CN102086072A - Cyclic utilization device of dyeing and printing advanced treatment wastewater and method thereof - Google Patents
Cyclic utilization device of dyeing and printing advanced treatment wastewater and method thereof Download PDFInfo
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Abstract
The invention relates to a cyclic utilization device of dyeing and printing advanced treatment wastewater and a method thereof. The cyclic utilization device contains a nanometer catalytic electrolysis system, an immersed ultrafiltration-membrane filtration separation system and an electrodialysis system which are connected in turn, wherein the dyeing and printing advanced treatment wastewater passes through the nanometer catalytic electrolysis system, the immersed ultrafiltration-membrane filtration separation system and the electrodialysis system in sequence to perform nanometer catalytic electrolysis, ultrafiltration and filtration, and electrodialysis treatment. The cyclic utilization device of the invention has the outstanding advantages that the recovery rate of water is high, the cost is low, the decoloring and deodorizing effects are good, the total discharge amount of wastewater chemical oxygen demand (COD) can be greatly reduced, the biological pollution of membrane can be eliminated, no secondary pollution is caused, the amount of sludge can be greatly reduced, the floor space is small, the quality of the reused water is high, the energy consumption is greatly reduced during the operation of the device, etc.
Description
Technical field
The present invention relates to techniques of Dyeing Wastewater Treatment, particularly relate to a kind of printing and dyeing advanced treatment cycling utilization of wastewater devices and methods therefor.
Background technology
Textile industry generally includes 5 big integral parts such as weaving, printing and dyeing, chemical fibre, the manufacturing of clothing and textile specific equipment.Along with fast development of national economy, dyeing industry has also entered high-speed development period, and equipment and state of the art obviously promote, production technique and equipment are brought in constant renewal in and are regenerated, the printing and dyeing enterprise development is very rapid, and up to the present, only just there are the above printing and dyeing enterprise of scale more than 2000 families in China.Dyeing and printing process refers in process of production all kinds of textile materials fibers, yarn, fabric be carried out physics and chemically treated general name, comprises pre-treatment, dyeing, stamp and back arrangement process to textile materials, is referred to as dyeing and printing process.
Current, the development of textile technology is guiding to produce ecological textile and green manufacture technology, set about by all kinds of means from technology, auxiliary agent, equipment etc., catch the source, pay attention to the ecological problem of each link in the production process, make great efforts to optimize textile technology, reduce the consumption of chemical agent, water, the energy, with reach efficiently, at a high speed, the purpose of environmental protection.Dropped into big strength exploitation environmental protection type dye auxiliary agent both at home and abroad, water saving, energy-conservation, reduce discharging novel process and new installation, aspect anhydrous and few watermark dyeing technique, all there is bigger development aspects such as coating dye printing aspect and energy-conservation, the utility model of the economizing on water technology of weaving.Although the water saving of textile printing and dyeing industry and wastewater processing technology are rapidly developed, but, textile printing and dyeing wastewater remains one of major polluting sources in China's industrial system, according to State Environmental Protection Administration's statistics, the dyeing waste water total amount of dyeing discharging is positioned at the 5th of each industrial sector total emission volumn of the whole nation.Dyeing waste water at first is that contamination level is big as the characteristics of the important source of pollution of environment, at present, world's printing and dyeing annual production is about 80～900,000 tons, China printing and dyeing annual production reaches 150,000 tons, occupies prostatitis, the world, has 10%～15% printing and dyeing component to enter environment with waste water approximately in the production of printing and dyeing with in using.The printing and dyeing industry and the textile printing and dyeing industry prosperity of China, dyeing waste water is even more serious to the pollution of environment, whole industry water displacement 13.6 billion cubic meters in 2004, its gross contamination emission then is positioned at six of each Department of Industry's family status in COD.The secondth, as many, the complex structure of printing and dyeing kind of environmental pollutant.The synthetic printing and dyeing that the whole world is used reach kind more than 30,000, and the printing and dyeing more than 80% are the complex organic compound that contains azo bond, poly aromatic nucleus.Printing and dyeing industry is one of extremely serious industry of environmental pollution in the chemical industry, and dyeing waste water colourity is big; The organic concentration height, the component complexity; Recalcitrant substance is many; Contain a large amount of inorganic salt, sulfide etc., belong to unmanageable trade effluent.Remove because the printing and dyeing molecule has complicated aromatic hydrocarbon molecular structure and is difficult to more, this is in water surrounding or in illumination with stable existence under the condition of oxygenant is arranged when manufacturing and designing for these structures.The 3rd is that most printing and dyeing are poisonous hardly degraded organic substance, and chemical stability is strong, has carcinogenic, teratogenesis and mutagenic " three cause " effect.Even printing and dyeing component concentration remaining in the waste water is very low, enters water body and also can cause the water body transmittance to reduce the destruction that causes water ecosystem.Therefore, dyeing waste water effectively is treated as important problem.
