CN103157644A - Pre-treatment process for milling and drying of papermaking waste residues - Google Patents
Pre-treatment process for milling and drying of papermaking waste residues Download PDFInfo
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- CN103157644A CN103157644A CN2011104130091A CN201110413009A CN103157644A CN 103157644 A CN103157644 A CN 103157644A CN 2011104130091 A CN2011104130091 A CN 2011104130091A CN 201110413009 A CN201110413009 A CN 201110413009A CN 103157644 A CN103157644 A CN 103157644A
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- paper mill
- waste sludge
- pressafiner
- chopping
- mummification
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Abstract
The invention relates to a pre-treatment process for milling and drying of papermaking waste residues. The pre-treatment process comprises the steps of milling, deironing and drying. The process comprises the following steps of (1) milling: the papermaking waste residues are lifted to a milling machine by using a grab bucket crane to mill the papermaking waste residues; (2) deironing: the milled papermaking waste residues are conveyed to a screw pressafiner by a belt conveyor and the iron is removed by using an electric magnetic iron remover on the belt; and (3) squeeze drying: the waste residues after deironing by the belt conveyor are conveyed to the screw pressafiner for drying. The pre-treatment process can remove 50% of water in the papermaking waste residues, increases dryness of the papermaking waste residues and increase a heat value of the papermaking waste residues while meeting requirements of conventional processes of the papermaking waste residues.
Description
Affiliated technical field
The invention belongs to paper industry " three wastes " treatment technology, particularly waste sludge from paper mill chopping mummification pretreating process.
Background technology
Pretreating process before existing waste sludge from paper mill burns comprises chopping, the deironing of waste sludge from paper mill, reduces the size of waste sludge from paper mill by chopping, reduces irony content in waste sludge from paper mill by magnetic separation.But the pre existing treatment process can not solve waste sludge from paper mill mass dryness fraction low (lower than 40%), calorific value low (lower than 8000kJ/kg), be unfavorable for the problem of burning, and makes the waste sludge from paper mill incinerator need admixture part auxiliary fuel to be used for steady combustion.
Summary of the invention
The technical problem to be solved in the present invention: the deficiency that can not improve the waste sludge from paper mill mass dryness fraction in order to overcome existing waste sludge from paper mill pretreatment system, the invention provides a kind of waste sludge from paper mill chopping mummification pretreating process, this cover technique can improve the mass dryness fraction of waste sludge from paper mill, improves the calorific value of waste sludge from paper mill.
The technical solution adopted for the present invention to solve the technical problems is: pending waste sludge from paper mill utilizes grab-crane to be promoted to shredding machine and shreds; Waste sludge from paper mill after chopping is delivered to pressafiner by belt conveyor and carries out mummification; Utilize electric magnetic iron remover to implement deironing on belt conveyor.Its technique step is poly-as follows successively:
(1) chopping: with grab-crane, waste sludge from paper mill is risen to shredding machine, shred; Shredding machine adopts swinging Double-shaft shearing shredding machine, by be arranged between the rotating knife on twin shaft and rotating knife and shredding machine base on dead knife between shearing, tear and squeezing action is shredded waste sludge from paper mill, the waste sludge from paper mill after chopping long limit size is less than 150mm; The cutter shaft of shredding machine adopts hydraulic-driven, configures 5～9 rotating knife on every axle.
(2) deironing: the waste sludge from paper mill after chopping is delivered to pressafiner by belt conveyor, adopt electric magnetic iron remover to carry out deironing on belt, described electric magnetic iron remover adopts self-discharging type electric-magnetic iron remover, magnetic field intensity 70～120mT, suspension height is less than 350mm, iron-attracting performance 0.1～50kg.
(3) squeezing mummification: carry out waste residue after the electromagnetism deironing by belt conveyor and be delivered to pressafiner and carry out mummification.Described pressafiner adopts heavy caliber, slow-speed of revolution pressafiner, helical axis diameter 500～1800mm, rotating speed 0.5～5rpm; Adopt the variable cross-section screw rod, the screw rod body diameter of porch is thin, toward the chap gradually of Way out diameter; By the reducing structure, waste sludge from paper mill is applied longitudinal pressing, thereby by the variation of screw rod blade pitgh, waste sludge from paper mill is applied the purpose that horizontal pressurization reaches mummification.Pressafiner filter screen mesh diameter 2～15mm.
