CN110078282A - A kind of heavy metal waste water treatment process - Google Patents
A kind of heavy metal waste water treatment process Download PDFInfo
- Publication number
- CN110078282A CN110078282A CN201910321161.3A CN201910321161A CN110078282A CN 110078282 A CN110078282 A CN 110078282A CN 201910321161 A CN201910321161 A CN 201910321161A CN 110078282 A CN110078282 A CN 110078282A
- Authority
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- Prior art keywords
- waste water
- heavy metal
- exchange resin
- resin
- treatment process
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
-
- 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
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- 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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/425—Treatment of water, waste water, or sewage by ion-exchange using cation exchangers
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
The invention discloses a kind of heavy metal waste water treatment process, and the heavy metal species waste water treatment process is the following steps are included: step 1: waste water is pumped into pH conditioning tank；Step 2: cation exchange resin, Liquidity limit are added；Step 3: waste water adds anion exchange resin, adsorpting anion, supernatant liquor qualified discharge or reuse after being pumped into intermediate pool；Step 4: being delivered to coagulating sedimentation reactor for intermediate pool bottom waste water, and supernatant liquor carries out low-temperature reduced-pressure distillation processing, generates condensate liquid qualified discharge or reuse, base sludge are discharged into sludge-tank；Step 5: distillation dope is dehydrated after mixing with sludge through plate and frame filter press, the outer processing of mud cake committee；Step 6: resin re-uses in step 2, and cell reaction removes metallic copper or nickel；Step 7: coagulating sedimentation reactor is transported to after the mixing of pressure filtration yielding water residual electrolyte.By the above-mentioned means, the present invention can directly recycle heavy metal copper/nickel, low energy consumption, regenerating easily, and effluent quality is good.
Description
Technical field
The present invention relates to technical field of waste water processing, more particularly to a kind of plating copper-containing wastewater or Ni-containing Plating Wastewater
Heavy metal waste water treatment process.
Background technique
The water outlet salinity of traditional heavy-metal waste water treatment device is high, and qualified discharge water still has certain harm to environment
Property, traditional a large amount of metal sludge of heavy-metal waste water treatment device generation, Heavy Metal Level In Sludge is high, be easy to cause secondary
Pollution, while a large amount of wastes of resource are also resulted in, evaporative crystallization involved in traditional heavy metal waste water treatment process, evaporative crystallization dress
Energy consumption height is set, blocking pipeline is easy in evaporation and crystal process, is based on disadvantages described above and deficiency, it is necessary to give existing technology
It improves.
Summary of the invention
The invention mainly solves the technical problem of providing a kind of heavy metal waste water treatment process, can directly recycle a huge sum of money
Belong to copper/nickel, while realizing resource reclaim, reduce the yield of danger wastes, reduces the risk that secondary pollution occurs, energy consumption
It is low, it can effectively reduce the risk of evaporation tubes blocking, resin adsorption capacity is big, regenerating easily, and effluent quality is good, and water outlet can reach
Recycle water standard.
In order to solve the above technical problems, one technical scheme adopted by the invention is that: a kind of heavy metal containing wastewater treatment is provided
Technique, the heavy metal species waste water treatment process the following steps are included:
Step 1: being stored in accumulator tank after plating copper-containing wastewater or Ni-containing Plating Wastewater are collected, and will give up in accumulator tank
Water is pumped into pH conditioning tank, and sodium hydroxide or sulfuric acid are added in pH conditioning tank；
Step 2: pH conditioning tank 2, which regulates, adds cation exchange resin after pH, in cationic exchange resin adsorption waste water
Cation, the cation in waste water and the H on cation exchange resin+It swaps, the cation in waste water is transferred to tree
On rouge, cation includes Na+、Ca2+、K+、Mg2+And Fe3+, H on resin+Exchange in water, after add regenerative agent, cation is handed over
Change resin regeneration；
Step 3: cationic waste water is removed in step 2 and is pumped into intermediate pool, acid-base accommodation pH is added, after regulating pH
Intermediate pool in add anion exchange resin, anion exchange resin adsorbs the anion in waste water, the anion in water
With the OH on anion exchange resin-It swaps, the anion in waste water is transferred on resin, and anion includes Cl-With
HCO3 -, OH on resin-Exchange in water, intermediate pool supernatant liquor qualified discharge or reuse, after add regenerative agent, anion
Exchanger resin regeneration；
Step 4: intermediate pool bottom waste water is delivered to coagulating sedimentation reactor, is added in coagulating sedimentation reactor
Coagulant PAC and flocculant PAM carries out coagulation-flocculation reaction, and coagulating sedimentation reactor supernatant liquor carries out at low-temperature reduced-pressure distillation
Reason, low-temperature reduced-pressure distillation generates condensate liquid qualified discharge or reuse, coagulating sedimentation reactor bottom coagulated sludge are discharged into dirt
Mud sump；
Step 5: low-temperature reduced-pressure distillation is generated after distillation dope is mixed with sludge in sludge-tank and is dehydrated through plate and frame filter press,
The outer processing of mud cake committee；
Step 6: cation exchange resin repeated regeneration is to neutrality in step 2, the cation regeneration being adsorbed on resin
Afterwards, resin re-uses, and carries out electrolysis processing to regeneration acid solution, cell reaction removes metallic copper or nickel；
Step 7: it is heavy that coagulation is transported to after residual electrolyte mixing in the pressure filtration yielding water and step 6 of step 5 center filter press
Shallow lake reactor re-starts low-temperature reduced-pressure distillation crystallization.
