CN103868337A - Dehydration and drying apparatus and method for producing polymer - Google Patents
Dehydration and drying apparatus and method for producing polymer Download PDFInfo
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- CN103868337A CN103868337A CN201310688337.1A CN201310688337A CN103868337A CN 103868337 A CN103868337 A CN 103868337A CN 201310688337 A CN201310688337 A CN 201310688337A CN 103868337 A CN103868337 A CN 103868337A
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Abstract
A dehydration and drying apparatus of the invention (1) is provided with a centrifugal dehydration machine (2), a swirling air-flow dryer (5) and a wet powder feeder (4). The wet powder feeder (4) comprises an outer cylinder (41); an inlet port (42); a spiral blade (43) conveying wet powder to the swirling air-flow dryer (5); a sliding base (46) having a spiral fixing portion (45) fixing an end of a shaft of the spiral blade (43); and a slide rail (44) for the sliding base (46) to slide along the direction of the shaft of the spiral blade (43).
Description
Technical field
The present invention relates to the manufacture method of a kind of dewatering drying device and polymer, specifically, relate to and a kind of the aqueous medium that comprises polymer being dewatered and dry dewatering drying device and use the polymers manufacturing method of this dewatering drying device.
Background technology
For the polymer that utilizes suspension polymerization to obtain in aqueous solvent, after finishing, polymerization conventionally use pure water etc. to clean, reclaim as powder through the dehydration of dewaterer and the drying steps of drying machine thereafter.
Contain moisture although carried out the described polymer of cleaning treatment and processed, because obtained polymer is hydrophobicity, so this moisture major part is surface attachment water.Therefore,, in the dry processing after processed, if there is the heated air that is enough to remove surface attachment water, can amount of moisture be reduced to target moisture content with the shorter time.
For the processed in order to carry out Separation of Solid and Liquid after cleaning treatment, generally can use centrifugal dehydrator.In the time of dry processing, can use gyration airflow drying machine or mobile groove drying machine as Patent Document 1.In addition,, about the device that quantitatively wet-milling is supplied to drying machine, can use the single axle helical conveyer that possesses urceolus and helical blade as shown in patent documentation 2.
[prior art document]
Patent documentation 1: International Patent Application Publication " WO97/24570 ", July 10 1997 International Publication day.
Patent documentation 2: Japanese Utility Model login bulletin " No. 3044092 communique ", distribution on December 12nd, 1997.
Summary of the invention
[problem to be solved by this invention]
In the time carrying out above-mentioned processed and dry processing, if dewaterer and drying machine are separately set individually, just need floor space to a certain degree.In addition the conveyance passage during from dewaterer to drying machine conveyance, dewaterer and drying machine is set individually owing to being separately, so can be likely also the distance of growing by the wet-milling that has completed processed.Therefore,, in conveyance passage, wet-milling likely can make described passage stop up.In addition,, in the time using pneumatic drier or fluidized bed drying machine, need large-scale and complicated machine depending on the treating capacity of powder.Large-scale and complicated machine has the situation that is difficult to cleaning robot inside, and this may cause the delay of powder.If powder is trapped in machine, can produce delay residue, therefore, in the time using uniform machinery to produce other product things, there are the misgivings of sneaking into different product things and pollution occurs.
In addition,, in above-mentioned single axle helical conveyer, because the formation particle diameter of wet-milling is thinner, therefore the gap of urceolus and helical blade is typically designed to 2～3mm.In the time that switching is supplied to the kind of drying machine, need be by the dismounting of described single axle helical conveyer and again assembled after cleaning.When carrying out this while assembling, if the skew of the central shaft of the center of urceolus and helical blade, urceolus and helical blade will be in contact with one another again.In general,, because urceolus is metal system, if therefore urceolus and helical blade are interfered mutually, urceolus inside will be cut by helical blade and be produced metal powder.Therefore,, in the time that wet-milling is supplied to drying machine, the metal powder producing is just likely sneaked into polymer.
