CN117966501A - Novel method for preparing paper from straw - Google Patents
Novel method for preparing paper from straw Download PDFInfo
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- CN117966501A CN117966501A CN202410220436.5A CN202410220436A CN117966501A CN 117966501 A CN117966501 A CN 117966501A CN 202410220436 A CN202410220436 A CN 202410220436A CN 117966501 A CN117966501 A CN 117966501A
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- 238000000034 method Methods 0.000 title claims abstract description 63
- 239000010902 straw Substances 0.000 title claims abstract description 48
- 238000011282 treatment Methods 0.000 claims abstract description 35
- 239000000835 fiber Substances 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 34
- 239000010866 blackwater Substances 0.000 claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims abstract description 27
- 238000004537 pulping Methods 0.000 claims abstract description 26
- 238000005096 rolling process Methods 0.000 claims abstract description 24
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims abstract description 16
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims abstract description 16
- 235000005822 corn Nutrition 0.000 claims abstract description 16
- 238000000227 grinding Methods 0.000 claims abstract description 16
- 238000001125 extrusion Methods 0.000 claims abstract description 15
- 239000010802 sludge Substances 0.000 claims abstract description 12
- 230000006378 damage Effects 0.000 claims abstract description 11
- 239000003381 stabilizer Substances 0.000 claims abstract description 9
- 238000000926 separation method Methods 0.000 claims abstract description 8
- 238000001556 precipitation Methods 0.000 claims abstract description 7
- 239000010865 sewage Substances 0.000 claims abstract description 7
- 239000007844 bleaching agent Substances 0.000 claims abstract description 3
- 239000002893 slag Substances 0.000 claims description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 34
- 238000001035 drying Methods 0.000 claims description 31
- 230000001105 regulatory effect Effects 0.000 claims description 20
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 240000008042 Zea mays Species 0.000 claims description 14
- 238000005507 spraying Methods 0.000 claims description 12
- 238000005345 coagulation Methods 0.000 claims description 10
- 230000015271 coagulation Effects 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- 239000000428 dust Substances 0.000 claims description 9
- 239000000446 fuel Substances 0.000 claims description 9
- 239000003245 coal Substances 0.000 claims description 8
- 238000004062 sedimentation Methods 0.000 claims description 8
- 238000002485 combustion reaction Methods 0.000 claims description 7
- 230000001276 controlling effect Effects 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 238000004061 bleaching Methods 0.000 claims description 6
- 230000018044 dehydration Effects 0.000 claims description 6
- 238000006297 dehydration reaction Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000004115 Sodium Silicate Substances 0.000 claims description 5
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 5
- 239000000701 coagulant Substances 0.000 claims description 5
- 238000010494 dissociation reaction Methods 0.000 claims description 5
- 230000005593 dissociations Effects 0.000 claims description 5
- 238000009897 hydrogen peroxide bleaching Methods 0.000 claims description 5
- 229920002401 polyacrylamide Polymers 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 5
- 150000003839 salts Chemical class 0.000 claims description 5
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 5
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 239000008394 flocculating agent Substances 0.000 claims description 4
- 238000004898 kneading Methods 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 241001105098 Angelica keiskei Species 0.000 claims description 2
- 241001091560 Crossosoma Species 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
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- 230000003472 neutralizing effect Effects 0.000 claims description 2
- 238000007873 sieving Methods 0.000 claims description 2
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- 230000000704 physical effect Effects 0.000 abstract description 4
- 241000209149 Zea Species 0.000 abstract 2
- 238000007639 printing Methods 0.000 description 13
- 239000002699 waste material Substances 0.000 description 9
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- 238000010025 steaming Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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Abstract
The invention discloses a novel straw paper making method, which relates to the technical field of paper making and comprises the following steps of S1, primarily treating corn straw to soften the corn straw, putting the softened straw into a double-screw thread rolling machine to extrude and divide threads, putting the divided straw into a reaction bin at 90 ℃ to bleach the threads, adding a stabilizing agent in the treatment process, S2, pouring the treated straw into the double-screw thread rolling machine again to extrude and divide threads, pouring extruded materials into a pulping machine to grind to obtain coarse pulp, and adopting an activated sludge method to increase the removal rate of suspended matters by adding medicine precipitation to black water generated in the grinding process, thereby reducing the harm of sewage. According to the invention, through extrusion and filament separation of the straw, the primary fiber wall (p layer) and the secondary fiber wall (S1 layer) of the fiber filaments in the straw generate excellent damage effects, the pulping is promoted, the physical properties of the paper are improved, and the strength of the paper is higher.
