CN105084576B - A kind of high concentration aqueous's ink liquid waste processing and its method for sludge dewatering - Google Patents
A kind of high concentration aqueous's ink liquid waste processing and its method for sludge dewatering Download PDFInfo
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- CN105084576B CN105084576B CN201410185517.2A CN201410185517A CN105084576B CN 105084576 B CN105084576 B CN 105084576B CN 201410185517 A CN201410185517 A CN 201410185517A CN 105084576 B CN105084576 B CN 105084576B
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Abstract
The invention discloses a kind of high concentration aqueous's ink liquid waste processing and its method for sludge dewatering, it is characterised in that comprises the following steps：Stirred reactor will be pumped into after water-based ink waste collection, inorganic acid is then added into waste liquid and is stirred, the pH value for adjusting waste liquid is acidity；Press dewatering after being heated on sludge entrance dehydration strainer with microwave, dewatered sludge water spray make surface quickly cool down；The sludge on strainer is removed, abjection water is discharged into subsequent wastewater treatment system.Using the processing method of the present invention, realize ink waste liquor contamination thing and remove and sludge dewatering integrated, pollutants removal rate reaches more than 90%, and percent of decolourization reaches more than 99%, and moisture percentage in sewage sludge is less than 40%.
Description
Technical field
The invention belongs to the sewage in environmental project, technical field of sludge treatment, more particularly to a kind of high concentration aqueous
Ink liquid waste processing and its method for sludge dewatering.
Background technology
Water-based ink is widely used because its health, environmental protection, the characteristic of safety in every field.Such as packaging material, prevent
Water material generally use water-based ink in stamp, but need to clean printing machine and ink reservoir when changing stamp pattern,
Generate a certain amount of high concentration aqueous's ink waste liquid.The water-based ink waste liquid contains a large amount of water soluble polymer resins, hydrophilic
Property the organic pollution such as pigment and organic solvent, pollution 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 handle.
Processing for this kind of water-based ink waste liquid, generally use Coagulation Method are handled, i.e., in hydrotropism's ink waste liquid
Dosing coagulant ferrous sulfate, aluminium polychloride etc., separation of solid and liquid remove substantial amounts of polluter in waste liquid, and abjection water is carried out again
Subsequent treatment, discharged after up to standard.For the solid-liquid separating method and equipment after coagulating, generally use sheet frame rolls filter, band
Formula dewaterer or centrifugal dehydrator etc. carry out mechanical dehydration, but caused sludge combination water content is high after coagulation, and dehydration is extremely
It is difficult.
Chinese patent once disclosed a kind of microwave and mud dewatering method associated with PAM flocculants（Publication number
CN102659297A）, its method is will pass through the sludge of sludge concentration tank, in the condition that frequency is 2450MHz, power is 700w
Lower microwave radiation 50s, then adds PAM flocculants, adds ratio and adds 4mLPAM flocculants, PAM flocculants for 100mL sludge
Concentration be 1g/L, centrifuged or filter-press dehydration, that is, complete sludge dewatering.The invention is using microwave radiation to sludge flco
Effect, mud granule is accelerated mutually collision, the destroyed release which part knot of sludge flco by electromagnetic field of high frequency
Heshui and Interstitial Water, then combine the conditioning of PAM flocculants, mud granule is taken off steady flocculation rapidly, so that the dehydration effect of sludge
Fruit more preferably, while reduces flocculant dosage.A kind of excess sludge dehydration based on microwave irradiation technology disclosed in Chinese patent
Method（Publication number CN102643005A）, realized by following steps：1. add on the pipeline between sedimentation basin and concentration basin
One section of GRP pipe is filled, installs microwave loading device additional outside GRP pipe；It is 2. the residue discharged from sedimentation basin is dirty
Mud, concentration basin is discharged into by GRP pipe, excess sludge is 90- by the time of microwave radiation in GRP pipe
130s；3. the excess sludge after step 2 processing enters back into concentration basin and carries out gravity concentration processing, finally de- by centrifugation again
Water process, complete excess sludge dehydrating operations.
Foregoing invention is all to destroy sludge flco release sludge water content using microwave, to improve dehydrating effect, but sludge
Subsequently there is still a need for centrifugal dehydration or filter-press dehydration, moisture percentage in sewage sludge remain as 75% or so.
The content of the invention
It is an object of the invention to provide a kind of high concentration aqueous's ink waste liquor contamination thing minimizing technology, ink waste liquid is realized
The efficient removal of middle pollutant.
