CN105217862A - A kind of Treating Electroplate Wastewater Containing Nickel zero discharge treatment devices and methods therefor - Google Patents
A kind of Treating Electroplate Wastewater Containing Nickel zero discharge treatment devices and methods therefor Download PDFInfo
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- CN105217862A CN105217862A CN201510612560.7A CN201510612560A CN105217862A CN 105217862 A CN105217862 A CN 105217862A CN 201510612560 A CN201510612560 A CN 201510612560A CN 105217862 A CN105217862 A CN 105217862A
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 105
- 239000002351 wastewater Substances 0.000 title claims abstract description 65
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 33
- 208000028659 discharge Diseases 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 190
- 239000003814 drug Substances 0.000 claims abstract description 41
- 238000011033 desalting Methods 0.000 claims abstract description 34
- 239000011347 resin Substances 0.000 claims abstract description 25
- 229920005989 resin Polymers 0.000 claims abstract description 25
- 238000009713 electroplating Methods 0.000 claims abstract description 18
- 238000001914 filtration Methods 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 238000001704 evaporation Methods 0.000 claims abstract description 11
- 230000008020 evaporation Effects 0.000 claims abstract description 11
- 239000002699 waste material Substances 0.000 claims abstract description 9
- 238000001223 reverse osmosis Methods 0.000 claims description 36
- 239000006200 vaporizer Substances 0.000 claims description 26
- 239000000428 dust Substances 0.000 claims description 17
- 239000004571 lime Substances 0.000 claims description 16
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 15
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 15
- 239000003513 alkali Substances 0.000 claims description 15
- 238000012544 monitoring process Methods 0.000 claims description 15
- 239000010802 sludge Substances 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 13
- 229910001385 heavy metal Inorganic materials 0.000 claims description 13
- 238000007747 plating Methods 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 10
- 230000008676 import Effects 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
- 239000003456 ion exchange resin Substances 0.000 claims description 8
- 229920003303 ion-exchange polymer Polymers 0.000 claims description 8
- 238000001179 sorption measurement Methods 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 6
- 238000001556 precipitation Methods 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000012141 concentrate Substances 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000002950 deficient Effects 0.000 claims description 3
- 238000005374 membrane filtration Methods 0.000 claims description 3
- 238000005649 metathesis reaction Methods 0.000 claims description 3
- 238000001471 micro-filtration Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 2
- 229910000510 noble metal Inorganic materials 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 14
- 239000000463 material Substances 0.000 description 9
- 238000009833 condensation Methods 0.000 description 7
- 230000005494 condensation Effects 0.000 description 7
- 238000010612 desalination reaction Methods 0.000 description 7
- 239000010865 sewage Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000002918 waste heat Substances 0.000 description 4
- 238000007701 flash-distillation Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- 238000005119 centrifugation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910000365 copper sulfate Inorganic materials 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000000909 electrodialysis Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 239000010808 liquid waste Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 150000001455 metallic ions Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000001728 nano-filtration Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
- 239000003403 water pollutant Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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- Separation Using Semi-Permeable Membranes (AREA)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
The invention discloses a kind of Treating Electroplate Wastewater Containing Nickel zero discharge treatment device, comprise resin container, nickel-containing waste water equalizing tank, retort, medicine system, balance tank, two steps ro desalting system and MVR evaporator system, described balance tank go out moisture two-way: a road is connected to reuse water tank through tube type filter membrance filtration unit, water tank with strainer, topping-up pump, accurate filter, high-pressure pump after being connected to two steps ro desalting system after being through recycle pump successively; Another road is back to nickel-containing waste water equalizing tank after the heat exchange evaporation of MVR evaporator system; Whole treating processes by a PLC control device according to each in-line meter Data Control; The present invention also discloses the treatment process utilizing said apparatus, can effectively by the noble metal Ni in electroplating waste liquid containing nickle
2+reclaim, waste liquid after treatment and waste water are used as technique wash-down water; Realize the zero release of this kind of waste water.
Description
Technical field
The present invention relates to a kind of industrial wastewater treatment system, particularly relate to a kind of Treating Electroplate Wastewater Containing Nickel Zero discharge treatment method.
