CN105110544A - Method for treating wastewater with dilute alkali by aid of macroporous resin - Google Patents
Method for treating wastewater with dilute alkali by aid of macroporous resin Download PDFInfo
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Abstract
The invention discloses a method for treating wastewater with dilute alkali by the aid of macroporous resin. The method includes steps of (1), adsorbing the wastewater with the dilute resin by the aid of the resin, to be more specific, filtering the wastewater with the dilute alkali to obtain filter liquid I, and enabling the filter liquid I to flow through macroporous resin adsorption columns to obtain treatment liquid; (2), recycling the treatment liquid by the aid of carbonate, to be more specific, distilling the treatment liquid under reduced pressures, and thermally filtering the treatment liquid to obtain the carbonate and filter liquid II; (3), recycling solid alkali, to be more specific, heating the filter liquid II to cook alkali, and then cooling the alkali to obtain the solid alkali. According to the technical scheme, the method has the advantages that the wastewater with the dilute alkali is adsorbed by the aid of the macroporous resin, reduced-pressure distillation and high-temperature alkali cooking processes are combined with the method, accordingly, a COD (chemical oxygen demand) value of the wastewater with the dilute alkali can be effectively lowered, and valuable components in the wastewater with the dilute alkali can be recycled; the method is simple in operation, and industrialization can be facilitated; the macroporous resin is easy to regenerate, and accordingly the wastewater with the dilute alkali is low in treatment cost.
Description
Technical field
The present invention relates to trade effluent recycling treatment field, be specifically related to a kind of method of macroporous resin treatment diluted alkaline waste water.
Background technology
Macroporous resin is a class organic polymer sorbent material, its aperture and specific surface area are all larger, resin inside has the three-dimensional pore structure of three-dimensional space, have that physicochemical stability is high, specific surface area is large, loading capacity is large, rate of adsorption is fast, selectivity is good, desorption condition is gentle, manipulation of regeneration is convenient, life cycle is long, be suitable for and form the plurality of advantages such as closed cycle, cost saving, and be insoluble to acid, alkali and various organic solvent.The adsorption of macroporous resin and surface adsorption, surface electrical behavior or to form hydrogen bond etc. relevant, have good absorption property.Macroporous resin is often the spherical particle of white, can be divided into the nonpolar and large class of polarity two, also can be subdivided into low-pole, middle polarity and strong polar macroporous resin according to polarity size according to chain link molecular structure.Macroporous adsorption resin technology has been widely used in multiple fields such as waste water, medicine, chemical industry, analytical chemistry, clinical calibrating and treatment at present.
Macroporous resin is that adding divinylbenzene is linking agent, and toluene, dimethylbenzene are pore-creating agent with vinylbenzene and acrylate for monomer, and their polymerizations that is cross-linked with each other define porous skeleton structure.After polymer formation, pore-creating agent is removed, and leaves hole that is big and small, different, that interpenetrate in resin.Therefore, macroporous adsorbent resin in the dry state its inside has higher porosity, and aperture is comparatively large, between 100 ~ 1000nm, therefore is called macroporous resin.The surface-area of macroporous resin is comparatively large, exchange velocity is fast, physical strength is high, contamination resistance is strong, thermally-stabilised good, all can use in the aqueous solution and non-aqueous solution.Macroporous resin is the parting material that adsorptivity and screening property principle combine, and based on this principle, organic compound, according to the difference of adsorptive power and molecular size range, macroporous adsorbent resin separates through certain solvent elution.
Alkaline waste water is a modal class waste water in trade effluent, not only containing bases, also comprises organism and inorganics etc.Its wide material sources, mainly from the black liquor of papermaking, printing and dyeing industry boil yarn, mercerising wash water, the waste water etc. produced in the ash alkali unhairing waste water of tanning industry and oil, chemical process.
