CN205347081U - Cyanogen chemical plating cadmium waste water zero release processing system - Google Patents
Cyanogen chemical plating cadmium waste water zero release processing system Download PDFInfo
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- CN205347081U CN205347081U CN201521035463.8U CN201521035463U CN205347081U CN 205347081 U CN205347081 U CN 205347081U CN 201521035463 U CN201521035463 U CN 201521035463U CN 205347081 U CN205347081 U CN 205347081U
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- 239000002351 wastewater Substances 0.000 title claims abstract description 61
- 238000007747 plating Methods 0.000 title abstract description 12
- 239000000126 substance Substances 0.000 title abstract description 12
- 229910052793 cadmium Inorganic materials 0.000 title abstract description 8
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 title abstract description 8
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 title abstract 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 178
- 238000001728 nano-filtration Methods 0.000 claims abstract description 64
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 51
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 41
- 238000000034 method Methods 0.000 claims abstract description 37
- 238000000926 separation method Methods 0.000 claims abstract description 18
- 238000004094 preconcentration Methods 0.000 claims abstract description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000000746 purification Methods 0.000 claims abstract description 12
- NHMJUOSYSOOPDM-UHFFFAOYSA-N cadmium cyanide Chemical compound [Cd+2].N#[C-].N#[C-] NHMJUOSYSOOPDM-UHFFFAOYSA-N 0.000 claims description 64
- 239000012528 membrane Substances 0.000 claims description 32
- 238000006396 nitration reaction Methods 0.000 claims description 31
- 208000028659 discharge Diseases 0.000 claims description 24
- 238000001704 evaporation Methods 0.000 claims description 24
- 230000008020 evaporation Effects 0.000 claims description 23
- 239000004952 Polyamide Substances 0.000 claims description 18
- 239000002131 composite material Substances 0.000 claims description 18
- 229920002647 polyamide Polymers 0.000 claims description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 17
- 229910052799 carbon Inorganic materials 0.000 claims description 14
- 239000010453 quartz Substances 0.000 claims description 14
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 230000008676 import Effects 0.000 claims description 3
- 239000012141 concentrate Substances 0.000 abstract description 4
- 238000004064 recycling Methods 0.000 abstract description 4
- 239000004576 sand Substances 0.000 abstract 1
- 239000013505 freshwater Substances 0.000 description 12
- WLZRMCYVCSSEQC-UHFFFAOYSA-N cadmium(2+) Chemical compound [Cd+2] WLZRMCYVCSSEQC-UHFFFAOYSA-N 0.000 description 9
- 239000007788 liquid Substances 0.000 description 9
- 238000009713 electroplating Methods 0.000 description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000010970 precious metal Substances 0.000 description 5
- 239000012535 impurity Substances 0.000 description 4
- 239000004531 microgranule Substances 0.000 description 4
- 238000004065 wastewater treatment Methods 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 3
- 239000006004 Quartz sand Substances 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000000844 anti-bacterial effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 229920002521 macromolecule Polymers 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 239000004155 Chlorine dioxide Substances 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 235000019398 chlorine dioxide Nutrition 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model discloses a cyanogen chemical plating cadmium waste water zero release processing system, including former water tank, purification pretreatment systems, super water filter tank, circulation separation recycling system, concentrated tank, pure water case, pre -concentration system, the concentrated system of circulation and evaporative concentration groove, it includes consecutive quartzy sand filter, activated carbon filter, a precision filter and ultrafiltration device to purify pretreatment systems, the pre -concentration system includes that the 2nd consecutive precision filter and one section are received and strains the device, circulation separation recycling system includes reverse osmosis unit, the concentrated system that circulates receives including the super concentrated tank, hyperconcetration booster pump, the 3rd precision filter and the two -stage process that connect gradually and strains the device. The utility model discloses a reverse osmosis produces the pure water retrieval and utilization in floating water tank, and the dense water of reverse osmosis is received through one section and is strained the device concentration, and one section nanofiltration concentrate receives through the two -stage process and strains the device concentration that circulates, and rethread evaporative concentration is until retrieval and utilization more than 300 times in the cyanogen chemical plating cadmium system that reaches former water concentration.
Description
Technical field
This utility model belongs to field of industrial waste water treatment, relates to a kind of cyanide cadmium Wastewater zero-discharge treatment system, is specifically related to a kind of reclaim cadmium solution from cyanide cadmium poaching wastewater, realize the system of wastewater zero discharge.
