CN213012286U - Membrane filtration and heavy metal-containing wastewater purification system - Google Patents
Membrane filtration and heavy metal-containing wastewater purification system Download PDFInfo
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- CN213012286U CN213012286U CN202020527297.8U CN202020527297U CN213012286U CN 213012286 U CN213012286 U CN 213012286U CN 202020527297 U CN202020527297 U CN 202020527297U CN 213012286 U CN213012286 U CN 213012286U
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Abstract
The utility model relates to a sewage treatment, in particular to membrane filtration and contain heavy metal wastewater purification system, include: the microfiltration equipment is used for filtering the entering wastewater to obtain first wastewater and first concentrated water/slurry; the ultrafiltration equipment is used for filtering the first wastewater to obtain second wastewater and second concentrated water; the nanofiltration equipment is used for filtering the second wastewater to obtain third wastewater and third concentrated water; the reverse osmosis equipment is used for treating the third wastewater to obtain fourth wastewater and fourth concentrated water; and adding ion exchange resin to the first concentrated water/slurry, the second concentrated water, the third concentrated water and the fourth concentrated water, at least to the third concentrated water and the fourth concentrated water respectively. By arranging the membrane filtration and heavy metal-containing wastewater purification system, the heavy metals are treated by multi-stage filtration equipment and are attached, cleaned and recovered by combining ion exchange resin, so that the membrane filtration and heavy metal-containing wastewater purification system has higher recovery rate and reduces the purification cost.
Description
Technical Field
The utility model relates to a sewage treatment, in particular to membrane filtration and heavy metal-containing wastewater purification system.
Background
In nickel smelting, the laterite-nickel ore is smelted by a pyrogenic process or a wet process, taking the wet process as an example, the ore is sequentially leached, deironing, neutralized and precipitated, ammonia leaching, extraction, back extraction and nickel sulfate solution is obtained in the wet process, and the emission reduction of high-salinity wastewater such as the nickel sulfate solution is an important step in environmental protection. After the impurities of the nickel solution are removed, the nickel in the nickel solution needs to be precipitated, sodium carbonate is added into the precipitated nickel solution to generate nickel carbonate, and the generated nickel precipitation wastewater needs to be treated. At present, MVR evaporation and electrodialysis are generally adopted to treat the nickel precipitation wastewater, but the equipment used by an MVR evaporation system is high in height, high in temperature during operation and high in operation energy consumption, and the electrodialysis mode is low in desalination rate and cannot treat water with salt content more than 3000 mg/L.
The ion exchange resin is a functional polymer material containing ion exchange groups in a cross-linked polymer structure. The ion exchange resin is insoluble in acid, alkali solution and various organic solvents, and structurally belongs to a porous solid high molecular substance which is not dissolved or melted. Ion exchange resins can be classified into styrene, acrylic, phenol, epoxy, vinylpyridine, urea, vinyl chloride, and the like; according to the form of the resin, the resin can be classified into a gel type and a macroporous type. In addition, the ion exchange resin can be divided into seven types of strong acid, weak acid, strong base, weak base, chelation, acid-base amphipathy and redox type according to the property of the functional group contained in the ion exchange resin; it can be further divided into water treatment resin, medicinal resin, catalytic resin, decolorizing resin, analytical resin, and nuclear resin.
The ion exchange resin is insoluble in general acid and alkali solutions and many organic solvents, and can be used for desalting, separating, refining, decoloring, catalyzing and the like by the functions of exchange, selection, absorption, catalysis and the like, can be widely applied to the departments of electric power, chemical industry, metallurgy, medicine, food, nuclear industry and the like, and is mainly used for preparing soft water and pure water, treating three wastes, separating and refining medicines and the like. Since the ion exchange reaction is reversible, the ion exchange resin can be recycled by exchange and regeneration.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a membrane filtration of higher water reuse rate and contain heavy metal wastewater purification system.
