CN113860459A - Water-saving method for producing bleached pulp fine dried noodle cardboard paper - Google Patents
Water-saving method for producing bleached pulp fine dried noodle cardboard paper Download PDFInfo
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- CN113860459A CN113860459A CN202111320128.2A CN202111320128A CN113860459A CN 113860459 A CN113860459 A CN 113860459A CN 202111320128 A CN202111320128 A CN 202111320128A CN 113860459 A CN113860459 A CN 113860459A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 239000000123 paper Substances 0.000 title claims abstract description 24
- 239000011111 cardboard Substances 0.000 title claims abstract description 19
- 235000012149 noodles Nutrition 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 182
- 239000006193 liquid solution Substances 0.000 claims abstract description 26
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 22
- 239000000440 bentonite Substances 0.000 claims abstract description 22
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 22
- 125000000129 anionic group Chemical group 0.000 claims abstract description 20
- 239000000725 suspension Substances 0.000 claims abstract description 16
- 239000003085 diluting agent Substances 0.000 claims abstract description 15
- 238000005189 flocculation Methods 0.000 claims abstract description 15
- 230000016615 flocculation Effects 0.000 claims abstract description 15
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 10
- 239000000835 fiber Substances 0.000 claims abstract description 10
- 238000005188 flotation Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000011084 recovery Methods 0.000 claims abstract description 8
- 238000010992 reflux Methods 0.000 claims abstract description 4
- 239000003712 decolorant Substances 0.000 claims description 11
- 238000004042 decolorization Methods 0.000 claims description 8
- 238000004064 recycling Methods 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 5
- 239000000706 filtrate Substances 0.000 claims description 4
- 230000003068 static effect Effects 0.000 claims description 3
- 238000001802 infusion Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 5
- 239000003795 chemical substances by application Substances 0.000 abstract description 3
- 239000012535 impurity Substances 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract description 3
- 239000002351 wastewater Substances 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 9
- 239000012792 core layer Substances 0.000 description 5
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 4
- 229920001131 Pulp (paper) Polymers 0.000 description 3
- 241000274582 Pycnanthus angolensis Species 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000003311 flocculating effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011087 paperboard Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 102000012739 Anion Transport Proteins Human genes 0.000 description 1
- 108010079442 Anion Transport Proteins Proteins 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- 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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- 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
-
- 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
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- Chemical & Material Sciences (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)
- Inorganic Chemistry (AREA)
- Paper (AREA)
Abstract
The invention relates to a water-saving method for producing bleached pulp fine dried noodle cardboard paper, which sequentially comprises the following steps of uniformly treating white water by a multi-disc fiber recovery machine, leading out the clear water and carrying out decoloring treatment, feeding the clear water into a shallow air flotation treatment, and refluxing the decolored clear water into a surface pulp production line of the bleached pulp fine dried noodle cardboard paper, wherein the water-saving method has the advantages that: because the polyaluminum chloride liquid solution, the bentonite suspension, the flocculation decolorizing agent liquid solution and the anionic polyacrylamide diluent are sequentially added into the clear water in the step two, the flocculation effect of fine fibers and colloidal substances in the clear water can be effectively improved, and under the action of shallow air flotation, the impurity separation in the clear water can be realized, the water quality of effluent is improved, and the turbidity removal rate of the clear water can reach more than 90 percent, therefore, the reutilization of the recovery of the white water can be realized, the clear water consumption in the production process is reduced, and the discharge of waste water is reduced.
Description
Technical Field
The invention relates to a water-saving method for producing bleached pulp fine dried noodle cardboard paper.
Background
Bleached pulp fine dried noodle linerboard is a linerboard with white surface and natural color at the bottom, and is usually produced by a three-layer or four-layer composite method, wherein the surface layer is partially bleached wood pulp and partially deinked pulp, the core layer is deinked pulp, the bottom layer is natural OCC pulp, white water for papermaking is related to the color of the pulp, white water of the surface core layer is white, white water of the bottom layer is yellow, the white water of the surface core layer is discharged to the bottom layer along with tailings of the surface core layer, but the white water of the bottom layer cannot be reused for the surface core layer, so that the white water of the surface layer is lack of water to be supplemented, the white water of the bottom layer overflows, the water quantity is unbalanced, and the water consumption per ton of the linerboard is large.