Background technology
Plating is the normal method of metal finishing.It is the process utilizing electrolysis principle to plate other metal or alloy of skim on some metallic surface, utilize electrolytic action to make the technique of the surface attachment layer of metal film of metal or other material thus play and prevent burning (as corrosion), improve the effects such as wear resistance, electroconductibility, reflective, erosion resistance (copper sulfate etc.) and having improved aesthetic appearance.Electroplating industry is the indispensable technology of Surface Processing Industry, is the irreplaceable industries of engineering goods.
China's electroplating industry discharges 40 ~ 5,000,000,000 m every year
3waste water, water pollutant content is much higher compared with other industry, electroplate liquid reaches as high as 20000 ~ 50000mg/L, allow emission standard 2 ~ 50,000 times, process magnitude span is big is comparatively rare in wastewater treatment, from then on also can find out that the process of electroplating wastewater is different from other industry wastewater treatment, has its singularity.The 3rd is listed in the sequence of pollution industry.
The discharge kind of electroplating wastewater mainly contains two kinds, one is plating piece rinse water, when plating piece takes out from coating bath, with a small amount of plating solution on workpiece, in order to not affect next process, reduce the residual bath concentration on workpiece with water rinse or flushing, this part of water is the major portion of electroplating wastewater, the water yield accounts for total amount about 90%, and residual quantity of heavy metal is generally at about 500 ~ 2000mg/L; Another kind is spent plating bath, waste liquid metal ion content about 30000mg/L, and this part liquid waste concentration is very high, needs first to recycle, then is further processed.
At present, electroplating enterprise adopts Chemical Method for Waste Water of Electroplate to account for the overwhelming majority, and the electroplating wastewater of qualified discharge after chemical Treatment, wherein still exist containing micro heavy, be present in water body with heavy metal compound state, easily by animalcule or plant absorption, accumulation, and be transferred to organism in food chain mode, involve human body; And use chemical method large due to the sludge quantity containing heavy metal adding flocculation agent, coagulant aids produces, not easily process, easily cause secondary pollution.
Electroplating wastewater principal pollutant are heavy metal ion, a small amount of organism and prussiate, first using desalination as main treatment process, after metal ion and salt are removed, wash-down water just returns and reuses, when electroplating, electroplated electrode is not by organic substance influence, and desalting method is more, there is ion exchange resin, electrodialysis reverse osmosis, ultrafiltration, nanofiltration etc., main it is considered that wearing quality and operability on equipment choice, cost performance is deputy.
According to China's integrated wastewater discharge standard regulation, nickel is first kinds of pollution matter, and nickel belongs to precious resource again simultaneously; therefore; exploitation Treating Electroplate Wastewater Containing Nickel process new technology, makes the heavy metal in waste water be recycled utilization, all has very important significance to protection of the environment and raising resource utilization.
Summary of the invention
The invention provides a kind of Treating Electroplate Wastewater Containing Nickel Zero discharge treatment method, the heavy metal ion nickel in recyclable electroplating waste liquid containing nickle is exchanged by ion exchange resin, again by after the treatment process process such as tube type filter membrance (TMF), accurate filter and two steps ro after mixing with rinse water or rinse water, water outlet can reuse to electroplating technology wash-down water, realize the target of Treating Electroplate Wastewater Containing Nickel zero release.
