CN203238142U - Regeneration and recycle device for papermaking advanced treatment wastewater - Google Patents
Regeneration and recycle device for papermaking advanced treatment wastewater Download PDFInfo
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- CN203238142U CN203238142U CN 201320271557 CN201320271557U CN203238142U CN 203238142 U CN203238142 U CN 203238142U CN 201320271557 CN201320271557 CN 201320271557 CN 201320271557 U CN201320271557 U CN 201320271557U CN 203238142 U CN203238142 U CN 203238142U
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Abstract
The utility model relates to a regeneration and recycle device for papermaking advanced treatment wastewater. The regeneration and recycle device is characterized by comprising a chemical demineralization system, a multi-media filtration system, an electrolysis system, a biological aerated filter (BAF), an ultrafiltration systems and a reverse osmosis system. The regeneration and recycle device for papermaking advanced treatment wastewater overcomes the defect of too high cost caused by single membrane filtration separation or adsorption treatment, and also overcomes the defects that the conventional papermaking wastewater treatment method has no satisfactory treatment effects, the environment is polluted by drained wastewater and the like; 70% to 85% of treated papermaking advanced treatment wastewater can be regenerated and recycled, so that the wastewater drainage is reduced to avoid wastewater from polluting the environment, the water resource waste is reduced, and the regenerated recycled water price is lower than the tap water price, and thus the device is economic and reasonable, and better economic benefits are obtained.
Description
Technical field
The utility model relates to the treatment unit that a kind of papermaking deep is processed waste water, particularly relates to a kind of recycling utilization device of processing waste water based on the papermaking deep of chemical decalcification technology, electrochemical techniques and membrane technique.
Background technology
Paper-making effluent refers to the cooking waste liquor (claiming again black liquor, red liquid) that chemical pulping produces, the plain boiled water that produces in the middle section water that produces in the pulp washing bleaching process and the machine hand's order.General every production 1t sulfate pulp just has 1t organism and 400kg bases, sulfide to be dissolved in the black liquor; Producing the 1t sulfite pulp has 900kg organism and 200kg oxide compound (calcium, magnesium etc.) to be dissolved in the red liquid with sulfide approximately.Waste liquid enters in the rivers not only severe contamination water source, and causes a large amount of wastings of resources.Paper-making industry is traditional water rich and influential family, also is one of important source of pollution that cause the water pollution.At present, the first place that China's paper-making industrial waste water quantity discharged and COD quantity discharged all occupy China's all types of industries quantity discharged, paper industry is the most serious to the pollution of water surrounding, it is the matter of utmost importance of China's industrial pollution caused by paper manufacturing control still not, also is the matter of utmost importance that national trade effluent carries out processing up to standard and water saving.According to statistics, the above papermaking in China county and county and paper products industry wastewater discharge account for 18.6% of national industrial total release, wherein process the emission compliance amount and account for 49.3% of paper-making industrial waste water total release, COD accounts for 44.0% of national industrial COD total release in the waste discharge.Therefore, how eliminating that paper waste pollutes and make precious resources in the waste liquid obtain utilizing is the work with great social effect and economic worth, should attach great importance to.Along with expanding economy, China faces the problem of shortage of fresh water, scarcity of raw material day by day, and on the other hand, water pollutes also more and more serious.In recent years, through in many ways unremitting effort, the paper industry water prevention and cure of pollution have obtained certain achievement, although paper and paperboard production increase year by year, the COD in the waste discharge is reduced year by year but.But at present the paper industry waste water that accounts for total emission volumn 50% not yet carries out processing up to standard, and recycling was few especially after paper waste was processed, therefore, and paper waste prevention and cure of pollution and to recycle task also quite heavy.
The paper waste complicated component, biodegradability is poor, belongs to more unmanageable trade effluent, and its source and characteristics are:
1, cooking section waste liquid
Be the black liquor of alkaline process generation and the red liquid that acid polishing produces.Overwhelming majority paper mill is adopted alkaline process and is produced black liquor.Contained pollutent has accounted for more than 90% of industrial pollution caused by paper manufacturing total emission volumn in the black liquor, and has the characteristic of high density and difficult degradation, and its improvement is a great problem always.Main component in the black liquor has 3 kinds, i.e. xylogen, poly-pentose and total alkali.Xylogen is the nontoxic natural high molecular substance of a class, has widely purposes as industrial chemicals, and poly-pentose can be used as animal feed.
2, middle section water
Effluent refers to the waste water of discharging through the boiling slurry after the black liquid extraction in the processes such as screening, washing, bleaching, color is deep yellow, accounts for 8%～9% of industrial pollution caused by paper manufacturing total emission volumn, about ton slurry COD load 310kg.Middle section water concentration is higher than sanitary sewage, and the ratio of BOD and COD is between 0.20 to 0.35, and biodegradability is relatively poor, and organism is difficult to biological degradation and intractability is large.Organism in the middle section water mainly is xylogen, Mierocrystalline cellulose, organic acid etc., take solubility COD as main.Wherein, what environmental pollution was the most serious is the chlorine-contained wastewater that produces in the bleaching process, such as Chlorinated Bleaching waste water, hypo(chlorite)bleaching waste water etc.Hypo(chlorite)bleaching waste water mainly contains trichloromethane, also contains other organic chlorides of kind more than 40, wherein take various chlorinated phenols as at most, such as dichloro-phenol, three chlorinated phenols etc.In addition, contain toxic extremely strong carcinogenic substance Dioxins in the bleaching waste liquor, ecotope and HUMAN HEALTH have been caused serious threat.