Description
Technical Field
The invention relates to the technical field of papermaking, in particular to a novel method for preparing paper from straw.
Background
The raw material adopted in papermaking is tree pulp, and the straw papermaking technology is a more environment-friendly technology, and is a technology worth popularizing by crushing and steaming straw to obtain straw pulp.
However, the above-mentioned patent has a certain disadvantage that the waste water cannot be fully utilized in the papermaking process, and can only be used as an organic waste material for treatment; moreover, slag generated when the refined pulp is obtained can not be effectively utilized, so that the papermaking cost can not be reduced; the strength of the obtained paper is poor, the internal stress of straw limit cannot be relieved, and the tensile properties of the paper are low; meanwhile, the pH value of the paper cannot be regulated, the ink mark drying speed of the finished paper is low when the finished paper is printed, and the color of the printed matter is poor.
Disclosure of Invention
The invention provides a novel method for preparing paper by using straw, which aims to solve the problems in the background technology.
In order to solve the technical problems, the invention adopts the following technical scheme:
A novel paper making method by straw comprises the following steps: s1, primarily treating corn straws to soften the corn straws, putting the softened straws into a double-screw thread rolling machine to extrude and divide threads, putting the divided straws into a reaction bin at 90 ℃ to bleach, and adding a stabilizer in the treatment process;
S2, pouring the treated straws into a double-screw thread rolling machine again for extrusion thread separation, pouring the extruded materials into a pulping machine for grinding to obtain coarse pulp, and adopting an activated sludge method to produce black water in the grinding process and adopting chemical adding precipitation to improve the removal rate of suspended matters and reduce the harm of sewage;
S3, pouring the obtained coarse pulp into a defibering device for 5-10 minutes, performing secondary pulping on the coarse pulp after the defibering by adopting a pulping machine to obtain fine pulp, pouring the fine pulp into a slag remover for removing slag materials with different densities from the pulp by utilizing a centrifugal principle to obtain clean pulp, collecting the removed slag materials in a concentrated manner, and converting the removed slag materials into alternative fuel SRF for secondary use through treatments of dehydration, crushing, scattering and dust removal;
S4, removing water in the clean pulp to obtain concentrated pulp, pouring the concentrated pulp into a pulp mixing tank, regulating the pH value of the concentrated pulp by using a neutralizing agent to obtain regulating pulp, then sending the regulating pulp into a pulp flowing box, spraying the regulating pulp onto a forming screen by adopting a pulp spraying mode to obtain wet paper, and extruding and drying the wet paper to obtain the paper.
The technical scheme of the invention is further improved as follows: the step S1 comprises the following steps: s11, putting the corn stalks into hot water at 90 ℃ to be soaked for 20-25 minutes, and softening the corn stalks;
S12, pouring softened straws into a double-screw thread rolling machine to extrude and divide threads, pouring caustic soda into the double-screw thread rolling machine, wherein the mass of the caustic soda is 4% -8% of that of the straws, and the double-screw extrusion impregnating machine utilizes two parallel, meshed and co-rotating building block combined screws and screw elements with special structures to dynamically extrude fiber slurry while conveying and complete fiber crushing and dissociation by kneading among fibers under high concentration and high pressure;
And S13, pouring the material extruded by the double-screw thread rolling machine into a reaction bin with the temperature of 90 ℃ for hydrogen peroxide bleaching reaction treatment for 90-100 minutes, and adding stabilizer sodium silicate in the bleaching process.
