CN103086534A - Whitewater processing method - Google Patents
Whitewater processing method Download PDFInfo
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- CN103086534A CN103086534A CN201110339330XA CN201110339330A CN103086534A CN 103086534 A CN103086534 A CN 103086534A CN 201110339330X A CN201110339330X A CN 201110339330XA CN 201110339330 A CN201110339330 A CN 201110339330A CN 103086534 A CN103086534 A CN 103086534A
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- plain boiled
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- boiled water
- whitewater
- flocculation agent
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Abstract
The invention relates to a whitewater processing method comprising the steps that: the pH value of the whitewater is regulated to 8-14; a certain amount of a mixed solution of a flocculating agent and a cationic polymer is added to the whitewater, until the total mass concentration of the flocculating agent and the cationic polymer in the whitewater is 1000-3000ppm. In the mixed solution, the mass concentration of the flocculating agent is 1-5%, and the mass concentration of the cationic polymer is 0.1-0.5%. According to the invention, papermaking whitewater is processed by using the whitewater processing method provided by the invention, and is then used in preparing slurry. Therefore, paper one-time retention rate and filler retention rate can be substantially improved, and paper bursting index and tensile strength index are improved to a certain extent. Also, when the slurry is used in papermaking, concentration, turbidity, conductivity, and COD of collected under-mesh whitewater are greatly reduced, such that whitewater recycling time can be increased.
Description
Technical field
The present invention relates to field of papermaking, relate in particular to a kind for the treatment of process of mthod of white water from paper making.
Background technology
Paper waste mainly comprises black liquor, middle section water and plain boiled water.Wherein, plain boiled water is in the sheet forming process, the water of deviating from from wet end and the press part of paper machine.Contain a large amount of fiber fines, mineral filler in plain boiled water, reach various chemical assistants, therefore, industry is back to plain boiled water the preparation of paper making pulp usually, so not only is conducive to environmental protection, and can rationally utilize various useful composition in plain boiled water to reduce material cost.But, if plain boiled water is without processing direct reuse, various materials in plain boiled water can constantly be accumulated along with the increase of cycle index, cause the increase of System Charges amount, polyelectrolyte to increase, the final action effect that affects chemical assistant, make retention rate and filler retention variation by the obtained paper of this slurry, become paper the quality problem such as holes to occur.
Summary of the invention
In view of this, be necessary to provide in fact a kind for the treatment of process of plain boiled water.
A kind of plain boiled water treatment process comprises step:
Adjusting to white water PH is 8-14;
The mixing solutions that adds a certain amount of flocculation agent and cationic polymers in this plain boiled water, in this mixing solutions, the mass concentration of flocculation agent is 1%～5%, the mass concentration of cationic polymers is 0.1%～0.5%, until in this plain boiled water, the total mass concentration of flocculation agent and cationic polymers is 1000ppm～3000ppm.
plain boiled water treatment process in the present invention makes flocculation agent play neutralization reaction with plain boiled water under alkaline condition and generates the oxyhydroxide flocs unit, in this flocculation physical efficiency dialogue water, suspended substance and chemical assistant adsorb, simultaneously, cationic polymers passes through long molecular chain electronegative material such as fiber fines in plain boiled water, fillers etc. connect together with the flocs unit that flocculation agent produces, when the plain boiled water after processing carries out handsheet after for the preparation of slurry again, because the suspended substance in plain boiled water and chemical assistant are adsorbed on the oxyhydroxide flocs unit of comparatively large vol more, therefore when becoming paper, wet end can remain in preferably in paper, thereby can obviously promote retention rate and the filler retention of the prepared paper of this slurry, burst index and tensile index to paper also have a certain upgrade.In addition, after the slurry handsheet, the concentration of collected machine water, turbidity, conductance and COD all reduce significantly, thereby are conducive to increase the reuse number of times of plain boiled water.