In order to solve the problems of the technologies described above, a kind of Treating Electroplate Wastewater Containing Nickel zero discharge treatment device that the present invention proposes, comprise the nickel-containing waste water equalizing tank be connected successively with resin container, retort and equilibrium water groove, described balance tank go out moisture two-way: a road is through after recycle pump successively through tube type filter membrance filtration unit, water tank with strainer, topping-up pump, accurate filter, high-pressure pump is connected to the original water inlet of first-stage reverse osmosis desalting system, described first-stage reverse osmosis desalting system is made up of the RO film of two groups of parallel connections, the product water out of described first-stage reverse osmosis desalting system is connected to the original water inlet of two-pass reverse osmosis desalting system, the product water out of described two-pass reverse osmosis desalting system is connected to reuse water tank, another road is back to nickel-containing waste water equalizing tank connect mechanical filter, preheating heat exchanger, vapor-water heat exchanger, main heat exchanger, vaporizer, discharging pump, dense water pot, whizzer successively after concentrated water tank after, the vapour outlet of described vaporizer is connected to the secondary steam import of main heat exchanger through forced circulation pump, nickel-containing waste water equalizing tank is back to after the liquid outlet of described vaporizer connects discharging pump, dense water pot, whizzer successively, the noncondensable gas outlet of described main heat exchanger is connected to the noncondensable gas import of vapor-water heat exchanger by vacuum pump, the condensation-water drain of described main heat exchanger is connected to water tank with strainer successively after the condensation-water drain of vapor-water heat exchanger and condensate pump, described preheating heat exchanger, the noncondensable gas outlet of described steam separator is connected to the noncondensable gas import of vapor-water heat exchanger through a vacuum pump, the dense water out of described first-stage reverse osmosis desalting system and two-pass reverse osmosis desalting system is all connected to concentrated water tank, be connected with alkali automatic medicament feeding system, lime automatic medicament feeding system and organic dust automatic medicament feeding system with described retort, described retort is provided with pH on-line monitoring meter, the operation of above-mentioned each medicine system by a PLC control device according to each in-line meter Data Control, be provided with recirculation water water distribution system in described balance tank, mud takes into account automatic sludge discharger, described tube type filter membrance filtration unit is furnished with Membrane cleaning system, described reuse water tank is connected with water quality detection warning, and described mud takes into account automatic sludge discharger, Membrane cleaning system is all connected with PLC control device with water quality detection warning, described preheating heat exchanger, vapor-water heat exchanger, main heat exchanger, vaporizer with compressor is equipped with the temperature sensor and pressure transmitter that are connected with described PLC control device.
A kind of Treating Electroplate Wastewater Containing Nickel Zero discharge treatment method of the present invention, adopts above-mentioned Treating Electroplate Wastewater Containing Nickel zero discharge treatment device, and comprises the following steps:
Heavy metal adsorption step: described resin container is built with ion exchange resin, and described ion exchange resin can according to Ni in electroplating wastewater
2+the form existed is different, selects the one in Zeo-karb, anionite-exchange resin and resin; By replacement(metathesis)reaction replaceable go out Ni in waste plating solution
2+, from resin, reclaim Ni afterwards
2+, the adsorption rate of resin heavy metal reaches 90% ~ 95%;
Adding of agent step: be all furnished with stirrer and pit alert system in the grug feeding jar of described alkali automatic medicament feeding system, lime automatic medicament feeding system and organic dust automatic system, the mass percent of concentration of making up a prescription in described alkali automatic medicament feeding system is 5% ~ 15%; The mass percent of concentration of making up a prescription in described lime automatic medicament feeding system is 5% ~ 10%; The mass percent of concentration of making up a prescription in described organic dust automatic medicament feeding system is 5% ~ 10%, and chemical feeding quantity is 50 ~ 100PPM; Working time of alkali automatic medicament feeding system, lime automatic medicament feeding system and organic dust automatic system and state according to the Data Control of pH on-line monitoring meter and pit alert system;
Tube type filter membrance filtration step: described tubular type micro-filtration filtration unit carries out membrane filtration to the liquid in balance tank, and sludge concentration in the beds of precipitation in the balance tank provided by mud meter, judge whether to start automatic sludge discharger;
UTILIZATION OF VESIDUAL HEAT IN and evaporation step: the water outlet in concentrated water tank is carried out being back to nickel-containing waste water equalizing tank after heat exchange evaporation through preheating heat exchanger, vapor-water heat exchanger, main heat exchanger and vaporizer; Meanwhile, temperature, force value on preheating heat exchanger, vapor-water heat exchanger, main heat exchanger, vaporizer and compressor described in described PLC control device Real-Time Monitoring, in order to control working temperature and the pressure of vaporizer, realize dense evaporation of water and concentrate;
Water quality detection step: water quality detection warning detects the water quality in reuse water tank in real time, when the product water water quality coming from two-pass reverse osmosis desalting system is defective, is processed to nickel-containing waste water equalizing tank again by tubes rows.
