CN219730716U - RO dense water treatment device - Google Patents
RO dense water treatment device Download PDFInfo
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- CN219730716U CN219730716U CN202320740352.5U CN202320740352U CN219730716U CN 219730716 U CN219730716 U CN 219730716U CN 202320740352 U CN202320740352 U CN 202320740352U CN 219730716 U CN219730716 U CN 219730716U
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- concentrated water
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 87
- 239000002351 wastewater Substances 0.000 claims abstract description 60
- 238000005342 ion exchange Methods 0.000 claims abstract description 34
- 238000001914 filtration Methods 0.000 claims abstract description 31
- 239000010802 sludge Substances 0.000 claims abstract description 30
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 20
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000001556 precipitation Methods 0.000 claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims abstract description 14
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 10
- 239000006228 supernatant Substances 0.000 claims abstract description 10
- 238000005842 biochemical reaction Methods 0.000 claims abstract description 9
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 238000004064 recycling Methods 0.000 claims abstract description 5
- 230000015271 coagulation Effects 0.000 claims description 18
- 238000005345 coagulation Methods 0.000 claims description 18
- 230000020477 pH reduction Effects 0.000 claims description 15
- 238000005273 aeration Methods 0.000 claims description 14
- 239000012528 membrane Substances 0.000 claims description 11
- 230000007246 mechanism Effects 0.000 claims description 10
- 238000004062 sedimentation Methods 0.000 claims description 10
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 claims description 8
- 230000003301 hydrolyzing effect Effects 0.000 claims description 8
- 239000003456 ion exchange resin Substances 0.000 claims description 8
- 229920003303 ion-exchange polymer Polymers 0.000 claims description 8
- 150000002500 ions Chemical class 0.000 claims description 6
- 230000003750 conditioning effect Effects 0.000 claims description 5
- NBZBKCUXIYYUSX-UHFFFAOYSA-N iminodiacetic acid Chemical compound OC(=O)CNCC(O)=O NBZBKCUXIYYUSX-UHFFFAOYSA-N 0.000 claims description 5
- 238000011001 backwashing Methods 0.000 claims description 3
- 229920001429 chelating resin Polymers 0.000 claims description 3
- 239000012141 concentrate Substances 0.000 claims 8
- 238000013019 agitation Methods 0.000 claims 1
- 239000013049 sediment Substances 0.000 claims 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract description 60
- 229910001453 nickel ion Inorganic materials 0.000 abstract description 12
- 229910001432 tin ion Inorganic materials 0.000 abstract description 9
- 238000004065 wastewater treatment Methods 0.000 abstract description 6
- 229910052759 nickel Inorganic materials 0.000 description 21
- 208000028659 discharge Diseases 0.000 description 15
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 14
- 229910021645 metal ion Inorganic materials 0.000 description 8
- 230000007062 hydrolysis Effects 0.000 description 7
- 238000006460 hydrolysis reaction Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000009713 electroplating Methods 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 6
- 230000001112 coagulating effect Effects 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 4
- 238000010992 reflux Methods 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- VEQPNABPJHWNSG-UHFFFAOYSA-N Nickel(2+) Chemical compound [Ni+2] VEQPNABPJHWNSG-UHFFFAOYSA-N 0.000 description 3
- 239000008139 complexing agent Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- KWSLGOVYXMQPPX-UHFFFAOYSA-N 5-[3-(trifluoromethyl)phenyl]-2h-tetrazole Chemical compound FC(F)(F)C1=CC=CC(C2=NNN=N2)=C1 KWSLGOVYXMQPPX-UHFFFAOYSA-N 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000013522 chelant Substances 0.000 description 2
- 238000010668 complexation reaction Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000007269 microbial metabolism Effects 0.000 description 2
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 description 2
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 description 2
- 238000010979 pH adjustment Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 229910001379 sodium hypophosphite Inorganic materials 0.000 description 2
- -1 tin metals Chemical class 0.000 description 2
- 239000003403 water pollutant Substances 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002816 nickel compounds Chemical class 0.000 description 1
- CLDVQCMGOSGNIW-UHFFFAOYSA-N nickel tin Chemical compound [Ni].[Sn] CLDVQCMGOSGNIW-UHFFFAOYSA-N 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
The utility model discloses an RO concentrated water treatment device, and relates to the technical field of wastewater treatment. A waste water for handling after the production is equipped with: the RO system is used for preliminarily filtering the wastewater to generate RO concentrated water; the ion exchange device is used for carrying out ion exchange on the RO concentrated water; the adjusting device is used for adjusting the pH value of the solution; the precipitation device is used for performing biochemical reaction after adjusting the pH value so as to remove ammonia nitrogen, total nitrogen and COD pollution in the RO concentrated water; and the filtering device is used for recycling the sludge after the reaction and collecting supernatant. The treatment device further realizes the treatment of heavy metal nickel and tin ions and the discharge of sludge and clear water, so that the discharged supernatant or clear water meets the corresponding national standard or industry standard, and the discharge reaches the standard.