In order to realize the above-mentioned purpose, the technical scheme that this application adopted is a high-efficient desalination and higher water reuse rate, simultaneously the lower membrane filtration of power consumption reaches heavy metal-containing waste water clean system, includes:
the microfiltration equipment is used for filtering the entering wastewater to obtain first wastewater and first concentrated water/slurry;
the ultrafiltration equipment is used for filtering the first wastewater to obtain second wastewater and second concentrated water;
the nanofiltration equipment is used for filtering the second wastewater to obtain third wastewater and third concentrated water;
the reverse osmosis equipment is used for treating the third wastewater to obtain fourth wastewater and fourth concentrated water;
the system for filtering and combined treating the wastewater also comprises a resin system for adding ion exchange resin to the first concentrated water/slurry, the second concentrated water, the third concentrated water and the fourth concentrated water at least.
Through setting up foretell membrane filtration and contain heavy metal wastewater purification system, handle through multistage filtration equipment, combine foretell ion exchange resin to adhere to-wash-retrieve heavy metal, utilize the characteristics that ion exchange resin can be regenerated and recycled, make this membrane filtration and contain heavy metal wastewater purification system have higher rate of recovery, still reduced purification cost.
Further, the microfiltration equipment is a filter with the filtration precision of 1 μm; the filtration accuracy here is referred to simply as the degree of filtration, i.e. the filtration efficiency in terms of particle counts in the micrometer range.
Further, the resin system is provided with a resin system input end, a resin system output end, a regeneration liquid inlet and a regeneration liquid recovery port; the input end of the resin system is connected with the output end of the post-filtration separation group;
the resin system is used for collecting concentrated water generated by filtering of the post-positioned filtering separation group and discharging the concentrated water through an output end; the resin system is used for adding ion exchange resin to adsorb nickel, cobalt or copper in concentrated water, inputting regenerated liquid into a regenerated liquid inlet, and recovering the nickel, cobalt or copper adsorbed by the resin from a regenerated liquid recovery port.
Furthermore, a regeneration liquid tank is connected to the regeneration liquid inlet, and the regeneration liquid tank is connected with the regeneration liquid recovery port through a circulating pump.
Furthermore, the input end of the resin system is connected with an oil removal device, and the oil removal device is used for treating raw water by the oil removal device to enable the content of oil in the raw water to be less than 5 ppm. The oil removing device can remove oil by adopting an oil removing tank and utilizing an adsorption method.
Furthermore, the reverse osmosis equipment comprises a first-stage reverse osmosis equipment and a second-stage reverse osmosis equipment which are sequentially connected, wherein a channel for outputting the concentrated water of the second-stage reverse osmosis equipment is connected with an inlet of the first-stage reverse osmosis equipment, and the channel for outputting the concentrated water of the first-stage reverse osmosis equipment is connected with the equipment.
Furthermore, the first-stage reverse osmosis equipment is reverse osmosis equipment with a system stable recovery rate of more than or equal to 62%; the second-stage reverse osmosis equipment is reverse osmosis equipment with a system stable recovery rate of more than or equal to 30%. The stable recovery rate of the system is 100 percent of water before treatment/water after treatment
Further, the reverse osmosis equipment is a primary reverse osmosis treatment device.
Furthermore, a heat exchanger is arranged between the output end of the microfiltration device and the input end of the ultrafiltration device.
Furthermore, a concentrated water output pipe of the ultrafiltration device is connected with the microfiltration device and is used for filtering the concentrated water generated by the ultrafiltration device.
Furthermore, the microfiltration equipment is provided with a regenerated liquid input pipe and a regenerated liquid recovery output pipe for recovering regenerated liquid, and the regenerated liquid input pipe and the regenerated liquid recovery output pipe are connected through a regenerated liquid tank.
Furthermore, the concentrated water output end of the ultrafiltration device is connected with the input end of the microfiltration device.
Further, the input end of the microfiltration device is connected with a supernatant liquid storage tank.
The present invention will be further described with reference to the accompanying drawings and the detailed description. Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description. Or may be learned by practice of the invention.
