Biological degumming method and system for long fibrilia for spinning

Abstract

The invention discloses a biological degumming method and system for long fibrilia for spinning. The method comprises the following steps: pretreatment, first biological degumming treatment, second biological degumming treatment, third biological degumming treatment, cleaning, spin-drying, airing and the like. Wherein the bath ratio of the biological degumming solution is 1: 24. A new degumming solution is sequentially injected for three times to be mixed with a biological refining agent for degumming treatment, so that colloid can be more sufficiently removed, and cellulose is prevented from being damaged by a chemical reagent. And secondly, the bath ratio is controlled to be 1: 24, so that the effect of the biological refining agent and the degumming solution can be ensured, and reasonable utilization of resources is realized while the degumming quality is ensured. Finally, by arranging a degumming waste liquid collecting box and a cleaning waste liquid collecting box, degumming waste liquid and cleaning waste liquid are collected in a classified mode, waste liquid recycling is facilitated, and pollution to the environment is reduced.

Description

Technical Field

[0001] This invention relates to the technical field of hemp fiber degumming, and particularly to a biological degumming method and system for long hemp fibers used in textiles. Background Technology

[0002] The phloem of bast fibers (such as flax and ramie) contains a large amount of non-cellulose substances, including lignin, pectin, and hemicellulose. These substances intertwine with cellulose to form a complex structure, which must be removed through degumming to extract usable fibers, which can then be used in the textile industry. Therefore, degumming is a core step in fiber processing, directly affecting fiber quality and industrial efficiency. However, current technologies have significant shortcomings, hindering the sustainable development of the industry. Currently, bast fiber degumming mainly uses chemical and biological methods.

[0003] However, although chemical degumming is a mature and widely used process, it still has some drawbacks. For example, the chemical treatment cycle is relatively long, usually requiring long periods of alkaline boiling and acid soaking, resulting in low degumming efficiency. Specifically, during the acid soaking process, it generally takes 12 hours to complete one acid soaking cycle. If there are multiple alkaline boiling cycles or multiple acid soaking cycles in the chemical degumming process of a certain bast fiber crop, then a complete chemical degumming process for bast fiber crops may require more than a day of degumming treatment time. Therefore, chemical degumming methods with low degumming efficiency cannot meet the current requirements of industrial efficiency. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a biological degumming method for long bast fibers used in textiles, which can rapidly degumme bast crops at low temperatures using biological methods, thus shortening the degumming time.

[0005] The present invention also proposes a biological degumming system for textile long flax fibers using the above-mentioned biological degumming method.

[0006] According to a first aspect of the present invention, a biological degumming method for textile long flax fibers includes the following steps: The long flax fibers are bundled together, and then the bundled long flax fibers are placed into the feed trough of an industrial washing machine. Inject a degumming solution into an industrial washing machine, then add a bio-refining agent for degumming. Heat the bio-degumming solution formed by mixing the degumming solution and the bio-refining agent to 50°C to 55°C. After running the industrial washing machine for fifty minutes, discharge the degumming waste liquid generated in the industrial washing machine. The degumming solution is injected into the industrial washing machine for the second time, followed by the addition of the bio-refining agent. The degumming solution and the bio-refining agent are then mixed to form a bio-degumming solution, which is heated to 50°C to 55°C. After the industrial washing machine has been running for 50 minutes, the degumming waste liquid generated in the industrial washing machine is discharged. The degumming solution is injected into the industrial washing machine for the third time, followed by the addition of the bio-refining agent. The degumming solution and the bio-refining agent are then mixed to form a bio-degumming solution, which is heated to 50°C to 55°C. After the industrial washing machine has been running for 50 minutes, the degumming waste liquid generated in the industrial washing machine is discharged. Inject cleaning solution into the industrial washing machine, run the machine for 20 minutes, and then discharge the generated cleaning waste liquid. After removing the long flax fiber roll from the industrial washing machine, place it into the spin dryer and run the spin dryer for 30 minutes. Then, remove the long flax fiber roll from the spin dryer and hang it on a rack to air dry. The bath ratio of the biological degumming solution formed each time was 1:24.

[0007] The biological degumming method for textile long flax fibers according to a first aspect of the present invention has at least the following beneficial effects: First, the long flax fibers are bundled into rolls and placed into the feed tank of an industrial washing machine. New degumming solution and a bio-refining agent are injected sequentially in three stages for degumming treatment. The degumming waste liquid is recovered after each degumming process. This staged, multi-stage degumming method can more thoroughly and uniformly remove the gum from the long flax fibers. Compared to traditional chemical degumming methods, this biological method allows for rapid, low-temperature degumming of flax crops, avoiding the long cycle problem of chemical degumming and shortening the degumming time. Furthermore, it avoids the problem of chemical reagents easily damaging cellulose and affecting the subsequent processing quality and performance of the long flax fibers, effectively improving the degumming effect and resulting in purer, softer long flax fibers with better preservation of fiber strength and toughness. Secondly, the liquor ratio of the bio-degumming solution is consistently controlled at 1:24. This precise ratio ensures that the bio-refining agent and degumming solution work effectively at the appropriate concentration. It avoids both excessively high concentrations leading to waste of the bio-refining agent and increased production costs, and insufficient concentrations resulting in incomplete degumming. This ensures degumming quality while achieving rational resource utilization and reducing production costs. Furthermore, the use of an industrial washing machine for degumming operations mechanizes and automates the process, significantly improving production efficiency, reducing the tediousness and errors of manual operation, and lowering labor intensity. Finally, by setting up separate collection tanks for degumming and washing waste liquids, the waste liquids are collected separately, facilitating subsequent treatment and recycling, and reducing environmental pollution.

[0008] According to some embodiments of the present invention, an industrial washing machine is connected to a degumming waste liquid collection tank. After the degumming waste liquid generated in the industrial washing machine is discharged, the method further includes: discharging the degumming waste liquid into the degumming waste liquid collection tank, then precipitating the recovered degumming waste liquid, recovering the upper layer solution obtained from the precipitation into the degumming waste liquid recovery tank, performing coagulation and filtration treatment on the upper layer solution between the degumming waste liquid recovery tank and the industrial washing machine to obtain a degumming reuse solution, then discharging the degumming reuse solution back into the industrial washing machine, and discharging the lower layer solution obtained from the precipitation into the degumming waste liquid fertilizer tank.

[0009] According to some embodiments of the present invention, the cleaning waste liquid collection tank is connected to the degumming solution tank and the industrial washing machine respectively. The degumming solution tank is used to store the degumming solution. The cleaning solution is injected into the industrial washing machine. After the industrial washing machine runs for 20 minutes, the generated cleaning waste liquid is discharged. The method further includes: discharging the cleaning waste liquid into the cleaning waste liquid collection tank, and then performing a step-by-step filtration treatment on the cleaning waste liquid between the cleaning waste liquid collection tank and the degumming solution tank to obtain a cleaning reuse solution, and then discharging the cleaning reuse solution into the degumming solution tank.

[0010] According to some embodiments of the present invention, a degumming solution is injected into an industrial washing machine for the third time, followed by the addition of a bio-refining agent for the third time. The degumming solution and the bio-refining agent are then mixed to form a bio-degumming solution, which is heated to 50°C to 55°C. After the industrial washing machine has been running for fifty minutes, the degumming waste liquid generated in the industrial washing machine is recycled to a degumming waste liquid collection tank. The method further includes injecting a chemical degumming solution into the industrial washing machine to chemically degumm the long flax fiber rolls.

