Method and system for comprehensive utilization of fibers

Abstract

The method of the embodiment of the present application mixes the first white water generated in the process of preparing non-woven fabric and the second white water generated in the process of preparing household paper through the recycling unit to form mixed white water, filters the mixed white water to form recycled fibers, uses the recycled fibers to the pretreatment or papermaking process again, and applies the clear white water to the papermaking process. On the one hand, the fibers consumed in the production of non-woven fabric can be directly utilized, and at the same time, the fibers in the production of household paper can also be utilized. On the other hand, compared with the multiple filtering and impurity removing system used in the recycling of white water generated in the traditional non-woven fabric 27 preparation process to prevent problems such as blockage, explosion and water needle blockage of the high-pressure system, the clear white water used for the dispersion of pulp does not need to be treated too much, the cost is greatly reduced, it is safe and has high utilization rate. On the third hand, the water consumption and energy consumption of the whole system can be reduced.

Description

Technical Field

[0001] This invention relates to a method and system for the comprehensive utilization of fibers. Background Technology

[0002] With rapid economic development and increasing pursuit of quality of life, non-woven fabric products (face towels, makeup remover wipes, cotton wipes, etc.) have become an indispensable part of daily life in recent years. Non-woven fabrics have advantages such as a wide range of raw material sources, diverse varieties, and a soft, fluffy feel. As consumers' environmental awareness grows, non-woven fabrics are gradually developing towards a green and environmentally friendly direction.

[0003] To this end, the North American Nonwovens Industry Association (INDA) and the European Nonwovens Association (EDANA) jointly developed the "Washable Guide" in 2008, which defined "washable". Before and after this, the industry has developed a variety of washable nonwoven products and technologies, and washable technologies and products have developed rapidly in recent years.

[0004] Typically, washable products are made by web-laying and hydroentangling viscose fibers and natural fibers, as shown in documents such as CN105463703A Washable and biodegradable mixed fiber hydroentangled nonwoven fabric and its preparation method, and CN113718548A A method for preparing washable nonwoven fabric and washable nonwoven fabric. However, in practice, it has been found that the existing methods result in significant fiber raw material loss.

[0005] In addition, numerous research papers in the industry, such as "Problems and Development Directions of Rupture Wipes" published in the November 2019 issue of "Household Paper" and patent document US5384189A, Water-decomposable non-woven fabric, all suggest that the fiber length used in rinseable products should be as long as possible, preferably not shorter than 5mm, and ideally between 5-20mm. On the one hand, this ensures that if the fiber raw materials are recycled, the use of recycled fibers will have a significant impact on the performance of rinseable products. On the other hand, other fiber raw materials, such as bamboo pulp fiber, are usually difficult to apply to rinseable products due to their shorter average fiber length. Furthermore, if they are screened for application, it is difficult to utilize all the fiber raw materials.

[0006] Therefore, a new technical solution is needed to address the aforementioned technical problems. Summary of the Invention

[0007] Therefore, the present invention provides a method for comprehensive utilization of fibers to solve the above-mentioned technical problems.

[0008] A method for comprehensive utilization of fibers, comprising:

[0009] S1: Provide a first fiber and a second fiber, and pre-treat the first fiber through a pre-treatment unit. The pre-treatment includes pulping the first fiber to form a fiber suspension, screening at least a portion of the fiber suspension, and obtaining unscreened fiber pulp, a first long fiber pulp and a short fiber pulp, or a second long fiber pulp, a first long fiber pulp and a short fiber pulp. The first fiber is a natural fiber, and the second fiber raw material is a regenerated fiber or viscose fiber.

[0010] S2: Nonwoven fabric is prepared by combining unscreened fiber pulp or second long fiber pulp with second fiber using a nonwoven fabric preparation unit, and tissue paper is prepared by combining first long fiber pulp with short fiber pulp using a paper sheet making unit. In the process of preparing nonwoven fabric by combining unscreened fiber pulp or second long fiber pulp with second fiber, first white water is formed, and second white water is formed in the process of preparing tissue paper by combining first long fiber pulp with short fiber pulp.

[0011] S3: The first white water and the second white water are collected to form mixed white water. The mixed white water is filtered to form recycled fibers and clear white water. The clear white water is sent back to the pretreatment unit or the paper making unit, and the recycled fibers are sent back to the paper making unit.

[0012] The purified water is only returned to the pretreatment unit or the paper making unit, and not to the nonwoven fabric preparation unit.