Compared with prior art, the invention has the beneficial effects as follows:
Spent plating bath passes through resin container 1, selective adsorption target heavy metal ion, and adsorption rate can up to 95%; Nickel-containing waste water equalizing tank 2 is entered with plating piece rinse water or rinse water; Afterwards by adding the pH to 9.5 in the medicament adjustment sewage such as alkali, lime, organic dust (50 ~ 100PPM), be precipitated thing.Water outlet through the impurity screening of TMF filtration unit 11 enters water tank with strainer 12.Water in water tank with strainer 12 pumps into accurate filter 15 by topping-up pump 14, plays the effect of protection subsequent film assembly.Water through filtering pumps into first-stage reverse osmosis desalination system by high-pressure pump 16, and the water after desalination continues to enter two-pass reverse osmosis desalination system, and water outlet enters reuse water tank 19; The high-concentration waste water that first-stage reverse osmosis desalination system 17 (ratio of desalinization 98%), two-pass reverse osmosis desalination system 18 (ratio of desalinization 75%) produce enters concentrated water tank 21, MVR evaporator system is entered with by the waste water balancing tank 8 and regularly enter concentrated water tank 21, evaporation concentration collects salt, the water of condensation produced in evaporative process enters water tank with strainer 12 after utilizing waste heat by just effect heat exchange, the dense water evaporated is by whizzer 35 centrifugation, isolated liquid enters nickel-containing waste water equalizing tank 2 by pipeline, and the business processes of qualification given by the danger of the generation solid that gives up.The present invention is effectively by the noble metal Ni in electroplating waste liquid containing nickle
2+reclaim, waste liquid after treatment and waste water are used as technique wash-down water; Realize the zero release of this kind of waste water.
Accompanying drawing explanation
Fig. 1 is Treating Electroplate Wastewater Containing Nickel Zero discharge treatment method process flow sheet of the present invention.
In figure:
1-resin container 2-nickel-containing waste water equalizing tank 3-retort
4-alkali automatic medicament feeding system 5-lime automatic medicament feeding system 6-organic dust automatic system
7-pH on-line monitoring meter 8-balances tank 9-mud meter
10-recycle pump 11-tube type filter membrance filtration unit 12-water tank with strainer
13-pH on-line monitoring meter 14-topping-up pump 15-accurate filter
16-high-pressure pump 17-first-stage reverse osmosis desalting system 18-two-pass reverse osmosis desalting system
19-reuse water tank 20-water quality detection warning 21-concentrates water tank
22-mechanical filter 23-preheating heat exchanger 24-air-water heat exchanger
25-main heat exchanger 26-vaporizer 27-compressor
28-forced circulation pump 29-air water separator 30-vacuum pump
31-vacuum pump 32-condensate pump 33-discharging pump
34-dense water pot 35-whizzer
Embodiment
Be described in further detail technical solution of the present invention below in conjunction with the drawings and specific embodiments, described specific embodiment only explains the present invention, not in order to limit the present invention.
As shown in Figure 1, a kind of Treating Electroplate Wastewater Containing Nickel zero discharge treatment of the present invention device, comprises the nickel-containing waste water equalizing tank 2, retort 3 and the equilibrium water groove 8 that are connected successively with resin container 1.
Described balance tank 8 go out moisture two-way: a road is connected to the original water inlet of first-stage reverse osmosis desalting system 17 successively through tube type filter membrance filtration unit 11, water tank with strainer 12, topping-up pump 14, accurate filter 15, high-pressure pump 16 after being through recycle pump 10, described first-stage reverse osmosis desalting system 17 is made up of the RO film of two groups of parallel connections, the product water out of described first-stage reverse osmosis desalting system 17 is connected to the original water inlet of two-pass reverse osmosis desalting system 18, and the product water out of described two-pass reverse osmosis desalting system 18 is connected to reuse water tank 19; Another road is back to nickel-containing waste water equalizing tank 2 connect mechanical filter 22, preheating heat exchanger 23, vapor-water heat exchanger 24, main heat exchanger 25, vaporizer 26, discharging pump 33, dense water pot 34, whizzer 35 successively after concentrated water tank 21 after.
The vapour outlet of described vaporizer 26 is connected to the secondary steam import of main heat exchanger 25 through forced circulation pump 28; Nickel-containing waste water equalizing tank 2 is back to after the liquid outlet of described vaporizer 26 connects discharging pump 33, dense water pot 34, whizzer 35 successively; The noncondensable gas outlet of described main heat exchanger 25 is connected to the noncondensable gas import of vapor-water heat exchanger 24 by vacuum pump 30; The condensation-water drain of described main heat exchanger 25 is connected to water tank with strainer 12 successively after the water of condensation import of steam separator 29 and condensate pump 32, described preheating heat exchanger 23; The noncondensable gas outlet of described steam separator 29 is connected to the noncondensable gas import of vapor-water heat exchanger 24 through a vacuum pump 31.Preheating heat exchanger 23 in the present invention, vapor-water heat exchanger 24, main heat exchanger 25, vaporizer 26, compressor 27, forced circulation pump 28, steam separator 29, vacuum pump 30, vacuum pump 31, condensate pump 32, discharging pump 33, dense water pot 34 and whizzer 35 define trade effluent MVR evaporator system, and adopt preheating heat exchanger 23 and vapor-water heat exchanger 24 two sections of elementary preheatings, the waste heat of water of condensation and noncondensable gas and water inlet is utilized to carry out heat exchange respectively, the waste heat that efficiency utilization system produces.