Embodiment
In the present invention, the treatment process of plain boiled water mainly comprises the following steps:
(1) adjusting to white water pH is 8-14;
(2) add the mixing solutions of a certain amount of flocculation agent and cationic polymers in this plain boiled water, in this mixing solutions, the mass concentration of flocculation agent is 1%～5%, the mass concentration of cationic polymers is 0.1%～0.5%, until in this plain boiled water, the total mass concentration of flocculation agent and cationic polymers is 1000ppm～3000ppm.
This flocculation agent can be any one or theys' such as poly-ferric chloride, polymerize aluminum chloride, bodied ferric sulfate, polymeric aluminum sulfate silicate mixture, and this cationic polymers is selected from any one or theys' such as cation polypropylene acyl ammonium, diallyldimethylammonium chloride, PEI, polymeric amide polyamines mixture.
Under alkaline condition, flocculation agent and plain boiled water play neutralization reaction and generate the oxyhydroxide flocs unit, and in this flocculation physical efficiency dialogue water, suspended substance and chemical assistant adsorb; Simultaneously, cationic polymers connects together the electronegative material in plain boiled water such as fiber fines, filler etc. by long molecular chain with the flocs unit that flocculation agent produces.when the plain boiled water after processing carries out handsheet after for the preparation of slurry again, due to the suspended substance in plain boiled water, chemical assistant, fiber fines, fillers etc. are adsorbed on the oxyhydroxide flocs unit of comparatively large vol more, therefore when becoming paper, wet end can remain in preferably in paper, not only make the retention rate of paper obtain better improvement, avoided paper holes phenomenon, and the turbidity of the plain boiled water that again generates of wet end, electric charge, conductance, COD (chemical oxygen demand (COD), be illustrated under strong acidic condition the required oxygen amount of organism in a certain amount of sewage of potassium dichromate oxidation, can roughly represent the organic content in sewage) etc. greatly reduce, be conducive to the reuse environmental protection of plain boiled water.
Below with specific embodiment, this plain boiled water treatment process is described further.
The water quality of pending plain boiled water sample is: PH=7.2, turbidity 1423NTU (NTU, nephelometric turbidity unit, instrument with incident light direction at an angle of 90 on measure the scattered light intensity of testing liquid), conductance 912 μ s/cm, COD 422mg/l, mass concentration 0.3%.
Embodiment one:
Get appropriate above-mentioned plain boiled water sample, stirring this plain boiled water sample with advancing slowly to add mass concentration is 0.05% NaOH solution, and regulating this plain boiled water sample pH value is 8; The mixing solutions that adds polymerize aluminum chloride and Polyacrylamide in this plain boiled water sample, in this mixing solutions, the mass concentration of polymerize aluminum chloride is 5%, the mass concentration of Polyacrylamide is 0.1%, mix until in this plain boiled water sample the total mass concentration of polymerize aluminum chloride and Polyacrylamide be 1000ppm.
Adding mass concentration in this plain boiled water is 1% slurry.In this enforcement, this slurry is comprised of 30% long fine chemical pulp and 70% short fiber chemical pulp, is appreciated that the present invention is not construed as limiting the concrete composition of slurry, can do to adapt to the composition of slurry according to real needs in other embodiments and adjust.Add the filler of over dry slurry 15% quality, the cationic starch of 1% quality and the cation polypropylene acyl ammonium of 0.05% quality successively in newly-generated slurry after being mixed.Filler in the present embodiment is grinding calcium carbonate, and certainly also replaceable in other embodiments is the filler of other kinds.To carry out handsheet after the slurry mixing and collect machine water.Measure the partial parameters of gained paper and collected machine water.
For ease of contrast, implement simultaneously a blank sample experiment, get the appropriate water quality plain boiled water identical with water quality in embodiment one, i.e. PH=7.2, turbidity 1423NTU, conductance 912 μ s/cm, COD 422mg/l, mass concentration 0.3%.Adding mass concentration in this plain boiled water is 1% slurry, this slurry is comprised of 30% long fine chemical pulp and 70% short fiber chemical pulp, adds the filling material grinding calcium carbonate of over dry slurry 15% quality, the cationic starch of 1% quality and the cation polypropylene acyl ammonium of 0.05% quality successively in newly-generated slurry after being mixed.To carry out handsheet after the slurry mixing and collect machine water.Measure the partial parameters of gained paper and collected machine water.
