CN101830686B - Method for producing high-density hard molding packaging material from papermaking sludge - Google Patents
Method for producing high-density hard molding packaging material from papermaking sludge Download PDFInfo
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- CN101830686B CN101830686B CN 201010133543 CN201010133543A CN101830686B CN 101830686 B CN101830686 B CN 101830686B CN 201010133543 CN201010133543 CN 201010133543 CN 201010133543 A CN201010133543 A CN 201010133543A CN 101830686 B CN101830686 B CN 101830686B
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Abstract
The invention relates to a method for producing a high-density hard molding packaging material from papermaking sludge. By using primary papermaking sludge and slurry slag as the raw materials, the method comprises the following steps: (1) sequentially adding lime, aluminum sulfate, polyferric sulfate and polyacrylamide into the primary papermaking sludge, mixing, waiting until the lamination of sludge and water is stable, and separating the sludge from water in a sedimentation way; (2) adding a given amount of slurry slag into the sludge, and thoroughly mixing; (3) adding quaternary ammoniumsalt cationic polymers for refining; and (4) vacuum-molding the processed sludge slurry, and drying to obtain the molding product. In the invention, a wet-method refining modification technology is used for improving the physical and chemical properties of the prior solid waste, namely papermaking sludge, in the enterprise, and the papermaking sludge is directly made into pulp molding products, thereby changing wastes into valuables. The invention can achieve zero discharge of papermaking sludge in the enterprise, reduces the environmental pollution, and can replace the traditional method of producing the molding packaging material by using waste paper as the raw material, thereby recycling papermaking sludge and increasing the utilization ratio of resources.
Description
Technical field
The present invention relates to utilize paper mill sludge to produce the method for high-density hard molding packaging material.
Technical background
Paper-making industry is that current China is few in number, the product industry that supply falls short of demand and market potential is huge.2008, China's paper and production enterprise had 3500 approximately, 7,980 ten thousand tons of national paper and production amounts, and 7,935 ten thousand tons of consumption figures, output, aggregate consumption are only second to the U.S. and occupy the second place of the world.Sediment, particle and floating thing that paper mill sludge produces when referring to Processing Paper Wastewater such as Physical, chemical method, physical-chemical process and bioanalysises.Be the concentrated thing between liquid and solid, can carry with pump, but it is difficult to carry out Separation of Solid and Liquid by sedimentation.Paper industry produces a large amount of paper wastes from different workshop sections in the process of pulping and paper-making.The mud that produces behind Waste Water Treatment is divided into three kinds in preliminary sludge, secondary mud and three grades of mud.Preliminary sludge mainly comprises the tiny bits that produce in elementary sediment (fiber and filler) and the waste paper pulp-making process; Secondary mud often is called biological sludge, and it is by the mud of biological wastewater treatment postprecipitation, mainly is comprised of protein; Three grades of mud are the mud of three grades of wastewater treatment precipitations.In paper industry, in all papermaking solid-state castoffs, the mud that sewage disposal produces accounts for 38%, and a large amount of mud have brought serious pollution to environment.
The processing of mud is adopted traditionally and is burned and the method for landfill, and burning method is contaminated environment but also consume energy not only, and is superseded gradually.Landfill method is the most frequently used method, but landfill method needs at first with mud natural evaporation mummification, and then the outward transport landfill, and natural evaporation dewatered sludge not only floor space is large, pollutes surrounding enviroment, and is subject to weather effect, also need consider mud transportation problem, and cost is higher.Particularly in recent years, people recognize that landfill also may cause groundwater pollution, so that landfill method is not more and more adopted by environmentally friendly enterprise, the research and development recycling treatment utilizes technology and product to become key and the focus that solves the paper mill sludge outlet.The correlation technique report also constantly occurs, and is used for chemical fertilizer (CN200510030125.X, CN200810159425.1), section bar or building materials (CN200510104235.6, CN200810115909.6, CN200910099295.1), stuffing (CN03115013.6, CN200810119200.3) etc. such as paper mill sludge.
