A pulping apparatus and method for making paper from coconut shell

Abstract

The application relates to the technical field of papermaking, and discloses a pulping equipment and method for papermaking with coconut shell, which comprises the following steps: obtaining brown coconut fiber powder of mature coconut and white coconut fiber powder of immature coconut, respectively removing lignin to obtain brown coconut fiber pretreatment product and white coconut fiber pretreatment product, mixing after modification treatment, fumigating at 120-150 DEG C to obtain fiber slurry, mixing with additives, and grinding and dewatering to obtain paper pulp. The application uses coconut shell as raw material, not only provides a new raw material source for the papermaking industry, but also helps to solve the problem of coconut shell waste treatment, and has the dual advantages of environmental protection and sustainable development. Through the pulping equipment and method, paper products with stable quality and high strength can be produced, and the needs of different industrial and living papers can be met.

Description

Technical Field

[0001] This invention relates to the field of papermaking technology, and more specifically, to a pulping device and method for making paper from coconut shells. Background Technology

[0002] With the rapid development of society and the economy, the utilization and development of green and renewable biomass have received increasing attention. However, how to effectively separate biomass resources to maximize their utilization remains a pressing challenge. In the paper industry, traditional wood pulp production methods not only consume huge amounts of forest resources but also cause environmental pollution. Therefore, developing a new, environmentally friendly papermaking raw material is crucial.

[0003] Coconut shells, a byproduct of coconut fruit, are not only abundant but also inexpensive and versatile. As a renewable biomass resource, coconut shells contain a high proportion of cellulose and possess good mechanical strength and chemical stability, making them an ideal raw material for pulp production. Nevertheless, due to the unique structure and composition of coconut shells, their direct use in papermaking still faces some technical challenges. Summary of the Invention

[0004] In view of this, the present invention proposes a pulping equipment and method for coconut shell papermaking, aiming to provide an environmentally friendly and efficient coconut shell pulping process.

[0005] This invention proposes a pulping method for coconut shell papermaking, comprising:

[0006] Coconut fiber powder from mature coconuts and immature coconuts was obtained separately, wherein the coconut fiber powder from mature coconuts was brown and the coconut fiber powder from immature coconuts was white.

[0007] The lignin in the brown coconut fiber powder and the white coconut fiber powder were removed respectively to obtain brown coconut fiber pretreated product and white coconut fiber pretreated product.

[0008] The brown coconut fiber pretreated product and the white coconut fiber pretreated product were modified to obtain the brown coconut fiber modified product and the white coconut fiber modified product, respectively.

[0009] The brown coconut fiber modified product and the white coconut fiber modified product are mixed and then fumigated at 120-150℃ to obtain fiber pulp; the fiber pulp is mixed with additives and then milled and dewatered to obtain paper pulp.

[0010] Preferably, the process of removing lignin from the brown coconut fiber powder and the white coconut fiber powder respectively to obtain the brown coconut fiber pretreated product and the white coconut fiber pretreated product includes:

[0011] The brown coconut fiber powder is soaked in an alkaline solution for alkaline chemical treatment and then subjected to steam explosion treatment to obtain the brown coconut pretreated product; wherein, the steam explosion treatment step includes heating the alkaline chemically treated brown coconut fiber powder to 180-220°C in a sealed container, applying high-pressure steam, maintaining the high pressure for 1-2 minutes, and then releasing the pressure.

[0012] The white coconut fiber powder was enzymatically hydrolyzed and then extracted at low temperature to obtain the pretreated white coconut fiber product.

[0013] Preferably, the alkaline solution is a sodium hydroxide solution with a concentration of 10-15%.

[0014] Preferably, the alkaline chemical treatment involves immersing the brown coconut fiber powder in a sodium hydroxide solution at a temperature of 80-100°C for 2-4 hours.

[0015] Preferably, the bioenzyme is laccase.

[0016] Preferably, the enzymatic hydrolysis conditions include a temperature of 30-50°C, a pH of 5.0-7.0, and a time of 8-12 hours.

[0017] Preferably, the solvent for the low-temperature extraction is an ethanol-water mixture.

[0018] Preferably, the low-temperature extraction conditions are a temperature of 50-60°C and a continuous treatment time of 2-3 hours.

[0019] Preferably, when modifying the brown coconut fiber pretreated product and the white coconut fiber pretreated product to obtain the brown coconut fiber modified product and the white coconut fiber modified product, the modification process includes:

[0020] The brown coconut fiber pretreated product and epoxy resin are mixed and dispersed, and then crosslinked by heating at 60-80℃ for at least 2 hours to obtain the brown coconut fiber modified product.

