CN106758464A - A kind of Solid content recovery method of papermaking paint waste water - Google Patents
A kind of Solid content recovery method of papermaking paint waste water Download PDFInfo
- Publication number
- CN106758464A CN106758464A CN201611122917.4A CN201611122917A CN106758464A CN 106758464 A CN106758464 A CN 106758464A CN 201611122917 A CN201611122917 A CN 201611122917A CN 106758464 A CN106758464 A CN 106758464A
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- China
- Prior art keywords
- solid content
- calcium carbonate
- solution
- grinding
- recovery method
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Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/01—Waste products, e.g. sludge
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/675—Oxides, hydroxides or carbonates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/26—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof
- C02F2103/28—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Paper (AREA)
Abstract
The present invention proposes a kind of Solid content recovery method of papermaking paint waste water, comprises the following steps：S1, coating waste-water remove impurity by screening machine, send into settling tank；S2, to flocculant is added in coating waste-water, the Solid content in coating waste-water is deposited to settling tank bottom；The middle tub of agitator is provided with the Solid content feeding that S3, collection settle down, to NaOH, dispersant and grinding calcium carbonate solution are added in middle tub successively, calcium carbonate total solution is obtained, the solid content of the Solid content of the solid content than settling down of grinding calcium carbonate solution is high；S4, by calcium carbonate total solution grinding, reclaim grinding after solution.The present invention effectively reduces the viscosity of coating solution, dispersiveness and grinding efficiency are improve, and the coating solution solid content for reclaiming has reached the high concentration suitable for paper technology, solves pipeline and holds susceptible to plugging problem, the input of saving equipment, greatly reduces process costs.
Description
Technical field
The invention belongs to paper waste recovery technology field, more particularly to a kind of Solid content recovery side of papermaking paint waste water
Method.
Background technology
Coating paper is a kind of high-grade printing, and it is that a coating is coated on body paper, paper is had good light
Learn property and printing performance etc..The production process of coating paper includes producing the Paint Preparation System of coating, and often prepares once
A collection of coating is finished on coating and paper machine, the substantial amounts of cleaning cleaned to Paint Preparation System, thus produced is intended to
Waste liquid.The waste water that cleaning dope pipeline, groove are produced in paper-making industry, often containing a certain amount of Solid content, its main component is
Calcium carbonate, therefore it is environmental protection, an economic way in paper-making industry that the Solid content recovery of waste water is come into operation again.Prior art
In, typically using following technological process：(1) coating waste-water (or can also add other coating waste residues) feeding settling tank is first collected；
(2) and then to flocculant such as PB1 gene, PAMC PAM etc. is added in waste water, containing admittedly in waste water is made
Thing is deposited to settling tank bottom；(3) Solid content for settling down is collected, then sends to stirring, and grinding turns into calcium carbonate soln；(4)
Calcium carbonate soln is sent into centrifuge separating and dehydrating, its concentration is improved to paper technology can be applied to；(5) improved to concentration
Calcium carbonate soln addition dispersant and NaOH afterwards makes its not free settling stable in properties.Its major defect is：Due to second step plus
Flocculant, the viscosity of calcium carbonate soln it is high and also before to final step calcium carbonate can Continuous Settlement, so adding point
Conveying aspect before powder can have any problem, and easily block, and come inconvenient to operation and cleaning band.
The content of the invention
Mirror, object of the present invention is to provide a kind of Solid content recovery method of papermaking paint waste water, is not only solved with this
Determine above mentioned problem, and reduced step with centrifugal separation, significantly less process costs.
To achieve the above object, the technical proposal of the invention is realized in this way：
A kind of Solid content recovery method of papermaking paint waste water, comprises the following steps：
S1, coating waste-water remove impurity by screening machine, send into settling tank；
S2, to flocculant is added in coating waste-water, the Solid content in coating waste-water is deposited to settling tank bottom；
The middle tub of agitator is provided with the Solid content feeding that S3, collection settle down, to adding successively in middle tub
Plus NaOH, dispersant and grinding calcium carbonate solution, calcium carbonate total solution is obtained, the solid content of grinding calcium carbonate solution is than under sedimentation
The solid content of the Solid content come is high；
S4, by calcium carbonate total solution grinding, reclaim grinding after solution.
Further, in the step S3, the mixing speed of middle tub agitator is 1000~5000r/min.
Further, in the step S3, the solid content of grinding calcium carbonate solution is 55~98%.
Further, in the step S3, the concentration of NaOH is 1.5~3.0Kg/BDT in calcium carbonate total solution.
Further, in the step S3, the concentration of dispersant is 4.5~6.5Kg/BDT in calcium carbonate total solution.
Further, in the step S3, the pH value of calcium carbonate total solution is 8~10.