Summary of the invention
It is the method that raw material is produced high-density hard molding packaging material that the object of the invention provides a kind of paper mill sludge.The inventor finds that by research paper mill sludge particularly papermaking preliminary sludge main component is fiber fines and protein, and fiber content is high, is suitable for doing moulding material.(moisture can reach 70% but because the moisture of preliminary sludge is also higher, solid content is 30%), inorganic content high (inorganic matter accounts for 70%) in the solid content, therefore, directly adopt preliminary sludge in molded, material homogenieity and drainability are poor, and the degree of polymerization is low, and formed product is difficult, product strength is low.Therefore, the present invention namely is by elementary paper mill sludge being carried out the multistep preliminary treatment, cooperating and add a certain amount of screenings (mainly being thick long fiber), and further through the chemical conditioning modification, the material of acquisition can satisfy the performance requirement of molding processing and product.
(moisture is greater than 60% with the papermaking preliminary sludge in the present invention, content of organics is less than 60% in the solid content) and screenings be raw material, production process comprises: (1) in the paper mill sludge weight of solid content as 100%, first with the lime, 2%～5% aluminum sulfate, 0.1%～1% bodied ferric sulfate and 0.1%～1% polyacrylamide that add successively 3%～10% in the papermaking preliminary sludge, mix and blend 30～60 minutes, Deng the muddy water layering stable after, mud is deposited separation from water; (2) add a certain amount of screenings and fully mixing in the mud after the separation, the mud of separation and the weight ratio of screenings were less than 2: 1; (3) add again the quaternary ammonium salt cationic polymer and carry out modifier treatment, the consumption 1%～10% of quaternary ammonium salt cationic polymer; (4) the mud sizing material forming concentration after the processing is controlled at 2%～4%, obtains layered product through vacuum forming, drying.
Among the present invention, the consumption of lime can increase and decrease according to content of organics in the mud, when the content of organics in the mud solid content greater than 60% the time, can be without lime.
The quaternary ammonium salt cationic polymer is selected from dimethyl diallyl ammonium chloride (DMDAAC) or methylacryoyloxyethyl alkyl dimethyl ammonium chloride (DMAEMA) a kind of or its mixture wherein.Consider performance and cost factor, DMDAAC is 1: 4～1: 1 with the ratio of DMAEMA addition, preferred 1: 2." bridging " factor unique in the quaternary ammonium salt cationic polymer can make the mud fiber form stable space network, and with fiber fines, the rapid combination of particle, improve fines retention, increase interfibrous bond strength, improve the mud drainability.
Screenings can adopt this long fiber waste residue that sifts out of waste paper pulp-making in screening process, main component is thick long fiber.
Among the present invention, molding adopt vacuum adsorption molding, forming vacuum degree be-0.2～-0.4MPa.Goods after the moulding are further dry, 80～240 ℃ of baking temperatures, 20～50 minutes drying times.
The present invention is the existing solid waste of enterprise---and paper mill sludge is by the modified modification technology of a kind of wet method, its physicochemical property is improved, direct converting pulp moulding article, turn waste into wealth, both realized the recycling of paper mill sludge, reach the zero-emission of enterprise's paper mill sludge, alleviate environmental pollution, alternative traditional molding packaging material of producing take waste paper as raw material has again improved the utilization rate of resource, has good exemplary role aspect waste ' s reclamation.
The specific embodiment
Choose paper mill sludge, analyze after testing its characteristic and be: its moisture is 70%, and solid content is 30%, and wherein inorganic matter accounts for 70% in the solid content, and main component is filler and other impurity; Organic matter accounts for 30%, and main component is the compositions such as fiber fines and protein.Screenings is the screenings that produces in the waste paper pulp-making process.
Take the solid content weight of mud as 100%, lime is added to 150M
3Reaction tank, lime is 6% to sludge quantity, mixes after 10 minutes; Add again 3% aluminum sulfate, mixed 15 minutes; Add again 0.5% bodied ferric sulfate, 0.4% polyacrylamide, mixed 15 minutes, after the muddy water layering is stable with moisture from going out.
Coarse slurry pump after will screening again enters mixing pit, mud: the addition of thick slurry is further mixing in 1: 1; Add respectively 2% DMDAAC and 4% DMAEMA and carry out modifier treatment; Keep 3% moulding concentration, the slurry mixture is carried out vacuum forming, the forming vacuum degree is-0.3Mpa; Further divide three sections dryings: one section temperature is 100 ℃, 15 minutes drying times; Two sections temperature are at 240 ℃, and 5 minutes drying times, three sections 80 ℃, 10 minutes drying times, the final outlet temperature is controlled at 80 ℃, obtains final product.Product quality meets BB/T0015-1999 " paper mould egg pallet " industry standard requirement.