Description
Technical Field
The utility model relates to the technical field of wastewater treatment, in particular to an RO concentrated water treatment device.
Background
In the process of producing chemical nickel plating for an electroplated circuit board, substances such as nickel sulfate, complexing agent, sodium hypophosphite and the like exist in a common plating solution, wherein the nickel sulfate is a main chemical raw material of the electroplated nickel, the complexing agent is combined with nickel ions to prevent the nickel ions from being reduced, and the sodium hypophosphite provides electrons required by the reduction of the nickel ions during the chemical plating. Therefore, in the electroplating chemical nickel wastewater, phosphorus and nickel compound pollutants, complexing agents, complexes and other pollutants mainly exist. Nickel is a kind of cancerogenic toxic heavy metal, and direct discharge can cause serious influence on environment.
The electroplating wastewater can be recycled in the electroplating wastewater treatment, the reuse water technology generally adopts an RO system, the water produced by the RO system can be recycled by an electroplating enterprise, but the concentrated water produced by the RO system cannot be recycled and is discharged after reaching the standard after being treated. The common RO system is concentrated and contains higher nickel and tin metals, and meanwhile, COD, total nitrogen, ammonia nitrogen and the like can be correspondingly concentrated and cannot be directly discharged.
Disclosure of Invention
The utility model discloses an RO concentrated water treatment device which is used for solving the problem that the conventional RO filtration system cannot reach the discharge standard.
The utility model provides the following solutions:
an RO dense water treatment device for the treatment of post-production wastewater is provided with:
the RO system is used for preliminarily filtering the production wastewater;
the ion exchange device is used for carrying out ion exchange treatment on the wastewater;
the adjusting device is used for adjusting the pH value of the solution;
the precipitation device is used for performing biochemical reaction after adjusting the pH value so as to remove ammonia nitrogen, total nitrogen and COD pollution in the wastewater;
and the filtering device is used for recycling the sludge after the reaction and collecting supernatant.
Preferably, a lift pump is provided for controlling the flow direction of the wastewater.
Preferably, the concentrated water filtered by the RO system is transferred to an ion exchange device comprising an ion exchange resin by a lift pump.
Preferably, the ion exchange resin comprises iminodiacetic acid chelating resin.
Preferably, the device further comprises an aeration device, wherein the lifting pump is connected with one side of the aeration device and used for carrying out aeration stirring on the concentrated water, and the other side of the aeration device is connected with the ion exchange device.
Preferably, the conditioning device comprises a coagulation basin for completing the coagulation reaction of the wastewater to produce a coagulated precipitate.
Preferably, the conditioning device comprises a dewatering device for dewatering the precipitate
Preferably, the precipitation device comprises a hydrolytic acidification device for carrying out a hydrolytic acidification reaction of the wastewater.
Preferably, the precipitation device comprises an anoxic tank and an aerobic tank for performing biochemical reactions in aerobic and anaerobic environments, respectively.
Preferably, the filtration device comprises an MBR mechanism comprising:
a water producing pool for filtering;
an MBR filter membrane for filtering residual heavy metal ions,
the suction mechanism is used for extracting the treated wastewater to an MBR filtering membrane for filtering and then entering the water producing pool;
and the backwashing mechanism is used for reversely pumping the liquid in the water producing tank to one side of the MBR filtering membrane so as to clean the blocked sludge.