Disclosure of Invention
The invention aims to provide a water-saving method for producing bleached pulp fine dried noodle cardboard paper, which can recycle white water in the production process of the bleached pulp fine dried noodle cardboard paper and reduce the consumption of clear water in the whole production process.
In order to solve the technical problems, the invention is realized by the following technical scheme: a water-saving method for producing bleached pulp fine dried noodle cardboard paper is based on recovery processing of white water in the production of bleached pulp fine dried noodle cardboard paper, and sequentially comprises the following steps:
the method comprises the following steps: uniformly treating the redundant white water through a multi-disc fiber recycling machine to obtain ultra-clear white water, clear white water and turbid white water;
step two: leading out the white water obtained by the first step, and sequentially adding a polyaluminium chloride liquid solution, a bentonite suspension, a flocculation decolorant liquid solution and an anionic polyacrylamide diluent into the white water, wherein the addition amount of the polyaluminium chloride liquid solution in each ton of the white water is 30-50 g, the addition amount of the bentonite suspension in each ton of the white water is 1-1.5L, the addition amount of the flocculation decolorant liquid solution in each ton of the white water is 0.5-1 kg, the addition amount of the anionic polyacrylamide diluent in each ton of the white water is 5-20 g, the bentonite suspension comprises bentonite and water, and the mass ratio of the bentonite to the water is 1: 49-3: 97, the anionic polyacrylamide diluent comprises anionic polyacrylamide and water, and the mass ratio of the anionic polyacrylamide to the water is 1: 490-1: 240;
step three: sending the clear water treated in the step two into a shallow air flotation machine, mixing the clear water with compressed air, and realizing the decolorization of the clear water in a static state;
step four: and mixing the floated suspended matters after the third step of decolorization with the pulp to be used in the bottom pulp of the bleached pulp fine dried noodle cardboard paper, and refluxing the bleached clear water after the third step of decolorization to a surface pulp production line of the bleached pulp fine dried noodle cardboard paper.
Preferably, the ultra-clear white water obtained in the step one is collected by a first collecting tank, the clear white water obtained in the step one is collected by a second collecting tank, and the turbid white water obtained in the step one is collected by a third collecting tank.
Preferably, the second collecting tank is provided with a leading-out pipeline connected with the shallow air floatation machine, the leading-out pipeline is sequentially provided with a first feed inlet, a second feed inlet and a third feed inlet along the infusion direction, the leading-out pipeline is provided with a white water pump, the first feed inlet, the second feed inlet and the third feed inlet are all arranged at a feed inlet of the white water pump, the shallow air floatation machine comprises a circulating pump, and a liquid inlet of the circulating pump is provided with a fourth feed inlet.
Preferably, all be connected with the feed tank on first charge door, second charge door, third charge door and the fourth charge door, be equipped with the data plate on the feed tank.
Preferably, the first water collecting tank is connected with a spraying pipe.
Preferably, the shallow air flotation machine is connected with a filtrate cleaning tank.
In conclusion, the invention has the advantages that: the white water is treated uniformly by the multi-disc fiber recycling machine in the first step, the clear water is led out and decolorized in the second step, the clear water in the third step is sent into a shallow air floatation treatment, and the decolorized clear water flows back to a surface pulp production line of bleached pulp fine dried noodle box board paper, because polyaluminium chloride liquid solution, bentonite suspension, flocculation decolorizing agent liquid solution and anionic polyacrylamide diluent are sequentially added into the clear water in the second step, not only can the coagulation effect be increased, but also chromophoric substances in the clear water can be effectively removed, the flocculation effect of fine fibers and colloidal substances in the clear water can be effectively improved, and the clear water can be treated under the action of the shallow air floatation, so that the impurity separation in the clear water is realized, the water quality of the discharged water is improved, and the turbidity removal rate of the clear water can reach more than 90 percent, the method can realize the reutilization of white water recovery, reduce the clear water consumption in the production process and reduce the discharge of waste water, and secondly, because the white water is treated in the first step to obtain super clear water, clear water and turbid white water, on one hand, the clear water can be used for cleaning the fan blades of a plurality of discs, the clear water after cleaning can flow into the turbid white water, the turbid white water is used for the dilution water of the OCC heat dispersion slurry, and the super clear water is used for a paper machine, thereby improving the use efficiency of the treated white water.