The invention has the beneficial effects as follows, can be when satisfying existing waste sludge from paper mill pretreating process and requiring, remove in waste sludge from paper mill 50% moisture, improve the mass dryness fraction of waste sludge from paper mill, improve its calorific value.
Description of drawings
Fig. 1 is process chart of the present invention.In figure: 1. grab-crane, 2. shredding machine, 3. belt conveyor, 4. electric magnetic iron remover, 5. pressafiner.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing.
Implemented above-mentioned waste sludge from paper mill chopping mummification pretreating process in " Pinghu steam power plant's paper mill sludge and waste residue burning disposal project ".Pending waste sludge from paper mill utilizes grab-crane 1 to be promoted to shredding machine 2, and the waste sludge from paper mill after chopping is delivered to pressafiner 5 by belt conveyor 3 and carries out mummification, utilizes electric magnetic iron remover 4 to implement deironing on belt conveyor.
Its technique step is poly-as follows successively:
(1) chopping: with grab-crane, waste sludge from paper mill is risen to shredding machine, shred; Shredding machine adopts swinging Double-shaft shearing shredding machine, by be arranged between the rotating knife on twin shaft and rotating knife and shredding machine base on dead knife between shearing, tear and squeezing action is shredded waste sludge from paper mill, the waste sludge from paper mill after chopping long limit size is less than 150mm; The cutter shaft of shredding machine adopts hydraulic-driven, configures 5～9 rotating knife on every axle.
(2) deironing: the waste sludge from paper mill after chopping is delivered to by belt conveyor and adopts electric magnetic iron remover to carry out deironing on the belt of pressafiner, described electric magnetic iron remover adopts self-discharging type electric-magnetic iron remover, magnetic field intensity 70～120mT, suspension height is less than 350mm, iron-attracting performance 0.1～50kg.
(3) squeezing mummification: carry out waste residue after the electromagnetism deironing by belt conveyor and be delivered to pressafiner and carry out mummification.Described pressafiner 5 adopts heavy caliber, slow-speed of revolution pressafiner, helical axis diameter 500～1800mm, rotating speed 0.5～5rpm; Adopt the variable cross-section screw rod, the screw rod body diameter of porch is thin, toward the chap gradually of Way out diameter; By the reducing structure, waste sludge from paper mill is applied longitudinal pressing, thereby by the variation of screw rod blade pitgh, waste sludge from paper mill is applied the purpose that horizontal pressurization reaches mummification.Pressafiner filter screen mesh diameter 2～15mm.
Before the waste sludge from paper mill pretreatment, mass dryness fraction is 35%, day output 500t, and long limit size is 1000mm to the maximum;
Grab-crane 1 grab bucket volume 3m
3, bivalve grab bucket;
Swinging Double-shaft shearing shredding machine 2 25t/h that exerts oneself, 7 rotating knifes on every axle, blade axis rotary speed 30rpm, after chopping, long limit size is less than 150mm;
Belt conveyor 3 tops are adopted and are lifted plate, bandwidth 1200mm, conveying capacity 25t/h;
Electric magnetic iron remover 4 is self-discharging type electric-magnetic iron remover, and magnetic field intensity 120mT adapts to bandwidth 1200mm, iron-attracting performance 40kg;
Pressafiner 5 screw diameter 1350mm, long 7000mm, rotating speed 1rpm, mesh diameter 10mm, after mummification, the waste sludge from paper mill mass dryness fraction is greater than 60%.
Claims (3)
1. waste sludge from paper mill shreds the mummification pretreating process, it is characterized in that its technique step is poly-as follows successively:
(1) chopping: with grab-crane, waste sludge from paper mill is risen to shredding machine, shred; Shredding machine adopts swinging Double-shaft shearing shredding machine, by be arranged between the rotating knife on twin shaft and rotating knife and shredding machine base on dead knife between shearing, tear and squeezing action is shredded waste sludge from paper mill, the waste sludge from paper mill after chopping long limit size is less than 150mm;
(2) deironing: the waste sludge from paper mill after chopping is delivered to pressafiner by belt conveyor, adopts electric magnetic iron remover to carry out deironing on belt;
(3) squeezing mummification: carry out waste residue after the electromagnetism deironing by belt conveyor and be delivered to pressafiner and carry out mummification.
2. according to claim 1 waste sludge from paper mill chopping mummification pretreating process, it is characterized in that: in step (2), described electric magnetic iron remover adopts self-discharging type electric-magnetic iron remover, magnetic field intensity 70～120mT, suspension height is less than 350mm, iron-attracting performance 0.1～50kg.