The dense water out of described first-stage reverse osmosis desalting system 17 and two-pass reverse osmosis desalting system 18 is all connected to concentrated water tank 21.
Be connected with alkali automatic medicament feeding system 4, lime automatic medicament feeding system 5 and organic dust automatic medicament feeding system 6 with described retort 3, described retort 3 is provided with pH on-line monitoring meter 7; The operation of above-mentioned each medicine system by a PLC control device according to each in-line meter Data Control.
Be provided with recirculation water water distribution system, mud meter 9 and automatic sludge discharger in described balance tank 8, the recirculation water water distribution system arranged in described balance tank 8 can reduce the impact of recirculation water for the beds of precipitation in tank.Described tube type filter membrance filtration unit 11 is furnished with Membrane cleaning system, can extend the work-ing life of film.Described reuse water tank 19 is connected with water quality detection warning 20, and described mud meter 9 and automatic sludge discharger, Membrane cleaning system are all connected with PLC control device with water quality detection warning 20.
Described preheating heat exchanger 23, vapor-water heat exchanger 24, main heat exchanger 25, vaporizer 26 with compressor 27 is equipped with the temperature sensor and pressure transmitter that are connected with described PLC control device.
In the present invention, the raw material in described organic dust automatic system 6 can select powdered carbon etc.The pore size filter of described accurate filter 15 is 5 μm, is convenient for changing filter core when ensureing that water inlet does not have short stream or leakage phenomenon, thus ensures the water quality of reverse osmosis desalination system water inlet.Be provided with the pH on-line monitoring meter 13 be connected with described PLC control device in described water tank with strainer 12, water outlet pH (pH value is 6 ~ 9) whether up to standard can be monitored at any time, add acid for adjusting pH wherein if not up to standard to scope up to standard.
The method utilizing above-mentioned Treating Electroplate Wastewater Containing Nickel zero discharge treatment device to carry out processing comprises:
Heavy metal adsorption step: described resin container 1 is built with ion exchange resin, and described ion exchange resin is according to according to Ni in electroplating wastewater
2+the form existed is different, selects the one in Zeo-karb, anionite-exchange resin and resin, as how according to Ni in electroplating wastewater
2+a kind of common practise and customary means belonging to the art in the formal character Zeo-karb existed, anionite-exchange resin, resin, does not repeat them here; By replacement(metathesis)reaction replaceable go out Ni in waste plating solution
2+, from resin, reclaim Ni afterwards
2+, in the present invention, the adsorption rate of resin heavy metal can reach 90% ~ 95%.
Adding of agent step: described alkali automatic medicament feeding system 4, lime automatic medicament feeding system 5 and organic dust automatic system 6 are furnished with the adjustable chemical feeding quantity of volume pump, all being furnished with stirrer in grug feeding jar wherein can timely molten medicine, also all pit alert system is furnished with in grug feeding jar, can alarm be sent during low liquid level, remind timely dosing.The mass percent of concentration of making up a prescription in described alkali automatic medicament feeding system 4 is (5% ~ 15%); The mass percent of concentration of making up a prescription in described lime automatic medicament feeding system 5 is (5% ~ 10%); The mass percent of concentration of making up a prescription in described organic dust automatic medicament feeding system 5 is (5% ~ 10%), and chemical feeding quantity is 50 ~ 100PPM; Working time of alkali automatic medicament feeding system 4, lime automatic medicament feeding system 5 and organic dust automatic system 6 and state according to the Data Control of pH on-line monitoring meter 7 and pit alert system; In the present invention, in described retort 3, be provided with pH on-line monitoring meter 7, can pH value in Real-Time Monitoring retort 3; Due to the supporting alkali automatic medicament feeding system 4 of retort 3, lime automatic medicament feeding system 5 and organic dust automatic medicament feeding system 6, therefore, can realize to Automatic Dosing in retort 3 according to design discharge and pH value, to ensure that in retort 3, pH value is for 9.5.
