CN115404710A - Technological process of bamboo pulping - Google Patents
Technological process of bamboo pulping Download PDFInfo
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- CN115404710A CN115404710A CN202210991398.4A CN202210991398A CN115404710A CN 115404710 A CN115404710 A CN 115404710A CN 202210991398 A CN202210991398 A CN 202210991398A CN 115404710 A CN115404710 A CN 115404710A
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- 235000017166 Bambusa arundinacea Nutrition 0.000 title claims abstract description 43
- 235000017491 Bambusa tulda Nutrition 0.000 title claims abstract description 43
- 241001330002 Bambuseae Species 0.000 title claims abstract description 43
- 235000015334 Phyllostachys viridis Nutrition 0.000 title claims abstract description 43
- 239000011425 bamboo Substances 0.000 title claims abstract description 43
- 238000004537 pulping Methods 0.000 title claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 119
- 229920005610 lignin Polymers 0.000 claims abstract description 58
- 238000012216 screening Methods 0.000 claims abstract description 50
- 239000000843 powder Substances 0.000 claims abstract description 47
- 238000000227 grinding Methods 0.000 claims abstract description 40
- 239000000835 fiber Substances 0.000 claims abstract description 35
- 238000004880 explosion Methods 0.000 claims abstract description 34
- 239000012634 fragment Substances 0.000 claims abstract description 21
- 229920002678 cellulose Polymers 0.000 claims abstract description 14
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- 238000005520 cutting process Methods 0.000 claims abstract description 6
- 244000144987 brood Species 0.000 claims abstract description 4
- 241001233242 Lontra Species 0.000 claims description 12
- 238000007865 diluting Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 7
- 239000000428 dust Substances 0.000 claims description 7
- 238000007873 sieving Methods 0.000 claims description 7
- 239000011094 fiberboard Substances 0.000 claims description 6
- 241000196324 Embryophyta Species 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 239000002023 wood Substances 0.000 claims description 2
- 238000003801 milling Methods 0.000 claims 3
- 238000011085 pressure filtration Methods 0.000 claims 2
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- 238000005265 energy consumption Methods 0.000 abstract description 11
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- 239000000126 substance Substances 0.000 description 7
- 229920001131 Pulp (paper) Polymers 0.000 description 6
- 238000003825 pressing Methods 0.000 description 4
- 210000004027 cell Anatomy 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
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- 230000002411 adverse Effects 0.000 description 2
- 238000010009 beating Methods 0.000 description 2
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- 239000001257 hydrogen Substances 0.000 description 2
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- 244000007853 Sarothamnus scoparius Species 0.000 description 1
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- 230000005484 gravity Effects 0.000 description 1
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/02—Pretreatment of the raw materials by chemical or physical means
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/06—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/14—Disintegrating in mills
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
- D21D5/02—Straining or screening the pulp
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Abstract
The invention discloses a process method for bamboo pulping, which comprises the following steps: the bamboo material steam explosion process includes cutting bamboo material into small pieces, moistening, steam explosion in a steam explosion machine to separate out lignin, hemicellulose and cellulose; in the silk hammering process, the material after steam explosion enters a silk hammering machine, and a movable knife of the silk hammering machine hammers the material to enable lignin to form lignin fragments or fall off to form powder; a powder screening process, wherein the material after the silk hammering is screened to remove fine lignin fragments, fine fibers and lignin powder; and a high-concentration grinding process, wherein the screened materials are pulped to longitudinally crack and brood and softened to form coarse pulp. The process method for bamboo pulping adopts the thread hammering machine to replace the traditional thread rolling machine, thereby not only saving energy consumption, but also effectively dropping lignin.
Description
Technical Field
The disclosure relates to the technical field of papermaking, in particular to a process method for bamboo pulping.
Background
In the bamboo pulping and papermaking industry, a thread rolling machine is generally adopted to process bamboo chips, but the thread rolling machine has high energy consumption, and the ultrahigh energy consumption of the thread rolling machine becomes an industrial difficulty under the condition that the current call for emission reduction and energy conservation is rising day by day. And the thread rolling machine cannot effectively remove lignin due to extrusion thread separation.
