CN208395330U - A kind of process units of cellulose fibre long filament - Google Patents
A kind of process units of cellulose fibre long filament Download PDFInfo
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- CN208395330U CN208395330U CN201820886277.2U CN201820886277U CN208395330U CN 208395330 U CN208395330 U CN 208395330U CN 201820886277 U CN201820886277 U CN 201820886277U CN 208395330 U CN208395330 U CN 208395330U
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Abstract
The utility model relates to a kind of devices for cellulose solution production cellulose fibre long filament, it successively include spinneret, gas rectifying device, reversing arrangement and solidification liquid collecting tank by fiber production process, the gas rectifying device includes two air layers and the heat exchange layer that is clipped in the middle, wherein the reversing arrangement is set as to be immersed in solidification liquid in reversing arrangement part with the relative position of the liquid in solidification liquid collecting tank and change between not contacting with the liquid in solidification liquid collecting tank, and solidification liquid collecting tank is for holding solidification liquid.
Description
Technical field
The utility model relates to cellulose fibre fields, and in particular to a kind of process units of cellulose fibre long filament.
Background technique
In cellulose fibre production field, hitherto known there are mainly two types of processes.The first is adhering process,
Wherein first by after the native celluloses base extraction such as wood pulp, cotton pulp, by recycle of alkali liquor, remaining part is crushed, is experienced,
And use CS2Yellow is to be dissolved in lye after cellulose sulfonate, maturation, filtering, deaeration, by die extrusion to containing
In the coagulating bath of sulfuric acid or sulfate, cellulose sulfonate is regenerated as the cellulose of gel state again in acid bath.In cellulose
During sulfonate is regenerated as cellulose, sulfur-bearing product can be released, such as H2S、CS2Deng.The technique existing market ownership
Greatly, but since environmental pollution is serious, energy consumption is high, there are also problems for product quality, national policy has limited the hair of this intermediate item
Exhibition.
Cuprammonium process is another method for preparing cellulose fibre.Copper sulphate and ammonium hydroxide effect are generated into Kocide SD
Precipitating washes away sulfate, then Kocide SD is dissolved in generation four ammonia hydroxide of complex in concentrated ammonia liquor, this cuprammonium cooperation
Object solvent is also one of earliest solvent of cellulose, and there are many disadvantages: 1) complex procedures, production efficiency are low；2) ammonium hydroxide and sulphur
The chemical substances such as hydrochlorate recovery cost is high；3) salt by-products such as a large amount of sodium sulphate and sulfate of ammoniac can be generated in production process；
4) technique is used, the processing performance after modified cellulose, cellulose derivative or cellulose are blended with synthetic polymer is paid no attention to
Think；
Due to the disadvantages mentioned above of adhering process and cuprammonium technique, many researchers are dedicated to the research work of characteristics among new solvents of cellulose
Make, to find the new production process of cellulose products.Wherein representative cellulose solvent system has: N, N- dimethyl second
Amide (DMAC)/lithium chloride (LiCl), N,N-dimethylformamide (DMF)/dinitrogen tetroxide (N2O4), dimethyl sulfoxide
(DMSO)/polyformaldehyde ((CH2O)X), N-methylmorpholine-N- oxide (NMMO)/water, ionic liquid etc., by these dicyandiamide solutions
It is prepared by mixing into uniform cellulose solution with cellulose, cellulose solution is then expressed into air from the pore of spinneret
It in layer, is then completely immersed in coagulating bath, the coagulation forming of cellulose is realized in coagulating bath and forms cellulose fibre.The work
The key of skill is the suitable solvent of selection or ionic liquid, although some solvents or ionic liquid can be very good dissolution fiber
Element, but equally exist environmental pollution, solvent recovery purification difficult and the too high problem of cost.The item of industrialized production is realized at present
The solvent that mesh is selected is nontoxic, free of contamination N-methylmorpholine-N- oxide (NMMO), the dicyandiamide solution energy that NMMO and water are constituted
Dissolution cellulose well,
Whole process is without chemical reaction, and NMMO recovery efficiency is high, avoids problem seriously polluted in traditional handicraft, quilt
Referred to as " friendly process ".
