system continues filtration treatment, while peritoneal effluent being collected using reuse as industrial water；
S5, carbon are heavy: the mixed solution of sodium carbonate and sodium bicarbonate being added in the concentrate being obtained by filtration for the second time, makes concentrate
It is chemically reacted in carbon sinking system with the mixed solution of sodium carbonate and sodium bicarbonate, precipitation process then is carried out to it, is obtained
To solid precipitating and supernatant；
S6, a filters pressing: filters pressing is carried out to fixed precipitate, and makes the liquid reflux generated after filters pressing into carbon sinking system, is carried out
Carbon is heavy, and the solid precipitating generated after filters pressing enters the molten system of acid, carries out the molten processing of acid to fixed precipitate；
S7, evaporative crystallization: the supernatant obtained after carbon is heavy enters MVR evaporative crystallization, is evaporated crystallization, obtains fixed useless
Object；
S8, secondary filters pressing: acid it is molten after liquid enter in secondary press filteration system, carry out filters pressing again, obtain filters pressing solid and
Filter liquor, and the solid waste after filters pressing solid and evaporative crystallization is unified into collection processing；
S9, electrolysis: filter liquor enters electrolysis system, is electrolysed to obtain copper products.
Preferably, the special membrane in the described first extraordinary membranous system is NF film, and the special membrane in the second extraordinary membranous system is
NF film, the special membrane in third special type membranous system are RO film.
UF film is that a kind of aperture specification is consistent, the filter membrane that nominal pore range is 0.01 micron, to filter out in waste water
Bacterium and colloid, iron rust, suspended matter, silt, the larger molecular organics more much bigger than bacterium volume etc.；Nanofiltration membrane aperture exists
1nm or more, general 1-2nm, the molecular weight for retaining organic matter is about 150-500 or so, and the ability of retention dissolubility salt is
Between 2-98%, for removing the organic matter in waste water, partial solubility salt etc.；RO membrane aperture as low as nanoscale, certain
Under pressure, hydrone in waste water can be inorganic salts, heavy metal ion, organic matter, colloid in waste water, thin by RO film
The impurity such as bacterium, virus can not by RO film, thus filter out the inorganic salts in waste water, heavy metal ion, organic matter, colloid, bacterium,
The impurity such as virus.
Preferably, in step S5, control reaction temperature is 40-50 DEG C, and reaction end pH value is 7-8.
Preferably, a filters pressing and secondary filters pressing are all made of plate compression technique.
The filtered driving force of plate compression is big, filter cake solid content is high, filtrate is limpid, solid recovery rate is high, conditioning drug
Consumption is few.
Preferably, in the molten system of acid, the solid precipitating generated after filters pressing is dissolved using sulfuric acid, concentration is
50%~80%.
Preferably, in MVR evaporation and crystallization system, control inflow is 8-10 ton/hours.
MVR evaporator is a kind of novel high-efficiency and energy-saving evaporation equipment, and the equipment is using low temperature and low-pressure steam steaming technique and clearly
The clean energy is that the energy generates steam, and the water in medium is separated, resource needed for the effectively save evaporative crystallization of energy.
Preferably, in electrolysis system, copper ion concentration 30-60g/L, current density 500-2000A/m2, electrolysis time
For 3-8h.
The principle of the present invention, effect are further illustrated below with reference to above-mentioned technical proposal:
The present invention has the following advantages that and the technical effect of high-lighting: 1. saving dosage, realizes board wastewater regeneration
To production line.2. board wastewater processing method of the invention can recycle a large amount of metallic coppers, it is 3. of the invention to obtain economic benefit
Board wastewater processing method, zero release of pollutant after realization processing, has accomplished sustained economic development and environmental protection.
Detailed description of the invention
Fig. 1 is the process flow chart of the board wastewater treatment process of copper ion zero-emission described in the embodiment of the present invention.
Specific embodiment
In order to facilitate the understanding of those skilled in the art, below in conjunction with embodiment, the invention will be described in further detail:
Wherein the present invention mentioned in equipment be equipment possessed by the prior art, can market buy obtained by.