Disclosure of Invention
In order to solve the problems that a thread rolling machine in the related technology has high energy consumption and can not effectively remove lignin, the disclosure provides a process method for bamboo pulping, which can reduce the energy consumption and can effectively remove the lignin.
The invention provides a process method for bamboo pulping, which comprises the following steps:
the bamboo material steam explosion process includes cutting bamboo material into small pieces, moistening, steam explosion in a steam explosion machine to separate out lignin, hemicellulose and cellulose;
in the silk hammering process, the material after steam explosion enters a silk hammering machine, and a movable knife of the silk hammering machine hammers the material to enable lignin to form lignin fragments or fall off to form powder;
a powder screening process, wherein the materials after the hammering are screened to remove fine lignin fragments, fine fibers and lignin powder; and
and in the high-concentration grinding process, the screened material is pulped to longitudinally crack and brood and softened to form coarse pulp.
Optionally, after the hammering process, the process further includes: and in the air supply and dust removal process, negative pressure is generated by a negative pressure fan to accelerate the discharging speed of the material after the silk hammering process and absorb dust on the material through wind power.
Optionally, before the powder sieving process, the process method further includes a drying process of drying the material before the powder sieving process.
Optionally, in the powder screening process, a multi-stage vibrating screen is adopted to separate the mixture of the fiber yarns and the powder formed by the hammer yarns, so as to separate lignin fragments, powder and fine fibers.
Optionally, the powder screening process screens out lignin fragments, powder and fine fibers by using a water washing and water spraying or air blowing mode.
Optionally, after the high-concentration grinding process, the method further comprises a high-concentration screening process, wherein the material after the high-concentration grinding process is screened by a high-concentration grinding screening device to separate large materials and small materials, and the separated large materials are returned to the previous process to perform a second high-concentration grinding process.
Optionally, after the high concentration screening process, the method further comprises a low concentration grinding process, wherein the small materials screened by the high concentration screening process enter a low concentration grinding device to be subjected to low concentration grinding and pulping to form fine pulp.
Optionally, the high-consistency screen process comprises:
diluting, namely diluting the high-concentration ground material, wherein the diluted concentration is less than or equal to 15%;
the screening process, the material after will diluting passes through high enriched mill screening plant, high enriched mill screening plant has the otter board, and during little material fell into the oar pond through the mesh of otter board, the bold material was intercepted on the otter board, the otter board rotated by the drive arrangement drive, when the otter board rotated, the bold material fell in the take-up (stock) pan of otter board side below.
Optionally, after the low-concentration grinding process, the method further includes a filter pressing process, and the material after the low-concentration grinding process is dehydrated to form a secondary fiberboard.
Optionally, after the high-consistency grinding process, the method further comprises a filter pressing process, wherein the material after the high-consistency grinding process is dehydrated to form a first-grade fiberboard.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
the invention provides a process method for bamboo pulping, which comprises the following steps: the bamboo material steam explosion process includes cutting bamboo material into small pieces, moistening, steam explosion in a steam explosion machine to separate out lignin, hemicellulose and cellulose; in the silk hammering process, the material after steam explosion enters a silk hammering machine, and a movable knife of the silk hammering machine hammers the material to enable lignin to form lignin fragments or fall off to form powder; a powder screening process, wherein the materials after the hammering are screened to remove fine lignin fragments, fine fibers and lignin powder; and a high-concentration grinding process, wherein the sieved materials are pulped to longitudinally crack and broom the materials and soften the materials to form coarse pulp. According to the technical method for bamboo pulping, the traditional thread rolling machine is replaced by the thread hammering machine, so that energy consumption is saved, lignin can be effectively dropped off, a powder screening process is added after the thread hammering process, fine lignin fragments, fine fibers and lignin powder are screened out, and the quality of paper pulp is improved by removing adverse substances damaging the quality of the paper, so that the prepared paper has better performances in the aspects of flexibility, strength, color, burst strength and the like.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 illustrates a bamboo pulping process according to an exemplary embodiment.
