Para-aramid fiber tow cleans device
This utility model belongs to the auxiliary facility technical field in para-aramid fiber preparation, is specifically related to a kind of para-aramid fiber tow and cleans device.
The chemical name of aforesaid para-aramid fiber is Fanglun 1414's (PPTA fiber), it is that the spinning process being dissolved by PPTA polymer powder and forming spinning solution that is anisotropic and that have liquid crystal behavior employing dry-jet wet-spinning in concentrated sulfuric acid is after spinning head sprays, in special coagulation system for para-aramid fiber tow more cleaned with dilute sulfuric acid for coagulating bath coagulation forming
, neutralize, dry, stretch or shape, then oil winding formed finished fiber, this fiber belongs to high intensity, high-modulus high temperature resistant type fiber.As United States Patent (USP) US3767756, US 20130157054 and world patent WO9634732 describe the preparation method of this fibrid.
As aforementioned, matting is there is in the preparation process of para-aramid fiber tow, clean usually together washing or multiple tracks washing, specifically: washed by tank or roller washing, after fibre bundle washing again through alkali liquid washing to neutralize the sulphuric acid in fiber further.After alkali liquid washing, again pass by a water washing device wash away the alkali liquor that fiber surface is unnecessary.Fiber enters a dehydration device dehydration, the water outside abjection fiber surface or fibre bundle after washing, alkali liquid washing, again washing.Dehydration device can purge fibre bundle by compressed air or gently press fibre bundle to reach the purpose of dehydration with the ceramic bar through polishing.
Be can be seen that by the patent specification accompanying drawing of above-mentioned US20130157054, the dehydration device of this patent is between cleaning between (washing and alkali liquid washing) and drying device (dryer roll), its object is to remove fiber surface and outside moisture, to shorten dry run.Avoid fibre bundle surface to be dried to follow-up hot-rolling because of excess moisture to increase burden.
As is known in the industry, if para-aramid fiber can not be by the acid effectively eccysis of fibrous inside in cleaning process, so on the one hand, finished fiber can be caused to produce macromolecular chain under acidity effect decompose and make fiber lose intensity and lose due use value, on the other hand roller can be made to suffer acid corrosion in follow-up dry run, roller surface is normally carried out by can affect production after acid corrosion, and fibre bundle especially can be made to produce lousiness in dry run.Therefore thoroughly cleaning para-aramid fiber tow is the important process link in para-aramid fiber preparation process.Certainly, if slowing down spinning speed, then cleaning mixture is the most relative with the time of contact of fiber to be extended, and cleaning performance is also improved, but production capacity is produced impact, say, that owing to cleaning performance is inversely proportional to spinning speed, thus be worthless.
Prior art generally improves the cleaning performance of para-aramid fiber tow in the way of increasing cleaning passage and/or extending scavenging period, but contrast experiment's analysis result of the non-finite number of time made for a long time through the applicant shows, the simple cleaning passage that increases can not make cleaning performance reach expection, such as through caustic dip the most after washing, fiber surface still suffers from not by the alkali liquor of eccysis, the phenomenon present in the fibre bundle of the organic impurities contained by salt that additionally acid-base reaction generates in N-process is the most obvious, thus simple increasing is cleaned passage and is Zhi Biao rather than the act that effects a permanent cure, and excessively increase cleaning passage cleanout fluid resource consumption to be caused to increase and clean the raising of cost, run counter to economizing type and energy-saving economic spirit that the current whole society advocates.
When further experiments revealed that of being made of the applicant was cleaned when para-aramid fiber tow is in (i.e. when by way of whole cleaning device) in whole cleaning device and not only there is cornerite but also be attended by the extruding force effect tightening friction, the organic impurities contained by salt that sour and aforementioned acid-base reaction within tow generates just is able to effectively with cleaning mixture abjection, thus clean result can be obviously improved, but to meet this requirement, then must be ensured by cleaning device rational in infrastructure.To this end, the applicant has carried out literature search, but being showed no in disclosed patent up to now and non-patent literature and all have referential technology to enlighten, technical scheme described below produces under this background.
Summary of the invention
Task of the present utility model is to provide under a kind of state contributing to making para-aramid fiber tow to be in not only and there is cornerite but also be attended by the extruding force effect tightening friction and completes to clean and guarantee that the abundant eluting of the organic impurities contained by salt that acid tow within and acid-base reaction generate is used and ensured the quality of tow and avoid to the follow-up dry para-aramid fiber tow cleaning device increased burden.
nullTask of the present utility model is performed by，A kind of para-aramid fiber tow cleans device，Including washing roller、Alkali liquid washing roller、Sig water washing roller、First dehydrator、Second dehydrator and the 3rd dehydrator，Washing roller、Alkali liquid washing roller and sig water washing roller are rotatably arranged in frame with state the most spaced apart，First dehydrator is being arranged in frame corresponding to the position between washing roller and alkali liquid washing roller，Second dehydrator is arranged in frame in the position washed between roller corresponding to alkali liquid washing roller and sig water，And the 3rd dehydrator is arranged in described frame in the position on the right side corresponding to sig water washing roller，The first described dehydrator includes one except tank box、One water retaining cover、Except removing water roller under water roller and one group on one group，Except tank box is arranged in described frame，And connect a drainage interface communicated with except the casing chamber of tank box at this except the middle position of the bottom of tank box，Water retaining cover be pointed to the top except tank box and the side of this water retaining cover and opposite side and except tank box between constitute and have a para-aramid fiber tow by bit port，Except one being rotatably supported on the described corresponding box body wall except tank box every a distribution and when interlocking by bit port formation cross with described para-aramid fiber tow each other except water roller under water roller and one group on one group，Under one group except each in water roller lower except on water roller and one group except two in water roller adjacent on except the position relationship forming Triangle-Profile between water roller，The second described dehydrator and the structure of the 3rd dehydrator are identical with the first dehydrator.