[0013] The nonwoven fabric is a washable nonwoven fabric, the first fiber is bamboo pulp, a portion of the fiber suspension is sieved to form short fiber pulp and a first long fiber pulp, and the other portion of the fiber suspension is not sieved and forms unsieved fiber pulp.

[0014] The average fiber length in the unscreened fiber slurry is greater than 1.7 mm.

[0015] In step S3, the recycled fibers are subjected to secondary screening to obtain a third long fiber with a fiber length greater than 8 mm, and the third long fiber is sent back to the nonwoven fabric preparation unit.

[0016] The pretreatment unit includes a pulper and a screening device. The pulper includes a pulp tank, and the white water is returned to the pulp tank. The papermaking unit includes a short fiber tank and a mixing tank for mixing the first long fiber pulp and the short fiber pulp. The recycled fiber is returned to the short fiber tank or the mixing tank.

[0017] The fiber suspension is subjected to screening to form a first long fiber slurry, a second long fiber slurry, and a short fiber slurry. The average fiber length in the second long fiber slurry is greater than the average fiber length in the first long fiber slurry.

[0018] The first fiber is bamboo pulp, the average fiber length in the second long fiber pulp is greater than 2.5 mm, the average fiber length in the first long fiber pulp is 1-2.5 mm, and the average fiber length in the short fiber pulp is less than 1 mm.

[0019] The fine fiber content in the purified water is less than or equal to 5%, and the fine fiber refers to fiber with a length of less than 0.3 mm.

[0020] A fiber comprehensive utilization system includes a pretreatment unit, a nonwoven fabric preparation unit, a papermaking unit, and a recycling unit.

[0021] A pretreatment unit is configured to pretreat a first fiber, the pretreatment including pulping the first fiber to form a fiber suspension, screening at least a portion of the fiber suspension, and obtaining unscreened fiber pulp, a first long fiber pulp and a short fiber pulp, or a second long fiber pulp, a first long fiber pulp and a short fiber pulp.

[0022] The nonwoven fabric preparation unit is configured to prepare a nonwoven fabric by combining unscreened fiber slurry or a second long fiber slurry with a second fiber, and to form a first white water during the preparation process.

[0023] The papermaking unit is configured to prepare tissue paper from the first long-fiber pulp and the short-fiber pulp, and to form the second white water during the preparation process;

[0024] The recycling unit includes a white water tank that collects the first white water and the second white water to form mixed white water, a filter device that filters the mixed white water to form recycled fibers and clear white water, and is configured to send the clear white water back to the pretreatment unit or the papermaking unit, and to send the recycled fibers back to the papermaking unit.

[0025] Beneficial effects: This embodiment uses a recycling unit to mix the first white water generated during the preparation of nonwoven fabric and the second white water generated during the preparation of tissue paper to form mixed white water. The mixed white water is then filtered to form recycled fibers, which are reused in the pretreatment or papermaking process. The white water is also applied to the papermaking process. On the one hand, the fibers consumed during the production of nonwoven fabric can be directly utilized, and the fibers in the production of tissue paper can also be utilized. On the other hand, compared with the traditional method of recycling white water generated during the preparation of nonwoven fabric 27, which requires the use of multiple filtration and impurity removal systems to prevent problems such as high-pressure system blockage, bursting, and water needle blockage, the white water used for pulping does not require much treatment, which greatly reduces costs, is safe, and has a high utilization rate. On the other hand, it can reduce the water consumption and energy consumption of the entire system. Attached Figure Description

[0026] Figure 1A schematic diagram of the fiber comprehensive utilization method according to the first embodiment of the present invention;

[0027] Figure 2 A detailed schematic diagram of the fiber comprehensive utilization method according to the first embodiment of the present invention;

[0028] Figure 3 application Figure 2 System structure diagram of fiber comprehensive utilization method;

[0029] Figure 4 A schematic diagram of the fiber comprehensive utilization method according to the second embodiment of the present invention.

[0030] Component descriptions in the diagram:

[0031] Pretreatment unit 10; First fiber 11; Pulping machine 12; Screening device 13; Nonwoven fabric preparation unit 20; Second fiber 21; Unscreened fiber pulp 22; First pulp mixing line 23; Forming device 24; Hydroentangling reinforcement device 25; Drying device 26; Nonwoven fabric 27; Paper making unit 30; Short fiber pulp 31; First long fiber pulp 32; Refining machine 33; Second pulp mixing line 34; Paper machine 35; Drying cylinder 36; Tissue paper 37; Recycling unit 40; First white water tank 41; Second white water tank 42; White water pool 44; Filtering device 43; Recycled fiber 431; Clean water 432. Detailed Implementation

[0032] Please refer to the reference. Figure 1 This invention provides a method for comprehensive utilization of fibers, which is used to make full use of fiber raw materials and reduce waste or loss of fiber raw materials. For ease of description, the following description will be combined with the system that applies the method for comprehensive utilization of fibers.