Preferably, H in step 2+With OH in step 3-Water is combined into, to achieve the purpose that desalination.
Preferably, electrolysis cathode is connected with power cathode in step 6, reaction principle are as follows: 2Cu2++4e-=2Cu, electrolysis
Anode is connected with positive pole, reaction principle are as follows: 4OH-+4e-=O2+2H2O。
Preferably, regenerative agent uses sulfuric acid in the step 2.
Preferably, regenerative agent uses sodium hydroxide in the step 3.
Compared with prior art, the beneficial effects of the present invention are:
Electrolysis method can directly recycle heavy metal copper/nickel, and compared with traditional resource reclaim, recycling product purity is high, is not necessarily to
It purifies again, it is good compared with other recycling values of the product height, quality, while realizing resource reclaim, the yield of danger wastes is reduced,
Reduce the risk that secondary pollution occurs；
Raffinate concentration is carried out using low-temperature reduced-pressure distillation mode, low energy consumption, can effectively reduce the risk of evaporation tubes blocking；
Cation exchange resin and anion exchange resin use pure water anion-cation exchange resin, resin adsorption capacity
Greatly, regenerating easily, effluent quality is good, and water outlet can reach recycle water standard；
Water outlet is softened water and evaporation condensate, and effluent quality is good, can be with fully recovering.
Detailed description of the invention
Fig. 1 is a kind of flow chart of heavy metal waste water treatment process.
Specific embodiment
Present pre-ferred embodiments are described in detail with reference to the accompanying drawing, so as to can be easier to the advantages of invention with feature
In being readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
Referring to Fig. 1, the embodiment of the present invention includes:
A kind of heavy metal waste water treatment process, the heavy metal species waste water treatment process the following steps are included:
Step 1: being stored in accumulator tank 1 after plating copper-containing wastewater or Ni-containing Plating Wastewater are collected, will be in accumulator tank 1
Waste water is pumped into pH conditioning tank 2, and sodium hydroxide or sulfuric acid are added in pH conditioning tank 2；
Step 2: pH conditioning tank 2, which regulates, adds cation exchange resin after pH, in cationic exchange resin adsorption waste water
Cation, in ion exchange process, the cation in waste water and the H on cation exchange resin+It swaps, in waste water
Cation is transferred on resin, and cation includes Na+、Ca2+、K+、Mg2+And Fe3+Deng H on resin+It exchanges in water, after
Add regenerative agent sulfuric acid, cation exchange resin regeneration；
Step 3: cationic waste water is removed in step 2 and is pumped into intermediate pool 3, acid-base accommodation pH is added, regulates pH
Add anion exchange resin in intermediate pool 3 afterwards, anion exchange resin adsorbs the anion in waste water, the yin in water from
Son and the OH on anion exchange resin-It swaps, the anion in waste water is transferred on resin, and anion includes Cl-With
HCO3 -Deng, and the OH on resin-It exchanges in water, H in step 2+With OH-Water is combined into, thus achieve the purpose that desalination, in
Between 3 supernatant liquor qualified discharge of pond or reuse, after add regenerative agent sodium hydroxide, anion exchange resin regeneration；
Step 4: 3 bottom waste water of intermediate pool is delivered to coagulating sedimentation reactor 4, is thrown in coagulating sedimentation reactor 4
Coagulant PAC and flocculant PAM is added to carry out coagulation-flocculation reaction, 4 supernatant liquor of coagulating sedimentation reactor carries out low-temperature reduced-pressure steaming
Processing is evaporated, low-temperature reduced-pressure distillation generates condensate liquid qualified discharge or reuse, 4 bottom coagulated sludge of coagulating sedimentation reactor row
Enter sludge-tank 5；
Step 5: low-temperature reduced-pressure distillation generates de- through plate and frame filter press 6 after distillation dope is mixed with sludge in sludge-tank 5
Water, the outer processing of mud cake committee；
Step 6: cation exchange resin repeated regeneration is to neutrality in step 2, the cation regeneration being adsorbed on resin
Afterwards, resin re-uses, and carries out electrolysis processing to regeneration acid solution, electrolysis cathode is connected with power cathode, reaction principle are as follows: 2Cu2+
+4e-=2Cu, electrolytic anode are connected with positive pole, reaction principle are as follows: 4OH-+4e-=O2+2H2O, cell reaction remove metal
Copper or nickel；
Step 7: coagulation is transported to after residual electrolyte mixing in the pressure filtration yielding water and step 6 of step 5 center filter press 6
Precipitation reactor 4 re-starts low-temperature reduced-pressure distillation crystallization.
