CN109650576A - One kind containing chromium, zinc electroplating wastewater online recycling processing unit and treatment process - Google Patents
One kind containing chromium, zinc electroplating wastewater online recycling processing unit and treatment process Download PDFInfo
- Publication number
- CN109650576A CN109650576A CN201910141212.4A CN201910141212A CN109650576A CN 109650576 A CN109650576 A CN 109650576A CN 201910141212 A CN201910141212 A CN 201910141212A CN 109650576 A CN109650576 A CN 109650576A
- Authority
- CN
- China
- Prior art keywords
- zinc
- sea
- water
- filtration
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002351 wastewater Substances 0.000 title claims abstract description 116
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 83
- 239000011701 zinc Substances 0.000 title claims abstract description 83
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 83
- 238000009713 electroplating Methods 0.000 title claims abstract description 56
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 229910052804 chromium Inorganic materials 0.000 title claims abstract description 52
- 239000011651 chromium Substances 0.000 title claims abstract description 52
- 238000004064 recycling Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims description 21
- 230000008569 process Effects 0.000 title description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 90
- 238000001471 micro-filtration Methods 0.000 claims abstract description 78
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 claims abstract description 35
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 32
- 238000001764 infiltration Methods 0.000 claims abstract description 20
- 239000013505 freshwater Substances 0.000 claims description 33
- 230000003750 conditioning effect Effects 0.000 claims description 30
- 230000002745 absorbent Effects 0.000 claims description 11
- 239000002250 absorbent Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 10
- 230000009467 reduction Effects 0.000 claims description 10
- 238000005188 flotation Methods 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 7
- 238000009295 crossflow filtration Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 5
- 239000000725 suspension Substances 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 230000001351 cycling effect Effects 0.000 claims description 3
- 230000003139 buffering effect Effects 0.000 claims 1
- 238000007781 pre-processing Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 10
- 238000006722 reduction reaction Methods 0.000 description 8
- 239000012528 membrane Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 241000208340 Araliaceae Species 0.000 description 3
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 3
- 235000003140 Panax quinquefolius Nutrition 0.000 description 3
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 235000008434 ginseng Nutrition 0.000 description 3
- 238000003672 processing method Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 229910001430 chromium ion Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 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 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000003957 anion exchange resin Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003729 cation exchange resin Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229940125368 controlled substance Drugs 0.000 description 1
- 239000000599 controlled substance Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 239000006210 lotion Substances 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000009287 sand filtration Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- HRZFUMHJMZEROT-UHFFFAOYSA-L sodium disulfite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])(=O)=O HRZFUMHJMZEROT-UHFFFAOYSA-L 0.000 description 1
- 235000010262 sodium metabisulphite Nutrition 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/70—Treatment of water, waste water, or sewage by reduction
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention belongs to technical field of waste water processing, it provides a kind of containing chromium, zinc electroplating wastewater online recycling processing unit, it include: chromate waste water pretreatment system, zinc-containing water pretreatment system, microfiltration systems, the light system in sea and counter-infiltration system, the chromate waste water pretreatment system and the zinc-containing water pretreatment system are connected with the microfiltration systems respectively, the microfiltration systems are connected with the light system in sea, and the light system in sea and the counter-infiltration system are interconnected so as to form circulation loop.The present invention is by respectively pre-processing electroplating wastewater of chromium and Zinc-containing electroplating waste water, make it respectively reach the primary of microfiltration systems to require, micro-filtration processing, the light processing in sea and reverse osmosis treatment are successively carried out again, may finally obtain the recycle-water for reaching recycle water standard.
Description
Technical field
The present invention relates to technical field of waste water processing, and in particular to one kind is containing chromium, zinc electroplating wastewater online recycling processing dress
It sets and treatment process.
Background technique
Current domestic and international electroplating industry, the processing method containing zinc, chromate waste water mainly have: the electronation precipitation method, electrolysis
Method and ion-exchange.
The processing of the electronation precipitation method mainly makees reducing agent containing zinc, chromium waste water with waste iron filing or ferrous sulfate, passes through oxygen
Change reduction reaction, make it is maximum being reduced into low toxicity containing zinc, chromium waste water Poisoning, then plus flocculant that trivalent chromium will be made to generate will be heavy
It forms sediment, is then separated by solid-liquid separation, to achieve the purpose that except chromium.But the water that it is handled through the method is unable to reuse, chromium ion
Be difficult to recycle, secondary pollution still there may be.
Electrolysis method processing containing zinc, chromium waste water technology on it is more mature, but the controlled substance as defined in discharge standard contains
Measure extremely low, so processing method power consumption in electrolysis wastewater is larger, processing cost is high, and is also easy to produce toxic gas, difficult
Qualified discharge is arrived with processing.