The present invention completes in view of described problem points, its object is to provide a kind of simple structure and can carries out with same device the production of many product thing, and the dewatering drying device of easily dismantling and cleaning in the time that product thing switches and the polymers manufacturing method that uses this dewatering drying device.
[technical scheme of dealing with problems]
In order to solve described problem, dewatering drying device of the present invention is that the mixture of polymer and aqueous medium is dewatered and dry dewatering drying device, and there is following formation, comprise: dewaterer, dewaters to the mixture of described polymer and aqueous medium; Drying machine, is dried the described polymer dewatering by described dewaterer; And wet-milling supplying machine, the described polymer dewatering by described dewaterer is supplied to described drying machine, and there is the helical blade that one end of axle is fixed; Described drying machine is arranged on the other end direction of the axle of the described helical blade of described wet-milling supplying machine, and described wet-milling supplying machine comprises: urceolus; Input port, is arranged on described urceolus, and the described polymer dewatering by described dewaterer is fed in described wet-milling supplying machine; Described helical blade, is arranged on the inside of described urceolus, and by the described polymer conveyance dropping into from described input port to described drying machine; Glide base, has the spiral fixed part of described one end of the axle of fixing described helical blade; And slide rail, make the square upward sliding of described glide base at the axle along described helical blade.
[effect of invention]
Dewatering drying device of the present invention comprises the wet-milling feedway of easily dismantling and assembling under dewaterer, thus, and dismounting and cleaning can easily carry out kind switching time.
Accompanying drawing explanation
Fig. 1 is the structural representation of the dewatering drying device of embodiment of the present invention.
Fig. 2 is the structural representation of the wet-milling supplying machine that possesses of the dewatering drying device of embodiment of the present invention.
Fig. 3 is the structural representation of the centrifugal dehydrator that possesses of the dewatering drying device of embodiment of the present invention.
[explanation of Reference numeral]
1-dewatering drying device
11-supply pipe
12-drops into pipe
2-centrifugal dehydrator (dewaterer)
20-wet-milling outlet
21-slurry supply port (supply port)
22-drench pit
23-rotating shaft
24-dispersion plate
25-sieves (solid-liquid separation membrane)
26-scraping machine (scraping unit)
27-fixes tool
28-housing
29-discharge outlet
3-wet-milling storage tank
4-wet-milling supplying machine
41-urceolus
42-input port
43-helical blade
44-slide rail
45-spiral fixed part
46-glide base
5-gyration airflow drying machine
51-wet-milling supply port
52-outlet
The specific embodiment
Below, based on Fig. 1～Fig. 2, an embodiment of centrifugal dehumidifier of the present invention is described.
The dewatering drying device of present embodiment, in order to having manufactured after polymer through suspension polymerization, dewaters and is dried the aqueous medium that contains polymer (hereinafter referred to as slurry), thereby reclaim polymer from slurry.
About the polymer obtaining through suspension polymerization, can enumerate vinylidene fluoride polymer, vinylidene chloride polymer, vinyl chloride-base polymer, vinyl acetate polymer, styrene polymer and methylmethacrylate polymer etc. herein.In addition, it is foraflon that vinylidene fluoride polymer is not limit, and also comprises vinylidene fluoride copolymer.About the comonomer except vinylidene fluoride for forming vinylidene fluoride copolymer, can enumerate hexafluoropropene, CTFE, tetrafluoroethene and perfluoroalkyl vinyl ether (perfluoroalkyl vinyl ether) etc.Equally, it is vinylidene chloride homopolymers that vinylidene chloride polymer is not limit, and also comprises vinylidene chloride copolymer.About the comonomer except vinylidene chloride for forming vinylidene chloride copolymer, can enumerate vinyl chloride, acrylonitrile, vinyl acetate, acrylic acid, methacrylic acid, itaconic acid, (methyl) alkyl acrylate and itaconic acid Arrcostab etc.Wherein, the dewatering drying device of present embodiment can be applicable to vinylidene fluoride polymer and vinylidene chloride polymer preferably.