The technical scheme of the invention is further improved as follows: the step S2 comprises the following steps: s21, putting the materials after the reaction is finished into a double-screw thread rolling machine again for extrusion and thread separation, and pouring the extruded materials into a pulping machine for grinding to obtain coarse pulp;
S22, the black water generated in the grinding process firstly adopts a grid to pass through coarse substances and then enters a primary sedimentation tank for sedimentation, then the black water is discharged into a biochemical tank in a pumping mode, a coagulant mixed by aluminum salt and ferric salt is added into the biochemical tank, the biochemical tank is in a coagulation reaction state, and the black water forms fine rock flowers during the coagulation reaction;
s23, adding polyacrylamide into the mixture after the Angelica keiskei flowers are produced to prepare flocculating agents to enable the consolidated flowers to become consolidated flower flocs, pushing out suspended matters under the pushing action of water flow when the water surface floats, drying, mixing the obtained sludge with coal for combustion, and carrying out biochemical treatment on clear water at the bottom for secondary utilization.
The technical scheme of the invention is further improved as follows: the step S3 comprises the following steps: s31, pouring the coarse pulp into a defibrator at 60-70 ℃ to be submerged for 5-10 minutes, and fully stirring the coarse pulp;
S32, performing secondary pulping on the coarse pulp after the de-submerging is finished by adopting a pulping machine to obtain refined pulp, pouring the refined pulp into a slag remover, removing slag materials with different densities from the pulp by utilizing a centrifugal principle to obtain clean pulp, and collecting the slag materials in a concentrated manner;
And S33, drying and dehydrating the collected slag, enabling the water content in the slag to be lower than 5%, crushing the slag by a crusher, scattering the bonded slag by a scattering machine, removing dust in the scattering process, sieving the scattered slag after the scattering is finished, removing iron materials contained in the slag, and finally obtaining the slag which can be used as an alternative fuel SRF for cogeneration.
The technical scheme of the invention is further improved as follows: the step S4 includes the steps of: s41, removing water in the clean pulp by adopting a centrifugal dehydrator to obtain concentrated pulp, pouring the concentrated pulp into a pulp mixing tank, and adjusting the pH value of the concentrated pulp by adopting an acid-base neutralizer to control the pH value to be 6-7PH, thereby obtaining adjusted pulp;
s42, pouring the regulating pulp into a pulp box, spraying the regulating pulp into a forming net in a pulp spraying mode to obtain wet paper, wherein the moisture content of the wet paper is 20% -25%, conveying the obtained wet paper into a press roller for extrusion, controlling the thickness of the wet paper to be 0.104mm, and controlling the moisture content of the wet paper to be 5% -7% in a drying mode.
By adopting the technical scheme, compared with the prior art, the invention has the following technical progress:
1. the invention provides a novel straw paper making method, which is characterized in that straw is extruded and divided, so that the primary wall (p layer) and the secondary wall (S1 layer) of fiber in the straw generate excellent damage effect, pulp forming is promoted, the physical property of paper is improved, the strength of the paper is higher, the ground pulp is quickly cooled, the bending and twisting state of the fiber is fixed, the fiber of the ground pulp loses elasticity, the strength characteristic of the obtained pulp is lower than the strength characteristic of the fiber in a thermal state, the phenomenon is called the state, the twisting region and the curling region of the fiber are relaxed and straightened after the de-diving treatment, and the stress relaxation process of the fiber is realized under the condition of controlling the temperature, so that the tensile index of the paper is increased.
2. The invention provides a novel straw paper making method, which improves the removal rate of suspended matters by adopting an activated sludge method and adding medicine for precipitation, reduces the harm of sewage, treats and recycles black water generated in the pulping process, mixes the suspended matters generated in the treatment with coal for combustion after drying treatment, and can reutilize clear water after suspended matters are removed through a biochemical water treatment process, thereby avoiding the black water in the pulping process from polluting soil.