Ion-exchange is that the ion in a kind of ion and water by means of on ion-exchanger swaps reaction and removes
The method in water containing zinc, chromium ion is gone, using anion exchange resin, can be effectively removed in waste water in chromate or weight chromium
Acid group state, it can then be removed using cation exchange resin in waste water and other metal ions.This method can be used for chrome-plating bath
Washing closed water circulation system, advantage be processing after be discharged, water quality is fabulous, water and chromic acid recoverable.But the processing
Amount of resin required for method is big, and processing cost is high；And resin is in regenerative process, due to the receipts of regeneration, the generation of resin
Contracting and a large amount of ruptures for expanding and causing resin, economy be not high.
It can be seen that there are problems for the processing method of electroplating wastewater at present, one is needed to contain electroplating industry
Zinc, chromium waste water carry out online recycling, meet waste water and stablize reuse, save the processing scheme of water resource.
Summary of the invention
For the defects in the prior art, the present invention provide it is a kind of containing chromium, zinc electroplating wastewater online recycling processing unit and
Treatment process, to improve the online recycling rate of electroplating wastewater.
In a first aspect, provided by the invention contain chromium, zinc electroplating wastewater online recycling processing unit, comprising: chromate waste water is pre-
Processing system, zinc-containing water pretreatment system, microfiltration systems, the light system in sea and counter-infiltration system, the chromate waste water pretreatment
System and the zinc-containing water pretreatment system are connected with the microfiltration systems respectively, the microfiltration systems and the light system in sea
It is connected, the light system in sea and the counter-infiltration system are interconnected so as to form circulation loop.
It optionally, further include press filteration system, the press filteration system is interconnected so as to form with the microfiltration systems and is recycled back to
Road.
Optionally, the microfiltration systems include sequentially connected micro-filtration circulating slot and micro-filtration filter；The light system in sea
Including the light filter of the sequentially connected light circulating slot in sea and sea；The counter-infiltration system includes sequentially connected reverse-osmosis circulating slot
And reverse osmosis filter.
Optionally, the chromate waste water pretreatment system and the zinc-containing water pretreatment system are followed with the micro-filtration respectively
Annular groove is connected, and the micro-filtration filter is connected with the light circulating slot in sea, the light filter in sea and the reverse-osmosis circulating slot
It is connected, the reverse-osmosis circulating slot is connected with the light circulating slot in sea.
Optionally, the chromate waste water pretreatment system include sequentially connected chromate waste water conditioning tank, pH value conditioning tank,
Reduction pond and buffer pool, the buffer pool are connected with the micro-filtration circulating slot.
Optionally, the zinc-containing water pretreatment system include sequentially connected zinc-containing water conditioning tank, air-flotation system and
Oil absorbent material system, the oil absorbent material system are connected with the micro-filtration circulating slot.
Optionally, between the micro-filtration circulating slot and micro-filtration filter, between the light filter of the light circulating slot in sea and sea, reverse osmosis
Elevator pump is respectively provided between saturating circulating slot and reverse osmosis filter.
Optionally, the filter sizes of the micro-filtration filter are 0.1-0.01 μm.
Second aspect, it is provided by the invention to carry out online recycling to containing chromium, zinc electroplating wastewater using the processing unit
The technique of processing, includes the following steps:
S1. electroplating wastewater of chromium is collected into chromate waste water conditioning tank, electroplating wastewater of chromium enters the progress of pH value conditioning tank
Acid adding is adjusted, and is entered back into reduction pond and is carried out reduction treatment, it is spare to finally enter buffer pool；
S2. by Zinc-containing electroplating wastewater collection to zinc-containing water conditioning tank, Zinc-containing electroplating waste water enters air-flotation system and is consolidated
Liquid separating treatment enters back into oil absorbent material system and degreases with spare；
S3. start microfiltration systems, the electroplating wastewater of chromium by S1 and the Zinc-containing electroplating waste water by S2 is made to enter micro-filtration
Circulating slot carries out cross-flow filtration by micro-filtration filter, obtains fresh water A, and fresh water A then enters the light circulating slot in sea of the light system in sea,
Circulation concentration is carried out, remaining suspension is discharged through micro-filtration circulating slot, and it forms concentrated water A and enters press filteration system progress mud-water separation,
The fresh water D obtained after separation continues back at micro-filtration circulating slot and carries out circular treatment；
S4. the light system in starting sea, makes to enter the light filter in sea by the fresh water A of S3 and carries out the light filtering in sea, obtain fresh water B and
Concentrated water C, concentrated water C are collected into dope bucket, and the reverse-osmosis circulating slot that fresh water B then enters counter-infiltration system carries out circular treatment；
S5. start counter-infiltration system, make to enter reverse osmosis filter progress osmosis filtration by the fresh water B of S4, obtain
Fresh water C and concentrated water D, concentrated water D are back to the light circulating slot in sea by circulation loop and continue cycling through concentration, and fresh water C is collected into recycle-water
Production line reuse is used in bucket.