In embodiment one in the paper of gained and blank sample the partial parameters of gained paper contrast as follows:
| The paper parameter item | Embodiment one | Blank sample |
| Basic weight (g/m 2) | 72.2 | 72.6 |
| Burst index (Kpa.m 2/g) | 1.36 | 1.4 |
| Tensile index (Nm/g) | 26.2 | 26 |
| A retention rate (%) | 88 | 68 |
| Filler retention (%) | 62.6 | 36.6 |
(annotate: basic weight refers to measure the weight of every square metre of paper; Burst index, the paper that refers to measure certain area bear the peak pressure when breaking and the ratio of basic weight perpendicular to the even top straightening of paper; Tensile index refers to measure maximum tension that paper and cardboard can bear and the ratio of basic weight; A retention rate refers to measure the quality of solid matter in page and flow out the ratio of solid matter quality in paper pulp from head box; Filler retention refers to measure the packing quality that is retained in page and the ratio that adds packing quality in paper pulp.)
In embodiment one in the partial parameters of collected machine water and blank sample the partial parameters of collected machine water contrast as follows:
| The plain boiled water parameter item | Embodiment one | Blank sample |
| Mass concentration (%) | 0.11 | 0.33 |
| pH | 7.36 | 7.33 |
| Turbidity (NTU) | 465 | 1563 |
| Conductance (μ s/cm) | 656 | 1015 |
| COD(mg/l) | 223 | 432 |
Embodiment two:
Get appropriate above-mentioned plain boiled water sample, this plain boiled water sample being stirred and slowly add simultaneously mass concentration is that to regulate this plain boiled water sample pH value be 14 for 0.05% NaOH solution, the mixing solutions that adds polymerize aluminum chloride and Polyacrylamide in this plain boiled water sample, in this mixing solutions, the mass concentration of polymerize aluminum chloride is 1%, the mass concentration of Polyacrylamide is 0.5%, mix until in this plain boiled water sample the total mass concentration of polymerize aluminum chloride and Polyacrylamide be 3000ppm.
The slurry that adds mass concentration 1% to this plain boiled water, in this enforcement, this slurry is comprised of 30% long fine chemical pulp and 70% short fiber chemical pulp, be appreciated that the present invention is not construed as limiting the concrete composition of slurry, can do to adapt to the composition of slurry according to real needs in other embodiments and adjust.Add the filler of over dry slurry 15% quality, the cationic starch of 1% quality and the cation polypropylene acyl ammonium of 0.05% quality successively in newly-generated slurry after being mixed.Filler in the present embodiment is grinding calcium carbonate, and certainly also replaceable in other embodiments is the filler of other kinds.To carry out handsheet after the slurry mixing and collect machine water, measure the partial parameters of gained paper and collected machine water.
In embodiment two in the paper of gained and above-mentioned blank sample the partial parameters of gained paper contrast as follows:
| The paper parameter item | Embodiment two | Blank sample |
| Basic weight (g/m 2) | 73.1 | 72.6 |
| Burst index (Kpa.m 2/g) | 1.44 | 1.4 |
| Tensile index (Nm/g) | 26.3 | 26 |
| A retention rate (%) | 91.2 | 68 |
| Filler retention (%) | 71.8 | 36.6 |
In embodiment two in the partial parameters of collected machine water and blank sample the partial parameters of collected machine water contrast as follows:
| The plain boiled water parameter item | Embodiment two | Blank sample |
| Mass concentration (%) | 0.08 | 0.33 |
| pH | 7.46 | 7.33 |
| Turbidity (NTU) | 331 | 1563 |
| Conductance (μ s/cm) | 506 | 1015 |
| COD(mg/l) | 214 | 432 |
Embodiment three:
Get appropriate above-mentioned plain boiled water sample, stirring this plain boiled water sample with advancing slowly to add mass concentration is that to regulate this plain boiled water sample pH value be 11 for 0.05% NaOH solution, the mixing solutions that adds polymerize aluminum chloride and Polyacrylamide in this plain boiled water sample, in this mixing solutions, the mass concentration of polymerize aluminum chloride is 3%, the mass concentration of Polyacrylamide is 0.3%, mix until in this plain boiled water sample the total mass concentration of polymerize aluminum chloride and Polyacrylamide be 2000ppm.
