CN115465998A - Heavy metal wastewater treatment method and treatment equipment thereof - Google Patents
Heavy metal wastewater treatment method and treatment equipment thereof Download PDFInfo
- Publication number
- CN115465998A CN115465998A CN202211201268.2A CN202211201268A CN115465998A CN 115465998 A CN115465998 A CN 115465998A CN 202211201268 A CN202211201268 A CN 202211201268A CN 115465998 A CN115465998 A CN 115465998A
- Authority
- CN
- China
- Prior art keywords
- stage
- heavy metal
- treatment
- membrane
- metal wastewater
- Prior art date
- 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.)
- Pending
Links
Images
Classifications
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- 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
-
- 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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- 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
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- 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
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to a treatment method of heavy metal wastewater, which sequentially comprises a first-stage materialization treatment, a second-stage UF ultrafiltration membrane treatment and a third-stage RO + seawater desalination membrane treatment; the first-stage materialization treatment comprises the following specific steps: heavy metal wastewater enters a collecting tank after being collected and mixed and then enters a reaction tank; sequentially adding a heavy metal capture agent, PAC and PAM into a reaction tank; separating mud and water under the action of gravity of a sedimentation tank; the supernatant enters an air floatation slag remover to remove suspended matters in the supernatant; sludge generated by the sedimentation tank and the air floatation slag remover is filtered and pressed by a high-pressure diaphragm filter press together, and then the sludge is transported outwards; the effluent is filtered by a multi-medium, an active carbon filter and a UF membrane; and the effluent enters a two-stage RO + seawater desalination membrane system for desalination and concentration. The invention has good treatment effect on heavy metal wastewater, the reuse water can reach the standard of pure water, and the invention completely meets the requirements of various workshop production water.
Description
Technical Field
The invention relates to the technical field of heavy metal wastewater treatment, in particular to a heavy metal wastewater treatment method and treatment equipment.
Background
The heavy metal wastewater is wastewater containing heavy metals discharged in the industrial production processes of mining and metallurgy, mechanical manufacturing, chemical industry, electronics, instruments and the like. Heavy metal (such as cadmium, nickel, mercury, zinc and the like) wastewater is one of industrial wastewater which has the most serious environmental pollution and the greatest harm to human beings, the water quality and the water quantity of the wastewater are related to a production process, and the heavy metal in the wastewater generally cannot be decomposed and destroyed and only can be transferred to the existing position and converted into the physical and chemical forms. In the prior art, after being treated, the general heavy metal wastewater reaches the discharge standard and is discharged, a small amount of heavy metal wastewater reaches the reclaimed water standard for recycling, most of heavy metal wastewater is directly filtered by a reverse osmosis membrane or by two-stage RO membranes, and the former has the defects of high membrane pressure and poor stability and often needs membrane removal treatment; the latter decreases the water yield with increasing amount of concentrate.
Disclosure of Invention
The invention aims to provide a heavy metal wastewater treatment method, which can effectively solve the problems of insufficient stability of a heavy metal wastewater treatment system and low effluent quality and water yield of the treatment method in the prior art.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a treatment method of heavy metal wastewater comprises a first-stage physicochemical treatment, a second-stage UF ultrafiltration membrane treatment and a third-stage RO + seawater desalination membrane treatment in sequence;
the first-stage materialization treatment comprises the following specific steps:
collecting and mixing heavy metal wastewater, feeding the heavy metal wastewater into a collecting tank, and feeding the heavy metal wastewater into a reaction tank;
sequentially adding a heavy metal capture agent, PAC and PAM into a reaction tank;
thirdly, separating mud from water under the action of gravity of a sedimentation tank;
step four, the supernatant enters an air floatation slag remover, and suspended matters in the supernatant are removed; sludge generated by the sedimentation tank and the air floatation slag remover is subjected to filter pressing by a high-pressure diaphragm filter press together, and then the sludge is transported outwards;
the second stage UF ultrafiltration membrane treatment comprises the following specific steps: the effluent is filtered by a multi-medium, an active carbon filter and a UF membrane;
the third-stage RO + seawater desalination membrane treatment comprises the following specific steps: and the effluent enters a two-stage RO + seawater desalination membrane system for desalination and concentration.
According to the description, the synergistic effect of the first-stage physicochemical treatment, the second-stage UF ultrafiltration membrane treatment and the third-stage RO + seawater desalination membrane treatment can enable heavy metal wastewater to be treated into reuse water, the seawater desalination membrane can treat salt in the wastewater, and the reuse water can reach the standard of pure water.
