CN105818291B - PLA delustring section production system - Google Patents
PLA delustring section production system Download PDFInfo
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- CN105818291B CN105818291B CN201610233623.2A CN201610233623A CN105818291B CN 105818291 B CN105818291 B CN 105818291B CN 201610233623 A CN201610233623 A CN 201610233623A CN 105818291 B CN105818291 B CN 105818291B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
- B29B9/065—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion under-water, e.g. underwater pelletizers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/06—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from hydroxycarboxylic acids
- C08G63/08—Lactones or lactides
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/78—Preparation processes
- C08G63/785—Preparation processes characterised by the apparatus used
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- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polyesters Or Polycarbonates (AREA)
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Abstract
PLA delustring section production system, including aggregation framework, pelleter and cooling bay, agitator tank is sequentially provided with aggregation framework from top to bottom, first poly- tank and eventually poly- tank, stirring pot bottom is connected by the first conveying pipeline with first poly- tank top, first conveying pipeline is provided with PLA pre-polymerization mixing device, first poly- pot bottom is connected by the second conveying pipeline with poly- tank top eventually, poly- pot bottom is connected with the 3rd conveying pipeline eventually, 3rd conveying pipeline is provided with sound integrated pipeline formula mixing device, the discharging opening of 3rd conveying pipeline is connected with the polylactic acid melt extrusion orifice plate above cooling bay.Present invention ensure that the melt in prepolymerization pipe flows downward under constant speed state, and make melt temperature in prepolymerization pipe also basically identical, the present invention directly sets some groups of batch mixing units on the 3rd conveying pipeline, eliminate and mixing system is installed on conveyance conduit, cost is saved, reach the purpose of uniform batch mixing, conveying and batch mixing efficiency greatly improve.
Description
Technical field
The invention belongs to poly lactic acid polymerized technical field, more particularly to a kind of PLA delustring section production system.
Background technology
Poly lactic acid polymerized process includes pre-polymerization and gathered eventually.The melt for needing to polymerize is first had to by pre-polymerization, the equipment of pre-polymerization
It is the tank body of a vertical type cylinder shape, prepolymerization pipe is vertically provided with the top of tank body.Need prepolymerized melt from
The upper end of prepolymerization pipe quantitatively enters in prepolymerization pipe, by self gravitation and steadily flows down to from the top down in tank body.By
In the friction factor of melt and prepolymerization tube wall, the melt of prepolymerization tube hub flow downward speed than prepolymerization tube wall at
The downward flowing velocity of melt it is fast, and the temperature at prepolymerization tube wall and the temperature of prepolymerization tube hub also have difference
Not.And preferably situation is；1st, melt flows downward under constant speed state；2nd, it is every when melt flows downward in prepolymerization pipe
The tube wall of individual aspect and the solution temperature of prepolymerization tube hub be desirably also；3rd, due to being used to convey PLA after eventually gathering
Conveyance conduit it is longer, close to tube wall high polymer molten viscosity it is especially big, polylactic acid melt is in course of conveying because of melt
Molecular weight of high polymer wider distribution caused by flow velocity is uneven（It is uneven）Problem, impurity can not effectively filter out, so as to shadow
Sound arrives spinning quality.To reach this purpose, need to assemble array batch mixing preheater in prepolymerization pipe, to meet wanting for polymerization technique
Ask.
The content of the invention
The present invention is in order to solve weak point of the prior art, there is provided it is a kind of can be by prepolymerization inside pipe wall and center
Melt keeps basic constant speed to flow downward and prepolymerization inside pipe wall can be swapped with the melt at center and mixes keeping temperature
Unanimously, the PLA delustring section production system being well mixed in poly- rear course of conveying eventually.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：PLA delustring section production system, including
Aggregation framework, pelleter and cooling bay, agitator tank, first poly- tank and poly- tank eventually, stirring are sequentially provided with aggregation framework from top to bottom
Pot bottom is connected by the first conveying pipeline with first poly- tank top, and the first conveying pipeline is provided with PLA pre-polymerization mixing device, first
Autocontrol valve and the first measuring pump, first poly- pot bottom is connected by the second conveying pipeline with poly- tank top eventually, on the second conveying pipeline
Provided with the second autocontrol valve and the second measuring pump, poly- pot bottom is connected with the 3rd conveying pipeline eventually, along melt on the 3rd conveying pipeline
Flow direction is sequentially provided with the 3rd measuring pump and sound integrated pipeline formula mixing device, and the discharging opening of the 3rd conveying pipeline is connected with position