The water quality of dyeing waste water have Pollutant levels height, kind many, contain characteristics such as poisonous objectionable constituent and colourity height, at present both at home and abroad in this class wastewater treatment treatment process commonly used mainly contain multiple treatment technologies such as physics method, chemical method, biological process.
Though above-mentioned the whole bag of tricks all has good treatment effect, also there is following problem:
Aspect materialization, though gac has the characteristics of advantages of good adsorption effect, the regeneration of activated carbon difficulty, the cost height is restricted its application.The sorbent material that many enterprises turn to other low prices, material to be easy to get respectively.Though electrolytic process, oxidation style have certain effect in the colourity of removing dyeing waste water, often the COD removal is unsatisfactory, and the cost of handling medicament is also higher relatively, and many novel oxidation means also are in experimental study stage, not industrialization.
Aspect biochemical, printing and dyeing are typical fine chemical products, have short run, the characteristics of many kinds, its complex structure, Production Flow Chart is long, expects that from former finished product often is attended by unit operations such as nitrated, condensation, reduction, oxidation, diazotization, coupling, and byproduct is many, product yield is low, process operations such as wastewater through organic matter complicated component, printing and dyeing are produced chemical reaction process and separated, make with extra care, washing all are to be solvent with water, and water consumption is very big.Though the biochemical process treatment of dyeing and printing has the advantage of less investment, have still that microorganism is difficult to adapt to shortcomings such as dyeing waste water, variation water quality is big, toxicity is big, and exist the biogas of sludge disposal, anaerobism section to handle and problem such as complex management.In addition, though adopt the little electrolysis process of iron carbon as electrode, obtain certain progress aspect treatment of dyeing and printing, the iron carbon consumption brings a large amount of precipitations, makes the waste water after the processing be difficult to utilize, and can only reach emission standard.
Treatment of dyeing wastewater adopts single treatment process often to be difficult to get a desired effect.Conventional method is that each treatment process is made up, and has defectives such as technical process is long, running cost is high, effluent characteristics instability, and the sewage after the processing is nearly to 2 grades of emission standards.Because this waste discharge has passed through several different methods such as biochemistry, chemistry, materialization respectively and has handled, physico-chemical property is very stable, follow-up decolorizing purification is difficulty very, general method all is difficult to it is carried out further decolorizing purification, and this discharging that reaches the advanced treatment waste water of 2 grades of dischargings also will cause secular influence to environment.On the other hand, current Freshwater resources are more and more nervous, water supply contradiction becomes increasingly conspicuous, printing and dyeing advanced treatment waste water if can be carried out recycle, not only significantly alleviated influence, and saved a large amount of Freshwater resources and reduced the water consumption index and the discharge of wastewater index of printing and dyeing enterprise significantly environment.
In recent years, comparatively fast developed with chemical method and physics method bonded treatment method of printing and dying wastewater or with the treatment method of printing and dying wastewater of biochemical treatment and physics.Chinese patent ZL200710008643.0 discloses a kind of treatment method of printing and dying wastewater based on membrane technique, and it is the treatment method of printing and dying wastewater that chemical flocculation precipitation, biochemical treatment and reverse osmosis isolation technology are combined.Chinese patent ZL200910112879.8 discloses a kind of printing and dyeing advanced treatment waste water plant and method, it be with dyeing waste water through the waste water of second pond after the biochemical treatment through the little electrolysis of nano-catalytic after again through reverse osmosis membrane filtration, the dialyzate cyclic utilization method.The characteristics of these methods are ratio of desalinization height, produce water water quality height (in fact, not requiring so high water quality in the printing and dyeing enterprise production), still, exist investment in fixed assets big, and energy consumption is big, and the regeneration cost of waste water is higher, the defective that reclamation rate is on the low side.
Summary of the invention
The objective of the invention is at existing investment in fixed assets in the existing treatment method of printing and dying wastewater big, energy consumption is big, the regeneration cost of waste water is higher, reclamation rate is on the low side, problems such as waste water resource provide a kind of and combine with electrodialytic technique based on nano-catalytic electrolysis tech, immersion ultra-filtration technique, and cost is lower, usefulness is higher, makes it to reach the printing and dyeing advanced treatment cycling utilization of wastewater device and method of waste water reclamation recycle.
The present invention adopts following technical scheme:
Printing and dyeing advanced treatment wastewater device of the present invention is provided with:
The nano-catalytic electrolytic system: the nano-catalytic electrolytic system is used for processing such as nano-catalytic electrolysis, precipitation and filtration, and the nano-catalytic electrolytic system is provided with stopping valve, water pump, nano-catalytic electrolysis machine, setting tank and filtration unit; The second pond water port of the external dyeing waste water biochemical treatment system of the import of stopping valve, the import of water pump connects the outlet of stopping valve, meter import of catalytic electrolysis machine is admitted in the outlet of water pump respectively, the outlet of nano-catalytic electrolysis machine connects the import of setting tank, the import of filtration unit connects the outlet of setting tank, and the outlet of setting tank connects through the water-in of stopping valve with submerged ultrafiltration filtering separation system; Filtration is a kind of in sand filtration, multi-medium filtering, the micro-filtration etc.