[0021] The white coconut fiber pretreated product and titanium dioxide were mixed and dispersed, and then heated in a polyvinyl alcohol aqueous solution for at least 1 hour to obtain the white coconut fiber modified product.

[0022] Preferably, the fumigation solution used when fumigating the brown coconut fiber modified product and the white coconut fiber modified product at 120-150°C is a mixture of coconut water and rice vinegar.

[0023] Preferably, the concentration of the rice vinegar is 4%-7%.

[0024] Preferably, the additive is polyvinyl alcohol, cellulose ether, fluoride additive, and talc.

[0025] Preferably, the weight ratio of polyvinyl alcohol, cellulose ether, fluoride additive and talc is 1-5:0.5-3:0.1-2:5-10.

[0026] Preferably, the weight ratio of the fiber pulp to the additive is 8-10:1.

[0027] The present invention also provides a pulp, which is prepared by the above-described pulping method for coconut shell papermaking.

[0028] The present invention also provides an application of the above-mentioned pulp in papermaking.

[0029] The present invention also provides a pulping apparatus for coconut shell papermaking, used to implement the above-mentioned pulping method for coconut shell papermaking, comprising:

[0030] The raw material processing unit is used to crush the coconut shreds of mature and immature coconuts to obtain brown coconut fiber powder and white coconut fiber powder.

[0031] A pretreatment unit is used to remove lignin from the brown coconut fiber powder and the white coconut fiber powder respectively, to obtain brown coconut fiber pretreatment product and white coconut fiber pretreatment product;

[0032] The pretreatment unit pretreats brown coconut fiber powder and white coconut fiber powder to obtain brown coconut fiber pretreated product and white coconut fiber pretreated product.

[0033] A modification processing unit is used to modify the brown coconut fiber pretreatment product and the white coconut fiber pretreatment product respectively to obtain a brown coconut fiber modified product and a white coconut fiber modified product.

[0034] A fumigation unit is used to mix the brown coconut fiber modified product and the white coconut fiber modified product and then fumigate them.

[0035] The mixing and refining unit is used to mix the fumigated fiber pulp with additives, then refine and dewater it to obtain pulp.

[0036] Preferably, the pretreatment unit includes an alkaline chemical treatment device, a steam explosion device, an enzymatic hydrolysis device, and a low-temperature extraction device; the alkaline chemical treatment device is used to soak brown coconut fiber powder in an alkaline solution for alkaline chemical treatment; the steam explosion device is used to perform steam explosion treatment; the enzymatic hydrolysis device is used to enzymatically hydrolyze white coconut fiber powder; and the low-temperature extraction device is used to perform low-temperature extraction treatment.

[0037] The modified processing unit includes a mixing and dispersing device and a heating device; the mixing and dispersing device and the heating device are used to mix and disperse the brown coconut fiber pretreatment product with epoxy resin and then heat it for crosslinking; the mixing and dispersing device and the heating device are also used to mix and disperse the white coconut fiber pretreatment product with titanium dioxide and then place it in a polyvinyl alcohol aqueous solution and heat it.

[0038] The fumigation unit includes a fumigation tank for fumigating the mixed products.

[0039] Preferably, the coconut shell pulping equipment further includes a control system;

[0040] The control system is used to control the operation of the raw material processing unit, pretreatment unit, modification unit, fumigation unit, and mixing and grinding unit.

[0041] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0042] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0043] 1. High resource utilization rate: By utilizing both mature and immature coconut shreds, the coconut shell is fully utilized, reducing resource waste.

[0044] 2. Highly environmentally friendly: It uses biological enzymes and natural materials (such as rice vinegar and coconut water) for treatment, which reduces dependence on chemical agents and reduces environmental pollution.

[0045] 3. Improved paper performance: Through innovative modification methods, the tensile strength, tear strength, and water resistance of the paper are enhanced, thereby improving the quality and applicability of paper products.

[0046] 4. Simplified process: The equipment design, which integrates multiple steps, improves production efficiency, reduces production costs, and meets the needs of large-scale industrial production.

[0047] 5. Diversity and adjustability: By adjusting the proportion of raw materials and the type of additives, paper products with different properties and uses can be flexibly produced according to market demand to meet diverse consumer needs.