[0033] S1: Provide a first fiber 11 and a second fiber 21. Pre-treat the first fiber 11 through a pre-treatment unit 10. The pre-treatment includes pulping the first fiber 11 to form a fiber suspension, screening at least a portion of the fiber suspension, and obtaining unscreened fiber pulp 22, first long fiber pulp 32 and short fiber pulp 31 or second long fiber pulp, first long fiber pulp 32 and short fiber pulp 31. The first fiber 11 is a natural fiber, and the raw material of the second fiber 21 is regenerated fiber or viscose fiber.

[0034] The natural fibers mentioned herein are specifically natural cellulose fiber raw materials, and more specifically, natural pulp raw materials used in papermaking, such as wood pulp, straw pulp, reed pulp, sugarcane pulp, bamboo pulp, and other papermaking fiber raw materials. In addition, these fiber raw materials are usually made into pulp board form to facilitate transportation, storage, and use by the papermaking system. In some cases, wet pulp, which is commonly referred to in the art, can also be used as a fiber raw material in this system, but when used in this system, the dryness of the wet pulp should be below 50%.

[0035] Please refer to this as well. Figure 2 and Figure 3 ,exist Figure 2 and Figure 3 The process is described in more detail. The first fiber 11 is pretreated by the pretreatment unit 10. The pretreatment unit 10 includes a pulper 12 and a screening device 13. The screening device 13 can selectively screen at least a portion of the fiber suspension to obtain unscreened fiber pulp 22, first long fiber pulp 32 and short fiber pulp 31. The pretreatment unit 10 also includes a short fiber tank for storing short fiber pulp 31.

[0036] It is understandable that the short fiber slurry 31 mainly contains short fibers, and the first long fiber slurry 32 mainly contains long fibers. The term "mainly" means that the proportion of fibers of a predetermined length in the slurry is greater than 80%. For example, the proportion of short fibers in the short fiber slurry 31 is greater than 80%, while the proportion of long fibers in the long fiber slurry is greater than 80%.

[0037] Specifically, the pulper 12 is used to disperse natural fiber raw materials in water through mechanical action to form a fiber suspension. More specifically, the pulper 12 is a hydraulic pulper.

[0038] Specifically, the screening device 13 is used to form a fiber suspension containing fibers of different lengths by screening the fiber suspension. In a specific embodiment, a screening device as shown in CN113622212A can be selected, which will not be described in detail here.

[0039] Understandably, the fiber suspension forms short fiber slurry 31 and first long fiber slurry 32 after passing through sieving. When the fiber suspension is not processed by the sieving device 13, it forms unscreened fiber slurry 22.

[0040] Furthermore, the short fibers refer to fibers with an average length of less than or equal to 1 mm, and the long fibers refer to fibers with an average length of greater than 1 mm.

[0041] Please refer to this as well. Figure 4 ,exist Figure 4The second embodiment illustrates a method for pretreating the fiber suspension, in which the entire fiber suspension passes through a screening device and is screened to form a first long fiber slurry, a second long fiber slurry, and a short fiber slurry.

[0042] Furthermore, the average fiber length in the second long fiber slurry is greater than the average fiber length in the first long fiber slurry.

[0043] Furthermore, when the first fiber is bamboo pulp, the average fiber length in the second long fiber pulp is greater than 2.5 mm, the average fiber length in the first long fiber pulp is 1-2.5 mm, and the average fiber length in the short fiber pulp is less than 1 mm.

[0044] S2: Nonwoven fabric 27 is prepared by using the nonwoven fabric preparation unit 20 with unscreened fiber pulp 22 or second long fiber pulp and second fiber 21, and household paper 37 is prepared by using the first long fiber pulp 32 and short fiber pulp 31 with the paper sheet making unit 30. In the process of preparing nonwoven fabric 27 with unscreened fiber pulp 22 or second long fiber pulp and second fiber 21, first white water is formed, and second white water is formed in the process of preparing household paper 37 with first long fiber pulp 32 and short fiber pulp 31.

[0045] The nonwoven fabric preparation unit 20 is used to process unscreened fiber slurry 22 or second long fiber slurry and second fiber 21 to obtain first white water and nonwoven fabric 27.

[0046] Furthermore, the nonwoven fabric preparation unit 20 includes a first sizing line 23, which is configured to prepare the second fiber 21, the second long fiber sizing or the unscreened fiber sizing 22 to a predetermined concentration, and to form a first mixed sizing by the second fiber 21 and the second long fiber, and the second fiber 21 and the unscreened fiber in a predetermined ratio. Preferably, the concentration of the second fiber 21 is 0.6% to 0.9%; and the concentration of the second long fiber or the unscreened fiber is 2% to 5%.

[0047] In addition, the concentration of the first mixed pulp is 0.03%-2% through the first pulp mixing line 23.

[0048] Furthermore, the nonwoven fabric preparation unit 20 includes a forming device 24 to dehydrate the first mixed slurry to form a first wet fiber web, wherein the forming device 24 can be an inclined web forming device.

[0049] Furthermore, the nonwoven fabric preparation unit 20 includes a hydroentanglement reinforcement device 25. The hydroentanglement reinforcement device 25 transfers the first wet fiber web onto the hydroentangled mesh curtain. Along the running direction of the hydroentangled mesh curtain, multiple hydroentanglement heads spray high-pressure water jets from one side of the hydroentangled mesh curtain, impacting the first wet fiber web and causing the fibers to entangle. The high-pressure water jets passing through the first wet fiber web are bounced back by the drum and impact the wet fiber web again, causing the fibers to entangle again, forming the first substrate.

[0050] Understandably, during the process of forming the first wet fiber web by the molding device 24 and the hydroentangling reinforcement device 25 performing hydroentangling reinforcement on the first wet fiber web, water is filtered out to form the first white water. The first white water is received by the first white water tank 41. The first white water includes a number of fibers. Understandably, the fibers in the first white water include natural fibers and viscose fibers or regenerated fibers.

[0051] The nonwoven fabric preparation unit 20 includes a drying device 26 to dry the first substrate to form a nonwoven fabric 27.

[0052] Preferably, the nonwoven fabric 27 is a washable nonwoven fabric 27.

[0053] The papermaking unit 30 is used to process the first long fiber pulp 32 and the short fiber pulp 31 to obtain the second white water and household paper 37.

[0054] Furthermore, the papermaking unit 30 includes a refiner 33. In this embodiment, the refiner 33 refines only the first long fiber pulp 32. The refiner 33 refines the fibers to make them fibrillated, so that the paper has better performance and can be better formed in the papermaking machine 35.

[0055] A second pulp mixing line 34 is provided after the refiner 33 to form a second mixed pulp by mixing different pulps in a predetermined ratio and then conveying it to the paper machine 35 to produce tissue paper 37 that meets the needs of use. The different pulps may include short fiber pulp 31 of different concentrations and a first long fiber pulp 32.

[0056] The paper machine 35 is used to form paper sheets from the second mixed pulp through processes such as dewatering, forming, and drying via a filter screen. The paper machine 35 includes a wet section and a dry section. The wet section includes a headbox, forming wire, felt, and a second white water tank 42, while the dry section includes a drying cylinder 36 and an air hood. The second mixed pulp is sprayed from the headbox, formed by the forming wire, transferred to the dry section via the felt, and then collected by the second white water tank 42. This second white water consists of water filtered out during the forming process of the wet paper sheet in the wet section and water discharged during the transfer of the wet paper sheet via the felt.

[0057] Understandably, the second white water contains fiber.

[0058] In this embodiment, the paper machine 35 can be of various types, such as a crescent paper machine, a wire forming paper machine, a cylinder paper machine, etc.

[0059] S3: The first white water and the second white water are collected to form mixed white water. The mixed white water is filtered to form recycled fiber 431 and clear white water 432. The clear white water 432 is sent back to the pretreatment unit 10 or the paper making unit 30. The recycled fiber 431 is sent back to the paper making unit 30.

[0060] Specifically, the reuse unit 40 forms mixed white water and filters and transports the mixed white water. That is, the reuse unit 40 includes a white water tank 44, a filtration device 43, and a transport device. The white water tank 44 is used to mix the first white water and the second white water to form mixed white water. The filtration device 43 is configured to filter the mixed white water to form recycled fiber 431 and clear white water 432. The transport device is configured to transport the clear white water 432 and the recycled fiber 431.

[0061] This embodiment uses a recycling unit 40 to mix the first white water generated during the preparation of nonwoven fabric 27 and the second white water generated during the preparation of tissue paper 37 to form mixed white water. The mixed white water is then filtered to form recycled fibers 431. The recycled fibers 431 are reused in the pretreatment or papermaking process, and the purified white water 432 is applied to the papermaking process. On the one hand, the fibers consumed during the production of nonwoven fabric 27 can be directly utilized, and the fibers produced in the production of tissue paper 37 can also be utilized. On the other hand, compared with the traditional method of recycling white water generated during the preparation of nonwoven fabric 27, which requires a multi-stage filtration and impurity removal system to prevent problems such as high-pressure system blockage, bursting, and water needle blockage, the purified white water 432 used for pulping does not require much treatment, which significantly reduces costs, is safe, and has a high utilization rate. On the other hand, it can reduce the water and energy consumption of the entire system.

[0062] Furthermore, the filtration device 43 can be a multi-stage disc filter. Preferably, the fine fiber content in the filtered clear water 432 is less than or equal to 5%, such as 1%, 2%, 3%, 4%, or 5%, which can effectively prevent the fine fibers in the water from clogging the spray pipes or sieve holes. The fine fibers refer to fibers with a fiber length of less than 0.3 mm.

[0063] Furthermore, the pulping machine 12 includes a pulping tank, to which the clear water 432 is returned.

[0064] Furthermore, the papermaking unit 30 includes a short fiber trough and the second pulp distribution line 34 includes a mixing trough, wherein the recycled fiber 431 is fed back to the short fiber trough or the mixing trough.

[0065] Furthermore, the filtration device 43 also includes a secondary grading device, which is configured to screen out a third long fiber with a fiber length greater than 8 mm. It is understood that since the length of natural fibers is usually less than 6 mm, while only regenerated fibers or viscose fibers generally exceed 8 mm, after passing through the secondary grading device, the majority of the third long fiber is regenerated fiber or viscose fiber. The nonwoven fabric preparation unit 20 includes a second fiber trough, and the third long fiber is returned to the second fiber trough.

[0066] In addition, the cleaning water 432 should not be returned to the nonwoven fabric preparation unit 20, that is, the cleaning water 432 should only be returned to the paper preparation unit or the pretreatment unit 10.

[0067] Furthermore, the applicant discovered in the research that when the first fiber 11 is bamboo pulp and the nonwoven fabric 27 is a washable nonwoven fabric 27, because the bamboo fibers in the bamboo pulp are long and thin with thick walls and small cavities, when these fibers become entangled with viscose fibers, on the one hand, the entanglement between the fibers is relatively tight, messy, and has many bonding points; on the other hand, due to their finer shape and smaller wall thickness compared to wood pulp, it is not easy for them to come into contact with the entangled state under the action of water flow. Especially when these fibers are shorter, it is even more difficult to simultaneously meet the requirements of strength and washability when it is necessary to increase the amount of viscose fibers or use longer viscose fibers. Further research found that when there are some short fibers in the long and thin fibers, the short fibers can either occupy the entanglement position or first become entangled with the long and thin fibers before becoming entangled with the viscose fibers, thus reducing the bending shape of these long and thin fibers during entanglement.

[0068] Secondly, the short fibers present are easily detached under the impact of water flow. During the detachment process, the porosity of the nonwoven fabric 27 increases. The increase in porosity further increases the flow velocity and pressure of water at the pores, causing the fibers at the pores to be lost with the water flow, thus disintegrating and dispersing. That is, when the first fiber 11 is bamboo pulp, preferably, at least a portion of the fiber suspension does not pass through the screening device 13 to obtain unscreened fiber pulp 22. When the unscreened fiber pulp 22 and the second fiber 21 are used to prepare the washable nonwoven fabric 27, it is easier to achieve a match between washability and performance.

[0069] Furthermore, the average fiber length in the unscreened fiber slurry 22 is greater than 1.7 mm.

[0070] The present invention also provides a fiber comprehensive utilization system, including a pretreatment unit 10, a nonwoven fabric preparation unit 20, a paper making unit 30, and a recycling unit 40. The pretreatment unit 10, the nonwoven fabric preparation unit 20, the paper making unit 30, and the recycling unit 40 have been described in detail above and will not be repeated here.