Background technology
Electroplating wastewater is a kind of pollutant is also a kind of valuable resource; it is raw material that plating generally uses the metals such as gold, silver, copper, nickel, chromium; these raw metals are all be worth significantly high precious metal; if processing these electroplating wastewaters according to method of chemical treatment; substantial amounts of chemical agent would generally be needed; also producing the substantial amounts of mud containing heavy metal, environment is still had certain pollution by these mud simultaneously.Although the waste water after traditional chemical process can reach discharge standard, but a large amount of precious metal therein is also disposed off accordingly, causes the waste of these precious metals, adds company's operating cost.High for heavy metal out of electroplating wastewater composition recovery value, and deal with the characteristic that environmental hazard is serious improperly, inventor is through to the multiple processing method repetition test of electroplating wastewater and actual motion, have found the direct of a kind of less expensive from rinse bath, reclaim single precious metal ion method, realize cleaning water and metal ion fully recovering and electroplating washing water carrying out classification processing the method recycled, these methods effectively solve copper facing, nickel plating, chromium plating wastewater recycle and copper, nickel, chromium recovery problem.Cyanide cadmium waste water and electroplating wastewater character recited above have very big difference, cyanide cadmium carries out under strongly alkaline conditions, therefore in the process of membrance concentration, the pH of waste water can be varied from, this to concentration film performance can have a huge impact, at present for the technology of cyanide cadmium cycling utilization of wastewater it is not yet reported that.The method of existing cyanide cadmium wastewater treatment mainly aoxidizes the broken cyanide sedimentation method exactly, conventional oxidant has sodium hypochlorite, chlorine dioxide etc., although these oxidants to cyanide to abolish effect better, but reagent cost is high, complex process, investment and operating cost not low, and substantial amounts of mud can be produced, this also can form secondary pollution.Membrane technology is a kind of low cost, wastewater processing technology pollution-free, efficient, at present its in cyanide cadmium wastewater treatment but without relating to.
Summary of the invention
The purpose of this utility model is the chemically and physically characteristic for the problems referred to above and cyanide cadmium waste water, provide the process system of the cyanide cadmium waste water of a kind of economical and efficient, utilize specific membrane technology treatment of Cadmium Cyanide Wastewater, from cyanide cadmium waste water, reclaim cadmium plating liquid be back to coating bath, the fresh water that the system of process produces is returned production line to recycle, thus realizing the zero-emission of waste water simultaneously.
The purpose of this utility model can be reached by following measures:
A kind of cyanide cadmium Wastewater zero-discharge treatment system, this system includes raw water box 1, purification pretreatment system, ultrafiltration water tank 7, multi-cycle separation reclaiming system, concentration water tank 10, pure water tank 15, preconcentration technique, circulation concentration systems and evaporation and concentration groove 22；Described purification pretreatment system includes the quartz filter 3, active carbon filter the 4, first accurate filter 5 and ultrafiltration (UF) device 6 that are sequentially connected；Described multi-cycle separation reclaiming system includes reverse osmosis unit 9；Described preconcentration technique includes the second accurate filter 12 of being sequentially connected and one section of nanofiltration device 14；Described circulation concentration systems includes the ultra concentration water tank 17, ultra concentration booster pump the 18, the 3rd accurate filter 19 and the two-stage nitration nanofiltration device 21 that are sequentially connected with；
The outlet that the former water inlet of described raw water box 1 rinses tank 25 with cyanide cadmium is connected, the outlet of raw water box 1 is connected with the entrance purifying pretreatment system, the dense water out of the ultrafiltration apparatus 6 of described purification pretreatment system is connected with another entrance of raw water box 1, and the water outlet of ultrafiltration apparatus 6 is connected with an entrance of ultrafiltration water tank 7；The outlet of ultrafiltration water tank 7 is connected with the entrance of multi-cycle separation reclaiming system；In described multi-cycle separation reclaiming system, the water outlet of reverse osmosis unit 9 is connected with the entrance of pure water tank 15, and the outlet of described pure water tank 15 rinses tank 25 entrance with cyanide cadmium and is connected；The dense water out of reverse osmosis unit 9 is connected with an entrance of concentration water tank 10；The outlet of described concentration water tank 10 is connected with the entrance of described preconcentration technique, the water outlet of one section of nanofiltration device 14 of described preconcentration technique is connected with another entrance of ultrafiltration water tank 7, and concentrated solution outlet is connected with an entrance of the ultra concentration water tank 17 of described circulation concentration systems；The water outlet of the two-stage nitration nanofiltration device 21 of described circulation concentration systems is connected with another entrance of concentration water tank 10, and concentrated solution outlet is connected with another entrance of ultra concentration water tank 17；Being provided with branch road in the outlet of described ultra concentration booster pump 18 to be connected with the entrance of described evaporation and concentration groove 22, the outlet of described evaporation and concentration groove 22 is connected with the import of cyanide cadmium coating bath 24.