In the following description, use pure water etc. cleans the vinylidene fluoride polymer obtaining through suspension polymerization, and the slurry obtaining after cleaning is supplied to dehydration process steps and dry treatment step.But the use of dewatering drying device of the present invention is not limited thereto, can be applicable to above-mentioned polymer.Herein, aqueous medium contained in slurry refers to water, preferably ion exchange water.But aqueous medium also can comprise as the organic solvent of chain-transferring agent or as the halogenated hydrocarbon solvent of the solvent of polymerization initiator.
(about dewatering drying device 1)
Fig. 1 is the structural representation of the dewatering drying device 1 of present embodiment.As shown in Figure 1, dewatering drying device 1 possesses centrifugal dehydrator (dewaterer) 2, supply pipe 11, wet-milling storage tank 3, drops into pipe 12, wet-milling supplying machine 4 and gyration airflow drying machine (drying machine) 5.
(centrifugal dehydrator)
In present embodiment, use centrifugal dehydrator as dewaterer, but the present invention is not limited thereto.
As shown in Figure 1, centrifugal dehydrator 2 possesses slurry supply port 21 at the upside along vertical (hereinafter referred to as " vertical top "), and is connected with supply pipe 11 at the downside along vertical (hereinafter referred to as " vertical below ").
Fig. 3 is the structural representation of the centrifugal dehydrator 2 of present embodiment.As shown in Figure 3, centrifugal dehydrator 2 possesses in its housing 28: rotating shaft 23; Drench pit 22, is arranged on rotating shaft 23; Sieve 25, along the inner wall arrangement of drench pit 22; And dispersion plate 24, be arranged on the inside of drench pit 22, and supplied with slurry is disperseed towards sieve 25.Slurry supply port 21 arranges in the mode of supplying with slurry towards dispersion plate 24.In addition, in the inside of drench pit 22, scraping machine 26 is being set, these scraping machine 26 scrapings are dispersed plate 24 and disperse and be attached to the material of sieve on 25.
Drench pit 22 is mounted in has a round-ended cylinder shape groove on rotating shaft 23, and it rotates centered by rotating shaft 23.The side of drench pit 22 is arranging to be used so that multiple apertures that liquid component flows out to the outside of drench pit 22.At the inwall of the side of drench pit 22, the sieve 25 that the solid constituent that makes in slurry separates with liquid component is installed.The details of sieve 25 will be narrated below.In addition,, in the bottom surface of drench pit 22, wet-milling outlet 20 is being set.The wet-milling obtaining by the dehydration of centrifugal dehydrator 2, is supplied to supply pipe 11 via wet-milling outlet 20.
Rotating shaft 23 is axles that drench pit 22 is rotated, and its rotation is controlled by not shown drive unit.Rotating shaft 23 connects to drench pit 22, and therefore its upper end is positioned at drench pit 22.In the upper end of rotating shaft 23, by fixing tool 27, dispersion plate 24 is installed.The centrifugal dehydrator 2 of present embodiment, can dewater with the rotary speed of for example 1100rpm.But rotary speed is also unrestricted, can suitably determine depending on the slurry of dehydration object.
Slurry supply port 21 is the vertical belows from drench pit 22 by the slurry that will dewater, and is supplied to the supply port in drench pit 22.Slurry supply port 21 be arranged on rotating shaft 23 roughly directly over, and facing to vertical lower opening.On the top of rotating shaft 23, dispersion plate 24 is installed, therefore slurry is supplied to dispersion plate 24 from slurry supply port 21.