[0048] In summary, this invention has significant advantages in terms of resource utilization, environmental friendliness, paper performance, and production efficiency, and promotes the development of sustainable papermaking technology. Attached Figure Description

[0049] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0050] Figure 1 This is a schematic diagram of the pulping equipment for coconut shell papermaking according to the present invention. Detailed Implementation

[0051] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, embodiments and features in the embodiments of the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0052] Example 1: Pulping Method for Coconut Shell Papermaking

[0053] I. Obtaining Coconut Fiber Powder

[0054] 1. Selecting raw materials

[0055] Mature coconuts: Choose coconuts with brown or yellow shells and firm, thick flesh.

[0056] Immature coconuts: Choose coconuts whose shells are still green and whose flesh is tender and thin.

[0057] 2. Remove the shell and take the meat.

[0058] Shelling: Use a knife or machine to remove the coconut's outer shell.

[0059] Extracting the meat: Removing the coconut meat from inside the coconut.

[0060] 3. Washing and drying

[0061] Cleaning: Clean the extracted coconut meat to remove any residue and other impurities from the coconut shell.

[0062] Drying: Place the cleaned coconut meat in a dryer to dry it and remove moisture.

[0063] 4. Grinding and processing

[0064] Grind: Grind the dried coconut meat into a fine powder.

[0065] The particle sizes of brown coconut fiber powder and white coconut fiber powder are 0.1-0.5 mm and 0.05-0.2 mm, respectively.

[0066] II. Pulping Process

[0067] 1. Remove lignin

[0068] 1.1 Method for removing lignin from brown coconut fiber powder

[0069] Brown coconut fiber powder comes from mature coconuts. The fibers are relatively coarse and have a relatively high lignin content, requiring an efficient lignin removal method.

[0070] Alkaline chemical method: Brown coconut fiber powder is soaked in a 10% sodium hydroxide (NaOH) solution at a controlled temperature of 85±3℃ for approximately 2 hours. This method effectively disrupts the lignin structure in the brown fibers, dissolving and removing a large amount of lignin while preserving the fiber's toughness and strength.

[0071] Assisted steam explosion method: After alkaline chemical treatment, a further steam explosion treatment is carried out. The alkaline-treated brown coconut fiber is rapidly heated to 200°C in a sealed container, and high-pressure steam is applied. After maintaining the high pressure for 2 minutes, the pressure is rapidly released to create an "explosion" effect.

[0072] 1.2 Method for removing lignin from white coconut fiber powder

[0073] White coconut fiber powder comes from immature coconuts. Its fibers are finer and softer, with a relatively low lignin content, making it suitable for gentle lignin removal methods.

[0074] Bio-enzymatic method: White coconut fiber powder is treated using a lignin-degrading enzyme (laccase). The process is controlled at a temperature of 40±3℃, a pH of 6.0±0.2, and a time of 9 hours. Laccase can specifically decompose lignin in white coconut fiber without damaging the fiber's cellulose structure. This method is environmentally friendly and gentle, effectively removing lignin while maintaining the fiber's softness and fineness.

[0075] Low-temperature solvent extraction: To improve the lignin removal effect, after bio-enzyme treatment, a low-temperature extraction was performed using an ethanol-water mixed solvent (volume ratio 1:1), with the temperature controlled at 55±3℃ and the treatment lasting for 2 hours. The solvent can dissolve the residual lignin while preserving the mechanical properties of the fiber.

[0076] 2. Modification treatment

[0077] 2.1 Modification method of brown coconut fiber pretreatment product

[0078] Brown coconut fiber, due to its high strength and toughness, is suitable for reinforcement modification methods:

[0079] Cross-linking polymer modification method: The pretreated brown coconut fiber product is mixed with a modifier (epoxy resin) and uniformly dispersed by mechanical stirring. Then, it is heated at 60-80℃ for 2-3 hours to promote the cross-linking reaction between the polymer and the hydroxyl groups in the coconut fiber, forming a three-dimensional network structure. This method can significantly improve the strength and water resistance of brown coconut fiber, giving it better performance in pulp.

[0080] 2.2 Modification methods for pretreated white coconut fiber products

[0081] White coconut fiber is finer and is suitable for gentle modification methods to enhance its properties.

[0082] Nanomaterial modification method: The pretreated white coconut fiber product is mixed with nano-sized titanium dioxide, and ultrasonic dispersion is used to ensure uniform dispersion. This process is carried out at room temperature for 30 minutes. The introduction of nanomaterials not only improves the strength of the white coconut fiber but also endows it with photocatalytic properties, which helps to improve the stain resistance and antibacterial properties of subsequent paper.