Embodiment 1
A kind of board wastewater treatment process of copper ion zero-emission, including the following steps:
S1, pretreatment: pre-processing waste water using pretreatment system, it is pretreated after waste water SDI value be 4；
S2, primary filtering: the waste water after will be pretreated is filtered using the first extraordinary membranous system, and system designs the rate of recovery
Equal to 70%, concentrate and peritoneal effluent are obtained, copper ion concentration is 4.9mg/L, TDS 1890mg/L in peritoneal effluent, in concentrate
Copper ion concentration 1009mg/L, TDS 5304mg/L；
S3, secondary filter: concentrate obtained in once filtering is for re-filtering using the second extraordinary membranous system, system
Design the rate of recovery be equal to 70%, obtain concentrate and peritoneal effluent, in peritoneal effluent copper ion concentration be 10mg/L, TDS 530mg/L,
Copper ion concentration 5139mg/L in concentrate, TDS 28380mg/L；
S4, filter three times: by the obtained peritoneal effluent during primary filtering and secondary filter using third special type membranous system into
Row third time filters, and system designs the rate of recovery and is equal to 75%, obtains concentrated water and permeate, the copper ion concentration of peritoneal effluent
0.1mg/L, TDS 32mg/L, copper ion concentration 36.7mg/L, the TDS 6592mg/L of concentrated water, and by concentrate recirculation to
One extraordinary membranous system continues filtration treatment, while peritoneal effluent being collected using reuse as industrial water；
S5, carbon are heavy: the mixed solution of sodium carbonate and sodium bicarbonate being added in the concentrate being obtained by filtration for the second time, makes concentrate
It is chemically reacted in carbon sinking system with the mixed solution of sodium carbonate and sodium bicarbonate, precipitation process is then carried out to it, and
Controlling reaction temperature is 40 DEG C, and reaction end pH value is 7, obtains solid precipitating and supernatant；
S6, a filters pressing: filters pressing is carried out to fixed precipitate, and makes the liquid reflux generated after filters pressing into carbon sinking system, is carried out
Carbon is heavy, and the solid precipitating generated after filters pressing enters the molten system of acid, carries out the molten processing of acid to fixed precipitate using sulfuric acid, wherein sulphur
The concentration of acid is 50%；
S7, evaporative crystallization: the supernatant obtained after carbon is heavy enters MVR evaporative crystallization, and control inflow is 8 ton/hours, carries out
Evaporative crystallization obtains immobilized waste；
S8, secondary filters pressing: acid it is molten after liquid enter in secondary press filteration system, carry out filters pressing again, obtain filters pressing solid and
Filter liquor, and the solid waste after filters pressing solid and evaporative crystallization is unified into collection processing；
S9, electrolysis: filter liquor enters electrolysis system, in electrolysis system, copper ion concentration 30g/L, current density 500A/
m2, electrolysis time 3h is electrolysed to obtain copper products.
Embodiment 2
A kind of board wastewater treatment process of copper ion zero-emission, including the following steps:
S1, pretreatment: pre-processing waste water using pretreatment system, it is pretreated after waste water SDI value be 4；
S2, primary filtering: the waste water after will be pretreated is filtered using the NF film in the first extraordinary membranous system, and system is set
Count the rate of recovery be equal to 70%, obtain concentrate and peritoneal effluent, in peritoneal effluent copper ion concentration be 4.2mg/L, TDS 1871mg/L,
Copper ion concentration 1001mg/L in concentrate, TDS 5298mg/L；
S3, secondary filter: concentrate obtained in primary filtering is subjected to mistake again using the NF film in the second extraordinary membranous system
Filter, system design the rate of recovery and are equal to 70%, obtain concentrate and peritoneal effluent, and copper ion concentration is 8mg/L in peritoneal effluent, and TDS is
511mg/L, copper ion concentration 5098mg/L, TDS 28128mg/L in concentrate；
S4, filter three times: by the obtained peritoneal effluent during primary filtering and secondary filter using third special type membranous system into
Row third time filters, and system designs the rate of recovery and is equal to 75%, obtains concentrated water and permeate, the copper ion concentration of peritoneal effluent
0.1mg/L, TDS 29mg/L, copper ion concentration 35.4mg/L, the TDS 6507mg/L of concentrated water, and by concentrate recirculation to
One extraordinary membranous system continues filtration treatment, while peritoneal effluent being collected using reuse as industrial water；