Preferably, described cyanide cadmium Wastewater zero-discharge treatment system also includes former water booster pump 2, and described former water booster pump 2 is located on the connecting line of described raw water box 1 and quartz filter 3.
Preferably, described cyanide cadmium Wastewater zero-discharge treatment system also includes the first high-pressure pump 8, and described first high-pressure pump 8 is located on the connecting line of ultrafiltration water tank 7 and reverse osmosis unit 9；Outlet at described first high-pressure pump 8 is provided with Pressure gauge.
Preferably, described cyanide cadmium Wastewater zero-discharge treatment system also includes concentration booster pump 11 and the second high-pressure pump 13, described concentration booster pump 11 is located on the export pipeline of described concentration water tank 10, and described second high-pressure pump 13 is located on the connecting line of described second accurate filter 12 and one section of nanofiltration device 14.
Preferably, described cyanide cadmium Wastewater zero-discharge treatment system also includes the 3rd high-pressure pump 20；Described 3rd high-pressure pump 20 is located on the connecting line of described 3rd accurate filter 19 and two-stage nitration nanofiltration device 21.
The pipeline connecting described ultra concentration booster pump 18 and the 3rd accurate filter 19, the branch road being connected ultra concentration booster pump 18 and evaporation and concentration groove 22 constitute parallel pipeline.Connect described ultra concentration booster pump 18 with on the pipeline of the 3rd accurate filter 19, is connected on the branch road of ultra concentration booster pump 18 and evaporation and concentration groove 22 and is respectively equipped with controls valve for controlling the flow direction of concentrated solution in ultra concentration water tank 17.
Preferably, described pure water tank 15 with the connecting line of cyanide cadmium rinsing tank 25 are additionally provided with pure water booster pump 16.The connecting line of described evaporation and concentration groove 22 and cyanide cadmium coating bath 24 is additionally provided with dope reuse booster pump 23.
The filter medium of described quartz filter 3 is quartz sand, for instance select the quartz sand of 60 orders as filter medium；The filter medium of described active carbon filter 4 is granular active carbon；The filter element aperture of described first accurate filter 5 is at about 1～10 μm, it is preferred to use the accurate filter that filter element aperture is 5 μm；Described ultrafiltration apparatus 6 adopts the ultrafilter membrane of aperture 1～20nm, it is particularly preferred to adopt the ultrafilter membrane of aperture 10nm；The filter element aperture of described second accurate filter 12 is at about 1～10 μm, it is preferred to use the accurate filter that filter element aperture is 5 μm；The filter element aperture of described 3rd accurate filter 19 is at about 1～10 μm, it is preferred to use the accurate filter that filter element aperture is 5 μm.
The reverse osmosis membrane of described reverse osmosis unit 9 adopts BW8040-400 polyamide composite film；The NF membrane of described one section of nanofiltration device 14 adopts DK8040 polyamide composite film；The NF membrane of described two-stage nitration nanofiltration device 21 adopts DK8040 polyamide composite film.