NMMO, in spinning, generally uses dry-jet wet-spinning as cellulose solution made of solvent.Patent
CN94192192.1 describes a kind of method by cellulose solution production cellulosic filaments: as shown in Figure 1, first leading to solution
The spinneret 1a with multiple holes is crossed to be squeezed to form multiply fiber solution stream 2a, then make fiber solution stream laterally across
Air-gap 3a, into aqueous spinning tank 4a, to form cellulose fibre long filament 11a.In the method, fiber needs to enter and contain
In the spinning tank of water, cellulose is in spinning tank to form long filament.
Patent CN0286064.3 describes a kind of device for spinning and method by moulding material manufacture continuous shaped body,
Middle moulding material is extruded into the continuous shaped body of essentially long filament shape by extrusion cavities, and continuous shaped body sequentially passes through shielding again
Area, cooling zone, into coagulating bath to form continuous shaped body.In the method, continuous shaped body also has to enter into coagulating bath,
Cellulose can just be frozen into continuous shaped body in coagulating bath.
Currently, requiring coagulating tank substantially using the device of NMMO production cellulose fibre, and only solution stream is complete
Complete to immerse coagulating bath, cellulose could very fast coagulation forming formation fiber.However, just molding tow is in the mistake for passing through coagulating bath
Cheng Zhong, will receive the very big resistance of solidification liquid, and this resistance causes unnecessary drawing-off to tow.Spinning speed is bigger, resistance
It will be multiplied, equally will increase to drawing-off caused by tow；Once the drawing-off of tow causes tow to be broken, would have to stop
Production.Industrialization project can only control spinning speed at 40 ms/min to reduce tow as far as possible by resistance drawing-off at present
Left and right, under causing spinning efficiency very low, and equipment is dispersed, and occupied area is too big.
Summary of the invention
The application embodiment provides a kind of device for cellulose solution production cellulose fibre long filament, raw by fiber
Producing process can successively include spinneret, gas rectifying device, reversing arrangement and solidification liquid collecting tank, and gas rectifying device can be with
Including two air layers and the heat exchange layer being clipped in the middle, wherein the reversing arrangement is set as and the liquid in solidification liquid collecting tank
Relative position can be immersed in solidification liquid in reversing arrangement part and not contact it with the liquid in solidification liquid collecting tank
Between change, solidification liquid collecting tank is for holding solidification liquid.
In one embodiment, reversing arrangement can be set to not contact with the liquid in solidification liquid collecting tank, and
And solidification liquid flusher is set around it.In one embodiment, the guide wire apparatus that reversing arrangement can be controllable for speed.
In another embodiment, described device can also include at least one set of cleaning roller group, fill for cleaning through commutation
Derived fiber is set, wherein cleaning roller group can be made of the cleaning roller of a pair of non-parallel arrangement.Preferably, cleaning roller is respective
Between roll axis with non-zero angle, preferably 0.1 °~5 °.
In yet another embodiment, described device can also include at least one set of drying roller group, cleaned for drying
Fiber, wherein drying roller group can be made of the drier roll of a pair of non-parallel arrangement.
In yet another embodiment, described device can also include at least one wrap-up, for by the fibre of drying
Dimension is wound, and wherein wrap-up can use tension force during package.
In yet another embodiment, fiber can be in the form of multiple fibre element filament tow individually spiral and detour
Pass through cleaning roller group and drying roller group.
In yet another embodiment, spinneret may include multiple pore holes group, and each pore hole group may include
At least one pore, each pore hole group can have the pore of identical quantity, and two adjacent pore hole groups
Between spacing can be greater than the spacing between two adjacent independent pores, preferably greater than 10 millimeters.
In yet another embodiment, the solvent portion of cellulose solution can be selected from water and N-methylmorpholine-N- oxide
(NMMO) mixture, DMF and the N of mixture, DMAC and LiCl2O4Mixture, DMSO and (CH2O)X(polyformaldehyde) mixes
Any in conjunction object, dedicated ionic liquid such as 1- allyl -3- methylimidazole villaumite, 1- butyl -3- methylimidazole villaumite
Kind.Solidification liquid or cleaning solution can be made of the solvent portion of water and cellulose solution.Preferably, the solvent portion of cellulose solution
Divide or solidification liquid can be the aqueous solution that the mass content of NMMO is 1%~30%, the quality that cleaning solution can be NMMO contains
The aqueous solution that amount is 0%~30%.
