CN105084577B - Method for treating high-concentration water-based ink waste liquid and dehydrating sludge in high-concentration water-based ink waste liquid - Google Patents
Method for treating high-concentration water-based ink waste liquid and dehydrating sludge in high-concentration water-based ink waste liquid Download PDFInfo
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Abstract
The invention discloses a method for treating high-concentration water-based ink waste liquid and dehydrating sludge in the high-concentration water-based ink waste liquid. The method is characterized by comprising the following steps: collecting the water-based ink waste liquid, pumping the collected water-based ink waste liquid into a reactor, then adding inorganic acid into the waste liquid, carrying out stirring and adjusting the pH value of the waste liquid until the waste liquid is acidic; allowing the sludge to enter and be located on a dehydration filter belt, heating the sludge with infrared rays, carrying out squeezing and dehydration, and spraying water on the dehydrated sludge to rapidly cool the surface of the dehydrated sludge; and taking the sludge off the filter belt and discharging dehydration water into a subsequent waste water treating system. With the method provided by the invention, integrated removal of pollutants in the ink waste liquid and dehydration of the sludge is realized; the removal rate of the pollutants reaches more than 90%; a decolorization ratio is up to more than 99%; and the treated sludge has a water content of lower than 40%.
Description
Technical field
The invention belongs to the sewage, technical field of sludge treatment in environmental project, more particularly to a kind of high concentration aqueous
Ink liquid waste processing and its method for sludge dewatering.
Background technology
Water color ink is because its health, environmental protection, the characteristic of safety, are widely used in every field.Such as packaging material, anti-
Water material generally adopts water color ink in stamp, but needs to clean printing machine and ink reservoir when stamp pattern is changed,
Generate a certain amount of high concentration aqueous' ink waste liquid.The water color ink waste liquid contains a large amount of water soluble polymer resins, hydrophilic
Property the organic pollution such as pigment and organic solvent, pollute it is extremely serious（Colourity is up to more than 30,000 times, CODCrValue up to 200,000-60
Ten thousand mg/L）, it is difficult to process.
For the process of this kind of water color ink waste liquid, generally processed using Coagulation Method, i.e., in hydrotropism's ink waste liquid
Dosing coagulant ferrous sulfate, aluminium polychloride etc., separation of solid and liquid removes substantial amounts of polluter in waste liquid, and abjection water is carried out again
Subsequent treatment, rear discharge up to standard.For solid-liquid separating method and equipment after coagulating, generally filter, band are rolled using sheet frame
Formula dewaterer or centrifugal dehydrator etc. carry out mechanical dehydration, but the sludge produced after coagulation combines water content height, sludge structure
Loosely, it is dehydrated extremely difficult.
The content of the invention
It is an object of the invention to provide a kind of high concentration aqueous' ink waste liquor contamination thing minimizing technology, realizes ink waste liquid
The efficient removal of middle pollutant.
Another object of the present invention is to provide a kind of the efficiently de- of the sludge produced by this kind of water color ink liquid waste processing
Water method.
For achieving the above object, technical method of the invention is：
A kind of high concentration aqueous' ink liquid waste processing and its method for sludge dewatering, comprise the following steps：
Reactor is pumped into after step a. water color ink waste collection, inorganic acid is added in waste liquid, adjust the pH value of waste liquid
For acidity, stirring reaction 3-10min, separate out pollutant reaction, persistently stirring makes sludge into pasty state；
Step b. sludge is entered on dehydration strainer, to sludge temperature is 70-90 DEG C with infrared heating；
Step c. squeezes sludge, makes deeply dehydrating sludge, abjection water and sludge heat exchange in reactor, preheats sludge；
Step d. makes sludge be quickly cooled to surface temperature less than 65 DEG C to sludge water-spraying control；
Step e. removes sludge on strainer, and abjection water enters subsequent wastewater treatment system.
The pH value of waste liquid refers to that pH is 1-2 for acidity in step a；Inorganic acid is in sulfuric acid, hydrochloric acid or nitric acid
Kind.
The step b middle infrared (Mid-IR) width of heating is more than sludge blanket width on strainer.
It is mechanical expression that mode is squeezed in step c.
Water-spraying control water is and the sludge abjection water after sludge heat exchange in reactor in step d.
The present invention general principle be：
Water color ink is referred to as ink, and it is mainly combined by water-soluble resin, organic pigment, solvent and related auxiliaries Jing
Attrition process is formed, and wherein water-soluble resin accounts for 30% of water color ink or so as the binder of ink.Water-soluble resin
In due to water soluble acrylic resin it is functional, be widely used.Therefore for this kind of water color ink waste water, inorganic acid is added
Afterwards, water soluble acrylic resin's breakdown of emulsion acid out can be made, so as to destroy the stability of water color ink, water soluble acrylic resin
After breakdown of emulsion, pigment dispersion declines, and condenses, and together with resin flocculate is formed, and generates substantial amounts of sludge.When sludge plus
When heat is to more than 70 DEG C, acrylic resin macromolecular softens, the hydrophobic contaminant matter such as parcel organic pigment, by Van der Waals
Power, hydrogen bond, intermolecular cohesion occur to shrink automatically, are tightly combined molecule, and reduction combines moisture, shrinks by sludge cohesion
Power extruding internal moisture becomes Free water, it is easy to remove, the dehydration of Jing mechanical expressions, forms block sludge, and dewatering speed is exceedingly fast.