Polylactic acid melt above cooling bay extrudes orifice plate, is loaded with cooling water in cooling bay, the working end of pelleter is located at cooling
In pond, the discharge end of pelleter is located at outside cooling bay；
PLA pre-polymerization mixing device includes the prepolymerization pipe that is arranged in vertical, in prepolymerization pipe from top to bottom at least
Provided with two batch mixing preheaters, all equal structures of batch mixing preheater are identical；
Each batch mixing preheater includes the first upper conical guide shell, the second upper conical water conservancy diversion with same center line
Cylinder, the first inferior pyramidal guide shell, the second inferior pyramidal guide shell, upper shunting cone cylinder and lower shunting cone cylinder；
First upper conical guide shell and the first inferior pyramidal guide shell are upper coarse and lower fine and upper and lower permeable structures, the first epicone
Shape guide shell bottom diameter is more than the second upper conical guide shell bottom diameter, the second upper conical guide shell and the second inferior pyramidal water conservancy diversion
Cylinder is up-thin-low-thick and upper and lower permeable structures, in the first upper conical guide shell bottom diameter and the second upper conical guide shell upper end
Footpath is equal, and the first inferior pyramidal guide shell bottom diameter is equal with the second inferior pyramidal guide shell upper-end inner diameter, the first upper conical water conservancy diversion
Cylinder upper end outer, the second upper conical guide shell lower end outer, the first inferior pyramidal guide shell upper end edge and the second inferior pyramidal water conservancy diversion
Cylinder lower end edge is fixedly connected with prepolymerization inside pipe wall, the first upper conical guide shell lower end edge and the second upper conical guide shell
Upper end edge is fixedly connected, and the first upper conical guide shell lower end edge is fixedly connected with the second upper conical guide shell upper end edge,
First inferior pyramidal guide shell lower end edge is fixedly connected with the second inferior pyramidal guide shell upper end edge；
Upper shunting cone cylinder is the structure that top sharply blocks, bottom is open, and lower shunting cone cylinder sharply blocks for bottom, top
Open structure, upper shunting cone cylinder bottom diameter are equal to lower shunting cone cylinder upper-end inner diameter, and upper shunting cone cylinder bottom diameter is less than pre-
It polymerize bore, upper shunting cone cylinder lower end edge is fixedly connected with lower shunting cone cylinder upper end edge；Upper shunting cone cylinder and lower shunting
Cone cylinder outer wall is fixedly connected by heating agent conduit with prepolymerization inside pipe wall；
The upper end of upper shunting cone cylinder be higher than the first upper conical guide shell upper end edge, under the lower lower end and second for shunting cone cylinder
Conical flow guiding cylinder upper end edge flushes；
Circulation road under formation tube wall melt between upper spreader tube outer surface and the first inferior pyramidal water conservancy diversion tube outer surface, lower point
Circulation road under blend melt is formed between flow cone tube outer surface and the first inferior pyramidal water conservancy diversion tube outer surface；
Upper spreader tube outer surface is provided with central melt flow dividing structure, lower end and the tube wall melt of central melt flow dividing structure
Lower circulation road lower end crosses.
Sound integrated pipeline formula mixing device includes fixed -piping and batch mixing unit, and batch mixing unit includes coaxial setting
Static batch mixing pipeline and dynamic mixture pipeline, the left end of dynamic mixture pipeline are connected with the right-hand member flange of static batch mixing pipeline, are moved
It is provided with dynamic screw dividing plate in state batch mixing pipeline, axially inside direction is separated into the to dynamic screw dividing plate by dynamic mixture pipeline
One semicircle helical duct and the second semicircle helical duct, dynamic screw dividing plate coordinate with dynamic mixture inner-walls of duct gap；It is static
Static ribbon dividing plate is provided with batch mixing pipeline, static batch mixing pipeline is axially inside separated into the 3rd in direction by static ribbon dividing plate
Semicircle helical duct and the 4th semicircle helical duct, static ribbon dividing plate are fixedly connected with static batch mixing inner-walls of duct；
Plane where the both ends of dynamic screw dividing plate and static ribbon dividing plate is each perpendicular in dynamic mixture pipeline
Mandrel line, dynamic screw dividing plate right part center are provided with dynamic cone tank, and dynamic screw dividing plate left part center is provided with dynamic and pushed up
Point, static ribbon dividing plate right part center are provided with static cone tank, and static ribbon dividing plate left part center is top provided with static state, moves
The top left end of state is withstood in static cone tank；
Fixed -piping left end is connected with dynamic mixture pipeline right-hand member flange, is provided with support in fixed -piping, support is provided with
Stationary center, stationary center left end are withstood in dynamic cone tank.
The quantity of batch mixing unit is more than or equal to two groups, and flange connects between two adjacent groups batch mixing unit, one group of batch mixing unit
Static top left end withstand in the dynamic cone tank of one group of adjacent batch mixing unit, one group of batch mixing of fixed -piping and low order end
Unit connects.