Submerged ultrafiltration filtering separation system: submerged ultrafiltration filtering separation system be used for nano-catalytic electrolytic system gained printing and dyeing purify liquid waste filtrations, separate dialyse water and concentrated solution.Submerged ultrafiltration filtering separation system is provided with stopping valve, submerged ultrafiltration pond, gas blower, aerator, ultrafiltration membrane system, suction pump and dialysis water basin.The printing and dyeing of nano-catalytic electrolytic system gained are purified liquid waste and are entered membrane cisterna by water inlet pipe and stopping valve.Ultra-filtration membrane is immersed in during printing and dyeing in the membrane cisterna purify liquid waste, suction pump is crossed membranous wall from the ultra-filtration membrane inboard with the water negative pressure-pumping, and the dialysis water of generation is collected dialysis water basin by suction pump and is used for further must supplying the reuse water of production cocycle utilization through electrodialytic desalting.The outlet of rice catalytic electrolysis system setting tank is admitted in the import of stopping valve, and the outlet of stopping valve connects the import in submerged ultrafiltration pond, and the outlet in submerged ultrafiltration pond enters dialysis water basin through suction pump, stopping valve successively.
Described submerged ultrafiltration filtering system can be removed solid impurity in the waste water, planktonic organism, bacterium, colloid etc., and submerged membrane adopts the open filter design of external pressure, can directly be immersed in the waste water, so the floor space of system is little.Its working conditions is: normal temperature～45 ℃, operating pressure is 1～50kPa.
The ultra-filtration membrane cleaning system: the ultra-filtration membrane cleaning system is used to clean the ultrafiltration membrance filter separation system, the ultra-filtration membrane cleaning system is provided with cleaning fluid tank, backwashing pump, stopping valve and duct coupling, the outlet of cleaning fluid tank connects the import of backwashing pump, the back flushing pump outlet connects the import of stopping valve, and the outlet of stopping valve connects ultrafiltration membrane system.
Electrodialysis system: electrodialysis system is provided with stopping valve, working shaft, electrodialysis machine, dialysis water basin, concentrated solution basin.The import of stopping valve connects the outlet of submerged ultrafiltration filtering separation system dialysis water basin, the outlet of stopping valve connects the import of working shaft, the water supply pump outlet connects the import of electrodialysis machine, and the dialysis water out of electrodialysis machine connects dialysis water basin, and electrodialytic concentrated solution outlet connects the concentrated solution basin.
Described electrodialysis system comprises pole-reversing electroosmosis system (EDR), liquid film electrodialysis system (EDLM), fills electrodialysis system (EDI), bipolar electrodialysis system (EDMB) and electrodeless water power dialysis system.
Described electrodialysis system can make it satisfy the specification of quality of production technique waters different in the industrial production with being separated into dialysis water (de-salted water) and concentrated solution through submerged ultrafiltration filtering separation system gained dialysis water through electrodialysis.Electrodialytic working conditions is operating voltage 0.5～3.0 ㎏/㎝
2, operating voltage 50～250V, strength of current 1～3A.
Described electrodialysis system can carry out one section desalination, two sections desalinations or three sections desalinations according to the saltiness in the waste water, thereby makes the saltiness of reuse water satisfy industrial process water requirement, and its ratio of desalinization can reach 45～80%.
The purifying method of dyeing waste water of the present invention may further comprise the steps:
Step 1, nano-catalytic electrolysis: will be after water pump extracts through the printing and dyeing advanced treatment waste water of second pond after the biochemical treatment, carry out the nano-catalytic electrolysis in the input nano-catalytic electrolysis machine, enter the setting tank precipitation through valve again, import filtration unit then and filter, remove the solid impurity, planktonic organism, bacterium, the colloid that produce because of the nano-catalytic electrolysis in the waste water and must purify liquid waste.