Drawings
The invention will be further described with reference to the accompanying drawings in which:
fig. 1 is a schematic view showing a structure of white water recovery processing in the present invention.
Reference numerals:
1 multi-disc fiber recycling machine, 2 shallow air flotation machine, 3 first collecting tank, 4 second collecting tank, 5 third collecting tank, 6 leading-out pipeline, 7 first feed inlet, 8 second feed inlet, 9 third feed inlet, 10 white water pump, 11 circulating pump, 12 fourth feed inlet, 13 feed tank, 14 nameplate, 15 shower pipe, 16 clear filtrate tank.
Detailed Description
As shown in fig. 1, a water-saving method for producing bleached pulp liner cardboard paper is based on the recovery treatment of white water in the bleached pulp liner cardboard paper production, and the water-saving method sequentially comprises the following steps:
the method comprises the following steps: uniformly treating the redundant white water through a multi-disc fiber recycling machine 1 to obtain ultra-clear white water, clear white water and turbid white water;
step two: leading out the white water obtained by the first step, and sequentially adding a polyaluminium chloride liquid solution, a bentonite suspension, a flocculation decolorant liquid solution and an anionic polyacrylamide diluent into the white water, wherein the addition amount of the polyaluminium chloride liquid solution in each ton of the white water is 30-50 g, the addition amount of the bentonite suspension in each ton of the white water is 1-1.5L, the addition amount of the flocculation decolorant liquid solution in each ton of the white water is 0.5-1 kg, the addition amount of the anionic polyacrylamide diluent in each ton of the white water is 5-20 g, the bentonite suspension comprises bentonite and water, and the mass ratio of the bentonite to the water is 1: 49-3: 97, the anionic polyacrylamide diluent comprises anionic polyacrylamide and water, and the mass ratio of the anionic polyacrylamide to the water is 1: 490-1: 240;
step three: feeding the clear water treated in the step two into a shallow air flotation machine 2, mixing compressed air into the clear water, and decoloring the clear water in a static state;
step four: and mixing the floated suspended matters after the third step of decolorization with the pulp to be used in the bottom pulp of the bleached pulp fine dried noodle cardboard paper, and refluxing the bleached clear water after the third step of decolorization to a surface pulp production line of the bleached pulp fine dried noodle cardboard paper.
The white water is treated uniformly by the multi-disc fiber recycling machine in the first step, the clear water is led out and decolorized in the second step, the clear water in the third step is sent into a shallow air floatation treatment, and the decolorized clear water flows back to a surface pulp production line of bleached pulp fine dried noodle box board paper, because polyaluminium chloride liquid solution, bentonite suspension, flocculation decolorizing agent liquid solution and anionic polyacrylamide diluent are sequentially added into the clear water in the second step, not only can the coagulation effect be increased, but also chromophoric substances in the clear water can be effectively removed, the flocculation effect of fine fibers and colloidal substances in the clear water can be effectively improved, and the clear water can be treated under the action of the shallow air floatation, so that the impurity separation in the clear water is realized, the water quality of the discharged water is improved, and the turbidity removal rate of the clear water can reach more than 90 percent, the method can realize the reutilization of white water recovery, reduce the clear water consumption in the production process and reduce the discharge of waste water, and secondly, because the white water is treated in the first step to obtain super clear water, clear water and turbid white water, on one hand, the clear water can be used for cleaning the fan blades of a plurality of discs, the clear water after cleaning can flow into the turbid white water, the turbid white water is used for the dilution water of the OCC heat dispersion slurry, and the super clear water is used for a paper machine, thereby improving the use efficiency of the treated white water.
The ultra-clear white water obtained in the step one is collected through the first water collecting tank 3, the clear white water obtained in the step one is collected through the second water collecting tank 4, and the turbid white water obtained in the step one is collected through the third water collecting tank 5, so that the ultra-clear white water, the clear white water and the turbid white water can be independently collected, the interference among the ultra-clear white water, the clear white water and the turbid white water is avoided, and the treated ultra-clear white water, the clear white water and the turbid white water can be recycled.