The length of static batch mixing pipeline is less than the length of dynamic mixture pipeline.
Central melt flow dividing structure includes shunt cylinder and several isocons, and shunt cylinder and isocon are each provided at point
On flow cone cylinder, shunt cylinder open top, shunt cylinder upper end edge is horizontal, and isocon is wide at the top and narrow at the bottom, all isocon edges of isocon
Upper shunting cone cylinder circumferencial direction is evenly arranged, and isocon upper end connects with shunt cylinder lower end, and shunting infratubal port melts positioned at tube wall
Circulation road lower end and the outside of circulation road upper end intersection under blend melt under body.
Upper shunting cone cylinder is internally formed preheating cavity, the first inferior pyramidal guide shell and the second inferior pyramidal with lower shunting cone cylinder
Hot circulating fluid medium has been passed through in preheating cavity under being internally formed of guide shell, upper preheating cavity and lower preheating cavity；Heating agent conduit
Inner to be connected with upper preheating cavity, heating agent external catheter end is stretched out outside prepolymerization pipe.
Using above-mentioned technical proposal, PLA pre-polymerization mixing device is set to carry out batch mixing warm on the first conveying pipeline
For：Melt flows downward in prepolymerization pipe, and the melt A at prepolymerization tube hub enters shunting along upper shunting cone surface
Cylinder, melt A are flowed to circulation road lower end under tube wall melt and crossed with circulation road upper end under blend melt automatically by isocon again
The outside at place, at the same time, the melt B close to prepolymerization tube wall are entered under tube wall melt by the first upper conical guide shell
In circulation road, flow under tube wall melt and be located at melt A top behind circulation road lower end, be i.e. melt A and melt B enter blend melt
After lower circulation road, melt A is located at lower floor, and melt B is located at upper strata, when melt A and melt B are flowed under blend melt under circulation road
When bringing out mouthful, melt B is located among melt A, i.e., melt A is transformed into by center and continues to flow downward along tube wall, and melt B is by tight
Adjacent tube wall, which is transformed into center, to be continued to flow downward, and during transposition, melt A and melt B are also definitely mixed.
During melt mixed transposition, hot circulating fluid medium is passed through in upper preheating cavity and lower preheating cavity, heat is followed
Ring fluid media (medium) can add thermal medium such as according to technological requirement；Biphenyl Ether, conduction oil etc., are preheated to melt, with side
Just prepolymerization process is controlled.The present invention takes no dead angle design in the junction of all parts.From upper in a piece prepolymerization pipe
Multigroup batch mixing preheater can be installed under.
Sound integrated pipeline formula mixing device is set on the 3rd conveying pipeline, had the advantages that：In the 3rd metering
In the presence of pump, the polylactic acid melt after polymerization is entered by fixed -piping, when sticky melt passes through dynamic mixture under high pressure
When pipeline, dynamic screw dividing plate starts to rotate under the promotion of melt, the viscous melt on the inwall of dynamic mixture pipeline
The dynamic screw dividing plate rotated scrapes, diluter that melt is mixed in one among the viscous melt and dynamic mixture pipeline scraped
Rise, and push ahead into the 3rd semicircle helical duct and the 4th semicircle helical duct in static batch mixing pipeline and mixed,
Entered back into after mixing and above-mentioned mixing process is repeated in dynamic mixture pipeline, after some groups of batch mixing units, uniform poly- breast
Sour melt enters polylactic acid melt extrusion orifice plate, and polylactic acid melt is sprayed into the laggard water-filling of tape by polylactic acid melt extrusion orifice plate
It is cold, while the rotating blade of pelleter is close to polylactic acid melt extrusion orifice plate rotation, rotating blade cuts polylactic acid melt tape
It is disconnected to form polylactic acid slice.Because the first semicircle helical duct and the second semicircle helical duct are longer and be in the axial direction
The hand of spiral is set, thus can pressurized melt by when, driving dynamic screw dividing plate rotation；The rotation of dynamic screw dividing plate
The top form coordinated with cone tank top pressure of material, is not only easy to manufacture and assembles, and frictional force is smaller in rotary course,
So as to improve the efficiency of dynamic screw dividing plate scraper.The length of static batch mixing pipeline is less than the length of dynamic mixture pipeline, so
Most of length of the pipeline of whole conveying PLA can be made the king-sized PLA of the viscosity adhered on tube wall can all be scraped
Fall, fully improve the uniformity of mixing.