Adding mass concentration to this plain boiled water is 1% slurry, in this enforcement, this slurry is comprised of 30% long fine chemical pulp and 70% short fiber chemical pulp, be appreciated that the present invention is not construed as limiting the concrete composition of slurry, can do to adapt to the composition of slurry according to real needs in other embodiments and adjust.Add the filler of over dry slurry 15% quality, the cationic starch of 1% quality and the cation polypropylene acyl ammonium of 0.05% quality successively in newly-generated slurry after being mixed.Filler in the present embodiment is grinding calcium carbonate, and certainly also replaceable in other embodiments is the filler of other kinds.To carry out handsheet after the slurry mixing and collect machine water, measure the partial parameters of gained paper and collected machine water.
In embodiment three in the paper of gained and above-mentioned blank sample the partial parameters of gained paper contrast as follows:
| The paper parameter item | Embodiment three | Blank sample |
| Basic weight (g/m 2) | 73.3 | 72.6 |
| Burst index (Kpa.m 2/g) | 1.44 | 1.4 |
| Tensile index (Nm/g) | 26.6 | 26 |
| A retention rate (%) | 87.3 | 68 |
| Filler retention (%) | 68.2 | 36.6 |
In embodiment three in the partial parameters of collected machine water and blank sample the partial parameters of collected machine water contrast as follows:
| The plain boiled water parameter item | Embodiment three | Blank sample |
| Concentration (Kg%) | 0.12 | 0.33 |
| pH | 7.41 | 7.33 |
| Turbidity (NTU) | 418 | 1563 |
| Conductance (μ s/cm) | 554 | 1015 |
| COD(mg/l) | 251 | 432 |
Can be found out by comparing of above each embodiment and blank sample, mthod of white water from paper making is by being used further to the preparation of slurry after the plain boiled water disposal methods in the present invention, can obviously promote retention rate and the filler retention of paper, burst index and the tensile index of paper also had a certain upgrade.In addition, after the slurry handsheet, the concentration of collected machine water, turbidity, conductance and COD all reduce significantly, thereby are conducive to increase the reuse number of times of plain boiled water.
Claims (7)
1. plain boiled water treatment process comprises step:
Adjusting to white water PH is 8-14;
The mixing solutions that adds a certain amount of flocculation agent and cationic polymers in this plain boiled water, in this mixing solutions, the mass concentration of flocculation agent is 1%～5%, the mass concentration of cationic polymers is 0.1%～0.5%, until in this plain boiled water, the mass concentration of flocculation agent and cationic polymers is 1000ppm～3000ppm.
2. plain boiled water treatment process as claimed in claim 1 is characterized in that: this flocculation agent is selected from poly-ferric chloride, polymerize aluminum chloride, bodied ferric sulfate, polymeric aluminum sulfate silicate any one or theys' mixture.
3. plain boiled water treatment process as claimed in claim 1 is characterized in that: this cationic polymers is selected from cation polypropylene acyl ammonium, diallyldimethylammonium chloride, PEI, polymeric amide polyamines any one or theys' mixture.
4. plain boiled water treatment process as claimed in claim 1, it is characterized in that: this flocculation agent is polymerize aluminum chloride, this cationic polymers is cation polypropylene acyl ammonium.
5. plain boiled water treatment process as claimed in claim 4, it is characterized in that: in this mixing solutions, the mass concentration of polymerize aluminum chloride is 5%, the mass concentration of Polyacrylamide is 0.1%, and in final plain boiled water, the total mass concentration of this flocculation agent and cationic polymers is 1000ppm.
6. plain boiled water treatment process as claimed in claim 4, it is characterized in that: in this mixing solutions, the mass concentration of polymerize aluminum chloride is 3%, the mass concentration of Polyacrylamide is 0.3%, and in final plain boiled water, the total mass concentration of this flocculation agent and cationic polymers is 2000ppm.