The little electrolytic operating voltage of described nano-catalytic can be 2～250V, and adjacent two interelectrode voltages are 2～18V, and adjacent two interelectrode optimum voltages are 3～8V, and current density is 5～300mA/cm
2, the best is 50～200mA/cm for current density
2, the waste water process electrolysis of printing and dyeing advanced treatment is after in the valve inflow setting tank.Adopt the nano-catalytic electrolysis to have following outstanding effect: (1) kills microorganism in the waste water with the chlorine [Cl] of the status nascendi that the nano-catalytic electrolysis produces, make in the waste water microorganism live body drop to 30/below the ml, the elimination microorganism is to the pollution of mould material.(2) ammonia nitrogen in the oxygenolysis waste water makes the further oxidation of residual ammonia nitrogen, and the decreasing ratio of ammonia nitrogen can reach 80～90%.(3) reduce the colourity and the smell of waste water significantly, the colourity of having passed through the printing and dyeing advanced treatment waste water that several different methods such as biochemistry, materialization handle the back second pond is between 80～300 and frowziness, general treatment process is difficult to further decolouring degree and removal stink, the colourity of printing and dyeing advanced treatment waste water can be reduced to 16～32 between 80～300 through the nano-catalytic electrolysis.(4) organism in the oxygenolysis waste water, residual dye reduces COD fast
Cr(5) suspended substance, colloid, charged corpuscle in the waste water condensed form larger particles under electric field action after, remove to such an extent that purify liquid waste through filtering.(6) heavy metal ion in the waste water moves to the negative electrode of electrolysis machine electrolyzer, forms precipitation at negative electrode, thereby reduces the heavy metal ion content in the waste water.
The sodium chloride content of described dyeing waste water can be 6 ‰～50 ‰, is preferably 0.6 ‰～1.3 ‰, can add industrial sodium-chlor when sodium chloride content is not enough and be supplemented to 6 ‰～50 ‰.
Described nano-catalytic electrolysis is the oxygen that the electrolysis of printing and dyeing advanced treatment waste water process nano-catalytic is made it to generate chlorine [Cl], hydroxyl and the status nascendi of status nascendi, in order to organism in the oxygenolysis waste water and ammonia nitrogen, and kill microorganism in the waste water, simultaneously, under electric field action, make suspended substance, colloid, charged corpuscle cohesion in the waste water form larger particles.
Step 2, immersion ultra-filtration filters: the purification dyeing waste water after will handling through nano-catalytic electrolytic system system flows into immersion ultrafiltration system filtration treatment, the water of must dialysing through pipeline.
Step 3, electrodialysis: will send into electrodialysis system through water pump through the purification dyeing waste water of immersion ultrafiltration system processing gained, and carry out electrodialytic desalting, and get de-salted water and concentrated solution.
The present invention compares with two embrane method (ultrafiltration+reverse osmosis or ultrafiltration+nanofiltration) treatment processs, both overcome the too high defective of its cost, it is undesirable to have overcome water treatment effect again, the defective of the contaminated wastewater environment of discharging, and can change the rotten manner that is, the change refuse is resource, with existing printing and dyeing advanced treatment wastewater and reclaiming recycle, has following outstanding advantage:
1, the rate of recovery of the rate of recovery height of water, the low water of cost is up to 60%～100%, and waste discharge is few, and energy consumption is low, and working cost is lower than the cost of the biochemical terminal two membrane filtration treatment technologies of tradition, and ton water (reuse water) cost is far below existing water price from the beginning;
2, take off the coloring matter of flavor in the effective rapid oxygenolysis waste water, take off distinguish the flavor of effective.As: the second pond chroma in waste water is 200 o'clock, and after the nano-catalytic electrolysis machine was handled, colourity was less than 32;
3, the traditional biochemical end of total release that reduces waste water COD significantly adds membrane filtration technique, though can realize water reuse in the part, but can not reduce the total release of waste water COD, the present invention is the organism in the oxygenolysis waste water rapidly, reduces the total release of waste water COD significantly;
4, the biological pollution of eradicating film can be killed the bacterium in the waste water, and the biological pollution of eradicating film reduces the wash number of film significantly, reduces film cleaning regeneration cost, improves the service efficiency of film, prolongs the work-ing life of film, reduces the film replacement cost;
5, there is not secondary pollution to adopt the nano-catalytic electrolysis tech that the technology of second pond wastewater treatment is substituted the materialization treatment process, need not add chemical substances such as flocculation agent, discoloring agent and gas floatation agent, not only save cost, and save material consumption and do not produce secondary pollution;
When 6, reducing mud significantly and adopt the present invention to handle waste water, adopt nano-catalytic electrolysis tech surrogate metallization processes after the second pond water outlet, need not add chemical substances such as flocculation agent, discoloring agent, mud has only 1/2nd of conventional art;
7, take up an area of few technological process of production weak point, compact equipment is taken up an area of few;
8, the high reprocessing cycle water colorless of reuse water quality, tasteless, water quality is far above GB/T19923-2005 " municipal effluent reclaimed wastewater reuse process water water quality " standard;
9, substitute reverse osmosis desalination or nanofiltration desalination with electrodialytic desalting, investment in fixed assets reduces significantly, and energy consumption descends significantly during the equipment operation.
Description of drawings
Fig. 1 is that the structure of printing and dyeing advanced treatment cycling utilization of wastewater devices and methods therefor embodiment of the present invention is formed synoptic diagram.
