CN102002878A - Method for recovering slurry from papermaking sewage - Google Patents
Method for recovering slurry from papermaking sewage Download PDFInfo
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- CN102002878A CN102002878A CN 201010514376 CN201010514376A CN102002878A CN 102002878 A CN102002878 A CN 102002878A CN 201010514376 CN201010514376 CN 201010514376 CN 201010514376 A CN201010514376 A CN 201010514376A CN 102002878 A CN102002878 A CN 102002878A
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- papermaking wastewater
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- sewage
- screenings
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Abstract
The invention belongs to the technical field of papermaking sewage treatment, and particularly relates to a method for recovering slurry from papermaking sewage. The method comprises the following steps of: a, adding a flocculating agent into papermaking sewage of a mixer, and mixing fully to generate floccules; b, inputting the floccules to an inclined concentration section of a belt-type pressure filter by a feeding device, moving with top fabrics under the action of gravity, and dehydrating free water quickly to form slurry residues; c, conveying the slurry residues dehydrated by the inclined concentration section to a gravity dehydration section of the belt-type pressure filter to dehydrate further, and feeding the dehydrated slurry residues to an 'S'-shaped squeezing section to dehydrate the slurry residues again; and d, scraping the slurry residues off by a scraper to obtain slurry for reproduction. In the method, the papermaking sewage is treated by using the belt-type pressure filter, and the slurry in the papermaking sewage is recycled, so the sewage discharge capacity is reduced, resources are saved, and the cost is reduced.
Description
Technical field
The invention belongs to the technology of treatment of papermaking wastewater field, be specifically related to a kind of method that from papermaking wastewater, reclaims slurry
Background technology
Paper industry is polluted the most serious with water, displacement is big, and the about water of general slurry per ton and paper is more than 300 tons.Content of organics height in these papermaking wastewaters, biochemical oxygen demand (BOD) (BOD) is high, suspended matter (SS) is many, contain toxic substance, be with look that peculiar smell is arranged, accumulation all the year round, suspended matter can silt the harbour, riverbed up, and the poisonous foul smell of generation hydrogen sulfide, influence urbanite water consumption and environmental landscape, so need handle to papermaking wastewater.
Handle if directly papermaking wastewater is drained into sewage plant, not only can produce many conveying costs, but also can increase the pressure of sewage plant.Find that by analysis contain a large amount of slurries in the papermaking wastewater, slurry can also further reclaim and be used for producing again.
Summary of the invention
The purpose of this invention is to provide a kind of method that from papermaking wastewater, reclaims slurry, reduce blowdown flow rate, economize on resources, reduce cost.
The object of the present invention is achieved like this.
A kind of method that reclaims slurry from papermaking wastewater may further comprise the steps:
A, in the papermaking wastewater of blender, add flocculant, fully mix, produce floccule body.
B, floccule body under the effect of gravity, along with veil moves, slough free water rapidly through the tilting enriching section of charging gear input belt filter press, form screenings.
C, the screenings after the dehydration of tilting enriching section, the gravity dehydration section that is delivered to belt filter press is further dewatered, and feeds the serpentine squeeze section then, impels screenings to dewater again.
D, by scraper screenings is scraped at last, obtain the slurry that is used for producing again.
Wherein, the sewage that papermaking wastewater is discharged for the craft paper workshop among the described step a also can be the sewage that other paper machine room is discharged.
Wherein, flocculant is a polyacrylamide among the described step a, and consumption is that papermaking wastewater per ton adds 1～5kg, can certainly be the flocculant of other kind.
Wherein, the angle of inclination of described step b medium dip formula enriching section is 4 °, also can adjust as required.
Wherein, the cylinder that the serpentine squeeze section adopts diameter to reduce gradually among the described step c.
Wherein, the sewage that takes off among described step b and the step c is sent into the Sewage Plant processing through blow-off line.
Beneficial effect of the present invention is: this kind reclaims the method for slurry from papermaking wastewater, may further comprise the steps: a, add flocculant in the papermaking wastewater of blender, fully mix, produce floccule body; B, floccule body under the effect of gravity, along with veil moves, slough free water rapidly through the tilting enriching section of charging gear input belt filter press, form screenings; C, the screenings after the dehydration of tilting enriching section, the gravity dehydration section that is delivered to belt filter press is further dewatered, and feeds the serpentine squeeze section then, impels screenings to dewater again; D, by scraper screenings is scraped at last, obtain the slurry that is used for producing again.The present invention handles papermaking wastewater with belt filter press, and the reuse slurry reduces blowdown flow rate, economizes on resources, and reduces cost.
The specific embodiment:
The invention will be further described with embodiment below, but practical range of the present invention is not limited to this.
Embodiment 1.