3, plain boiled water
Plain boiled water is machine hand's section waste water, and it derives from the paper machine room paper making process.Plain boiled water mainly contains fiber fines, filler, coating and lysed timber composition, and the sizing material that adds, Wet Strength Resin, sanitas etc., and take insoluble COD as main, biodegradability is lower, and the sanitas of its adding has certain toxicity.The plain boiled water water yield is larger, but its contained organic pollution load is well below black digestion liquid and middle-stage wastewater.Nearly all paper mill paper machine room has all adopted part or totally-enclosed system to reduce the papermaking water loss now, saves power consumption, improves the plain boiled water reclamation rate, reduces unnecessary plain boiled water discharging.
At present, be used for the method that paper waste processes and mainly contain: physical filtering method, coagulant sedimentation, absorption method, advanced oxidation processes, By Bubble-floating Method, acid adding absorption process, catalytic oxidation, biochemical process etc., every kind of method all have relative merits separately.Because single treatment process is difficult to be effective, in practice, normally according to the practical situation that will process waste water, several method is combined with, typical production technique be with paper waste through physical treatment such as filtrations grade, then pass through behind the flocculation sediment again qualified discharge after biochemical treatment.
Chinese patent CN101708927A discloses a kind of advanced treatment method for papermaking waste water of investing little, that technique is simple, pollutants removal rate is high, working cost is cheap oxidative degradation+flocculation sediment+sand filtration.COD＜70mg/L after the method is processed, BOD5＜20mg/L, SS＜30mg/L.
Ecological Disposal and resource recycling that Chinese patent CN1420091 discloses a kind of paper waste utilize method, and it is to utilize ecological engineering technology, and paper mill wastewater carries out BOD in settling tank
5: COD
CrThe ratio adjustment, then enter the digestion of series connection anaerobic pond and facultative lagoon, COD is carried out in draining in equalizing tank
Cr: N: after P ratio is adjusted, be distributed into many groups rainwash wetland in parallel by the transmission ﹠ distribution water system, water outlet is better than the primary standard of paper industry Sewage Water Emissions, can stay through the storage of the aerobic pool, replenish the required clear water of equalizing tank, is back to the rainwash wetland and carries out the degree of depth and process.The method has overcome paper waste trophic structure imbalance, the poor shortcoming of biodegradability, can stablize the Ecological Disposal and the resource recycling utilization that effectively realize paper waste.
Chinese patent CN101337752 discloses a kind of advanced treatment process for paper-making waste water, this technique may further comprise the steps: the paper waste after secondary biochemical treatment is introduced little aeration iron reduction bed, load iron filings in little aeration iron reduction bed, paper waste carries out reduction reaction in little aeration iron reduction bed; Water outlet after 1. step processed is introduced in the coagulation basin, adds coagulating agent and coagulant aids in coagulation basin, impels the particle aggregation in the water; Water outlet after 2. step processed is introduced in the settling tank and is carried out mud-water separation; Filter in the water outlet introducing filtering basin with settling tank, the water outlet after the filtration is introduced the reuse water pipe network behind sterilization and disinfection; Mud in the settling tank and the sewage backwash water in the filtering basin are introduced sludge thickener, and outward transport is disposed after dehydration; Simultaneously, the overflowing liquid in dehydration filtrate and the sludge thickener is introduced in the coagulation basin and is processed.The utility model technique is simple, good decolorizing effect and with low cost.
Above method all obtains reasonable effect to the processing of paper waste, but all exist the processing degree of depth inadequate, the middle water of producing also contains more pollutent, can only be fit to some production technique not high to the water specification of quality, and its purposes consumption all is restricted.Make paper waste regeneration, satisfy the water requirement of various processes, the particularly requirement of high quality water, must carry out deep purifying to it and process, as the waste water of biochemical gained is processed through membrane filtration through further purifying, obtain pure water again.Chinese patent 201010567041.0,201020635352.1 has been introduced papermaking deep and has been processed the method that waste water employing membrane filtration carries out recycling utilization, but in implementation process, find that calcium ion content is up to 150～400 mg/L in the paper waste, produce a large amount of foulings, the regeneration of waste water is caused serious difficulty.
The utility model content
The purpose of this utility model is for existing cost is higher in the existing paper waste treatment process, usefulness is lower, waste water after processing mostly is discharging, does not have the problems such as advanced treatment recycle, waste water resource, providing a kind of combines with membrane technique based on chemical decalcification technology, electrochemical techniques, cost is lower, usefulness is higher, and the papermaking deep that makes it to reach recycle is processed the recycling utilization device of waste water.
The recycling utilization device that a kind of papermaking deep described in the utility model is processed waste water is provided with chemical decalcification system, multi-medium filtering system, electrolytic system, BAF (BAF), ultrafiltration system and reverse osmosis system;
The chemistry decalcification system is used for removing papermaking deep and processes the calcium magnesium of waste water, reduces water hardness, the chemistry decalcification system is provided with coagulation basin, stopping valve and tube settler, coagulation basin connects with the import of stopping valve, the outlet of stopping valve connects the import of tube settler, and the outlet of tube settler connects the import of multi-medium filtering system; Coagulation basin in the described chemical decalcification system is provided with dispensing system and medicine system.