Embodiment
The present invention be after the comparative study of composition, character and the existing processing scheme of existing printing and dyeing advanced treatment waste water being goed deep into system, finish to the purification of printing and dyeing advanced treatment waste water and the design of recycle usefulness technology, it is by the combination utilization of methods such as nano-catalytic electrolysis, precipitation, filtration, immersion ultrafiltration and electrodialysis, thereby forms a kind of purification and recycle method of the advanced treatment waste water that is particularly suitable for printing and dyeing.
Following embodiment will the present invention is further illustrated in conjunction with the accompanying drawings.
Referring to Fig. 1, a kind of printing and dyeing advanced treatment cycling utilization of wastewater devices and methods therefor embodiment of the present invention is provided with:
The nano-catalytic electrolytic system: the nano-catalytic electrolytic system is used for treatment steps such as nano-catalytic electrolysis, precipitation.The nano-catalytic electrolytic system is provided with stopping valve 11, working shaft 12, nano-catalytic electrolysis machine 13, setting tank 14; The external dyeing waste water of the import of stopping valve 11 (second pond) relief outlet, the import of working shaft 12 connects the outlet of stopping valve 11, and the import of rice catalytic electrolysis machine 13 is admitted in the outlet of working shaft 12, and the outlet of nano-catalytic electrolytic cell 13 connects the import of setting tank 14.
Submerged ultrafiltration filtering separation system: submerged ultrafiltration filtering separation system be used for nano-catalytic electrolytic system gained printing and dyeing purify liquid waste filtration, separate dialyzate and concentrated solution.Submerged ultrafiltration filtering separation system is provided with stopping valve 21, ultrafiltration membrane system 22, gas blower 23, aerator 24, submerged ultrafiltration pond 25, suction pump 26, stopping valve 27 and dialyzate basin 28; The outlet of rice catalytic electrolysis system setting tank 14 is admitted in the import of stopping valve 21, and the outlet of stopping valve 21 connects the import in submerged ultrafiltration pond 25, and the outlet in submerged ultrafiltration pond 25 enters dialyzate basin 28 through water pump 26, stopping valve 27 successively.
The ultra-filtration membrane cleaning system: the ultra-filtration membrane cleaning system is used to clean the ultrafiltration membrance filter separation system, is provided with cleaning fluid tank 31, backwashing pump 32, stopping valve 33.The outlet of cleaning fluid tank 31 connects the import of backwashing pump 32, and the outlet of backwashing pump 32 connects the import of stopping valve 33, and the outlet of stopping valve 33 connects ultrafiltration membrane system 22.
Electrodialysis system: electrodialysis system is provided with stopping valve 41, working shaft 42, electrodialysis machine 43, dialyzate basin 44, concentrated solution basin 45.The printing and dyeing of immersion ultrafiltration system gained are purified liquid waste and are entered electrodialysis machine 43 by stopping valve 41, working shaft 42, and the dialyzate outlet of electrodialysis machine 43 connects dialyzate basin 44, and the concentrated solution outlet of electrodialysis machine 43 connects concentrated solution basin 45.
Below provide the purifying regeneration and the recycle method of the dyeing waste water that adopts printing and dyeing advanced treatment wastewater device embodiment shown in Figure 1.
Embodiment 1
The purifying regeneration and the recycle method of 150 ton per days printing and dyeing advanced treatment waste water.
Index is as shown in table 1 after measured for described printing and dyeing advanced treatment waste water.
Table 1
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | 430 | 5 | Ammonia nitrogen | mg/ |
12 |
| 2 | SS | mg/L | 115 | 6 | Saltiness | ‰ | 6.6 |
| 3 | Turbidity | NTU | 9 | 7 | pH | ? | 8.1 |
| 4 | Colourity | ? | 70 | 8 | Specific conductivity | μS/cm | 2350 |
After 150 tons of printing and dyeing advanced treatment waste water are pressed the flow velocity extraction of 7.5T/h through working shaft 12, in the input nano-catalytic electrolysis machine 13, the nano-catalytic brine electrolysis directly enters setting tank 14, and post precipitation enters solid impurity, planktonic organism, bacterium, the colloid that the submergence ultrafiltration membrane system removes in anhydrating and must purify liquid waste.
The electrolytic operating voltage of described nano-catalytic is 8～9V, strength of current is 500～510A, chlorine [Cl], hydroxyl and the nascent oxygen [O] of the status nascendi that the nano-catalytic electrolysis produces, kill the organism in microorganism in the waste water, the oxygenolysis waste water, and after making suspended substance, colloid, charged corpuscle in the waste water under electric field action, form larger particles, system is removed through the submerged ultrafiltration filtering separation, makes purification of waste water, and measuring SDI is 1.9.
The process stopping valve 41 of purifying liquid waste of process nano-catalytic electrolysis cells and submerged ultrafiltration filtering separation system purification gained, working shaft 42 enter and carry out the electrodialytic desalting processing in the electrodialysis machine 43, be separated into dialyzate and concentrated solution, dialyzate enters dialyzate basin 44 through dialyzate outlet and pipeline, and concentrated solution enters in the concentrated solution basin 45 through concentrated solution outlet and pipeline.