3. according to claim 1 waste sludge from paper mill chopping mummification pretreating process, it is characterized in that: in described step (3), pressafiner adopts heavy caliber, slow-speed of revolution pressafiner, helical axis diameter 500～1800mm, rotating speed 0.5～5rpm; Pressafiner filter screen mesh diameter 2～15mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110413009.1A CN103157644B (en) | 2011-12-13 | 2011-12-13 | Pre-treatment process for milling and drying of papermaking waste residues |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110413009.1A CN103157644B (en) | 2011-12-13 | 2011-12-13 | Pre-treatment process for milling and drying of papermaking waste residues |
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| CN103157644A true CN103157644A (en) | 2013-06-19 |
| CN103157644B CN103157644B (en) | 2015-06-17 |
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| CN201110413009.1A Active CN103157644B (en) | 2011-12-13 | 2011-12-13 | Pre-treatment process for milling and drying of papermaking waste residues |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103418484A (en) * | 2013-08-12 | 2013-12-04 | 江苏融达新材料股份有限公司 | Closed-loop feedback iron-selecting system for vertical mill |
| CN106045270A (en) * | 2016-05-22 | 2016-10-26 | 中国轻工业长沙工程有限公司 | Mixing and drying process for sludge and waste residue of wastepaper pulping and papermaking mill |
| CN106583426A (en) * | 2017-01-12 | 2017-04-26 | 湖南万容科技股份有限公司 | Papermaking waste residue energy utilization method |
| CN108160351A (en) * | 2017-11-28 | 2018-06-15 | 玖龙纸业（东莞）有限公司 | A kind of light slag weight slag separator of rotary drum pulping machine |
| CN110142284A (en) * | 2019-05-31 | 2019-08-20 | 联盛纸业（龙海）有限公司 | A kind of waste residue removes iron dewatering process and its equipment |
| JP7084721B2 (en) | 2015-11-13 | 2022-06-15 | 日本製紙株式会社 | Dehydration method of chemically modified pulp dispersion |
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| CN1704646A (en) * | 2004-05-27 | 2005-12-07 | 清华大学 | Squeezing type dehydration system adapted for waste paper residue with high water content |
| CN101195974A (en) * | 2006-12-04 | 2008-06-11 | 陈维强 | Production processing method and device for regenerating waste material slag in wastepaper papermaking |
| CN102002882A (en) * | 2010-09-25 | 2011-04-06 | 山东天地缘纸业有限公司 | Method for producing corrugated paper by utilizing papermaking waste residues and sludge |
| CN102042599A (en) * | 2009-10-21 | 2011-05-04 | 永州湘江纸业有限责任公司 | Resource utilization method of biomass waste |
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| US4123489A (en) * | 1977-05-17 | 1978-10-31 | Flett Development Company | Method for converting waste paper products into useful forms |
| CN1704646A (en) * | 2004-05-27 | 2005-12-07 | 清华大学 | Squeezing type dehydration system adapted for waste paper residue with high water content |
| CN101195974A (en) * | 2006-12-04 | 2008-06-11 | 陈维强 | Production processing method and device for regenerating waste material slag in wastepaper papermaking |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103418484A (en) * | 2013-08-12 | 2013-12-04 | 江苏融达新材料股份有限公司 | Closed-loop feedback iron-selecting system for vertical mill |
| JP7084721B2 (en) | 2015-11-13 | 2022-06-15 | 日本製紙株式会社 | Dehydration method of chemically modified pulp dispersion |
| CN106045270A (en) * | 2016-05-22 | 2016-10-26 | 中国轻工业长沙工程有限公司 | Mixing and drying process for sludge and waste residue of wastepaper pulping and papermaking mill |
| CN106583426A (en) * | 2017-01-12 | 2017-04-26 | 湖南万容科技股份有限公司 | Papermaking waste residue energy utilization method |
| CN108160351A (en) * | 2017-11-28 | 2018-06-15 | 玖龙纸业（东莞）有限公司 | A kind of light slag weight slag separator of rotary drum pulping machine |
| CN110142284A (en) * | 2019-05-31 | 2019-08-20 | 联盛纸业（龙海）有限公司 | A kind of waste residue removes iron dewatering process and its equipment |
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| Publication number | Publication date |
|---|---|
| CN103157644B (en) | 2015-06-17 |
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