7. plain boiled water treatment process as claimed in claim 4, it is characterized in that: in this mixing solutions, the mass concentration of polymerize aluminum chloride is 1%, the mass concentration of Polyacrylamide is 0.5%, and in final plain boiled water, the total mass concentration of this flocculation agent and cationic polymers is 3000ppm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110339330.XA CN103086534B (en) | 2011-10-31 | 2011-10-31 | Whitewater processing method |
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| CN201110339330.XA CN103086534B (en) | 2011-10-31 | 2011-10-31 | Whitewater processing method |
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| CN103086534A true CN103086534A (en) | 2013-05-08 |
| CN103086534B CN103086534B (en) | 2015-02-18 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104310683A (en) * | 2014-09-18 | 2015-01-28 | 林连山 | Development and control method of papermaking wastewater |
| CN104891584A (en) * | 2015-05-05 | 2015-09-09 | 邱林 | Papermaking sewage treatment agent |
| CN105036275A (en) * | 2015-08-28 | 2015-11-11 | 邓忆凯 | Composite flocculant for wastewater treatment and preparation method thereof |
| CN105735024A (en) * | 2016-02-22 | 2016-07-06 | 金东纸业（江苏）股份有限公司 | Treatment method for coating waste water and coating broke |
| CN107935230A (en) * | 2017-10-30 | 2018-04-20 | 中国制浆造纸研究院有限公司 | A kind of composite seal paper machine white water ceramics membrane processing method |
| CN112299576A (en) * | 2020-11-16 | 2021-02-02 | 青岛中泽环保科技有限公司 | Ion remover for removing calcium and magnesium ions in papermaking white water and sewage |
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| EP0310264A2 (en) * | 1987-09-28 | 1989-04-05 | Georgia-Pacific Corporation | Paper conversion plant waste treatment process |
| CN1919753A (en) * | 2006-09-08 | 2007-02-28 | 臧立新 | Treatment reuse technique for paper-making white-water |
| CN101691719A (en) * | 2009-10-15 | 2010-04-07 | 金东纸业（江苏）股份有限公司 | Control agent of dissolved and colloidal substances in paper machine circulating off-machine water and use method thereof |
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2011
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| EP0310264A2 (en) * | 1987-09-28 | 1989-04-05 | Georgia-Pacific Corporation | Paper conversion plant waste treatment process |
| CN1919753A (en) * | 2006-09-08 | 2007-02-28 | 臧立新 | Treatment reuse technique for paper-making white-water |
| CN101691719A (en) * | 2009-10-15 | 2010-04-07 | 金东纸业（江苏）股份有限公司 | Control agent of dissolved and colloidal substances in paper machine circulating off-machine water and use method thereof |
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| 吴香波 等: "物理化学法在造纸白水深度处理中的应用", 《工业水处理》, vol. 29, no. 2, 28 February 2009 (2009-02-28), pages 41 - 43 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104310683A (en) * | 2014-09-18 | 2015-01-28 | 林连山 | Development and control method of papermaking wastewater |
| CN104891584A (en) * | 2015-05-05 | 2015-09-09 | 邱林 | Papermaking sewage treatment agent |
| CN105036275A (en) * | 2015-08-28 | 2015-11-11 | 邓忆凯 | Composite flocculant for wastewater treatment and preparation method thereof |
| CN105735024A (en) * | 2016-02-22 | 2016-07-06 | 金东纸业（江苏）股份有限公司 | Treatment method for coating waste water and coating broke |
| CN105735024B (en) * | 2016-02-22 | 2018-01-09 | 金东纸业（江苏）股份有限公司 | The processing method of coating waste-water and coated broke |
| CN107935230A (en) * | 2017-10-30 | 2018-04-20 | 中国制浆造纸研究院有限公司 | A kind of composite seal paper machine white water ceramics membrane processing method |
| CN112299576A (en) * | 2020-11-16 | 2021-02-02 | 青岛中泽环保科技有限公司 | Ion remover for removing calcium and magnesium ions in papermaking white water and sewage |
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| CN103086534B (en) | 2015-02-18 |
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