During use: the former water booster pump 2 first by 0.2～0.5MPa allows cyanide cadmium waste water pass sequentially through quartz filter 3 and active carbon filter 4, float in coarse filtration waste water, impurity, Organic substance, fine straining is carried out again with the first accurate filter 5, the purification of quartz filter 3, active carbon filter 4 and the first accurate filter 5 is to filter the harmful components such as Organic substance in waste water, impurity, float, in order to avoid these materials enter ultrafiltration apparatus 6 and cause the blocking of ultrafiltration apparatus 6, pollution and shortening in service life etc.；Water through quartz filter 3, active carbon filter 4 and the first accurate filter 5 purified treatment is directly entered ultrafiltration apparatus 6; carry out ultra-filtration filters purified treatment; ultrafilter membrane is the perforated membrane that one has super " screening " function; can effectively remove the microgranule in waste water, colloid, antibacterial and macromolecule organic matter; reduce the water quality index such as turbidity, COD, TOC, make reverse osmosis membrane obtain more reliable protection.Return in raw water box 1 through purifying the dense water of pretreated ultrafiltration, ultrafiltration fresh water enters ultrafiltration water tank 7, inject reverse osmosis unit 9 by the first high-pressure pump 8 and carry out reverse osmosis isolation, obtain pure water and reverse osmosis concentrated water, pure water enters pure water tank 15, pump into cyanide cadmium rinsing tank 25 again through pure water booster pump 16 and carry out the rinsing of plating piece, reverse osmosis concentrated water enters concentration water tank 10, water in concentration water tank 10 is through concentration booster pump 11, second accurate filter 12, second high-pressure pump 13 enters one section of nanofiltration device 14 and carries out one section of nanofiltration separation process of waste liquid, process, through one section of nanofiltration device 14, the one section of nanofiltration fresh water produced and enter ultrafiltration water tank 7 and ultrafiltration mixing of fresh water, carry out follow-up reverse-osmosis treated, the one section of nanofiltration concentrated solution produced enters ultra concentration water tank 17, the 3rd accurate filter 19 is sent into through ultra concentration supercharging 18, send into two-stage nitration nanofiltration device 21 again through the 3rd high-pressure pump 20 and carry out two-stage nitration nanofiltration separation process, respectively obtain two-stage nitration nanofiltration fresh water and two-stage nitration nanofiltration concentrated solution, gained two-stage nitration nanofiltration fresh water returns concentration water tank 10 and mixes with reverse osmosis concentrated water, again carry out waste water pre-concentration process；Gained two-stage nitration nanofiltration concentrated solution returns ultra concentration water tank 17 and mixes with the one section of nanofiltration concentrated solution processed through one section of nanofiltration device, again by the 3rd accurate filter 19 and two-stage nitration nanofiltration device 21, it is circulated concentration, until the concentration of cadmium ions of concentrated solution reaches predetermined concentration, now in concentrated solution cadmium ion content relative in former water more than 200 times of cadmium ion content, then concentrated solution is pumped into evaporation and concentration groove 22 and is evaporated concentration, make cadmium ion content in solution reach more than 300 times of cadmium ion content in former water.
Feature of the present utility model is: carried out the rinsing of plating piece by the method for countercurrent rinsing, ensure that subsequent treatment facility runs under good condition of water quality, collect cyanide cadmium waste water, then by cyanide cadmium waste water relatively low for concentration through reverse osmosis unit, the fresh water produced is back to rinsing tank, the dense water conservancy produced concentrates further by one section of nanofiltration device, re-use two-stage nitration nanofiltration system to one section of nanofiltration concentrated solution circulation concentration, finally re-use the evaporation concentration device concentrated solution to being concentrated to certain multiple and be evaporated concentration, until it reaches intended concentration.Introducing without any secondary pollution in this process, the equipment used in concentration process is the equipment that electroplating enterprise is conventional, puts into without extras and man-hour, reduces operation cost.Adopt the mode of this utility model treatment of Cadmium Cyanide Wastewater and the original cyanide cadmium wastewater treatment of electroplating industry to comparing, have the simple less investment of equipment and operation cost is low, technical process is simple, easy and simple to handle, pollute little and the concentrated solution after concentrating can be back to the features such as coating bath.
Beneficial effects of the present invention:
1, this utility model adopts polyamide composite reverse osmosis membrane to make pure water and returns to production line recycling, reverse osmosis concentrated water is concentrated by recycling polyamide composite nanofiltration membrane, concentrated solution produced by nanofiltration system adopts polyamide composite nanofiltration membrane that it is carried out further concentration, the concentrated solution relative to 200 times of concentrations above of cyanide cadmium poaching wastewater is obtained by circulating concentration, again to the further evaporation and concentration of this concentrated solution, it is possible to obtain being back to coating bath relative to the cyanide cadmium liquid of 300 times of concentrations above of cyanide cadmium poaching wastewater.
2, the more existing chemical treatment method advantage of this utility model is:
1) cost of investment is lower, this utility model up-front investment equipment, and the equipment of this system is invested less for method of chemical treatment；It addition, rinse-system needs substantial amounts of pure water to carry out the rinsing of plating piece, native system is capable of the circulation-supplied of pure water, has saved cost.
2) method of chemical treatment can produce secondary pollution, it addition, chemical method would generally produce substantial amounts of mud, processing cost increases, and native system will not produce secondary pollution, without producing mud.