The technical scheme of the utility model has the following beneficial effects:
1) Compared with the existing RO filtration system, the utility model carries out ion complexation reaction through an ion exchange device, removes 95 to 99 percent of nickel and tin metal ions in ion exchange, then carries out pH value adjustment through an adjusting device, and then comprises the following steps according to a precipitation device: applying PAC and PAM on a precipitation device to realize coagulating sedimentation; and other sedimentation procedures, the recycling of the sedimented sludge and the discharge treatment of the supernatant are realized through the last filtering device, and the treatment device further realizes the treatment of heavy metal nickel and tin ions and the discharge of the sludge and clear water, so that the discharged supernatant or clear water meets the corresponding national standard or industry standard, and the discharge reaching the standard is realized.
2) The biochemical reaction has higher sludge concentration and less residual sludge discharge, ensures that the quality of the effluent reaches the standard stably, and simultaneously has strong impact load resistance and stable quality of the effluent, and the method has good treatment effect on nickel-containing wastewater treatment.
Drawings
Fig. 1 is a schematic view of a partial structure of the present utility model.
Fig. 2 is a schematic view of a partial structure of the present utility model.
Fig. 3 is a schematic structural view of the present utility model.
In the figure, RO system 100, ion exchange unit 200, conditioning unit 300, and filtration unit 400.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; the mechanical connection can be welding, riveting, threaded connection or flange connection, etc.; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Embodiment one:
the utility model will be described in detail with reference to figures 1-3,
an RO dense water treatment device for the treatment of post-production wastewater is provided with:
an RO system 100 for preliminarily filtering the production wastewater;
an ion exchange device 200 for performing ion exchange treatment on the wastewater;
the adjusting device 300 is used for adjusting the pH value of the solution;
the precipitation device is used for performing biochemical reaction after adjusting the pH value so as to remove ammonia nitrogen, total nitrogen and COD pollution in the wastewater;
and a filtering device 400 for recovering the reacted sludge and collecting the supernatant.
Preferably, a lift pump is provided for controlling the flow direction of the wastewater.
Preferably, the concentrated water filtered by the RO system 100 is transferred to the ion exchange device 200 by a lift pump, and the ion exchange device 200 includes an ion exchange resin.
Preferably, the ion exchange resin comprises iminodiacetic acid chelating resin.
Preferably, the device further comprises an aeration device, wherein the lifting pump is connected with one side of the aeration device and is used for carrying out aeration stirring on the concentrated water, and the other side of the aeration device is connected with the ion exchange device 200.
Preferably, the conditioning device 300 includes a coagulation tank for completing a coagulation reaction of wastewater to produce a coagulated precipitate.
Preferably, the adjusting device 300 comprises a dewatering device for dewatering the precipitate
Preferably, the precipitation device comprises a hydrolytic acidification device for carrying out a hydrolytic acidification reaction of the wastewater.
Preferably, the precipitation device comprises an anoxic tank and an aerobic tank for performing biochemical reactions in aerobic and anaerobic environments, respectively.
Preferably, the filtering apparatus 400 includes an MBR mechanism, the MBR mechanism including:
a water producing pool for filtering;
an MBR filter membrane for filtering residual heavy metal ions,
the suction mechanism is used for extracting the treated wastewater to an MBR filtering membrane for filtering and then entering the water producing pool;
and the backwashing mechanism is used for reversely pumping the liquid in the water producing tank to one side of the MBR filtering membrane so as to clean the blocked sludge.
Based on the RO concentrated water treatment device, the RO concentrated water treatment device further comprises a RO concentrated water treatment method containing nickel and tin:
the RO concentrated water treatment device specifically comprises a concentrated water tank, an ion exchange system, an RO concentrated water regulating tank, a 1# and 2# coagulation tank, a pH regulating tank, inclined tube sedimentation, a pH callback tank, an intermediate water tank, a hydrolysis acidification tank, an anoxic tank, an aerobic tank, an MBR water producing tank and a tail end ion system.