Further, in the step S3, the addition manner of dispersant is point 4 additions, and each addition is dispersant
1/4 times of total amount of adding.
Further, in the step S2, the flocculant is PB1 gene or PAMC PAM.
Further, in the step S2, the flocculant of 400~600 mass PPM is contained in the coating waste-water.
Further, in the step S3, the dispersant is sodium metasilicate or polyacrylate.
Compared with prior art, beneficial effects of the present invention are：
Coating waste liquor recovery process of the present invention effectively reduces the viscosity of coating waste liquid, improves dispersiveness and grinding is imitated
Rate, and the calcium carbonate total solution solid content for reclaiming has reached the high concentration suitable for paper technology.Recovery process step of the present invention
In, because whole process is low viscous solution, solve pipeline and hold susceptible to plugging problem, reduce prior art using centrifuge from
The step of heart carries large arch dam, saves the input of equipment, greatly reduces process costs.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to that will make needed for embodiment description
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only the preferred embodiments of the present invention, for
For those of ordinary skill in the art, without having to pay creative labor, it can also be obtained according to these accompanying drawings
His accompanying drawing.
Fig. 1 provides a kind of Solid content recovery method process chart of papermaking paint waste water for the present invention；
Fig. 2 is the viscosity B coefficent curved line relation schematic diagram under each processing step treatment of the embodiment of the present invention 1 to 3.
Specific embodiment
Principle of the invention and feature are described below in conjunction with accompanying drawing, example is served only for explaining the present invention, and
It is non-for limiting the scope of the present invention.
Referring to Fig. 1, the present invention provides a kind of Solid content recovery method of papermaking paint waste water, comprises the following steps：
S1, coating waste-water first pass through the impurity such as a screening machine removing fiber and are re-fed into settling tank.
S2, in coating waste-water add flocculant such as PB1 gene, PAMC PAM etc., make coating
Solid content in waste water is deposited to settling tank bottom, containing the flocculant of 400~600 mass PPM in coating waste-water, after sedimentation
The viscosity of Solid content is initial viscosity.
S3, the Solid content for settling down collect be re-fed into be provided with middle the tub of agitator, mixing speed for 1000~
5000r/min, to adding NaOH, dispersant and grinding calcium carbonate solution in middle tub successively, grinding calcium carbonate solution is consolidated
The solid content of Solid content of the content than settling down is high, and the calcium carbonate total solution solids level concentration in middle tub is caused after addition
Bring up to suitable for paper technology, be kept stirring for, it is become not free settling to dispersant, NaOH is added in middle tub.
The liquid level of middle tub is designated as Y%, and the volume of middle tub is designated as Vm3；The solid of the Solid content for settling down contains
Amount is designated as X0%, the solid content of the new grinding calcium carbonate solution for adding is X1%；The calcium carbonate total solution solid content note of middle tub
It is X2The concentration of %, NaOH is C1Kg/BDT, the concentration of dispersant is C2Kg/BDT, wherein, BDT represents 1 ton of oven-dry weight (carbonic acid
Calcium total solution), remainder accounts for the mass percent of total amount after solid content is emulsion or coating is dried under prescribed conditions.In this
Between tub calcium carbonate total solution in,
NaOH additions (quality PPM)=(A × X1+V×X0×Y)×C1/1000
Dispersant addition (quality PPM)=(A × X1+V×X0×Y)×C2/1000
Recovery process proposed by the present invention, the solid content X of grinding calcium carbonate solution1% is preferably 55~98%, NaOH's
Concentration C1Kg/BDT is preferably 1.5~3.0Kg/BDT, the concentration C of dispersant2Kg/BDT is preferably 4.5~6.5Kg/BDT.
Wherein, after addition NaOH, the pH value of the calcium carbonate total solution in middle tub is 8~10.The addition side of dispersant
Formula is non-disposable addition manner, but with multi-step, in batches addition manner be added into middle tub, preferably divide 4
Secondary addition, each addition is 1/4 times of dispersant total amount of adding.
S4, concentration is raised after calcium carbonate soln send to grinding, grinding is reclaimed after terminating and is transferred to completion tub, is realized again
Utilize.
It is viscous corresponding to the Solid content for the settling down difference solid content without decentralized processing knowable to the data in table 1
Degree is different, and with the rising of calcium carbonate soln solid content, its viscosity is raised, therefore is unfavorable for the conveying of pump, easily causes blocking.
Table 1
| Sequence number | Solid content (%) | Viscosity (cPS) |
| The Solid content 1 for settling down | 18.2 | 303 |
| The Solid content 2 for settling down | 21.9 | 690 |
| The Solid content 3 for settling down | 28.8 | 1550 |
| The Solid content 4 for settling down | 34.01 | 2232 |
Below experiment is directed to the inventive method step S3, is carried out example 1 to embodiment 9.