3. The invention provides a novel method for preparing paper by using straw, which is characterized in that slag in paper pulp is collected, and a series of treatments such as dehydration, crushing, scattering and dust removal are carried out on the slag, so that waste materials can be converted into alternative fuel SRF for cogeneration and utilization, and the waste materials generated in the paper production process can be fully utilized.
4. The invention provides a novel method for preparing paper by using straw, which is characterized in that the pH value of paper pulp is adjusted, the acid paper can inhibit the drying of printing ink marks, the higher the acidity is, the slower the drying speed of the ink marks is, the acid-base of the paper has a decisive influence on the printing process and the drying film of the printing ink marks, when the pH value of the paper is reduced from 5.5 to 4.4, the drying speed of the ink marks is reduced by three times, the paper is acidic, and the color and luster of a printed product are also influenced, so that the paper prepared from the paper pulp can have a better printing effect by adjusting the pH value.
Drawings
FIG. 1 is a schematic flow chart of the present invention;
FIG. 2 is a flow chart of the steps of the present invention.
Detailed Description
The invention is further illustrated by the following examples:
example 1
As shown in fig. 1-2, the invention provides a novel method for making paper by straw, which comprises the following steps: s1, primarily treating corn straws, softening the corn straws, putting the softened straws into a double-screw thread rolling machine for extrusion and thread separation, putting the cut straws into a 90 ℃ reaction bin for bleaching treatment, adding a stabilizing agent in the treatment process, S2, pouring the treated straws into the double-screw thread rolling machine again for extrusion and thread separation, pouring the extruded materials into a pulp grinder for grinding to obtain coarse pulp, adopting an activated sludge method to produce black water in the grinding process, improving the removal rate of suspended matters through adding medicine precipitation, reducing the harm of sewage, S3, pouring the obtained coarse pulp into a fiber fluffer for digestion for 5-10 minutes, adopting a pulp grinder for secondary pulp grinding to obtain fine pulp, pouring the fine pulp into a slag pulp with density different from pulp in a slag remover for removing to obtain dry pulp, concentrating the fine pulp through dehydration, crushing, scattering and dust removal treatment, converting the extruded materials into alternative fuel SRF, adopting a secondary pulp utilization method, pouring S4 into a pulp adjusting tank for drying, adopting a pulp spray, concentrating pulp, and drying to obtain pulp, and concentrating pulp by adopting a wet pulp adjusting method.
In this embodiment, the corn stalk is used as the raw material of the paper, and the paper with high wear resistance, high tensile strength and better printing effect is prepared by softening, extruding, pulping, de-immersing, filtering, blending, spraying, extruding and drying, and black water and pulp waste generated in the manufacturing process can be properly treated, and the treated black water and residues can be used for secondary use in different industries.
Example 2
As shown in fig. 1-2, on the basis of embodiment 1, the present invention provides a technical solution: preferably, S11 is to put corn stalk into hot water of 90 ℃ for 20-25 minutes, the stalk softened by S12 is poured into a double screw thread rolling machine to be extruded and split, caustic soda with the mass of 4-8% of the stalk mass is poured into the double screw thread rolling machine, the double screw extrusion impregnating machine utilizes two parallel, meshed and co-rotating building block combined screws and screw elements with special structures to dynamically extrude fiber slurry while conveying, fiber crushing and dissociation are completed by kneading among fibers under high concentration and high pressure, the material extruded by the S13 double screw thread rolling machine is poured into a reaction bin with the temperature of 90 ℃ to be subjected to hydrogen peroxide bleaching reaction for 90-100 minutes, and stabilizer sodium silicate is added in the bleaching process.