Drawings
The accompanying drawings, which form a part of the disclosure, are included to assist in understanding the disclosure, and the description provided herein and the accompanying drawings, which are related thereto, are intended to explain the disclosure, but do not constitute an undue limitation on the disclosure. In the drawings:
FIG. 1 is a schematic view for explaining an embodiment of the present membrane filtration and purification system for wastewater containing heavy metals;
the labels in the figure are: the device comprises a supernatant liquid storage tank 1, a first precision filter 2, a heat exchanger 3, an ultrafiltration membrane filter 4, a nanofiltration membrane filter 5, a reverse osmosis membrane separation treatment device 6, a first reverse osmosis treatment system 6a, a second reverse osmosis treatment system 6b, a first heavy removal tank 7, a second heavy removal tank 8, a second precision filter 9, a third precision filter 10, a third heavy removal tank 11 and a pit 12.
Detailed Description
The present invention will be described more fully with reference to the accompanying drawings. Those of ordinary skill in the art will be able to implement the invention based on these descriptions. Before the present invention is described with reference to the accompanying drawings, it is to be noted that:
the technical solutions and features provided in the present invention in each part including the following description may be combined with each other without conflict.
Moreover, the embodiments of the invention described in the following description are generally only examples of a subset of the invention, and not all examples. Therefore, all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention shall fall within the protection scope of the present invention.
With respect to the terms and units of the present invention. The term "comprises" and any variations thereof in the description and claims of this invention and the related art are intended to cover non-exclusive inclusions.
A waste water treatment method, the overall recovery rate of the method to the waste water reaches more than 30%, the method treats the high-salinity waste water such as nickel sulfate solution, the method includes the following operation steps:
s1, collecting waste water;
s2, filtering the collected wastewater to ensure that the turbidity is less than 1NTU after filtering;
s3, performing nanofiltration membrane treatment and reverse osmosis membrane separation treatment on the filtered wastewater, and adding a heavy metal trapping agent into the generated concentrated water to remove the heavy metal;
s4, filtering the wastewater after weight removal through a metal material filter element and then outputting the wastewater;
after the weight is removed, any one or more of nickel, copper and cobalt is/are combined continuously and stably to reach within 1mg/l after the weight is removed by complexing discharged concentrated water, and the PH is 6-9; the waste water is processed by a nanofiltration membrane under the pressure of 40-120 bar.
Referring to fig. 1, the specific operation adopts a membrane filtration and heavy metal-containing wastewater purification system, which comprises:
the first precision filter 2 is used for filtering the entering wastewater and enabling the turbidity of the filtered wastewater to be less than 5 NTU;
the post-filtration separation group is connected with the precision filter and mainly comprises a plurality of filter devices which are connected in series;
the heavy water removing tank is used for collecting the concentrated water generated by filtering of the post-positioned filtering separation group, and adding a heavy agent to carry out complex reaction with the concentrated water;
and the second precision filter is used for filtering the wastewater after weight removal and outputting the filtered wastewater.
The post-filtration separation group comprises an ultrafiltration membrane filter 4, a nanofiltration membrane filter 5 and a reverse osmosis membrane separation treatment device 6 which are connected in series;
and one or more concentrated water discharge channels of the ultrafiltration membrane filter 4, the nanofiltration membrane filter 5 and the reverse osmosis membrane separation treatment device 6 are connected with the de-weighting tank.