Tube type filter membrance filtration step: described tubular type micro-filtration filters (TMF) device 11 and carries out membrane filtration to the liquid in balance tank 8, and sludge concentration in the beds of precipitation in the balance tank 12 provided by mud meter 9, judge whether to start automatic sludge discharger; Be provided with mud meter 9 and automatic sludge discharger in described balance tank 8, measure in tank sludge concentration in the beds of precipitation by mud meter 9 and judge disconnected whether spoil disposal, realize science automatic mud removing.
UTILIZATION OF VESIDUAL HEAT IN and evaporation step: the water outlet in concentrated water tank 21 is back to nickel-containing waste water equalizing tank 2 after preheating heat exchanger 23, vapor-water heat exchanger 24 and main heat exchanger 25 carries out heat exchange evaporation; Further, the water outlet in concentrated water tank 21 is back to nickel-containing waste water equalizing tank 2 after mechanical filter 22, preheating heat exchanger 23, vapor-water heat exchanger 24, main heat exchanger 25, vaporizer 26, discharging pump 33, dense water pot 34, whizzer 35; Wherein, the water of condensation in main heat exchanger 25 enters air water separator 29 by condensation-water drain, enters preheating heat exchanger 23 by condensate pump 32, carries out pre-heating heat-exchanging with the water of concentrated water tank 21 in preheating heat exchanger 23; Noncondensable gas in main heat exchanger 25 enters vapor-water heat exchanger 24 by vacuum pump 30; Noncondensable gas in steam separator 29 enters vapor-water heat exchanger 24 by vacuum pump 31; In vapor-water heat exchanger 24, secondary heat exchange is carried out with the water of preheating heat exchanger 23.Water outlet in concentrated water tank 21 enters vapor-water heat exchanger 24 through mechanical filter 22 after preheating heat exchanger 23 carries out first heat exchange, carry out in vapor-water heat exchanger 24 secondary heat exchange laggard enter main heat exchanger 25.Water outlet in concentrated water tank 21, before entering main heat exchanger 25, enters preheating heat exchanger 23, vapor-water heat exchanger 24 successively, carries out twice heat exchange, and the waste heat that effective utilization system produces carries out twice pre-heat exchange, reduces the energy expenditure of system.Simultaneously, temperature, force value on preheating heat exchanger 23, vapor-water heat exchanger 24, main heat exchanger 25, vaporizer 26 and compressor 27 described in described PLC control device Real-Time Monitoring, in order to control working temperature and the pressure of vaporizer 26, realize dense evaporation of water and concentrate;
Water quality detection step: water quality detection warning 20 detects the water quality in reuse water tank 19 in real time, when the product water water quality coming from two-pass reverse osmosis desalting system 18 is defective, again processed to nickel-containing waste water equalizing tank 2 by tubes rows, and do not carry out reuse.
The detailed process of a kind of Treating Electroplate Wastewater Containing Nickel of the present invention zero discharge treatment is as follows:
(1) electroplating effluent discharged by plating tank enters resin container 1;
(2) sewage in resin container 1 enters nickel-containing waste water equalizing tank 2 by pipeline after ion-exchange; Plating piece rinsing or rinse water enter nickel-containing waste water equalizing tank 2 by pipeline;
(3) sewage in nickel-containing waste water equalizing tank 2 enters retort 3 through pipeline, sewage pH is regulated by adding appropriate bases, lime and organic dust in retort 3, reach the effect of removing residual metallic ion and protection subsequent film assembly in sewage, enter balance tank 8 through reacted sewage by pipeline;
(4) sewage balanced in tank 8 pumps into TMF filtration unit 11 by recycle pump 10, by the filteration of film, is separated by solid from solution; Water outlet flows into water tank with strainer 12 through pipeline;
(5) water in water tank with strainer 12 pumps into accurate filter 15 by topping-up pump 14;
(6) two-pass reverse osmosis desalting system 18 is entered after the water outlet of accurate filter 15 pumps into first-stage reverse osmosis desalting system 17 by high-pressure pump 16; Reuse water tank 19 is entered by the water outlet after the process of two steps ro desalting system;
(7) high-concentration waste water that first-stage reverse osmosis desalting system 17, two-pass reverse osmosis desalting system 18 produce enters condensed water case 21 by pipeline, and the waste water regularly entering concentrated water tank 21 with balance tank 8 has pipeline to enter mechanical filter 22;
(8) mechanical filter 22 water outlet enters preheating heat exchanger 23, enters vapor-water heat exchanger 24 after carrying out heat exchange with the water outlet water of condensation by steam separator 29 in preheating heat exchanger;
(9) material after preheating heat exchanger 23 preheating enters vapor-water heat exchanger 24, with the noncondensable gas of being discharged by main heat exchanger 25 and steam separator 29 carry out in vapor-water heat exchanger 24 heat exchange laggard enter main heat exchanger 25;
(10) material after vapor-water heat exchanger 24 preheating enters main heat exchanger 25, and carry out heat exchange with the secondary steam produced by compressor 27, the material after heat exchange enters vaporizer 26