In the embodiment, corn stalks are soaked in hot water at 90 ℃ for 20-25 minutes to be softened, the stalks are extruded and cut by a double-screw thread rolling machine after being softened, the double-screw extrusion soaking machine utilizes two parallel, meshed and co-rotating building block combined screws and screw elements with special structures, fiber pulp is dynamically extruded while being conveyed, fiber crushing and dissociation are completed by kneading among fibers under high concentration and high pressure, excellent damage effects are generated on primary walls (p layers) and secondary walls (S1 layers) of the fibers in the stalks, pulp formation is promoted, physical properties of paper are improved, strength of the paper is higher, extruded materials are poured into a reaction bin with the temperature of 90 ℃ to be subjected to hydrogen peroxide bleaching reaction for 90-100 minutes, and stabilizer sodium silicate is added in the bleaching process.
Example 3
As shown in fig. 1-2, on the basis of embodiment 1, the present invention provides a technical solution: preferably, S21 is to put the material after the reaction into a double screw thread rolling machine again to extrude and divide threads, the extruded material is poured into a pulping machine to be grinded to obtain coarse pulp, black water generated in the grinding process of S22 is firstly deposited by adopting a grid to pass through coarse matters and then enters a primary sedimentation tank, then the black water is discharged into a biochemical tank by using a pumping mode, a coagulant mixed by aluminum salt and ferric salt is added into the biochemical tank to enable the biochemical tank to enter a coagulation reaction state, fine flowers are formed in the black water during the coagulation reaction, polyacrylamide is added after the flowers are generated into the black water to prepare flocculating agent to enable the flowers to become consolidated flower flocks, the suspended matter is pushed out under the propelling action of water surface buoyancy, the obtained sludge is mixed with coal for combustion, and clear water at the bottom is used for secondary utilization after the biochemical treatment.
In the embodiment, the bleached materials are put into a double-screw thread rolling machine again to be extruded and thread separated, the extruded materials are poured into a pulp grinder to be ground to obtain coarse pulp, waste black water generated in the grinding process of the coarse pulp is fed into a primary sedimentation tank to be precipitated after adopting a grid too coarse matters, then black water is discharged into a biochemical tank in a pumping mode, a coagulant mixed by aluminum salt and ferric salt is added into the biochemical tank to enable the biochemical tank to enter a coagulation reaction state, fine flowers are formed in the black water during coagulation reaction, polyacrylamide is added after the flowers are generated to prepare flocculating agent to enable the flowers to become consolidated flower flocks, the suspended solids are pushed out under the propelling action of water flow to be dried, the obtained sludge is mixed with coal to be used for combustion, clear water at the bottom is used for secondary utilization after biochemical treatment, an activated sludge method is mainly adopted for wastewater treatment, the harm of the sewage is reduced by adding medicine precipitation, the black water generated in the pulp process is treated and reused, the suspended solids generated in the pulp treatment process can be dried to be mixed with the coal to be used for secondary utilization after the drying treatment, and the suspended solids can be burned to be used for secondary water treatment after the secondary pollution of the suspended solids is avoided by the secondary water treatment process.
Example 4
As shown in fig. 1-2, on the basis of embodiment 1, the present invention provides a technical solution: preferably, S31 is poured into a defibrator at 60-70 ℃ to be degerming for 5-10 minutes, the coarse pulp is fully stirred, the coarse pulp after the degerming of S32 is subjected to secondary pulping by a pulping machine to obtain refined pulp, the refined pulp is poured into a slag remover to remove slag with different density from the pulp by utilizing a centrifugal principle to obtain clean pulp, the slag is collected intensively, the slag collected in S33 is dried and dehydrated to ensure that the water content in the slag is lower than 5%, then the slag is crushed by a crusher, the bonded slag is scattered by a scattering machine, dust is removed in the scattering process, the slag is screened after the scattering is finished, iron materials contained in the slag are removed, and finally the obtained slag can be used as an alternative fuel SRF for co-production thermoelectric utilization.