In another embodiment, beaming device can be set between reversing arrangement and cleaning roller group.
In yet another embodiment, drier roll can be using electric energy fever or thermal medium fever.
In yet another embodiment, turning member can be set between drying roller group and wrap-up.The turning member
Godet, traveller, godet roller or non-rotatable conducting wire pole that can be controllable for speed.
Detailed description of the invention
Fig. 1 is the schematic diagram of the cellulose fibre process units of the prior art.
Fig. 2 is the schematic diagram of the cellulose fibre long filament process units of the utility model, and wherein Fig. 2A shows commutation dress
The situation not contacted with the liquid in solidification liquid collecting tank is set, Fig. 2 B shows the feelings that reversing arrangement part is immersed in solidification liquid
Shape.
Fig. 3 is the overall structure diagram of the cellulose fibre long filament process units of the utility model.
Fig. 4 is the top view of Fig. 3 process units.
Fig. 5 is a kind of schematic diagram of cleaning device of the prior art.
Fig. 6 is the schematic diagram of another cleaning device of the prior art.
The reference numerals are as follows:
1a- spinneret；2a- cellulose solution stream；3a- air-gap；4a- spinning tank；The gas of forced flow in 5a- air-gap
Body；11a- cellulose fibre
1- spinneret；2- cellulose solution stream；3- air layer one；4- heat exchange layer；5- air layer two；6- reversing arrangement；7-
Solidification liquid flusher；8- solidification liquid；9- solidification liquid collecting tank；The air stream of 10- controlled temperature；11- cellulosic filaments；12-
Beaming device；13- cleaning solution flusher；14- first cleans roller group；14U- cleaning roller one；14D- cleaning roller two；15- second
Clean roller group；15U- cleaning roller one；15D- cleaning roller two；16- dries roller group；16U- drier roll one；16D- drier roll two；17-
Commutate component；18- wrap-up；19a- boundling filament tow；Cellulosic filaments after 19b- cleaning for the first time；Second of 19c-
Cellulosic filaments after cleaning；Cellulosic filaments after 19d- drying；20- band cleaning tow；21- cleans water curtain；22- cleaner bath
Slot.
Specific embodiment
As mentioned above, it requires cellulose solution stream passing through spinning in the cellulose fibre process units of the prior art
Silk slot or coagulating tank make cellulose coagulation forming, have to control spinning speed at 40 ms/min or so thus.This is to each
The a large amount of spinnerets of spinneret, and subsequent to produce by the short fibre of the processing such as cutting of fiber is also applicable in reluctantly, but can not expire completely
The production requirement of sufficient cellulose fibre long filament, because the fiber filament limited amount that spinneret sprays every time in long filament production, is produced
The subsequent direct application of long filament out causes the quality requirements to long filament very strict, and one filament fracture all may cause in production
Must not entirely produce not parking.
In device of the utility model using cellulose solution production cellulose fibre long filament, solidified in coagulating tank
The traveling distance that cellulose is pierced by coagulating bath substantially reduces, and forms even entirely without in coagulating bath, but sprays on surface
It spills and is formed on the reversing arrangement of solidification liquid, be thus obviously reduced or almost completely eliminate the tow just shaped and passing through solidification
Suffered resistance during bath, this is to requiring fiber quality, the production for the cellulose fibre long filament for requiring yield particularly advantageous.
Specifically, as shown in Fig. 2, being produced in the process units of the cellulose fibre long filament of the utility model by fiber
Process can successively include that spinneret, gas rectifying device, reversing arrangement and solidification liquid collecting tank, gas rectifying device can wrap
The heat exchange layer for including two air layers and being clipped in the middle, wherein the reversing arrangement is set as and the liquid in solidification liquid collecting tank
Between relative position can be immersed in solidification liquid in reversing arrangement part and not contact with the liquid in solidification liquid collecting tank
Variation, solidification liquid collecting tank is for holding solidification liquid.
When specific production, cellulose solution is made it through into the spinneret including multiple pores after metering pressurization first
Plate 1 forms multiply solution stream 2.