Dispersion plate 24, is the parts that the slurry of supplying with from slurry supply port 21 is disperseed towards periphery, and it is arranged on the upper end of rotating shaft 23 by fixing tool 27.Therefore, dispersion plate 24 rotates by rotating shaft 23.Dispersion plate 24 in present embodiment is the parts with following structure: vertical cross-section is the cone-shaped to downside expansion.Particularly, dispersion plate 24 has frustum shape.Disperse towards sieve 25 as long as dispersion plate 24 can make to be supplied to the slurry of dispersion plate 24, to be not limited to be frustum to its structure.In addition, in this manual, so-called vertical cross-section refers to along vertical and cuts down the cut surface forming.
Fixing tool 27 is fixed on dispersion plate 24 on rotating shaft 23, and is arranged on the upper face center portion of dispersion plate 24.In addition, the upper section of fixing tool 27 is: the cone shape that has summit above vertical.Therefore, be first to touch fixing tool 27 from slurry supply port 21 to the slurry dropping under roughly, then along the side of cone, self-retaining tool 27 on dispersion plate 24 and all around being dispersed to.The slurry that thus, can make the inwall from dispersion plate 24 to drench pit 22 supply with is able to better dispersion.In addition, the side of cone and the inclined plane of dispersion plate 24 of fixing tool 27 can be mutually continuous, also can be discontinuous.In addition, fixing tool 27 also can be integrally formed with dispersion plate 24.In addition, only otherwise hinder the supply slurry to dispersion plate 24, it is cone that the shape of fixing tool 27 is also not limited to, for example, also can be tabular.
Sieve 25, in order to utilize centrifugal force that the solid constituent in slurry is separated with liquid component at the inwall of drench pit 22, is the solid-liquid separation membrane that carries out centrifugal filtration.Sieve 25 be arranged on the inwall of side of drench pit 22 all on.Sieve 25 in present embodiment is metal sieves, is more specifically stainless steel sift.If adopt the sieves such as polyacrylic felt, have filter cloth burst forth and cause the filter cloth bursting forth to sneak into the suffering of goods (vinylidene fluoride polymer), but metal sieve just can not produce this problem.In addition,, even if sneak into goods just in case the part of metal sieve is damaged, also can be for example more easily find tramp material according to the difference of color etc. than the situation of sneaking into the sieves such as polypropylene felt.
Width of mesh and the knitmesh shape of sieve 25, can suitably set according to the particle diameter of the vinylidene fluoride polymer comprising in the slurry that will dewater.The knitmesh shape here refers to, sieve 25 is plain cloth or twills.So-called plain cloth refers to: form the warp of sieve 25 and parallel with fixed intervals, and weave according to the mode of intersecting one by one the shape forming.In addition, so-called twills refer to: the warp of formation sieve 25 and parallel are in mutually keeping fixed intervals, and at least one party of warp and parallel weaves according to more than two the opposing party's that shuttles back and forth mode the shape forming.
If the average grain diameter (median particle diameter) of the powder of the vinylidene fluoride polymer obtaining through suspension polymerization is 20 μ m～500 μ m, preferably using mesh is the plain cloth sieve of 20～150 μ m, particularly preferably uses the plain cloth sieve of 50～150 μ m.If mesh is excessive, polymer also can together pass sieve with liquid component, thereby the recovery of polymer there will be loss.In addition, if mesh is too small, drainage is poor, can not suitably complete dehydration.In addition, even if mesh is 20～150 μ m, if use twills sieve, compare so with the situation of the plain cloth sieve that uses same width of mesh, polymer, in the more heterogeneity of adhering to of sieving on 25, consequently easily produces abnormal vibrations.Therefore, the preferred plain cloth of fabric form of sieve 25.In addition, having formed after the cake layer of polymer on the surface of sieve 25 by processed, even if particle diameter is less than the polymer of mesh, its major part is also caught by sieve 25.