The multi-medium filtering system is used for the waste water after the chemical decalcification is carried out filtering separation, and the multi-medium filtering system is provided with stopping valve, working shaft, more medium filter, backwashing pump and cleaning fluid tank; The import of stopping valve connects the outlet of chemical decalcification system, the import of working shaft connects the outlet of stopping valve, the water supply pump outlet connects the import of more medium filter, and the outlet one tunnel of more medium filter connects with electrolytic system, and another road connects cleaning fluid tank through backwashing pump successively.
Electrolytic system is used for electrolysis treatment is carried out in the water outlet after the multi-medium filtering separation, and electrolytic system is provided with stopping valve, working shaft and electrolysis machine; The external multi-medium filtering system offtake of the import of stopping valve, the import of working shaft connects the outlet of stopping valve, and the water supply pump outlet connects the import of electrolysis machine, and the outlet of electrolysis machine connects with the import of BAF (BAF).
Electrolysis machine is provided with power supply and electrolyzer in the described electrolytic system; Electrode materials in the described electrolyzer is a kind of in graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, alloy and the nano-catalytic inert material, the top layer of described nano-catalytic noble electrode is coated with the metal oxide inertia catalyst coatings that crystal grain is 10～35nm, and the substrate of described nano-catalytic noble electrode is titanium plate or plastic plate.
BAF (BAF) is carried out fast purification by the oxidation degradation effect to waste water, obtaining papermaking purifies liquid waste, BAF is provided with stopping valve, working shaft, water distribution system, the pond body, filler, gas blower, stopping valve, scavenging pump, water storing tank, the import of stopping valve connects the outlet of electrolytic system, the import of working shaft connects the outlet of stopping valve, the water supply pump outlet connects the import of water distribution system, water distribution system is positioned at body bottom, pond, filler is positioned at body middle part, pond, gas blower is pond body aeration from pond body bottom, the water outlet one tunnel on body top, pond connects with water storing tank, and another road is successively through scavenging pump, stopping valve connects water storing tank.
Ultrafiltration system be used for the papermaking of BAF gained purify liquid waste filtration, separate to get water-dialyzing and condensed water.Ultrafiltration system is provided with stopping valve, working shaft, ultrafiltration membrane system, backwashing pump, water-dialyzing basin and valve, the import of stopping valve connects the outlet of BAF, the outlet of stopping valve connects the import of working shaft, the water-dialyzing that the water supply pump outlet connects outlet, the ultrafiltration membrane system of ultrafiltration membrane system exports one the tunnel and connects the water-dialyzing basin, another road connects the water-dialyzing basin through backwashing pump, and the condensed water of ultrafiltration membrane system is then through the recycle to the electrolytic system of pipeline and valve return.
Described ultrafiltration system also comprises the ultra-filtration membrane chemical cleaning system, the ultra-filtration membrane chemical cleaning system is used for cleaning the hyperfiltration membrane assembly of ultrafiltration system, the ultra-filtration membrane chemical cleaning system is provided with cleaning fluid tank, chemical cleaning pump and stopping valve, the outlet of cleaning fluid tank connects the import of chemical cleaning pump, and the matting pump outlet connects ultrafiltration membrane system through stopping valve.
Described ultrafiltration system is a kind of of immersion ultrafiltration, pillar ultrafiltration, tubular type ultrafiltration, spiral wound or plate-type hyperfiltration, molecular weight cut-off is 1000～100000MWCO, working conditions is: normal temperature～45 ℃, the operating pressure of immersion ultrafiltration is-1～-50kPa, the operating pressure of pillar ultrafiltration, tubular type ultrafiltration, spiral wound and plate-type hyperfiltration is 3～300kPa.
Reverse osmosis system pumps into reverse osmosis membrane assembly with high-pressure pump with ultrafiltration system gained water-dialyzing after security personnel filter, separate to get water-dialyzing and condensed water through reverse osmosis membrane filtration, and water-dialyzing enters basin and gets reuse water; A condensed water part is separated the redundance discharging through the reflux membrane filtration that circulates of condensed water topping-up pump; Reverse osmosis system is provided with stopping valve, working shaft, cartridge filter, high-pressure pump, reverse osmosis membrane assembly and reuse water basin, the import of stopping valve connects the outlet of ultrafiltration system, the outlet of stopping valve enters reverse osmosis membrane assembly through working shaft, cartridge filter and high-pressure pump successively, and the water-dialyzing outlet of reverse osmosis membrane assembly connects the import of reuse water basin;
Described reverse osmosis system also comprises the reverse osmosis concentration water reclamation system, reverse osmosis concentration moisture film recovery system is for the system that the condensed water of reverse osmosis membrane filtration is recycled, the reverse osmosis concentration water reclamation system is provided with backflow condensed water topping-up pump, valve and stopping valve, the import of backflow condensed water topping-up pump connects the condensed water outlet of reverse osmosis system, and the outlet of backflow condensed water topping-up pump connects reverse osmosis membrane assembly;
Described reverse osmosis system also comprises a reverse osmosis membrane cleaning and regeneration system, reverse osmosis membrane cleaning and regeneration system is used for cleaning reverse osmosis membrane assembly, reverse osmosis membrane cleaning and regeneration system is provided with cleaning fluid tank, backwashing pump, stopping valve and valve, the import of cleaning fluid tank connects the outlet of reverse osmosis membrane assembly water-dialyzing through stopping valve, one way outlet of cleaning fluid tank connects the outlet of reverse osmosis system condensed water through stopping valve and valve, and another way outlet of cleaning fluid tank connects the working shaft outlet through backwashing pump.