A kind of method that reclaims slurry from papermaking wastewater may further comprise the steps:
A, add the flocculant polyacrylamide in the papermaking wastewater of blender, papermaking wastewater per ton adds 1kg, fully mixes, and produces floccule body, and wherein papermaking wastewater is the sewage that the craft paper workshop is discharged.
B, floccule body are through the tilting enriching section of charging gear input belt filter press, and the angle of inclination of tilting enriching section is 4 °, under the effect of gravity, floccule body is along with veil moves, slough free water rapidly, form screenings, the sewage that takes off is sent into Sewage Plant through blow-off line and is handled.
C, the screenings after the dehydration of tilting enriching section, the gravity dehydration section that is delivered to belt filter press is further dewatered, feed the serpentine squeeze section then, the serpentine squeeze section is made up of several different-diameter rollers, under the effect of strainer tension force, makes it serpentine and holds extruding, roller diameter is by diminishing greatly gradually, form certain pressure gradient, make screenings be subjected to becoming big expressing process gradually and dewatering by pressure is little, the sewage that takes off is sent into Sewage Plant through blow-off line and is handled.
D, by scraper screenings is scraped at last, obtain the slurry that is used for producing again.
Embodiment 2.
A kind of method that reclaims slurry from papermaking wastewater may further comprise the steps:
A, add flocculant poly aluminium chloride in the papermaking wastewater of blender, papermaking wastewater per ton adds 3kg, fully mixes, and produces floccule body, and wherein papermaking wastewater is the sewage that the craft paper workshop is discharged.
B, floccule body are through the tilting enriching section of charging gear input belt filter press, and the angle of inclination of tilting enriching section is 5 °, under the effect of gravity, floccule body is along with veil moves, slough free water rapidly, form screenings, the sewage that takes off is sent into Sewage Plant through blow-off line and is handled.
C, the screenings after the dehydration of tilting enriching section, the gravity dehydration section that is delivered to belt filter press is further dewatered, feed the serpentine squeeze section then, the serpentine squeeze section is made up of several different-diameter rollers, under the effect of strainer tension force, makes it serpentine and holds extruding, roller diameter is by diminishing greatly gradually, form certain pressure gradient, make screenings be subjected to becoming big expressing process gradually and dewatering by pressure is little, the sewage that takes off is sent into Sewage Plant through blow-off line and is handled;
D, by scraper screenings is scraped at last, obtain the slurry that is used for producing again.
Embodiment 3.
A kind of method that reclaims slurry from papermaking wastewater may further comprise the steps:
A, add the flocculant polyacrylamide in the papermaking wastewater of blender, papermaking wastewater per ton adds 5kg, fully mixes, and produces floccule body.
B, floccule body are through the tilting enriching section of charging gear input belt filter press, and the angle of inclination of tilting enriching section is 4 °, under the effect of gravity, floccule body is along with veil moves, slough free water rapidly, form screenings, the sewage that takes off is sent into Sewage Plant through blow-off line and is handled.
C, the screenings after the dehydration of tilting enriching section, the gravity dehydration section that is delivered to belt filter press is further dewatered, feed the serpentine squeeze section then, the serpentine squeeze section is made up of several different-diameter rollers, under the effect of strainer tension force, makes it serpentine and holds extruding, roller diameter is by diminishing greatly gradually, form certain pressure gradient, make screenings be subjected to becoming big expressing process gradually and dewatering by pressure is little, the sewage that takes off is sent into Sewage Plant through blow-off line and is handled.
D, by scraper screenings is scraped at last, obtain the slurry that is used for producing again.
The above only is a better embodiment of the present invention, so all equivalences of doing according to the described structure of patent claim of the present invention, feature and principle change or modify, is included in the patent claim of the present invention.
Claims (6)
1. method that reclaims slurry from papermaking wastewater is characterized in that: may further comprise the steps:
A, in the papermaking wastewater of blender, add flocculant, fully mix, produce floccule body;
B, floccule body under the effect of gravity, along with veil moves, slough free water rapidly through the tilting enriching section of charging gear input belt filter press, form screenings;
C, the screenings after the dehydration of tilting enriching section, the gravity dehydration section that is delivered to belt filter press is further dewatered, and feeds the serpentine squeeze section then, impels screenings to dewater again;
D, by scraper screenings is scraped at last, obtain the slurry that is used for producing again.
2. a kind of method that reclaims slurry from papermaking wastewater according to claim 1 is characterized in that: the sewage that papermaking wastewater is discharged for the craft paper workshop among the described step a.
3. a kind of method that from papermaking wastewater, reclaims slurry according to claim 1, it is characterized in that: flocculant is a polyacrylamide among the described step a, consumption is that papermaking wastewater per ton adds 1～5kg.