Embodiment 1 is to embodiment 3
During step S3, the Solid content for settling down is collected and is re-fed into the interior middle tub for being provided with agitator, example 1 to reality
The solid content for applying the Solid content settled down in example 3 is respectively 21.9%, 28.8% and 34.01%, and mixing speed is 2000r/
Min, to adding NaOH, dispersant and grinding calcium carbonate solution in middle tub successively.PH=8 after addition NaOH, dispersant
Addition is 400PPM, and the solid content of the new grinding calcium carbonate solution for adding is 75%.
Embodiment 1 to the viscosity of embodiment 3 improves result as shown in table 2, and viscosity (unit is cPS) change curve is as schemed
Shown in 2.
Table 2
Embodiment 4 is to embodiment 6
During step S3, the Solid content for settling down is collected and is re-fed into the interior middle tub for being provided with agitator, example 4 to reality
The solid content for applying the Solid content settled down in example 6 is respectively 21.9%, 28.8% and 34.01%, and mixing speed is 3000r/
Min, to adding NaOH, dispersant and grinding calcium carbonate solution in middle tub successively.PH=9.2, dispersant after addition NaOH
Addition be 360PPM, the solid content of the new grinding calcium carbonate solution for adding is 55%.
It is as shown in table 3 that embodiment 4 to the viscosity (unit is cPS) of embodiment 6 improves result.
Table 3
Embodiment 7 is to embodiment 9
During step S3, the Solid content for settling down is collected and is re-fed into the interior middle tub for being provided with agitator, example 7 to reality
The solid content for applying the Solid content settled down in example 9 is respectively 21.9%, 28.8% and 34.01%, and mixing speed is 5000r/
Min, to adding NaOH, dispersant and grinding calcium carbonate solution in middle tub successively.PH=10 after addition NaOH, dispersant
Addition is 480PPM, and the solid content of the new grinding calcium carbonate solution for adding is 99%.
It is as shown in table 4 that embodiment 7 to the viscosity (unit is cPS) of embodiment 9 improves result.
Table 4
Can be seen that the present invention by table 2 to 4 and Fig. 2 increased tub in the middle of step S3 before step S4 grindings
Reason, adjustment NaOH and dispersant adding proportion, reduce viscosity, realize the waste residue by highly enriched viscosity higher than 2000cPS and drop
As little as viscosity 200cPS and following, successfully solves the obstacle of pipeline transportation.
Additionally, the present invention is before step S4 grindings are entered, it is heavy to be lifted by adding the calcium carbonate soln of higher concentration
The concentration of thing is dropped, to improve grinding efficiency, precipitation is prevented effectively from.The height of calcium carbonate soln solid content determines the effect of grinding
Rate, solid content is higher, and calcium carbonate granule is more with the collision opportunity of abrasive media, and calcium carbonate granule is also easier to be ground.
The height of calcium carbonate soln solid content determines the dispersive property after dispersant addition simultaneously.The present invention is before the milling by adding
The calcium carbonate soln of higher concentration lifts precipitum concentration, improves grinding efficiency, improves dispersive property, is prevented effectively from fortune
Precipitation during defeated.
Comparative example 1
Comparative example 1 is that dispersant in step 3 is disposable addition, its viscosity (unit with the difference of embodiment 1
Be cPS) reduce result it is as shown in table 5.
Table 5
The result of comparative example 1 shows that dispersant can preferably reduce calcium carbonate soln using multiple addition manner step by step
Viscosity.
Comparative example 2
Comparative example 2 uses the technological process of following general technology：
(1) coating waste-water feeding settling tank is first collected；
(2) and then to flocculant poly aluminium chloride PAC is added in waste water, the Solid content in waste water is made to be deposited to settling tank bottom
Portion；
(3) Solid content for settling down is collected, mixing speed is 2000r/min, grinding turns into calcium carbonate soln；
(4) calcium carbonate soln send into centrifuge separating and dehydrating, make its concentration improve to can be applied to paper technology, this
When viscosity for centrifugation after viscosity；
(5) calcium carbonate soln addition dispersant and NaOH after being improved to concentration make its not free settling stable in properties.
Its viscosity (unit is cPS) reduction result is as shown in table 6.