Reverse osmosis membrane assembly in the described reverse osmosis system is rolled membrane module, and mould material is cellulose acetate film or composite membrane in the organic membrane, and the molecular weight cut-off of mould material is 50～200MWCO, and entrance pressure can be 6.0～45.0bar, goes out to press to can be 4.5～33.5 bar.
The utility model had both overcome the defective of alone membrane filtration separating treatment or adsorption treatment high cost, the treatment effect that has overcome again conventional paper waste method is undesirable, the defectives such as contaminated wastewater environment of discharging are processed purification of waste water and recycle and reuse with existing papermaking deep.Compared with the prior art, have following outstanding advantages:
(1) papermaking deep is processed waste water through processing, and 70%～85% can recycling utilization, has both reduced discharge of wastewater, avoid the waste water environmental pollution, reduce again water resource waste, can also make the recirculated water cost of regeneration be lower than the tap water price, economical rationality produces preferably economic benefit.
(2) but process high-concentration Ca magnesium ion in the waste water by chemical decalcification system effective elimination papermaking deep, clearance reaches 50%, guarantee subsequent treatment process smoothly, steady running.
(3) further reduce COD by the nano-catalytic electrolysis, the one, the reuse of wastewater rate is improved, both reduced discharge of wastewater, avoid the waste water environmental pollution, reduce again water resource waste; The 2nd, can kill the microorganisms such as bacterium in the waste water, eradicate the biological pollution of subsequent ultrafiltration film and reverse osmosis membrane, significantly reduce the wash number of ultra-filtration membrane and reverse osmosis membrane, reduce film cleaning regeneration cost, improve the service efficiency of film, prolong the work-ing life of film, reduce the film replacement cost.
(4) the water consumption index of decrease ton paper and discharge of wastewater index improve the business economic technical indicator.
The alleged papermaking deep of the utility model is processed waste water and is referred to that paper waste through second pond water outlet after traditional filtration, flocculation and the biochemical treatment, namely reaches the waste water of emission standard more than three grades.
Description of drawings
Fig. 1 is that the structure of the recycling utilization device embodiment of a kind of papermaking deep processing of the utility model waste water forms synoptic diagram.
Embodiment
The utility model be after composition, character and the existing processing scheme of existing papermaking deep being processed waste water are goed deep into the comparative study of system, finish to the purification of papermaking deep processed waste water and the design of recycling utilization device, it is comprised of chemical decalcification system, multi-medium filtering system, electrolytic system, BAF (BAF), ultrafiltration system and reverse osmosis system etc.
Following embodiment is further described the utility model in connection with accompanying drawing.
Referring to Fig. 1, the recycling utilization device embodiment that a kind of papermaking deep described in the utility model is processed waste water is provided with:
The chemistry decalcification system: chemical decalcification system is used for removing papermaking deep and processes the calcium magnesium of waste water, reduces water hardness, the chemistry decalcification system is provided with coagulation basin 11, stopping valve 12 and tube settler 13, coagulation basin 11 connects with the import of stopping valve 12, the outlet of stopping valve 12 connects the import of tube settler 13, and the outlet of tube settler 13 connects the import of multi-medium filtering system;
The multi-medium filtering system: the multi-medium filtering system is used for the waste water after the chemical decalcification is carried out filtering separation, and the multi-medium filtering system is provided with stopping valve 21, working shaft 22, more medium filter 23, stopping valve 24, backwashing pump 25 and cleaning fluid tank 26; The import of stopping valve 21 connects the outlet of chemical decalcification system, the import of working shaft 22 connects the outlet of stopping valve 21, the outlet of working shaft 22 connects the import of more medium filter 23, and the outlet one tunnel of more medium filter 23 connects with electrolytic system, and another road connects cleaning fluid tank 25 through backwashing pump 24 successively;
Electrolytic system: electrolytic system is used for electrolysis treatment is carried out in the water outlet after the multi-medium filtering separation, and electrolytic system is provided with stopping valve 31, working shaft 32 and electrolysis machine 33; The external multi-medium filtering system offtake of the import of stopping valve 31, the import of working shaft 32 connects the outlet of stopping valve 31, and the outlet of working shaft 32 connects the import of electrolysis machine 33, and the outlet of electrolysis machine 33 connects with the import of BAF;
BAF (BAF): BAF is carried out fast purification by the oxidation degradation effect to waste water, obtaining papermaking purifies liquid waste, BAF is provided with stopping valve 41, working shaft 41, water distribution system 43, pond body 44, gas blower 45, filler 46, scavenging pump 47, stopping valve 48, water storing tank 49, the import of stopping valve 41 connects the outlet of electrolytic system, the import of working shaft 42 connects the outlet of stopping valve 41, the outlet of working shaft 42 connects the import of water distribution system 43, water distribution system 43 is positioned at pond body 44 bottoms, filler 46 is positioned at pond body 44 middle parts, gas blower 45 is pond body 44 aerations from pond body 44 bottoms, the water outlet one tunnel on pond body 44 tops connects with water storing tank 49, and another road is successively through scavenging pump 47, stopping valve 48 connects water storing tank 49;
Ultrafiltration system: ultrafiltration system be used for the papermaking of BAF gained purify liquid waste filtration, separate to get water-dialyzing and condensed water.Ultrafiltration system is provided with stopping valve 51, working shaft 52, ultrafiltration membrane system 53, backwashing pump 54, stopping valve 55, water-dialyzing basin 56 and valve 57, the import of stopping valve 51 connects the outlet of BAF, the outlet of stopping valve 51 connects the import of working shaft 52, the water-dialyzing that the outlet of working shaft 52 connects outlet, the ultrafiltration membrane system 53 of ultrafiltration membrane system 53 exports one the tunnel and connects water-dialyzing basin 56, another road connects water-dialyzing basin 56 through backwashing pump 54, stopping valve 55 successively, and the condensed water of ultrafiltration membrane system 53 then is back in the electrolytic system through valve 57 and reuses.