As a further scheme of the invention, the treatment method further comprises a DTRO concentrated water treatment after the third-stage RO + seawater desalination membrane treatment, and the DTRO concentrated water treatment comprises the following specific steps:
s1, enabling concentrated water to enter a DTRO system for further concentration to improve the salt content of the concentrated water;
and S2, reducing the evaporation capacity, evaporating by an evaporator, oxidizing the distilled water by an ozone system to remove part of COD, returning the distilled water to a two-stage RO + seawater desalination membrane system to produce water for recycling, and separating solid crystal salt from the evaporated concentrated solution by a centrifugal machine for outward transportation.
Compared with the electrodialysis treatment method and the EDR treatment used in the prior art, the DTRO system is a stacked die, has the advantages of large flux, high inlet pressure, strong pressure resistance, long-term stable operation of equipment and the like, can improve the salt content in the wastewater, and effectively reduce the salt content of the reuse water;
the electrodialysis treatment method can only remove electrolyte ions in water, but can not remove uncharged particles such as silicon, boron and organic matter particles in water, and if the bromine content in water is high, the electrodialysis removal effect is not ideal, the desalination effect is not thorough, and the water recovery rate is low; EDR processes are prone to fouling and require frequent cleaning and maintenance.
As a further proposal of the invention, the catching agent in the second step is a heavy complement agent with the concentration of 30 percent, and the adding amount is 5 to 10 percent of the weight of the waste water; the adding amount of PAC is 8-12% of the weight of the wastewater; the dosage of PAM is 0.3-0.5% of the weight of the waste water.
As can be seen from the above description, the heavy metal ion chelating agent can be a medicament capable of strongly chelating heavy metal ions in wastewater, and the heavy metal capturing agent can rapidly perform a chelating reaction with heavy metal ions in wastewater, such as chromium, nickel, copper, zinc, mercury, manganese and cadmium, to generate a water-insoluble polymer chelate flocculent precipitate, thereby achieving the purpose of completely removing the heavy metal ions; the hydrolysis product of PAC has excellent bridging adsorption effect on suspended matters in water; PAM carries out the flocculation and precipitation to the sewage that suspended particles take the negative charge in the sewage, effective clarification.
As a further scheme of the invention, the UF ultrafiltration membrane has the pore diameter of 0.03 mu m, the flux of 50-120L/square meter and hr, and is made of PVDF.
From the above description, it can be known that the UF ultrafiltration membrane of small pore size can thoroughly filter impurities in wastewater.
In a further embodiment of the present invention, the RO membrane has a pore size of less than 2nm and is made of a polyamide membrane composite.
As can be seen from the above description, the RO membrane with small pore diameter can thoroughly remove calcium, magnesium, bacteria, organic matters, inorganic matters, metal ions and radioactive substances in the water, and the backwater is clean.
As a further scheme of the invention, the seawater desalination membrane has the filtration precision of 1nm and is made of a polyamide modified composite membrane.
As can be known from the above description, the seawater desalination membrane with the filtration precision of 1nm can thoroughly filter out salt ions in the wastewater, and clean water enters the evaporator.
The heavy metal wastewater treatment equipment comprises a first-stage materialization treatment part, a second-stage UF ultrafiltration membrane treatment part and a third-stage RO + seawater desalination membrane treatment part, wherein the first-stage materialization treatment part, the second-stage UF ultrafiltration membrane treatment part and the third-stage RO + seawater desalination membrane treatment part are connected through a pipeline;
the first-stage physicochemical treatment part comprises a heavy metal wastewater collection tank, the heavy metal wastewater collection tank is connected with a reaction tank through a lifting pump, the reaction tank is connected with an intermediate tank through an inclined plate sedimentation tank, the intermediate tank is connected with an air floatation slag remover through the lifting pump, and the air floatation slag remover is connected with a multi-media filter;
the second-stage UF ultrafiltration membrane treatment part comprises an UF ultrafiltration unit, the multi-media filter is connected with the UF ultrafiltration unit, and the UF ultrafiltration unit is connected with a heavy metal wastewater collection tank through a pipeline;
the third-stage RO + seawater desalination membrane treatment part comprises an RO unit and a seawater desalination membrane, the UF ultrafiltration unit is connected with the seawater desalination membrane through the RO unit, and the seawater desalination membrane is connected with a recycled clean water tank.