Cellulose solution is that cellulose is dissolved completely in uniform liquid formed in solvent, wherein solvent can for water and
The mixture of NMMO (is abbreviated as " H2O/NMMO "), mixture (DMAC/LiCl), DMF and the N of DMAC and LiCl2O4Mixture
(DMF/N2O4), DMSO and (CH2O)XMixture, dedicated ionic liquid such as 1- allyl -3- methylimidazole villaumite, 1- fourth
Base -3- methylimidazole villaumite etc..Preferably, solvent H2O/NMMO.Mass content of the cellulose in cellulose solution can be with
It is 4%~18%.
Spinneret 1 may include multiple pore holes group, and each pore hole group may include at least one pore, often
A pore hole group can have the pore of identical quantity.For example, may include 6 pore group (such as Fig. 4 on spinneret 1
It is shown), each pore group has 20~1000 pores, and the spacing between adjacent holes group is 10~30 millimeters, independent capillary
Spacing between hole is 1~5 millimeter.But the particular number of pore depends on the description of fiber.The diameter of pore
It can be 0.08~0.3 millimeter, this depends on the thickness of monofilament to be produced.Spacing between two adjacent pore hole groups can be with
Spacing between significantly greater than two adjacent independent pores, preferably greater than 10 millimeters, this can facilitate required manual operation, and
And it is easy to distinguish the long filament that every monofilament is belonged to.
After the air layer 1 that solution stream 2 passes through gas rectifying device, into heat exchange layer 4.The height of air layer 1 can be with
It is 5~200 millimeters, the height of heat exchange layer 4 can be 10~100 millimeters.The air stream of controlled temperature transverse flow in heat exchange layer 4
Dynamic, wherein the temperature of air stream can be 5~40 DEG C, and relative humidity can be not more than 90%.In heat exchange layer 4, cellulose is molten
The temperature of liquid stream 2 is controlled, and fiber is known as on a small quantity, and surface tackiness decline is conducive to fibre forming.The temperature of solution stream 2 exists
After obtaining control in heat exchange layer 4, then by the arrival reversing arrangement 6 of air layer 25.
Reversing arrangement 6 can be the controllable guide wire apparatus of speed, and solidification liquid collecting tank 9 is for holding solidification liquid 8.In Fig. 2A
In, reversing arrangement 6 is set as not contacting with the liquid in solidification liquid collecting tank 9, and sprinkling solidification is provided with around it
The device 7 of liquid, flusher 7 quantitatively can spray solidification liquid 8 to reversing arrangement 6 or solution stream 2.
Solidification liquid 8 is made of the solvent in water and cellulose solution, such as can be water and DMAC/LiCl, water and DMF/
N2O4, water and DMSO/ (CH2O)X, water and NMMO or water and ionic liquid.Preferably, solidification liquid 8 is made of water and NMMO,
Wherein the mass content of NMMO is 1%~30%.Solution stream 2 under the action of solidification liquid 8, cellulose therein at fiber 11,
And solvent portion is solidified liquid 8 and brings solidification liquid collecting tank 9 into.
In the device of the utility model, reversing arrangement 6 can be set to opposite with the liquid in solidification liquid collecting tank 9
Position can be immersed in solidification liquid in reversing arrangement part and change between not contacting with the liquid in solidification liquid collecting tank.
As shown in Figure 1, reversing arrangement (such as godet) is often completely submerged in coagulating tank in the prior art, this makes in coagulating bath
The traveling distance that middle cellulose is pierced by coagulating bath is very long, and the resistance being thus subject to is also very big.According to the utility model, such as
Shown in Fig. 2 B, reversing arrangement only can be partially immersed in solidification liquid, this can be by discharging some solidification liquids or adding less in advance
Add solidification liquid to conveniently realize, such as only 15% reversing arrangement is immersed in solidification liquid.As a result, in solidification liquid fiber
The traveling distance that element is pierced by solidification liquid significantly shortens, so that significantly reducing fiber filament is pierced by suffered resistance during solidification liquid
Power.
Reversing arrangement 6 can be the controllable guide wire apparatus of speed, such as godet.It is immersed in when reversing arrangement is set as part
When in solidification liquid, reversing arrangement 6 can not rotate (such as the driven voller that can be used as subsequent cleaning roller), speed 0, Yi Mianzao
It even splashes at liquid fluctuating, further increases fiber filament and be pierced by suffered resistance during solidification liquid.When reversing arrangement is set
It is set to when not contacted with the liquid in solidification liquid collecting tank, reversing arrangement 6 is preferred to be rotated, this can greatly improve spinning speed
Degree.The velocity of rotation of reversing arrangement can be determined according to the diameter of spinning speed, reversing arrangement.For example, spinning speed can be with
It is 40~280 ms/min, selecting diameter is 150 millimeters of guide wire apparatus, and revolving speed can mutually should be 85~595 revs/min.