Figure 2 is a schematic diagram illustrating the construction of a material screening system according to one exemplary embodiment.
Detailed Description
For further explanation of the principles and construction of the present disclosure, reference will now be made in detail to the preferred embodiments of the present disclosure, which are illustrated in the accompanying drawings.
Compared with the traditional method adopting a thread rolling machine, the process method provided by the invention can save 10% -15% of energy consumption, can better treat lignin and fine fibers of steam explosion materials, reduces the fine fiber rate of paper pulp, and improves the quality of the paper pulp. Specifically, as shown in fig. 1, the bamboo pulping process of the present invention comprises the following steps:
s110: the bamboo material steam explosion process includes cutting bamboo material into small pieces, moistening, steam explosion in a steam explosion machine to separate out lignin, hemicellulose and cellulose;
s120: in the silk hammering process, the material after steam explosion enters a silk hammering machine, and a movable knife of the silk hammering machine hammers the material to enable lignin to form lignin fragments or fall off to form powder;
s130: a powder screening process, wherein the material after the silk hammering is screened to remove fine lignin fragments, fine fibers and lignin powder; and
s140: and in the high-concentration grinding process, the screened material is pulped to longitudinally crack and brood and softened to form coarse pulp.
Before step S110, the method further includes the steps of removing dust, cutting, sorting, soaking and the like for the bamboo wood.
The soaked bamboo blocks enter step S110, namely steam explosion is carried out in steam explosion equipment, 0.2-2.5 MPa of saturated steam is introduced into the steam explosion equipment, pressure is maintained for 1-20 min, instantaneous pressure relief is carried out to ensure that the bamboo blocks are exploded in a steam explosion machine within 5-20 ms, and the temperature of the materials is instantly reduced to 40-80 ℃.
After the bamboo blocks are sent into a sealed steam explosion machine, the pressure of water vapor introduced into the steam explosion machine is controlled within the range of 0.2-2.5 MPa, the pressure is maintained for 1-20 min, the bamboo blocks are in a high-temperature, high-pressure and high-humidity state, and the pressure is rapidly relieved, so that the bamboo blocks are exploded in the steam explosion machine within 5-20 ms. In the steam explosion process, steam enters a fiber raw material and permeates pores and cell walls among fibers, hydrogen bond effect is generated with partial hydroxyl in cellulose, the cellulose starts to be softened and degraded under the combined action of water vapor and heat, low-molecular substances start to be dissolved out, the connection effect among the fibers starts to be weakened, after pressure release, the internal pressure of bamboo cells is far greater than external pressure, when the process is in a time burst in a short time, the steam in the cells cannot be released from the pores, the explosion can be generated in the cells due to the huge pressure of the steam, the structures of the cellulose, the hemicellulose and lignin are damaged, the hydrogen bonds among the cellulose are broken, the connection effect among the fibers is reduced, and the cellulose, the hemicellulose and the lignin are separated.
The steam explosion process can be carried out without adding any chemical preparation, and belongs to a pure physical process treatment process.
The above steam explosion method is only an example, and in actual production, the steam pressure value, the pressure holding time and the steam explosion time are adjusted according to the quality of the final product or bamboo material, the growth time and other factors.
And after the steam explosion process is finished, primarily separating the cellulose, the hemicellulose and the lignin, wherein the fiber is longer and thicker, and the next step, namely the step S120 of silk hammering process, is required to further separate the cellulose, the hemicellulose and the lignin.
In step S120, the steam exploded material enters a silk hammering machine, the interior of the silk hammering machine is provided with a closed chamber, a plurality of movable knives are located in the closed chamber, the movable knives are mounted on a rotating wheel, when the rotating wheel rotates, the material in the closed chamber is hammered, the cellulose is further divided into filaments, and meanwhile, the lignin is hammered into lignin fragments or falls off to form powder.