Firstly, nickel-tin-containing RO concentrated water is discharged to an RO concentrated water tank, is transferred in the concentrated water, then is lifted by a lifting pump to enter an ion exchange system for ion exchange treatment, and removes 95% -99% of nickel and tin metal ions in the ion exchange, and the concentrated water after the ion exchange treatment enters an RO concentrated water regulating tank, and air is introduced into the RO concentrated water regulating tank to continuously stir the wastewater by aeration; the concentration of nickel and tin ions in RO concentrated water after ion exchange treatment is less than or equal to 0.1mg/L; the ion exchange resin preferably uses iminodiacetic acid chelate resin as heavy metal removing functional groups.
Secondly, the wastewater in the RO concentrated water adjusting tank is lifted to a 1# and 2# coagulation tank and a pH adjusting tank through a lifting pump; adding caustic soda flakes into a pH adjusting tank to adjust the pH of the wastewater to 9-11, and then respectively adding PAC and PAM into a 1# coagulation tank and a 2# coagulation tank to complete the coagulation reaction of the wastewater, so as to remove partial nickel and tin metal ions and partial COD in the wastewater; the wastewater subjected to the coagulation reaction contains a large amount of insoluble flocs, and the wastewater after being precipitated by the inclined tube sedimentation tank enters a pH callback and middle water tank; the pH of the wastewater at the moment is alkaline, 50% sulfuric acid is added into a pH callback pool to adjust the pH of the wastewater to 6-9, and the wastewater enters an intermediate pool; and (5) dewatering sludge generated by coagulating sedimentation.
Thirdly, the wastewater after pH adjustment is lifted to a pulse water distributor through a lifting pump, then enters a hydrolysis acidification tank through the pulse water distributor, and the hydrolysis acidification reaction of the wastewater is completed in the hydrolysis acidification, so that the biodegradability of the wastewater is improved; the residence time of the hydrolytic acidification tank is generally controlled to be 6-8h.
Further, the hydrolyzed and acidified wastewater enters an anoxic tank and an aerobic tank in a self-flowing mode, and the total nitrogen in the wastewater is removed by denitrification under the anoxic condition of the anoxic tank; converting ammonia nitrogen into nitrate in an aerobic tank and removing most ammonia nitrogen and COD in water through microbial metabolism. The pollution of ammonia nitrogen, total nitrogen, COD and the like in the wastewater is removed by the combined action of the anoxic tank and the aerobic tank, the ammonia nitrogen in the effluent of the aerobic tank is less than or equal to 8mg/L, the total nitrogen is less than or equal to 15mg/L, COD and less than or equal to 50mg/L, SS and less than or equal to 100mg/L.
Finally, the effluent of the aerobic tank enters an MBR tank, the MBR tank consists of a suction pump, an MBR backwash pump and a sludge reflux pump, the suction pump filters the treated wastewater through the MBR and then enters an MBR water producing tank, part of sludge in the MBR tank returns to the aerobic tank through the sludge reflux pump to maintain aerobic Chi Wuni, and the other part of sludge is discharged through a sludge discharge pipe, and the discharged sludge area is dehydrated. When the MBR is blocked, the MBR backwash pump pumps water in the MBR water producing tank to clean the MBR membrane. The water in the MBR pool enters the discharge metering canal in a self-retaining mode to reach the standard for discharge.
When the nickel and tin metal ion concentration of the MBR water is more than 0.1mg/L, the nickel and tin ion concentration of the MBR water producing pool water is ensured to be less than or equal to 0.1mg/L after the tail end ion exchange treatment, and the nickel and tin ion concentration is discharged up to the standard.
The technical scheme of the utility model has the following beneficial effects:
1) Compared with the existing RO filtration system, the utility model carries out ion complexation reaction by the ion exchange device 200, removes 95 to 99 percent of nickel and tin metal ions in ion exchange, then carries out pH value adjustment by the adjusting device 300, and then comprises the following steps according to the precipitation device: applying PAC and PAM on a precipitation device to realize coagulating sedimentation; and other precipitation procedures, the last filtering device 400 is used for recycling the precipitated sludge and discharging the supernatant, and in the treatment process, the treatment of heavy metal nickel and tin ions and the discharge of sludge and clear water are further realized, so that the discharged supernatant or clear water meets the corresponding national standard or industry standard, and the discharge reaching the standard is realized.
2) The biochemical reaction has higher sludge concentration and less residual sludge discharge, ensures that the quality of the effluent reaches the standard stably, and simultaneously has strong impact load resistance and stable quality of the effluent, and the method has good treatment effect on nickel-containing wastewater treatment.