As mentioned above, drench pit 22 rotates by rotating shaft 23, and can the slurry that be supplied to drench pit 22 inside be pressed into along on the sieve 25 of inner wall arrangement by centrifugal force.Sieved 25 polymer and the liquid components that are divided into as solid constituent by centrifugal force by the slurry being pressed on sieve 25.Liquid component is through sieve 25, and solid constituent is trapped on sieve 25, realizes thus processed.
, be provided with dispersion plate 24 in drench pit 22 herein, the slurry that be implemented processed is supplied to dispersion plate 24 from slurry supply port 21.Dispersion plate 24 can make to supply with the slurry of coming to be disperseed towards sieve 25.Thus, can avoid slurry to be only attached to certain specific place of sieve 25, thereby can suitably keep drench pit 22 weight balancing when rotated.
Discharge outlet 29 is discharged the liquid producing through processed to outside.
Having used in the dehydration of centrifugal dehydrator 2, slurry is dewatered and is divided into vinylidene fluoride polymer and the liquid component as solid constituent.Isolated liquid component is discharged from discharge outlet 29.
Scraping portion 26 moves towards vertical below along sieve 25, and scraping is trapped in the solid constituent on sieve 25 thus.Scraping portion 26 is mobile towards vertical below, thereby is trapped in the solid constituent sieve 25 from sieving 25 scrapings, and this solid constituent is extruded into wet-milling outlet 20.
In addition, not separate with liquid component completely as the vinylidene fluoride polymer of solid constituent, but the wet-milling that contains a little moisture.The moisture major part containing in this wet-milling is surface attachment water.Make the moisture content of described wet-milling reach target moisture content in order to reduce water content, and reclaimed in the mode of powder, and then need to be dried treatment step.
Supply pipe 11, by the wet-milling obtaining by the dehydration of centrifugal dehydrator 2, is supplied to the wet-milling storage tank 3 of the vertical below that is arranged on supply pipe 11.
Dewater through dehydration with centrifugal dehydrator 2 and be trapped in the wet-milling on sieve 25, be pressed against wet-milling outlet 20 by scraping portion 26 scrapings, and via being connected to the supply pipe 11 of vertical below storage to the wet-milling storage tank 3 being arranged on below the vertical of supply pipe 11.
(wet-milling storage tank)
Wet-milling storage tank 3 is preserved through centrifugal dehydrator 2 and has been completed dehydration and wet-milling after dewatering.As shown in Figure 1, below the vertical of wet-milling storage tank 3, connecting and dropping into pipe 12.Drop into pipe 12 in order to the wet-milling that is housed in wet-milling storage tank 3 is fed into wet-milling supplying machine 4.The wet-milling that is housed in wet-milling storage tank 3 is fed into wet-milling supplying machine 4 via dropping into pipe 12.Wet-milling storage tank 3 is controlled, thereby will throw to wet-milling input amount wet-milling supplying machine 4, time per unit and be controlled to fixed amount via dropping into pipe 12.
(wet-milling supplying machine)
Wet-milling supplying machine 4 is conveying worms, and it will drop into the wet-milling of coming from wet-milling storage tank 3, is supplied to the gyration airflow drying machine 5 arranging facing to the X direction of wet-milling supplying machine 4.As shown in the single-point line of Fig. 1, wet-milling supplying machine 4 comprises urceolus 41, helical blade 43, slide rail 44 and is provided with the glide base 46 of spiral fixed part 45.
(about helical blade 43)
In the structure of helical blade 43, comprise axle and helically and be arranged on this axial blade part.The mode that helical blade 43 is level with its axle is arranged on the inside of urceolus 41, and take self center as rotating shaft is rotated, thereby the wet-milling that is fed into urceolus 41 inside is supplied to gyration airflow drying machine 5.In addition, the spiral fixed part 45 that one end of the axle of helical blade 43 possesses by glide base 46 is fixed, and realizes thus axle and fixes.By described structure, helical blade 43 is supplied to by rotatablely moving of self wet-milling that is fed into urceolus 41 inside the gyration airflow drying machine 5 that is arranged on helical blade 43 head ends (one end relative other end fixing with being subjected to axle) side.