In summary, principle of the invention science, reasonable in design, simple in construction, it is ensured that the melt in prepolymerization pipe is constant
Flowed downward under speed state, and make the tube wall of each aspect and prepolymerization tube hub when melt flows downward in prepolymerization pipe
Solution temperature is also basically identical, so as to meet the requirement of polymerization technique.Some groups of batch mixing lists are directly set on the 3rd conveying pipeline
Member, eliminate and mixing system is installed on conveyance conduit, saved cost, reach the purpose of uniform batch mixing, convey and mixed
Material efficiency greatly improves.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of the invention for having in Fig. 1 one group of batch mixing unit；
Fig. 3 is the dimensional structure diagram of dynamic screw dividing plate in Fig. 2；
Fig. 4 is the dimensional structure diagram of static ribbon dividing plate in Fig. 2；
Fig. 5 is the structural representation of PLA pre-polymerization mixing device in Fig. 1；
Fig. 6 is the top view of the central melt flow dividing structure in Fig. 5.
Embodiment
As shown in figs 1 to 6, PLA delustring of the invention section production system, including aggregation framework 16, pelleter 17
With cooling bay 18, agitator tank 19, first poly- tank 20 and poly- tank 21 eventually, the bottom of agitator tank 19 are sequentially provided with aggregation framework 16 from top to bottom
Portion be connected by the first conveying pipeline 22 with the just top of poly- tank 20, the first conveying pipeline 22 provided with PLA pre-polymerization mixing device 40,
First autocontrol valve 23 and the first measuring pump 24, the first poly- bottom of tank 20 are connected by the second conveying pipeline 25 and the poly- top of tank 21 eventually
Connect, the second conveying pipeline 25 is provided with the second autocontrol valve 26 and the second measuring pump 27, and it is defeated to be connected with the 3rd for the poly- bottom of tank 21 eventually
Expects pipe 28, the 3rd measuring pump 29 is sequentially provided with along melt flows direction on the 3rd conveying pipeline 28 and sound integrated pipeline formula batch mixing fills
31 are put, the discharging opening of the 3rd conveying pipeline 28 is connected with the polylactic acid melt extrusion orifice plate 32 above cooling bay 18, cooling bay
Cooling water is loaded with 18, the working end of pelleter 17 is located in cooling bay 18, and the discharge end of pelleter 17 is located at cooling bay 18
Outside.
Sound integrated pipeline formula mixing device 31 includes fixed -piping 1 and batch mixing unit, and batch mixing unit includes coaxial set
Static the batch mixing pipeline 2 and dynamic mixture pipeline 3 put, the right-hand member flange of the left end of dynamic mixture pipeline 3 and static batch mixing pipeline 2
Connection, is provided with dynamic screw dividing plate 4 in dynamic mixture pipeline 3, dynamic screw dividing plate 4 by dynamic mixture pipeline 3 axially inside
Direction is separated into the first semicircle helical duct 5 and the second semicircle helical duct 6, dynamic screw dividing plate 4 with dynamic mixture pipeline 3
Wall gap coordinates；Static ribbon dividing plate 7 is provided with static batch mixing pipeline 2, static ribbon dividing plate 7 is by inside static batch mixing pipeline 2
In axial direction it is separated into the 3rd semicircle helical duct 8 and the 4th semicircle helical duct 9, static ribbon dividing plate 7 and static batch mixing
The inwall of pipeline 2 is fixedly connected.
Plane where the both ends of dynamic screw dividing plate 4 and static ribbon dividing plate 7 is each perpendicular to dynamic mixture pipeline 3
Central axis, the right part center of dynamic screw dividing plate 4 are provided with dynamic cone tank 10, and the left part center of dynamic screw dividing plate 4 is provided with
Dynamically top 11, the right part center of static ribbon dividing plate 7 is provided with static cone tank 12, and the left part center of static ribbon dividing plate 7 is set
There is static state top 13, top 11 left end of dynamic is withstood in static cone tank 12.
The left end of fixed -piping 1 is connected with the right-hand member flange of dynamic mixture pipeline 3, and support 14, support 14 are provided with fixed -piping 1
Stationary center 15 is provided with, the left end of stationary center 15 is withstood in dynamic cone tank 10.
The quantity of batch mixing unit is more than or equal to two groups, and flange connects between two adjacent groups batch mixing unit, one group of batch mixing unit
Static top 13 left end withstand in the dynamic cone tank 10 of one group of adjacent batch mixing unit, the one of fixed -piping 1 and low order end
The unit connection of group batch mixing.The length of static batch mixing pipeline 2 is less than the length of dynamic mixture pipeline 3.
