51results about "Spinning solution de-aerating" patented technology

The invention discloses a preparation method of ultra-high molecular weight polyethylene fiber, fiber and spinning equipment, and the preparation method comprises the following steps: (1) mixing ultra-high molecular weight polyethylene powder with a solvent, uniformly swelling, and feeding into a twin-screw extruder for fully dissolving to obtain a spinning solution; spraying the spinning solution through a spinneret plate, drafting in an air gap, and cooling in a cooling bath to obtain gel silk; (2) carrying out shrinkage balance on the gel silk; then carrying out pre-extraction and pre-drying to obtain gel filaments with low solvent concentration, and storing the gel filaments in a filament containing barrel for later use; and (3) sequentially carrying out multi-stage extraction, drying, multi-stage drafting and winding on the jelly silk with low solvent concentration to obtain the ultra-high molecular weight polyethylene fiber. Through the steps of shrinkage balance, pre-extraction and drying treatment on the gel silk, adverse effects caused by solvent precipitation and gel silk shrinkage in the standing process of the gel silk can be reduced, the fiber fineness can be controlled to be stable and uniform, the production process is short, the occupied area of equipment is small, and the investment is low.

The present application relates to polybutylene terephthalate (PBT) material toothbrush filament technical field, specifically relates to a kind of multifilament version anti-lodging PBT monofilament and preparation method thereof;The preparation method is realized with the basic concept of multifilament to realize the basic form of monofilament, in the drawing process, every three monofilaments are gathered into a multifilament, in the subsequent water cooling, oiling etc. Process path, with the mode of multifilament, drafting, winding forming are completed.In the condition that monofilament specification remains unchanged, corresponding design is carried out to production process, and the quality indexes such as breaking strength, breaking strength variation coefficient, breaking elongation, breaking elongation variation coefficient of monofilament are controlled.In the realization equipment efficiency is improved three times target, product quality is upgraded, and the anti-lodging performance of PBT monofilament is improved.

The present invention relates to a polyacrylonitrile-based carbon fiber, a polyacrylonitrile solution and a preparation process thereof, which mainly solves the problem that the presence of gel particles in the polyacrylonitrile solution in the prior art causes poor mechanical properties of the carbon fiber. The present invention provides a polyacrylonitrile-based carbon fiber, wherein the micropore radial size LP is less than or equal to 2.0 nm and the micropore aspect ratio L / LP is greater than or equal to 50 and less than or equal to 100, and optionally the diameter Cv value is less than or equal to 3%. The present invention also provides a polyacrylonitrile spinning dope, wherein the total number of gel particles with a particle size greater than 0.15 µm is less than or equal to 1×105 particles / mL, and the proportion of gel particles with a particle size greater than 5 µm to the total gel particles is less than or equal to 0.3%; wherein the equilibrium swelling degree of the gel particles is 250~5000%. The present invention also provides a preparation process of a polyacrylonitrile solution and a preparation process of a polyacrylonitrile-based carbon fiber.

The invention relates to the technical field of chemical fiber production equipment, and discloses a production device of flame-retardant anti-molten-drop chinlon 6 filaments, which comprises a production platform and a console arranged on the production platform, and further comprises a feeding assembly, the feeding assembly comprises a chinlon 6 slice feeding cylinder, a first-stage mixing assembly is arranged below the chinlon 6 slice feeding cylinder, and a second-stage mixing assembly is arranged below the first-stage mixing assembly. The tail end of the first-stage mixing assembly is connected with the second-stage mixing assembly, and the melting assembly is nested on the outer side of the first-stage mixing assembly. According to the device, a two-stage mixing structure of double-screw staggered shearing and planetary gear meshing shearing is adopted, accurate quantity control feeding is achieved through the metering screw, a global uniform shearing field is constructed, a mixing path is prolonged, the technical problems of flame retardant agglomeration and uneven mixing in traditional single-stage mixing are solved, and the flame retardant mixing efficiency is improved. According to the invention, the dispersion precision of the flame retardant in the melt is ensured to reach the required dispersion precision of filament molding, the spinneret orifice blockage and the linear density deviation are avoided through filter plate filtration and multi-stage parameter regulation and control, and the flame-retardant consistency and the molding qualification rate of the chinlon 6 filament are obviously improved.