Fig. 3 and 4 completely diagrammatically illustrates a kind of process units of cellulose fibre long filament of the utility model, wherein
The downstream of device shown in Fig. 2 also successively includes beaming device 12, cleaning roller group 14 and/or 15, drying roller group 16 and winding dress
Set 18.
As shown in figure 3, fiber 11 is made of the monofilament that a large amount of fiber numbers are 1.1~3.3Dtex, by beaming device 12, collection
Beam at certain fiber number filament tow 19a.It can be seen from figure 4 that boundling is at 6 filament tows altogether.Beaming device 12 1
As be made of ceramic member, the shape of ceramic member can be U-shaped, dog tail type etc..
Contain a large amount of solvent in filament tow 19a, it is necessary to clean up.By cleaning roller group 14 to filament tow 19a
It is cleaned.Cleaning rod group 14 is made of cleaning roller 14U, 14D of a pair of non-parallel arrangement.This can upper and lower cloth to cleaning roller
Set, can also it is horizontally disposed or be in tilted layout, preferably up and down arrangement because whole device can be made compact-sized in this way.This
The diameter of two cleaning rollers may be the same or different, but should have certain folder between their own roll axis
Such as 0.1 °~5 ° of angle, to guarantee that filament tow 19a will not be overlapped when spiral detours on cleaning roller group 14, to extend
Detour length of the filament tow 19a in cleaning roller group 14, it is ensured that the clean level of cleaning.Filament tow 19a is in cleaning roller group
The screw pitch that spiral detours on 14 depends on the angle between the diameter of cleaning roller and the two cleaning roll axis.Such as the institute of Fig. 3 or 4
Show, arrange above or below the two cleaning rollers 14U, 14D, upper roller 14U is vertical, and inclined angle is α, lower roll to lower roll 14D horizontally to the right
The diameter of 14D is d, then the screw pitch D=d*tan (α) that filament tow 19a detours in cleaning roller group 14.
Cleaning solution flusher 13 can be arranged in around cleaning roller group 14, with to cleaning roller group 14 and/or long filament silk
Beam 19a sprays cleaning solution.Cleaning solution can be made of the solvent in water and cellulose solution, and the mass content of water preferably 70%~
100%, more preferable 95%~100%.
According to the residual index request of solvent in filament tow, it can also arrange that multiple groups clean roller group.As shown in figure 3 or 4,
Including two groups of cleaning roller groups 14,15, cleaning solution water content used in every group of cleaning roller group is preferably different, both can guarantee cleaning in this way
Effect can also reduce the cost of solvent purification.
Compared to traditional cleaning device, this cleaning device of the utility model is compact-sized, and occupied area is small, Er Qie
It, can be by simply adjusting tow when the detour for cleaning roller group encloses cleaning of the number to change tow when carrying out technique adjustment
Between, to reach cleaning effect.Fig. 5, Fig. 6 show two kinds of cleaning devices of the prior art.Fig. 5 is combined and is cleaned using multiple roll
The mode of water curtain is cleaned, and Fig. 6 is to use for tow to be completely submerged in cleaning solution to clean, both modes all exist
Equipment investment is big, takes up a large area, once and equipment sizing, the disadvantage of technique adjustment difficulty.
For filament tow 19a after over cleaning, the residual index of solvent has reached requirement, generally no greater than 500ppm,
But water content is still very high, it is therefore desirable to by drying.As shown in figure 3 or 4, roller group 16 is dried by the baking of a pair of non-parallel arrangement
Dry roller 16U, 16D composition, the angle between this method for arranging and roll axis to drier roll and clean as roller group at principle,
Need to guarantee filament tow in drying roller group around line space and detour length, and then guarantee the drying effect of filament tow.
Under normal conditions, need to guarantee the final water content of the filament tow 19d of drying not higher than 10 mass %.Drier roll 16U,
16D can be generated heat using electric energy, can also be generated heat using thermal medium.It preferably, can be using hot water as thermal medium, so not
Only the energy is at low cost, and the manufacturing cost of equipment can also reduce.