Ultrafiltration system also comprises the ultra-filtration membrane chemical cleaning system, the ultra-filtration membrane chemical cleaning system is used for cleaning the hyperfiltration membrane assembly of ultrafiltration system, the ultra-filtration membrane chemical cleaning system is provided with cleaning fluid tank 61, chemical cleaning pump 62 and stopping valve 63, the outlet of cleaning fluid tank 61 connects the import of chemical cleaning pump 62, and the outlet of chemical cleaning pump 62 connects ultrafiltration membrane system 53 through stopping valve 63;
Reverse osmosis system: reverse osmosis system pumps into reverse osmosis membrane assembly with high-pressure pump with ultrafiltration system gained water-dialyzing after security personnel filter, separate to get water-dialyzing and condensed water through reverse osmosis membrane filtration, and water-dialyzing enters basin and gets reuse water; A condensed water part is separated through the reflux membrane filtration that circulates of condensed water topping-up pump, and a part refluxes and enters electrolytic system and recycle the redundance discharging; Reverse osmosis system is provided with stopping valve 71, working shaft 72, stopping valve 73, cartridge filter 74, film system high pressure pump 75, reverse osmosis membrane assembly 76, stopping valve 77 and reuse water basin 78.The import of stopping valve 71 connects the outlet of ultrafiltration system water-dialyzing basin 56, the outlet of stopping valve 71 enters reverse osmosis membrane assembly 76 through working shaft 72, stopping valve 73, cartridge filter 74 and film system high pressure pump 75 successively, and the water-dialyzing outlet of reverse osmosis membrane assembly 76 connects the import of reuse water basin 78 through stopping valve 77;
The reverse osmosis concentration water reclamation system: the reverse osmosis concentration water reclamation system is for the system that the reverse osmosis membrane filtration condensed water is carried out reuse.Osmosis filtration film recovery system is provided with backflow condensed water topping-up pump 81.The import of backflow condensed water topping-up pump 81 connects the condensed water outlet of reverse osmosis membrane assembly 76, and the outlet of backflow condensed water topping-up pump 81 connects the import of reverse osmosis membrane assembly 76;
Reverse osmosis membrane cleaning and regeneration system: reverse osmosis membrane cleaning and regeneration system is used for cleaning reverse osmosis membrane assembly, and reverse osmosis membrane cleaning and regeneration system is provided with stopping valve 91, cleaning fluid tank 92, stopping valve 93, stopping valve 94, backwashing pump 95, stopping valve 96 and valve 97.The import of cleaning fluid tank 92 connects the outlet of reverse osmosis membrane assembly 76 water-dialyzings through stopping valve 91, one way outlet of cleaning fluid tank 92 connects the outlet of reverse osmosis membrane assembly 76 condensed water through stopping valve 93, valve 97, and another way outlet of cleaning fluid tank 92 connects working shaft 72 outlets through stopping valve 94 by backwashing pump 95 and stopping valve 96.
Provide the specific embodiment that a kind of papermaking deep is processed the recycling utilization device of waste water below in conjunction with Fig. 1.
Embodiment 1
500 ton per day papermaking deeps are processed the recycling utilization method of waste water.
It is as shown in table 1 after measured that described papermaking deep is processed the waste water quality index.