Described electrodialysis system is pole-reversing electroosmosis system (EDR), and electrodialytic working conditions is operating voltage 0.5 ㎏/㎝
2, operating voltage 50～250V, strength of current 1～3A.
The flow velocity of described dialyzate and concentrated solution is respectively 6T/h and 1.5T/h, and the Wastewater Recovery rate is 80%, and the quality of reuse water is as shown in table 2, and the index that concentrates waste water is as shown in table 3.
Table 2
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | 29 | 5 | Colourity | ? | 1 |
| 2 | SS | mg/L | Do not detect | 6 | pH | ? | 6.7 |
| 3 | Turbidity | NTU | 1.2 | 7 | Specific conductivity | μS/cm | 400 |
| 4 | Ammonia nitrogen | mg/L | 0.1 | 8 | Saltiness | ‰ | 2.8 |
Table 3
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | 96 | 5 | Saltiness | ‰ | 1.8 |
| 2 | SS | mg/L | 35 | 6 | pH | ? | 8.5 |
| 3 | Turbidity | NTU | 2.5 | 7 | Specific conductivity | μS/cm | 3700 |
| 4 | Colourity | ? | 30 | 8 | Ammonia nitrogen | mg/L | 3 |
Embodiment 2
The purifying regeneration and the recycle method of 3000 ton per days printing and dyeing advanced treatment waste water.
Print and dye the after measured index of advanced treatment of dyeing wastewater of described printing and dyeing advanced treatment waste water is as shown in table 4:
Table 4
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | 156 | 5 | Saltiness | ‰ | 3.1 |
| 2 | SS | mg/L | 60 | 6 | pH | ? | 8.3 |
| 3 | Turbidity | NTU | 8 | 7 | Specific conductivity | μS/cm | 7100 |
| 4 | Colourity | ? | 200 | 8 | Ammonia nitrogen | mg/L | 3.7 |
Printing and dyeing advanced treatment waste water is after working shaft 12 is pressed the extraction of 150T/h flow velocity, in the input nano-catalytic electrolytic cell 13, the nano-catalytic brine electrolysis directly enters setting tank 14, neutralization precipitation after solid impurity, planktonic organism, bacterium, colloid that ultrafiltration membrane system 22 is removed in anhydrating must purify liquid waste.
Described printing and dyeing advanced treatment waste water is because saltiness is lower, add industrial sodium-chlor earlier its saltiness is adjusted to 12.5 ‰, and then carry out the nano-catalytic electrolysis, the electrolytic operating voltage of nano-catalytic is 5～6V, strength of current is 1560～1580A, the nano-catalytic electrolysis produces the chlorine [Cl] of status nascendi, hydroxyl and nascent oxygen [O], to kill microorganism in the waste water, organism in the oxygenolysis waste water, and make suspended substance in the waste water, colloid, charged corpuscle forms larger particles under electric field action after, removal is purified liquid waste water through submerged ultrafiltration filtering separation system, and measuring SDI is 1.6.
Carry out the electrodialytic desalting processing through purifying liquid waste of nano-catalytic electrolysis cells and submerged ultrafiltration filtering separation purification unit gained in the electrodialysis machine 43 through entering through stopping valve 41, working shaft 42, be separated into dialyzate and concentrated solution, dialyzate enters dialyzate basin 44 through dialyzate outlet and pipeline, and concentrated solution enters in the concentrated solution basin 45 through concentrated solution outlet and pipeline.
Described electrodialysis system is for filling electrodialysis system (EDI), and electrodialytic working conditions is operating voltage 3.0 ㎏/㎝
2, operating voltage 150～250V, strength of current 2～3A.
The flow velocity of described dialyzate and concentrated solution is respectively 105T/h and 45T/h, and the Wastewater Recovery rate is 70%, and the quality of reuse water is as shown in table 5, and the index that concentrates waste water is as shown in table 6.
Table 5
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | 19 | 5 | Ammonia ammonia | mg/L | Do not detect |
| 2 | SS | mg/L | Do not detect | 6 | pH | ? | 7.7 |
| 3 | Turbidity | NTU | 1 | 7 | Hardness | mmol/l | 1.1 |
| 4 | Colourity | ? | 1 | 8 | Specific conductivity | μS/cm | 490 |
Table 6
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | 75 | 5 | Saltiness | ‰ | 15.5 |
| 2 | SS | mg/L | 50 | 6 | pH | ? | 8.2 |
| 3 | Turbidity | NTU | 2.6 | 7 | Specific conductivity | μS/cm | 11200 |
| 4 | Colourity | ? | 8 | 8 | Ammonia nitrogen | mg/L | 1.9 |
Embodiment 3
The purifying regeneration and the recycle method of 6000 ton per days printing and dyeing advanced treatment waste water.