Filament tow 19d by drying is by the package of winding wrap-up 18 at the spinning cake of constant weight.Winding winding
Device 18 can be more wrap-ups, be also possible to a wrap-up.In the overall process of package, tension control can be used
System.
Between winding wrap-up 18 and drying roller group 16, commutation component 17 can be set, to change filament tow 19d
Traffic direction, thus with winding wrap-up 18 can preferably cooperate.Commutation component 17 can be traveller, godet roller, lead
Roll dies or conducting wire pole etc..Preferably, the godet controllable using speed, the tension of filament tow adjustable in this way.
Cellulose fibre long filament is produced by the utility model above-mentioned apparatus, on the basis of guaranteeing reliability, spinning speed
Degree can be improved 4~7 times than the prior art, reaches 160~280 ms/min, to significantly improve production efficiency, and reduces
Equipment investment.
So far, with NMMO/H2O is that the device of solvent industry metaplasia production cellulose fibre almost concentrates on short fine life
It produces, and guide wire apparatus need to be completely submerged in solidification liquid so that cellulose, leading to spinning speed is up to 40 ms/min.Cause
If reaching 50 ms/min or higher for spinning speed, the friction between fiber and solidification liquid can take up a large amount of solidification liquids and make
Solidification liquid liquid level is obtained to fluctuate as fluidized state.This problem long-term existence, but never attempt to solve this so far
Problem, but so low spinning speed and fiber filament would rather be endured always, unnecessary drawing-off occurs.This wants quality
Ask not high, the tow just shaped during passing through coagulating bath because suffered resistance occur unnecessary drawing-off be industrially can be with
Receiving, short fine production can even be endured, but for requiring the life of fiber quality, the cellulose fibre long filament for requiring yield
It produces then completely infeasible.Therefore, the technical solution of the utility model solves the technology barrier that technical staff is perplexed always in this field
Hinder, and brings spinning speed and spinning efficiency qualitative leap.
On the other hand, the device of the utility model is obviously equally applicable to produce short fibre.By guide wire apparatus from being totally submerged
State in solidification liquid is moved out solidification liquid (or reducing solidification liquid step by step) step by step, then carries out fiber production,
These schemes are all in the conception range of the utility model.
Embodiment
The utility model is described in more detail by the following examples, 9 examples, including comparative example 1-3 and reality altogether
Apply a 4-9.See Table 1 for details for the implementation condition of each example, wherein all contents indicate mass content；Continuous and stable production reliability
Is defined as: spinneret replacement cycle is 15 days, such as broken end that breaks down during this, around the number of roller be n, then reliability
=(100-n) ÷ 100)；The economy of solvent NMMO recovery purifying is with from aqueous in solidification liquid collecting tank institute recovered solvent
Amount is to measure, and water content is lower, then the economy of recovery purifying is better.
Comparative example 1-3 produces cellulosic filaments using the device of the prior art, and specification is: 160Dtex/80f, filament number
2Dtex.The depth of coagulating bath is 200 millimeters.
The mass concentration of NMMO is about 20% in the coagulating bath that comparative example 2 uses, and spinning speed is set as 40 ms/min,
Continuous and stable production reliability can achieve 97%, and the economy of solvent NMMO recovery purifying is moderate.
Spinning speed is increased to 45 ms/min by comparative example 3, and the mass concentration of NMMO remains unchanged in coagulating bath, still
It is 20%.As a result, it has been found that continuous and stable production reliability decrease is obvious, 78% is fallen below.
Comparative example 1 has adjusted the mass content of NMMO in coagulating bath, content is dropped on the basis of comparative example 3
10%.As a result continuous and stable production reliability is increased to 82%, but the economy of solvent NMMO recovery purifying is greatly reduced.
Embodiment 5 drops to 30 millimeters on the basis of comparative example 2, by the depth of coagulating bath, slowly improves spinning speed.
It is interesting that the reliability of continuous and stable production still reaches 96% when speed is increased to 62 ms/min；But it improves
When to 67 ms/min, i.e., the situation of embodiment 6, the reliability decrease of continuous and stable production find long filament to 82%
The content of NMMO increases in tow 19a.For this purpose, residence time of the tow in the first cleaning roller group increased to 25 by 20 seconds
Second；NMMO mass concentration in cleaning solution used in first cleaning roller group drops to 3% by 5%, and second cleans roller group and drier roll
The technique of group remains unchanged, and the final NMMO remaining index of tow and aqueous index can achieve requirement.