Table 1 papermaking deep is processed the water-quality guideline of waste water
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | 150 | 4 | Colourity | 60 | |
| 2 | SS | mg/L | 140 | 5 | Ca | mg/L | 200 |
| 3 | Specific conductivity | μS/cm | 1800 | 6 | Hardness | mmol/L | 4 |
(1) chemical decalcification
Papermaking deep is processed waste water and is flowed into coagulation basin through pipeline, under agitation adds first an amount of saturated lime solution adjust pH to 8.5 by chemicals dosing plant in coagulation basin, adds the Na of 600mg/L again
2CO
3, then add the FeSO of 10mg/L
4, add again Na
2CO
3Anti-adjust pH to 8, the polyphenyl alkene acid amides (PAM) that adds at last 2mg/L, enter tube settler after reacting completely, carry out precipitate and separate, thereby remove calcium magnesium, reduction water hardness in the papermaking deep processing waste water, throw out (being mud) is sent in the sludge sump through pump and pipeline, carries out at last filtering separation in sludge dehydration device, and recovery calcium carbonate, waste water then enters next step and filters;
(2) filter
Waste water after the chemical decalcification is pumped into more medium filter carry out filtering separation, further except SS and colloid in anhydrating;
(3) electrolysis
Waste water after filtering is pumped into the electrolysis machine electrolysis, and the degraded organic macromolecule removes colourity, and improves the biodegradability of waste water, and adjacent two interelectrode voltages of electrolysis machine are 2V, and current density is 10mA/cm
2
(4) BAF is biochemical
Waste water after the electrolysis enters BAF, by the oxidation degradation effect waste water is carried out fast purification, obtains papermaking and purifies liquid waste;
(5) ultrafiltration
The biochemical gained papermaking of BAF purified liquid waste carry out the immersion ultra-filtration filters, separate to get water-dialyzing and condensed water, water-dialyzing enters reverse-osmosis treated, and condensed water flow to recycle in the electrolysis machine through back of pipeline;
(6) reverse osmosis
Ultrafiltration gained water-dialyzing pumps into reverse osmosis membrane assembly with high-pressure pump after security personnel filter, separate to get water-dialyzing and condensed water through reverse osmosis membrane filtration, and water-dialyzing enters basin and gets reuse water; A condensed water part is separated the redundance discharging through the reflux membrane filtration that circulates of condensed water topping-up pump.
Described immersion ultrafiltration working conditions is: normal temperature～45 ℃, operating pressure are-1～-50kPa; The membrane module of described reverse osmosis is rolled membrane module, and mould material is cellulose acetate film in the organic membrane, and entrance pressure can be 6.0～45.0bar, goes out to press to can be 4.5～33.5 bar.
Above-mentioned ultrafiltration is the immersion ultrafiltration.Ultrafiltration can be a kind of of immersion ultrafiltration, pillar ultrafiltration, tubular type ultrafiltration, spiral wound or plate-type hyperfiltration.
The reuse water water-quality guideline is as shown in table 2 after measured.
The water-quality guideline of table 2 reuse water
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | 10 | 4 | Colourity | 10 | |
| 2 | SS | mg/L | ≤1 | 5 | Ca | mg/L | ≤1 |
| 3 | Specific conductivity | μS/cm | 100 | 6 | Hardness | mmol/L | 0.1 |
Embodiment 2
6000 ton per day papermaking deeps are processed the recycling utilization method of waste water.
It is as shown in table 3 after measured that described papermaking deep is processed the waste water quality index.
Table 3 papermaking deep is processed the water-quality guideline of waste water
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | 90 | 4 | Colourity | 150 | |
| 2 | SS | mg/L | 60 | 5 | Ca | mg/L | 160 |
| 3 | Specific conductivity | μS/cm | 1200 | 6 | Hardness | mmol/L | 2 |
(1) chemical decalcification
Papermaking deep is processed waste water and is flowed into coagulation basin through pipeline, under agitation adds first an amount of saturated lime solution adjust pH to 9.5 by chemicals dosing plant in coagulation basin, adds the Na of 300mg/L again
2CO
3, then add the FeSO of 5mg/L
4, add again Na
2CO
3Anti-adjust pH to 9, the polyphenyl alkene acid amides (PAM) that adds at last 2mg/L, enter tube settler after reacting completely, carry out precipitate and separate, thereby remove calcium magnesium, reduction water hardness in the papermaking deep processing waste water, throw out (being mud) is sent in the sludge sump through pump and pipeline, carries out at last filtering separation in sludge dehydration device, and recovery calcium carbonate, waste water then enters next step and filters;
(2) filter
Waste water after the chemical decalcification is pumped into the sand filtration strainer carry out filtering separation, further except SS and colloid in anhydrating;
(3) electrolysis
Waste water after the sand filtration filtration is pumped into the electrolysis machine electrolysis, and the degraded organic macromolecule removes colourity, and improves the biodegradability of waste water, and adjacent two interelectrode voltages of electrolysis machine are 6V, and current density is 320mA/cm
2
(4) BAF is biochemical
Waste water after the electrolysis enters BAF, by the oxidation degradation effect waste water is carried out fast purification, obtains papermaking and purifies liquid waste;
(5) ultrafiltration
The biochemical gained papermaking of BAF purified liquid waste carry out the pillar ultra-filtration filters, separate to get water-dialyzing and condensed water, water-dialyzing enters reverse-osmosis treated, and condensed water flow to recycle in the electrolysis machine of step (2) through back of pipeline.
(6) reverse osmosis
Ultrafiltration gained water-dialyzing pumps into reverse osmosis membrane assembly with high-pressure pump after security personnel filter, separate to get water-dialyzing and condensed water through reverse osmosis membrane filtration, and water-dialyzing enters basin and gets reuse water; A condensed water part is separated the redundance discharging through the reflux membrane filtration that circulates of condensed water topping-up pump.