According to the description, the heavy metal wastewater can be treated into the reuse water through the synergistic effect of the first-stage materialized treatment part, the second-stage UF ultrafiltration membrane treatment part and the third-stage RO + seawater desalination membrane treatment part, the seawater desalination membrane can treat the salt in the wastewater, and the reuse water can reach the standard of pure water.
As a further scheme of the invention, impurities in the middle inclined plate sedimentation tank and the air flotation deslagging machine flow to a comprehensive sludge tank through pipelines, the comprehensive sludge tank is connected with a high-pressure membrane filter press, and filtrate in the high-pressure membrane filter press flows back to a heavy metal wastewater collection tank;
the RO unit and the seawater desalination membrane are respectively connected with an ultimate concentrated water tank, the ultimate concentrated water tank is connected with a DTRO system through a lift pump, the DTRO system is connected with an evaporator, and concentrated water in the evaporator flows to the RO unit through an ozone catalytic oxidation unit.
According to the description, concentrated water of the RO unit and the seawater desalination membrane is conveyed to the DTRO system through the lifting pump, and the DTRO system has the advantages of large flux, high inlet pressure, strong pressure resistance, long-term stable operation of equipment and the like, can improve the salt content in wastewater, and effectively reduce the salt content of reuse water.
As the technical scheme is adopted, the invention has the advantages and positive effects that:
1. the treatment method has excellent treatment effect on heavy metal wastewater, the reuse water can reach the standard of pure water, and the requirement of various workshop production water is completely met;
2. the quality of the reuse water is greatly improved, the water yield of the reuse water can reach 98 percent, and the requirements of various workshop production water are completely met; the pollution of the waste water to the environment is reduced.
Drawings
FIG. 1 is a flow chart of a method for treating heavy metal wastewater according to the present invention.
FIG. 2 is a schematic structural view of a heavy metal wastewater treatment apparatus according to the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
Example 1
As shown in figures 1 and 2, the method for treating heavy metal wastewater comprises the following specific steps:
collecting and mixing heavy metal wastewater, adding a heavy supplement agent with the concentration of 30 percent and the adding amount of 5 percent of the weight of the wastewater into a reaction tank, adding PAC with the adding amount of 8 percent of the weight of the wastewater and PAM with the adding amount of 0.3 percent of the weight of the wastewater after removing heavy metals to increase the flocculation effect, generating large-particle alum flocs, and separating mud from water under the action of gravity of a sedimentation tank; the supernatant enters an air floatation slag remover; removing the suspended matter in the supernatant; in the air floatation slag remover of the sedimentation tank machine, the generated sludge is transported outside after being subjected to filter pressing by a high-efficiency diaphragm filter press; the effluent is filtered by a multi-medium active carbon filter and a UF membrane, so that impurities in the water are deeply removed, and the follow-up process is guaranteed; the effluent enters a two-stage RO + seawater desalination membrane system for desalination and concentration, and the produced water reaches the standard of pure water and completely meets the water consumption of various workshops; the concentrated water enters a DTRO system for further concentration to improve the salt content of the concentrated water; the evaporation capacity is reduced, the distilled water is evaporated by an evaporator, the distilled water is oxidized by an ozone system to remove partial COD and then returns to a two-stage RO + seawater desalination membrane system to produce water for recycling, and the evaporation concentrated solution is separated by a centrifugal machine to obtain solid crystal salt and is transported outside.
Wherein the pore diameter of the UF ultrafiltration membrane is 0.03 mu m, the flux is 50L/square meter and hr, and the material is PVDF; the pore diameter of the RO membrane is 1nm, and the material is a polyamide membrane compound; the seawater desalination membrane has the filtration precision of 1nm and is made of a polyamide modified composite membrane.
Table 1 shows the data of example 1 after heavy metal wastewater treatment
Example 2
As shown in figure 1, the method for treating heavy metal wastewater comprises the following specific steps:
collecting and mixing heavy metal wastewater, adding a heavy supplement agent with the concentration of 30 percent and the adding amount of 8 percent of the weight of the wastewater into a reaction tank, adding PAC with the adding amount of 10 percent of the weight of the wastewater and PAM with the adding amount of 0.5 percent of the weight of the wastewater after removing heavy metals to increase the flocculation effect, generating large-particle alum flocs, and separating mud from water under the action of gravity of a sedimentation tank; the supernatant enters an air floatation slag remover; removing the suspended matter in the supernatant; in the air flotation slag remover of the sedimentation tank machine, the generated sludge is transported outside after being subjected to filter pressing by a high-efficiency diaphragm filter press; the effluent is filtered by a multi-media active carbon filter and a UF membrane, so that impurities in the water are deeply removed, and a guarantee is provided for subsequent processes; the effluent enters a two-stage RO + seawater desalination membrane system for desalination and concentration, and the produced water reaches the standard of pure water and completely meets the water consumption of various workshops; the concentrated water enters a DTRO system for further concentration to improve the salt content of the concentrated water; reducing the evaporation capacity, evaporating by an evaporator, oxidizing distilled water by an ozone system to remove part of COD, returning to a two-stage RO + seawater desalination membrane system to produce water for recycling, and separating solid crystal salt from the evaporation concentrated solution by a centrifugal machine for outward transportation.