Embodiment 4 has adjusted the mass content of NMMO in coagulating bath, content is dropped on the basis of embodiment 5
10%, continuous and stable production reliability can achieve 91%, but the economy of solvent NMMO recovery purifying is greatly reduced.
Embodiment 8 has fully phased out coagulating bath, and solidification liquid flusher is arranged around reversing arrangement, and that is sprayed is solidifying
The mass concentration of solid-liquid is still 20%.Slowly improve spinning speed.It is mysterious to be, when speed is increased to 160 ms/min
When, the reliability of continuous and stable production still reaches 95%.When being increased to 170 ms/min, i.e. the shape of embodiment 9
Condition, the reliability decrease of continuous and stable production to 92%, the content of NMMO increases in tow 19a.Tow is adjusted the
Residence time in one cleaning roller group was increased to 30 seconds by 20 seconds, and the NMMO mass in cleaning solution used in the first cleaning roller group is dense
Degree drops to 2% by 5%, and the second cleaning roller group and the technique for drying roller group remain unchanged, the final NMMO remaining index of tow
It still can achieve requirement with aqueous index.
Embodiment 7 has adjusted the mass content of NMMO in coagulating bath, drops to it on the basis of embodiment 5
10%, continuous and stable production reliability can shockingly reach 96%, and only the economy of solvent NMMO recovery purifying is not so good.
Have a great impact by the depth that this 9 examples can be seen that coagulating bath to spinning speed.By by coagulating bath
Depth be reduced to 30 millimeters by 200 millimeters, spinning speed can be increased to 62 ms/min by 40 ms/min.This is sufficiently proved
The resistance of coagulating bath is big, has seriously affected the raising of spinning speed.
By embodiment 7-9 it can be found that cancelling coagulating bath, it is changed to spray solidification liquid on reversing arrangement, spinning speed
Raising far beyond the imagination.By adjusting the technique setting of the first and second cleaning roller group, filament tow 19a can be eliminated completely
Middle NMMO content increases bring and adversely affects, and final NMMO content also can control in the range of requiring in product.It is right
For the production of cellulose fibre long filament, the height of spinning speed is directly related to a ton investment for product production capacity.Only ton produces
To a certain extent, the industrialized production of cellulose fibre long filament can be just possibly realized, and be passed so cancelling for the investment decline of product production capacity
The coagulating bath of system, is of great significance.
Table 1
| Example | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| Coagulating bath depth (millimeter) | 200 | 200 | 200 | 30 | 30 | 30 | 0 | 0 | 0 |
| NMMO content (%) in coagulating bath | 10 | 20 | 20 | 10 | 20 | 20 | |||
| It sprays solidification liquid NMMO content (%) | Without sprinkling | Without sprinkling | Without sprinkling | Without sprinkling | Without sprinkling | Without sprinkling | 10 | 20 | 20 |
| The linear velocity (m/min) of reversing arrangement | 0 | 0 | 0 | 0 | 0 | 0 | 170 | 160 | 170 |
| Spinning speed (m/min) | 45 | 40 | 45 | 67 | 62 | 67 | 170 | 160 | 170 |
| NMMO content (%) in tow 19a | 42.3 | 52.3 | 52.5 | 45.7 | 54.7 | 55.0 | 46.8 | 55.4 | 55.7 |
| Tow is in the first clear roller group residence time (second) | 20 | 20 | 20 | 25 | 25 | 25 | 30 | 30 | 30 |
| NMMO content (%) in first cleaning solution | 5 | 5 | 5 | 3 | 3 | 3 | 2 | 2 | 2 |
| NMMO content (%) in tow 19b | 4.9 | 4.8 | 5.0 | 3.5 | 3.3 | 3.4 | 2 | 2 | 2 |
| Tow is in the second clear roller group residence time (second) | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 |
| NMMO content (%) in second cleaning solution | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 |
| NMMO content (PPM) in tow 19c | 487 | 495 | 492 | 482 | 492 | 490 | 492 | 496 | 493 |
| It dries roller group temperature (DEG C) | 110 | 110 | 110 | 110 | 110 | 110 | 110 | 110 | 110 |
| Tow is in drying roller group residence time (second) | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 |
| Water content (%) after tow 19d drying | 9.2 | 9.3 | 9.2 | 9.3 | 9.2 | 9.2 | 9.3 | 9.3 | 9.2 |
| Capillary hole number in each pore group | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 80 |
| The quantity of pore group | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| Filament number (Dtex) | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Air layer height (millimeter) | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