(11) noncondensable gas produced in main heat exchanger 25 pumps into vapor-water heat exchanger 24 by vacuum pump 30, discharges after carrying out heat exchange with material in vapor-water heat exchanger 24; The water of condensation produced in main heat exchanger 25 enters steam separator 29;
(12) material come from main heat exchanger (25) enters after vaporizer 26 carries out flash distillation, and the concentrated solution after flash distillation pumps into dense water pot 34 by discharging pump 33; The secondary steam (90 ~ 95 DEG C) that flash distillation produces enters compressor 27, and the secondary steam (105 ~ 110 DEG C) after overdraft enters main heat exchanger 25;
(13) in vaporizer 26, unconcentrated material pumps into main heat exchanger 25 by forced circulation pump 28 and carries out pump circulation (speed of circulation can reach 1.5 ~ 3.5m/s);
(14) noncondensable gas produced in steam separator 29 pumps into vapor-water heat exchanger 24 by vacuum pump 31, discharges after carrying out heat exchange with material in vapor-water heat exchanger 24; The water of condensation produced in steam separator 29 pumps into preheating heat exchanger 23 by condensate pump 32, enters water tank with strainer 12 with material in preheating heat exchanger 23 after carrying out heat exchange;
(15) the dense water in dense water pot 34 enters whizzer 35 and carries out centrifugation, and isolated liquid enters nickel-containing waste water equalizing tank 2 by pipeline, and the business processes of qualification given by the danger of the generation solid that gives up.
Although invention has been described by reference to the accompanying drawings above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; instead of it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; when not departing from present inventive concept, can also make a lot of distortion, these all belong within protection of the present invention.
Claims (4)
1. a Treating Electroplate Wastewater Containing Nickel zero discharge treatment device, comprise the nickel-containing waste water equalizing tank (2), retort (3) and the equilibrium water groove (8) that are connected successively with resin container (1), it is characterized in that, described balance tank (8) go out moisture two-way:
One tunnel is through after recycle pump (10) successively through tube type filter membrance filtration unit (11), water tank with strainer (12), topping-up pump (14), accurate filter (15), high-pressure pump (16) is connected to the original water inlet of first-stage reverse osmosis desalting system (17), described first-stage reverse osmosis desalting system (17) is made up of the RO film of two groups of parallel connections, the product water out of described first-stage reverse osmosis desalting system (17) is connected to the original water inlet of two-pass reverse osmosis desalting system (18), the product water out of described two-pass reverse osmosis desalting system (18) is connected to reuse water tank (19),
Another road is back to nickel-containing waste water equalizing tank (2) connect mechanical filter (22), preheating heat exchanger (23), vapor-water heat exchanger (24), main heat exchanger (25), vaporizer (26), discharging pump (33), dense water pot (34), whizzer (35) successively after concentrated water tank (21) after;
The vapour outlet of described vaporizer (26) is connected to the secondary steam import of main heat exchanger (25) through forced circulation pump (28); Nickel-containing waste water equalizing tank (2) is back to after the liquid outlet of described vaporizer (26) connects discharging pump (33), dense water pot (34), whizzer (35) successively;
The noncondensable gas outlet of described main heat exchanger (25) is connected to the noncondensable gas import of vapor-water heat exchanger (24) by vacuum pump (30);
The condensation-water drain of described main heat exchanger (25) is connected to water tank with strainer (12) successively after the condensation-water drain of vapor-water heat exchanger (29) and condensate pump (32), described preheating heat exchanger (23); The noncondensable gas outlet of described steam separator (29) is connected to the noncondensable gas import of vapor-water heat exchanger (24) through a vacuum pump (31);
The dense water out of described first-stage reverse osmosis desalting system (17) and two-pass reverse osmosis desalting system (18) is all connected to concentrated water tank (21);
Be connected with alkali automatic medicament feeding system (4), lime automatic medicament feeding system (5) and organic dust automatic medicament feeding system (6) with described retort (3), described retort (3) is provided with pH on-line monitoring meter (7); The operation of above-mentioned each medicine system by a PLC control device according to each in-line meter Data Control;
Recirculation water water distribution system, mud meter (9) and automatic sludge discharger is provided with in described balance tank (8), described tube type filter membrance filtration unit (11) is furnished with Membrane cleaning system, described reuse water tank (19) is connected with water quality detection warning (20), and described mud meter (9) and automatic sludge discharger, Membrane cleaning system are all connected with PLC control device with water quality detection warning (20);
Described preheating heat exchanger (23), vapor-water heat exchanger (24), main heat exchanger (25), vaporizer (26) with compressor (27) is equipped with the temperature sensor and pressure transmitter that are connected with described PLC control device.