S5, carbon are heavy: the mixed solution of sodium carbonate and sodium bicarbonate being added in the concentrate being obtained by filtration for the second time, makes concentrate
It is chemically reacted in carbon sinking system with the mixed solution of sodium carbonate and sodium bicarbonate, precipitation process is then carried out to it, and
Controlling reaction temperature is 50 DEG C, and reaction end pH value is 8, obtains solid precipitating and supernatant；
S6, a filters pressing: filters pressing is carried out to fixed precipitate, and makes the liquid reflux generated after filters pressing into carbon sinking system, is carried out
Carbon is heavy, and the solid precipitating generated after filters pressing enters the molten system of acid, carries out the molten processing of acid to fixed precipitate using sulfuric acid, wherein sulphur
The concentration of acid is 80%；
S7, evaporative crystallization: the supernatant obtained after carbon is heavy enters MVR evaporative crystallization, and control inflow is 10 ton/hours, into
Row evaporative crystallization, obtains immobilized waste；
S8, secondary filters pressing: acid it is molten after liquid enter in secondary press filteration system, carry out filters pressing again, obtain filters pressing solid and
Filter liquor, and the solid waste after filters pressing solid and evaporative crystallization is unified into collection processing；
S9, electrolysis: filter liquor enters electrolysis system, in electrolysis system, copper ion concentration 30g/L, current density 2000A/
m2, electrolysis time 8h is electrolysed to obtain copper products.
Embodiment 3
A kind of board wastewater treatment process of copper ion zero-emission, including the following steps:
S1, pretreatment: pre-processing waste water using pretreatment system, it is pretreated after waste water SDI value be 4；
S2, primary filtering: the waste water after will be pretreated is filtered using the NF film in the first extraordinary membranous system, and system is set
Count the rate of recovery be equal to 70%, obtain concentrate and peritoneal effluent, in peritoneal effluent copper ion concentration be 4.5mg/L, TDS 1899mg/L,
Copper ion concentration 1015mg/L in concentrate, TDS 5307mg/L；
S3, secondary filter: concentrate obtained in primary filtering is subjected to mistake again using the NF film in the second extraordinary membranous system
Filter, system design the rate of recovery and are equal to 70%, obtain concentrate and peritoneal effluent, and copper ion concentration is 9mg/L in peritoneal effluent, and TDS is
520mg/L, copper ion concentration 5108mg/L, TDS 28222mg/L in concentrate；
S4, filter three times: by the obtained peritoneal effluent during primary filtering and secondary filter using third special type membranous system into
Row third time filters, and system designs the rate of recovery and is equal to 75%, obtains concentrated water and permeate, the copper ion concentration of peritoneal effluent
0.1mg/L, TDS 31mg/L, copper ion concentration 35.7mg/L, the TDS 6547mg/L of concentrated water, and by concentrate recirculation to
One extraordinary membranous system continues filtration treatment, while peritoneal effluent being collected using reuse as industrial water；
S5, carbon are heavy: the mixed solution of sodium carbonate and sodium bicarbonate being added in the concentrate being obtained by filtration for the second time, makes concentrate
It is chemically reacted in carbon sinking system with the mixed solution of sodium carbonate and sodium bicarbonate, precipitation process is then carried out to it, and
Controlling reaction temperature is 45 DEG C, and reaction end pH value is 7.5, obtains solid precipitating and supernatant；
S6, a filters pressing: filters pressing is carried out to fixed precipitate, and makes the liquid reflux generated after filters pressing into carbon sinking system, is carried out
Carbon is heavy, and the solid precipitating generated after filters pressing enters the molten system of acid, carries out the molten processing of acid to fixed precipitate using sulfuric acid, wherein sulphur
The concentration of acid is 65%；
S7, evaporative crystallization: the supernatant obtained after carbon is heavy enters MVR evaporative crystallization, and control inflow is 9 ton/hours, carries out
Evaporative crystallization obtains immobilized waste；
S8, secondary filters pressing: acid it is molten after liquid enter in secondary press filteration system, carry out filters pressing again, obtain filters pressing solid and
Filter liquor, and the solid waste after filters pressing solid and evaporative crystallization is unified into collection processing；
S9, electrolysis: filter liquor enters electrolysis system, in electrolysis system, copper ion concentration 30g/L, current density 1200A/