Ultrafiltration (UF) as used in the ultrafiltration membrane filter 4 is a technique for removing impurities from a liquid by the principle of mechanical sieving, which is a tangential flow and pressure driven filtration process of a fluid and separates particles by size of molecular weight because of its high and stable retention of suspended matter, colloids, bacteria and microorganisms. The pore diameter of the ultrafiltration membrane is approximately in the range of 0.002-0.1 μm. Dissolved substances and substances with a pore size smaller than that of the membrane permeate the membrane as permeate, and substances which do not permeate the membrane are slowly concentrated in the effluent. The produced water (permeate) will therefore contain water, ions and small molecular weight substances, while colloidal substances, particles, bacteria, viruses and protozoa will remove the envelope. The retention rate of the ultrafiltration membrane treatment device to escherichia coli is 99.99%, the retention rate of SS is 55-99.99%, and the retention rate of COD is 20-60% (considering the molecular weight). Ensure that the SDI of the effluent is less than 3(100 percent of time) and the turbidity of the effluent is less than 0.1 NTU.
UF is a membrane process that utilizes the "sieving" action of the membrane for separation. Under the action of static pressure difference, particles smaller than the membrane pores pass through the membrane, particles larger than the membrane pores are blocked on the surface of the membrane, particles with different sizes are separated, the filtration precision is higher than that of MF, the membrane pores are smaller, and the actual operating pressure is slightly higher than that of MF and is generally 0.1-0.5 MPa.
UF separates mainly macromolecular substances (proteins, nucleic acid polymers, starches, natural gums, enzymes, etc.), colloidal dispersions (clays, pigments, minerals, emulsion particles, microorganisms) and emulsions (greases, detergents, oil-water emulsions) from liquid-phase substances. The method of combining with proper macromolecule can separate metal ion, soluble solute and macromolecule from the water solution to reach the aim of purification and concentration.
The nanofiltration membrane is between reverse osmosis and ultrafiltration. The reverse osmosis membrane has pores smaller than 1nm, and other inorganic salts except water are difficult to permeate; the pore diameter of the ultrafiltration membrane is 10-100nm, and inorganic salt can permeate the ultrafiltration membrane. The aperture of the nanofiltration membrane applied to denitration is close to that of a reverse osmosis membrane, and the membrane has higher rejection rate on 2-valent compounds such as sodium sulfate and the like after special treatment.
The nanofiltration membrane has selective interception performance on ions, such as high interception rate of 90-99% on multivalent ions or negative ions and low interception rate of 0-55% on monovalent ions. The pretreated brine enters a membrane device after being subjected to pressure increase by a high-pressure pump. Under the high pressure state, most sulfate ions are intercepted, chloride ions and sodium ions smoothly pass through the membrane, so that monovalent sodium ions and chloride ions with a valence of-1 are separated from sulfate radicals with a valence of-2, and a penetrating fluid containing a small amount of sulfate radicals and a concentrated solution containing more sulfate radicals are obtained;
the membrane aperture of the nanofiltration membrane in the embodiment is 0.5-1.0nm, 1-valent ions (sodium ions and chloride ions) are allowed to pass through, and the nanofiltration membrane has a good interception effect on-2-valent sulfate radicals. The material is chosen from amides with aromatic structure, which allows higher operating pressures. The excellent structure of the nanofiltration membrane ensures that the repulsive force to sulfate radicals is very stable, and the stability of operation is ensured.
And the sludge discharge channels of the first precision filter 2 and the second precision filter 9 are both connected with a recovery device. The recovery device here may be an excavated pit 12.
Reverse osmosis membrane separation processing apparatus 6 is including the super reverse osmosis treatment device and the reverse osmosis treatment device that connect gradually, reverse osmosis treatment device is used for exporting the passageway of dense water and super reverse osmosis treatment device's entry linkage, and super reverse osmosis treatment device is used for exporting the passageway and the heavy jar connection that removes of dense water. The solution after nanofiltration separation enters a reverse osmosis treatment system for cyclic concentration, and simultaneously, the produced water is purified by the next stage of reverse osmosis.
A heat exchanger 3 is arranged between the output end of the first precision filter 2 and the input end of the ultrafiltration membrane filter 4. The heat exchanger 3 can adopt a heat exchange water pipe to exchange heat with a pipeline at the output end of the first precision filter 2. The input end of the first precision filter 2 is connected with a supernatant liquid storage tank 1.