Another object of the present invention is to provide a kind of the efficiently de- of sludge caused by this kind of water-based ink liquid waste processing
Water method.
For achieving the above object, technical method of the invention is：
A kind of high concentration aqueous's ink liquid waste processing and its method for sludge dewatering, comprise the following steps：
Stirred reactor is pumped into after step a. water-based ink waste collections, inorganic acid and stirring reaction are added into waste liquid
3-10min, the pH value for adjusting waste liquid is acidity, separates out pollutant reaction, and lasting stirring makes sludge into pasty state；
Step b. sludge enters on dehydration strainer, and it is 70-90 DEG C to be heated to sludge temperature with microwave；
Step c. squeezes sludge, makes sludge dewatering, 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 is discharged into subsequent wastewater treatment system.
The pH value of waste liquid is that acidity refers to that pH is 1-2 in the step a；The inorganic acid is in sulfuric acid, hydrochloric acid or nitric acid
One kind.
Microwave width of heating is more than sludge blanket width on strainer in the step b.
It is mechanical expression that mode is squeezed in the step c.
Water-spraying control water is to deviate from water with the sludge after sludge heat exchange in reactor in the step d.
The present invention general principle be：
Water-based ink is referred to as ink, and it is mainly ground by water-soluble resin, organic pigment, solvent and related auxiliaries through compound
Mill is process, wherein binder of the water-soluble resin as ink, accounts for 30% of water-based ink or so.In water-soluble resin
Because water soluble acrylic resin is functional, it is widely used.Therefore for this kind of water-based ink waste water, after adding inorganic acid,
Water soluble acrylic resin's demulsification acid out can be made, so as to destroy the stability of water-based ink, water soluble acrylic resin breaks
After breast, pigment dispersion declines, and condenses, and forms flocculate together with resin, generates substantial amounts of sludge.When sludge heats
During to more than 70 DEG C, the softening of acrylic resin macromolecular, the parcel hydrophobic contaminant matter such as organic pigment, by Van der Waals force,
Automatic contraction occurs for the active forces such as hydrogen bond, intermolecular cohesion, is tightly combined molecule, and reduction combines moisture, by sludge
Poly- convergent force extruding internal moisture turns into Free water, readily removed, is dehydrated through mechanical expression, forms block sludge, dewatering speed
It is exceedingly fast.
Beneficial effects of the present invention：
A. this kind of high concentration aqueous's 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 small；
C. realize high concentration aqueous's ink waste liquor contamination thing remove it is integrated with sludge dewatering, its dewatering speed is fast,
Dewatering efficiency is high, can be handled with continuous production.
Brief description of the drawings
Fig. 1 is the processing technological flow schematic diagram of the inventive method.
Embodiment
The reference picture 1 of embodiment 1.
The invention provides a kind of high concentration aqueous's ink liquid waste processing and its method for sludge dewatering, using by water-based oil
The mineral acid acidified method of black waste liquid makes pollutant in waste liquid be transformed into hydrophobicity by hydrophily and form flocculate.Through microwave plus
Heat, pollutant is mutually assembled, soften shrink and squeeze solidification dehydration form block sludge.The present invention realizes water-based ink and given up
With sludge dewatering integrated, its dewatering speed is fast for liquid processing, and dewatering efficiency height, moisture percentage in sewage sludge can be reduced to less than 40%, and
It can be handled with continuous production.It is illustrated referring in particular to accompanying drawing 1.
Stirred reactor will be pumped into after water-based ink waste collection, inorganic acid and stirring reaction is then added into waste liquid,
The pH value for adjusting waste liquid is acidity, separates out pollutant, and lasting stirring makes sludge into pasty state；Sludge enters on dehydration strainer with micro-
Press dewatering after Wave heating, surface is set quickly to cool down to dewatered sludge water spray；Sludge takes off Chinese effluent, carries out subsequent treatment, takes
Dewatered sludge on lower filter belt, natural desiccation.