The purifying regeneration of described printing and dyeing advanced treatment waste water and recycle device, the index of the advanced treatment of dyeing wastewater of printing and dyeing after measured is as shown in table 7.
Table 7
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | 391 | 5 | Saltiness | ‰ | 0.9 |
| 2 | SS | mg/L | 190 | 6 | Colourity | ? | 80 |
| 3 | Turbidity | NTU | 8.4 | 7 | pH | ? | 7.7 |
| 4 | Ammonia nitrogen | mg/L | 7.9 | 8 | Specific conductivity | μS/cm | 3100 |
Printing and dyeing advanced treatment waste water is after working shaft 12 is pressed the extraction of 300T/h flow velocity, in the input nano-catalytic electrolytic cell 13, the nano-catalytic brine electrolysis directly enters setting tank 14, and post precipitation must be purified liquid waste through solid impurity, planktonic organism, bacterium, colloid that submerged ultrafiltration system 22 removes in anhydrating.
Described printing and dyeing advanced treatment waste water saltiness is lower, and the electrolytic operating voltage of nano-catalytic is 16～18V, and strength of current is 3760～3800A.Chlorine [Cl], hydroxyl and the nascent oxygen [O] of the status nascendi that the nano-catalytic electrolysis produces, kill the organism in microorganism in the waste water, the oxygenolysis waste water, and after making suspended substance, colloid, charged corpuscle in the waste water under electric field action, form larger particles, removal is purified liquid waste water through submerged ultrafiltration filtering separation system, and measuring SDI is 0.9.
Carry out the electrodialytic desalting processing through purifying liquid waste of nano-catalytic electrolysis cells and submerged ultrafiltration filtering separation purification unit gained in the electrodialysis machine 43 through entering through stopping valve 41, working shaft 42, be separated into dialyzate and concentrated solution, dialyzate enters dialyzate basin 44 through dialyzate outlet and pipeline, and concentrated solution enters in the concentrated solution basin 45 through concentrated solution outlet and pipeline.
Described electrodialysis system is bipolar electrodialysis system (EDMB), and electrodialytic working conditions is operating voltage 2.3 ㎏/㎝
2, operating voltage 190～250V, strength of current 2～3A.
The flow velocity of described dialyzate and concentrated solution is respectively 255T/h and 45T/h, and the Wastewater Recovery rate is 85%, and the quality of reuse water is as shown in table 8, and the index that concentrates waste water is as shown in table 9.
Table 8
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | 28 | 5 | Ammonia nitrogen | mg/L | 0.3 |
| 2 | SS | mg/L | Do not detect | 6 | pH | ? | 7.3 |
| 3 | Turbidity | NTU | 1.7 | 7 | Specific conductivity | μS/cm | 680 |
| 4 | Colourity | ? | 1 | 8 | Hardness | mmol/l | 1.3 |
Table 9
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | 83 | 5 | Saltiness | ‰ | 2.7 |
| 2 | SS | mg/L | 55 | 6 | pH | ? | 8.5 |
| 3 | Turbidity | NTU | 3 | 7 | Specific conductivity | μS/cm | 9500 |
| 4 | Colourity | ? | 30 | 8 | Ammonia ammonia | mg/L | 1.9 |
Above-mentioned only is the specific embodiment of the present invention, but design concept of the present invention is not limited thereto, and allly utilizes this design that the present invention is carried out the change of unsubstantiality, all should belong to the behavior of invading protection domain of the present invention.
Claims (14)
1. printing and dyeing advanced treatment cycling utilization of wastewater device, it is characterized in that: comprise nano-catalytic electrolytic system, submerged ultrafiltration filtering separation system, electrodialysis system, wherein nano-catalytic electrolytic system, submerged ultrafiltration filtering separation system are connected successively with electrodialysis system; Printing and dyeing advanced treatment waste water carries out nano-catalytic electrolysis, ultra-filtration filters, electrodialysis process through nano-catalytic electrolytic system, submerged ultrafiltration filtering separation system, electrodialysis system successively.
2. a kind of printing and dyeing advanced treatment cycling utilization of wastewater device as claimed in claim 1, it is characterized in that: also comprise the ultra-filtration membrane cleaning system, this ultra-filtration membrane cleaning system is connected with submerged ultrafiltration filtering separation system, and the ultra-filtration membrane of submerged ultrafiltration filtering separation system is cleaned.