Optionally, the cross-flow filtration refers to that the flow direction of feed fluid is parallel with the filter direction of plane.
Beneficial effects of the present invention:
1. the present invention respectively reaches it micro- by pre-processing respectively to electroplating wastewater of chromium and Zinc-containing electroplating waste water
The primary of filter system requires, then successively carries out micro-filtration processing, and the light processing in sea and reverse osmosis treatment may finally obtain and reach back
The recycle-water of water supply standard.
2. the present invention can achieve the online recycling containing zinc, chromium waste water, waste water stablizes reuse, quality of reused water obtained
Meet technique and work in product water supply standard (GB/T19923-2005) in " reclaimed urban waste water utilizes industry water standard "
Skill and product water supply standard, it is 6.5~8.5 that pH is required in the water supply standard, COD (COD)≤30mg/L, suspended matter
(SS)≤25mg/L, 75% is back to production entirely, and ton reuse waste water power consumption drops to 10kwh or less.
3. the present invention contains zinc, chromium waste water online recycling application technology using plating, product facility is installed under production line
Or side, it reduces by 60% equipment land used, since equipment is short with a distance from production line collection waste water mouth, reduces Pipe installing, save
Construction period is saved.In addition, generally raising height according to production line, production line down space can be made full use of, it is possible to reduce
60% equipment land used.
4. the present invention, using optimal dual-membrane process, realizes the smallest energy consumption in the case where satisfaction water quality,
To reduce the cost of equipment operation.
5. the present invention can reduce waste discharge, classification of waste processing, online reuse will accord with the demands of the market.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described.In all the appended drawings, similar element
Or part is generally identified by similar appended drawing reference.In attached drawing, each element or part might not be drawn according to actual ratio.
Fig. 1 is the process flow chart containing chromium, zinc electroplating wastewater online recycling processing unit provided by the embodiment of the present invention；
Fig. 2 is the structure containing chromium, the chromate waste water pretreatment system of zinc electroplating wastewater online recycling processing unit shown in Fig. 1
Block diagram；
Fig. 3 is the structure containing chromium, the zinc-containing water pretreatment system of zinc electroplating wastewater online recycling processing unit shown in Fig. 1
Block diagram；
Fig. 4 is the structural block diagram containing chromium, the microfiltration systems of zinc electroplating wastewater online recycling processing unit shown in Fig. 1；
Fig. 5 is the structural block diagram shown in Fig. 1 containing chromium, the light system in sea of zinc electroplating wastewater online recycling processing unit；
Fig. 6 is the structural block diagram containing chromium, the counter-infiltration system of zinc electroplating wastewater online recycling processing unit shown in Fig. 1.
Detailed description of the invention:
Chromate waste water pretreatment system -10；Chromate waste water conditioning tank -11；PH value conditioning tank -12；
Restore pond -13；Buffer pool -14；Zinc-containing water pretreatment system -20；Zinc-containing water conditioning tank -21；
Air-flotation system -22；Oil absorbent material system -23；Microfiltration systems -30；Micro-filtration circulating slot -31；
Micro-filtration filter -32；The light system -40 in sea；The light circulating slot -41 in sea；The light filter -42 in sea；
Counter-infiltration system -50；Reverse-osmosis circulating slot -51；Reverse osmosis filter -52；Press filteration system -60；
Dope bucket -71；Reuse bucket -72；Elevator pump -81；Flowmeter -82；Pressure gauge -83；
EC on-line detector -84；Liquid-level floater -85；PH on-line detector -87；
ORP on-line detector -91；Accurate filter -92；High-pressure pump -93；Rupture disk -94；Circulating pump -95
Specific embodiment
It is described in detail below in conjunction with embodiment of the attached drawing to technical solution of the present invention.Following embodiment is only used for
Clearly illustrate technical solution of the present invention, therefore be intended only as example, and cannot be used as a limitation and limit protection of the invention
Range.
It should be noted that unless otherwise indicated, technical term or scientific term used in this application should be this hair
The ordinary meaning that bright one of ordinary skill in the art are understood.