In the embodiment, the coarse pulp is subjected to the de-submerging treatment, the coarse pulp is poured into a fiber fluffer at 60-70 ℃ for 5-10 minutes, and is fully stirred, after the de-submerging treatment, the kink area and the curl area of the fiber are relaxed and straightened, the stress relaxation process of the fiber is performed under the condition of controlling the temperature, the tensile index of paper is increased, the coarse pulp after the de-submerging treatment is subjected to secondary pulping by a pulping machine to obtain refined pulp, the refined pulp is poured into a slag remover, the slag with the density different from that of the pulp is removed by utilizing the centrifugal principle to obtain clean pulp, the slag is collected in a concentrated manner, and a series of treatments such as dehydration, crushing, scattering and dust removal are performed on the slag, so that waste materials can be converted into alternative fuels SRF for the cogeneration, and the waste materials generated in the paper production process can be fully utilized.
Example 5
As shown in fig. 1-2, on the basis of embodiment 1, the present invention provides a technical solution: preferably, S41 is to remove water in the clean pulp by adopting a centrifugal dehydrator to obtain concentrated pulp, the concentrated pulp is poured into a pulp mixing tank, the pH value of the concentrated pulp is regulated by adopting an acid-base neutralizer, the pH value is controlled to be 6-7PH, the regulated pulp is obtained, S42 is poured into a pulp box, the regulated pulp is sprayed onto a forming wire by adopting a pulp spraying mode to obtain wet paper, the moisture content of the wet paper is 20-25%, the obtained wet paper is sent into a press roller to be extruded, the thickness of the wet paper is controlled to be 0.104mm, and the moisture content of the wet paper is controlled to be 5-7% by adopting a drying mode.
In this embodiment, water in the dry pulp is removed by a centrifugal dehydrator to obtain concentrated pulp, the concentrated pulp is poured into a pulp mixing tank, the pH value of the concentrated pulp is regulated by an acid-base neutralizer, so that the pH value is controlled to be 6-7PH, the acidic paper can inhibit the drying of printing ink marks, the stronger the acidity is, the slower the drying speed of the ink marks is, the pH value of the paper has a decisive influence on the printing process and the drying conjunctiva of the printing ink marks, when the PH value of the paper is reduced to 4.4 from 5.5, the drying speed of the ink marks is reduced by three times, the paper is acidic, and the color of the printed matter is also influenced, therefore, the paper made of the pulp can have better printing effect by regulating the pH value, the pulp is obtained after the pulp is regulated, the wet paper is sprayed onto a forming net by adopting a pulp spraying mode, the moisture content of the wet paper is 20% -25%, the obtained wet paper is sent into a pressing roller to be extruded, the thickness of the wet paper is controlled to be 0.104mm, and the moisture of the wet paper is controlled to be 5% -7% to obtain a finished paper with higher strength by a drying mode.
To sum up, as shown in fig. 1-2, corn stalks are soaked in hot water at 90 ℃ for 20-25 minutes to soften, the stalks are extruded and separated into filaments by a double-screw thread rolling machine after softening, the double-screw extrusion soaking machine utilizes two parallel, meshed and co-rotating building block combined screws and screw elements with special structures to dynamically extrude fiber pulp while conveying, fiber crushing and dissociation are completed by rubbing among fibers under high concentration and high pressure, excellent destruction effects are generated on fiber primary walls (p layers) and secondary walls (S1 layers) of the fiber filaments in the stalks, pulp formation is promoted, physical properties of paper are improved, strength of paper is higher, extruded materials are poured into a reaction bin at 90 ℃ to carry out hydrogen peroxide bleaching reaction treatment for 90-100 minutes, stabilizer sodium silicate is added in the bleaching process, placing bleached materials into a double-screw thread rolling machine again for extrusion thread separation, pouring the extruded materials into a pulp grinder for grinding to obtain coarse pulp, allowing waste black water generated in the grinding process of the coarse pulp to enter a primary sedimentation tank for sedimentation after adopting a grid to pass through coarse substances, then discharging the black water into a biochemical tank in a pumping mode, adding a coagulant mixed by aluminum salt and ferric salt into the biochemical tank, allowing the biochemical tank to enter a coagulation reaction state, allowing the black water to form fine angeles during coagulation reaction, adding polyacrylamide after the angeles are generated to prepare flocculant to enable the consolidated flowers to become consolidated flower clusters, pushing out suspended matters under the propelling action of water flow