PLA pre-polymerization mixing device 40 includes the prepolymerization pipe 41 being arranged in vertical, and the both ends of prepolymerization pipe 41 are fixed
Be connected on the first conveying pipeline 22, or can using the first conveying pipeline 22 as prepolymerization pipe 41, in prepolymerization pipe 41 from upper and
Under it is identical at least provided with two batch mixing preheaters, all equal structures of batch mixing preheater；Prepolymerization pipe 41 can make in the present invention
Replaced with the first conveying pipeline 22；
Each batch mixing preheater includes having the first upper conical guide shell 42, second of same center line is upper conical to lead
Flow cartridge 43, the first inferior pyramidal guide shell 44, the second inferior pyramidal guide shell 45, upper shunting cone cylinder 46 and lower shunting cone cylinder 47；
The first upper conical inferior pyramidal guide shell 44 of guide shell 42 and first is upper coarse and lower fine and upper and lower permeable structures, and first
The upper conical bottom diameter of guide shell 42 is more than the second upper conical bottom diameter of guide shell 43, the second upper conical guide shell 43 and second
Inferior pyramidal guide shell 45 is up-thin-low-thick and upper and lower permeable structures, the first upper conical bottom diameter of guide shell 42 and the second epicone
The upper-end inner diameter of shape guide shell 43 is equal, the bottom diameter of the first inferior pyramidal guide shell 44 and the upper-end inner diameter of the second inferior pyramidal guide shell 45
It is equal, the first upper conical upper end outer of guide shell 42, the second upper conical lower end outer of guide shell 43, the first inferior pyramidal guide shell 44
Upper end edge and the lower end edge of the second inferior pyramidal guide shell 45 are fixedly connected with the inwall of prepolymerization pipe 41, the first upper conical water conservancy diversion
Cylinder 42 lower end edges be fixedly connected with the second upper conical upper end edge of guide shell 43, the first upper conical lower end edge of guide shell 42 and
The second upper conical upper end edge of guide shell 43 is fixedly connected, the lower end edge of the first inferior pyramidal guide shell 44 and the second inferior pyramidal water conservancy diversion
45 upper end edges of cylinder are fixedly connected；
Upper shunting cone cylinder 46 is the structure that top sharply blocks, bottom is open, lower shunting cone cylinder 47 be bottom sharply block,
The structure of open top, upper shunting cone cylinder 46 bottom diameter are equal to the lower shunting upper-end inner diameter of cone cylinder 47, upper shunting cone cylinder 46 lower end
Internal diameter is less than the internal diameter of prepolymerization pipe 41, and the upper shunting lower end edge of cone cylinder 46 is fixedly connected with lower shunting cone cylinder 47 upper end edge；On
Shunting cone cylinder 46 and the lower shunting outer wall of cone cylinder 47 are fixedly connected by heating agent conduit with the inwall of prepolymerization pipe 41；
The upper end of upper shunting cone cylinder 46 be higher than the first upper conical upper end edge of guide shell 42, the lower end of lower shunting cone cylinder 47 and
The upper end edge of second inferior pyramidal guide shell 45 flushes；
Circulation road under tube wall melt is formed between upper the shunting outer surface of cone cylinder 46 and the outer surface of the first inferior pyramidal guide shell 44
48, form circulation road 49 under blend melt between lower the shunting outer surface of cone cylinder 47 and the outer surface of the first inferior pyramidal guide shell 44；
Upper shunting cone cylinder 46 outer surface is provided with central melt flow dividing structure 50, the lower end of central melt flow dividing structure 50 and pipe
The lower end of circulation road 48 crosses under wall melt.
Central melt flow dividing structure 50 includes a shunt cylinder 51 and several isocons 52, shunt cylinder 51 and isocon 52
It is each provided in shunting cone cylinder 46, the open top of shunt cylinder 51, the upper end edge of shunt cylinder 51 is horizontal, and isocon 52 is wide at the top and narrow at the bottom,
All isocons 52 of isocon 52 are evenly arranged along the upper shunting circumferencial direction of cone cylinder 46, the upper end of isocon 52 and the lower end of shunt cylinder 51
Connection, the lower port of isocon 52 are located at the lower end of circulation road 48 and the upper end intersection of circulation road 49 under blend melt under tube wall melt
Outside.
Upper shunting cone cylinder 46 is internally formed preheating cavity 53 with lower shunting cone cylinder 47, the first inferior pyramidal guide shell 44 and the
Thermal cycle stream has been passed through in preheating cavity 54 under being internally formed of two inferior pyramidal guide shells 45, upper preheating cavity 53 and lower preheating cavity 54
Body medium.Heating agent conduit is inner to be connected with upper preheating cavity 53, and heating agent external catheter end is stretched out outside prepolymerization pipe.Heating agent conduit is to upper
Hot circulating fluid medium in preheating cavity 53 carries out circulation water conservancy diversion, and plays and shunt cone cylinder 46 and lower shunting cone cylinder in support positioning
47 effect.Wherein heating agent conduit does not illustrate in figure comes.