The invention provides a kind of high concentration aqueous's ink liquid waste processing and its method for sludge dewatering, mainly including following
Step：
Step a. is by brown water-based 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 into waste liquid, stirs 5min, the pH value for adjusting waste liquid is 1-2, is made
Pollutant separates out, and lasting stirring makes sludge into pasty state；
Step b. sludge enters on dehydration strainer, is heated using microwave, sludge is warming up to 78 DEG C, sludge adds through microwave
Mutually assemble after heat, soften contraction；
Step c. squeezes sludge, makes sludge dewatering, and abjection water carries 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, cooling water be utilize with
Abjection water in reactor after sludge heat exchange；
Step e. removes dewatered sludge on strainer, natural desiccation, and sludge abjection water is discharged into aftertreatment systems.
Handled using the inventive method, with microwave heating again through press dewatering after this kind of brown water-based ink waste liquid acid out,
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 knot
Structure is fine and close, natural desiccation.It the method achieve the integration of high concentration aqueous's ink liquid waste processing and sludge dewatering.
Embodiment 2
Stirred reactor will be pumped into after water-based ink waste collection, inorganic acid is then added into waste liquid and is stirred, adjusted
The pH value of waste liquid is acidity, separates out pollutant, and lasting stirring makes sludge into pasty state；Sludge enters on dehydration strainer and added with microwave
Press dewatering after heat, surface is set quickly to cool down to sludge water spray；Sludge takes off Chinese effluent, carries out subsequent treatment, removes on strainer
Dewatered sludge, natural desiccation.
The invention provides a kind of high concentration aqueous's ink liquid waste processing and its method for sludge dewatering, mainly including following
Step：
Step a. is by black mixing water-based 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 into waste liquid, stirs 8min, the pH value for adjusting waste liquid is 1-
2, separate out pollutant, lasting stirring makes sludge into pasty state；
Step b. sludge enters on dehydration strainer, is heated using microwave, sludge is warming up to 80 DEG C, sludge adds through microwave
Mutually assemble after heat, soften contraction；
Step c. squeezes sludge, makes sludge dewatering, and abjection water carries out heat exchange with sludge in stirred reactor, and preheating is dirty
Mud；
Step d. makes sludge be quickly cooled to surface temperature less than 65 DEG C, cooling water is to utilize heat to sludge water-spraying control
Abjection water after exchange；
Step e. removes dewatered sludge on strainer, natural desiccation, and sludge abjection water is discharged into aftertreatment systems.
Handled using the inventive method, heated after this kind of black mixing water-based ink waste liquid acid out with microwave, then through squeezing
Dehydration, waste liquid CODCrClearance reaches more than 92%, and chroma removal rate is up to more than 99%.It the method achieve high concentration aqueous's oil
Black 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 less than
40%, sludge structure is fine and close, natural desiccation.
Claims (1)
1. a kind of high concentration aqueous's ink liquid waste processing and its method for sludge dewatering, comprise the following steps：
Stirred reactor is pumped into after step a. water-based ink waste collections, inorganic acid and stirring reaction 3- are added into waste liquid
10min, the pH values for adjusting waste liquid are acidity, separate out pollutant reaction, and lasting stirring makes sludge into pasty state；
Step b. sludge enters on dehydration strainer, heats sludge with microwave, sludge temperature reaches 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；
Step e. removes sludge on strainer, and abjection water is discharged into subsequent wastewater treatment system；
PH values are that acidity refers to that pH is 1-2 in the step a, and microwave heating region width is more than dirt in the step b
Mud layer width, mode of squeezing in step c is mechanical expression；
Water-spraying control water is and the abjection water after sludge heat exchange in the step d.
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| CN201410185517.2A CN105084576B (en) | 2014-05-05 | 2014-05-05 | A kind of high concentration aqueous's ink liquid waste processing and its method for sludge dewatering |
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| CN201410185517.2A CN105084576B (en) | 2014-05-05 | 2014-05-05 | A kind of high concentration aqueous's ink liquid waste processing and its method for sludge dewatering |
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| CN105084576B true CN105084576B (en) | 2017-12-01 |
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|---|---|---|---|---|
| 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 |
| CN101665376A (en) * | 2009-09-11 | 2010-03-10 | 李春泉 | Method for treating and comprehensively utilizing sludge after sewage treatment |
| CN103466839A (en) * | 2013-09-26 | 2013-12-25 | 东莞玖龙纸业有限公司 | Ink wastewater treatment method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN101665376A (en) * | 2009-09-11 | 2010-03-10 | 李春泉 | Method for treating and comprehensively utilizing sludge after sewage treatment |
| CN103466839A (en) * | 2013-09-26 | 2013-12-25 | 东莞玖龙纸业有限公司 | Ink wastewater treatment method |
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