In step S120, since the thread splitting is performed by the thread hammering machine and the thread splitting is performed by hitting the bamboo chips, energy consumption required by the thread hammering machine is significantly reduced compared to a thread rolling machine that performs thread splitting by mutual extrusion between the blades. The thread rolling machine is replaced by the thread hammering machine, so that the energy consumption is greatly saved on the premise of meeting the same quality, and the energy consumption of the same capacity is only 10% -15% of that of the thread rolling machine.
In addition, because the hammer silk machine processes the material through the mode of beating, so can make the lignin that has just tentatively separated break down by the hammer, form the powder, make lignin can separate out from the cellulose.
After the hammering process, the process method further comprises the following steps: and in the air supply and dust removal process, negative pressure is generated by a negative pressure fan to accelerate the discharging speed of the material after the silk hammering process, and dust on the material is sucked by wind power. Install negative-pressure air blower equipment near the discharge gate of hammer silk machine, the material in the hammer silk machine passes through transmission device such as transmission band and transmits to negative-pressure air blower's below, because negative-pressure air blower produces the negative pressure near the discharge gate of hammer silk machine for the material of hammer silk machine discharge gate passes through the diaphragm orifice and is sucked by the negative pressure, so accelerate the ejection of compact speed of hammer silk machine, improve the productivity.
Before entering the powder sieving process, the process method also comprises a drying process for drying the materials before powder sieving. The material may be dried, for example, by drying or blowing hot air, thereby facilitating subsequent processing to screen out the powder.
In step S130, the dried material is subjected to powder screening. The powder screening method can screen out lignin fragments, powder, fine fibers and other small materials by adopting a water washing and water spraying or air blowing mode. The powder screening process can also adopt a multi-stage vibrating screen to separate the mixture of fiber yarns and powder formed by the hammer yarns. Specifically, the dried material flows into the multistage vibrating screen, the multistage vibrating screen is provided with a plurality of layers of screen meshes, when the material flows into the screen meshes, the motor drives the screen meshes to vibrate, powder in the material, fine lignin fragments and fine fibers fall below the screen meshes through the screen meshes, and other substances are blocked on the screen meshes, so that the fine lignin fragments, the fine fibers and the lignin powder are screened out.
The lignin molecules contain phenolic hydroxyl groups, the lignin molecules are slightly acidic and are easy to be oxidized to yellow, and the acidity of the lignin molecules can enable paper to yellow and become crisp, so that the lignin has a strong destructive effect on the paper, the more the substances are left in the paper pulp, the poorer the quality of the paper is, and most of the lignin can be removed through the screening powder, and the influence on the quality of the paper is reduced. In addition, the fines also have a certain influence on the strength of the paper. Therefore, most of substances having an influence on the quality of paper can be removed through the powder screening process, and thus, the quality of paper pulp and, consequently, the quality of paper can be improved.
After passing through the powder screening in step S130, the material from which the lignin fragments, powder and fine fibers are removed is conveyed to a high-consistency grinding device through a heat-preservation conveying pipe, and the material after powder screening is pulped to longitudinally crack, cut and crush the material and soften the material to form coarse pulp.
The high-concentration grinding equipment makes the material longitudinally split and broomed by the mutual friction, extrusion, kneading, twisting and other actions of the high-concentration pulp between the grinding discs, so that the fiber is beaten. Simultaneously, a large amount of friction heat is generated to soften the fiber.
The fibers after high-concentration pulping are broomed and longitudinally split, the fibers are soft and rich in swelling property, the fibers are twisted, and the high-concentration pulping paper has good shrinkage performance and can improve the strength, toughness and bursting strength of the paper.
Optionally, the material after high-concentration grinding can be subjected to a high-concentration screening process according to the requirement on the paper quality, the process is used for separating large materials and small materials after high-concentration grinding, the large materials after separation are subjected to two high-concentration grinding, the small materials do not need to be subjected to two high-concentration grinding, the damage of the two high-concentration grinding to the ground fibers is avoided, and the increase of fine fibers is avoided.