Embodiment 1
Fig. 1 is the process flow chart provided by the embodiment of the present invention 1 containing chromium, the processing of zinc electroplating wastewater online recycling.Ginseng
See Fig. 1, the embodiment of the present invention 1 provides a kind of containing chromium, zinc electroplating wastewater online recycling processing unit, comprising: chromate waste water is pre-
Processing system 10, zinc-containing water pretreatment system 20, microfiltration systems 30, the light system 40 in sea and counter-infiltration system 50.
Referring to Fig. 1, chromate waste water pretreatment system 10 and zinc-containing water pretreatment system 20 respectively with 30 phase of microfiltration systems
Even, microfiltration systems 30 are connected with the light system 40 in sea, and the light system 40 in sea is interconnected so as to form circulation loop with counter-infiltration system 50.
Fig. 2 is the knot containing chromium, the chromate waste water pretreatment system 10 of zinc electroplating wastewater online recycling processing unit shown in Fig. 1
Structure block diagram.Referring to fig. 2, the chromate waste water pretreatment system 10 includes sequentially connected chromate waste water conditioning tank 11, pH value tune
Section pond 12, reduction pond 13 and buffer pool 14, the buffer pool 14 are connected with the micro-filtration circulating slot 31.
Since the major pollutants in chromate waste water are Cr6+, it is necessary first to which first plus sulfuric acid carries out pH value adjusting, adds
Reducing agent sodium pyrosulfite, which can be reduced into Cr6+ Cr3+, reduces its toxicity.
Referring to fig. 2, chromate waste water is collected into chromate waste water conditioning tank 11, is equipped with and is used in chromate waste water conditioning tank 11
In the liquid-level floater 85 for determining wherein wastewater flow rate, it is equipped with and mentions in the pipeline of connection chromate waste water conditioning tank 11 and pH value conditioning tank 12
Pump 81 and flowmeter 82 are risen, for pumping chromate waste water into pH value conditioning tank 12.It is equipped in pH value conditioning tank 12 for detecting
The pH on-line detector 87 of liquid pH value.Restore the ORP on-line checking being equipped in pond 13 for detecting liquid redox current potential
Instrument 91.It is turned on compressed air in pH value conditioning tank 12 and reduction pond 13, water quality can be made more uniform.
Fig. 3 is the knot containing chromium, the zinc-containing water pretreatment system 20 of zinc electroplating wastewater online recycling processing unit shown in Fig. 1
Structure block diagram.Referring to Fig. 3, the zinc-containing water pretreatment system 20 includes sequentially connected zinc-containing water conditioning tank 21, air bearing system
System and oil absorbent material system 23, the oil absorbent material system 23 are connected with the micro-filtration circulating slot 31.
Major pollutants in zinc-containing water are oil, it is therefore desirable to carry out oil removing and come out.
Referring to Fig. 3, chromate waste water is collected into zinc-containing water conditioning tank 21, is equipped with and is used in zinc-containing water conditioning tank 21
In the liquid-level floater 85 for determining wherein wastewater flow rate, connects and be equipped with elevator pump in the pipeline of zinc-containing water conditioning tank 21 and air-flotation system
81, for pumping zinc-containing water into air-flotation system.Air-flotation system 22 is to generate a large amount of fine gas bubbles in water, fine gas bubbles with
Small suspended particles mutually stick in waste water, form " bubble particles " complex that global density is less than water, suspended particles are with bubble one
It rises and floats to the water surface, formation foam is floating to be looked into, so that suspended matter in water be enable to separate.Suspended matter in zinc-containing water is removed
Afterwards, into carrying out oil removal treatment in oil absorbent material system 23.
Fig. 4 is the structural block diagram containing chromium, the microfiltration systems 30 of zinc electroplating wastewater online recycling processing unit shown in Fig. 1.Ginseng
See that Fig. 4, the microfiltration systems 30 include sequentially connected micro-filtration circulating slot 31 and micro-filtration filter 32.
Micro-filtration circulating slot 31 receives to be disposed in chromate waste water pretreatment system 10 and zinc-containing water pretreatment system 20
Waste water, be equipped with for pumping water in micro-filtration filter 32 in the pipeline between micro-filtration circulating slot 31 and micro-filtration filter 32
Elevator pump 81 and flowmeter 82, pressure gauge 83 and EC on-line detector 84.Waste water enters in micro-filtration filter 32 by cross-flow
After processing, the fresh water of acquisition enters in the light circulating slot 41 in sea, and remaining suspension is back in micro-filtration circulating slot 31.In micro-filtration mistake
Flowmeter 82, pressure gauge 83 and EC on-line detector 84 are equipped in the pipeline of the light circulating slot 41 of filter 32 and sea.It is filtered in micro-filtration
Device 32 is then equipped with pressure gauge 83 and EC on-line detector 84 into the return loop of micro-filtration circulating slot 31.