4. a kind of method that reclaims slurry from papermaking wastewater according to claim 1, it is characterized in that: the angle of inclination of described step b medium dip formula enriching section is 4 °.
5. a kind of method that reclaims slurry from papermaking wastewater according to claim 1, it is characterized in that: the serpentine squeeze section adopts the cylinder that diameter reduces gradually among the described step c.
6. a kind of method that reclaims slurry from papermaking wastewater according to claim 1 is characterized in that: the sewage that takes off among described step b and the step c is sent into Sewage Plant through blow-off line and is handled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105143766A CN102002878B (en) | 2010-10-21 | 2010-10-21 | Method for recovering slurry from papermaking sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105143766A CN102002878B (en) | 2010-10-21 | 2010-10-21 | Method for recovering slurry from papermaking sewage |
Publications (2)
| Publication Number | Publication Date |
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| CN102002878A true CN102002878A (en) | 2011-04-06 |
| CN102002878B CN102002878B (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010105143766A Active CN102002878B (en) | 2010-10-21 | 2010-10-21 | Method for recovering slurry from papermaking sewage |
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| CN (1) | CN102002878B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107119484A (en) * | 2017-06-26 | 2017-09-01 | 联盛纸业（龙海）有限公司 | A kind of environmentally friendly deinking slag starches process for producing method with OCC |
| CN107119486A (en) * | 2017-06-26 | 2017-09-01 | 联盛纸业（龙海）有限公司 | A kind of environmentally friendly deinking slag production chipboard production method |
| CN107268314A (en) * | 2017-06-26 | 2017-10-20 | 联盛纸业（龙海）有限公司 | A kind of environmentally friendly deinking slag recycling production method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0442183A1 (en) * | 1988-10-03 | 1991-08-21 | Prime Fiber Corporation | Conversion of pulp and paper mill waste solids to papermaking pulp |
| CN1197768A (en) * | 1998-05-25 | 1998-11-04 | 徐功明 | Common waste water treating method |
| CN1609013A (en) * | 2004-11-03 | 2005-04-27 | 李胜功 | Production and application process of papermaking sewage treating agent |
| CN201198461Y (en) * | 2008-04-01 | 2009-02-25 | 宋佃凤 | Zero discharge apparatus for papermaking waste water |
| CN201358206Y (en) * | 2009-01-13 | 2009-12-09 | 上海康福特环境科技有限公司 | Integral equipment for sludge thickening and dehydrating |
| CN101704629A (en) * | 2009-09-18 | 2010-05-12 | 东莞玖龙纸业有限公司 | Method for dynamically controlling continuous feeding in dehydration of papermaking sludge |
-
2010
- 2010-10-21 CN CN2010105143766A patent/CN102002878B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0442183A1 (en) * | 1988-10-03 | 1991-08-21 | Prime Fiber Corporation | Conversion of pulp and paper mill waste solids to papermaking pulp |
| CN1197768A (en) * | 1998-05-25 | 1998-11-04 | 徐功明 | Common waste water treating method |
| CN1609013A (en) * | 2004-11-03 | 2005-04-27 | 李胜功 | Production and application process of papermaking sewage treating agent |
| CN201198461Y (en) * | 2008-04-01 | 2009-02-25 | 宋佃凤 | Zero discharge apparatus for papermaking waste water |
| CN201358206Y (en) * | 2009-01-13 | 2009-12-09 | 上海康福特环境科技有限公司 | Integral equipment for sludge thickening and dehydrating |
| CN101704629A (en) * | 2009-09-18 | 2010-05-12 | 东莞玖龙纸业有限公司 | Method for dynamically controlling continuous feeding in dehydration of papermaking sludge |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107119484A (en) * | 2017-06-26 | 2017-09-01 | 联盛纸业（龙海）有限公司 | A kind of environmentally friendly deinking slag starches process for producing method with OCC |
| CN107119486A (en) * | 2017-06-26 | 2017-09-01 | 联盛纸业（龙海）有限公司 | A kind of environmentally friendly deinking slag production chipboard production method |
| CN107268314A (en) * | 2017-06-26 | 2017-10-20 | 联盛纸业（龙海）有限公司 | A kind of environmentally friendly deinking slag recycling production method |
| CN107119486B (en) * | 2017-06-26 | 2018-04-06 | 联盛纸业（龙海）有限公司 | A kind of environmentally friendly deinking slag production chipboard production method |
Also Published As
| Publication number | Publication date |
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| CN102002878B (en) | 2012-07-04 |
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Denomination of invention: Method for recovering slurry from papermaking sewage Effective date of registration: 20190327 Granted publication date: 20120704 Pledgee: China Co truction Bank Corp Dongguan branch Pledgor: Guangdong Lee & Man Paper Factory Co., Ltd. Registration number: 2019440000122 |
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