Wherein the pore diameter of the UF ultrafiltration membrane is 0.03 mu m, the flux is 80L/square meter and hr, and the material is PVDF; the aperture of the RO membrane is 1.5nm, and the material is a polyamide membrane compound; the seawater desalination membrane has a filtration precision of 1nm and is made of a polyamide modified composite membrane.
Table 2 shows the data of example 2 after treatment of the heavy metal wastewater
Example 3
As shown in figure 1, the method for treating heavy metal wastewater comprises the following specific steps:
collecting and mixing heavy metal wastewater, adding a heavy supplement agent with the concentration of 30 percent and the dosage of 10 percent of the weight of the wastewater into a reaction tank, adding PAC with the dosage of 12 percent of the weight of the wastewater and PAM with the dosage of 0.5 percent of the weight of the wastewater after removing heavy metals to increase the flocculation effect, generating large-particle alum flocs, and separating sludge and water under the action of gravity of a sedimentation tank; the supernatant enters an air floatation slag remover; removing the suspended matter in the supernatant; in the air flotation slag remover of the sedimentation tank machine, the generated sludge is transported outside after being subjected to filter pressing by a high-efficiency diaphragm filter press; the effluent is filtered by a multi-medium active carbon filter and a UF membrane, so that impurities in the water are deeply removed, and the follow-up process is guaranteed; the effluent enters a two-stage RO + seawater desalination membrane system for desalination and concentration, and the produced water reaches the standard of pure water and completely meets the water consumption of various workshops; the concentrated water enters a DTRO system for further concentration to improve the salt content of the concentrated water; the evaporation capacity is reduced, the distilled water is evaporated by an evaporator, the distilled water is oxidized by an ozone system to remove partial COD and then returns to a two-stage RO + seawater desalination membrane system to produce water for recycling, and the evaporation concentrated solution is separated by a centrifugal machine to obtain solid crystal salt and is transported outside.
Wherein the pore diameter of the UF ultrafiltration membrane is 0.03 mu m, the flux is 120L/square meter and hr, and the material is PVDF; the aperture of the RO membrane is 2nm, and the material is a polyamide membrane compound; the seawater desalination membrane has a filtration precision of 1nm and is made of a polyamide modified composite membrane.
Table 3 shows the data of example 3 after the heavy metal wastewater treatment
Table 4 is a comparison of the data for examples 1-3 which achieve the index of pure water
As can be seen from tables 1-4, the method and the process greatly improve the quality of the reuse water, the conductivity of the reuse water is less than or equal to 10 mu s/cm, the reuse rate is 100%, the removal rate of heavy metals is 100%, and the requirements of various workshop production water are completely met; the pollution of the waste water to the environment is reduced.
Although specific embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are merely examples and that many variations or modifications may be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims.
Claims (8)
1. A treatment method of heavy metal wastewater is characterized by comprising the following steps: the treatment method sequentially comprises a first-stage materialization treatment, a second-stage UF ultrafiltration membrane treatment and a third-stage RO + seawater desalination membrane treatment;
the first-stage materialization treatment comprises the following specific steps:
collecting and mixing heavy metal wastewater, feeding the heavy metal wastewater into a collecting tank, and feeding the heavy metal wastewater into a reaction tank;
sequentially adding a heavy metal capture agent, PAC and PAM into a reaction tank;
thirdly, separating mud from water under the gravity action of a sedimentation tank;
step four, the supernatant enters an air floatation slag remover, and suspended matters in the supernatant are removed; sludge generated by the sedimentation tank and the air floatation slag remover is subjected to filter pressing by a high-pressure diaphragm filter press together, and then the sludge is transported outwards;
the second stage UF ultrafiltration membrane treatment comprises the following specific steps: the effluent is filtered by a multi-medium, an active carbon filter and a UF membrane;
the third-stage RO + seawater desalination membrane treatment comprises the following specific steps: and the effluent enters a two-stage RO + seawater desalination membrane system for desalination and concentration.