Microfiltration systems 30 are a kind of New Wastewater Treatment Technology arts using film work principle of filter, and the pore diameter range of filter membrane is
Between 0.1-0.01 μm, it is suitble to suspension and lotion be retained or is concentrated and low turbidity liquid degerming.For dissimilarity
The filter membrane of different pore size can be selected in the waste water of matter.
To reduce fouling membrane, microfiltration systems 30 use cross-flow operation mode.In cross-flow operation, the flowing side of feed fluid
To parallel with the direction of membrane plane, it is clear that turbulent extent can be improved and reduce boundary layer thickness by increasing flow velocity and flow, mitigate film table
Face pollution.In practical engineering applications, we select the flow velocity of 3-6m/s.Since fluid can generate by force under very high flow velocity
Strong turbulent flow, and huge shearing force is generated in film surface, back within the particle being deposited on film surface micropore in fluid.
Microfiltration systems 30 are the wastewater processing technologies for being developed and being improved based on such principle, are beaten water using circulating pump 95
Enter membranous system and carry out cross-flow filtration, to realize separation process.Microfiltration systems 30 completely instead of conventional waste water handle in wadding
The techniques such as solidifying, precipitating, sand filtration, active carbon and ultrafiltration fully meet the row of sewage treatment the advantage is that: treatment effect is stablized
Put requirement；Occupied area is small, effectively save land resource；Save construction investment；It can be reduced according to water modularization Design by Stages
Initial outlay；RO system reuse can be discharged or be directly entered to water outlet after adjusting pH value, facilitate owner extend reuse at any time and
It is not limited by any technique；Cleaning frequency is long, reduces operating cost.
Fig. 5 is the structural block diagram shown in Fig. 1 containing chromium, the light system 40 in sea of zinc electroplating wastewater online recycling processing unit.Ginseng
See Fig. 5, the light system 40 in sea includes the light circulating slot 41 in sequentially connected sea and the light filter 42 in sea.
The light circulating slot 41 in sea is received through the processed fresh water of micro-filtration filter 32.The light circulating slot 41 in sea and the light filter 42 in sea
Between pipeline in be equipped with elevator pump 81, be equipped with accurate filter 92 and high-pressure pump between the light filter 42 of elevator pump 81 and sea
93, accurate filter 92 is between elevator pump 81 and high-pressure pump 93.Between elevator pump 81 and accurate filter 92 also successively
Equipped with pressure gauge 83, flowmeter 82 and EC on-line detector 84.It is also successively arranged between the light filter 42 of high-pressure pump 93 and sea
Rupture disk 94, pressure gauge 83, circulating pump 95 and pressure gauge 83.Water enters after the light filter 42 in sea filters, the fresh water of acquisition into
Enter reverse-osmosis circulating slot 51 and carry out circular treatment, is equipped with EC on-line detector 84 and flowmeter 82 in the fresh water circuit；It obtains
Concentrated water, which enters in dope bucket 71, to be recycled, and pressure gauge 83 and flowmeter 82 are equipped in the concentrated water circuit.
Fig. 6 is the structural block diagram containing chromium, the counter-infiltration system 50 of zinc electroplating wastewater online recycling processing unit shown in Fig. 1.
Referring to Fig. 6, the counter-infiltration system 50 includes sequentially connected reverse-osmosis circulating slot 51 and reverse osmosis filter 52.
Reverse-osmosis circulating slot 51 is received through the processed fresh water of extra large light filter 42.Reverse-osmosis circulating slot 51 and reverse osmosis penetrate
It is successively arranged elevator pump 81 in pipeline between filter 52, secondary filter is equipped between elevator pump 81 and reverse osmosis filter 52
Device 92 and high-pressure pump 93, accurate filter 92 is between elevator pump 81 and high-pressure pump 93.In elevator pump 81 and accurate filter
Pressure gauge 83, flowmeter 82 and EC on-line detector 84 are also successively arranged between 92.In high-pressure pump 93 and reverse osmosis filter 52
Between be also successively arranged pressure gauge 83, circulating pump 95 and pressure gauge 83.Water enters after the filtering of reverse osmosis filter 52, acquisition
Fresh water, which enters in reuse bucket 72, to be recycled, and EC on-line detector 84 and flowmeter 82 are equipped in the fresh water circuit；It obtains
Concentrated water is back to the light circulating slot 41 in sea and continues the light processing in sea, is equipped with pressure gauge 83 and flowmeter 82 in the concentrated water circuit.