[0083] Polymer coating method: The nano-modified white coconut fiber is placed in a polyvinyl alcohol (PVA) aqueous solution and stirred evenly. Then, it is heated at 65±3℃ to form a polymer coating layer on the fiber surface. This step continues for 1 hour to ensure that the polymer is uniformly coated on the surface of the white coconut fiber. This coating method not only improves the surface smoothness of the white coconut fiber but also enhances its water resistance and UV resistance.

[0084] The aforementioned modification methods effectively enhance the properties of both brown and white coconut fiber. Brown coconut fiber, modified with cross-linked polymers and natural plant extracts, exhibits improved mechanical properties and antibacterial activity; while white coconut fiber, through nanomaterial and polymer coating, boasts enhanced strength and other functional characteristics. This innovative modification approach lays a solid foundation for subsequent pulp preparation.

[0085] 3. Fumigation

[0086] Brown and white modified coconut fiber products were mixed at a weight ratio of 60:40 and then fumigated. The fumigation solution was a mixture of coconut water and rice vinegar at a volume ratio of 3:1. The rice vinegar...

[0087] The fumigation solution was heated to 130±5℃ and fumigated continuously for 2 hours. During this process, the minerals in the coconut water and the acidic components of the rice vinegar interact, promoting the structural stability of the fibers and forming a stronger fiber network structure. The acidic and electrolyte properties of the fumigation solution effectively activate the functional groups of the modified products, enhancing their adhesion and interaction forces, resulting in better overall performance of the modified fibers in pulp.

[0088] 4. Grinding

[0089] The fiber pulp obtained after fumigation is mixed with additives at a weight ratio of 9:1 to obtain the pulp to be ground. The additives are polyvinyl alcohol, cellulose ether, fluoride additives and talc, with a weight ratio of 3:1:0.5:5.

[0090] The slurry to be ground is fed into a high-shear refiner and ground at 4000 rpm for 0.5 hours. During the grinding process, the slurry temperature is maintained between 40-60℃, and the temperature is adjusted by adding a small amount of water.

[0091] 5. Dehydration

[0092] The pulp after grinding is transferred to a vacuum dewatering machine, where a vacuum is applied to allow the water to evaporate rapidly under low pressure, resulting in a final pulp moisture content of 40±3%.

[0093] Example 2

[0094] The specific preparation method is the same as in Example 1, except that the weight ratio of the brown coconut fiber modified product to the white coconut fiber modified product is 50:50.

[0095] Example 3

[0096] The specific preparation method is the same as in Example 1, except that the weight ratio of the brown coconut fiber modified product to the white coconut fiber modified product is 70:30.

[0097] Experimental Example 1

[0098] The pulp prepared in Examples 1-3 is used for papermaking, and the specific steps include:

[0099] I. Papermaking Steps

[0100] 1. Slurry preparation

[0101] The treated pulp is mixed with water in a certain proportion to make a pulp suspension with a concentration of 2%.

[0102] 2. Molding

[0103] The pulp is poured into the forming machine, where excess water is removed by gravity and vacuum extraction, allowing the pulp to spread evenly into wet paper.

[0104] 3. Pressing

[0105] A press is used to apply pressure to wet paper to further remove moisture and increase the paper's density.

[0106] 4. Drying

[0107] The wet paper is dried using a dryer until the moisture content of the paper is reduced to 5%.

[0108] 5. Sorting and Cutting

[0109] After drying, the paper is flattened, sorted, and cut into the required specifications for easy subsequent testing and application.

[0110] II. Paper Preparation with Different Proportions of Modified Products

[0111] Based on different ratios of brown and white modified coconut fiber products, the following three types of paper were prepared:

[0112] 1. Paper A: Brown coconut fiber modified product: White coconut fiber modified product = 60:40;

[0113] 2. Paper B: Brown coconut fiber modified product: White coconut fiber modified product = 50:50;

[0114] 3. Paper C: Brown coconut fiber modified product: White coconut fiber modified product = 70:30.

[0115] III. Performance Testing and Characterization

[0116] The properties of the three types of paper were tested and characterized, with the main test indicators including tensile strength, tear strength, whiteness, and thickness.

[0117] Detection method:

[0118] 1. Tensile strength: The maximum load-bearing capacity of paper during the stretching process is measured using an electronic tensile testing machine, and the unit is N / m.

[0119] 2. Tear strength: The force required for paper to tear during the tearing process is measured using a tear strength tester, and the unit is mN.