Claims (5)
1. utilize paper mill sludge to produce the method for high-density hard molding packaging material, it is characterized in that with moisture greater than 60%, organic matter is raw material less than 60% papermaking preliminary sludge and screenings in the solid content, production process comprises: 1) in the paper mill sludge weight of solid content as 100%, first with the lime, 2%～5% aluminum sulfate, 0.1%～1% bodied ferric sulfate and 0.1%～1% polyacrylamide that add successively 3%～10% in the papermaking preliminary sludge, mix and blend 30～60 minutes, Deng the muddy water layering stable after, mud is deposited separation from water; 2) add a certain amount of screenings and fully mixing in the mud after the separation, the mud of separation and the weight ratio of screenings were less than 2: 1; 3) add dimethyl diallyl ammonium chloride and the methylacryoyloxyethyl alkyl dimethyl ammonium chloride carries out modifier treatment, its consumption is 1%～10% again, and both addition ratios are 1: 4～1: 1; 4) the mud sizing material forming concentration after the processing is controlled at 2%～4%, obtains layered product through vacuum forming, drying.
2. production method according to claim 1 is characterized in that the addition ratio of dimethyl diallyl ammonium chloride and methylacryoyloxyethyl alkyl dimethyl ammonium chloride is 1: 2.
3. production method according to claim 1 is characterized in that screenings is this long fiber waste residue that sifts out of waste paper pulp-making in screening process, and main component is thick long fiber.
4. production method according to claim 1, the forming vacuum degree that it is characterized in that molding be-0.2～-0.4MPa.
5. production method according to claim 1 is characterized in that after the moulding 80～240 ℃ of baking temperatures, 20～50 minutes drying times.
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| CN 201010133543 CN101830686B (en) | 2010-03-24 | 2010-03-24 | Method for producing high-density hard molding packaging material from papermaking sludge |
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| CN 201010133543 CN101830686B (en) | 2010-03-24 | 2010-03-24 | Method for producing high-density hard molding packaging material from papermaking sludge |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101967767B (en) * | 2010-09-21 | 2013-02-13 | 姜六平 | Vacuum extrusion low-temperature drying process and equipment for pulp molding |
| CN103665524A (en) * | 2013-12-11 | 2014-03-26 | 南京聚锋新材料有限公司 | Paper sludge-polyolefin type composite sectional bar and preparation method thereof |
| CN106012656A (en) * | 2016-05-20 | 2016-10-12 | 苏州倍力特物流设备有限公司 | Environment-friendly high-barrier pulp molding composite material and preparation method thereof |
| CN107841906A (en) * | 2017-11-02 | 2018-03-27 | 江南大学 | A kind of sludge base moulded paper pulp product and preparation method thereof |
| CN112709092B (en) * | 2019-10-24 | 2022-06-17 | 夏振明 | Paper made from waste residues of textile, industry and agriculture and paper making method |
| CN114044640B (en) * | 2021-10-28 | 2022-12-20 | 嘉兴绿方舟环保技术有限公司 | Double-component sludge-based non-fired cementing material and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1275042A (en) * | 1968-01-25 | 1972-05-24 | Nat Res Dev | The utilisation of paper sludge for sheeting or moulding |
| CN101327976A (en) * | 2008-07-15 | 2008-12-24 | 南通立源水处理技术有限公司 | Efficient water treatment flocculant |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1275042A (en) * | 1968-01-25 | 1972-05-24 | Nat Res Dev | The utilisation of paper sludge for sheeting or moulding |
| CN101327976A (en) * | 2008-07-15 | 2008-12-24 | 南通立源水处理技术有限公司 | Efficient water treatment flocculant |
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Effective date of registration: 20160506 Address after: 743400 No. 8 Hengda Road, Jingning Industrial Park, Gansu Patentee after: JINGNING HENGDA CO.,LTD. Address before: 743400, No. 2, Hengda Middle Road, eight mile Industrial Zone, Jingning County, Gansu, Pingliang Patentee before: Du Jin |
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Effective date of registration: 20230517 Address after: Wei Rong Zhen Wei Rong Cun, Jingning County, Pingliang City, Gansu Province, 743403 Patentee after: Gansu Hengda Environmental Protection Technology Co.,Ltd. Patentee after: Gansu Hengda Intelligent Packaging Co.,Ltd. Address before: No. 8 Hengda Road, Jingning Industrial Park, Gansu Province, 743400 Patentee before: JINGNING HENGDA CO.,LTD. |