Described tubular type ultrafiltration working conditions is: normal temperature～45 ℃, and operating pressure is 3～300kPa; The membrane module of described reverse osmosis is rolled membrane module, and mould material is composite membrane, and entrance pressure can be 6.0～45.0bar, goes out to press to can be 4.5～33.5 bar.
Above-mentioned ultrafiltration is the tubular type ultrafiltration.Ultrafiltration can be a kind of of immersion ultrafiltration, pillar ultrafiltration, tubular type ultrafiltration, spiral wound or plate-type hyperfiltration.
The reuse water water-quality guideline is as shown in table 4 after measured.
The water-quality guideline of table 4 reuse water
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | 6 | 4 | Colourity | 5 | |
| 2 | SS | mg/L | ≤1 | 5 | Ca | mg/L | ≤1 |
| 3 | Specific conductivity | μS/cm | 80 | 6 | Hardness | mmol/L | 0.05 |
Embodiment 3
20000 ton per day papermaking deeps are processed the recycling utilization method of waste water.
It is as shown in table 5 after measured that described papermaking deep is processed the waste water quality index.
Table 5 papermaking deep is processed the water-quality guideline of waste water
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | 120 | 4 | Colourity | 80 | |
| 2 | SS | mg/L | 120 | 5 | Ca | mg/L | 200 |
| 3 | Specific conductivity | μS/cm | 1500 | 6 | Hardness | mmol/L | 1.2 |
(1) chemical decalcification
Papermaking deep is processed waste water and is flowed into coagulation basin through pipeline, under agitation adds first an amount of saturated lime solution adjust pH to 9 by chemicals dosing plant in coagulation basin, adds the Na of 500mg/L again
2CO
3, then add the FeSO of 8mg/L
4, add again Na
2CO
3Anti-adjust pH to 8.5, the polyphenyl alkene acid amides (PAM) that adds at last 3mg/L, enter tube settler after reacting completely, carry out precipitate and separate, thereby remove calcium magnesium, reduction water hardness in the papermaking deep processing waste water, throw out (being mud) is sent in the sludge sump through pump and pipeline, carries out at last filtering separation in sludge dehydration device, and recovery calcium carbonate, waste water then enters next step and filters;
(2) filter
Waste water after the chemical decalcification is pumped into more medium filter carry out filtering separation, further except SS and colloid in anhydrating;
(3) electrolysis
Waste water after filtering is pumped into the electrolysis machine electrolysis, and the degraded organic macromolecule removes colourity, and improves the biodegradability of waste water, and adjacent two interelectrode voltages of electrolysis machine are 12V, and current density is 200mA/cm
2
(4) BAF is biochemical
Waste water after the electrolysis enters BAF, by the oxidation degradation effect waste water is carried out fast purification, obtains papermaking and purifies liquid waste;
(5) ultrafiltration
The biochemical gained papermaking of BAF purified liquid waste carry out the tubular type ultra-filtration filters, separate to get water-dialyzing and condensed water, water-dialyzing enters reverse-osmosis treated, and condensed water flow to recycle in step (2) electrolysis machine through back of pipeline;
(6) reverse osmosis
Ultrafiltration gained water-dialyzing pumps into reverse osmosis membrane assembly with high-pressure pump after security personnel filter, separate to get water-dialyzing and condensed water through reverse osmosis membrane filtration, and water-dialyzing enters basin and gets reuse water; A condensed water part is separated the redundance discharging through the reflux membrane filtration that circulates of condensed water topping-up pump.
Described tubular type ultrafiltration working conditions is: normal temperature～45 ℃, and operating pressure is 3～300kPa; The membrane module of described reverse osmosis is rolled membrane module, and mould material is composite membrane, and entrance pressure can be 6.0～45.0bar, goes out to press to can be 4.5～33.5 bar.
Above-mentioned ultrafiltration is the tubular type ultrafiltration.Ultrafiltration can be a kind of of immersion ultrafiltration, pillar ultrafiltration, tubular type ultrafiltration, spiral wound or plate-type hyperfiltration.
The reuse water water-quality guideline is as shown in table 6 after measured.