[0011] According to a second aspect of the present invention, a biological degumming system for textile long flax fibers employs the biological degumming method for textile long flax fibers described in any of the embodiments of the first aspect. The biological degumming system for textile long flax fibers includes: The industrial washing machine is equipped with a heating device and a refining agent injection device. The heating device is used to heat the biological degumming solution formed by mixing the degumming solution and the biological refining agent. The refining agent injection device is used to inject the biological refining agent. A degumming solution tank, which is connected to the industrial washing machine, is used to store degumming solution and cleaning solution; The degumming waste liquid collection tank is connected to the industrial washing machine and is used to collect the degumming waste liquid generated by the industrial washing machine. The degumming waste liquid collection tank is connected to the degumming waste liquid recovery tank and the degumming waste liquid fertilizer tank. The degumming waste liquid recovery tank is used to store the upper layer solution obtained by sedimentation, and the degumming waste liquid fertilizer tank is used to store the lower layer solution obtained by sedimentation. The cleaning waste liquid collection tank is connected to the industrial washing machine and is used to collect the cleaning waste liquid generated by the industrial washing machine.

[0012] The biological degumming system for textile long flax fibers according to the second aspect of the present invention has at least the following beneficial effects: the entire biological degumming system for textile long flax fibers achieves efficient biological degumming of long flax fibers and resource utilization of waste liquid through the coordinated work of various components, which not only improves production efficiency and reduces production costs, but also reduces environmental pollution.

[0013] According to some embodiments of the present invention, a negative pressure device is further included, which is connected to the degumming waste liquid recovery tank, the degumming waste liquid collection tank, and the degumming waste liquid fertilizer tank respectively. A first valve is provided between the industrial washing machine and the degumming waste liquid collection tank, a second valve is provided between the degumming waste liquid collection tank and the degumming waste liquid recovery tank, a third valve is provided between the degumming waste liquid recovery tank and the negative pressure device, a fourth valve is provided between the degumming waste liquid collection tank and the degumming waste liquid fertilizer tank, and a sixth valve is provided between the degumming waste liquid fertilizer tank and the negative pressure device.

[0014] According to some embodiments of the present invention, a first filtration device is provided between the degumming waste liquid recovery tank and the industrial washing machine, the first filtration device being used to perform coagulation filtration treatment on the upper solution.

[0015] According to some embodiments of the present invention, the degumming solution tank and the degumming waste liquid recovery tank are respectively connected to the industrial washing machine via a seventh valve.

[0016] According to some embodiments of the present invention, a positive pressure device is further included, which is connected to the industrial washing machine and the degumming waste liquid collection tank respectively. An eighth valve is provided between the positive pressure device and the industrial washing machine. The positive pressure device is connected to the degumming waste liquid collection tank through the first valve. A ninth valve is provided between the industrial washing machine and the cleaning waste liquid collection tank.

[0017] According to some embodiments of the present invention, the cleaning waste liquid collection tank is connected to the degumming solution tank, and a second filtration device is provided between the cleaning waste liquid collection tank and the degumming solution tank. The second filtration device is used for cascade filtration of impurities in the cleaning waste liquid.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the steps of the bio-degumming method for long flax fibers used in textiles according to the first aspect of the present invention; Figure 2 This is a schematic diagram of a bio-degumming system for long flax fibers used in textiles, according to a second aspect of the present invention.

[0020] Figure label: 10 Industrial washing machine; 20 Degumming waste liquid collection tank; 30 Degumming waste liquid recovery tank; 40 Degumming waste liquid fertilizer tank; 50 Negative pressure device; 51 Exhaust end; 60 Positive pressure device; 70 Cleaning waste liquid collection tank; 80 Degumming solution tank; 90 First filter device; 100 Second filter device. First valve 1; Second valve 2; Third valve 3; Fourth valve 4; Fifth valve 5; Sixth valve 6; Seventh valve 7; Eighth valve 8; Ninth valve 9. Detailed Implementation

[0021] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0022] In the description of this invention, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0023] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0024] Reference Figure 1 According to the first aspect of the present invention, a method for biological degumming of textile long flax fibers, Figure 1 The degumming steps of a biological degumming method for textile long flax fibers are shown, including pretreatment, first biological degumming treatment, second biological degumming treatment, third biological degumming treatment, washing step, and spin-drying and drying steps.

[0025] Specifically, the pretreatment steps are as follows: the long flax fibers are bundled together, and then the bundled long flax fibers are placed into the feed tank of the industrial washing machine 10. The first biological degumming treatment steps are as follows: Degumming solution is injected into industrial washing machine 10, then a biological refining agent for degumming is added, and the biological degumming solution formed by mixing the degumming solution and the biological refining agent is heated to 50°C to 55°C. After the industrial washing machine 10 runs for fifty minutes, the degumming waste liquid generated in the industrial washing machine 10 is recycled to the degumming waste liquid collection tank 20, and the degumming solution is stored in the degumming solution tank 80. Second biological degumming treatment step: A new degumming solution is injected into the industrial washing machine 10 for the second time, and then a new bio-refining agent is added for the second time. The new degumming solution and the new bio-refining agent are mixed to form a biological degumming solution, which is then heated to 50°C to 55°C. After the industrial washing machine 10 runs for fifty minutes, the new degumming waste liquid generated in the industrial washing machine 10 is recycled into the degumming waste liquid collection tank 20. The third biological degumming treatment step: A new degumming solution is injected into the industrial washing machine 10 for the third time, and then a new biological refining agent is added for the third time. The new degumming solution and the new biological refining agent are mixed to form a biological degumming solution, which is then heated to 50°C to 55°C. After the industrial washing machine 10 runs for fifty minutes, the new degumming waste liquid generated in the industrial washing machine 10 is recycled into the degumming waste liquid collection tank 20. Cleaning process steps: Inject cleaning solution into industrial washing machine 10, run industrial washing machine 10 for 20 minutes, and discharge the generated cleaning waste liquid into cleaning waste liquid collection tank 70. Spin-drying steps: Take out the long flax fiber roll from the industrial washing machine 10 and put it into the spin dryer. After the spin dryer runs for 30 minutes, take out the long flax fiber roll from the spin dryer and hang it on the rack to dry. The bath ratio of the biological degumming solution formed each time was 1:24.

[0026] Therefore, it is understood that the bio-degumming method for textile long flax fibers according to the first aspect of the present invention has at least the following beneficial effects: First, by bundling the long flax fibers into rolls and placing them into the feed tank of an industrial washing machine, and then injecting new degumming solution and bio-refining agent in three separate stages for degumming treatment, and recycling the degumming waste liquid after each degumming, this staged, multi-stage degumming method can more fully and evenly remove the gum from the long flax fibers. Compared with traditional chemical degumming methods, it avoids the problem of chemical reagents easily damaging cellulose and affecting the subsequent processing quality and performance of long flax fibers, effectively improving the degumming effect of long flax fibers, making the degummed long flax fibers purer and softer, and better preserving fiber strength and toughness. Secondly, the bath ratio of the bio-degumming solution is controlled at 1:24 each time. Precise control of the bath ratio ensures that the bio-refining agent and the degumming solution work effectively at the appropriate concentration ratio. This avoids waste of the bio-refining agent due to excessive concentration, which increases production costs, and insufficient degumming due to excessive concentration. Thus, while ensuring degumming quality, it achieves rational resource utilization and reduces production costs. Furthermore, the use of an industrial washing machine 10 for degumming operations achieves mechanization and automation of the degumming process, greatly improving production efficiency, reducing the tediousness and errors of manual operation, and lowering labor intensity. Finally, by setting up degumming waste liquid collection tank 20 and washing waste liquid collection tank 70, the degumming waste liquid and washing waste liquid are collected separately, facilitating subsequent classified treatment and recycling of the waste liquid, reducing environmental pollution. In addition, this method also emphasizes environmental protection and resource recycling. By setting up degumming waste liquid collection tank 20 and washing waste liquid collection tank 70, the degumming waste liquid and washing waste liquid are collected separately, which facilitates subsequent treatment and recycling of the waste liquid and reduces the pollution of the environment. Moreover, storing the degumming solution in the degumming solution tank 80 allows for reasonable allocation and reuse according to actual conditions, further improving resource utilization and reducing production costs.