The progress batch mixing warm of setting PLA pre-polymerization mixing device 40 is on the first conveying pipeline：Melt is in prepolymerization
Flowed downward in pipe 41, the melt A at the center of prepolymerization pipe 41 enters shunt cylinder 51, melt A along upper shunting cone cylinder 46 surface
Flow to the intersection of the lower end of circulation road 48 and the upper end of circulation road 49 under blend melt under tube wall melt automatically by isocon 52 again
Outside, at the same time, the melt B close to the tube wall of prepolymerization pipe 41 enters tube wall melt by the first upper conical guide shell 42
In lower circulation road 48, flow under tube wall melt and be located at melt A top behind the lower end of circulation road 48, be i.e. melt A and melt B enter mixed
Close under melt after circulation road 49, melt A is located at lower floor, and melt B is located at upper strata, when melt A and melt B are flowed under blend melt
When the lower end of circulation road 49 exports, melt B is located among melt A, i.e. melt A is transformed into from center to be continued to dirty along tube wall
Dynamic, melt B continues to flow downward by being transformed into center close to tube wall, and during transposition, melt A and melt B have also carried out one
Surely mix.The flow direction for being oriented to melt A of hollow arrow in Fig. 5, the flow direction for being oriented to melt B of filled arrows.
During melt mixed transposition, hot circulating fluid medium is passed through in upper preheating cavity 53 and lower preheating cavity 54,
Hot circulating fluid medium can add thermal medium such as according to technological requirement；Biphenyl Ether, conduction oil etc., are preheated to melt,
To facilitate control prepolymerization process.The present invention takes no dead angle design in the junction of all parts.A piece prepolymerization pipe 41
Multigroup batch mixing preheater can be inside installed from top to bottom.
Sound integrated pipeline formula mixing device 31 is set on the 3rd conveying pipeline 28, had the advantages that：The 3rd
In the presence of measuring pump 29, the PLA after polymerization is entered by fixed -piping 1, when sticky melt is mixed by dynamic under high pressure
When pipe material 3, dynamic screw dividing plate 4 starts to rotate under the promotion of melt, sticky on the inwall of dynamic mixture pipeline 3
The dynamic screw dividing plate 4 that melt is rotated scrapes, diluter that melt mixes among the viscous melt and dynamic mixture pipeline 3 scraped
Together, and push ahead into the 3rd semicircle helical duct 8 and the 4th semicircle helical duct 9 in static batch mixing pipeline 2
Row mixing, enters back into after mixing and above-mentioned mixing process is repeated in dynamic mixture pipeline 3, after some groups of batch mixing units,
Even polylactic acid melt enters polylactic acid melt extrusion orifice plate 32, and polylactic acid melt is sprayed into band by polylactic acid melt extrusion orifice plate 32
The laggard water-filling of bar is cold, and after water cooling is solidified to normal temperature, section operation is carried out through pelleter 17.Due to the He of the first semicircle helical duct 5
Second semicircle spiral logical 6 is longer and is set in the axial direction for the hand of spiral, thus can pressurized melt by when,
Driving dynamic screw dividing plate 4 rotates；The top form coordinated with cone tank top pressure of rotary material of dynamic screw dividing plate 4, not only
Easily fabricated and assembling, and frictional force is smaller in rotary course, so as to improve the efficiency of the scraper of dynamic screw dividing plate 4.It is quiet
The length of state batch mixing pipeline 2 is less than the length of dynamic mixture pipeline 3, can so make whole 3rd conveying pipeline 28（By static batch mixing
Pipeline 2 and dynamic mixture pipeline 3 form）Most of length the king-sized PLA of the viscosity adhered on tube wall can all be scraped
Fall, fully improve the uniformity of mixing.
The section making process step of the present invention is as follows：
（1）, by mass fraction be 0.2%~3%（It is preferred that 1%）Titanium dioxide（TiO2）It is added to solvent（Participate in polymerization
Catalyst, stabilizer equal solvent）In fully fusion turn into suspension, suspension is injected into agitator tank 19, while to stirring
The lactide melt after injection melting in tank is mixed, agitator tank work is opened, stirs 20~40min of melt, after well mixed
Stop stirring；
（2）, open the first autocontrol valve 23 of agitator tank 19 bottom, lactide melt is mixed by the first measuring pump 24
Compound drops into through the first conveying pipeline 22 just carries out preliminary polymerization operation in poly- tank 20, preliminary polymerization operation be temperature be 100~
150 DEG C, the time of preliminary polymerization operation is 1~2h, pressure 0.2MPa, after preliminary polymerization operation, lactide, titanium dioxide and
The mixture of solvent is aggregated into as sticky polylactic acid melt；
（3）, open just the poly- bottom of tank 20 the second autocontrol valve 26, polylactic acid melt is passed through by the second measuring pump 27
Second conveying pipeline 25 drops into the final polymerization operation of the interior progress of poly- tank 21 eventually, and final polymerization operation is that temperature is 150~280 DEG C,
The time of final polymerization operation is 1~6h, pressure 0.3MPa；
（4）, open the 3rd autocontrol valve of the poly- bottom of tank 21 eventually, the polylactic acid melt in poly- tank 21 is through the 3rd conveying eventually
Pipe 28 is discharged, and the 3rd conveying pipeline 28 is provided with the 3rd measuring pump 29 and sound integrated pipeline formula mixing device 31, the 3rd measuring pump
29 provide the power of metering, filtering and conveying for polylactic acid melt, and sound integrated pipeline formula mixing device 31 is to polylactic acid melt
Mixed, clean, well mixed polylactic acid melt is extruded as band strip by polylactic acid melt extrusion orifice plate 32, then right
Polylactic acid melt carries out water cooling；
（5）, polylactic acid melt water cooling is solidified to operation pelleter 17 after normal temperature and carries out section operation.