Beneficial effects of the present invention：
A. this kind of high concentration aqueous' ink waste liquid is treated by the present method, and percent of decolourization is up to more than 99%, CODCrClearance reaches
To more than 90%；
B. it is in the lump shape of compact structure after sludge dewatering, moisture percentage in sewage sludge is less than 40%, and sludge volume is little；
C. realize high concentration aqueous' ink waste liquor contamination thing remove it is integrated with sludge dewatering, its dewatering speed soon,
Dewatering efficiency is high, continuously production can process.
Description of the drawings
Fig. 1 is the processing technological flow schematic diagram of the inventive method.
Specific embodiment
Embodiment 1 is with reference to Fig. 1.
The invention provides a kind of high concentration aqueous' ink liquid waste processing and its method for sludge dewatering, adopt aqueous oil
The mineral acid acidified method of black waste liquid makes the pollutant in waste liquid be transformed into hydrophobicity by hydrophily and form flocculate.Jing is infrared
Line is heated, and pollutant is mutually assembled, is softened and shrink and squeeze the block sludge of solidification dehydration formation.Present invention achieves aqueous oil
Black liquid waste processing with it is sludge dewatering integrated, its dewatering speed is fast, and dewatering efficiency is high, and moisture percentage in sewage sludge can be reduced to less than 40%,
And continuously production can process.It is illustrated referring in particular to accompanying drawing 1.
Stirred reactor will be pumped into after water color ink waste collection, inorganic acid and stirring reaction is then added in waste liquid,
The pH value for adjusting waste liquid is acidity, separates out pollutant, and by sludge agitation into pasty state；Sludge is entered on dehydration strainer with infrared
Press dewatering after line heating, makes surface quickly cool down to dewatered sludge water spray；Sludge takes off Chinese effluent, carries out subsequent treatment, takes
Dewatered sludge on lower filter belt, natural mummification.
The invention provides a kind of high concentration aqueous' ink liquid waste processing and its method for sludge dewatering, mainly including following
Step：
Step a. is by brown water color ink waste liquid（CODCr：36.8 ten thousand mg/L；Colourity：50000 times）After being collected in ink reservoir
Stirred reactor is added with sewage pump, inorganic acid is then added in waste liquid, stir 5min, the pH value for adjusting waste liquid is 1-2, is made
Pollutant is separated out, and persistently stirring makes sludge into pasty state；
Step b. sludge is entered on dehydration strainer, using infrared heating, makes sludge be warming up to 78 DEG C, and sludge Jing is infrared
Mutually aggregation, softening are shunk after line heating；
Step c. squeezes sludge, makes deeply dehydrating sludge, abjection water carry out heat exchange with stirred reactor sludge, preheats
Sludge；
Step d. makes sludge be quickly cooled to surface temperature less than 65 DEG C to sludge water-spraying control, and cooling water is using heat
Abjection water after exchange；
Step e. removes dewatered sludge on strainer, and natural mummification, sludge abjection water enters aftertreatment systems.
Using the inventive method process, with infrared heating, again Jing squeezings are de- after this kind of brown water color ink waste liquid acid out
Water, waste liquid CODCrClearance reaches more than 92%, and chroma removal rate is up to more than 99%.Dewatered sludge moisture content is less than 40%, sludge
Compact structure, natural mummification.The method achieve the integration of high concentration aqueous' ink liquid waste processing and sludge dewatering.
Embodiment 2
Stirred reactor will be pumped into after water color ink waste collection, inorganic acid is then added in waste liquid and is stirred, adjusted
The pH value of waste liquid is acidity, separates out pollutant, and persistently stirring makes sludge into pasty state；Sludge is entered on dehydration strainer and uses infrared ray
Press dewatering after heating, makes surface quickly cool down to sludge water spray；Sludge takes off Chinese effluent, carries out subsequent treatment, removes strainer
Upper dewatered sludge, natural mummification.
The invention provides a kind of high concentration aqueous' ink liquid waste processing and its method for sludge dewatering, mainly including following
Step：
Step a. is by black mixing water color ink waste liquid（CODCr：43.2 ten thousand mg/L；Colourity：80000 times）It is collected in ink storage
Stirred reactor is added with sewage pump after groove, inorganic acid is then added in waste liquid, stir 8min, the pH value for adjusting waste liquid is 1-
2, pollutant is separated out, persistently stirring makes sludge into pasty state；
Step b. sludge is entered on dehydration strainer, using infrared heating, makes sludge be warming up to 80 DEG C, and sludge Jing is infrared
Mutually aggregation, softening are shunk after line heating；
Step c. squeezes sludge, makes deeply dehydrating sludge, abjection water carry out heat exchange with sludge in stirred reactor, in advance
Hot sludge；
Step d. makes sludge be quickly cooled to surface temperature less than 65 DEG C to sludge water-spraying control, and cooling water is using heat
Abjection water after exchange；
Step e. removes dewatered sludge on strainer, and natural mummification, sludge abjection water enters aftertreatment systems.