The elevator pump 81 of the present embodiment uses single-stage filter pump, and high-pressure pump 93 uses plunger pump.
The micro-filtration filter 32, the light filter 42 in sea and reverse osmosis filter 52 of the present embodiment are by corresponding filter membrane, film
Shell and film frame composition, filter membrane are set in putamina, and putamina is set on film frame.
Flowmeter 82 is used to monitor the flow into the water of micro-filtration filter 32, and pressure gauge 83 and EC on-line detector 84 divide
The pressure and EC value in pipeline Yong Yu not monitored.
It further include press filteration system 60 referring to Fig. 1, the press filteration system 60 is interconnected so as to form with the microfiltration systems 30
Circulation loop.
The main body of press filteration system 60 is filter press, it is therefore an objective to remove the impurity such as the silt in water removal.
Embodiment 2
The technique for carrying out online recycling processing to the chromate waste water and zinc-containing water of 10 batches using the system of embodiment 1,
As shown in Figure 1, including the following steps:
S1. electroplating wastewater of chromium is collected into chromate waste water conditioning tank 11, electroplating wastewater of chromium enters pH value conditioning tank 12
Acid adding adjusting is carried out, reduction pond 13 is entered back into and carries out reduction treatment, it is spare to finally enter buffer pool 14；
S2. by Zinc-containing electroplating wastewater collection to zinc-containing water conditioning tank 21, Zinc-containing electroplating waste water enter air-flotation system 22 into
Row solid-liquid separation treatment enters back into oil absorbent material system 23 and degreases with spare；
S3. start microfiltration systems 30, enter the electroplating wastewater of chromium by S1 and the Zinc-containing electroplating waste water by S2 micro-
Circulating slot 31 is filtered, carries out cross-flow filtration by micro-filtration filter 32, obtains fresh water A, the sea that fresh water A then enters the light system 40 in sea is light
Circulating slot 41 carries out circulation concentration, and remaining suspension is discharged through micro-filtration circulating slot 31, forms concentrated water A and enters press filteration system 60
Mud-water separation is carried out, the fresh water D obtained after separation continues back at micro-filtration circulating slot 31 and carries out circular treatment；
S4. the light system 40 in starting sea, makes to enter the light filter 42 in sea by the fresh water A of S3 and carries out the light filtering in sea, obtains light
Water B and concentrated water C, concentrated water C are collected into dope bucket 71, fresh water B then enter the reverse-osmosis circulating slot 51 of counter-infiltration system 50 into
Row circular treatment；
S5. start counter-infiltration system 50, make to enter the progress osmosis filtration of reverse osmosis filter 52 by the fresh water B of S4,
Fresh water C and concentrated water D are obtained, concentrated water D is back to the light circulating slot 41 in sea by circulation loop and continues cycling through concentration, and fresh water C is collected into
Production line reuse is used in reuse bucket 72.
Using pH in national standard detection method (GB/T19923-2005) detection chromate waste water, zinc-containing water and recycle-water,
COD and SS value, the results are shown in Table 1.
Table 1
Wherein, pH, COD and SS value of the waste water before handling in table 1 take the greater pair in chromate waste water and zinc-containing water
The value answered.
Chromate waste water and zinc-containing water are in the reuse after online recycling is handled, obtained it can be seen from upper table result
PH, COD and SS value meet the standard of recycle-water in water.
Unless specifically stated otherwise, the numerical value otherwise illustrated in these embodiments is not limit the scope of the invention.?
In all examples shown and described herein, unless otherwise prescribed, any occurrence should be construed as merely illustratively, and
Not by way of limitation, therefore, other examples of exemplary embodiment can have different values.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme should all cover within the scope of the claims and the description of the invention.
Claims (10)
1. one kind contains chromium, zinc electroplating wastewater online recycling processing unit characterized by comprising chromate waste water pretreatment system,
Zinc-containing water pretreatment system, microfiltration systems, the light system in sea and counter-infiltration system, the chromate waste water pretreatment system and described
Zinc-containing water pretreatment system is connected with the microfiltration systems respectively, and the microfiltration systems are connected with the light system in sea, described
The light system in sea and the counter-infiltration system are interconnected so as to form circulation loop.
2. according to claim 1 contain chromium, zinc electroplating wastewater online recycling processing unit, which is characterized in that further include pressure
Filter system, the press filteration system and the microfiltration systems are interconnected so as to form circulation loop.