Example two
Based on the RO concentrated water treatment device according to the first embodiment, the utility model further provides a specific RO wastewater treatment method:
RO concentrated water quality, COD: less than or equal to 400mg/l, nickel: less than or equal to 40mg/l, tin: less than or equal to 40mg/l, ammonia nitrogen: less than or equal to 80mg/l and pH value of 3-5.
Step 1: the RO concentrated water containing nickel and tin is discharged to an RO concentrated water tank, is transferred in the concentrated water, then is lifted by a lifting pump to enter an ion exchange system for ion exchange treatment, and removes 95% -99% of nickel and tin metal ions in the ion exchange, and the concentrated water after the ion exchange treatment enters an RO concentrated water regulating tank, and air is introduced into the RO concentrated water regulating tank to continuously stir the wastewater by aeration; the concentration of nickel and tin ions in RO concentrated water after ion exchange treatment is less than or equal to 0.1mg/L; the ion exchange resin preferably uses iminodiacetic acid chelate resin as heavy metal removing functional groups.
After ion exchange treatment: COD: less than or equal to 400mg/l, nickel: less than or equal to 0.1mg/l, tin: less than or equal to 0.08mg/l, ammonia nitrogen: less than or equal to 80mg/l and pH of 6-9.
Step 2, the wastewater in the RO concentrated water adjusting tank is lifted to a 1# and 2# coagulation tank and a pH adjusting tank through a lifting pump; adding caustic soda flakes into a pH adjusting tank to adjust the pH of the wastewater to 9-11, and then respectively adding PAC and PAM into a 1# coagulation tank and a 2# coagulation tank to complete the coagulation reaction of the wastewater, so as to remove partial nickel and tin metal ions and partial COD in the wastewater; the wastewater subjected to the coagulation reaction contains a large amount of insoluble flocs, and the wastewater after being precipitated by the inclined tube sedimentation tank enters a pH callback and middle water tank; the pH of the wastewater at the moment is alkaline, 50% sulfuric acid is added into a pH callback pool to adjust the pH of the wastewater to 6-9, and the wastewater enters an intermediate pool; and (5) dewatering sludge generated by coagulating sedimentation.
After coagulating sedimentation treatment: COD: less than or equal to 360mg/l, nickel: less than or equal to 0.1mg/l, tin: less than or equal to 0.08mg/l, ammonia nitrogen: less than or equal to 72mg/l and pH of 9-11.
Step 3, the wastewater after pH adjustment is lifted to a pulse water distributor through a lifting pump, then enters a hydrolysis acidification tank through the pulse water distributor, and the hydrolysis acidification reaction of the wastewater is completed in the hydrolysis acidification, so that the biodegradability of the wastewater is improved; the residence time of the hydrolytic acidification tank is generally controlled to be 6-8h.
Step 4, further, the hydrolyzed and acidified wastewater enters an anoxic tank and an aerobic tank in a self-flowing mode, and the total nitrogen in the wastewater is removed by denitrification under the anoxic condition of the anoxic tank; converting ammonia nitrogen into nitrate in an aerobic tank and removing most ammonia nitrogen and COD in water through microbial metabolism. And removing ammonia nitrogen, total nitrogen, COD and other pollution in the wastewater by the combined action of the anoxic tank and the aerobic tank.
And 5, enabling the effluent of the aerobic tank to enter an MBR tank, wherein the MBR tank consists of a suction pump, an MBR backwash pump and a sludge reflux pump, the suction pump filters the treated wastewater through the MBR and then enters an MBR water producing tank, one part of sludge in the MBR tank returns to the aerobic tank through the sludge reflux pump to maintain aerobic Chi Wuni, and the other part of sludge is discharged through a sludge discharge pipe, and the discharged sludge area is dehydrated. When the MBR is blocked, the MBR backwash pump pumps water in the MBR water producing tank to clean the MBR membrane. The water in the MBR pool enters the discharge metering canal in a self-retaining mode to reach the standard for discharge.
And 6, when the nickel and tin metal ion concentration of the MBR water is more than 0.1mg/L, the nickel and tin ion concentration of the MBR water producing pool water is ensured to be less than or equal to 0.1mg/L after the tail end ion exchange treatment, and the nickel and tin ion concentration is discharged up to the standard.