Using the production technology of the present invention, according to fiber properties, the present invention adds certain proportion in poly-lactic acid material
（0.2%~3%）Fiber grade titanium dioxide（TiO2）, the feel for the fiber that polylactic acid slice is produced, which has, significantly to be changed
It is kind, it is larger to have light（Not plus TiO2）The obvious soft many of acid fiber by polylactic.Secondly, dyeing kinetics substantially reduce, and dyeing is equal
Even property is improved.
The present embodiment is not that the shape to the present invention, material, structure etc. make any formal limitation, every according to this hair
Any simple modification, equivalent change and modification that bright technical spirit is made to above example, belongs to the technology of the present invention side
The protection domain of case.
Claims (6)
- The production system 1. PLA delustring is cut into slices, it is characterised in that：Including aggregation framework, pelleter and cooling bay, aggregation framework On be sequentially provided with agitator tank, first poly- tank from top to bottom and poly- tank, stirring pot bottom pass through the first conveying pipeline and first poly- tank top eventually Connection, the first conveying pipeline are provided with PLA pre-polymerization mixing device, the first autocontrol valve and the first measuring pump, first poly- pot bottom It is connected by the second conveying pipeline with poly- tank top eventually, the second conveying pipeline is provided with the second autocontrol valve and the second measuring pump, eventually Poly- pot bottom is connected with the 3rd conveying pipeline, and the 3rd measuring pump and sound one are sequentially provided with along melt flows direction on the 3rd conveying pipeline Body duct type mixing device, the discharging opening of the 3rd conveying pipeline are connected with the polylactic acid melt extrusion orifice plate above cooling bay, Cooling water is loaded with cooling bay, the working end of pelleter is located in cooling bay, and the discharge end of pelleter is located at outside cooling bay；PLA pre-polymerization mixing device includes the prepolymerization pipe that is arranged in vertical, in prepolymerization pipe from top to bottom at least provided with Two batch mixing preheaters, all equal structures of batch mixing preheater are identical；Each batch mixing preheater include the first upper conical guide shell with same center line, the second upper conical guide shell, First inferior pyramidal guide shell, the second inferior pyramidal guide shell, upper shunting cone cylinder and lower shunting cone cylinder；First upper conical guide shell and the first inferior pyramidal guide shell are upper coarse and lower fine and upper and lower permeable structures, and first upper conical leads Flow cartridge bottom diameter is more than the second upper conical guide shell bottom diameter, and the second upper conical guide shell and the second inferior pyramidal guide shell are equal For up-thin-low-thick and upper and lower permeable structures, the first upper conical guide shell bottom diameter and the second upper conical guide shell upper-end inner diameter phase Deng the first inferior pyramidal guide shell bottom diameter is equal with the second inferior pyramidal guide shell upper-end inner diameter, on the first upper conical guide shell Hold under outer, the second upper conical guide shell lower end outer, the first inferior pyramidal guide shell upper end edge and the second inferior pyramidal guide shell End edge edge is fixedly connected with prepolymerization inside pipe wall, the first upper conical guide shell lower end edge and the second upper conical guide shell upper end Edge is fixedly connected, and the first upper conical guide shell lower end edge is fixedly connected with the second upper conical guide shell upper end edge, and first Inferior pyramidal guide shell lower end edge is fixedly connected with the second inferior pyramidal guide shell upper end edge；Upper shunting cone cylinder is the structure that top sharply blocks, bottom is open, and lower shunting cone cylinder sharply blocks for bottom, open top Structure, upper shunting cone cylinder bottom diameter is equal to lower shunting cone cylinder upper-end inner diameter, and upper shunting cone cylinder bottom diameter is less than prepolymerization Bore, upper shunting cone cylinder lower end edge are fixedly connected with lower shunting cone cylinder upper end edge；Upper shunting cone cylinder and lower shunting cone cylinder Outer wall is fixedly connected by heating agent conduit with prepolymerization inside pipe wall；The upper end of upper shunting cone cylinder is higher than the first upper conical guide shell upper end edge, the lower end of lower shunting cone cylinder and the second inferior pyramidal Guide shell upper end edge flushes；Circulation road under tube wall melt, lower spreader are formed between upper spreader tube outer surface and the first inferior pyramidal water conservancy diversion tube outer surface Circulation road under blend melt is formed between tube outer surface and the first inferior pyramidal water conservancy diversion tube outer surface；Upper spreader tube outer surface is provided with central melt flow dividing structure, and lower end and the tube wall melt of central melt flow dividing structure flow down Passage lower end crosses.