2. The method for treating heavy metal wastewater according to claim 1, wherein the method comprises the following steps: the treatment method also comprises DTRO concentrated water treatment after the third-stage RO + seawater desalination membrane treatment, and the DTRO concentrated water treatment comprises the following specific steps:
s1, enabling concentrated water to enter a DTRO system for further concentration to improve the salt content of the concentrated water;
and S2, reducing the evaporation capacity, evaporating by an evaporator, oxidizing the distilled water by an ozone system to remove part of COD, returning the distilled water to a two-stage RO + seawater desalination membrane system to produce water for recycling, and separating solid crystal salt from the evaporated concentrated solution by a centrifugal machine for outward transportation.
3. The method for treating heavy metal wastewater according to claim 1, wherein the method comprises the following steps: in the second step, the catching agent is a heavy complement agent with the concentration of 30 percent, and the adding amount is 5 to 10 percent of the weight of the wastewater; the adding amount of PAC is 8-12% of the weight of the wastewater; the dosage of PAM is 0.3-0.5% of the weight of the waste water.
4. The method for treating heavy metal wastewater according to claim 1, wherein the method comprises the following steps: the UF ultrafiltration membrane has the pore diameter of 0.03 mu m, the flux of 50-120L/square meter and hr, and is made of PVDF.
5. The method for treating heavy metal wastewater according to claim 1, wherein the method comprises the following steps: the aperture of the RO membrane is less than 2nm, and the material is a polyamide film compound.
6. The method for treating heavy metal wastewater according to claim 1, wherein the method comprises the following steps: the seawater desalination membrane has the filtration precision of 1nm and is made of a polyamide modified composite membrane.
7. The utility model provides a treatment facility of heavy metal waste water which characterized in that: the treatment equipment comprises a first-stage materialization treatment part, a second-stage UF ultrafiltration membrane treatment part and a third-stage RO + seawater desalination membrane treatment part, wherein the first-stage materialization treatment part, the second-stage UF ultrafiltration membrane treatment part and the third-stage RO + seawater desalination membrane treatment part are connected through pipelines;
the first-stage physicochemical treatment part comprises a heavy metal wastewater collection tank (1), the heavy metal wastewater collection tank (1) is connected with a reaction tank (3) through a lifting pump (2), the reaction tank (3) is connected with an intermediate tank (5) through an inclined plate sedimentation tank (4), the intermediate tank (5) is connected with an air floatation slag remover (6) through the lifting pump (2), and the air floatation slag remover (6) is connected with a multi-media filter (7);
the second-stage UF ultrafiltration membrane treatment part comprises an UF ultrafiltration unit (8), the multi-media filter (7) is connected with the UF ultrafiltration unit (8), and the UF ultrafiltration unit (8) is connected with the heavy metal wastewater collection tank (1) through a pipeline;
the third-stage RO + seawater desalination membrane treatment part comprises an RO unit (9) and a seawater desalination membrane (10), the UF ultrafiltration unit (8) is connected with the seawater desalination membrane (10) through the RO unit (9), and the seawater desalination membrane (10) is connected with a recycling clean water tank (13).