The second water collecting tank 4 is provided with a leading-out pipeline 6 connected with the superficial layer air floatation machine 2, the leading-out pipeline 6 is sequentially provided with a first feed inlet 7, a second feed inlet 8 and a third feed inlet 9 along the transfusion direction, the leading-out pipeline is provided with a white water pump 10, the first feed inlet, the second feed inlet and the third feed inlet are all arranged at the feed inlet of the white water pump, the superficial layer air floatation machine comprises a circulating pump 11, the feed inlet of the circulating pump is provided with a fourth feed inlet 12, the feeding of the polymeric chlorinated aluminum liquid solution, the bentonite suspension, the flocculating decolorant liquid solution and the anionic polyacrylamide diluent can be realized independently, the mutual interference of the polymeric chlorinated aluminum liquid solution, the bentonite suspension, the flocculating decolorant liquid solution and the anionic polyacrylamide diluent is avoided, and the first feed inlet, the second feed inlet and the third feed inlet are arranged at the feed inlet of the white water pump, can ensure that the liquid solution of the polychlorinated aluminum, the bentonite suspension and the liquid solution of the flocculation decolorant can be uniformly mixed along with the flow of the clear water, improve the mixing time of the liquid solution of the polychlorinated aluminum, the bentonite suspension, the liquid solution of the flocculation decolorant and the clear water, thereby ensuring the decoloration quality of the clear water, secondly, a fourth charging hole is arranged at the liquid inlet of the circulating pump, anion polyacrylamide diluent is added into the clear water through the fourth charging hole, the white water is fully mixed with the clear water through a circulating pump, the first feed inlet 7, the second feed inlet 8, the third feed inlet 9 and the fourth feed inlet are all connected with a feed box 13, be equipped with data plate 14 on the feed tank 13, the continuity of polyaluminium chloride, flocculation decolorant and anion polyacrylamide feed can be ensured in the setting of feed tank 13, and the setting of data plate 14 makes things convenient for operating personnel to operate.
The first water collecting tank 3 is connected with a spraying pipe 15, the obtained ultra-clear water can be treated and used for high-pressure spraying and low-pressure spraying of a paper machine, the shallow air flotation machine 2 is connected with a clear filtrate tank 16, the clear water treated by the shallow air flotation machine 2 can be collected and treated in a unified mode, transfer of the clear water is facilitated, and waste of the clear water during recycling is reduced.
Other embodiments of the present invention than the preferred embodiments described above will be apparent to those skilled in the art from the present invention, and various changes and modifications can be made therein without departing from the spirit of the present invention as defined in the appended claims.
Claims (6)
1. A water-saving method for producing bleached pulp liner cardboard paper is characterized in that: based on the recovery treatment of white water in the production of bleached pulp fine dried noodle cardboard paper, the water-saving method sequentially comprises the following steps:
the method comprises the following steps: uniformly treating the redundant white water through a multi-disc fiber recycling machine to obtain ultra-clear white water, clear white water and turbid white water;
step two: leading out the white water obtained by the first step, and sequentially adding a polyaluminium chloride liquid solution, a bentonite suspension, a flocculation decolorant liquid solution and an anionic polyacrylamide diluent into the white water, wherein the addition amount of the polyaluminium chloride liquid solution in each ton of the white water is 30-50 g, the addition amount of the bentonite suspension in each ton of the white water is 1-1.5L, the addition amount of the flocculation decolorant liquid solution in each ton of the white water is 0.5-1 kg, the addition amount of the anionic polyacrylamide diluent in each ton of the white water is 5-20 g, the bentonite suspension comprises bentonite and water, and the mass ratio of the bentonite to the water is 1: 49-3: 97, the anionic polyacrylamide diluent comprises anionic polyacrylamide and water, and the mass ratio of the anionic polyacrylamide to the water is 1: 490-1: 240;
step three: sending the clear water treated in the step two into a shallow air flotation machine, mixing the clear water with compressed air, and realizing the decolorization of the clear water in a static state;
step four: and mixing the floated suspended matters after the third step of decolorization with the pulp to be used in the bottom pulp of the bleached pulp fine dried noodle cardboard paper, and refluxing the bleached clear water after the third step of decolorization to a surface pulp production line of the bleached pulp fine dried noodle cardboard paper.