[0027] Example 1 Pre-treatment, fiber bundling and placement: Select 60 kg of uniformly textured long hemp fiber for textiles, and divide it into 30 portions using specialized bundling straps (nylon straps or hemp rope). Each portion is neatly bundled into a roll. During bundling, ensure moderate tension to guarantee a tight bond and prevent fiber scattering during subsequent processing, while avoiding over-bundling that could damage the fiber. Carefully place the bundled long hemp fiber rolls into the feed trough of industrial washing machine 10.

[0028] First biological degumming treatment: 400 liters of degumming solution are injected into the industrial washing machine 10. In this embodiment, an aqueous solution is used as the degumming solution. Then, according to the instructions for use of the biological refining agent, 2 kg of a compound biological refining agent containing multiple enzymes such as pectinase and xylanase is added. It should be noted that the specific composition of the compound biological refining agent is not specifically limited, as long as it can decompose the gum in the hemp fiber. Using the heating device built into the industrial washing machine 10, the biological degumming solution formed by mixing the degumming solution and the biological refining agent is heated to 50°C, and the temperature error is strictly controlled within ±1°C. The industrial washing machine 10 is started and runs at a constant speed for fifty minutes. During the operation, the biological degumming solution fully contacts the long hemp fiber, and the enzyme components begin to decompose the gum in the fiber. After the operation is completed, the generated degumming waste liquid is recycled to the pre-prepared degumming waste liquid collection tank 20 through the discharge pipe at the bottom of the industrial washing machine 10. At the same time, the remaining unused degumming solution is stored in a special degumming solution tank 80 for subsequent adjustment or use.

[0029] Second biological degumming treatment: 400 liters of new degumming solution are injected into the industrial washing machine 10 for the second time. 2 kg of new composite bio-refining agent is added for the second time. After the new degumming solution and the new bio-refining agent are mixed evenly, the biological degumming solution is heated to 52°C using a heating device. The industrial washing machine 10 is then started and run for fifty minutes to further remove residual gum from the long flax fibers. After the operation is completed, the new degumming waste liquid is collected in the degumming waste liquid collection tank 20.

[0030] The third biological degumming treatment: 400 liters of new degumming solution and 3 kg of new composite bio-refining agent are injected into the industrial washing machine 10 for the third time. After mixing to form the biological degumming solution, the mixture is heated to 50°C. The industrial washing machine 10 is run for 50 minutes to ensure that the gum in the flax fibers is effectively removed. After the operation, the new degumming waste liquid is recycled into the degumming waste liquid collection tank 20. Throughout the three degumming processes, the bath ratio of the biological degumming solution formed each time is strictly controlled at 1:24 by accurately weighing the amount of degumming solution and bio-refining agent used, as well as the weight of the flax fibers.

[0031] Cleaning process: Inject 300 liters of cleaning solution into the industrial washing machine 10. The cleaning solution should be room temperature clean water. Start the industrial washing machine 10 and run it for twenty minutes to thoroughly rinse the long linen fibers with clean water, removing residual degumming solution and bio-refining agent from the fiber surface. After the operation is completed, discharge the generated cleaning waste liquid into the cleaning waste liquid collection tank 70 through the discharge pipe.

[0032] Spin-drying and air-drying: Remove the long flax fiber roll from the industrial washing machine 10, taking care to avoid damage. Place the removed flax fiber roll into the spin dryer and run it at 800 rpm for 30 minutes to remove most of the moisture from the flax fiber using centrifugal force. After the spin dryer is finished, remove the flax fiber roll from the spin dryer and hang it on a well-ventilated special rack to air dry naturally until the moisture content is approximately 10%, ready for subsequent processing and use.

[0033] In summary, when French flax is degummed using this method, the gum removal rate is between 92% and 98%, the lignin removal rate is higher than 50%, and the strength is maintained at more than 80% of the original strength, making it suitable for direct use in wet spinning in textile processes.

[0034] Example 2 The operation steps of this embodiment are basically the same as those of Embodiment 1, except that: in the first degumming treatment, the biological degumming solution is heated to 55°C; in the second degumming treatment, it is heated to 55°C; and in the third degumming treatment, it is heated to 55°C. The parameters in the remaining steps, such as the degumming solution, running time, bath ratio, and amount of bio-refining agent, are consistent with those in Embodiment 1. By adjusting the composition and temperature of the degumming solution, the influence of different conditions on the degumming effect of flax fibers is further explored. The results show that under the conditions of this embodiment, a good degumming effect can also be achieved, and the various performance indicators of the flax fibers are similar to those of Embodiment 1, indicating that the method of the present invention has good adaptability and stability under different combinations of degumming solution temperatures.

[0035] Example 3 The operating steps in this embodiment are basically the same as those in Embodiment 1, except that the same operating steps are used to degumme Bengal jute. The parameters in the remaining steps, such as the temperature of the degumming solution, the degumming solution itself, the running time, the liquor ratio, and the amount of bio-refining agent, remain consistent with those in Embodiment 1. By adjusting the composition and temperature of the degumming solution, the influence of different conditions on the degumming effect of long bast fibers is further explored. The results show that the glue removal rate of Bengal jute is between 95% and 98%, the lignin removal rate is higher than 50%, and the strength remains above 80% of the original strength, making it suitable for blending. It can be noted that under the conditions of this embodiment, a good degumming effect can also be achieved, and the various performance indicators of Bengal jute are similar to those in Embodiment 1, indicating that the method of the present invention has good adaptability and stability in the degumming treatment of different genera of bast crops, meeting the spinning needs of different genera of bast crops.

[0036] Comparative Example 1 This embodiment operates on essentially the same steps as Embodiment 1, except that the Egyptian flax is degummed using these steps. Parameters in the remaining steps, such as the temperature of the degumming solution, the degumming solution composition, the running time, the liquor ratio, and the amount of bio-refining agent, remain consistent with Embodiment 1. By adjusting the composition and temperature of the degumming solution, the effects of different conditions on the degumming effect of long flax fibers are further explored. The results show that the gum removal rate of Egyptian flax is between 70% and 80%, the lignin removal rate is higher than 50%, and the strength remains above 95% of the original strength, making it suitable for spinning yarns smaller than 18 counts. It can be noted that under the conditions of this embodiment, although a good degumming effect can be achieved, it is not as good as that of Embodiments 1 and 3, while the fiber strength performance indicators are much higher than those of Embodiments 1 and 3. This indicates that the method of the present invention has good adaptability and stability in the degumming treatment of different genera of flax crops, meeting the spinning needs of different genera of flax crops.

[0037] In some embodiments of the present invention, the industrial washing machine 10 is connected to the degumming waste liquid collection tank 20. After the degumming waste liquid generated in the industrial washing machine 10 is discharged, the method further includes: discharging the degumming waste liquid into the degumming waste liquid collection tank 20, then precipitating the recovered degumming waste liquid, recovering the upper layer solution obtained from the precipitation into the degumming waste liquid recovery tank 30, performing coagulation and filtration treatment on the upper layer solution between the degumming waste liquid recovery tank 30 and the industrial washing machine 10 to obtain a degumming reuse solution, then discharging the degumming reuse solution back into the industrial washing machine 10, and discharging the lower layer solution obtained from the precipitation into the degumming waste liquid fertilizer tank 40.

[0038] Since the degumming waste liquid collection tank 20 is connected to the industrial washing machine 10 through a pre-designed and installed pipeline, the degumming waste liquid is collected in the collection tank 20 after the three degumming steps are completed, and then the degumming waste liquid can be subjected to sedimentation treatment. It should be noted that the degumming waste liquid can also be subjected to sedimentation treatment sequentially after each degumming step, without waiting until all three degumming steps are completed. Taking sedimentation after the three degumming steps as an example, the recovered degumming waste liquid is first subjected to sedimentation treatment. The collection tank 20 is placed in a relatively quiet, vibration-free environment to allow it to settle naturally. The sedimentation time depends on the amount of degumming waste liquid and the content of impurities and adhesives (and the sedimentation time for the degumming waste liquid obtained after each degumming step should also be the same). During this process, heavier substances such as impurities and colloids in the degumming waste liquid gradually settle to the bottom of the tank, forming a lower layer solution. Specifically, taking Example 1 above as an example, the lower layer solution obtained from sedimentation accounts for 1 / 3 of the total volume of each degumming waste liquid, and the maximum shall not exceed 1 / 3; while the relatively clear solution containing certain reusable components floats on the upper layer, and this portion of the degumming waste liquid for reuse accounts for 2 / 3 of the total volume. After sedimentation, a specialized extraction device, such as a liquid pump with a filtration function or direct pumping, is used to carefully extract the upper layer solution obtained from sedimentation. The filter screen aperture of the liquid pump should be appropriately selected to prevent larger impurities from being drawn in while ensuring the smooth passage of the upper layer solution. The extracted upper layer solution is recycled back to the degumming waste liquid recovery tank 30 through pipelines. Next, the upper layer solution undergoes coagulation and filtration treatment between the degumming waste liquid recovery tank 30 and the industrial washing machine 10. An appropriate amount of coagulant is added to the recovery tank; in this example, polyferric sulfate is used as the coagulant. After adding the coagulant and coagulant aid, the stirring device in the degumming waste liquid recovery tank 30 is turned on to ensure that the coagulant and coagulant aid are fully mixed and reacted with the upper layer solution, coagulating the tiny suspended particles into larger flocs. After stirring, the solution is allowed to stand again or filtered to separate the flocs from the liquid. The relatively clear liquid obtained after coagulation and filtration is the degumming reuse solution. Then, using a pump or a negative pressure device 50, the degumming reuse solution is discharged back into the industrial washing machine 10 through a pipe connected to the industrial washing machine 10. The discharged degumming reuse solution can be reused in subsequent degumming processes, realizing resource recycling and reducing production costs.

[0039] The lower layer solution obtained from precipitation contains abundant nutrients such as polysaccharides or biological proteins, as well as a large amount of organic matter, and has high fertilizer value. The lower layer solution is discharged into a pre-prepared degumming waste liquid fertilizer tank 40 through a dedicated discharge pipe. The lower layer solution discharged into the degumming waste liquid fertilizer tank 40 can be further fermented. An appropriate amount of microbial inoculant is added to the fertilizer tank, stirred evenly, and then the tank is sealed. After fermentation, the resulting liquid fertilizer can be used for agricultural planting, providing nutrients for crops, realizing the resource utilization of waste, and reducing environmental pollution.

[0040] In some embodiments of the present invention, the cleaning waste liquid collection tank 70 is connected to both the degumming solution tank 80 and the industrial washing machine 10. The degumming solution tank 80 is used to store the degumming solution. After the industrial washing machine 10 is injected with cleaning solution and runs for twenty minutes, the generated cleaning waste liquid is discharged. The method further includes: discharging the cleaning waste liquid into the cleaning waste liquid collection tank 70, then performing a step-by-step filtration treatment between the cleaning waste liquid collection tank 70 and the degumming solution tank 80 to obtain a recycled cleaning solution, and then discharging the recycled cleaning solution back into the degumming solution tank 80. Since the cleaning waste liquid collection tank 70 and the industrial washing machine 10 are connected through a pre-installed corrosion-resistant pipe, after cleaning is completed and the cleaning waste liquid is discharged into the cleaning waste liquid collection tank 70, sand filtration, carbon filtration, and fine filtration treatments can begin on the cleaning waste liquid.

[0041] Specifically, a cleaning wastewater collection tank 70 is positioned between the degumming solution tank 80 and the industrial washing machine 10. The cleaning wastewater collection tank 70 is connected to both the degumming solution tank 80 and the industrial washing machine 10, and the cleaning wastewater undergoes a cascade filtration process between the collection tank and the degumming solution tank 80. The first stage of cascade filtration involves installing a coarse filter at the outlet of the cleaning wastewater collection tank 70. This coarse filter uses sand filtration, employing quartz sand or anthracite as filter media, to remove larger suspended solids through deep filtration. A pump connected to the cleaning wastewater collection tank 70 is activated, pumping the cleaning wastewater into the coarse filter at a certain flow rate. During this process, larger solid impurities in the cleaning wastewater, such as fiber fragments and suspended solids, are intercepted, while the pre-filtered cleaning wastewater continues to flow downwards. Next, the second stage of filtration occurs. The cleaning wastewater after the first stage of coarse filtration is introduced into an intermediate filtration tank, where an activated carbon layer is installed. The cleaning wastewater flows in from the top of the filtration tank and passes through the activated carbon layer. The activated carbon layer adsorbs organic matter, odors, and some pigments in the cleaning wastewater, resulting in finer filtration. After the second stage of filtration, the cleaning wastewater exhibits significantly improved transparency and a substantial reduction in impurities. Then, a third stage of filtration is performed. The second-stage filtered cleaning wastewater is piped to a precision filter using a polypropylene fiber filter element, which offers higher precision. Under pressure, the cleaning wastewater passes through the filter element, further removing tiny particles and impurities to obtain a relatively pure cleaning reuse solution. Finally, the obtained cleaning reuse solution is discharged back into the degumming solution tank 80 through a pipe connected to the degumming solution tank 80. Simultaneously, based on the composition and concentration of the original solution in the degumming solution tank 80, the cleaning reuse solution can be appropriately adjusted, for example, by adding a certain amount of chemical agents such as sodium hydroxide, to adjust the pH and component ratio of the solution to meet the requirements of subsequent degumming treatment. This tiered filtration method not only enables the reuse of cleaning wastewater, saving water resources, but also reduces the pollution caused by wastewater discharge to the environment, while lowering production costs and improving the economic and environmental benefits of the entire degumming process.

[0042] It is important to emphasize that, as shown in the above embodiments, this embodiment separates and collects degumming wastewater (containing a large amount of high-concentration colloids and high content of refining agents) and washing wastewater (low-concentration impurities), and adopts differentiated treatment processes of "coagulation sedimentation + membrane filtration" and "sand filtration + carbon filtration + precision filtration" respectively. Through water quality classification, tiered reuse is achieved, breaking through the traditional single treatment mode and solving the problems of high treatment costs for high-concentration wastewater and low reuse rates for low-concentration wastewater.

[0043] In some embodiments of the present invention, a degumming solution is injected into the industrial washing machine 10 for the third time, followed by the addition of a bio-refining agent for the third time. The degumming solution and the bio-refining agent are then mixed to form a bio-degumming solution, which is heated to 50°C to 55°C. After the industrial washing machine 10 has been running for fifty minutes, the degumming waste liquid generated in the industrial washing machine 10 is recycled into the degumming waste liquid collection tank 20. The method further includes injecting a chemical degumming solution into the industrial washing machine 10 to chemically degumm the long flax fiber rolls.

[0044] After the biological degumming treatment is completed and the flax fiber rolls are removed from the biological degumming solution, some impurities and incompletely removed gum may still remain on the flax fibers. At this point, the cleaned flax fiber rolls are placed back into the industrial washing machine 10, ensuring even distribution to prevent tangling or excessive accumulation, thus guaranteeing the effectiveness of subsequent acid immersion or weak alkali treatment. Next, a low-concentration chemical degumming solution is injected into the industrial washing machine 10. Specifically, in this embodiment, a dilute sulfuric acid solution is used, with its concentration precisely adjusted according to the type of flax fiber, the effectiveness of biological degumming, and actual production needs. When injecting the dilute sulfuric acid solution, a metering pump is used to precisely control the injection volume, ensuring that the solution completely submerges the flax fiber rolls based on the volume of the industrial washing machine 10 and the weight of the flax fiber rolls, while maintaining an appropriate solution volume to avoid waste from excessive amounts or negative impacts on the acid immersion effect from insufficient amounts. After injection, the stirring device of the industrial washing machine 10 is activated for stirring. The purpose of stirring is to ensure sufficient contact between the dilute sulfuric acid solution and the flax fibers, accelerating the acid leaching reaction. The leaching time is determined based on factors such as the concentration of the dilute sulfuric acid solution and the difficulty of degumming the flax fibers, generally controlled between 30-60 minutes. During the acid leaching process, the reaction within the industrial washing machine 10 should be closely monitored; the progress of the reaction can be judged by observing changes in the solution's color and the generation of bubbles. The dilute sulfuric acid will chemically react with the residual gum on the flax fibers, decomposing it into water-soluble substances, thereby achieving further degumming.

[0045] After the acid leaching treatment, the stirring device of the industrial washing machine 10 is stopped, and the acid leaching solution is discharged into the acid leaching waste collection container through a dedicated discharge pipe for subsequent environmental protection treatment. After discharge, the flax fiber rolls are washed multiple times with clean water according to the cleaning process to thoroughly remove residual dilute sulfuric acid and reaction products from the flax fibers, ensuring that the pH of the flax fibers meets the requirements for subsequent processing. By adding a chemical degumming solution acid leaching treatment step after the final biological degumming treatment, the degumming effect of the flax fibers can be effectively improved, further enhancing the quality and spinnability of the flax fibers. Furthermore, the combination of biological and chemical degumming is more conducive to the degumming of flax fibers.

[0046] Example 4 This embodiment operates on essentially the same steps as Embodiment 1, except that an acid soaking treatment (or a weak alkali treatment) is added after the third biological degumming treatment. The parameters in the remaining steps, such as the temperature of the degumming solution, the degumming solution itself, the running time, the liquor ratio, and the dosage of the bio-refining agent, remain consistent with Embodiment 1. This adjustment to the degumming process further explores the impact of different conditions on the degumming effect of flax fibers. The results show that after one acid soaking, the gum removal rate of French flax is between 95% and 98%, the lignin removal rate increases to 90%, and the strength remains at approximately 60% of its original strength. It is understandable that after one acid soaking, the fiber strength of French flax decreases due to the erosion of chemical reagents, but it can still be used in other spinning processes.

[0047] Similarly, it should be emphasized that after three biological degumming treatments, depending on the specific hemp crop, a further biological degumming treatment may be optionally performed. As follows: Example 5 This embodiment operates on essentially the same steps as Comparative Example 1, except that an additional biological degumming treatment is performed after the third biological degumming treatment. The parameters in the additional biological degumming treatment, such as the temperature of the degumming solution, the degumming solution itself, the running time, the liquor ratio, and the amount of biorefining agent, remain consistent with those in Example 1. This adjustment to the degumming treatment steps further explores the impact of different conditions on the degumming effect of flax fibers. The results show that after this second biological degumming treatment, the gum removal rate of Egyptian flax increases from 70%-80% to 90%-95%, the lignin removal rate increases from 50% to 70%, and the strength decreases from 95% to approximately 80%. This improves the suitability for spinning yarns smaller than 18 counts to yarns smaller than 36 counts, giving Egyptian flax greater utilization value in this embodiment.

[0048] Reference Figure 2According to a second aspect embodiment of the present invention, the biological degumming system for textile long flax fibers adopts the biological degumming method for textile long flax fibers described in some embodiments of the first aspect. The biological degumming system for textile long flax fibers includes: an industrial washing machine 10, a degumming solution tank 80, a degumming waste liquid collection tank 20, and a washing waste liquid collection tank 70. The industrial washing machine 10 is internally equipped with a heating device and a refining agent injection device. The heating device is used to heat the biological degumming solution formed by mixing the degumming solution and the biological refining agent. The refining agent injection device is used to inject the biological refining agent. The degumming solution tank 80 is connected to the industrial washing machine 10 and is used to store the degumming solution and the cleaning solution. The degumming waste liquid collection tank 20 is connected to the industrial washing machine 10 and is used to collect the degumming waste liquid generated by the industrial washing machine 10. The degumming waste liquid collection tank 20 is connected to the degumming waste liquid recovery tank 30 and the degumming waste liquid fertilizer tank 40. The degumming waste liquid recovery tank 30 is used to store the upper layer solution obtained by sedimentation, and the degumming waste liquid fertilizer tank 40 is used to store the lower layer solution obtained by sedimentation. The cleaning waste liquid collection tank 70 is connected to the industrial washing machine 10 and is used to collect the cleaning waste liquid generated by the industrial washing machine 10.

[0049] Therefore, as can be understood from the first aspect of the embodiment, the biological degumming system for textile long flax fibers according to the second aspect of the present invention has at least the following beneficial effects: the entire biological degumming system for textile long flax fibers achieves efficient biological degumming of long flax fibers and resource utilization of waste liquid through the coordinated work between the various components, which not only improves production efficiency but also reduces production costs and reduces environmental pollution.

[0050] This biological degumming system for textile long flax fibers adopts the biological degumming method for textile long flax fibers described in the first aspect of the above-mentioned embodiment. The specific structure and operation mode of the system are described in detail below.

[0051] The industrial washing machine 10 is one of the core pieces of equipment in the entire degumming system. It contains a heating device and a refining agent injection device. The heating device uses electric heating elements, evenly distributed at the bottom and side walls of the industrial washing machine 10, and the temperature is precisely controlled by an intelligent temperature control system. During biological degumming, after the degumming solution and bio-refining agent are mixed in the industrial washing machine 10 at a certain ratio to form a biological degumming solution, the heating device is activated to heat the biological degumming solution to a suitable temperature range. This suitable temperature range allows the microorganisms in the bio-refining agent to exert their optimal activity, accelerating the decomposition of the gum on the flax fibers. The refining agent injection device consists of a container for storing the bio-refining agent, a metering pump, and a delivery pipeline. The metering pump precisely controls the injection volume of the bio-refining agent according to a pre-set program, ensuring that the ratio of bio-refining agent to the degumming solution injected each time meets the process requirements, thereby ensuring stable biological degumming results. During the injection of the bio-refining agent, the delivery pipeline draws the bio-refining agent from the container and evenly injects it into the biological degumming solution within the industrial washing machine 10.

[0052] The degumming solution tank 80 is connected to the industrial washing machine 10 via corrosion-resistant pipes. The degumming solution tank 80 has a large volume, capable of storing sufficient degumming and cleaning solutions. Before the degumming process begins, the pre-prepared degumming solution is injected into the degumming solution tank 80 according to production needs. When the industrial washing machine 10 needs replenishment of degumming solution, a transfer pump on the pipeline draws the degumming solution from the degumming solution tank 80 and delivers it to the industrial washing machine 10. Similarly, during the cleaning process after degumming, the transfer pump can be used to deliver the cleaning solution stored in the degumming solution tank 80 to the industrial washing machine 10 for cleaning the long flax fibers.

[0053] The degumming waste liquid collection tank 20 is also connected to the industrial washing machine 10 via a pipeline. After the biological degumming process is completed, the degumming waste liquid generated in the industrial washing machine 10 is discharged into the degumming waste liquid collection tank 20 through a pipeline. The degumming waste liquid collection tank 20 is further connected to the degumming waste liquid recovery tank 30 and the degumming waste liquid fertilizer tank 40, respectively. In the degumming waste liquid collection tank 20, after sedimentation treatment, the relatively clear upper layer of the degumming waste liquid is extracted by a special extraction device and transported to the degumming waste liquid recovery tank 30 for storage. Subsequently, it is reused in the industrial washing machine 10 after coagulation and filtration treatment as described above. The lower layer of the solution, which contains more impurities and gum, is discharged into the degumming waste liquid fertilizer tank 40 for storage. It can be further processed into fertilizer for agricultural planting through fermentation and other methods.

[0054] The cleaning waste liquid collection tank 70 is also connected to the industrial washing machine 10 via a pipeline. After the cleaning process is completed, the cleaning waste liquid generated in the industrial washing machine 10 is discharged into the cleaning waste liquid collection tank 70 through a pipeline. Subsequently, following the aforementioned method, the cleaning waste liquid undergoes staged filtration treatment in the cleaning waste liquid collection tank 70 to obtain a cleaning reuse solution, which is then discharged back into the degumming solution tank 80, thus realizing the recycling of the cleaning waste liquid.

[0055] Reference Figure 2 In some embodiments of the present invention, the system further includes a negative pressure device 50, a degumming waste liquid recovery tank 30, a degumming waste liquid collection tank 20, and a degumming waste liquid fertilizer tank 40, which are respectively connected to the negative pressure device 50. The negative pressure device 50 is provided with an exhaust end 51. A first valve 1 is provided between the industrial washing machine 10 and the degumming waste liquid collection tank 20, a second valve 2 is provided between the degumming waste liquid collection tank 20 and the degumming waste liquid recovery tank 30, a third valve 3 is provided between the degumming waste liquid recovery tank 30 and the negative pressure device 50, a fourth valve 4 is provided between the degumming waste liquid collection tank 20 and the negative pressure device 50, a fifth valve 5 is provided between the degumming waste liquid collection tank 20 and the degumming waste liquid fertilizer tank 40, and a sixth valve 6 is provided between the degumming waste liquid fertilizer tank 40 and the negative pressure device 50.

[0056] The negative pressure device 50 can be a vacuum pump, which has a stable and adjustable negative pressure output capability. The negative pressure device 50 is provided with an exhaust end 51, and an air filter is installed at the exhaust end 51. This filter uses a combination of multi-layer activated carbon filter and high-efficiency air filter, which can effectively filter out odors, harmful substances and fine particles that may be contained in the gas extracted from the system, while facilitating the flow and discharge of liquid in the system.

[0057] The degumming waste liquid recovery tank 30, the degumming waste liquid collection tank 20, and the degumming waste liquid fertilizer tank 40 are all connected to the negative pressure device 50 via negative pressure-resistant pipes. A first valve 1 is installed between the industrial washing machine 10 and the degumming waste liquid collection tank 20. When the biological degumming process is completed and the degumming waste liquid needs to be discharged, the first valve 1 is opened, and the degumming waste liquid in the industrial washing machine 10 flows into the degumming waste liquid collection tank 20 under the action of gravity or the action of the installed negative pressure device 50. A fourth valve 4, which is also an electric ball valve, is installed between the degumming waste liquid collection tank 20 and the negative pressure device 50. When it is necessary to clean the degumming waste liquid collection tank 20 or discharge the degumming waste liquid in the industrial washing machine 10, the fourth valve 4 can also be opened to create a certain negative pressure environment in the degumming waste liquid collection tank 20 using the negative pressure device 50, thereby discharging the degumming waste liquid in the industrial washing machine 10 and storing it in the degumming waste liquid collection tank 20.

[0058] A second valve 2, also an electric ball valve, is installed between the degumming waste liquid collection tank 20 and the degumming waste liquid recovery tank 30. When the degumming waste liquid has completed sedimentation in the degumming waste liquid collection tank 20 and the relatively clear upper layer of solution needs to be transferred to the degumming waste liquid recovery tank 30, the third valve 3 (the electric ball valve between the degumming waste liquid recovery tank 30 and the negative pressure device 50) is opened first to create a negative pressure in the degumming waste liquid recovery tank 30. Then, the second valve 2 is opened. Under the action of the negative pressure, the upper layer of solution is quickly and stably drawn into the degumming waste liquid recovery tank 30. At this time, the first valve 1, the fifth valve 5, and the fourth valve 4 are in the closed state.

[0059] A fifth valve 5, which is an electric ball valve, is installed between the degumming waste liquid collection tank 20 and the degumming waste liquid fertilizer tank 40. When the sedimentation is complete and the lower layer of solution containing more impurities and colloids needs to be transferred to the degumming waste liquid fertilizer tank 40, the sixth valve 6 (the electric ball valve between the degumming waste liquid fertilizer tank 40 and the negative pressure device 50) is opened to create a negative pressure in the degumming waste liquid fertilizer tank 40. Then, the fifth valve 5 is opened, and the lower layer of solution is drawn into the degumming waste liquid fertilizer tank 40 under the action of negative pressure. At this time, the first valve 1, the second valve 2, and the fourth valve 4 are in the closed state.

[0060] Furthermore, in some embodiments of the present invention, a first filter device 90 is provided between the degumming waste liquid recovery tank 30 and the industrial washing machine 10. The first filter device 90 is used to perform coagulation filtration treatment on the upper solution. The first filter device 90 can adopt the coagulation filtration treatment in the first aspect embodiment described above, thereby obtaining a degumming reuse solution, which is then discharged back into the industrial washing machine 10. Further details are omitted in this embodiment.

[0061] Furthermore, referring to Figure 2 In some embodiments of the present invention, the degumming solution tank 80 and the degumming waste liquid recovery tank 30 are respectively connected to the industrial washing machine 10 via a seventh valve 7. In the biological degumming system for long flax fibers for textiles in this embodiment, in order to further optimize the preparation and use process of the degumming solution, the design of connecting the degumming solution tank 80 and the degumming waste liquid recovery tank 30 to the industrial washing machine 10 via a seventh valve 7 is realized. The specific implementation method is as follows.

[0062] Specifically, the system also includes a central control unit. The seventh valve, 7, is an electric three-way ball valve, connected to the central control unit via an electrical wire. The central control unit precisely controls its opening and closing status and opening degree based on a preset program and real-time monitoring data. The degumming solution tank 80, the degumming waste liquid recovery tank 30, and the industrial washing machine 10 are interconnected by pipelines, with the seventh valve 7 installed at the intersection of these three pipelines. Specifically, the pipelines leading from the degumming solution tank 80, the degumming waste liquid recovery tank 30, and the industrial washing machine 10 converge at the seventh valve 7.

[0063] In actual operation, when the system needs to replenish the degumming solution to the industrial washing machine 10, there are two scenarios. The first scenario is using only the fresh degumming solution in the degumming solution tank 80. In this case, the central control unit issues a command to open the channel connecting the degumming solution tank 80 and the industrial washing machine 10 in the seventh valve 7, while simultaneously closing the channel connecting the degumming waste liquid recovery tank 30. The fresh degumming solution in the degumming solution tank 80 flows into the industrial washing machine 10 through the seventh valve 7 under the action of gravity or through a matching transfer pump (the transfer pump can be reasonably selected according to the system scale and flow requirements; a centrifugal pump can be used) to meet the needs of the biological degumming process. The second scenario is using the recycled solution after coagulation and filtration treatment in the degumming waste liquid recovery tank 30 mixed with the fresh degumming solution in the degumming solution tank 80 in a certain proportion. The central control unit precisely controls the opening of the channel connecting the degumming solution tank 80 and the degumming waste liquid recovery tank 30 in the seventh valve 7 according to a preset mixing ratio (which can be adjusted according to factors such as the type of flax fiber, degumming process requirements, and the quality of the recycled solution). For example, if the mixing ratio of fresh degumming solution to recycled solution is set to 2:1, the central control unit will adjust the valve opening so that the fresh degumming solution in the degumming solution tank 80 and the recycled solution in the degumming waste liquid recovery tank 30 flow into the industrial washing machine 10 at the corresponding flow rates. After being fully mixed in the industrial washing machine 10, the mixture is used for the biological degumming of flax fibers.

[0064] Through this system design, the composition and dosage of the degumming solution can be flexibly adjusted according to actual production needs. This not only makes full use of the treated and reusable degumming waste liquid, reducing production costs, but also ensures the quality and stability of biological degumming, thereby improving the overall operating efficiency and economic benefits of the biological degumming system for textile long flax fibers.

[0065] Reference Figure 2In some embodiments of the present invention, the system further includes a positive pressure device 60, which is connected to the industrial washing machine 10 and the degumming waste liquid collection tank 20. An eighth valve 8 is provided between the positive pressure device 60 and the industrial washing machine 10, and the positive pressure device 60 is connected to the degumming waste liquid collection tank 20 through a first valve 1. A ninth valve 9 is provided between the industrial washing machine 10 and the cleaning waste liquid collection tank 70. In the biological degumming system for long flax fibers used in textiles in this embodiment, a positive pressure device 60 and related valves are specially added to further improve the operational flexibility and processing efficiency of the system. Specifically, the positive pressure device 60 is an air compressor with the ability to stably output positive pressure gas. Its power and exhaust volume are reasonably selected according to the scale and actual needs of the entire degumming system to ensure that it can provide sufficient and stable positive pressure power to the system.

[0066] The positive pressure device 60 is connected to the industrial washing machine 10 and the degumming waste liquid collection tank 20 via pressure-resistant and corrosion-resistant pipes. An eighth valve 8 is installed between the positive pressure device 60 and the industrial washing machine 10. This electric ball valve is connected to the system's central control unit via a signal line, and the central control unit precisely controls its opening and closing according to a preset program and actual production needs. When positive pressure rinsing or auxiliary drainage is required inside the industrial washing machine 10, the central control unit issues a command to open the eighth valve 8, allowing the positive pressure gas output from the positive pressure device 60 to enter the industrial washing machine 10 through the pipes. For example, after biological degumming, when it is necessary to thoroughly clean the residual degumming solution and impurities inside the industrial washing machine 10, opening the eighth valve 8 allows positive pressure gas to enter the industrial washing machine 10, increasing the internal pressure and promoting faster discharge of residual liquid. Simultaneously, the gas flow within the industrial washing machine 10 also has a purging effect, blowing off impurities adhering to the inner wall of the equipment and the fibers, thus improving the cleaning effect.

[0067] Therefore, it is understandable that a first valve 1 is installed between the positive pressure device 60 and the degumming waste liquid collection tank 20, which is an electric three-way ball valve. When the waste liquid in the degumming waste liquid collection tank 20 is not drained smoothly or when the degumming waste liquid collection tank 20 needs to be cleaned, the central control unit controls the opening of the first valve 1, closing the channel connecting the degumming waste liquid collection tank 20 and the industrial washing machine 10 in the first valve 1, and simultaneously opening the channel connecting the degumming waste liquid collection tank 20 and the positive pressure device 60. Positive pressure gas enters the degumming waste liquid collection tank 20, increasing the pressure inside the collection tank and helping the waste liquid to drain more smoothly (at this time, the second valve 2 and the third valve 3 need to be opened, and the fourth valve 4 and the fifth valve 5 need to be closed), or the sediment at the bottom needs to be squeezed into the degumming waste liquid fertilizer tank 40 (at this time, the fifth valve 5 and the sixth valve 6 need to be opened, and the second valve 2 and the third valve 3 need to be closed), facilitating subsequent cleaning work.

[0068] A ninth valve 9, which is also an electric ball valve, is installed between the industrial washing machine 10 and the cleaning waste liquid collection tank 70. After the industrial washing machine 10 completes the washing operation, when it is necessary to discharge the cleaning waste liquid into the cleaning waste liquid collection tank 70, the central control unit controls the opening of the ninth valve 9. The cleaning waste liquid in the industrial washing machine 10 flows into the cleaning waste liquid collection tank 70 through the pipeline under the action of gravity or the positive pressure device 60. For example, in some special cases, such as when it is necessary to quickly drain the industrial washing machine 10, the eighth valve 8 can be opened first to introduce positive pressure gas into the industrial washing machine 10, and then the ninth valve 9 can be opened. The positive pressure accelerates the discharge speed of the waste liquid and improves the operating efficiency of the entire system.

[0069] By setting up a positive pressure device 60 and an eighth valve 8 and a ninth valve 9, the system can flexibly control the delivery of positive pressure gas and the liquid flow between various devices according to different process stages and actual needs. This enables diversified operation of the industrial washing machine 10 and the degumming waste liquid collection box 20, further optimizing the performance of the biological degumming system for textile long flax fibers and improving production efficiency and product quality.

[0070] It should be noted that, according to the second aspect embodiment of the present invention, the textile long flax fiber biological degumming system is provided with different valve bodies at different locations, so that the entire textile long flax fiber biological degumming system can achieve efficient biological degumming of long flax fibers and resource utilization of waste liquid through the coordinated work between the components.

[0071] For example, in some embodiments, it is necessary to clean the pipes from which the degumming waste liquid is discharged to prevent impurities from remaining in the pipes after the degumming waste liquid dries and corroding the pipes. Therefore, in the system of this embodiment, the pipe cleaning can be achieved by utilizing the coordination between different valve bodies and the degumming process. Specifically, after the cleaning process is completed, before the cleaning waste liquid is discharged, the eighth control valve is closed, opening the channel in the first valve 1 connecting the degumming waste liquid collection tank 20 and the industrial washing machine 10, while simultaneously closing the channel connecting the industrial washing machine 10 and the positive pressure device 60. The fourth valve 4 is then opened, and the negative pressure device 50 is activated. Under the negative pressure of the negative pressure device 50, part of the cleaning waste liquid in the industrial washing machine 10 flows from the drain outlet into the pipes or into the degumming waste liquid collection tank 20. After the cleaning waste liquid enters the pipes and the degumming waste liquid collection tank 20, the cleaning waste liquid mixes the impurities in the pipes and the degumming waste liquid collection tank 20 with the cleaning waste liquid. Then, the channel connecting the degumming waste liquid collection tank 20 and the industrial washing machine 10 in the first valve 1 is closed, while the channel connecting the degumming waste liquid collection tank 20 and the positive pressure device 60 is opened. The second valve 2, the fourth valve 4, and the sixth valve 6 are closed, and then the fifth valve 5 is opened. The positive pressure device 60 is then activated, allowing the cleaning waste liquid in the pipeline and the degumming waste liquid collection tank 20 to enter the degumming waste liquid fertilizer tank 40 under the positive pressure of the positive pressure device 60, carrying the impurities from the pipeline and the degumming waste liquid collection tank 20. At this time, the degumming waste liquid fertilizer tank 40 is connected to the atmosphere to ensure air pressure flow, thereby completing the cleaning of the pipeline and the degumming waste liquid collection tank 20. The remaining cleaning waste liquid in the industrial washing machine 10 can be discharged into the cleaning waste liquid collection tank 70 after opening the ninth valve 9.