| It exchanges heat layer height (millimeter) | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 |
| Airflow temperature (DEG C) in heat exchange layer | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 |
| Air flow velocity (m/min) in heat exchange layer | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 |
| The relative humidity (%) of air stream | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 |
| Continuous and stable production reliability (%) | 82 | 97 | 78 | 91 | 96 | 82 | 96 | 95 | 92 |
| NMMO purifies economy | Difference | It is moderate | It is moderate | Difference | It is moderate | It is moderate | Difference | It is moderate | It is suitable |
Claims (10)
1. a kind of process units of cellulose fibre long filament, which is characterized in that by fiber production process successively include spinneret, gas
Body fairing, reversing arrangement and solidification liquid collecting tank, the gas rectifying device include two air layers and are clipped in the middle
Heat exchange layer, wherein be set as can be in reversing arrangement portion with the relative position of the liquid in solidification liquid collecting tank for the reversing arrangement
Sub-dip changes between not contacting in solidification liquid and with the liquid in solidification liquid collecting tank, and solidification liquid collecting tank is for holding
Solidification liquid.
2. the apparatus according to claim 1, it is characterised in that reversing arrangement is set as and the liquid in solidification liquid collecting tank
It does not contact, and solidification liquid flusher is set around it.
3. the apparatus of claim 2, it is characterised in that the reversing arrangement is the controllable guide wire apparatus of speed.
4. the apparatus according to claim 1, it is characterised in that described device further includes at least one set of cleaning roller group, for clear
It washes through fiber derived from reversing arrangement, wherein cleaning roller group is made of the cleaning roller of a pair of non-parallel arrangement.
5. device according to claim 4, it is characterised in that there is the angle of non-zero between the respective roll axis of cleaning roller,
Angle is 0.1 °~5 °.
6. the apparatus according to claim 1, it is characterised in that described device further includes at least one set of drying roller group, for drying
The fiber of xeromenia cleaning, wherein drying roller group is made of the drier roll of a pair of non-parallel arrangement.
7. the apparatus according to claim 1, it is characterised in that described device further includes at least one wrap-up, and being used for will
The fiber of drying is wound, and wherein wrap-up uses tension force during package.
8. the device according to any one of claim 4 to 6, it is characterised in that fiber is with multiple fibre element filament tow
Form individually spiral detour by cleaning roller group and drying roller group.
9. device according to any one of claim 1 to 7, it is characterised in that spinneret includes multiple pore holes group,
Each pore hole group includes at least one pore, and each pore hole group has the pore of identical quantity, and two
Spacing between the group of adjacent pore hole is greater than the spacing between two adjacent independent pores, and spacing is greater than 10 millimeters.
10. device according to any one of claim 1 to 7, it is characterised in that the solvent portion of cellulose solution is selected from
Mixture, the N of water and N-methylmorpholine-N- hopcalite, DMAC N,N' dimethyl acetamide and lithium chloride, N- dimethyl methyl
Any one of the mixture of amide and dinitrogen tetroxide, the mixture of dimethyl sulfoxide and polyformaldehyde, ionic liquid；Cellulose
The solvent portion of solution or solidification liquid are the aqueous solution that the mass content of N-methylmorpholine-N- oxide is 1%~30%.
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| CN201820886277.2U CN208395330U (en) | 2018-06-08 | 2018-06-08 | A kind of process units of cellulose fibre long filament |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820886277.2U CN208395330U (en) | 2018-06-08 | 2018-06-08 | A kind of process units of cellulose fibre long filament |
Publications (1)
| Publication Number | Publication Date |
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| CN208395330U true CN208395330U (en) | 2019-01-18 |
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| CN201820886277.2U Active CN208395330U (en) | 2018-06-08 | 2018-06-08 | A kind of process units of cellulose fibre long filament |
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