In general, be able in the conveying worm of the fixing helical blade of axle possessing axle two ends, conveyance object is to discharge to the direction vertical with the direction of principal axis of helical blade.On the other hand, by adopting the above-mentioned organization plan that has possessed axle one end and be subjected to the fixing helical blade of axle, conveyance object (wet-milling) can be discharged along the direction of principal axis of helical blade.
About the shape of helical blade 43, the long axis direction length L of helical blade 43 is with respect to the ratio of the diameter D of helical blade 43, the value of L/D is preferably greater than 5 and be less than 15, more preferably 10 left and right.In addition, the diameter D of so-called helical blade 43, not only comprises the shaft diameter of helical blade 43, also comprises the external diameter of blade part.
In the time that the value of L/D is greater than 5, just can obtain the sufficient conveyance space that wet-milling is supplied to gyration airflow drying machine 5.In addition, fix because one end of the axle of helical blade 43 has been subjected to axle, if therefore the value of L/D is less than 15, the head end that just can suppress helical blade 43 is bending because of deadweight, contacts with helical blade 43 thereby suppress urceolus 41.
Therefore, by the value of L/D is made as to 10 left and right, just can guarantee in the urceolus of wet-milling supplying machine 4 41 inside the sufficient space to gyration airflow drying machine 5 by wet-milling conveyance, can suppress again the bending of the head end of helical blade 43.
(about glide base and slide rail)
Fig. 2 is the figure that is described in more detail the structure of wet-milling supplying machine 4.By making long axis direction (in Fig. 2 direction four-headed arrow A shown in) upper slide of glide base 46 at slide rail 44, and helical blade 43 is moved.As shown in Figure 2, possess and have spiral fixed part 45 at the upper surface of glide base 46, spiral fixed part 45 is fixed on glide base 46.In addition, one end of the axle of spiral fixed part 45 to helical blade 43 imposes axle and fixes.Spiral fixed part 45 possesses the not shown rotation control parts such as motor, thereby controls the direction of rotation and the rotary speed that have been able to the fixing helical blade 43 of axle.
As shown in Figure 1, in the time that needs use wet-milling supplying machine 4, the mode that is all accommodated in urceolus 41 inside with helical blade 43 is slided glide base 46.In addition, glide base 46 possesses not shown pedestal fixed part.In the use procedure of wet-milling supplying machine 4, glide base 46 is fixed on slide rail 44 by pedestal fixed part, therefore can not produce skew because rotatablely moving of helical blade 43 causes the position of glide base 46.In addition, spiral fixed part 45 interfixes by not shown flange part with urceolus 41.
In addition,, in the time that needs are dismantled wet-milling supplying machine 4 and cleaned, glide base 46 is slided as shown in Figure 2.That is, make the direction of glide base 46 along the rotating shaft of helical blade 43, and towards helical blade 43 be able to fixing distolateral slip of axle, thereby helical blade 43 is exposed from one end of urceolus 41.Now, preferably setting the working range of glide base 46 meets the following conditions: the head end of the helical blade 43 exposing from urceolus 41, and described one end of urceolus 41 between distance d be 10cm～50cm.In the present embodiment, set the working range of glide base 46 for following mode: the head end of the helical blade 43 exposing from urceolus 41, and described one end of urceolus 41 between distance d be 30cm.
More than will being made as 10cm apart from d, just can guarantee urceolus 41 inside of wet-milling supplying machine 4 to carry out the sufficient room of washing and cleaning operation.In addition,, by being made as below 50cm apart from d, can not cause dewatering drying device 1 to maximize.In addition, in general, larger apart from d, glide base 46 is easier of the horizontal direction occurrence positions skew different from glide direction., because increasing apart from d, and make the axle of helical blade 43 and urceolus 41 center easily produce skew.