[0071] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A fiber comprehensive utilization method, characterized by, The application relates to a fiber comprehensive utilization system. S1: providing first fibers and second fibers, pre-treating the first fibers through a pre-treating unit, the pre-treating including dispersing the first fibers to form a fiber suspension, and screening at least part of the fiber suspension to obtain an un-screened fiber pulp, a first long fiber pulp and a short fiber pulp or a second long fiber pulp, the first fibers being natural fibers, and the second fiber material being regenerated fibers or viscose fibers; S2: using a non-woven fabric preparation unit to prepare non-woven fabric from the un-screened fiber pulp or the second long fiber pulp and the second fibers, and using a paper sheet making unit to prepare household paper from the first long fiber pulp and the short fiber pulp, wherein first white water is formed in the process of preparing the non-woven fabric from the un-screened fiber pulp or the second long fiber pulp and the second fibers, and second white water is formed in the process of preparing the household paper from the first long fiber pulp and the short fiber pulp; S3: collecting the first white water and the second white water to form mixed white water, filtering the mixed white water to form recycled fibers and clear white water, and returning the clear white water to the pre-treating unit or the paper sheet making unit, and returning the recycled fibers to the paper sheet making unit.

2. The fiber comprehensive utilization method according to claim 1, characterized by, The clear white water is only returned to the pre-treating unit or the paper sheet making unit, and is not returned to the non-woven fabric preparation unit.

3. The fiber comprehensive utilization method according to claim 1, characterized by, The non-woven fabric is a flushable non-woven fabric, the first fibers are bamboo pulp, part of the fiber suspension is screened to form the short fiber pulp and the first long fiber pulp, and another part of the fiber suspension is not screened to form the un-screened fiber pulp.

4. The fiber comprehensive utilization method according to claim 3, characterized by, The average length of the fibers in the un-screened fiber pulp is greater than 1.7 mm.

5. The fiber comprehensive utilization method according to claim 1, characterized by, In step S3, the recycled fibers are subjected to secondary screening treatment, and third long fibers with a length greater than 8 mm are obtained, which are returned to the non-woven fabric preparation unit.

6. The fiber comprehensive utilization method according to claim 1, characterized by, The pre-treating unit comprises a dispersing machine and a screening device, the dispersing machine comprises a dispersing tank, the clear white water is returned to the dispersing tank, the paper sheet making unit comprises a short fiber tank and a mixing tank for mixing the first long fiber pulp and the short fiber pulp, and the recycled fibers are returned to the short fiber tank or the mixing tank.

7. The fiber comprehensive utilization method according to claim 1, characterized by, The fiber suspension is subjected to screening treatment to form the first long fiber pulp, the second long fiber pulp and the short fiber pulp, and the average length of the fibers in the second long fiber pulp is greater than the average length of the fibers in the first long fiber pulp.

8. The fiber comprehensive utilization method according to claim 7, characterized by, The first fibers are bamboo pulp, the average length of the fibers in the second long fiber pulp is greater than 2.5 mm, the average length of the fibers in the first long fiber pulp is 1-2.5 mm, and the average length of the fibers in the short fiber pulp is less than 1 mm.

9. The fiber comprehensive utilization method according to claim 1, characterized by, The content of fine fibers in the clear white water is less than or equal to 5%, and the fine fibers refer to fibers with a length less than 0.3 mm.

10. A fiber comprehensive utilization system using the fiber comprehensive utilization method according to claim 1, characterized by The fiber comprehensive utilization system comprises a pre-treating unit, a non-woven fabric preparation unit, a paper sheet making unit and a recycling unit. a pre-treatment unit configured to pre-treat the first fibers, the pre-treatment including forming a fiber suspension from the bulked first fibers, and screening at least a portion of the fiber suspension to obtain an unscreened fiber slurry, a first long fiber slurry, and a short fiber slurry or a second long fiber slurry, the first long fiber slurry, and the short fiber slurry; a nonwoven fabric production unit configured to produce a nonwoven fabric from the unscreened fiber slurry or the second long fiber slurry and the second fibers, and to form a first white water during the production; a sheet production unit configured to produce a tissue paper from the first long fiber slurry and the short fiber slurry, and to form a second white water during the production; the recycling unit including a white water tank configured to collect the first white water and the second white water to form a mixed white water, a filtration device configured to filter the mixed white water to form recycled fibers and a clear white water, and a recycling device configured to recycle the clear white water to the pre-treatment unit or the sheet production unit, and to recycle the recycled fibers to the sheet production unit.

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