Specifically, as shown in fig. 2, the high-consistency screening process is correspondingly provided with a material screening system, and the material screening system 100 comprises a paddle tank 11, a screening device 12, a pulp tank 13, a driving device (not shown) and a receiving tray 14. The paddle tank 11 is used for containing diluted materials. Below the paddle well is a screening device 12, which screening device 12 has a mesh panel 121, which mesh panel 121 has a plurality of mesh openings.
Optionally, the material screening system 100 is further provided with a backflushing device 15 to backflush the mesh sheet 121 with fluid to prevent material from clogging the mesh.
When the material in the paddle tank flows to the screening device 12, part of the material passes through the mesh openings, and the other part of the material (i.e. the bulk material) is intercepted on the mesh plate 121. Part of the materials passing through the meshes flow into the stock chest 13, and the stock chest 13 guides part of the materials to the low-concentration grinding process. The screen plate 121 is driven by the driving device to rotate, that is, to move in the direction indicated by the arrow in fig. 2, when the screen plate 121 rotates, another part of the material is driven to move, and when the screen plate moves to the edge, another part of the material falls into the material receiving tray 14 below the side of the screening device under the action of gravity. Therefore, the large materials and the small materials are separated, so that the damage of the two high-concentration mills to the milled fibers can be avoided, the power consumption required by the two high-concentration mills is greatly reduced, and the pressure of subsequent process equipment is reduced.
Specifically, the high-concentration screening process comprises the following steps:
diluting, namely diluting the high-concentration ground material in a paddle pool, wherein the diluted concentration is less than or equal to 15%;
in the screening process, diluted materials pass through a high-concentration mill screening device, small materials fall into a paddle pool through meshes of a screen plate, large materials are intercepted on the screen plate, the screen plate is driven by a driving device to rotate, and when the screen plate rotates, the large materials fall into a material receiving disc below the side of the screen plate.
As an optional process, after the large material is subjected to the two high-concentration screening processes, the diluting process and the screening process can be carried out again, and the small material penetrating through the screen plate enters the slurry tank and is introduced into the low-concentration grinding process. And determining whether to perform three high-concentration grinding processes according to actual requirements on the large materials separated out again. Generally, after the majority of materials are subjected to two high-concentration grinding processes, most of the materials enter the paddle tank through the screen plate of the screening device.
And carrying out low-concentration grinding and pulping on the small materials screened by the high-concentration screening process to form fine pulp.
The gap between the blades for low-consistency beating is smaller, even the thickness of a single fiber is reached, so that the fiber is beaten, and a fine paddle is formed.
And after the low-concentration grinding process, performing a filter pressing process, namely dehydrating the material after the low-concentration grinding process to form the secondary fiberboard.
As an optional process, after the high-consistency grinding process, according to the requirement on the paper quality, a high-consistency screening process and a low-consistency grinding process can also be omitted, and a filter pressing process is directly carried out to remove moisture in the materials and form a first-grade fiberboard.
Therefore, in conclusion, the process method for bamboo pulping provided by the invention adopts the hammering machine to replace the traditional thread rolling machine, so that the energy consumption is saved, the lignin can be effectively dropped, in addition, the powder sieving process is added after the hammering process, the fine lignin fragments, the fine fibers and the lignin powder are sieved, and the quality of paper pulp is improved by removing the adverse substances which damage the quality of the paper, so that the performance of the prepared paper in the aspects of flexibility, strength, color, breakage resistance and the like is better.
The above description is only for the purpose of illustrating the preferred embodiments of the present disclosure and is not to be construed as limiting the scope of the present disclosure, but rather is intended to cover all equivalent structural changes made by applying the teachings of the present disclosure to the accompanying drawings.
Claims (10)
1. The technical method for bamboo pulping is characterized by comprising the following steps:
the bamboo material steam explosion process includes cutting bamboo material into small pieces, moistening, steam explosion in a steam explosion machine to separate out lignin, hemicellulose and cellulose;
in the silk hammering process, the material after steam explosion enters a silk hammering machine, and a movable knife of the silk hammering machine hammers the material to enable lignin to form lignin fragments or fall off to form powder;
a powder screening process, wherein the materials after the hammering are screened to remove fine lignin fragments, fine fibers and lignin powder; and
and in the high-concentration grinding process, the screened material is pulped to longitudinally crack and brood and softened to form coarse pulp.