2. Treating Electroplate Wastewater Containing Nickel zero discharge treatment device according to claim 1, is characterized in that, be provided with the pH on-line monitoring meter (13) be connected with described PLC control device in described water tank with strainer (12).
3. Treating Electroplate Wastewater Containing Nickel zero discharge treatment device according to claim 1, it is characterized in that, the pore size filter of described accurate filter (15) is 5 μm.
4. a Treating Electroplate Wastewater Containing Nickel Zero discharge treatment method, is characterized in that: adopt as Treating Electroplate Wastewater Containing Nickel zero discharge treatment device as described in arbitrary in claims 1 to 3, the method comprises:
Heavy metal adsorption step: described resin container (1) is built with ion exchange resin, and described ion exchange resin is according to according to Ni in electroplating wastewater
2+the form existed is different, selects the one in Zeo-karb, anionite-exchange resin and resin; By replacement(metathesis)reaction replaceable go out Ni in waste plating solution
2+, from resin, reclaim Ni afterwards
2+, the adsorption rate of resin heavy metal reaches 90% ~ 95%;
Adding of agent step: be all furnished with stirrer and pit alert system in the grug feeding jar of described alkali automatic medicament feeding system (4), lime automatic medicament feeding system (5) and organic dust automatic system (6), the mass percent of concentration of making up a prescription in described alkali automatic medicament feeding system (4) is 5% ~ 15%; The mass percent of concentration of making up a prescription in described lime automatic medicament feeding system (5) is 5% ~ 10%; The mass percent of concentration of making up a prescription in described organic dust automatic medicament feeding system (5) is 5% ~ 10%, and chemical feeding quantity is 50 ~ 100PPM; Working time of alkali automatic medicament feeding system (4), lime automatic medicament feeding system (5) and organic dust automatic system (6) and state according to the Data Control of pH on-line monitoring meter (7) and pit alert system;
Tube type filter membrance filtration step: described tubular type micro-filtration filtration unit (11) carries out membrane filtration to the liquid in balance tank (8), and sludge concentration in the beds of precipitation in the balance tank (12) provided by mud meter (9), judge whether to start automatic sludge discharger;
UTILIZATION OF VESIDUAL HEAT IN and evaporation step: the water outlet in concentrated water tank (21) is back to nickel-containing waste water equalizing tank (2) after preheating heat exchanger (23), vapor-water heat exchanger (24), main heat exchanger (25) and vaporizer (26) carry out heat exchange evaporation; Simultaneously, temperature, force value on preheating heat exchanger (23), vapor-water heat exchanger (24), main heat exchanger (25), vaporizer (26) and compressor (27) described in described PLC control device Real-Time Monitoring, in order to control working temperature and the pressure of vaporizer (26), realize dense evaporation of water and concentrate;
Water quality detection step: water quality detection warning (20) detects the water quality in reuse water tank (19) in real time, when the product water water quality coming from two-pass reverse osmosis desalting system (18) is defective, again processed to nickel-containing waste water equalizing tank (2) by tubes rows.
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| CN105692992A (en) * | 2016-01-27 | 2016-06-22 | 苏州得润环保科技有限公司 | Recycling and disposal system for nickel-containing wastewater |
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