Therefore,, by set the working range of glide base 46 according to the mode that is 10cm～50cm apart from d, can guarantee the sufficient room that the inside of the urceolus 41 that wet-milling supplying machine 4 is possessed is cleaned.In addition, can suppress dewatering drying device 1 and maximize, and can make the axle of helical blade 43 and urceolus 41 center be difficult to produce skew.
While again assembling wet-milling supplying machine 4 when having cleaned wet-milling supplying machine 4, the mode that is all accommodated in urceolus 41 inside with helical blade 43 is slided glide base 46.
So, possessed slide rail 44, the spiral fixed part 45 that helical blade 43 is fixed and the structure of the glide base 46 that slides by employing on slide rail 44, the device dismounting while cleaning just becomes easy.In addition, can suppress the likely position skew between axle and urceolus 41 center that produce, helical blade 43 in the time that device is assembled again.
(gyration airflow drying machine)
In the present embodiment, use gyration airflow drying machine as drying machine, but the present invention is not limited thereto, for example, also can be by flow groove drying machine or multiple field drying machine etc. as drying machine.
Gyration airflow drying machine 5 is dried supplying with the wet-milling of coming from wet-milling supplying machine 4, and it comprises: cylindrical container, has the inner space of concentric circles; Ingress pipe, is connected to the bottom of described cylindrical container, in order to import heated air; And cyclotron mechanism, make the heated air importing from described ingress pipe in described cylindrical container, form convolution ascending air.Be supplied to the wet-milling of gyration airflow drying machine 5, be moved upward below in cylindrical container by the convolution ascending air forming in cylindrical container.Wet-milling moves in way at it, not only obtains climbing power and is also subject to centrifugal force from convolution ascending air, is therefore able to size degradation and is dried with good dispersity.In addition, wet and the high wet-milling of density, its centrifugal force being subject to from described convolution ascending air is just stronger, therefore can near the internal perisporium face of cylindrical container, circle round for a long time.Therefore, wet-milling is elongated in the holdup time of cylindrical container inside, so drying regime can become well, and can realize uniformly dry.
As shown in Figure 1, gyration airflow drying machine 5 possesses wet-milling supply port 51, outlet 52.Wet-milling supply port 51 will be supplied with the wet-milling of coming from wet-milling supplying machine 4 and be supplied to the inside of gyration airflow drying machine 5.Outlet 52 is outlets that the wet-milling being dried is discharged.The powder of discharging from outlet 52 is reclaimed with powder state.
In the dewatering drying device 1 of present embodiment, by centrifugal dehydrator 2, slurry is dewatered, and the wet-milling having dewatered is preserved to the wet-milling storage tank 3 that is arranged on vertical below, and and then be fed into the wet-milling supplying machine 4 that is arranged on vertical below.Wet-milling supplying machine 4 adopts following structure: the wet-milling that input is come is supplied to the gyration airflow drying machine 5 arranging facing to horizontal direction, and makes wet-milling dry by gyration airflow drying machine 5.
Gyration airflow drying machine 5 simultaneously produces convolution ascending airs, and one side is dried the material that becomes dry object.Therefore as shown in Figure 1,, by adopting gyration airflow drying machine 5 as drying machine, the order that can make the move mode that dehydrates handling object thing move, move horizontally, rise mobile by declining changes.Therefore, the occupied area of the dewatering drying device 1 of present embodiment is less, the miniaturization of energy implement device.
(while using multiple field drying machine)
Below, as a reference example, the situation during to use multiple field drying machine describes.About other structures except drying machine, all identical with described dewatering drying device 1, therefore description thereof is omitted.The height of the multiple field drying machine of this reference example is 650cm, has the drum that diameter is 355cm.