If alkaline waste water just directly discharges, by corrosion pipeline, canal and its structure without process; Enter the pH value that water body can change water body, affect the self-purification of water body, destroy the natural, ecological of water body; Infiltrate soil and then can cause soil property salinization, the pine of destroying soil layer dredges state, affects the growth of plant.In addition, containing a large amount of organism in waste water, the dissolved oxygen in water body can be consumed, cause aerobe anoxia asphyxia in water body dead.If the mankind eat the higher alkaline water of concentration by mistake, metabolism will be affected, and finally causes the imbalance of Digestive tract.Therefore, alkaline waste water after treatment, just must can be disposed to receiving water body.
The physical chemistry method of current process alkaline waste water has the methods such as acid-base neutralisation method, flocculence, chemical precipitation method, crystallization process.As, publication number is that the Chinese patent literature of CN104098206A discloses the pretreated printing and dyeing waste water advanced treatment recovery method of a kind of employing macroporous resin, comprise the following steps: step one, Fenton's reaction: get secondary treatment of dyeing and printing effluents water outlet and add acid for adjusting pH value to 3 to 6, then Fenton's reaction is carried out, add alkali adjust ph after Fenton's reaction terminates to 7 to 8, then add polyacrylamide and carry out coagulation, precipitation; Step 2, ultrafiltration membrance filter: the supernatant liquor got after step one precipitation carries out ultrafiltration membrance filter, obtains ultra-filtration membrane water outlet and the dense water of ultra-filtration membrane; Step 3, macroporous resin adsorption: the macroporous resin reactor adsorption treatment formed primarily of macroporous resin is entered in the ultra-filtration membrane water outlet obtained in step 2, and ultra-filtration membrane concentrate recirculation mixes with secondary treatment yielding water, circular treatment; Step 4: reverse osmosis membrane separation: in step 3, the reverse osmosis membrane separation system formed primarily of reverse osmosis membrane is entered in macroporous resin adsorption water outlet, reverse osmosis membrane produces water and is used for Enterprises utilization as a kind of high-quality water, and the dense water qualified discharge of reverse osmosis membrane or tube drainage of receiving focus on to Sewage Plant.The method treatment step is loaded down with trivial details, and cost for wastewater treatment is high.
Existing alkaline waste water treatment method is not only difficult to process the hardly degraded organic substance in waste water, and does not consider to recycle the valuable constituent in waste water.
Summary of the invention
The invention provides a kind of method of macroporous resin treatment diluted alkaline waste water, diluted alkaline waste water endures alkali process through pre-treatment, macroporous resin adsorption, underpressure distillation and high temperature, finally obtains carbonate, solid caustic soda and process water outlet; The technical program not only achieves the advanced treatment of diluted alkaline waste water, and achieves the recycling of diluted alkaline waste water.
A method for macroporous resin treatment diluted alkaline waste water, carry out according to the following steps:
Step (1): resin absorption: diluted alkaline waste water obtains filtrate I after filtration, and filtrate I flows through macroporous resin adsorption post, obtains treatment solution;
Step (2): carbonate reclaims: treatment solution is through underpressure distillation, and heat filtering obtains carbonate and filtrate II;
Step (3): solid caustic soda reclaims: by filtrate II, intensification is endured alkali, is cooled, obtains solid caustic soda.
In the technical program, diluted alkaline waste water after filtration, macroporous resin adsorption, underpressure distillation and intensification endure the advanced treatment of alkali process implementation diluted alkaline waste water, can active principle in efficient recovery diluted alkaline waste water, achieves the recycling of diluted alkaline waste water.
As preferably, the pH value of described diluted alkaline waste water is greater than 9.
Further preferably, described diluted alkaline waste water is mainly derived from dyeing factory effluent.
Further preferred, described dyeing factory effluent is mainly containing alkali, carbonate.
Under normal circumstances, the complicated component of diluted alkaline waste water, in order to reduce the injury of diluted alkaline waste water to macroporous resin aperture, first carries out filtration treatment to diluted alkaline waste water before carrying out macroporous resin adsorption, with impurity such as the mechanical solid wastes in filtering diluted alkaline waste water.
In order to improve the filtration efficiency of diluted alkaline waste water, improve the treatment effect of diluted alkaline waste water, as preferably, first through sorbent material and/or flocculation agent pre-treatment before diluted alkaline waste water filtering.Diluted alkaline waste water, after the absorption of sorbent material and/or the flocculation of flocculation agent, refilters, and the filtrate (filtrate I) obtained carries out the absorption of macroporous resin again.
The selection of concrete pretreatment mode need assign to determine according to the one-tenth of diluted alkaline waste water, as diluted alkaline waste water COD and colourity are all higher, as preferably, adds sorbent material to diluted alkaline waste water, after stirring reaction 30 ~ 60min, filters and obtain filtrate I.
As preferably, described sorbent material be gac, diatomite, activated alumina, silica gel, zeolite molecular sieve one or more.
The dosage of described sorbent material is 0.05% ~ 1% of diluted alkaline waste water weight.
Described flocculation agent is FeSO
47H
2one or more in O, bodied ferric sulfate, polyaluminium sulfate, PAFS, polymerize aluminum chloride, poly-ferric chloride; The dosage of flocculation agent is 0.01 ~ 1% of diluted alkaline waste water weight.
Filtrate I enters the adsorption column being filled with macroporous resin, and fractionation by adsorption obtains treatment solution.As preferably, in step (1), macroporous resin selects strongly basic anion exchange resin.
Further preferably, described macroporous resin selects styrene series anion exchange resin.
Macroporous adsorbent resin is that a class organic monomer adds the additives such as linking agent, pore-creating agent, dispersion agent and is polymerized, and thus purchases the resin come and will remove the toxicity organic residue that may exist.Macroporous resin, before post filled out by equipment, carries out pre-treatment according to GB/T5476-2013 method to macroporous resin.
As preferably, in step (1), the flow velocity that filtrate I flows through macroporous resin adsorption post is 1BV/h ~ 4BV/h.
Under described flow velocity, the COD clearance of diluted alkaline waste water is high, and processing efficiency is high.Flow velocity is greater than 4BV/h, larger to the surging force of macroporous resin adsorption post, easily reduces post effect, and the too fast COD clearance likely reducing diluted alkaline waste water of flow velocity; Flow velocity is less than 1BV/h, and the processing efficiency of alkaline waste water is too low.
Step (1) absorption after obtain treatment solution, the organic impurity in treatment solution and pigment are all fewer, treatment solution through the underpressure distillation of step (2), concentrated solution filtered while hot, the carbonate in recycle process fluids.
The phlegma of underpressure distillation is process water outlet, by line for obtained process water outlet, also can reuse to the regeneration of the macroporous resin adsorption post of step (1), also can be used as the condensation water in diluted alkaline wastewater treatment process.
As preferably, in step (2), heat filtering temperature is with 30 ~ 50 DEG C.
Heat filtering at such a temperature, the colourity of the carbonate of filtered and recycled is relatively good, and purity is higher, filters the filtrate III obtained and is transferred in solid caustic soda pot, and the evaporation that heats up is until separate out a large amount of solid caustic soda.
Through the underpressure distillation of step (2), reclaimed the most of water in treatment solution, the moisture content of the filtrate III obtained is not high, and the evaporation that will be conducive to the alkali of step (3) is reclaimed, and is conducive to the process energy consumption reducing diluted alkaline waste water.
In step (3), the solid caustic soda pot of employing is common iron pot, and this iron pot can bear the temperature of enduring needed for alkali.
As preferably, in step (3), the temperature of enduring alkali is 450 ~ 480 DEG C.
Further preferably, in step (3), the temperature of enduring alkali is 460 ~ 470 DEG C.
As preferably, in step (3), the time of enduring alkali collection solid caustic soda is 0.5-1.5h.
Further preferably, in step (3), described in endure alkali collection solid caustic soda time be 1h.
Macroporous resin adsorption post is after Reusability, and macroporous resin surface and the many non-adsorbent compositions of internal residual or impurity, post darkens, and post effect reduces.In order to improve the treatment effect of diluted alkaline waste water, reduce the processing cost of diluted alkaline waste water, macroporous resin needs washing in time, regeneration.
As preferably, also comprise step (4), regenerate macroporous resin, regeneration step is:
Step is 1.: clear water washs;
Step is 2.: elutriant gradient elution;
Step is 3.: wash with clear water after gradient elution completes again.
Clear water described herein is phlegma (process water outlet), tap water or the pure water that step (2) or step (3) are distilled.In regenerative process, step 1. mainly wash-out, displacement macroporous resin adsorption diluted alkaline waste water, 2. step mainly washs, replace the organism of macroporous resin adsorption; 3. step mainly washs, the elutriant of replacing in macroporous resin.
As preferably, described elutriant is the mixed solution of aqueous acid and organic solvent, and wherein aqueous acid is aqueous hydrochloric acid or aqueous sulfuric acid, and organic solvent is methyl alcohol, ethanol or acetone.
Further preferably, step 2. in, carry out wash-out by with Gradient:
Elutriant a: V
organic solvent: V
10% aqueous acid=1:1, according to 1BV/h flow velocity, squeezes into macroporous resin adsorption post through peristaltic pump adverse current, obtains a wash-out waste liquid 1BV;
Secondary elutriant: V
organic solvent: V
5% aqueous acid=1:1, according to 1BV/h flow velocity, squeezes into macroporous resin adsorption post through peristaltic pump adverse current, obtains secondary wash-out waste liquid 1BV;
Three elutriant: V
organic solvent: V
2.5% aqueous acid=1:1, according to 1BV/h flow velocity, squeezes into macroporous resin adsorption post through peristaltic pump adverse current, collects 0.5BV, adds follow-up emptied of water 0.5BV, obtain three wash-out waste liquid 1BV.
By the parameter such as organic content, COD value of HPLC real-time follow-up gradient elution wash-out waste liquid out, determine the need of carrying out the 4th elution process as required, the same, each wash-out waste liquid according to circumstances determines whether go back to apply mechanically.
Adopt above-mentioned gradient elution, the regeneration effect of macroporous resin can be improved.After step gradient elution 2. completes, then carry out step clear water washing 3., thus complete the regeneration of macroporous resin adsorption post.
Macroporous resin adsorption post is after diluted alkaline waste water adsorption treatment repeatedly and regeneration, and macroporous resin adsorption post resin particle extrudes tension and likely small portion is broken; Impurity in post is more, color is darker.In order to improve the post effect of macroporous resin, increasing the treatment effect of diluted alkaline waste water, needing macroporous resin to be shifted out, be placed in a larger container, then use clear water, elutriant, clear water regenerated from washing, after having regenerated, more again fill out post.
The wash-out waste liquid of regenerative elution is through distillation recoverable organic solvent, and remaining vinasse is mainly acid and aniline category matter, and adopt the method process raffinate of formaldehyde condensation, the filtrate after filtration is clean acid solution, can be back in resin elution process.
The present invention utilizes macroporous resin to adsorb diluted alkaline waste water, then endures alkali technique in conjunction with underpressure distillation and high temperature, effectively can reduce the COD value of diluted alkaline waste water, and reclaim valuable component in diluted alkaline waste water, the technical program is simple to operate, is easy to industrialization; And macroporous resin regeneration is simple, the processing cost of diluted alkaline waste water is low.
Accompanying drawing explanation
Fig. 1 is production technological process of the present invention.
Embodiment
COD of the present invention adopts potassium bichromate National Standard Method to measure, and pH adopts acidometer to measure.
Embodiment 1
Certain dyestuff company produces the diluted alkaline waste water produced in indigo process, and mainly containing inorganicss such as sodium hydroxide, potassium hydroxide, sodium carbonate and salt of wormwood, other organism is aniline, methylphenylamine, anthranilic acid, ammonia, ammonium salt etc.The COD of waste water is 4786mg/L, C (OH after measured
-)=3.4mol/L, C (CO
3 2-)=0.3mol/L.
Treatment step:
Step (1) resin absorption: add 0.3% gac (with the quality of diluted alkaline waste water for benchmark) in diluted alkaline mother liquor, after stirring reaction 30min, filtering separation obtains filtrate I.Then filtrate I flows through styrene series anion exchange resin adsorption column, and flow velocity is 1BV/h, obtains treatment solution, and treatment solution COD is 383mg/L, and the clearance for the treatment of solution COD is 92%.
Step (2) carbonate extracts: treatment solution is after concentrating under reduced pressure 4 times, and be cooled to 40 DEG C of filtering separation and obtain carbonate, filtrate II and process water outlet, the COD wherein processing water outlet is the clearance of 56mg/L, COD is 98.8%.
Step (3) solid caustic soda extracts: be placed in reactor by filtrate II, be heated to 450 ~ 480 DEG C, insulation reaction 1h at this temperature, cool and obtain solid caustic soda.
Step (4): resin regeneration: by the following method desorption and regeneration is carried out to macroporous resin adsorption post:
Step 1. clear water washing: the diluted alkaline waste water in wash-out macroporous resin:
Clear water is according to 1BV/h flow velocity, macroporous resin adsorption post is squeezed into through peristaltic pump adverse current, by parameters such as HPLC real-time follow-up acid residual concentration (wt%), COD value, determine that washing water out can go back to apply mechanically the need of carrying out continuation washing as required.
Step is 2.: elutriant gradient elution:
Elutriant a: V
methyl alcohol: V
10% sulphuric acid soln=1:1, according to 1BV/h flow velocity, squeezes into macroporous resin adsorption post through peristaltic pump adverse current, and obtain a wash-out waste liquid 1BV, elutriant according to circumstances determines whether go back to apply mechanically;
Secondary elutriant: V
methyl alcohol: V
5% sulphuric acid soln=1:1, according to 1BV/h flow velocity, squeezes into macroporous resin adsorption post through peristaltic pump adverse current, and obtain secondary wash-out waste liquid 1BV, elutriant according to circumstances determines whether go back to apply mechanically;
Three elutriant: V
methyl alcohol: V
2.5% sulphuric acid soln=1:1, according to 1BV/h flow velocity, squeezes into macroporous resin adsorption post through peristaltic pump adverse current, and collect 0.5BV, add follow-up emptied of water 0.5BV, obtain three wash-out waste liquid 1BV, wash-out waste liquid according to circumstances determines whether go back to apply mechanically;
The parameter such as organic content (wt%), COD value of the wash-out waste liquid of the above gradient elution process of HPLC real-time follow-up, determines as required the need of carrying out the 4th elution process.
The wash-out waste liquid collected reclaims methyl alcohol through underpressure distillation, and remaining sour raffinate can be back in resin elution process through formaldehyde condensation.
Step 3. clear water washing: the elutriant in washing macroporous resin.
Clear water is according to 1BV/h flow velocity, macroporous resin adsorption post is squeezed into through peristaltic pump adverse current, the parameters such as real-time follow-up acid residual concentration (wt%), organic concentration (HPLC), COD value, residual methanol content, determine the need of continuation washing as required, until meet the requirements.
Embodiment 2
Certain dyestuff company produces the diluted alkaline waste water produced in indigo process, and mainly containing inorganicss such as sodium hydroxide, potassium hydroxide, sodium carbonate and salt of wormwood, other organism is aniline, methylphenylamine, anthranilic acid, ammonia, ammonium salt etc.The COD of waste water is 5238mg/L, C (OH after measured
-)=3.4mol/L, C (CO
3 2-)=0.3mol/L.
Compared with embodiment 1, other treatment condition remain unchanged, and change the flow velocity of wastewater streams through macroporous resin adsorption post, flow velocity is increased to 4BV/h, and the COD of the treatment solution obtained is 1284mg/L, and the clearance for the treatment of solution COD is 75%.It can thus be appreciated that when waste water flow velocity is slower, macroporous resin can adsorb the organism in waste water preferably, the effect of process waste water is better.
Embodiment 3
Certain dyestuff company produces the diluted alkaline waste water produced in indigo process, and mainly containing inorganicss such as sodium hydroxide, potassium hydroxide, sodium carbonate and salt of wormwood, other organism is aniline, methylphenylamine, anthranilic acid, ammonia, ammonium salt etc.The COD of waste water is 4786mg/L, C (OH after measured
-)=3.4mol/L, C (CO
3 2-)=0.3mol/L.
Compared with embodiment 1, other treatment condition are constant, do not add gac, and through the process of macroporous resin adsorption post after mother liquor direct filtration, flow velocity remains unchanged, the inclined oyster of the treatment solution obtained, and COD is 727mg/L, and the clearance for the treatment of solution COD is 85%.As can be seen here, the colourity of diluted alkaline mother liquor and COD higher time, can first carry out after macroporous resin adsorption post after pre-treatment, such water treatment effect is better.
Embodiment 4
Compared with embodiment 3, other treatment condition are constant, add Polyferric Sulfate Flocculants, the addition of flocculation agent is the 0.1wt% of diluted alkaline waste water weight, through the process of macroporous resin adsorption post after filtration, flow velocity remains unchanged, the inclined oyster of the treatment solution obtained, COD is 536mg/L, and the clearance for the treatment of solution COD is 89%.As can be seen here, the colourity of diluted alkaline mother liquor and COD higher time, the pre-treatment of flocculation agent is conducive to improving water treatment effect.
Embodiment 5
The alkaline waste water that printing and dyeing company produces, main containing sodium hydroxide and a small amount of carbonate and other organism, the COD of waste water is 4378mg/L, C (OH after measured
-)=2.7mol/L, C (CO
3 2-)=0.2mol/L.
Treatment step:
Step (1) resin absorption: add 0.2% gac (with the quality of diluted alkaline waste water for benchmark) in diluted alkaline mother liquor, after stirring reaction 30min, filtering separation obtains filtrate I.Then filtrate I flows through styrene series anion exchange resin adsorption column, and flow velocity is 1.5BV/h, obtains treatment solution, and its COD is 401mg/L, and the clearance for the treatment of solution COD is 91%.
Resin regeneration: clear water drip washing+sulfuric acid and methanol gradient drip washing+clear water drip washing, after three drip washing, macroporous resin can utilize again.
Step (2) carbonate extracts: treatment solution is after concentrating under reduced pressure, and be cooled to 40 DEG C of filtering separation and obtain carbonate, filtrate II and process water outlet, the COD wherein processing water outlet is the clearance of 86mg/L, COD is 98.0%.
Step (3) solid caustic soda extracts: be placed in reactor by filtrate II, be heated to 450 ~ 480 DEG C, insulation reaction 1h at this temperature, cool and obtain solid caustic soda.
The desorption and regeneration of macroporous resin adsorption post is see embodiment 1.
Embodiment 6
Tricot mercerising wash water alkali lye, wherein containing sodium hydroxide, sodium carbonate and partial organic substances, the COD of waste water is 2873mg/L, C (OH after measured
-)=0.7mol/L, C (CO
3 2-)=0.1mol/L.
Treatment step:
Step (1) resin absorption: namely diluted alkaline mother liquor obtains filtrate I after filtering, and then filtrate I flows through styrene series anion exchange resin adsorption column, and flow velocity is 2BV/h, obtains treatment solution, and its COD is 145mg/L, and treatment solution COD clearance is 95%.
Resin regeneration: clear water drip washing+sulfuric acid and methanol gradient drip washing+clear water drip washing, after three drip washing, macroporous resin can utilize again.
Step (2) carbonate extracts: treatment solution is after underpressure distillation, and be cooled to 40 DEG C of filtering separation and obtain carbonate, filtrate II and process water outlet, the COD wherein processing water outlet is the clearance of 33mg/L, COD is 98.8%.
Step (3) solid caustic soda extracts: be placed in reactor by filtrate II, be heated to 450 ~ 480 DEG C, insulation reaction 1h at this temperature, cool and obtain solid caustic soda.
The desorption and regeneration of macroporous resin adsorption post is see embodiment 1.
Claims (10)
1. a method for macroporous resin treatment diluted alkaline waste water, is characterized in that, comprises the following steps:
Step (1): resin absorption: diluted alkaline waste water obtains filtrate I after filtration, and filtrate I flows through macroporous resin adsorption post, obtains treatment solution;
Step (2): carbonate reclaims: treatment solution is through underpressure distillation, and heat filtering obtains carbonate and filtrate II;
Step (3): solid caustic soda reclaims: by filtrate II, intensification is endured alkali, is cooled, obtains solid caustic soda.
2. the method for macroporous resin treatment diluted alkaline waste water as claimed in claim 1, it is characterized in that, the pH value of described diluted alkaline waste water is greater than 9.
3. the method for macroporous resin treatment diluted alkaline waste water as claimed in claim 1, is characterized in that, first through sorbent material and/or flocculation agent pre-treatment before diluted alkaline waste water filtering.
4. the method for macroporous resin treatment diluted alkaline waste water as claimed in claim 3, is characterized in that, described sorbent material be gac, diatomite, activated alumina, silica gel, zeolite molecular sieve one or more.
5. the method for macroporous resin treatment diluted alkaline waste water as claimed in claim 1, it is characterized in that, in step (1), macroporous resin selects strongly basic anion exchange resin.
6. the method for macroporous resin treatment diluted alkaline waste water as claimed in claim 1, it is characterized in that, in step (1), the flow velocity that filtrate I flows through macroporous resin adsorption post is 1BV/h ~ 4BV/h.
7. the method for macroporous resin treatment diluted alkaline waste water as claimed in claim 1, it is characterized in that, also comprise step (4), regenerate macroporous resin, regeneration step is:
Step is 1.: clear water washs;
Step is 2.: elutriant gradient elution;
Step is 3.: wash with clear water after gradient elution completes again.
8. the method for macroporous resin treatment diluted alkaline waste water as claimed in claim 7, it is characterized in that, described elutriant is the mixed solution of aqueous acid and organic solvent, and wherein aqueous acid is aqueous hydrochloric acid or aqueous sulfuric acid, and organic solvent is methyl alcohol, ethanol or acetone.
9. the method for macroporous resin treatment diluted alkaline waste water as claimed in claim 1, it is characterized in that, in step (2), heat filtering temperature is with 30 ~ 50 DEG C.
10. the method for macroporous resin treatment diluted alkaline waste water as claimed in claim 1, it is characterized in that, in step (3), the temperature of enduring alkali is 450 ~ 480 DEG C.
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| CN106564987A (en) * | 2016-10-17 | 2017-04-19 | 中国有色集团（广西）平桂飞碟股份有限公司 | Ion exchange process for recovering tungsten from tungsten-containing diluted solution wastewater |
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| CN109423857A (en) * | 2017-08-31 | 2019-03-05 | 青岛海尔滚筒洗衣机有限公司 | A kind of filter core and the washing machine using the filter core |
| CN107879527A (en) * | 2017-10-25 | 2018-04-06 | 无锡琨圣科技有限公司 | Waste water reclaiming device after a kind of making herbs into wool cleaning |
| CN107879527B (en) * | 2017-10-25 | 2021-02-26 | 无锡琨圣智能装备股份有限公司 | Waste water recovery device after cleaning of making herbs into wool |
| CN110404522A (en) * | 2019-08-13 | 2019-11-05 | 包头稀土研究院 | Adsorb the regeneration method of the resin column of organic impurities in rare-earth chloride solution |
| CN110404522B (en) * | 2019-08-13 | 2022-08-02 | 包头稀土研究院 | Regeneration method of resin column for adsorbing organic impurities in rare earth chloride solution |
| CN113943074A (en) * | 2021-11-18 | 2022-01-18 | 山西北化关铝化工有限公司 | Treatment method of high-insensitive explosive production wastewater |
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