Table 6
By the calcium carbonate soln solid content only 25-30% obtained after step S2 sedimentations, paper technology is not reached sharp again
The need for, therefore to improve concentration.Existing process is that solution after mill is sent to centrifuge dewatering, and viscosity is easily caused after centrifugation
It is higher, it is unfavorable for the conveying of pipeline.And the inventive method is, into before step S4 grindings, higher concentration is added in solution
Calcium carbonate soln, and the step for be just added to dispersant and NaOH and it is become not free settling.Therefore, the present invention is returned
Skill knock off before the grinding, has just caused that calcium carbonate soln becomes not allowing free settling to facilitate conveying, and need not be centrifuged
Machine this equipment, substantially reduces investment of production, reduces process costs.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Within god and principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (10)
1. a kind of Solid content recovery method of papermaking paint waste water, it is characterised in that comprise the following steps：
S1, coating waste-water remove impurity by screening machine, send into settling tank；
S2, to flocculant is added in coating waste-water, the Solid content in coating waste-water is deposited to settling tank bottom；
The middle tub of agitator is provided with the Solid content feeding that S3, collection settle down, to being added successively in middle tub
NaOH, dispersant and grinding calcium carbonate solution, obtain calcium carbonate total solution, and the solid content ratio of grinding calcium carbonate solution settles down
Solid content solid content it is high；
S4, by calcium carbonate total solution grinding, reclaim grinding after solution.
2. the Solid content recovery method of papermaking paint waste water according to claim 1, it is characterised in that the step S3
In, the mixing speed of middle tub agitator is 1000~5000r/min.
3. the Solid content recovery method of papermaking paint waste water according to claim 1, it is characterised in that the step S3
In, the solid content of grinding calcium carbonate solution is 55~98%.
4. the Solid content recovery method of papermaking paint waste water according to claim 1, it is characterised in that the step S3
In, the concentration of NaOH is 1.5~3.0Kg/BDT in calcium carbonate total solution.
5. the Solid content recovery method of papermaking paint waste water according to claim 1, it is characterised in that the step S3
In, the concentration of dispersant is 4.5~6.5Kg/BDT in calcium carbonate total solution.
6. the Solid content recovery method of papermaking paint waste water according to claim 1, it is characterised in that the step S3
In, the pH value of calcium carbonate total solution is 8~10.
7. the Solid content recovery method of papermaking paint waste water according to claim 1, it is characterised in that the step S3
In, the addition manner of dispersant is point 4 additions, and each addition is 1/4 times of dispersant total amount of adding.
8. the Solid content recovery method of papermaking paint waste water according to claim 1, it is characterised in that the step S2
In, the flocculant is PB1 gene or PAMC PAM.
9. the Solid content recovery method of papermaking paint waste water according to claim 1, it is characterised in that the step S2
In, the flocculant of 400~600 mass PPM is contained in the coating waste-water.
10. the Solid content recovery method of papermaking paint waste water according to claim 1, it is characterised in that the step S3
In, the dispersant is sodium metasilicate or polyacrylate.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107445220A (en) * | 2017-08-22 | 2017-12-08 | 山东华泰纸业股份有限公司 | A kind of comprehensive utilization technique of art paper coating waste-water |
| CN108704342A (en) * | 2018-06-05 | 2018-10-26 | 崔雪柯 | A kind of papermaking station-service devil liquor recovery equipment |
| CN110694348A (en) * | 2019-10-28 | 2020-01-17 | 海南金海浆纸业有限公司 | System and method for dissociating waste residues of papermaking coating |
| CN112374633A (en) * | 2020-09-08 | 2021-02-19 | 金东纸业（江苏）股份有限公司 | Method and system for recycling coating wastewater |
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| CN101367589A (en) * | 2008-08-29 | 2009-02-18 | 北京盖雅技术中心有限公司 | Reutilization process for painting and coating pigment pf paper mill |
| CN104230036A (en) * | 2013-06-11 | 2014-12-24 | 金东纸业（江苏）股份有限公司 | Recycling technology of paint wastewater |
| CN104692558A (en) * | 2015-02-09 | 2015-06-10 | 金东纸业（江苏）股份有限公司 | Coating wastewater recycling method and application thereof |
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| CN1225144A (en) * | 1996-07-09 | 1999-08-04 | 阿尔发-凯尔塞特填料有限公司 | Method of reusing fillers and coating pigments used in paper, paperboard and cardboard manufacture |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107445220A (en) * | 2017-08-22 | 2017-12-08 | 山东华泰纸业股份有限公司 | A kind of comprehensive utilization technique of art paper coating waste-water |
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| CN108704342A (en) * | 2018-06-05 | 2018-10-26 | 崔雪柯 | A kind of papermaking station-service devil liquor recovery equipment |
| CN110694348A (en) * | 2019-10-28 | 2020-01-17 | 海南金海浆纸业有限公司 | System and method for dissociating waste residues of papermaking coating |
| CN112374633A (en) * | 2020-09-08 | 2021-02-19 | 金东纸业（江苏）股份有限公司 | Method and system for recycling coating wastewater |
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| CN106758464B (en) | 2018-08-24 |
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