COD after the treatment of the steps 3, 4, 5 and 6: less than or equal to 46.8mg/l, nickel: less than or equal to 0.1mg/l, tin: less than or equal to 0.1mg/l, ammonia nitrogen: the pH is 6-9 and is less than or equal to 8mg/l, which meets the requirements of Table 3 of the discharge Standard of electroplating Water pollutants in Guangdong province.
Table 1 requirements of Table 3 of the discharge Standard of electroplating Water pollutants in Guangdong province
While the present utility model has been described in considerable detail and with particularity with respect to several described embodiments, it is not intended to be limited to any such detail or embodiments or any particular embodiment, but is to be construed as providing broad interpretation of such claims by reference to the appended claims in view of the prior art so as to effectively encompass the intended scope of the utility model. Furthermore, the foregoing description of the utility model has been presented in its embodiments contemplated by the inventors for the purpose of providing a useful description, and for the purposes of providing a non-essential modification of the utility model that may not be presently contemplated, may represent an equivalent modification of the utility model.
The present utility model is not limited to the above embodiments, but is merely preferred embodiments of the present utility model, and the present utility model should be construed as being limited to the above embodiments as long as the technical effects of the present utility model are achieved by the same means. Various modifications and variations are possible in the technical solution and/or in the embodiments within the scope of the utility model.
Claims (10)
1. An RO dense water treatment device for the waste water after handling production, its characterized in that is equipped with:
the RO system is used for preliminarily filtering the wastewater to generate RO concentrated water;
the ion exchange device is used for carrying out ion exchange on the RO concentrated water;
the adjusting device is used for adjusting the pH value of the solution;
the precipitation device is used for performing biochemical reaction after adjusting the pH value so as to remove ammonia nitrogen, total nitrogen and COD pollution in the RO concentrated water; and the filtering device is used for recycling the sludge after the reaction and collecting supernatant.
2. The RO concentrated water treatment apparatus according to claim 1, wherein a lift pump is provided for controlling the flow direction of the wastewater.
3. The RO concentrate treatment device of claim 2, wherein the concentrate filtered by the RO system is transferred to an ion exchange unit comprising an ion exchange resin by a lift pump.
4. A RO concentrate treatment device according to claim 3 in which the ion exchange resin comprises iminodiacetic acid chelating resin.
5. The RO concentrated water treatment device according to claim 2, further comprising an aeration device, wherein the lift pump is connected to one side of the aeration device for aeration agitation of the concentrated water, and the other side of the aeration device is connected to an ion exchange device.
6. An RO concentrate treatment device according to claim 2, characterized in that,
the adjusting device comprises a coagulation tank for completing the coagulation reaction of the wastewater to generate coagulation sedimentation.
7. The RO concentrate treatment device of claim 6, wherein the conditioning means comprises dewatering means for dewatering the sediment.
8. The RO concentrate treatment device of claim 1, wherein the precipitation device comprises a hydrolytic acidification device for carrying out a hydrolytic acidification of the wastewater.
9. The RO concentrate treatment device of any of claims 1-8, wherein the precipitation device comprises an anoxic tank and an aerobic tank for performing biochemical reactions in aerobic and anaerobic environments, respectively.
10. The RO concentrate treatment device of claim 9, wherein the filter means comprises an MBR mechanism comprising:
a water producing pool for filtering;
an MBR filter membrane for filtering residual heavy metal ions,
the suction mechanism is used for extracting the treated wastewater to an MBR filtering membrane for filtering and then entering the water producing pool;
and the backwashing mechanism is used for reversely extracting the supernatant in the water producing tank to one side of the MBR filtering membrane so as to clean the blocked sludge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202320740352.5U CN219730716U (en) | 2023-04-06 | 2023-04-06 | RO dense water treatment device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320740352.5U CN219730716U (en) | 2023-04-06 | 2023-04-06 | RO dense water treatment device |
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| CN219730716U true CN219730716U (en) | 2023-09-22 |
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| CN202320740352.5U Active CN219730716U (en) | 2023-04-06 | 2023-04-06 | RO dense water treatment device |
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