[0072] Reference Figure 2 In some embodiments of the present invention, the cleaning waste liquid collection tank 70 is connected to the degumming solution tank 80, and a second filtration device 100 is provided between the cleaning waste liquid collection tank 70 and the degumming solution tank 80. The second filtration device 100 is used for cascade filtration of impurities in the cleaning waste liquid. Similarly, the second filtration device 100 can use the cascade filtration treatment method in the cleaning waste liquid collection tank 70 described in the first aspect embodiment to treat the cleaning waste liquid, thereby obtaining a cleaning reuse solution, which is then discharged back into the degumming solution tank 80. Through this cascade filtration treatment method, not only is the reuse of cleaning waste liquid realized, saving water resources, but also the pollution caused by waste liquid discharge to the environment is reduced, while production costs are lowered, and the economic and environmental benefits of the entire degumming process are improved. The cascade filtration treatment method will not be described in detail in this embodiment.

[0073] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A method for biodegumming of long jute fiber for textile use, characterized by, The method comprises the following steps: The long hemp fibers are bundled, and then the bundled long hemp fiber roll is put into the trough of the industrial washing machine; The degumming solution is injected into the industrial washing machine, then the bio-refining agent is added, and the bio-degumming solution formed by mixing the degumming solution and the bio-refining agent is heated to 50-55℃, and the industrial washing machine is operated for 50 minutes, and then the degumming waste liquid generated in the industrial washing machine is discharged; The degumming solution is injected into the industrial washing machine for the second time, then the bio-refining agent is added for the second time, and the bio-degumming solution formed by mixing the degumming solution and the bio-refining agent is heated to 50-55℃, and the industrial washing machine is operated for 50 minutes, and then the degumming waste liquid generated in the industrial washing machine is discharged; The degumming solution is injected into the industrial washing machine for the third time, then the bio-refining agent is added for the third time, and the bio-degumming solution formed by mixing the degumming solution and the bio-refining agent is heated to 50-55℃, and the industrial washing machine is operated for 50 minutes, and then the degumming waste liquid generated in the industrial washing machine is discharged; The cleaning solution is injected into the industrial washing machine, and the industrial washing machine is operated for 20 minutes, and then the cleaning waste liquid generated is discharged; The long hemp fiber roll in the industrial washing machine is taken out and put into the spin dryer, the spin dryer is operated for 30 minutes, and then the long hemp fiber roll in the spin dryer is taken out and hung on the hanger for air drying; The bath ratio of the bio-degumming solution formed each time is 1:

24.

2. The method of biodegumming of long jute fibres for textile use according to claim 1, characterized in that, The degumming waste liquid collection tank is communicated with the industrial washing machine, and after the degumming waste liquid generated in the industrial washing machine is discharged, the method further comprises the following steps: the degumming waste liquid is discharged into the degumming waste liquid collection tank, then the recovered degumming waste liquid is precipitated, the upper solution obtained by precipitation is recovered into the degumming waste liquid recovery tank, the upper solution is coagulated and filtered between the degumming waste liquid recovery tank and the industrial washing machine to obtain a degumming recycled solution, then the degumming recycled solution is discharged back into the industrial washing machine, and the lower solution obtained by precipitation is discharged into the degumming waste liquid fertilizer tank.

3. The method of biodegumming of long jute fibres for textile use according to claim 2, characterized in that, The cleaning waste liquid collection tank is communicated with the degumming solution tank and the industrial washing machine respectively, the degumming solution tank is used for storing the degumming solution, the cleaning solution is injected into the industrial washing machine, and the industrial washing machine is operated for 20 minutes, and then the cleaning waste liquid generated is discharged, and the method further comprises the following steps: the cleaning waste liquid is discharged into the cleaning waste liquid collection tank, then the cleaning waste liquid is step-by-step filtered between the cleaning waste liquid collection tank and the degumming solution tank to obtain a cleaning recycled solution, and then the cleaning recycled solution is discharged into the degumming solution tank.

4. The method as claimed in claim 3, wherein the said method is characterized by, The degumming solution is injected into the industrial washing machine for the third time, then the bio-refining agent is added for the third time, and the bio-degumming solution formed by mixing the degumming solution and the bio-refining agent is heated to 50-55℃, and the industrial washing machine is operated for 50 minutes, and then the degumming waste liquid generated in the industrial washing machine is recovered into the degumming waste liquid collection tank, and the method further comprises the following steps: the chemical degumming solution is injected into the industrial washing machine, and the long hemp fiber roll is chemically degummed by using the chemical degumming solution.

5. A system for biodegradation of long fiber in textile characterized in that, The long hemp fiber bio-degumming system comprises: The industrial washing machine is internally provided with a heating device for heating a biological degumming solution formed by mixing a degumming solution with a biological refining agent, and a refining agent injection device for injecting the biological refining agent. The degumming solution tank is in communication with the industrial washing machine and is used for storing the degumming solution and a cleaning solution. The degumming waste liquid collecting tank is in communication with the industrial washing machine and is used for collecting the degumming waste liquid generated by the industrial washing machine. The cleaning waste liquid collecting tank is in communication with the industrial washing machine and is used for collecting the cleaning waste liquid generated by the industrial washing machine.

6. The system for biodegradation of long jute fiber for textile use according to claim 5, wherein, Further comprising a negative pressure device in communication with the degumming waste liquid recycling tank, the degumming waste liquid collecting tank and the degumming waste liquid fertilizer tank respectively, a first valve is arranged between the industrial washing machine and the degumming waste liquid collecting tank, a second valve is arranged between the degumming waste liquid collecting tank and the degumming waste liquid recycling tank, a third valve is arranged between the degumming waste liquid recycling tank and the negative pressure device, a fourth valve is arranged between the degumming waste liquid collecting tank and the negative pressure device, a fifth valve is arranged between the degumming waste liquid collecting tank and the degumming waste liquid fertilizer tank, and a sixth valve is arranged between the degumming waste liquid fertilizer tank and the negative pressure device.

7. The system for biodegradation of long jute fiber for textile use according to claim 6, wherein, A first filtering device is arranged between the degumming waste liquid recycling tank and the industrial washing machine and is used for coagulation and filtration treatment of the upper solution.

8. The system for biodegradation of long jute fiber for textile use according to claim 7, wherein, The degumming solution tank and the degumming waste liquid recycling tank are connected to the industrial washing machine through a seventh valve respectively.

9. The system for biodegradation of long jute fiber for textile use according to claim 7, wherein, Further comprising a positive pressure device in communication with the industrial washing machine and the degumming waste liquid collecting tank respectively, an eighth valve is arranged between the positive pressure device and the industrial washing machine, and the positive pressure device is in communication with the degumming waste liquid collecting tank through the first valve.

10. The system for biodegradation of long jute fiber for textile use according to claim 9, wherein, A ninth valve is arranged between the industrial washing machine and the cleaning waste liquid collecting tank. The cleaning waste liquid collecting tank is in communication with the degumming solution tank, a second filtering device is arranged between the cleaning waste liquid collecting tank and the degumming solution tank, and the second filtering device is used for gradient filtration of impurities in the cleaning waste liquid.

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