The input end of the supernatant liquid storage tank 1 is connected with a concentrator for concentrating the wastewater.
And the first precision filter 2 is connected with a back-blowing device. The output ends of any one or more of the ultrafiltration membrane filter 4, the nanofiltration membrane filter 5 and the reverse osmosis membrane separation treatment device 6 are connected with a buffer water tank, and the buffer water tank is connected with the output ends of any one or more of the ultrafiltration membrane filter 4, the nanofiltration membrane filter 5 and the reverse osmosis membrane separation treatment device 6 through a backwashing water inlet pipeline.
One specific process step is as follows:
and conveying the wastewater output by the concentrator to a supernatant reservoir 1, conveying the wastewater to a first precision filter 2 for filtering by the supernatant reservoir 1, conveying the liquid filtered by the first precision filter 2 to a UF system (namely an ultrafiltration membrane filter 4) for filtering after heat exchange by a heat exchanger 3, conveying the generated concentrated water to the supernatant reservoir 1, and performing the steps again.
Conveying the water produced after filtering by the UF system to an SNF system, namely a nanofiltration membrane system, filtering, conveying the concentrated water produced by the SNF system to a first de-weighting tank 7, adding a de-weighting agent to remove the weight, and conveying the liquid after removing the weight to a second precision filter 9 for filtering; conveying the produced water of the SNF system to an SRO system, namely a first reverse osmosis treatment system 6a (a super reverse osmosis treatment device) for treatment, conveying concentrated water generated by the SRO system to a second de-weighting tank 8, adding a de-weighting agent for de-weighting, and conveying the de-weighted liquid to a second precision filter 9 (a separate third precision filter 10 can be additionally arranged) for filtration; the produced water of the SRO system is conveyed to an RO system, namely a second reverse osmosis treatment system 6b for treatment, the concentrated water generated by the RO system is conveyed to the SRO system for treatment, and the RO system outputs the produced water. The second or third fine filter 9 or 9 may be used to deliver the filtered liquid to a waste water plant or other treatment facility for treatment. The first 2, second 9 or third filters described above are all provided with a mud channel leading to the sump 12. The heavy tank is a buffer water tank, the buffer water tanks are arranged at the conveying ends of the ultrafiltration membrane filter 4, the nanofiltration membrane filter 5 and the reverse osmosis membrane separation treatment device 6, and the buffer water tanks at the conveying ends of the nanofiltration membrane filter 5 and the reverse osmosis membrane separation treatment device 6 can be used as the heavy tank.
In addition to the above process steps, there is another embodiment, different from the above embodiment, a third de-weighting tank 11 is also arranged between the supernatant fluid storage tank 1 and the first ultrafilter 2, and the concentrated water generated by the UF system is delivered to the third de-weighting tank 11, so that the concentrated water enters the de-weighting link, and the de-weighting is more reliable after two processes.
The precision filter adopts the metal filter element to filter the wastewater, is used for removing fine suspended matters or colloidal particles, ensures that the turbidity after filtration is less than 5NTU, and is used for removing the fine suspended matters or the colloidal particles. The metal filter element is a TiAl porous material metal filter element. TiAl in the lining, i.e. Titanium aluminium (Titanium aluminium)And is an intermetallic compound. Has three forms of gamma-TiAl and alpha2-Ti3Al and TiAl3. gamma-TiAl. The gamma-TiAl has excellent mechanical performance and low density of only 4.0g/cm 3. The oxidation resistance and the corrosion resistance are still strong when the temperature exceeds 600 ℃. γ -TiAl is preferably used here. Thus, the solid-liquid two phases are separated by adopting a physical method, no chemical agent is required to be added, and no impurity is introduced; the TiAl porous material metal filter element is a rigid structure, and the pores of the TiAl porous material metal filter element are more uniform and more stable than those of a cloth bag filter and a sand filter tank, so that the filtering precision is high.