[0120] 3. Whiteness: The intensity of reflected light on paper is measured using a whiteness meter, and the unit is ISO whiteness.

[0121] 4. Thickness: The thickness of the paper is measured using a thickness gauge, and the unit is millimeters (mm).

[0122] The experimental data are shown in Table 1:

[0123] Table 1

[0124]

[0125]

[0126] Results analysis:

[0127] 1. Tensile strength: Paper C has the highest tensile strength, indicating that a higher proportion of brown coconut fiber modification products enhances the strength of the paper.

[0128] 2. Tear strength: Paper C exhibits the best tear strength, indicating its superior tear resistance, making it suitable for packaging materials with high requirements.

[0129] 3. Whiteness: Paper C has the highest whiteness and is suitable for applications with high requirements for appearance.

[0130] 4. Thickness: Paper C is slightly thicker, possibly due to its higher content of brown coconut fiber modified products, which can increase the paper's volume and feel to some extent.

[0131] In summary, the coconut shell papermaking technology of the present invention has the following advantages:

[0132] Using coconut shells as raw materials not only enables the reuse of waste resources, but also reduces dependence on traditional papermaking raw materials such as wood, which contributes to environmental protection and sustainable development.

[0133] Through modification treatment, the performance of coconut fiber is improved, giving the paper additional functional characteristics, such as antibacterial properties, photocatalytic properties, water resistance and UV resistance, thus broadening the application range of the paper.

[0134] The prepared paper exhibits excellent performance in tensile strength, tear strength, whiteness, and thickness, meeting the performance requirements of different fields.

[0135] Examples and test cases of this technology show that by adjusting the ratio of brown coconut fiber and white coconut fiber modified products, the performance of the final paper can be flexibly controlled, making customized paper production possible.

[0136] The innovation of this technology lies in its combination of traditional papermaking processes with modern material modification techniques, providing new ideas and methods for developing new environmentally friendly paper materials.

[0137] Meanwhile, it is understood that the above method can be carried out using a pulping device for coconut shell papermaking, such as... Figure 1 (As shown) includes:

[0138] The raw material processing unit is used to crush the coconut shreds of mature and immature coconuts to obtain brown coconut fiber powder and white coconut fiber powder.

[0139] The pretreatment unit is used to remove lignin from the brown coconut fiber powder and the white coconut fiber powder respectively to obtain brown coconut fiber pretreatment product and white coconut fiber pretreatment product; the pretreatment unit pretreatments the brown coconut fiber powder and the white coconut fiber powder to obtain brown coconut fiber pretreatment product and white coconut fiber pretreatment product.

[0140] A modification processing unit is used to modify the brown coconut fiber pretreatment product and the white coconut fiber pretreatment product respectively to obtain a brown coconut fiber modified product and a white coconut fiber modified product.

[0141] A fumigation unit is used to mix the brown coconut fiber modified product and the white coconut fiber modified product and then fumigate them.

[0142] The mixing and refining unit is used to mix the fumigated fiber pulp with additives, then refine and dewater it to obtain pulp.

[0143] The control system is used to control the operation of the raw material processing unit, pretreatment unit, modification unit, fumigation unit, and mixing and grinding unit.

[0144] The pretreatment unit includes an alkaline chemical treatment device, a steam explosion device, an enzymatic hydrolysis device, and a low-temperature extraction device. The alkaline chemical treatment device is used to soak brown coconut fiber powder in an alkaline solution for alkaline chemical treatment. The steam explosion device is used to perform steam explosion treatment. The enzymatic hydrolysis device is used to enzymatically hydrolyze white coconut fiber powder. The low-temperature extraction device is used to perform low-temperature extraction treatment.

[0145] The modified processing unit includes a mixing and dispersing device and a heating device; the mixing and dispersing device and the heating device are used to mix and disperse the brown coconut fiber pretreatment product with epoxy resin and then heat it for crosslinking; the mixing and dispersing device and the heating device are also used to mix and disperse the white coconut fiber pretreatment product with titanium dioxide and then place it in a polyvinyl alcohol aqueous solution and heat it.

[0146] The fumigation unit includes a fumigation tank for fumigating the mixed products.