3. according to claim 2 contain chromium, zinc electroplating wastewater online recycling processing unit, which is characterized in that the micro-filtration
System includes sequentially connected micro-filtration circulating slot and micro-filtration filter；The light system in sea includes the sequentially connected light circulating slot in sea
With the light filter in sea；The counter-infiltration system includes sequentially connected reverse-osmosis circulating slot and reverse osmosis filter.
4. according to claim 3 contain chromium, zinc electroplating wastewater online recycling processing unit, which is characterized in that described to contain chromium
Waste water pretreatment system and the zinc-containing water pretreatment system are connected with the micro-filtration circulating slot respectively, the micro-filtration filter
Be connected with the light circulating slot in sea, the light filter in sea is connected with the reverse-osmosis circulating slot, the reverse-osmosis circulating slot with
The light circulating slot in sea is connected.
5. according to claim 3 contain chromium, zinc electroplating wastewater online recycling processing unit, which is characterized in that described to contain chromium
Waste water pretreatment system includes sequentially connected chromate waste water conditioning tank, pH value conditioning tank, reduction pond and buffer pool, the buffering
Pond is connected with the micro-filtration circulating slot.
6. according to claim 3 contain chromium, zinc electroplating wastewater online recycling processing unit, which is characterized in that described to contain zinc
Waste water pretreatment system includes sequentially connected zinc-containing water conditioning tank, air-flotation system and oil absorbent material system, the oil absorbent material system
System is connected with the micro-filtration circulating slot.
7. according to claim 3 contain chromium, zinc electroplating wastewater online recycling processing unit, which is characterized in that the micro-filtration
Between circulating slot and micro-filtration filter, between the light filter of the light circulating slot in sea and sea, reverse-osmosis circulating slot and reverse osmosis filter
Between be respectively provided with elevator pump.
8. according to claim 3 contain chromium, zinc electroplating wastewater online recycling processing unit, which is characterized in that the micro-filtration
The filter sizes of filter are 0.1-0.01 μm.
9. a kind of carry out online recycling to containing chromium, zinc electroplating wastewater using the processing unit of any of claims 1-8
The technique of processing, which comprises the steps of:
S1. electroplating wastewater of chromium is collected into chromate waste water conditioning tank, electroplating wastewater of chromium enters pH value conditioning tank and carries out acid adding
It adjusts, enters back into reduction pond and carry out reduction treatment, it is spare to finally enter buffer pool；
S2. by Zinc-containing electroplating wastewater collection to zinc-containing water conditioning tank, Zinc-containing electroplating waste water enters air-flotation system and carries out solid-liquid point
From processing, enters back into oil absorbent material system and degrease with spare；
S3. start microfiltration systems, the electroplating wastewater of chromium by S1 and the Zinc-containing electroplating waste water by S2 is made to enter micro-filtration circulation
Slot carries out cross-flow filtration by micro-filtration filter, obtains fresh water A, and fresh water A then enters the light circulating slot in sea of the light system in sea, carries out
Circulation concentration, remaining suspension are discharged through micro-filtration circulating slot, form concentrated water A and enter press filteration system progress mud-water separation, separation
The fresh water D obtained afterwards continues back at micro-filtration circulating slot and carries out circular treatment；
S4. the light system in starting sea makes to enter the sea light filtering in light filter progress sea by the fresh water A of S3, obtains fresh water B and concentrated water
C, concentrated water C are collected into dope bucket, and the reverse-osmosis circulating slot that fresh water B then enters counter-infiltration system carries out circular treatment；
S5. start counter-infiltration system, make to enter reverse osmosis filter progress osmosis filtration by the fresh water B of S4, obtain fresh water C
The light circulating slot in sea is back to by circulation loop and continues cycling through concentration with concentrated water D, concentrated water D, fresh water C is collected into reuse bucket and uses
In production line reuse.