3) system that this utility model provides can reclaim the plating solution in cyanide cadmium waste water effectively, cyanide cadmium Waste water concentrating is become cyanide cadmium liquid, has both saved precious metal resource, protect again environment.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of this utility model cyanide cadmium Wastewater zero-discharge treatment system.
In Fig. 1, 1-raw water box, the former water booster pump of 2-, 3-quartz filter, 4-active carbon filter, 5-the first accurate filter, 6-ultrafiltration apparatus, 7-ultrafiltration water tank, 8-the first high-pressure pump, 9-reverse osmosis unit, 10-concentrates water tank, 11-concentrates booster pump, 12-the second accurate filter, 13-the second high-pressure pump, mono-section of nanofiltration device of 14-, 15-pure water tank, 16-pure water booster pump, 17-ultra concentration water tank, 18-ultra concentration booster pump, 19-the 3rd accurate filter, 20-the 3rd high-pressure pump, 21-two-stage nitration nanofiltration device, 22-evaporation and concentration groove, 23-dope reuse booster pump, 24-cyanide cadmium groove, 25-cyanide cadmium rinsing tank.
Detailed description of the invention
Below in conjunction with accompanying drawing, the technical solution of the utility model is described further.
As shown in Figure 1, a kind of cyanide cadmium Wastewater zero-discharge treatment system, this system includes raw water box 1, purification pretreatment system, ultrafiltration water tank 7, multi-cycle separation reclaiming system, concentration water tank 10, pure water tank 15, preconcentration technique, circulation concentration systems and evaporation and concentration groove 22；Described purification pretreatment system includes the quartz filter 3, active carbon filter the 4, first accurate filter 5 and the ultrafiltration apparatus 6 that are sequentially connected；Described multi-cycle separation reclaiming system includes reverse osmosis unit 9；Described preconcentration technique includes the second accurate filter 12 of being sequentially connected and one section of nanofiltration device 14；Described circulation concentration systems includes the ultra concentration water tank 17, ultra concentration booster pump the 18, the 3rd accurate filter 19 and the two-stage nitration nanofiltration device 21 that are sequentially connected with.
The outlet that the former water inlet of described raw water box 1 rinses tank 25 with cyanide cadmium is connected, the outlet of raw water box 1 is connected with the entrance purifying pretreatment system through former water booster pump 2, the dense water out of the ultrafiltration apparatus 6 of described purification pretreatment system is connected with another entrance of raw water box 1, and the water outlet of ultrafiltration apparatus 6 is connected with an entrance of ultrafiltration water tank 7；The outlet of ultrafiltration water tank 7 is connected with the entrance of multi-cycle separation reclaiming system through the first high-pressure pump 8；In described multi-cycle separation reclaiming system, the water outlet of reverse osmosis unit 9 is connected with the entrance of pure water tank 15, and the outlet of described pure water tank 15 rinses tank 25 entrance with cyanide cadmium and is connected；The dense water out of described reverse osmosis unit 9 is connected with an entrance of concentration water tank 10；The concentrated booster pump 11 that exports of described concentration water tank 10 is connected with the entrance of described preconcentration technique, is provided with the second high-pressure pump 13 between the second accurate filter 12 and the one section of nano filter membrance device 14 in described preconcentration technique；The water outlet of one section of nanofiltration device 14 of described preconcentration technique is connected with another entrance of ultrafiltration water tank 7, and concentrated solution outlet is connected with an entrance of the ultra concentration water tank 17 of described circulation concentration systems；It is provided with the 3rd high-pressure pump 20 between the 3rd accurate filter 19 and two-stage nitration nano filter membrance device 21 in described circulation concentration systems, the water outlet of the two-stage nitration nanofiltration device 21 of described circulation concentration systems is connected with another entrance of concentration water tank 10, and concentrated solution outlet is connected with another entrance of ultra concentration water tank 17；Being provided with branch road in the outlet of described ultra concentration booster pump 18 to be connected with the entrance of described evaporation and concentration groove 22, the outlet of described evaporation and concentration groove 22 is connected with the import of cyanide cadmium coating bath 24.
The pipeline connecting described ultra concentration booster pump 18 and the 3rd accurate filter 19, the branch road being connected ultra concentration booster pump 18 and evaporation and concentration groove 22 constitute parallel pipeline.Connect described ultra concentration booster pump 18 with on the pipeline of the 3rd accurate filter 19, is connected on the branch road of ultra concentration booster pump 18 and evaporation and concentration groove 22 and is respectively equipped with controls valve for controlling the flow direction of concentrated solution in ultra concentration water tank 17.
Described pure water tank 15 with the connecting line of cyanide cadmium rinsing tank 25 are additionally provided with pure water booster pump 16.The connecting line of described evaporation and concentration groove 22 and cyanide cadmium coating bath 24 is additionally provided with dope reuse booster pump 23.
At described raw water box 1, ultrafiltration water tank 7, concentration water tank 10, pure water tank 15 and ultra concentration water tank 17 are respectively provided with the liquid level meter carrying out high-low water level control, it is contained in described raw water box 1, ultrafiltration water tank 7, liquid level meter in pure water tank 15 is respectively used to control former water booster pump 2, first high-pressure pump 8, the startup of pure water booster pump 16 and stopping, it is contained in the liquid level meter in described concentration water tank 10 for controlling concentration booster pump 11, the startup of the second high-pressure pump 13 and stopping, it is contained in the liquid level meter in described ultra concentration water tank 17 for controlling startup and the stopping of ultra concentration booster pump 18 and the 3rd high-pressure pump 20.
The filter medium of described quartz filter 3 is quartz sand；The filter medium of described active carbon filter 4 is granular active carbon；The filter element aperture of described first accurate filter 5 is at about 1～10 μm (accurate filter in 5 μm of filter element aperture of the present embodiment employing)；Described ultrafiltration apparatus 6 adopts the ultrafilter membrane of aperture 1～20nm, (ultrafilter membrane of the present embodiment employing aperture 10nm)；The filter element aperture of described second accurate filter 12 is at 1～10 μm (accurate filter in 5 μm of filter element aperture of the present embodiment employing)；The filter element aperture of described 3rd accurate filter 19 is at 1～10 μm (accurate filter in 5 μm of filter element aperture of the present embodiment employing).
The reverse osmosis membrane of described reverse osmosis unit 9 is polyamide composite film, it is preferred to use BW8040-400 polyamide composite film；The NF membrane of described one section of nanofiltration device 14 is polyamide composite film, it is preferred to use DK8040 polyamide composite film；The NF membrane of described two-stage nitration nanofiltration device 21 is polyamide composite film, it is preferred to use DK8040 polyamide composite film.
During use: in cyanide cadmium rinsing tank 25, cyanide cadmium waste water (former water) enters in raw water box 1 by overflow, former water booster pump 2 first by 0.2～0.5MPa allows cyanide cadmium waste water pass sequentially through quartz filter 3 and active carbon filter 4, float in coarse filtration waste water, impurity, Organic substance, fine straining is carried out again with the first accurate filter 5, quartz filter 3, the purification of active carbon filter 4 and the first accurate filter 5 is to filter the Organic substance in waste water, impurity, the harmful components such as float, in order to avoid these materials enter ultrafiltration apparatus 6 and cause the blocking of ultrafiltration apparatus 6, pollution and shortening in service life etc.；Water through quartz filter 3, active carbon filter 4 and the first accurate filter 5 purified treatment is directly entered ultrafiltration apparatus 6; carry out ultra-filtration filters purified treatment; ultrafilter membrane is the perforated membrane that one has super " screening " function; can effectively remove the microgranule in waste water, colloid, antibacterial and macromolecule organic matter; reduce the water quality index such as turbidity, COD, TOC, make reverse osmosis membrane obtain more reliable protection.Return in raw water box 1 through purifying the dense water of pretreated ultrafiltration, ultrafiltration fresh water enters ultrafiltration water tank 7, inject reverse osmosis unit 9 by the first high-pressure pump 8 and carry out reverse osmosis isolation, obtain pure water and reverse osmosis concentrated water, pure water enters pure water tank 15, pump into cyanide cadmium rinsing tank 25 again through pure water booster pump 16 and carry out the rinsing of plating piece, reverse osmosis concentrated water enters concentration water tank 10, water in concentration water tank 10 pumps into the second accurate filter 12 through concentration booster pump 11, remove issuable microgranule in circulation, NF membrane to ensure one section of nanofiltration device 14 is not blocked, pump into one section of nanofiltration device 14 then through the second high-pressure pump 13 and carry out one section of nanofiltration separation process of waste liquid, process, through one section of nanofiltration device 14, the one section of nanofiltration fresh water produced and enter ultrafiltration water tank 7 and ultrafiltration mixing of fresh water, carry out follow-up reverse-osmosis treated, the one section of nanofiltration concentrated solution produced enters ultra concentration water tank 17, ultra concentration water tank 17 concentration of cadmium ions is 5～8 times of influent density；One section of nanofiltration concentrated solution sends into the 3rd accurate filter 19 through ultra concentration supercharging 18, remove issuable microgranule in circulation, NF membrane to ensure two-stage nitration nanofiltration device 21 is not blocked, send into two-stage nitration nanofiltration device 21 again through the 3rd high-pressure pump 20 and carry out two-stage nitration nanofiltration separation process, respectively obtain two-stage nitration nanofiltration fresh water and two-stage nitration nanofiltration concentrated solution, gained two-stage nitration nanofiltration fresh water returns concentration water tank 10 and mixes with reverse osmosis concentrated water, again carries out waste water pre-concentration process；Gained two-stage nitration nanofiltration concentrated solution returns ultra concentration water tank 17 and mixes with the one section of nanofiltration concentrated solution processed through one section of nanofiltration device, again by the 3rd accurate filter 19 and two-stage nitration nanofiltration device 21, it is circulated concentration, when the pressure of two-stage nitration nano filter membrance device 21 reaches 2.3-2.5MPa or water outlet aquifer yield is only small or when not producing water, now in concentrated solution the content of cadmium ion relative to more than 200 times of former water cyanide cadmium waste water, then concentrated solution is pumped into evaporation and concentration groove 22 and is evaporated concentration, cadmium ion content in solution is made to reach more than 300 times of cadmium ion content in former water, use dope reuse booster pump 23 that the concentrated solution in evaporation and concentration groove is sent into cyanide cadmium groove 24 and carry out reuse.
Being not directed to part in this utility model all same as the prior art maybe can adopt prior art to be realized.
Claims (9)
1. a cyanide cadmium Wastewater zero-discharge treatment system, it is characterised in that this system includes raw water box (1), purification pretreatment system, ultrafiltration water tank (7), multi-cycle separation reclaiming system, concentration water tank (10), pure water tank (15), preconcentration technique, circulation concentration systems and evaporation and concentration groove (22)；Described purification pretreatment system includes the quartz filter (3), active carbon filter (4), the first accurate filter (5) and the ultrafiltration apparatus (6) that are sequentially connected；Described multi-cycle separation reclaiming system includes reverse osmosis unit (9)；Described preconcentration technique includes the second accurate filter (12) of being sequentially connected and one section of nanofiltration device (14)；Described circulation concentration systems includes the ultra concentration water tank (17), ultra concentration booster pump (18), the 3rd accurate filter (19) and the two-stage nitration nanofiltration device (21) that are sequentially connected with；
The outlet that the former water inlet of described raw water box (1) rinses tank (25) with cyanide cadmium is connected, the outlet of raw water box (1) is connected with the entrance purifying pretreatment system, the dense water out of the ultrafiltration apparatus (6) of described purification pretreatment system is connected with another entrance of raw water box (1), and the water outlet of ultrafiltration apparatus (6) is connected with an entrance of ultrafiltration water tank (7)；The outlet of ultrafiltration water tank (7) is connected with the entrance of multi-cycle separation reclaiming system；In described multi-cycle separation reclaiming system, the water outlet of reverse osmosis unit (9) is connected with the entrance of pure water tank (15), and the outlet of described pure water tank (15) rinses tank (25) entrance with cyanide cadmium and is connected；The dense water out of described reverse osmosis unit (9) is connected with an entrance of concentration water tank (10)；The outlet of described concentration water tank (10) is connected with the entrance of described preconcentration technique, the water outlet of one section of nanofiltration device (14) of described preconcentration technique is connected with another entrance of ultrafiltration water tank (7), and concentrated solution outlet is connected with an entrance of the ultra concentration water tank (17) of described circulation concentration systems；The water outlet of the two-stage nitration nanofiltration device (21) of described circulation concentration systems is connected with another entrance of concentration water tank (10), and concentrated solution outlet is connected with another entrance of ultra concentration water tank (17)；It is provided with branch road in the outlet of described ultra concentration booster pump (18) to be connected with the entrance of described evaporation and concentration groove (22)；The outlet of described evaporation and concentration groove (22) is connected with the import of cyanide cadmium coating bath (24).
2. cyanide cadmium Wastewater zero-discharge treatment system according to claim 1, it is characterized in that described cyanide cadmium Wastewater zero-discharge treatment system also includes former water booster pump (2), described former water booster pump (2) is located on the connecting line of described raw water box (1) and quartz filter (3).