And (3) performing nanofiltration membrane treatment to ensure that the stable recovery rate of the nanofiltration membrane system is more than or equal to 40%, adding a heavy metal trapping agent into the concentrated water obtained by the nanofiltration membrane treatment to remove the weight, and filtering the liquid after the weight removal by using a metal material filter element and then outputting the liquid. The stable recovery rate of the system is 100% of pure water/raw water.
And (3) performing reverse osmosis membrane separation treatment to ensure that the stable recovery rate of the system is more than or equal to 45%, adding a heavy metal trapping agent into the concentrated water obtained by nanofiltration membrane treatment to remove the weight, and filtering the liquid after weight removal by using a metal material filter element and then outputting the liquid.
In this embodiment, the water quality of each process stage is estimated as follows:
the first, second and third precision filters have stable water production turbidity less than 5NTU, and during cleaning, after the dosage cleaning, the flux of the filter element can recover more than 98%, so the surface cleaning effect is good, and the flux attenuation of the filter element is low. During the test time, the continuously operated apparatus body did not show severe corrosion.
The UF system described above, i.e., ultrafiltration membrane filters, produced water turbidity < 1 NTU. After the dosage is cleaned, the flux of the membrane element can be recovered by more than 98 percent, which shows that the cleaning effect is good. During the test time, the continuously operated apparatus body did not show severe corrosion.
The stable recovery rate of the system of the nanofiltration membrane processor of the SNF system is more than or equal to 72 percent. In the continuous operation test process, the cleaning period is more than or equal to 1 month. After the dosage is cleaned, the flux of the membrane element can be recovered to 98% of the new membrane under the same water quality, which indicates that the cleaning effect is good. In the attenuation rate test of the membrane element, a raw water test is carried out after pilot plant test continuous operation, and the interception rate of the system to various ions under the same operation pressure and the same water inlet quality is tested. The change of the interception rate of ions in water is in a reasonable range (the interception rate of each ion is attenuated by less than 5 percent before and after the experiment), and the membrane element is polluted by sewage. In the test time, the main pumps, valves, instruments and the like of the continuous operation equipment are not seriously corroded.
The stable recovery rate of the SRO system, namely the first reverse osmosis treatment system is more than or equal to 45 percent. In the continuous operation test process, the cleaning period is more than or equal to 1 month. After the dosage is cleaned, the flux of the membrane element can be recovered to 98% of the new membrane under the same water quality, which shows that the cleaning effect is good. The decay rate of the membrane element was tested. And (3) carrying out a raw water test after pilot plant test continuous operation, and testing the interception rate of the system on various ions under the same operation pressure and the same water inlet quality. The change of the interception rate of ions in water is in a reasonable range (the interception rate of each ion is attenuated by less than 5 percent before and after the experiment), and the membrane element is polluted by sewage. In the test time, the main pumps, valves, instruments and the like of the continuous operation equipment are not seriously corroded.
The contents of the present invention have been explained above. Those of ordinary skill in the art will be able to implement the invention based on these descriptions. Based on the above-mentioned contents of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.
Claims (10)
1. Membrane filtration and contain heavy metal wastewater purification system, its characterized in that includes:
the microfiltration equipment is used for filtering the entering wastewater to obtain first wastewater and first concentrated water/slurry;
the ultrafiltration equipment is used for filtering the first wastewater to obtain second wastewater and second concentrated water;
the nanofiltration equipment is used for filtering the second wastewater to obtain third wastewater and third concentrated water;
the reverse osmosis equipment is used for treating the third wastewater to obtain fourth wastewater and fourth concentrated water;
the membrane filtration and heavy metal-containing wastewater purification system further comprises a resin system which at least adds ion exchange resin to the third concentrated water and the fourth concentrated water respectively aiming at the first concentrated water/slurry, the second concentrated water, the third concentrated water and the fourth concentrated water.