In a specific embodiment of the present utility model, except being 30-50 except the diameter in water roller under water roller and one group on described one group.
In another specific embodiment of the present utility model, on described one group except under water roller and one group radical except water roller be respectively 3-9 root.
The technical scheme that this utility model provides due to by under one group except in water roller each lower except on water roller and one group except two in water roller adjacent on except the position relationship defining Triangle-Profile between water roller, and second, the structure of the 3rd dehydrator is identical with the first dehydrator, thus para-aramid fiber can be made on one group than bundle, down except not only can form cornerite during water roller but also with tighten friction extruding force and so that acid tow within and the abundant eccysis of the organic impurities contained by salt of acid-base reaction generation, it is possible not only to guarantee the quality of tow, and follow-up rate of drying can be accelerated, save energy consumption for drying；Do not affecting spinning speed, do not extending scavenging period and ensure and between excellent cleaning water removal effect three, obtain reasonably balance.
Accompanying drawing explanation
Fig. 1 is embodiment schematic diagram of the present utility model.
Fig. 2 is the schematic diagram of the first dehydrator shown in Fig. 1.
Detailed description of the invention
Refer to Fig. 1, show: washing roller 1, alkali liquid washing roller 2, sig water washing roller 3, first dehydrator 4, second dehydrator 5 and the 3rd dehydrator 6, washing roller 1, alkali liquid washing roller 2 and sig water washing roller 3 are rotatably arranged in frame (not shown) with state the most spaced apart, first dehydrator 4 is being arranged in frame corresponding to the position between washing roller 1 and alkali liquid washing roller 2, second dehydrator 5 is arranged in frame in the position washed between roller 3 corresponding to alkali liquid washing roller 2 and sig water, and the 3rd dehydrator 6 is arranged in described frame in the position on the right side corresponding to sig water washing roller 3.
nullRefer to Fig. 2，Aforesaid first dehydrator 4 includes one except tank box 41、One water retaining cover 42、Except removing water roller 44 under water roller 43 and one group on one group，Except tank box 41 is arranged in aforesaid frame，And also can claim discharge opeing interface except the middle position of the bottom of tank box 41 connects one with the drainage interface 412(communicated except the casing chamber 411 of tank box 41 at this)，Water retaining cover 42 be pointed to the top except tank box 41 and the side of this water retaining cover 42 and opposite side (left side of location status shown in Fig. 2 and right side) and except tank box between constitute and have a para-aramid fiber tow by bit port 421，On one group except under water roller 43 and one group except water roller 44 each other one every a distribution and when with aforementioned para-aramid fiber tow by bit port 421 formed cross staggered be rotatably supported at aforementioned except (box body wall before and after location status shown in Fig. 2) on the corresponding box body wall of tank box 41，Under one group except each in water roller 44 lower except on water roller and one group except two in water roller 43 adjacent on except the position relationship forming triangle between water roller，Owing to being positioned under one group the top except water roller 44 except water roller 43 on one group，Thus it is also possible that say: upper except removing adjacent lower except the position relationship forming Triangle-Profile between water roller of two in water roller 44 under water roller and one group except each in water roller 43 on one group，The most each upper except water roller and each time except water roller can make the para-aramid fiber tow 7 by Fig. 1 and Fig. 2 signal on each except water roller with form a wrap angle sigma when removing water roller each time，Para-aramid fiber tow 7 is made to obtain the tension force of excellence and be in tensioned state，Be conducive to the cleaning mixture removing within para-aramid fiber tow 7，In the present embodiment，The angle of aforementioned wrap angle sigma is 120 °，If applicant is it should be understood that be arranged to make the wrap angle sigma of para-aramid fiber to be 90 ° dehydration roller 44 under dehydration roller 43 on a group and a group，So should also be as being considered as belonging to technical connotation category disclosed in this utility model，In the present embodiment，Except being respectively 30 except water roller 44 respectively 5 and 4 and diameter under water roller 43 and one group on one group.Further illustrate the para-aramid fiber tow 7a after cleaning and being dehydrated in fig. 1 and 2.
Only change the radical removing water roller 43 on a group into 4, change the radical removing water roller 44 under a group into 3, and 40 will be changed into except the diameter removing water roller 44 under water roller 43 and a group on one group.
Only change the radical removing water roller 43 on a group into 9, change the radical removing water roller 44 under a group into 8, and 50 will be changed into except the diameter removing water roller 44 under water roller 43 and a group on one group.
In sum, the technical solution of the utility model overcomes the deficiency in prior art, completes invention task, has cashed the technique effect described in applicant's superincumbent technique effect hurdle faithfully.