3. cyanide cadmium Wastewater zero-discharge treatment system according to claim 1, it is characterized in that described cyanide cadmium Wastewater zero-discharge treatment system also includes the first high-pressure pump (8), described first high-pressure pump (8) is located on the connecting line of ultrafiltration water tank (7) and reverse osmosis unit (9)；Outlet described first high-pressure pump (8) is provided with Pressure gauge.
4. cyanide cadmium Wastewater zero-discharge treatment system according to claim 1, it is characterized in that described cyanide cadmium Wastewater zero-discharge treatment system also includes concentration booster pump (11) and the second high-pressure pump (13), described concentration booster pump (11) is located on the export pipeline of described concentration water tank (10), and described second high-pressure pump (13) is located on the connecting line of described second accurate filter (12) and one section of nanofiltration device (14).
5. cyanide cadmium Wastewater zero-discharge treatment system according to claim 1, it is characterised in that described cyanide cadmium Wastewater zero-discharge treatment system also includes the 3rd high-pressure pump (20)；Described 3rd high-pressure pump (20) is located on the connecting line of described 3rd accurate filter (19) and two-stage nitration nanofiltration device (21).
6. cyanide cadmium Wastewater zero-discharge treatment system according to claim 1, it is characterised in that the pipeline of described ultra concentration booster pump (18) and the 3rd accurate filter (19), the branch road being connected ultra concentration booster pump (18) and evaporation and concentration groove (22) constitute parallel pipeline；Connect described ultra concentration booster pump (18) with on the pipeline of the 3rd accurate filter (19), be connected on the branch road of ultra concentration booster pump (18) and evaporation and concentration groove (22) and be respectively equipped with control valve.
7. cyanide cadmium Wastewater zero-discharge treatment system according to claim 1, it is characterised in that be additionally provided with pure water booster pump (16) on described pure water tank (15) with the connecting line of cyanide cadmium rinsing tank (25)；The described evaporation and concentration groove (22) connecting line with cyanide cadmium coating bath (24) is additionally provided with dope reuse booster pump (23).
8. cyanide cadmium Wastewater zero-discharge treatment system according to claim 1, it is characterised in that the filter element aperture of described first accurate filter (5) is at 1～10 μm；Described ultrafiltration apparatus (6) adopts the ultrafilter membrane of aperture 1～20nm；The filter element aperture of described second accurate filter (12) is at 1～10 μm；The filter element aperture of described 3rd accurate filter (19) is at 1～10 μm；
The reverse osmosis membrane of described reverse osmosis unit (9) is polyamide composite film；The NF membrane of described one section of nanofiltration device (14) is polyamide composite film；The NF membrane of described two-stage nitration nanofiltration device (21) is polyamide composite film.
9. cyanide cadmium Wastewater zero-discharge treatment system according to claim 8, it is characterised in that the filter element aperture of described first accurate filter (5) is 5 μm；Described ultrafiltration apparatus (6) adopts the ultrafilter membrane of aperture 10nm；The filter element aperture of described second accurate filter (12) is 5 μm；The filter element aperture of described 3rd accurate filter (19) is 5 μm；
The reverse osmosis membrane of the reverse osmosis membrane of described reverse osmosis unit (9) is BW8040-400 polyamide composite film；The NF membrane of described one section of nanofiltration device (14) is DK8040 polyamide composite film；The NF membrane of described two-stage nitration nanofiltration device (21) is DK8040 polyamide composite film.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106277524A (en) * | 2016-08-31 | 2017-01-04 | 上海交通大学 | The method improving zinc-plated poaching wastewater online resource embrane method closed-system performance |
| CN106277523A (en) * | 2016-08-31 | 2017-01-04 | 上海交通大学 | Improve the short-cut method of cadmium plating poaching wastewater online resource embrane method closed-system efficiency |
| CN106348511A (en) * | 2016-08-31 | 2017-01-25 | 上海交通大学 | Method for improving efficiency of online recycling membrane-process closed system for copper-nickel-chromium electroplating rinse wastewater |
| US10683565B2 (en) | 2018-04-16 | 2020-06-16 | Zoltan J. Kiss | Method of reclaiming cadmium and tellurium from CdTe for CdTe photovoltaic modules |
| CN114470959A (en) * | 2022-03-18 | 2022-05-13 | 内蒙古科泰隆达环保科技有限公司 | Concentration and separation system adopting membrane technology |
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