2. The membrane filtration and heavy metal-containing wastewater purification system of claim 1, wherein the resin system is provided with a resin system input, a resin system output, a regeneration liquid inlet, and a regeneration liquid recovery port; the input end of the resin system is connected with the output end of the post-filtration separation group;
the resin system is used for collecting the third concentrated water or the fourth concentrated water and discharging the third concentrated water or the fourth concentrated water through the output end; the resin system is used for adding ion exchange resin to adsorb nickel, cobalt or copper in concentrated water, inputting regenerated liquid into a regenerated liquid inlet, and recovering the nickel, cobalt or copper adsorbed by the resin from a regenerated liquid recovery port.
3. The membrane filtration and purification system for wastewater containing heavy metals as claimed in claim 2, wherein the input end of the resin system is connected with a deoiling device, and the deoiling device is a deoiling device which can make the content of oil in raw water less than 5ppm after the raw water is treated by the deoiling device.
4. The membrane filtration and purification system for wastewater containing heavy metals according to claim 2, wherein the regeneration liquid inlet is connected with a regeneration liquid tank, and the regeneration liquid tank is connected with the regeneration liquid recovery port through a circulation pump.
5. The membrane filtration and purification system for wastewater containing heavy metals according to claim 1, wherein the reverse osmosis apparatus comprises a first reverse osmosis apparatus and a second reverse osmosis apparatus connected in series, the second reverse osmosis apparatus having a passage for outputting concentrated water connected to an inlet of the first reverse osmosis apparatus, and the first reverse osmosis apparatus having a passage for outputting concentrated water connected to the de-weighting apparatus.
6. The membrane filtration and purification system for wastewater containing heavy metals according to claim 5,
the first-stage reverse osmosis equipment is reverse osmosis equipment with a system stable recovery rate of more than or equal to 62%;
the second-stage reverse osmosis equipment is reverse osmosis equipment with a system stable recovery rate of more than or equal to 30%.
7. The membrane filtration and heavy metal-containing wastewater purification system of claim 1, wherein a heat exchanger is provided between the output of the microfiltration device and the input of the ultrafiltration device.
8. The membrane filtration and heavy metal-containing wastewater purification system of claim 1, wherein the input end of the microfiltration device is connected with a supernatant reservoir.
9. The membrane filtration and heavy metal-containing wastewater purification system of claim 8, wherein the input end of the supernatant reservoir is connected with a concentrator for concentrating wastewater.
10. The membrane filtration and heavy metal-containing wastewater purification system of claim 1, wherein the concentrate output of the ultrafiltration device is connected to the input of the microfiltration device.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113526727A (en) * | 2021-07-21 | 2021-10-22 | 重庆华捷地热能开发有限公司 | Concentrated filling system of natural hot spring water |
| CN114262804A (en) * | 2021-12-24 | 2022-04-01 | 四川顺应动力电池材料有限公司 | High-value comprehensive utilization method of laterite-nickel ore resources |
| CN114573176A (en) * | 2022-03-29 | 2022-06-03 | 爱环吴世（苏州）环保股份有限公司 | Treatment method for up-to-standard discharge of industrial cleaning wastewater |
-
2020
- 2020-04-08 CN CN202020527297.8U patent/CN213012286U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113526727A (en) * | 2021-07-21 | 2021-10-22 | 重庆华捷地热能开发有限公司 | Concentrated filling system of natural hot spring water |
| CN113526727B (en) * | 2021-07-21 | 2022-12-27 | 重庆华捷地热能开发有限公司 | Concentrated filling system of natural hot spring water |
| CN114262804A (en) * | 2021-12-24 | 2022-04-01 | 四川顺应动力电池材料有限公司 | High-value comprehensive utilization method of laterite-nickel ore resources |
| CN114573176A (en) * | 2022-03-29 | 2022-06-03 | 爱环吴世（苏州）环保股份有限公司 | Treatment method for up-to-standard discharge of industrial cleaning wastewater |
| CN114573176B (en) * | 2022-03-29 | 2023-10-27 | 爱环吴世（苏州）环保股份有限公司 | Treatment method for up-to-standard discharge of industrial cleaning wastewater |
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