under the floating of the water surface, drying, mixing the obtained sludge with coal for combustion, and using clear water at the bottom for secondary utilization after biochemical treatment, the method mainly adopts an activated sludge method and improves the removal rate of suspended matters through dosing precipitation, reduces the harm of sewage, treats and recycles black water generated in the pulping process, can be mixed with coal for combustion after drying treatment of suspended matters generated in the treatment, can secondarily utilize clear water after suspended matters are removed through a biochemical water treatment process, thereby avoiding the pollution of black water to soil in the pulping process, and then, the crude slurry is subjected to the de-submergence for 5-10 minutes by being poured into a fiber fluffer at 60-70 ℃, and is fully stirred, the kinking area and the curling area of fibers are relaxed and straightened after the de-submergence treatment, and under the condition of controlling the temperature in the de-submergence, the stress relaxation process of the fibers is carried out, the tensile index of paper is increased, the coarse pulp after the digestion is finished is subjected to secondary pulping by a pulping machine to obtain refined pulp, the refined pulp is poured into a slag remover, slag with the density different from that of the pulp is removed by utilizing a centrifugal principle to obtain clean pulp, the slag is collected in a concentrated way, the slag is subjected to a series of treatments such as dehydration, crushing, scattering, dust removal and the like, waste materials can be converted into alternative fuel SRF for cogeneration utilization, the waste materials generated in the paper production process can be fully utilized, the obtained clean pulp is subjected to water removal by a centrifugal dehydrator to obtain concentrated pulp, the concentrated pulp is poured into a pulp adjusting tank, the pH value of the concentrated pulp is regulated by an acid-base neutralizer, so that the pH value is controlled to be 6-7PH, the acid paper can inhibit the drying of printing ink, the stronger the acid is, the drying speed of the ink is slower, the acid-base of the paper has a decisive influence on the printing process and the drying film of the printing ink, when the PH value of paper is reduced from 5.5 to 4.4, the drying speed of ink marks is reduced by three times, the paper is acidic and the color of printed matters is also influenced, so that the paper made of paper pulp can have better printing effect by adjusting the PH value, the pulp is adjusted after being blended, the pulp is sprayed onto a forming net in a pulp spraying mode to obtain wet paper, the moisture content of the wet paper is 20% -25%, the obtained wet paper is sent into a press roller to be extruded, the thickness of the wet paper is controlled to be 0.104mm, and the moisture of the wet paper is controlled to be 5% -7% in a drying mode to obtain finished paper with higher strength.
The foregoing invention has been generally described in great detail, but it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, it is intended to cover modifications or improvements within the spirit of the inventive concepts.
Claims (5)
1. A novel paper making method by straw is characterized in that: the manufacturing method comprises the following steps: s1, primarily treating corn straws to soften the corn straws, putting the softened straws into a double-screw thread rolling machine to extrude and divide threads, putting the divided straws into a reaction bin at 90 ℃ to bleach, and adding a stabilizer in the treatment process;
S2, pouring the treated straws into a double-screw thread rolling machine again for extrusion thread separation, pouring the extruded materials into a pulping machine for grinding to obtain coarse pulp, and adopting an activated sludge method to produce black water in the grinding process and adopting chemical adding precipitation to improve the removal rate of suspended matters and reduce the harm of sewage;
S3, pouring the obtained coarse pulp into a defibering device for 5-10 minutes, performing secondary pulping on the coarse pulp after the defibering by adopting a pulping machine to obtain fine pulp, pouring the fine pulp into a slag remover for removing slag materials with different densities from the pulp by utilizing a centrifugal principle to obtain clean pulp, collecting the removed slag materials in a concentrated manner, and converting the removed slag materials into alternative fuel SRF for secondary use through treatments of dehydration, crushing, scattering and dust removal;
S4, removing water in the clean pulp to obtain concentrated pulp, pouring the concentrated pulp into a pulp mixing tank, regulating the pH value of the concentrated pulp by using a neutralizing agent to obtain regulating pulp, then sending the regulating pulp into a pulp flowing box, spraying the regulating pulp onto a forming screen by adopting a pulp spraying mode to obtain wet paper, and extruding and drying the wet paper to obtain the paper.