3. a kind of printing and dyeing advanced treatment cycling utilization of wastewater device as claimed in claim 2 is characterized in that:
Described nano-catalytic electrolytic system is provided with stopping valve, working shaft, nano-catalytic electrolysis machine and setting tank; The external dyeing waste water relief outlet of the import of stopping valve, the import of working shaft connects the outlet of stopping valve, and the water supply pump outlet is admitted the import of rice catalytic electrolysis machine, and the outlet of nano-catalytic electrolysis machine connects the import of setting tank;
Described submerged ultrafiltration filtering separation system is provided with stopping valve, the submerged ultrafiltration pond, gas blower, aerator, ultrafiltration membrane system, suction pump and dialyzate basin, the printing and dyeing of nano-catalytic electrolytic system gained are purified liquid waste and are entered the submerged ultrafiltration pond by water inlet pipe and stopping valve, ultra-filtration membrane is immersed in during printing and dyeing in the submerged ultrafiltration pond purify liquid waste, suction pump is crossed membranous wall from the ultra-filtration membrane inboard with the water negative pressure-pumping, the dialyzate that produces is collected the dialyzate basin by suction pump and is used for further getting the reuse water of recycle through osmosis filtration, the outlet of rice catalytic electrolysis system setting tank is admitted in the import of stopping valve, the outlet of stopping valve connects the import in submerged ultrafiltration pond, and suction pump is passed through in the outlet in submerged ultrafiltration pond successively, stopping valve enters the dialyzate basin;
Described ultra-filtration membrane cleaning system is provided with cleaning fluid tank, backwashing pump, stopping valve and duct coupling, and the outlet of cleaning fluid tank connects the import of backwashing pump, and the back flushing pump outlet connects the import of stopping valve, and the outlet of stopping valve connects ultrafiltration membrane system;
Described electrodialysis system is provided with stopping valve, working shaft, electrodialysis machine, dialyzate basin, concentrated solution basin, the import of stopping valve connects the outlet of the dialyzate basin of submerged ultrafiltration filtering separation system, the outlet of stopping valve connects the import of working shaft, the water supply pump outlet connects the import of electrodialysis machine, the dialyzate outlet of electrodialysis machine connects the dialyzate basin, and electrodialytic concentrated solution outlet connects the concentrated solution basin.
4. a kind of printing and dyeing advanced treatment cycling utilization of wastewater device as claimed in claim 1 is characterized in that: described electrodialysis system is pole-reversing electroosmosis system (EDR), liquid film electrodialysis system (EDLM), fill electrodialysis system (EDI), bipolar electrodialysis system (EDMB) and electrodeless water power dialysis system a kind of.
5. a printing and dyeing advanced treatment cycling utilization of wastewater method is characterized in that, adopts a kind of printing and dyeing advanced treatment cycling utilization of wastewater device as claimed in claim 1, and may further comprise the steps:
Step 1, nano-catalytic electrolysis: will be after water pump extracts through the printing and dyeing advanced treatment waste water of second pond after the biochemical treatment, carry out the nano-catalytic electrolysis in the input nano-catalytic electrolysis machine, enter the setting tank precipitation through valve again, import filtration unit then and filter, remove the solid impurity, planktonic organism, bacterium, the colloid that produce because of the nano-catalytic electrolysis in the waste water and must purify liquid waste.
6. step 2, immersion ultra-filtration filters: the purification dyeing waste water after will handling through nano-catalytic electrolytic system system flows into immersion ultrafiltration system filtration treatment, the water of must dialysing through pipeline.
7. step 3, electrodialysis: will send into electrodialysis system through working shaft through the purification dyeing waste water of immersion ultrafiltration system processing gained, and carry out electrodialytic desalting, and get de-salted water and concentrated solution.
8. a kind of printing and dyeing advanced treatment cycling utilization of wastewater method as claimed in claim 5, it is characterized in that: the operating voltage of the electrolytic two neighboring pole plate of described nano-catalytic is 2～18V, and operating voltage is preferably 3～8V.
9. a kind of printing and dyeing advanced treatment cycling utilization of wastewater method as claimed in claim 5, it is characterized in that: the electrolytic current density of described nano-catalytic is 10～300mA/cm
2, current density is preferably 50～210 mA/cm
2
10. a kind of printing and dyeing advanced treatment cycling utilization of wastewater method as claimed in claim 5, it is characterized in that: the sodium chloride content of described dyeing waste water is 0.6%～5.0%.
11. a kind of printing and dyeing advanced treatment cycling utilization of wastewater method as claimed in claim 5, it is characterized in that: the sodium chloride content of described dyeing waste water is 0.6%～1.3%.
12. a kind of printing and dyeing advanced treatment cycling utilization of wastewater method as claimed in claim 5, it is characterized in that: described ultrafiltration membrance filter is a submerged ultrafiltration filtering separation system, and working conditions is: normal temperature～45 ℃, operating pressure is 1～50kPa.
13. a kind of printing and dyeing advanced treatment cycling utilization of wastewater method as claimed in claim 5 is characterized in that: the working conditions of described electrodialysis system is operating voltage 0.5～3.0 ㎏/㎝
2, operating voltage 50～250V, strength of current 1～3A.
14. a kind of printing and dyeing advanced treatment cycling utilization of wastewater method as claimed in claim 5 is characterized in that: described electrodialysis system is a kind of of one section electrodialysis system, two sections electrodialysis systems, three sections electrodialysis systems and four sections electrodialysis systems.
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