The invention discloses a high-thermal-conductivity filler dispersion spinning assembly for producing ice-cold cotton-like filaments and a cooling process. The spinning assembly comprises a dispersion spinning assembly body and a three-partition side-blowing cooling assembly. The dispersion spinning assembly body is provided with a magnetic coupling non-penetrating-shaft dynamic shearing dispersion cavity, an annular ultrasonic vibration dispersion section and a gradient filtering unit. The side blowing cooling assembly comprises a low-temperature dry air area, an atomization wet air area and a rectification steady-state air area, and the air temperature, the humidity, the air speed and the atomization amount are adjusted in a linkage mode based on the spinning speed, the winding tension and the tow surface temperature. According to the scheme, the dispersion uniformity of the high-thermal-conductivity filler in the melt can be improved, the filtering pressure difference and spinneret orifice blockage are reduced, broken ends are reduced, the continuous spinning stability is improved, and meanwhile the contact instant cool feeling, the cotton-like style consistency and the washability are enhanced.

The invention discloses a carbon fiber precursor dry-jet wet spinning solidification device and process, and relates to the technical field of carbon fiber precursor spinning. The device comprises a spinning solution storage tank, a temperature control system is arranged on one side of the spinning solution storage tank, and the temperature control system comprises a first temperature control system and a second temperature control system; a conveying pump is fixedly installed at the bottom of the spinning solution storage tank, and high-strength and high-modulus carbon fiber production can be achieved by accurately controlling the components and temperature of the spinning solution. Physical characteristics of fibers are more consistent under stable process conditions, defects are reduced, an automatic metering and temperature control system is adopted, production efficiency can be remarkably improved, manual intervention is reduced, higher production efficiency means that more fibers can be produced within unit time, market requirements are met, production cost of unit products is reduced, and production efficiency is improved. The production cost can be effectively reduced by optimizing process conditions, such as reducing the use amount of a solvent and treating wastes.

The application discloses a preparation method of low-grain-size polyacrylonitrile precursor. The method comprises the following steps: drying and densifying the fiber after hot water drawing and oiling through 10-25 hot rollers, wherein the hot roller pressure is 0.45-0.55 MPa, the temperature interval is 146-167 DEG C, the temperature gradient between the hot rollers is 3-5 DEG C, and then the fiber after the drying and densifying treatment is subjected to steam drawing under the steam pressure of 0.30-0.60 MPa, and the drawing ratio is 4.0-4.5 times, so as to obtain the low-grain-size polyacrylonitrile precursor. The application uses steam as the heating medium, and realizes the effective regulation of the grain size of the precursor by the low-temperature long-time drying and densifying technology and the high-multiple steam drawing technology, the regulation of the drying temperature and time of the precursor bundle, the gradual removal of the water molecules in the bundle by the outward diffusion, and the crystal rupture of the grains under the high stress by the high-multiple steam drawing.

The invention relates to the technical field of textile chemical fiber production, in particular to a production method of chinlon 66 industrial yarn and the chinlon 66 industrial yarn, and the production method comprises the following steps: step 1, performing tackifying treatment on chinlon 66 raw material slices to obtain high-viscosity chinlon 66 slices with formic acid relative viscosity of 75-93; step 2, carrying out humidifying treatment on the high-viscosity chinlon 66 slices obtained in the step 1; 3, the high-viscosity chinlon 66 slices obtained in the step 2 are subjected to melt compression, and chinlon 66 melt is prepared; 4, quantitatively feeding the chinlon 66 melt into a spinning assembly, spraying the chinlon 66 melt through the spinning assembly to form chinlon 66 nascent fibers, and then cooling the chinlon 66 nascent fibers; 5, the cooled nylon-66 nascent fiber is sequentially subjected to oiling, stretching, sizing and winding, and then the nylon-66 industrial yarn is obtained. The invention aims to solve the problem that the industrial yarn produced by the existing production method of the chinlon 66 industrial yarn has higher broken filaments and wool balls.

A dissolving and defoaming device comprises a dissolving tank, a vacuum pump, a circulating pump and at least one filter. The dissolving tank is configured to accommodate an adhesive liquid. The vacuum pump is connected with the top of the dissolving tank and is configured to remove bubbles in the viscose liquid. The circulating pump is connected to the bottom of the dissolving tank and is configured to extract the viscose liquid from the dissolving tank. The filter is connected with the circulating pump and the dissolving tank and located downstream of the circulating pump and upstream of the dissolving tank. The filter is provided with a plurality of screen meshes, and the screen meshes are different in mesh number and are configured to capture impurities and other bubbles of different sizes in the viscose liquid extracted from the dissolving tank. The dissolving and defoaming equipment can provide uniform, bubble-free and impurity-free spinning solution, is beneficial to the spinning process in the later stage and the physical properties of formed fibers, and further improves the product yield.

The application discloses a kind of preparation process of flame-retardant anti-dripping fiber, comprising the following steps: raw material mixing, efficient filtration, melt extrusion, step-by-step cooling solidification, post-processing, and flame-retardant anti-dripping fiber is prepared.The application accurately controls the proportion of flame retardant and mixing process in the raw material mixing stage, ensures that the flame retardant is uniformly dispersed in the polymer matrix, and provides efficient flame-retardant performance for the fiber;Efficient filtration link uses full-automatic replacement filter screen device to remove impurities regularly, ensures that the melt is pure and uniform;Melt extrusion and gradient cooling solidification process effectively reduces the internal stress and defects of the fiber, improves the fiber forming quality;Drafting and heat setting treatment in the post-processing stage further optimizes the fiber structure and enhances the mechanical properties.The flame-retardant anti-dripping fiber finally prepared has excellent flame-retardant anti-dripping performance and stable physical and mechanical properties, and the preparation method realizes the significant improvement of the performance of flame-retardant anti-dripping fiber through multi-link synergistic optimization.

The invention discloses application of a PA material in a composite rubber tube and a preparation method of the PA material. The used raw materials comprise butyl rubber, ethylene propylene diene monomer, lysine modified PA fibers and other auxiliaries. The preparation method of the PA material comprises the following steps: 1) preparing a lysine modified PA melt; (2) preparing non-oriented yarns; and (3) preparing the lysine modified PA fiber. The preparation method comprises the following steps: firstly, synthesizing amino-terminated and side-chain amino polyamide, reacting with bismaleimide twice in stages to obtain high-strength lysine modified PA fibers capable of being crosslinked with butyl rubber and ethylene propylene diene monomer, and carrying out thickness collaborative design on a fiber reinforced layer and a rubber layer to obtain the high-strength lysine modified PA fibers. The breakthrough of fiber strengthening and toughening, no slippage defect in interface connection and high medium resistance is achieved, the strong acid corrosion resistance, the high-pressure pulse service life and the mechanical strength of the rubber pipe are remarkably improved, and the rubber pipe is suitable for occasions such as cooling liquid pipelines, fuel oil pipelines and hydraulic systems which have high requirements for pipelines.

Provided is a method for enhancing anti-oxidative ability, anti-bacterial ability, anti-inflammatory ability and / or anti-allergic ability of a textile. The method comprises adding a cannabidiol in an alginate fiber comprising cannabidiol, wherein the textile comprises a yarn comprising the alginate fiber comprising cannabidiol, the alginate fiber comprising cannabidiol comprises the cannabidiol and an alginate, and the cannabidiol disperses in the alginate fiber comprising cannabidiol.

This invention discloses an electro-welding protective glove and its preparation method. The method comprises: S1, selecting raw materials; S2, preparing a refined terephthalic acid / graphene oxide / ethylene glycol modified slurry; S3, esterification reaction; S4, condensation reaction; S5, heating and melting the modified graphene oxide flame-retardant polyester masterbatch, then spinning it into a bundle; S6, weaving the obtained graphene oxide flame-retardant polyester filament into a woven fabric; S7, preparing a flame-retardant agent finishing solution, immersing the fabric into the finishing solution, then drying it; S8, according to the glove template, cutting and sewing the obtained fabric. This invention also provides an electro-welding protective glove prepared by the method. The method provided by this invention is simple and suitable for electro-welding and other fields, and can effectively protect human safety.

The invention discloses airflow stretching auxiliary drying coupling type PVA blow spinning equipment, which belongs to the technical field of spinning and comprises a base, a blow spinning box is arranged at one end of the top of the base, a support is arranged at the other end of the top of the base, and spinning forming drying mechanisms are uniformly arranged at the top in the blow spinning box along the circumferential direction. The stirring mechanism and the solution conveying mechanism are linked through the driving mechanism, the solution conveying mechanism can be matched with the filtering mechanism to form a negative pressure environment when working, rapid filtering and purifying of the PVA solution are achieved, manual transferring or additional filtering power devices are not needed, and the whole process comprises the steps of raw material mixing, heating and dissolving, solution storage and filtering and purifying; the whole process is completed in an integrated linkage mode, manual intervention links are greatly reduced, operation complexity is lowered, pollution and gel risks in the solution transferring process are avoided, the automation degree and production efficiency of equipment are remarkably improved, and meanwhile energy consumption is saved.

The application relates to the technical field of control systems, in particular to a high-strength polyethylene fiber melt flow control system and method. The system comprises a melt conveying unit, a pressure adjusting unit, a temperature control unit, a flow monitoring unit and a central control unit. The melt conveying unit is used for conveying high-strength polyethylene fiber melt. The pressure adjusting unit is arranged in the pipeline of the melt conveying unit and is used for adjusting the melt conveying pressure. The temperature control unit is used for controlling the temperature in the melt conveying process. The flow monitoring unit is arranged at the end of the melt conveying unit and is used for monitoring the melt flow in real time. The central control unit is electrically connected with the pressure adjusting unit, the temperature control unit and the flow monitoring unit, receives the monitoring data of the flow monitoring unit, and cooperatively adjusts the pressure and temperature of the melt through the pressure adjusting unit and the temperature control unit according to preset flow parameters, so as to realize accurate control of the high-strength polyethylene fiber melt flow.

This invention provides a process for producing cotton-type fibers from low-melting-point PET, comprising the following steps: (1) placing cotton-type fiber PET raw materials and low-melting-point PET chips into a rotary drum for drying to obtain a mixture, wherein the melting point of the cotton-type fiber PET raw materials is 250-260°C and the melting point of the low-melting-point PET chips is 180-220°C; (2) conveying the mixture to a screw extruder for melting; (3) filtering and extruding the molten melt; and (4) cooling and shaping; wherein the cooling and shaping includes ring blowing and winding oiling. This process for producing cotton-type fibers from low-melting-point PET avoids the problem of ring blockage during the screw feeding stage and prevents the chips from vaporizing at high temperatures to form bubble fibers that directly cause spinning breakage and fuzz.

The invention relates to an acid bath filtering system and method for viscose staple fiber production, the acid bath filtering system for viscose staple fiber production comprises an intermediate tank, an acid bath circulating barrel, a spinning machine, an acid bath head tank, a mixing barrel, a degassing mechanism, a tow filtering mechanism and a flash evaporation mechanism, the acid bath head tank is connected with the spinning machine through a pipeline and supplies acid bath liquid to the spinning machine; the spinning machine is connected with the degassing mechanism through a spinning acid return barrel by a pipeline and conveys reaction liquid to the degassing mechanism for degassing, the degassing mechanism is connected with the mixing barrel through a pipeline, the mixing barrel is connected with the acid bath circulating barrel through a pipeline, and the acid bath circulating barrel is connected with the tow filtering mechanism through a pipeline. The tow filtering mechanism is connected with the flash evaporation mechanism by a pipeline through a flash evaporation feeding barrel; the flash evaporation mechanism comprises flash evaporation equipment, a concentrated acid tank, a saltpeter extraction feeding barrel, saltpeter extraction equipment and a settling tank which are sequentially connected through pipelines, the settling tank is connected and communicated with the intermediate tank through a third acid falling pipeline, and the intermediate tank is connected and communicated with the tow filtering mechanism through a return pipe.

The invention discloses spinning equipment and process for continuously polymerizing polyester yarns on a super-soft Raschel polyester blanket, and relates to the technical field of polyester fiber spinning, the spinning equipment comprises a raw material processing unit, a continuous polymerization unit, a melt conveying unit, a spinning unit, a gradient cooling unit, a drafting and shaping unit and a winding unit which are communicated in sequence; the continuous polymerization unit comprises a first-stage esterification reaction kettle, a second-stage prepolymerization reaction kettle and a third-stage final polymerization reaction kettle, the first-stage esterification reaction kettle, the second-stage prepolymerization reaction kettle and the third-stage final polymerization reaction kettle are sequentially connected in series through a conveying pipeline with an insulating layer, and each stage of reaction kettle is provided with an independent temperature control system, an independent pressure control system and an independent stirring device. The continuous polymerization unit adopts a serial structure of the first-stage esterification reaction kettle, the second-stage prepolymerization reaction kettle and the third-stage final polymerization reaction kettle, each stage of reaction kettle is provided with an independent temperature control system, an independent pressure control system and an independent stirring device, and the reaction kettles are connected through a conveying pipeline with a heat preservation layer, so that polymerization parameters of each stage can be accurately controlled.

The invention discloses a rotary impact type discharging device for synthetic leather spinning processing and a discharging process of the rotary impact type discharging device. The rotary impact type discharging device comprises a positioning box body, a side driving device, a feeding pipeline, a rotary material passing cover, a driving shaft, a first net cover, a second net cover and an airflow impact cover. The side driving device controls the rotary material passing cover to rotate periodically through the driving shaft, so that the first net cover and the second net cover alternately rotate to work, and convenience and high efficiency are achieved.

The application discloses a kind of recycling of polyester textile waste, comprising: textile waste is contacted with natural deep eutectic solvent;Un-dissolved polyester fiber is separated by filtration and is washed and dried;After drying treatment, polyester fiber is contacted with organic solvent mixture;Under the protection of inert gas, the mixture after dissolution is subjected to multistage membrane filtration, and the filtered solution is concentrated;The solution after concentration is divided into two parts, one part is added at least one functional monomer and photoinitiator, to obtain functional spinning solution, the other part is as base spinning solution;Functional spinning solution and base spinning solution are simultaneously transported to electrostatic field with voltage of 10-30kV, to form electric field gradient between solution conveying area and fiber collection area, adjust electric field distribution to control the deposition of fiber in collection area, to form nanofiber membrane in collection area.The technical scheme of the application can convert waste polyester textiles into high value-added products.

The present invention relates to a hyaluronate nonwoven fabric composed of hyaluronate fibers and a manufacturing method therefor, wherein a nonwoven fabric composed of only pure hyaluronate is provided without the addition of any heterogeneous fiber, such as PVA which is a binding fiber essentially added during a wet-laid nonwoven fabric manufacturing process, so that a nonwoven fabric composed of only hyaluronate fibers with excellent human compatibility and without cytotoxicity, skin irritation, and the like can be provided, and thus can be used as patches for cosmetic patches, wet wound dressings, tissue adhesion barrier membranes, and the like.

The present application relates to the technical field of fiber spinning equipment, and particularly relates to a needleless melt-blow spinning device, a working method and a nanofiber preparation method. The needleless melt-blow spinning device comprises a feeding mechanism, a melt heating mechanism, a melt output mechanism, a melt traction mechanism and a fiber collecting mechanism. The melt heating mechanism is used for heating and melting the melt-blow grade resin material; the melt output mechanism comprises a filter screen which passes through the melt heating mechanism, and a polymer melt is scraped and coated in the through hole of the filter screen; the melt traction mechanism is used for blowing a gas flow to the filter screen which passes through the melt heating mechanism, and the polymer melt on the filter screen is hot drawn to form a polymer jet; and the fiber collecting mechanism is used for collecting the polymer fiber. The present application can be used for preparing nanofibers, and overcomes the problems of difficult jet hole processing and high cost in the traditional melt-blow process, and low nanofiber preparation efficiency, and avoids the problem of easy clogging of the jet hole in the traditional melt-blow device.

The invention relates to the technical field of purification, in particular to a method for purifying a polyacrylonitrile spinning solution. The method comprises the following steps: carrying out purification treatment on a polyacrylonitrile spinning stock solution through a filtering assembly to obtain filtrate; wherein the ratio of the volume flow rate of the polyacrylonitrile spinning solution to the filtering area of the filtering assembly is 5-20 cm / h. According to the method disclosed by the invention, the quality of the polyacrylonitrile spinning solution can be greatly improved, and the polyacrylonitrile spinning solution subjected to purification treatment can be used for preparing the polyacrylonitrile carbon fiber which is high in tensile strength and small in area proportion of defects on a fracture section of the carbon fiber.

The invention relates to the technical field of polyamide fibers, in particular to polyamide fiber production equipment and a polyamide fiber production process. The equipment aims at solving the problems that in the prior art, hot melting of chinlon 6 raw materials is not uniform, the impurity removal effect is poor, and the spinning forming quality is poor. The equipment comprises a supporting frame, an external box body and an internal box body, the internal box body is provided with a material injection guide pipe and an electric heating rod, one side of the internal box body is provided with a mixing and stirring mechanism, and the other side is connected with a spinning mechanism; the mixing and stirring mechanism comprises a main box body driven by an electric push rod, a filter box body with a filter plate and a flowing pipe I are arranged on the main box body, and a backflow and plugging assembly composed of a flowing pipe II, a moving ring, an electromagnet and a cover plate is arranged on the main box body; the spinning mechanism comprises a spinning box body with a yarn outlet guide pipe and a cooling water pipe; the process comprises the steps of hot melting, impurity removal, reflux mixing and spinning cooling. Uniform hot melting and effective impurity removal are achieved through reciprocating driving and a filtering structure, and the fiber forming quality is improved through controllable spinning and cooling.