m2, electrolysis time 5.5h is electrolysed to obtain copper products.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (7)
1. a kind of board wastewater treatment process of copper ion zero-emission, characterized in that it comprises the following steps:
S1, pretreatment: pre-processing waste water using pretreatment system, to reduce the SDI value of waste water, after preventing it from blocking
Filter plant in continuous technique；
S2, primary filtering: the waste water after will be pretreated is filtered using the first extraordinary membranous system, is obtained concentrate and is appeared
Liquid, wherein the system design rate of recovery is greater than or equal to 70%；
S3, secondary filter: concentrate obtained in once filtering is for re-filtering using the second extraordinary membranous system, obtains dense
Contracting liquid and peritoneal effluent, wherein the system design rate of recovery is greater than or equal to 70%；
S4, filter three times: by the obtained peritoneal effluent during primary filtering and secondary filter using third special type membranous system into
Row third time filters, and wherein the system design rate of recovery is greater than or equal to 75%, obtains concentrated water and permeate, and extremely by concentrate recirculation
First extraordinary membranous system continues filtration treatment, while peritoneal effluent being collected using reuse as industrial water；
S5, carbon are heavy: the mixed solution of sodium carbonate and sodium bicarbonate being added in the concentrate being obtained by filtration for the second time, makes concentrate
It is chemically reacted in carbon sinking system with the mixed solution of sodium carbonate and sodium bicarbonate, precipitation process then is carried out to it, is obtained
To solid precipitating and supernatant；
S6, a filters pressing: filters pressing is carried out to fixed precipitate, and makes the liquid reflux generated after filters pressing into carbon sinking system, is carried out
Carbon is heavy, and the solid precipitating generated after filters pressing enters the molten system of acid, carries out the molten processing of acid to fixed precipitate；
S7, evaporative crystallization: the supernatant obtained after carbon is heavy enters MVR evaporative crystallization, is evaporated crystallization, obtains fixed useless
Object；
S8, secondary filters pressing, acid it is molten after liquid enter in secondary press filteration system, carry out filters pressing again, obtain filters pressing solid and
Filter liquor, and the solid waste after filters pressing solid and evaporative crystallization is unified into collection processing；
S9, electrolysis: filter liquor enters electrolysis system, is electrolysed to obtain copper products.
2. the board wastewater treatment process of copper ion zero-emission according to claim 1, which is characterized in that first special membrane
Special membrane in system is NF film, and the special membrane in the second extraordinary membranous system is NF film, the special membrane in third special type membranous system
For RO film.
3. the board wastewater treatment process of copper ion zero-emission according to claim 1, which is characterized in that in step S5, control
Reaction temperature is 40-50 DEG C, and reaction end pH value is 7-8.
4. the board wastewater treatment process of copper ion zero-emission according to claim 1, which is characterized in that a filters pressing and secondary
Filters pressing is all made of plate compression technique.
5. the board wastewater treatment process of copper ion zero-emission according to claim 1, which is characterized in that in the molten system of acid, adopt
The solid precipitating generated after filters pressing is dissolved with sulfuric acid, concentration is 50%~80%.
6. the board wastewater treatment process of copper ion zero-emission according to claim 1, which is characterized in that MVR evaporative crystallization system
In system, control inflow is 8-10 ton/hours.
7. the board wastewater treatment process of copper ion zero-emission according to claim 1, which is characterized in that in electrolysis system, copper
Ion concentration is 30-60g/L, current density 500-2000A/m2, electrolysis time 3-8h.
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| CN113213678A (en) * | 2021-05-14 | 2021-08-06 | 深圳市臻鼎环保科技有限公司 | Treatment method of PCB (printed circuit board) acid copper-containing cleaning wastewater |
| CN114409165A (en) * | 2022-01-25 | 2022-04-29 | 钟越红 | Circuit board wastewater treatment equipment and treatment method thereof |
| CN115259488A (en) * | 2022-08-04 | 2022-11-01 | 成都美富特环保产业集团有限公司 | Treatment system and treatment method for acidic copper-containing wastewater |
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