2. The bamboo pulping process of claim 1, wherein after the hammering process, the process further comprises: and in the air supply and dust removal process, negative pressure is generated by a negative pressure fan to accelerate the discharging speed of the material after the silk hammering process and absorb dust on the material through wind power.
3. The bamboo pulping process of claim 1, wherein the process further comprises a drying process of drying the material before the screening process.
4. The bamboo pulping process of claim 1, wherein the screening process uses a multistage vibrating screen to separate the mixture of fiber filaments and powder formed by the hammer filaments to separate out lignin fragments, powder and fine fibers.
5. The bamboo wood pulping process of claim 1, wherein the powder sieving process is used for sieving lignin fragments, powder and fine fibers by water washing and water spraying or air blowing.
6. The process method for bamboo pulping according to claim 1, wherein after the high-consistency grinding process, the method further comprises a high-consistency screening process, wherein the materials after the high-consistency grinding process are screened by a high-consistency grinding screening device to separate large materials and small materials, and the separated large materials are returned to the previous process to be subjected to a secondary high-consistency grinding process.
7. The bamboo pulping process of claim 6, wherein after the high consistency screening process, the method further comprises a low consistency grinding process, wherein the small materials screened by the high consistency screening process enter a low consistency grinding device for low consistency grinding and pulping to form fine pulp.
8. The bamboo pulping process of claim 6, wherein the high consistency screen process comprises:
diluting, namely diluting the high-concentration ground material, wherein the diluted concentration is less than or equal to 15%;
the screening process, the material after will diluting passes through high enriched mill screening plant, high enriched mill screening plant has the otter board, and during little material fell into the oar pond through the mesh of otter board, the bold material was intercepted on the otter board, the otter board was rotated by the drive arrangement drive, when the otter board rotated, the bold material fell in the take-up (stock) pan of otter board side below.
9. The process of bamboo pulping according to claim 7, wherein after the low consistency milling process, the process further comprises a pressure filtration process, wherein the low consistency milling process is followed by dewatering the material to form a secondary fiberboard.
10. The process of bamboo pulping according to claim 1, wherein after the high consistency milling process, the process further comprises a pressure filtration process, wherein the high consistency milled material is dewatered to form a primary fiber board.
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| CN102230285A (en) * | 2011-06-14 | 2011-11-02 | 李刚荣 | Pulping system and pulping method for environment-friendly mechanical pulp and chemical mechanical pulp of non-woody crops |
| CN109797590A (en) * | 2019-03-25 | 2019-05-24 | 清正生态科技(苏州)有限公司 | The anhydrous pulping system of plant fiber steam explosion |
| CN111155347A (en) * | 2020-01-20 | 2020-05-15 | 天津科技大学 | Method for extracting poplar cellulose by coupling steam explosion method with weak alkali |
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2022
- 2022-08-17 CN CN202210991398.4A patent/CN115404710A/en active Pending
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|---|---|---|---|---|
| WO1989007169A1 (en) * | 1988-02-05 | 1989-08-10 | Beghin-Say, S.A. | Process for removing the fibre from a lignocellulose material |
| CN102230284A (en) * | 2011-05-06 | 2011-11-02 | 西南交通大学 | Ultrasonic-assistant steam explosion pretreatment process for extracting straw cellulose of crops |
| CN102230285A (en) * | 2011-06-14 | 2011-11-02 | 李刚荣 | Pulping system and pulping method for environment-friendly mechanical pulp and chemical mechanical pulp of non-woody crops |
| CN109797590A (en) * | 2019-03-25 | 2019-05-24 | 清正生态科技(苏州)有限公司 | The anhydrous pulping system of plant fiber steam explosion |
| CN111155347A (en) * | 2020-01-20 | 2020-05-15 | 天津科技大学 | Method for extracting poplar cellulose by coupling steam explosion method with weak alkali |
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