The invention discloses an antibacterial super-soft smooth polyester low stretch yarn, and relates to the technical field of polyester low stretch yarn processing, and the antibacterial super-soft smooth polyester low stretch yarn is prepared by the following steps: S1, raw material preparation; s2, yarn pre-orientation; s3, filtering is carried out; and S4, spinning and cooling. The antibacterial super-soft smooth polyester drawn textured yarn has the advantages that 1, the production process is reasonable: the product is good in fiber spinnability, excellent in physical property index, few in broken filaments and broken ends and high in switching success rate, the dyeing uniformity rate reaches 99% or above, and the full roll rate reaches 98% or above; the fabric is smooth in weaving, soft in texture and good in style, the weaving requirement of high-grade garment fabric is met, and the product grade and the additional value are improved. 2, the flame retardant property is strong: chitosan is subjected to hydroxypropylation modification, and then sodium tripolyphosphate is used for ionic crosslinking, so that the adhesive force of the chitosan on the surface of the polyester and the binding strength of the chitosan with other substances are improved, the catalytic decarboxylation carbon formation property of the chitosan is improved, and the flame retardance of the polyester is improved.

A method of integrated and improved production of acrylonitrile fibers is described, in particular from the comonomer start until the spinning step to obtain the final fiber.

The present application discloses a kind of special-shaped fibers of rolled brim straw hat, with the radial section of rolled brim straw hat shape, the radial section includes 2 symmetrically arranged special-shaped units, special-shaped unit includes sequentially connected first circular arc body, flat body and second circular arc body, and 2 first circular arc body is connected, and second circular arc body forms roll edge.The present application further discloses a kind of spinneret for preparing special-shaped fiber, the spinneret has spinneret hole, and the spinneret hole includes 2 symmetrically arranged micro-hole units, micro-hole unit includes sequentially connected first circular arc slit, flat slit and second circular arc slit, and the inner arc surface end of 2 first circular arc slits is respectively inclinedly provided with straight edge, and 2 straight edges are oppositely spaced.The present application further discloses a kind of method for preparing special-shaped fiber.The special-shaped fiber of the present application has good fluffiness, while there is a large amount of static air between adjacent special-shaped fibers, which has good warm-keeping effect and moisture absorption and quick drying function.

The present invention relates to a para-aramid fiber and a method for producing the same. The para-aramid fiber has a high degree of orientation and crystallinity and can exhibit excellent tensile properties.

The application relates to a multistage gradient filter spinneret of an alumina precursor solution and a filtering control method, relates to the field of alumina fiber preparation, and the method comprises the following steps: acquiring video information at each spinning hole of the spinneret, the use time length of a filter screen and the spinning time length of continuous spinning; determining a first target spinning hole with overflow around the spinning hole and a second target spinning hole with blockage from the video information; determining the shape of the fiber spun out of the spinning hole from the video information, and determining a third target spinning hole with abnormal shape; and determining the use progress of the filter screen based on the first target spinning hole, the second target spinning hole, the third target spinning hole, the use time length of the filter screen and the spinning time length. The application has the effect that workers can accurately know whether the filter screen needs to be replaced.

The invention relates to the technical field of viscose production, in particular to a defoaming system for viscose spinning pretreatment and viscose spinning pretreatment equipment. In an adhesive conveying unit of the defoaming system, each defoaming barrel is communicated with an air inlet of a condenser, and the condenser is communicated with a dry vacuum pump; a water outlet of the condenser communicates with the heat exchanger. The vacuum condensation unit is used for condensing and recycling gas generated in the defoaming process of the viscose conveying unit, so that the use amount of steam can be effectively reduced, and bubbles in viscose can be removed as much as possible; a heat exchanger in the vacuum condensation unit can exchange heat for condensate water, so that the use amount of a cooling medium can be reduced, and a good heat exchange effect can be ensured; the device for measuring the pressure, the temperature and the flow is arranged in the viscose conveying unit, and the valve capable of being automatically controlled is arranged, so that the liquid level, the temperature and the vacuumizing process in the defoaming barrel can be effectively and automatically controlled, the production cost is effectively reduced, and the production efficiency is improved.