- The production system 2. PLA delustring according to claim 1 is cut into slices, it is characterised in that：Sound integrated pipeline formula batch mixing Device includes fixed -piping and batch mixing unit, and batch mixing unit includes static the batch mixing pipeline and dynamic mixture pipe of coaxial setting Road, the left end of dynamic mixture pipeline are connected with the right-hand member flange of static batch mixing pipeline, and dynamic screw is provided with dynamic mixture pipeline Dividing plate, by dynamic mixture pipeline, axially inside direction is separated into the first semicircle helical duct and the second semicircle to dynamic screw dividing plate Helical duct, dynamic screw dividing plate coordinate with dynamic mixture inner-walls of duct gap；Be provided with static batch mixing pipeline static ribbon every Plate, by static batch mixing pipeline, axially inside direction is separated into the 3rd semicircle helical duct and the 4th semicircle spiral shell to static ribbon dividing plate Passage is revolved, static ribbon dividing plate is fixedly connected with static batch mixing inner-walls of duct；Plane where the both ends of dynamic screw dividing plate and static ribbon dividing plate is each perpendicular to the central shaft of dynamic mixture pipeline Line, dynamic screw dividing plate right part center are provided with dynamic cone tank, and dynamic screw dividing plate left part center is top provided with dynamic, quiet State helical baffle right part center is provided with static cone tank, and static ribbon dividing plate left part center is provided with static top, dynamic top Sharp left end is withstood in static cone tank；Fixed -piping left end is connected with dynamic mixture pipeline right-hand member flange, and support is provided with fixed -piping, and support, which is provided with, to be fixed Top, stationary center left end is withstood in dynamic cone tank.
- The production system 3. PLA delustring according to claim 2 is cut into slices, it is characterised in that：The quantity of batch mixing unit is more than Equal to two groups, flange connects between two adjacent groups batch mixing unit, and the static top left end of one group of batch mixing unit withstands on adjacent one In the dynamic cone tank of group batch mixing unit, one group of batch mixing unit connection of fixed -piping and low order end.
- 4. the PLA delustring section production system according to Claims 2 or 3, it is characterised in that：Static batch mixing pipeline Length is less than the length of dynamic mixture pipeline.
- The production system 5. PLA delustring according to claim 1 is cut into slices, it is characterised in that：Central melt flow dividing structure bag A shunt cylinder and several isocons are included, shunt cylinder and isocon are each provided in shunting cone cylinder, shunt cylinder open top, point Flow cartridge upper end edge is horizontal, and isocon is wide at the top and narrow at the bottom, and all isocons of isocon are evenly arranged along upper shunting cone cylinder circumferencial direction, Isocon upper end connects with shunt cylinder lower end, and shunting infratubal port is located at circulation road lower end under tube wall melt and flowed down with blend melt The outside of passage upper end intersection.
- The production system 6. PLA delustring according to claim 5 is cut into slices, it is characterised in that：Upper shunting cone cylinder and lower shunting Cone cylinder is internally formed preheating cavity, preheating cavity under being internally formed of the first inferior pyramidal guide shell and the second inferior pyramidal guide shell, Hot circulating fluid medium has been passed through in upper preheating cavity and lower preheating cavity；Heating agent conduit is inner to be connected with upper preheating cavity, and heating agent is led Pipe outer end is stretched out outside prepolymerization pipe.
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| CN201610233623.2A CN105818291B (en) | 2016-04-15 | 2016-04-15 | PLA delustring section production system |
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| WO2011031251A1 (en) * | 2009-09-10 | 2011-03-17 | International Fibers, Ltd. | Apparatus and process for preparing superior carbon fibers |
| CN204138830U (en) * | 2014-10-14 | 2015-02-04 | 河南省龙都生物科技有限公司 | Melt pipe dislocation docking unit blender |
| CN105463588B (en) * | 2016-01-11 | 2018-02-16 | 河南省龙都生物科技有限公司 | Bamboo charcoal polylactic acid melt direct spinning |
| CN205522079U (en) * | 2016-04-15 | 2016-08-31 | 河南省龙都生物科技有限公司 | Polylactic acid extinction section production system |
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