A kind of heavy metal waste water treatment process of the present invention, can directly recycle heavy metal copper/nickel, realize the same of resource reclaim
When, the yield of danger wastes is reduced, the risk that secondary pollution occurs is reduced, low energy consumption, and it is stifled to can effectively reduce evaporation tubes
The risk of plug, resin adsorption capacity is big, regenerating easily, and effluent quality is good, and water outlet can reach recycle water standard.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (5)
1. a kind of heavy metal waste water treatment process, it is characterised in that: the heavy metal species waste water treatment process the following steps are included:
Step 1: it is stored in accumulator tank after plating copper-containing wastewater or Ni-containing Plating Wastewater are collected, by waste water pump in accumulator tank
Enter into pH conditioning tank, sodium hydroxide or sulfuric acid are added in pH conditioning tank；
Step 2: pH conditioning tank 2, which regulates, adds cation exchange resin after pH, cationic exchange resin adsorption waste water middle-jiao yang, function of the spleen and stomach from
Son, the cation in waste water and the H on cation exchange resin+It swapping, the cation in waste water is transferred on resin,
Cation includes Na+、Ca2+、K+、Mg2+And Fe3+, H on resin+Exchange in water, after add regenerative agent, cation exchange tree
Rouge regeneration；
Step 3: cationic waste water is removed in step 2 and is pumped into intermediate pool, acid-base accommodation pH is added, regulates in after pH
Between anion exchange resin is added in pond, anion exchange resin adsorbs the anion in waste water, anion and yin in water
OH on ion exchange resin-It swaps, the anion in waste water is transferred on resin, and anion includes Cl-And HCO3 -,
OH on resin-Exchange in water, intermediate pool supernatant liquor qualified discharge or reuse, after add regenerative agent, anion exchange
Resin regeneration；
Step 4: intermediate pool bottom waste water is delivered to coagulating sedimentation reactor, adds coagulation in coagulating sedimentation reactor
Agent PAC and flocculant PAM carries out coagulation-flocculation reaction, and coagulating sedimentation reactor supernatant liquor carries out low-temperature reduced-pressure distillation processing,
Low-temperature reduced-pressure distillation generates condensate liquid qualified discharge or reuse, coagulating sedimentation reactor bottom coagulated sludge are discharged into sludge
Pond；
Step 5: low-temperature reduced-pressure distillation is generated after distillation dope is mixed with sludge in sludge-tank and is dehydrated through plate and frame filter press, mud cake
The outer processing of committee；
Step 6: cation exchange resin repeated regeneration is set after being adsorbed on the cation regeneration on resin to neutrality in step 2
Rouge re-uses, and carries out electrolysis processing to regeneration acid solution, cell reaction removes metallic copper or nickel；
Step 7: it is anti-that coagulating sedimentation is transported to after residual electrolyte mixing in the pressure filtration yielding water and step 6 of step 5 center filter press
Device is answered, low-temperature reduced-pressure distillation crystallization is re-started.
2. a kind of heavy metal waste water treatment process according to claim 1, it is characterised in that: H in step 2+With step 3
Middle OH-Water is combined into, to achieve the purpose that desalination.
3. a kind of heavy metal waste water treatment process according to claim 1, it is characterised in that: in step 6 electrolysis cathode with
Power cathode is connected, reaction principle are as follows: 2Cu2++4e-=2Cu, electrolytic anode are connected with positive pole, reaction principle are as follows: 4OH-+
4e-=O2+2H2O。
4. a kind of heavy metal waste water treatment process according to claim 1, it is characterised in that: regenerative agent in the step 2
Using sulfuric acid.
5. a kind of heavy metal waste water treatment process according to claim 1, it is characterised in that: regenerative agent in the step 3
Using sodium hydroxide.
Priority Applications (1)
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| CN201910321161.3A CN110078282A (en) | 2019-04-19 | 2019-04-19 | A kind of heavy metal waste water treatment process |
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| CN201910321161.3A CN110078282A (en) | 2019-04-19 | 2019-04-19 | A kind of heavy metal waste water treatment process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112694217A (en) * | 2020-12-22 | 2021-04-23 | 南京市利澜电力节能科技有限公司 | Power plant industrial wastewater treatment system and treatment method |
| CN114620875A (en) * | 2022-01-28 | 2022-06-14 | 上海中欣晶圆半导体科技有限公司 | Method for separating and treating waste sewage of grinding machine |
| CN115140877A (en) * | 2022-07-19 | 2022-10-04 | 北京富锐清源环保设备有限责任公司 | Closed-loop treatment process for upgrading and recycling standard-reaching sewage |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112694217A (en) * | 2020-12-22 | 2021-04-23 | 南京市利澜电力节能科技有限公司 | Power plant industrial wastewater treatment system and treatment method |
| CN114620875A (en) * | 2022-01-28 | 2022-06-14 | 上海中欣晶圆半导体科技有限公司 | Method for separating and treating waste sewage of grinding machine |
| CN115140877A (en) * | 2022-07-19 | 2022-10-04 | 北京富锐清源环保设备有限责任公司 | Closed-loop treatment process for upgrading and recycling standard-reaching sewage |
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