The water-quality guideline of table 6 reuse water
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | 8 | 4 | Colourity | 6 | |
| 2 | SS | mg/L | ≤1 | 5 | Ca | mg/L | ≤1 |
| 3 | Specific conductivity | μS/cm | 60 | 6 | Hardness | mmol/L | 0.06 |
Above-mentioned only is the specific embodiment of the present invention, but design concept of the present invention is not limited to this, 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 (9)
1. the recycling utilization device of a papermaking deep processing waste water is characterized in that: comprise chemical decalcification system, multi-medium filtering system, electrolytic system, BAF, ultrafiltration system and reverse osmosis system;
Described chemical decalcification system comprises coagulation basin, stopping valve and tube settler, and coagulation basin connects with the import of stopping valve, and the outlet of stopping valve connects the import of tube settler, and the outlet of tube settler connects the import of multi-medium filtering system;
Described multi-medium filtering system is provided with stopping valve, working shaft, more medium filter, backwashing pump and cleaning fluid tank; The import of stopping valve connects the outlet of chemical decalcification system, the import of working shaft connects the outlet of stopping valve, the water supply pump outlet connects the import of more medium filter, and the outlet one tunnel of more medium filter connects with electrolytic system, and another road connects cleaning fluid tank through backwashing pump successively;
Described electrolytic system is provided with stopping valve, working shaft and electrolysis machine, the external multi-medium filtering system offtake of the import of stopping valve, the import of working shaft connects the outlet of stopping valve, and the water supply pump outlet connects the import of electrolysis machine, and the outlet of electrolysis machine connects with the import of BAF;
Described BAF is provided with stopping valve, working shaft, water distribution system, pond body, filler, gas blower, stopping valve, scavenging pump, water storing tank, the import of stopping valve connects the outlet of electrolytic system, the import of working shaft connects the outlet of stopping valve, the water supply pump outlet connects the import of water distribution system, water distribution system is positioned at body bottom, pond, filler is positioned at body middle part, pond, gas blower is pond body aeration from pond body bottom, the water outlet one tunnel on body top, pond connects with water storing tank, and another road connects water storing tank through scavenging pump, stopping valve successively;
Described ultrafiltration system is provided with stopping valve, working shaft, ultrafiltration membrane system, backwashing pump, water-dialyzing basin and valve, the import of stopping valve connects the outlet of BAF, the outlet of stopping valve connects the import of working shaft, the water supply pump outlet connects the outlet of ultrafiltration membrane system, the water-dialyzing of ultrafiltration membrane system exports one the tunnel and connects the water-dialyzing basin, another road connects the water-dialyzing basin through backwashing pump, and the condensed water of ultrafiltration membrane system is then through the recycle to the electrolytic system of pipeline and valve return;
Described reverse osmosis system is provided with stopping valve, working shaft, cartridge filter, high-pressure pump, reverse osmosis membrane assembly and reuse water basin, the import of stopping valve connects the outlet of ultrafiltration system, the outlet of stopping valve enters reverse osmosis membrane assembly through working shaft, cartridge filter and high-pressure pump successively, and the water-dialyzing outlet of reverse osmosis membrane assembly connects the import of reuse water basin.
2. papermaking deep according to claim 1 is processed the recycling utilization device of waste water, it is characterized in that: described ultrafiltration system also comprises the ultra-filtration membrane chemical cleaning system, the ultra-filtration membrane chemical cleaning system is provided with cleaning fluid tank, chemical cleaning pump and stopping valve, the outlet of cleaning fluid tank connects the import of chemical cleaning pump, and the matting pump outlet connects ultrafiltration membrane system through stopping valve.
3. papermaking deep according to claim 1 is processed the recycling utilization device of waste water, it is characterized in that: described reverse osmosis system also comprises the reverse osmosis concentration water reclamation system, described reverse osmosis concentration water reclamation system is provided with backflow condensed water topping-up pump, the import of backflow condensed water topping-up pump connects the condensed water outlet of reverse osmosis system, and the outlet of backflow condensed water topping-up pump connects reverse osmosis membrane assembly.
4. papermaking deep according to claim 1 is processed the recycling utilization device of waste water, it is characterized in that: described reverse osmosis system also comprises a reverse osmosis membrane cleaning and regeneration system, described reverse osmosis membrane cleaning and regeneration system is provided with cleaning fluid tank, backwashing pump, stopping valve and valve, the import of cleaning fluid tank connects the water-dialyzing outlet of reverse osmosis membrane assembly through stopping valve, one way outlet of cleaning fluid tank connects the outlet of reverse osmosis system condensed water through stopping valve, valve, and another way outlet of cleaning fluid tank connects the working shaft outlet through backwashing pump.
5. papermaking deep according to claim 1 is processed the recycling utilization device of waste water, and it is characterized in that: the coagulation basin in the described chemical decalcification system is provided with dispensing system and medicine system.
6. a kind of papermaking deep as claimed in claim 1 is processed the recycling utilization device of waste water, it is characterized in that: electrolysis machine is provided with power supply and electrolyzer in the described electrolytic system, and the electrode in the described electrolyzer is a kind of in graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, alloy and the nano-catalytic inert material.
7. a kind of papermaking deep as claimed in claim 6 is processed the recycling utilization device of waste water, it is characterized in that: the top layer of described nano-catalytic noble electrode is coated with the metal oxide inertia catalyst coatings that crystal grain is 10～35nm, and the substrate of described nano-catalytic noble electrode is titanium plate or plastic plate.
8. a kind of papermaking deep according to claim 1 is processed the recycling utilization device of waste water, and it is characterized in that: described ultrafiltration system is a kind of of immersion ultrafiltration system, pillar ultrafiltration system, tubular type ultrafiltration system, spiral wound system or plate-type hyperfiltration system.
9. a kind of papermaking deep according to claim 1 is processed the recycling utilization device of waste water, and it is characterized in that: the reverse osmosis membrane assembly in the described reverse osmosis system is rolled membrane module, and rolled film is cellulose acetate film or composite membrane in the organic membrane.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014187296A1 (en) * | 2013-05-19 | 2014-11-27 | 波鹰(厦门)科技有限公司 | Regenerating and recycling apparatus and method for advanced treatment papermaking wastewater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014187296A1 (en) * | 2013-05-19 | 2014-11-27 | 波鹰(厦门)科技有限公司 | Regenerating and recycling apparatus and method for advanced treatment papermaking wastewater |
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