2. A water saving method for producing bleached pulp linerboard according to claim 1, wherein: collecting the ultra-clear white water obtained in the step one through a first water collecting tank, collecting the clear white water obtained in the step one through a second water collecting tank, and collecting the turbid white water obtained in the step one through a third water collecting tank.
3. A water saving method for producing bleached pulp linerboard according to claim 2, wherein: the second collecting tank is provided with a leading-out pipeline connected with the shallow air floatation machine, the leading-out pipeline is sequentially provided with a first feed inlet, a second feed inlet and a third feed inlet along the infusion direction, the leading-out pipeline is provided with a white water pump, the first feed inlet, the second feed inlet and the third feed inlet are all arranged at the feed inlet of the white water pump, the shallow air floatation machine comprises a circulating pump, and the feed inlet of the circulating pump is provided with a fourth feed inlet.
4. A water saving method for producing bleached pulp linerboard according to claim 3, wherein: all be connected with the feed tank on first charge door, second charge door, third charge door and the fourth charge door, be equipped with the data plate on the feed tank.
5. A water saving method for producing bleached pulp linerboard according to claim 2, wherein: and the first water collecting tank is connected with a spraying pipe.
6. A water saving method for producing bleached pulp linerboard according to claim 1, wherein: and the shallow air floatation machine is connected with a filtrate cleaning tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111320128.2A CN113860459A (en) | 2021-11-09 | 2021-11-09 | Water-saving method for producing bleached pulp fine dried noodle cardboard paper |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111320128.2A CN113860459A (en) | 2021-11-09 | 2021-11-09 | Water-saving method for producing bleached pulp fine dried noodle cardboard paper |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6099689A (en) * | 1998-02-17 | 2000-08-08 | Nalco Chemical Company | Production of paper and board products with improved retention, drainage and formation |
| CN101811764A (en) * | 2010-04-29 | 2010-08-25 | 南京神克隆科技有限公司 | Efficient ecological type sewage and sludge treating agent and preparation method thereof |
| TW201040354A (en) * | 2009-03-30 | 2010-11-16 | Jujo Paper Co Ltd | Method of manufacturing paper |
| CN104328707A (en) * | 2014-10-31 | 2015-02-04 | 玖龙纸业（太仓）有限公司 | White water treatment method and device for paper-making machine |
| CN204174472U (en) * | 2014-10-31 | 2015-02-25 | 玖龙纸业（太仓）有限公司 | A kind for the treatment of apparatus of paper machine white water |
| CN108423923A (en) * | 2018-02-12 | 2018-08-21 | 浙江和泓环保纸业有限公司 | A kind of recoverying and utilizing method of papermaking wastewater |
| CN113044942A (en) * | 2021-03-15 | 2021-06-29 | 武汉工程大学 | Bentonite coagulant and application thereof in wastewater treatment |
-
2021
- 2021-11-09 CN CN202111320128.2A patent/CN113860459A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6099689A (en) * | 1998-02-17 | 2000-08-08 | Nalco Chemical Company | Production of paper and board products with improved retention, drainage and formation |
| TW201040354A (en) * | 2009-03-30 | 2010-11-16 | Jujo Paper Co Ltd | Method of manufacturing paper |
| CN101811764A (en) * | 2010-04-29 | 2010-08-25 | 南京神克隆科技有限公司 | Efficient ecological type sewage and sludge treating agent and preparation method thereof |
| CN104328707A (en) * | 2014-10-31 | 2015-02-04 | 玖龙纸业（太仓）有限公司 | White water treatment method and device for paper-making machine |
| CN204174472U (en) * | 2014-10-31 | 2015-02-25 | 玖龙纸业（太仓）有限公司 | A kind for the treatment of apparatus of paper machine white water |
| CN108423923A (en) * | 2018-02-12 | 2018-08-21 | 浙江和泓环保纸业有限公司 | A kind of recoverying and utilizing method of papermaking wastewater |
| CN113044942A (en) * | 2021-03-15 | 2021-06-29 | 武汉工程大学 | Bentonite coagulant and application thereof in wastewater treatment |
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Application publication date: 20211231 |