[0147] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A pulping method for making paper from coconut shells, characterized in that, include: Coconut fiber powder from mature coconuts and immature coconuts was obtained separately, wherein the coconut fiber powder from mature coconuts was brown and the coconut fiber powder from immature coconuts was white. The lignin in the brown coconut fiber powder and the white coconut fiber powder were removed respectively to obtain brown coconut fiber pretreated product and white coconut fiber pretreated product. The brown coconut fiber pretreated product and the white coconut fiber pretreated product were modified to obtain the brown coconut fiber modified product and the white coconut fiber modified product, respectively. The brown coconut fiber modified product and the white coconut fiber modified product are mixed and then fumigated at 120-150℃ to obtain fiber pulp; the fiber pulp is mixed with additives and then milled and dewatered to obtain paper pulp. The process of removing lignin from the brown coconut fiber powder and the white coconut fiber powder respectively to obtain the brown coconut fiber pretreated product and the white coconut fiber pretreated product includes: The brown coconut fiber powder is soaked in an alkaline solution for alkaline chemical treatment and then subjected to steam explosion treatment to obtain the brown coconut pretreated product; wherein, the steam explosion treatment step includes heating the alkaline chemically treated brown coconut fiber powder to 180-220°C in a sealed container, applying high-pressure steam, maintaining the high pressure for 1-2 minutes, and then releasing the pressure. The white coconut fiber powder was enzymatically hydrolyzed and then extracted at low temperature to obtain the pretreated white coconut fiber product. The brown coconut fiber pretreated product and epoxy resin are mixed and dispersed, and then crosslinked by heating at 60-80℃ for at least 2 hours to obtain the brown coconut fiber modified product. The white coconut fiber pretreated product and titanium dioxide were mixed and dispersed, and then placed in a polyvinyl alcohol aqueous solution and heated for at least 1 hour to obtain the white coconut fiber modified product. When the modified brown coconut fiber product and the modified white coconut fiber product are mixed and fumigated at 120-150℃, the fumigation liquid is a mixture of coconut water and rice vinegar.

2. The method for pulping coconut shells for papermaking according to claim 1, characterized in that, The additives are polyvinyl alcohol, cellulose ether, fluoride additives and talc.

3. A type of pulp, characterized in that, The pulp is prepared by the pulping method for coconut shell papermaking as described in any one of claims 1-2.

4. The use of the pulp of claim 3 in papermaking.

5. A pulping apparatus for coconut shell papermaking, used to implement the pulping method for coconut shell papermaking as described in any one of claims 1-2, characterized in that, include: The raw material processing unit is used to crush the coconut shreds of mature and immature coconuts to obtain brown coconut fiber powder and white coconut fiber powder. A pretreatment unit is used to remove lignin from the brown coconut fiber powder and the white coconut fiber powder respectively, to obtain brown coconut fiber pretreatment product and white coconut fiber pretreatment product; The pretreatment unit pretreats brown coconut fiber powder and white coconut fiber powder to obtain brown coconut fiber pretreated product and white coconut fiber pretreated product. A modification processing unit is used to modify the brown coconut fiber pretreatment product and the white coconut fiber pretreatment product respectively to obtain a brown coconut fiber modified product and a white coconut fiber modified product. A fumigation unit is used to mix the brown coconut fiber modified product and the white coconut fiber modified product and then fumigate them. The mixing and refining unit is used to mix the fumigated fiber pulp with additives, then refine and dewater it to obtain pulp.

6. The pulping equipment for coconut shell papermaking according to claim 5, characterized in that, The pretreatment unit includes an alkaline chemical treatment device, a steam explosion device, an enzymatic hydrolysis device, and a low-temperature extraction device; the alkaline chemical treatment device is used to soak brown coconut fiber powder in an alkaline solution for alkaline chemical treatment; the steam explosion device is used to perform steam explosion treatment; the enzymatic hydrolysis device is used to enzymatically hydrolyze white coconut fiber powder; and the low-temperature extraction device is used to perform low-temperature extraction treatment. The modified processing unit includes a mixing and dispersing device and a heating device; the mixing and dispersing device and the heating device are used to mix and disperse the brown coconut fiber pretreatment product with epoxy resin and then heat it for crosslinking; the mixing and dispersing device and the heating device are also used to mix and disperse the white coconut fiber pretreatment product with titanium dioxide and then place it in a polyvinyl alcohol aqueous solution and heat it. The fumigation unit includes a fumigation tank for fumigating the mixed products.

7. The pulping equipment for coconut shell papermaking according to claim 5, characterized in that, The coconut shell papermaking pulping equipment also includes a control system; The control system is used to control the operation of the raw material processing unit, pretreatment unit, modification unit, fumigation unit, and mixing and grinding unit.

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