Using the inventive method process, infrared heating, then Jing pressures are used after this kind of black mixing water color ink waste liquid acid out
Squeeze dehydration, waste liquid CODCrClearance reaches more than 92%, and chroma removal rate is up to more than 99%.The method achieve high concentration aqueous
Ink liquid waste processing and the integration of sludge dewatering, and sludge dewatering speed is fast, and dewatering efficiency is high, and dewatered sludge moisture content is low
In 40%, sludge structure is fine and close, natural mummification.
Claims (5)
1. a kind of high concentration aqueous' ink liquid waste processing and its method for sludge dewatering, comprise the following steps：
Stirred reactor is pumped into after step a. water color ink waste collection, inorganic acid and stirring reaction 3- are added in waste liquid
10min, the pH value for adjusting waste liquid is acidity, separates out pollutant reaction, and persistently stirring makes sludge into pasty state；
Step b. sludge is entered on dehydration strainer, uses infrared heating sludge, sludge temperature to reach 70-90 DEG C；
Step c. squeezes sludge, makes sludge dewatering, abjection water and sludge heat exchange in reactor, preheats sludge；
Step d. makes Sludge Surface temperature be cooled to less than 65 DEG C to sludge water-spraying control, makes sludge curing；
Step e. removes sludge on strainer, and abjection water enters subsequent wastewater treatment system.
2. a kind of high concentration aqueous' ink liquid waste processing according to claim 1 and its method for sludge dewatering, its feature
It is that pH value refers to that pH is 1-2 for acidity in step a.
3. a kind of high concentration aqueous' ink liquid waste processing according to claim 1 and its method for sludge dewatering, its feature
It is that the step b middle infrared (Mid-IR) width of heating is more than sludge blanket width on strainer.
4. a kind of high concentration aqueous' ink liquid waste processing according to claim 1 and its method for sludge dewatering, its feature
It is that mode is squeezed in step c for mechanical expression.
5. a kind of high concentration aqueous' ink liquid waste processing according to claim 1 and its method for sludge dewatering, its feature
It is that water-spraying control water is and the abjection water after sludge heat exchange in step d.
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| CN201410185583.XA CN105084577B (en) | 2014-05-05 | 2014-05-05 | Method for treating high-concentration water-based ink waste liquid and dehydrating sludge in high-concentration water-based ink waste liquid |
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| CN201410185583.XA CN105084577B (en) | 2014-05-05 | 2014-05-05 | Method for treating high-concentration water-based ink waste liquid and dehydrating sludge in high-concentration water-based ink waste liquid |
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| CN105084577A CN105084577A (en) | 2015-11-25 |
| CN105084577B true CN105084577B (en) | 2017-05-10 |
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| CN107162252A (en) * | 2017-04-12 | 2017-09-15 | 广东工业大学 | A kind of method of online circular treatment industrial paint waste water containing acrylic acid |
| CN109289766A (en) * | 2018-10-17 | 2019-02-01 | 青岛大学 | A kind of preparation method of adsorbent for heavy metal |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07185564A (en) * | 1993-12-27 | 1995-07-25 | Kiyoushiya:Kk | Treatment of ink dissolution waste solution |
| CN1765762A (en) * | 2005-09-15 | 2006-05-03 | 浙江工商大学 | Aqueous ink waste water disposal process |
| CN1834041A (en) * | 2006-03-30 | 2006-09-20 | 南京科环环境系统工程有限公司 | Aqueous ink wastewater treatment technique |
| CN103373801A (en) * | 2012-04-20 | 2013-10-30 | 青岛大学 | Continuous dehydrating method and device for explosive production wastewater and sludge |
| CN103482822A (en) * | 2013-09-12 | 2014-01-01 | 安徽省绿巨人环境技术有限公司 | High-concentration printing ink waste water processing technology |
-
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- 2014-05-05 CN CN201410185583.XA patent/CN105084577B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07185564A (en) * | 1993-12-27 | 1995-07-25 | Kiyoushiya:Kk | Treatment of ink dissolution waste solution |
| CN1765762A (en) * | 2005-09-15 | 2006-05-03 | 浙江工商大学 | Aqueous ink waste water disposal process |
| CN1834041A (en) * | 2006-03-30 | 2006-09-20 | 南京科环环境系统工程有限公司 | Aqueous ink wastewater treatment technique |
| CN103373801A (en) * | 2012-04-20 | 2013-10-30 | 青岛大学 | Continuous dehydrating method and device for explosive production wastewater and sludge |
| CN103482822A (en) * | 2013-09-12 | 2014-01-01 | 安徽省绿巨人环境技术有限公司 | High-concentration printing ink waste water processing technology |
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Effective date of registration: 20171219 Address after: 215228 south side of Shengze new industrial zone, Wujiang City, Suzhou, Jiangsu Patentee after: Wujiang new forest printing and dyeing Co., Ltd. Address before: 266071 Ningxia Road, Shandong, China, No. 308, No. Patentee before: Qingdao University |
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