2. The novel straw paper making method according to claim 1, wherein: the step S1 comprises the following steps:
S11, putting the corn stalks into hot water at 90 ℃ to be soaked for 20-25 minutes, and softening the corn stalks;
S12, pouring softened straws into a double-screw thread rolling machine to extrude and divide threads, pouring caustic soda into the double-screw thread rolling machine, wherein the mass of the caustic soda is 4% -8% of that of the straws, and the double-screw extrusion impregnating machine utilizes two parallel, meshed and co-rotating building block combined screws and screw elements with special structures to dynamically extrude fiber slurry while conveying and complete fiber crushing and dissociation by kneading among fibers under high concentration and high pressure;
And S13, pouring the material extruded by the double-screw thread rolling machine into a reaction bin with the temperature of 90 ℃ for hydrogen peroxide bleaching reaction treatment for 90-100 minutes, and adding stabilizer sodium silicate in the bleaching process.
3. The novel straw paper making method according to claim 1, wherein: the step S2 comprises the following steps:
S21, putting the materials after the reaction is finished into a double-screw thread rolling machine again for extrusion and thread separation, and pouring the extruded materials into a pulping machine for grinding to obtain coarse pulp;
S22, the black water generated in the grinding process firstly adopts a grid to pass through coarse substances and then enters a primary sedimentation tank for sedimentation, then the black water is discharged into a biochemical tank in a pumping mode, a coagulant mixed by aluminum salt and ferric salt is added into the biochemical tank, the biochemical tank is in a coagulation reaction state, and the black water forms fine rock flowers during the coagulation reaction;
s23, adding polyacrylamide into the mixture after the Angelica keiskei flowers are produced to prepare flocculating agents to enable the consolidated flowers to become consolidated flower flocs, pushing out suspended matters under the pushing action of water flow when the water surface floats, drying, mixing the obtained sludge with coal for combustion, and carrying out biochemical treatment on clear water at the bottom for secondary utilization.
4. A novel straw paper making method according to claim 3, characterized in that: the step S3 comprises the following steps:
s31, pouring the coarse pulp into a defibrator at 60-70 ℃ to be submerged for 5-10 minutes, and fully stirring the coarse pulp;
S32, performing secondary pulping on the coarse pulp after the de-submerging is finished by adopting a pulping machine to obtain refined pulp, pouring the refined pulp into a slag remover, removing slag materials with different densities from the pulp by utilizing a centrifugal principle to obtain clean pulp, and collecting the slag materials in a concentrated manner;
And S33, drying and dehydrating the collected slag, enabling the water content in the slag to be lower than 5%, crushing the slag by a crusher, scattering the bonded slag by a scattering machine, removing dust in the scattering process, sieving the scattered slag after the scattering is finished, removing iron materials contained in the slag, and finally obtaining the slag which can be used as an alternative fuel SRF for cogeneration.
5. The novel straw paper making method according to claim 1, wherein: the step S4 includes the steps of:
S41, removing water in the clean pulp by adopting a centrifugal dehydrator to obtain concentrated pulp, pouring the concentrated pulp into a pulp mixing tank, and adjusting the pH value of the concentrated pulp by adopting an acid-base neutralizer to control the pH value to be 6-7PH, thereby obtaining adjusted pulp;
s42, pouring the regulating pulp into a pulp box, spraying the regulating pulp into a forming net in a pulp spraying mode to obtain wet paper, wherein the moisture content of the wet paper is 20% -25%, conveying the obtained wet paper into a press roller for extrusion, controlling the thickness of the wet paper to be 0.104mm, and controlling the moisture content of the wet paper to be 5% -7% in a drying mode.
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