8. The heavy metal wastewater treatment equipment according to claim 7, wherein: impurities in the inclined plate sedimentation tank (4) and the air floatation slag remover (6) flow to a comprehensive sludge tank (16) through a pipeline, the comprehensive sludge tank (16) is connected with a high-pressure membrane filter press (17), and filtrate in the high-pressure membrane filter press (17) flows back to the heavy metal wastewater collection tank (1);
RO unit (9) and seawater desalination membrane (10) are connected with ultimate concentrate pond (11) respectively, ultimate concentrate pond (11) are connected with DTRO system (12) through elevator pump (2), DTRO system (12) are connected with evaporimeter (14), dense water in evaporimeter (14) flows to RO unit (9) through ozone catalytic oxidation unit (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211201268.2A CN115465998A (en) | 2022-09-29 | 2022-09-29 | Heavy metal wastewater treatment method and treatment equipment thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211201268.2A CN115465998A (en) | 2022-09-29 | 2022-09-29 | Heavy metal wastewater treatment method and treatment equipment thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115465998A true CN115465998A (en) | 2022-12-13 |
Family
ID=84334530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211201268.2A Pending CN115465998A (en) | 2022-09-29 | 2022-09-29 | Heavy metal wastewater treatment method and treatment equipment thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115465998A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205953754U (en) * | 2016-08-24 | 2017-02-15 | 南京格洛特环境工程股份有限公司 | Device of organic matter among processing heavy metal wastewater |
| CN107265793A (en) * | 2017-08-16 | 2017-10-20 | 揭阳市表面处理生态工业园有限公司 | A kind of new plating garden wastewater zero discharge processing unit and technique |
| CN107445406A (en) * | 2017-09-07 | 2017-12-08 | 浩蓝环保股份有限公司 | A kind of spinning printing and dyeing waste water reclamation processing method and processing system |
| CN207498206U (en) * | 2017-08-16 | 2018-06-15 | 揭阳市表面处理生态工业园有限公司 | A kind of electroplating wastewater zero processing system |
| CN110526476A (en) * | 2019-09-25 | 2019-12-03 | 北京华电利源科技有限公司 | The method for handling comprehensive heavy metal wastewater thereby |
| CN112062341A (en) * | 2020-09-08 | 2020-12-11 | 江苏众志新禹环境科技有限公司 | Comprehensive treatment method of heavy metal wastewater |
-
2022
- 2022-09-29 CN CN202211201268.2A patent/CN115465998A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205953754U (en) * | 2016-08-24 | 2017-02-15 | 南京格洛特环境工程股份有限公司 | Device of organic matter among processing heavy metal wastewater |
| CN107265793A (en) * | 2017-08-16 | 2017-10-20 | 揭阳市表面处理生态工业园有限公司 | A kind of new plating garden wastewater zero discharge processing unit and technique |
| CN207498206U (en) * | 2017-08-16 | 2018-06-15 | 揭阳市表面处理生态工业园有限公司 | A kind of electroplating wastewater zero processing system |
| CN107445406A (en) * | 2017-09-07 | 2017-12-08 | 浩蓝环保股份有限公司 | A kind of spinning printing and dyeing waste water reclamation processing method and processing system |
| CN110526476A (en) * | 2019-09-25 | 2019-12-03 | 北京华电利源科技有限公司 | The method for handling comprehensive heavy metal wastewater thereby |
| CN112062341A (en) * | 2020-09-08 | 2020-12-11 | 江苏众志新禹环境科技有限公司 | Comprehensive treatment method of heavy metal wastewater |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100450592C (en) | Metal smelting factory sewage reclaiming method based on membrane filtering technique | |
| CN100336746C (en) | Method of preparing pure water using metallurgic sewage | |
| CN107235601B (en) | Comprehensive electroplating wastewater treatment method, treatment system and application | |
| CN103288309A (en) | Coal gasification wastewater zero-emission treatment method, treatment system and application thereof | |
| CN109264939A (en) | The processing method and system of Lithium Battery Industry production waste water | |
| CN102976511A (en) | Coking wastewater membrane filtration concentrate recycle method | |
| CN110183018A (en) | A kind of shunt electroplating sewerage Zero discharge treatment method | |
| CN105540932A (en) | PCB waste water treatment process | |
| CN201610402U (en) | Recycling and deep treatment device for electronic electroplating wastewater | |
| CN113929242A (en) | Aluminum profile anodic oxidation wastewater treatment process | |
| CN107572732B (en) | Sewage treatment system for hazardous waste treatment plant | |
| CN111995145A (en) | Heavy metal-containing waste liquid treatment method and system | |
| CN209974485U (en) | Wastewater treatment system | |
| CN109809615A (en) | A kind of PCB waste water treatment process | |
| CN211394158U (en) | Electroplating effluent zero release sewage treatment plant | |
| CN115465998A (en) | Heavy metal wastewater treatment method and treatment equipment thereof | |
| CN215559636U (en) | Wastewater treatment system | |
| CN212924700U (en) | Recycling process system for treating nitrogen and phosphorus-containing wastewater | |
| CN212581636U (en) | Improve effluent disposal system of electroplating park water yield | |
| CN212025096U (en) | Wastewater treatment system | |
| CN210367323U (en) | High concentration industry organic waste water zero release processing system | |
| KR100313670B1 (en) | Treatment of the steel-can waste water | |
| CN210505916U (en) | Shunting electroplating sewage zero discharge treatment device | |
| CN217418382U (en) | Leachate treatment equipment | |
| CN217418451U (en) | Lithium battery slurry recycling wastewater treatment device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |