CN110592729B - Continuous production electrolysis device for fibers - Google Patents

Continuous production electrolysis device for fibers Download PDF

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Publication number
CN110592729B
CN110592729B CN201911005624.1A CN201911005624A CN110592729B CN 110592729 B CN110592729 B CN 110592729B CN 201911005624 A CN201911005624 A CN 201911005624A CN 110592729 B CN110592729 B CN 110592729B
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electrode ring
fibers
continuous production
electrode
electrolytic cell
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CN110592729A (en
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鲁建国
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Zhende Medical Co Ltd
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Zhende Medical Co Ltd
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    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01FCHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F11/00Chemical after-treatment of artificial filaments or the like during manufacture
    • D01F11/04Chemical after-treatment of artificial filaments or the like during manufacture of synthetic polymers
    • D01F11/06Chemical after-treatment of artificial filaments or the like during manufacture of synthetic polymers of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01FCHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/28Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D01F6/34Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds comprising unsaturated alcohols, acetals or ketals as the major constituent
    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01FCHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/44Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
    • D01F6/50Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyalcohols, polyacetals or polyketals

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Abstract

The invention discloses a continuous production electrolysis device for fibers, which comprises: an electrode ring with positive electricity on the inner side and negative electricity on the outer side and allowing fibers to pass through, a driving fan arranged beside the electrode ring and allowing fibers to pass through and drive to form water circulation, exhaust ports arranged on two sides of the upper end of the electrolytic cell, water supplementing ports arranged on the upper end of the electrolytic cell, and electrolytic product liquid draining ports arranged on two sides of the lower end of the electrolytic cell; the water circulation direction is opposite to the movement direction of the fiber; the invention can discharge the electrolytic product in time, reduce the impurity, facilitate the continuous production; the structure can ensure that the fiber only contacts hydroxide ions converged at the positive electrode, further improve the purity and reduce impurities.

Description

Continuous production electrolysis device for fibers
Technical Field
The invention relates to the field of fiber production, in particular to a continuous production electrolysis device for fibers.
Background
Polyvinyl alcohol (PVA) is a water-soluble polymer, and is obtained by alcoholysis of polyvinyl acetate, each repeating unit contains a hydroxyl group, and a large number of hydrogen bonds are contained in molecules and among molecules, so that the PVA molecule has high crystallinity, chemical stability, thermal stability and other performances. The average molecular weight of the polyvinyl alcohol fiber is 60000-250000, the thermal decomposition temperature is 200-220 ℃, and the melting point is 225-230 ℃.
As shown in figure 1, the existing scheme adopts PVA as raw material and mirabilite as coagulation bath; however, such a process has the following drawbacks:
1, the purity of the PVA fiber is not high, and the impurity is more;
2, the coagulation bath needs to use mirabilite, and the problem brought by mirabilite is that: the polyvinyl alcohol fiber preparation links in Chinese patent 201210416178.5 and Chinese patent 200610032535.2 adopt mirabilite solution with a certain concentration to be used as coagulation bath for spinning. In both patents, although the residual weight ratio of mirabilite is made to be less than 0.1% by the process, na2 so4.10h2o remained on the polyvinyl alcohol fiber is a strong electrolyte, and if such fiber is applied to the wound surface of the nursing human body, the water/electrolyte imbalance of the wound surface is caused, and the use risk is increased.
3, Byproducts such as sodium acetate and the like are generated in the process: alcoholysis of polyvinyl acetate can be carried out under acidic or basic conditions. The alkaline condition process has absolute advantage of economic benefit, so that the prior polyvinyl alcohol production mostly adopts sodium hydroxide and potassium hydroxide for alcoholysis. The alkaline alcoholysis has two alcoholysis processes, namely a high alkaline process and a low alkaline process in the PVA production process. The high-alkali method has the advantages of high alcoholysis speed, high production capacity, more side reactions, more sodium acetate content in PVA products, lower purity of PVA and high ash content; the low-alkali method has the outstanding advantages of low sodium hydroxide consumption, less side reaction, correspondingly less sodium acetate byproduct, low ash content and low alcoholysis speed due to low alkali mole ratio. The polyvinyl alcohol prepared by the high-alkali method or the low-alkali method can generate a certain amount of sodium acetate, and the existence of the sodium acetate has potential risks for wounds, because the exudate components of the wounds are mostly water, the water and the sodium acetate generate acetic acid and sodium hydroxide which are easy to volatilize, and the sodium hydroxide is taken as a strong alkali to cause certain harm. In addition, researches show that the wound surface of the human body is beneficial to healing in a slightly acidic environment, and the sodium hydroxide changes the alkalinity of the wound surface which is nursed by the polyvinyl alcohol fiber, so that the wound surface healing is not facilitated, and a pH value environment which is suitable for bacteria is generated, thereby increasing the infection risk. Ash is composed of fine particles which contain or adhere to many substances harmful to the human body, such as heavy metals.
4, Hydroxyl-OH is a polar group, can form a hydrogen bond with water of wound exudates, and has good adsorptivity to water molecules; acetate acetoxy-OCOCH 3 is an ester group that does not absorb water. It can be seen that for medical dressings, -OH properties are much greater than-OCOCH 3, which requires a very high degree of alcoholysis. When PVA alcoholysis degree is high, the volume of side groups-H and-OH is small, and the side groups can enter crystallization points without causing stress, so that hydroxyl groups in PVA macromolecules are mutually associated in a hydrogen bond mode, macromolecules are orderly arranged, water molecules are difficult to enter the PVA macromolecules, solvation is difficult, water solubility is poor, and performance is stable. When the PVA alcoholysis degree is low, the association of hydrogen bonds is further weakened due to the increase of-OCOCH 3, and the directionality of PVA macromolecules is destroyed, so that water molecules easily enter between the PVA macromolecules, and the dissolution effect of water on the PVA is improved. For a dressing for nursing a wound surface, the risk of leaving foreign matters on the wound surface is increased due to the existence of water in exudates.
The company develops a preparation method of PVA fibers, and patent numbers: PCT/CN2019/110559; PVAc (polyvinyl acetate) is adopted to replace PVA, and then an electrolytic coagulation bath is used in a matching way, so that mirabilite is not required to be used in the coagulation bath, PVA is obtained by alcoholysis of PVAc in an electrolytic cell, and the produced PVA fiber has high purity and few impurities.
In continuous production, electrolyte accumulation in the electrolytic cell can affect electrolytic reaction in the electrolytic cell or residual electrolyte pollutes fibers so that the fibers carry impurities, and the electrolytic cell is required to continuously produce the fibers.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide a continuous production electrolysis device for fibers, which can timely discharge electrolysis products, reduce impurities and is convenient for continuous production; the structure can ensure that the fiber only contacts hydroxide ions converged at the positive electrode, further improve the purity and reduce impurities.
In order to achieve the above object, the present invention adopts the following technical scheme:
a continuous production electrolysis apparatus for fibers comprising: an electrode ring with positive electricity on the inner side and negative electricity on the outer side and allowing fibers to pass through, a driving fan arranged beside the electrode ring and allowing fibers to pass through and drive to form water circulation, exhaust ports arranged on two sides of the upper end of the electrolytic cell, water supplementing ports arranged on the upper end of the electrolytic cell, and electrolytic product liquid draining ports arranged on two sides of the lower end of the electrolytic cell; the water circulation direction is opposite to the movement direction of the fiber.
In the continuous production electrolysis device for the fiber, a proton exchange membrane is arranged between the electrode ring and the electrolysis cell.
The continuous production electrolysis device for the fiber is characterized in that the electrode ring is formed by a plurality of groups of electrodes, each group of electrodes is externally connected with a direct current power supply, the inner side of the electrode ring is a positive electrode, and the outer side of the electrode ring is a negative electrode.
The continuous production electrolysis device for the fiber has the advantages that the positive electrode and the negative electrode are connected through the insulating bracket.
In the continuous production electrolysis device for the fibers, a guide slope is arranged between the lower end of the electrode ring and the liquid outlet of the electrolysis product.
In the continuous production electrolysis device for the fibers, the lower end of the electrode ring is provided with the convex plate; the upper end of the convex plate is a plane plate, and the two sides of the convex plate are sloping plates.
The continuous production electrolysis device for the fibers has the slope plate with the inclination angle of 45 degrees.
In the continuous production electrolysis device for the fibers, the outer frame of the driving fan is overlapped with the inner ring of the electrode ring.
The invention has the advantages that:
According to the invention, water can be timely supplemented and the electrolysis product can be timely discharged through the cooperation of the water circulation, the water supplementing port and the electrolysis product liquid discharging port, when the blades of the driving fan rotate, the driven water flow direction is opposite to the fiber trend, so that the fiber is prevented from contacting the electrolysis product, the impurity is reduced, and the continuous production is convenient;
the design of the proton exchange membrane further isolates the electrolysis products and prevents the electrolysis products from entering the fiber channel;
the structural design of the invention can ensure that the fiber only contacts hydroxide ions converged at the positive electrode, further improve the purity and reduce the impurities.
Drawings
FIG. 1 is a cross-sectional view of one embodiment of the present invention;
FIG. 2 is a schematic view of one embodiment of a water cycle of the present invention;
Fig. 3 is a schematic view of an embodiment of the drive fan of the present invention.
Meaning of reference numerals in the drawings:
1 electrode ring, 2 driving fan, 201 sheets, 3 exhaust port, 4 water supplementing port, 5 electrolyte product liquid discharging port, 6 proton exchange membrane, 7 convex plates, 701 plane plates and 702 slope plates.
Detailed Description
The invention is described in detail below with reference to the drawings and the specific embodiments.
The spinning step of the preparation method of PVA fiber needs to inject spinning solution into a spinneret plate under the conditions of 0.05-0.6MPa and the temperature of 45-55 ℃, the sprayed fiber enters a direct current electrolytic cell for coagulation bath, the direct current voltage of the direct current electrolytic cell is 1.23V-200V, and a series of reactions of alcoholysis, electrolytic catalysis alcoholysis and alcohol lever are carried out; the solution formulation in the electrolytic coagulation bath comprises: alkali, alcohol, water; the solution formulation in the electrolytic coagulation bath comprises: alkali, alcohol, water; the base includes: lithium hydroxide, sodium hydroxide, potassium hydroxide, rubidium hydroxide, cesium hydroxide, francium hydroxide, calcium hydroxide, strontium hydroxide, barium hydroxide, radium hydroxide, thallium hydroxide, silver diammine hydroxide, choline, thallium hydroxide, NR 4 OH. The alcohol includes: R-CH 2OH(CH3CH2 OH),
As shown in fig. 1, in order to allow continuous production of fibers, an electrolytic cell is designed comprising: an electrode ring 1 with positive electricity on the inner side and negative electricity on the outer side and allowing fibers to pass through, a driving fan 2 which is arranged beside the electrode ring 1 and allows fibers to pass through and drive to form water circulation, an exhaust port 3 which is arranged at two sides of the upper end of the electrolytic cell, a water supplementing port 4 which is arranged at the upper end of the electrolytic cell, and an electrolytic product liquid draining port 5 which is arranged at two sides of the lower end of the electrolytic cell; the water circulation direction is opposite to the movement direction of the fiber. The outer frame of the driving fan 2 is overlapped with the inner ring of the electrode ring 1, so that the design ensures that the fiber can smoothly pass through the channel between the electrode ring 1 and the driving fan 2, the fiber passes through the middle of the electrode ring 1 and the blades 201 of the driving fan 2, and when the blades 201 rotate, the driven water flow direction is opposite to the fiber trend; avoiding the fiber contacting the electrolysis product, reducing the impurity and facilitating the continuous production.
A proton exchange membrane 6 is arranged between the electrode ring 1 and the electrolytic cell. As shown in fig. 2, the water circulation is driven by the sheet 201, the water firstly passes through the positive electrode area inside the electrode ring 1, then passes through the proton exchange membrane 6 connected with the electrode ring 1 and the edge of the electrolytic cell, enters the negative electrode area, and then flows into the area of the sheet 201 from the negative electrode area for the next circulation. The design of the proton exchange membrane 6 further isolates the electrolysis products from entering the fibre channels.
As one preferable mode, the electrode ring 1 is formed by a plurality of groups of electrodes, each group of electrodes is externally connected with a direct current power supply, the inner side of the electrode ring 1 is a positive electrode, and the outer side of the electrode ring is a negative electrode; the positive electrode and the negative electrode are connected by an insulating bracket.
A guide slope is arranged between the lower end of the electrode ring 1 and the electrolyte outlet 5; as shown in fig. 1, the lower end of the electrode ring 1 is provided with a convex plate 7; the upper end of the convex plate 7 is a plane plate 701, and two sides are sloping plates 702. Preferably, the slope plate 702 is inclined at 45 degrees. The relationship of the electrolysis products due to gravity, such as: sodium sulfate, sodium acetate, sulfuric acid, sodium hydroxide, etc., all having a specific gravity greater than that of water, slide along 45 deg. downward sloping plates 702 on both sides toward the electrolysis product drain 5 at the bottom of the cell.
According to the invention, water can be timely supplemented and the electrolysis product can be timely discharged through the cooperation of the water circulation, the water supplementing port 4 and the electrolysis product liquid discharging port 5, when the blades 201 of the driving fan 2 rotate, the driving water flow direction is opposite to the trend of the fibers, the fibers are prevented from contacting the electrolysis product, the impurities are reduced, and the continuous production is convenient; the design of the proton exchange membrane 6 further isolates the electrolysis products and prevents the electrolysis products from entering the fiber channel; the structural design of the invention can ensure that the fiber only contacts hydroxide ions converged at the positive electrode, further improve the purity and reduce the impurities.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be appreciated by persons skilled in the art that the above embodiments are not intended to limit the invention in any way, and that all technical solutions obtained by means of equivalent substitutions or equivalent transformations fall within the scope of the invention.