10. processing unit according to claim 9 to containing chromium, zinc electroplating wastewater carry out online recycling processing technique,
It is characterized in that, the cross-flow filtration refers to that the flow direction of feed fluid is parallel with the filter direction of plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910141212.4A CN109650576A (en) | 2019-02-26 | 2019-02-26 | One kind containing chromium, zinc electroplating wastewater online recycling processing unit and treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910141212.4A CN109650576A (en) | 2019-02-26 | 2019-02-26 | One kind containing chromium, zinc electroplating wastewater online recycling processing unit and treatment process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109650576A true CN109650576A (en) | 2019-04-19 |
Family
ID=66123744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910141212.4A Pending CN109650576A (en) | 2019-02-26 | 2019-02-26 | One kind containing chromium, zinc electroplating wastewater online recycling processing unit and treatment process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109650576A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201610402U (en) * | 2009-12-23 | 2010-10-20 | 苏州市环境工程有限责任公司 | Recycling and deep treatment device for electronic electroplating wastewater |
| CN104230113A (en) * | 2014-09-23 | 2014-12-24 | 扬州佳境环境设备有限公司 | Zero-discharging treatment technology for electroplating complexing wastewater and device for treatment technology |
| CN104261598A (en) * | 2014-09-23 | 2015-01-07 | 扬州佳境环境设备有限公司 | Zero-discharge treatment process and device for printed circuit board developing wastewater |
| CN204508986U (en) * | 2015-01-30 | 2015-07-29 | 广东深泰环保科技有限公司 | Integrative electroplating waste treatment system |
| CN204897623U (en) * | 2015-08-06 | 2015-12-23 | 广州市中绿环保有限公司 | PCB high concentration organic waste water advanced treatment unit |
| CN209583817U (en) * | 2019-02-26 | 2019-11-05 | 扬州佳境环境科技股份有限公司 | One kind containing chromium, zinc electroplating wastewater online recycling processing unit |
-
2019
- 2019-02-26 CN CN201910141212.4A patent/CN109650576A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201610402U (en) * | 2009-12-23 | 2010-10-20 | 苏州市环境工程有限责任公司 | Recycling and deep treatment device for electronic electroplating wastewater |
| CN104230113A (en) * | 2014-09-23 | 2014-12-24 | 扬州佳境环境设备有限公司 | Zero-discharging treatment technology for electroplating complexing wastewater and device for treatment technology |
| CN104261598A (en) * | 2014-09-23 | 2015-01-07 | 扬州佳境环境设备有限公司 | Zero-discharge treatment process and device for printed circuit board developing wastewater |
| CN204508986U (en) * | 2015-01-30 | 2015-07-29 | 广东深泰环保科技有限公司 | Integrative electroplating waste treatment system |
| CN204897623U (en) * | 2015-08-06 | 2015-12-23 | 广州市中绿环保有限公司 | PCB high concentration organic waste water advanced treatment unit |
| CN209583817U (en) * | 2019-02-26 | 2019-11-05 | 扬州佳境环境科技股份有限公司 | One kind containing chromium, zinc electroplating wastewater online recycling processing unit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201056504Y (en) | Vehicle mounted sea water desalting apparatus | |
| WO2022143014A1 (en) | Resourceful treatment system and method for sodium nitrate wastewater | |
| CN105948313A (en) | Mixed treatment process for stainless steel pickling wastewater and washing wastewater | |
| CN110183018A (en) | A kind of shunt electroplating sewerage Zero discharge treatment method | |
| CN207748952U (en) | A kind of electroplating wastewater reclaimer | |
| CN209583817U (en) | One kind containing chromium, zinc electroplating wastewater online recycling processing unit | |
| CN105600983B (en) | A kind of minimizing processing method of high slat-containing wastewater | |
| CN202208663U (en) | Seawater desalination treatment equipment | |
| CN109650576A (en) | One kind containing chromium, zinc electroplating wastewater online recycling processing unit and treatment process | |
| CN104649481B (en) | A kind of equipment for processing waste emulsified mixture | |
| CN109824197A (en) | A kind of processing unit and treatment process of fastener surface processing waste water | |
| CN209740898U (en) | Fastener surface treatment waste water's processing apparatus | |
| CN210915626U (en) | Radioactive wastewater resource recovery system | |
| CN215886594U (en) | Recycling treatment device for sewage discharged by circulating cooling water | |
| CN111018203B (en) | Nickel-containing heavy metal wastewater resource recovery device | |
| CN209652000U (en) | A kind of processing system of nickel-containing waste water | |
| CN210505915U (en) | High enriched waste water zero release processing apparatus | |
| CN209493349U (en) | A kind of recycle-water advanced treatment apparatus | |
| CN209276289U (en) | A kind of purification reuse means of acid-washing waste acid | |
| CN103253798B (en) | Zero discharge treatment and recycling method for chromium ions in electroplating wastewater and device of method | |
| CN208279434U (en) | PCB wastewater treatment and renovation system | |
| CN206173117U (en) | Cyclic utilization raw water purifier | |
| CN207130053U (en) | A kind of RO concentrated waters and the water reuse (treatment processing system of recirculated water draining | |
| CN206173046U (en) | Acidproof hyperfiltration membrane device | |
| CN205616661U (en) | Purifier of cyclic utilization raw water |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |