CN104624615B - In a kind of indigo production, mix its Future about Alkaline Residue Treatment Unit - Google Patents
In a kind of indigo production, mix its Future about Alkaline Residue Treatment Unit Download PDFInfo
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- CN104624615B CN104624615B CN201510077645.XA CN201510077645A CN104624615B CN 104624615 B CN104624615 B CN 104624615B CN 201510077645 A CN201510077645 A CN 201510077645A CN 104624615 B CN104624615 B CN 104624615B
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Abstract
The present invention relates to mix its Future about Alkaline Residue Treatment Unit in a kind of indigo production, it is characterized in that: comprise alkaline residue thinning tank, carburizing reagent still, the first centrifuge, spray drying tower, incinerator, thinning tank, ageing reactor, the second centrifuge and mixed base storage tank, alkaline residue thinning tank is slagged tap and is connected carburizing reagent still, alkaline residue thinning tank fluid connects mixed base storage tank, carburizing reagent still, the first centrifuge, spray drying tower, incinerator, ageing reactor, the second centrifuge connects successively, carburizing reagent still connects titanium dioxide tower and supplies with, mixed base storage tank connects ageing reactor, the second centrifuge fluid connects alkaline residue thinning tank or mixed base storage tank.
Description
Technical field
The present invention relates to indigo its Future about Alkaline Residue Treatment Unit and processing method, is in the indigo production of a kind of vat specificallyThe alkaline residue treatment of wastes produced device producing in KOH and NaOH mixed base recovery process.
Background technology
Indigo is a kind of vat, and it is with a long history, and before more than 4000 year, the mankind just start with the natural indigo fiber crops of dyingCloth. 1880, since Germanization scholar Bayer success synthesizing indigo, indigo always lasting, be widely used in cotton, fiber crops etc.The dyeing of fabric, particularly denim painted.
Traditional indigo synthesis technique is: anilinoacetic acid potassium/sodium salt and Sodamide do molten at the mixed base of KOH and NaOHIn the system of agent, there is alkali fusion reaction, generate indoxyl potassium/sodium, ammonia and NaOH. After alkali fusion thing dilute with water, blowing airOxidation obtains indigoly after press filtration, and the mother liquor after press filtration is containing the KOH of alkali 12% and the mixed ammonium/alkali solutions of NaOH.
In the time that alkali fusion reacts, the mixed base K/Na=1:1 of KOH and NaOH, due in the time reacting, the sodium in Sodamide transformsFor NaOH, make potassium sodium in mother liquor than being 0.5-0.6:1, NaOH is excessive, after dehydration is reclaimed, does not reach that to do alkali fusion moltenThe requirement of agent, existing method is: in mixed alkali, add potassium hydroxide and regulate potassium sodium ratio. This has just caused mixed base to have richnessMore than, an alkali part more than needed is carbonized in the time of oxidation section, becomes sodium carbonate, separates out and becomes alkaline residue, as solid in concentration processUseless. A part runs off with indigo wash water, and the diluted alkaline in wash water neutralizes through sulfuric acid, becomes salt, finally becomes waste water. Not only polluteEnvironment, and cause the loss of potassium, waste potassium resource.
The alkali running off in indigo wash water has passed through recovery, and the alkali of carrying secretly in alkaline residue runs off with alkaline residue, indigo per tonThe blue alkaline residue that produces 1000kg left and right, the treating method of existing alkaline residue is that not only potassium sodium resource does not have by selling paper mill outwardBe effectively utilized, and can form secondary pollution.
Summary of the invention
The present invention is directed to the problems referred to above, in conjunction with the feature of existing soda balance technology and chemical recovery system, what provide is indigoIn production, mix its Future about Alkaline Residue Treatment Unit, adopt the method that reclaims, processes, applies mechanically, the organic impurities that impact in alkaline residue is applied mechanically goesRemove, isolate sodium carbonate, more remaining alkali is got back in soda balance system, realized the full recycling of potassium sodium resource, reachReduce the consumption of discharge, reduction potassium hydroxide, realized the object turning waste into wealth.
The technical solution used in the present invention is: in a kind of indigo production, mix its Future about Alkaline Residue Treatment Unit: comprise alkaline residue thinning tank,Carburizing reagent still, the first centrifuge, spray drying tower, incinerator, thinning tank, ageing reactor, the second centrifuge and mixed baseStorage tank, alkaline residue thinning tank is slagged tap and is connected carburizing reagent still, and alkaline residue thinning tank fluid connects mixed base storage tank, carburizing reagent still, theOne centrifuge, spray drying tower, incinerator, ageing reactor, the second centrifuge connect successively, and carburizing reagent still connects titanium dioxide towerSupply with, mixed base storage tank connects ageing reactor, and the second centrifuge fluid connects alkaline residue thinning tank or mixed base storage tank.
Further, described the second centrifuge is slagged tap and is connected dry evaporimeter.
Further, described the first centrifuge connects spray drying tower through pans.
Further, described incinerator connects ageing reactor through thinning tank.
In a kind of indigo production, mix alkaline residue processing method, first will in indigo oxidation press filtration mother liquor concentration process, separate outBe rich in sodium carbonate, organic impurities and be entrained with the NaOH of 20-30% and the alkaline residue solid waste of KOH mixed base adds in alkaline residue thinning tank,Send alkaline residue by alkaline residue thinning tank to carburizing reagent still, stir, pass into carbon dioxide, until hydroxyl has all neutralized; AgainBy the first centrifuge first separation, isolate sodium carbonate through intermediate temperature drop, solid-liquid, separate the spray-dried tower spraying of mother liquor dryObtain solids mixing salt, incinerator high temperature sintering solids mixing salt, removes organic matter wherein, and residual solid is at ageing reactorIn add mixed base in mixed base storage tank, by ion-exchange, solid-liquid is by the second centrifuge secondary separation, secondary separation mother liquor againGet back in mixed base storage tank or for supplying with alkaline residue thinning tank, isolate the dry collection of solid sodium carbonate.
Further, solid alkaline residue drop into add water in reactor stir after the solid content of mixed material at 15.0%-85.0%.
Further, logical carbon dioxide has neutralized preferred PH=7-8.
The temperature of charge 0-90 DEG C that further, once, secondary centrifuging separates.
Further, calcination temperature is at 300-1000 DEG C.
Again further, the temperature 0-90 DEG C of ion-exchange.
Be rich in sodium carbonate, organic impurities and be entrained with 20-30%'s what separate out in indigo oxidation press filtration mother liquor concentration processThe alkaline residue solid waste of NaOH and KOH mixed base, first solid alkaline residue dilutes or washs rear alkaline residue and send into carbonization in alkaline residue thinning tankIn reactor, after adding water and stirring, pass into carbon dioxide, until hydroxyl has all neutralized. Then, through pans coolings,The first centrifuge solid-liquid first separation, because sodium carbonate solubility in NaOH, KOH mixed base is less, sodium carbonate precipitates onceIsolate, after the spray-dried tower spraying of first separation mother liquor is dry, obtain solids mixing salt. Again by the solids mixing obtainingSalt, through incinerator high temperature sintering, removes organic impurities wherein, and residual solid adds indigo oxidation press filtration mother in ageing reactorThe mixed base of the concentrated mixed base storage tank of liquid, potash and NaOH carry out ion-exchange, isolate sodium carbonate, the second centrifuge twoInferior separation mother liquor returns mixed base storage tank or delivers to alkaline residue thinning tank, and isolated solid sodium carbonate is dry to be collected as commoditySell outward, realized the full recycling of potassium sodium resource.
Technique of the present invention has the feature of small investment, instant effect, energy-efficient, clean environment firendly, can be well with existingThe combination of alkali evaporization process, and do not increase, do not introduce new impurity, be the new side of potassium sodium resource in a best recovery alkaline residueMethod.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
In figure: alkaline residue thinning tank 1, carburizing reagent still 2, the first centrifuges 3, pans 4, spray drying tower 5, incinerator 6,Thinning tank 7, ageing reactor 8, mixed base storage tank 9, the second centrifuges 10, dry evaporimeter 11.
Detailed description of the invention
The present invention can be further described with non-limiting embodiment hereinafter.
Shown in Fig. 1, in a kind of indigo production, mix its Future about Alkaline Residue Treatment Unit and comprise alkaline residue thinning tank 1, carburizing reagent still 2,One centrifuge 3, pans 4, spray drying tower 5, incinerator 6, thinning tank 7, ageing reactor 8, mixed base storage tank 9, second fromScheming 10 and dry evaporimeter 11. Alkaline residue thinning tank is slagged tap and is connected carburizing reagent still, and alkaline residue thinning tank fluid connects mixed base storageTank, carburizing reagent still, the first centrifuge, pans, spray drying tower, incinerator, thinning tank, ageing reactor, second centrifugalMachine connects successively, and carburizing reagent still connects titanium dioxide tower and supplies with, and mixed base storage tank connects ageing reactor, and the second centrifuge fluid connectsAlkaline residue thinning tank or mixed base storage tank, the second centrifuge is slagged tap and is connected dry evaporimeter. .
Embodiment 1:
By the alkaline residue producing in a collection of indigo production, take 1000kg and add in reactor, add 800kg water, stirAfter 30min, pass into carbon dioxide, until hydroxyl total overall reaction is complete, pH value reaches 8. Then, open temperature lowering water, material is fallenTo 75 DEG C, then centrifugation, obtains sodium carbonate 73kg. First separation mother liquor is with being pumped to spray drying tower, spray-driedAfter, obtain solids mixing salt 714kg. By the solids mixing salt obtaining, through high temperature sintering, remove organic matter wherein, calcination again2h, temperature is controlled at 630-650 DEG C. Calcination residual solid is joined in 48% mixed base, by ion-exchange, isolateSodium carbonate 381kg, secondary separation mother liquor returns in soda balance system, and isolated solid sodium carbonate is done after weighing, packingFor commodity are sold outward, potassium hydroxide has been got back to again in mixed base.
Embodiment 2:
By the alkaline residue producing in a collection of indigo production, take 1000kg and add in reactor, add 600kg water, stirAfter 30min, pass into carbon dioxide, until hydroxyl total overall reaction is complete, pH value reaches 8. Then, open temperature lowering water, material is fallenTo 75 DEG C, then centrifugation, obtains sodium carbonate 116kg. A mother liquor is with being pumped to spray drying tower, spray-dried after,Obtain solids mixing salt 664kg. By the solids mixing salt obtaining, through high temperature sintering, remove organic matter wherein, calcination again1.5h, temperature is controlled at 750-800 DEG C. Calcination residual solid is joined in 48% mixed base, by ion-exchange, separateGo out sodium carbonate 355kg, secondary mother liquid returns in soda balance system, the conduct after weighing, packing of isolated solid sodium carbonateCommodity are sold outward, and potassium hydroxide has been got back to again in mixed base.
Claims (2)
1. in indigo production, mix an its Future about Alkaline Residue Treatment Unit, it is characterized in that: comprise alkaline residue thinning tank, carburizing reagent still,One centrifuge, spray drying tower, incinerator, thinning tank, ageing reactor, the second centrifuge and mixed base storage tank, alkaline residue dilutionTank is slagged tap and is connected carburizing reagent still, and alkaline residue thinning tank fluid connects mixed base storage tank, carburizing reagent still, the first centrifuge, sprayingDrying tower, incinerator, ageing reactor, the second centrifuge connect successively, and carburizing reagent still connects carbon dioxide and supplies with, mixed base storageTank connects ageing reactor, and the second centrifuge fluid connects alkaline residue thinning tank or mixed base storage tank, and described the second centrifuge is slagged tap and connectedConnect dry evaporimeter, described the first centrifuge connects spray drying tower through pans.
2. in the indigo production of one according to claim 1, mix its Future about Alkaline Residue Treatment Unit, it is characterized in that: described incinerator warpThinning tank connects ageing reactor.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101323577B (en) * | 2007-06-14 | 2011-04-13 | 重庆达华砼外加剂科技发展有限公司 | Method for extracting aniline and sodium carbonate and potassium carbonate from mixed alkaline residue in bipseudoindoxyl production |
| CN101774654B (en) * | 2009-01-08 | 2012-04-18 | 重庆宁寰再生资源开发有限责任公司 | Treatment device of waste liquid/slag |
| CN102924956B (en) * | 2011-08-09 | 2014-04-16 | 江苏泰丰化工有限公司 | Recovery, balance adjustment and comprehensive utilization technology for mixing alkali in indigo blue production |
| CN103601216A (en) * | 2013-11-06 | 2014-02-26 | 江苏泰丰化工有限公司 | Device for recovering mixed alkaline liquid in indigo blue after-treating and washing processes |
| CN104624616B (en) * | 2015-02-13 | 2016-08-17 | 内蒙古泰兴泰丰化工有限公司 | A kind of indigo production mixes its Future about Alkaline Residue Treatment Unit and processing method |
| CN204503741U (en) * | 2015-02-13 | 2015-07-29 | 内蒙古泰兴泰丰化工有限公司 | Its Future about Alkaline Residue Treatment Unit is mixed in a kind of indigo production |
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