Claims (4)

1. A continuous production electrolysis apparatus for fibers, comprising: an electrode ring with positive electricity on the inner side and negative electricity on the outer side and allowing fibers to pass through, a driving fan arranged beside the electrode ring and allowing fibers to pass through and drive to form water circulation, exhaust ports arranged on two sides of the upper end of the electrolytic cell, water supplementing ports arranged on the upper end of the electrolytic cell, and electrolytic product liquid draining ports arranged on two sides of the lower end of the electrolytic cell; the water circulation direction is opposite to the movement direction of the fiber; a guide slope is arranged between the lower end of the electrode ring and the electrolyte outlet; a convex plate is arranged at the lower end of the electrode ring; the upper end of the convex plate is a plane plate, and two sides of the convex plate are sloping plates; the inclination angle of the slope plate is 45 degrees; the electrode ring is formed by a plurality of groups of electrodes, each group of electrodes is externally connected with a direct current power supply, the inner side of the electrode ring is a positive electrode, and the outer side of the electrode ring is a negative electrode.
2. A continuous production electrolysis apparatus for fibers according to claim 1, wherein a proton exchange membrane is disposed between the electrode ring and the electrolysis cell.
3. The continuous production electrolysis apparatus for fibers according to claim 1, wherein the positive electrode and the negative electrode are connected by an insulating bracket.
4. A continuous production electrolysis apparatus for fibers according to claim 1, wherein the outer frame of the drive fan coincides with the inner ring of the electrode ring.
CN201911005624.1A 2019-10-22 2019-10-22 Continuous production electrolysis device for fibers Active CN110592729B (en)

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CN110592729B true CN110592729B (en) 2024-05-17

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1339520A (en) * 2001-09-29 2002-03-13 清华大学 Method for preparing polymer gradient material by using electric field
CN103787468A (en) * 2014-01-26 2014-05-14 成都玉龙化工有限公司 Electrolysis wastewater treatment device, PVB (Polyvinyl Butyral) production wastewater treatment device and PVB production wastewater treatment process
CN104088022A (en) * 2014-07-02 2014-10-08 北京化工大学 Combination electrostatic spinning device and method for preparing multi-stage ultrafine fiber
KR20180023305A (en) * 2016-08-25 2018-03-07 한국기계연구원 Manufacturing method of nanocomposite fiber and nanocomposite fiber manufactured therefrom
CN211142250U (en) * 2019-10-22 2020-07-31 振德医疗用品股份有限公司 Continuous production electrolytic device for fibers

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1339520A (en) * 2001-09-29 2002-03-13 清华大学 Method for preparing polymer gradient material by using electric field
CN103787468A (en) * 2014-01-26 2014-05-14 成都玉龙化工有限公司 Electrolysis wastewater treatment device, PVB (Polyvinyl Butyral) production wastewater treatment device and PVB production wastewater treatment process
CN104088022A (en) * 2014-07-02 2014-10-08 北京化工大学 Combination electrostatic spinning device and method for preparing multi-stage ultrafine fiber
KR20180023305A (en) * 2016-08-25 2018-03-07 한국기계연구원 Manufacturing method of nanocomposite fiber and nanocomposite fiber manufactured therefrom
CN211142250U (en) * 2019-10-22 2020-07-31 振德医疗用品股份有限公司 Continuous production electrolytic device for fibers

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