The inside of described multiple field drying machine has possessed polylayer forest, and described polylayer forest comprises the discoid laminate of rotatable 26 laminations, and wet-milling drops down onto the laminate of vertical below by the peristome arranging on this laminate.In addition,, to each laminate, also possesses the baffle plate in order to the polymer of scraping lamination.Drop into continuously wet-milling from the input port of multiple field drying machine, and discoid laminate is rotated lentamente.By making laminate rotation, the wet-milling of lamination on laminate be by baffle plate scraping, and move to the laminate of vertical below via the peristome of this laminate.Described multiple field drying machine is to make by repeating this step that wet-milling is detained, dry device.
The water content of the powder obtaining for drying is processed meets the water content of regulation, need to send into the hot blast of 120 ℃ from the vertical below of drying machine, and the hot blast temperature of outlet is controlled to 80 ℃.
In the time cleaning the inside of multiple field drying machine, be along cylindrical shell direction, by what clean with the peristome of fixed intervals setting.But owing to being the structure with multiple laminates and multiple baffle plates, therefore, after washing and cleaning operation, likely there will be wet-milling to remain in the situation of the inside of multiple field drying machine.If wet-milling remains in the inside of multiple field drying machine, in the time carrying out the dry processing of different types of wet-milling, may sneak into residual wet-milling and produce pollution so.
In addition, multiple field drying machine is that one side makes wet-milling to the withering structure of the mobile one side in vertical below, and therefore, in the time using multiple field drying machine as drying machine, the size of dewatering drying device 1 in vertical will maximize.
In the dewatering drying device 1 of one embodiment of the present invention, by using gyration airflow drying machine 5 as drying machine, the miniaturization of energy implement device.And then, because the structure of gyration airflow drying machine 5 is simpler than the multiple field drying machine of this comparative example, therefore easily clean.
As mentioned above, dewatering drying device of the present invention is that the mixture of polymer and aqueous medium is dewatered and dry dewatering drying device, and possesses: dewaterer, dewaters to the mixture of described polymer and aqueous medium; Drying machine, is dried the described polymer after described dewaterer dehydration; Wet-milling supplying machine, is supplied to described drying machine by the described polymer after the dehydration of described dewaterer, and has the helical blade that one end of axle is fixed.It is distolateral that described drying machine is arranged on another of described axle of helical blade described in described wet-milling supplying machine.Described wet-milling supplying machine possesses: urceolus; Input port, is arranged on described urceolus, and in order to the described polymer after described dewaterer dehydration is fed in described wet-milling supplying machine; Described helical blade, is arranged on the inside of described urceolus, and by the described polymer conveyance dropping into from described input port to described drying machine; Glide base, has the spiral fixed part that the described one end of the axle to described helical blade is fixed; Slide rail, slides along the direction of the axle of described helical blade for described glide base.
According to above-mentioned scheme, the wet-milling that the mixture of polymer and aqueous medium obtains after the dehydration of dewaterer, by from being arranged on the input port wet-milling supplying machine urceolus, is fed into the inside of wet-milling supplying machine.In addition the mode that, one end of axle is able to fixing helical blade and becomes level with described axle is arranged on the inside of described urceolus.The wet-milling that is fed into described wet-milling supplying machine inside rotatablely moves by described helical blade, and supplies with to another distolateral drying machine of the axle that is arranged on described helical blade.The wet-milling that is supplied to described drying machine is dried by described drying machine, and is carried out recovery with the form of powder.
Herein, described wet-milling supplying machine possesses glide base and slide rail.Described one end of the described axle of described helical blade, is fixed on the spiral fixed part that described glide base has.By described glide base is slided along described slide rail, the mode that can expose from one end of described urceolus with described helical blade is slided.The mode that, can not be offset with the center of the described axle of described helical blade and described urceolus is slided glide base.Therefore, described wet-milling supplying machine is easy to dismounting and assembles.
Therefore,, according to above-mentioned scheme, by the wet-milling feedway that is easy to dismounting and assembles is set below dewaterer, can easily in the time that product thing switches, dismantle and clean.
In addition,, in dewatering drying device of the present invention, the long axis direction length of described helical blade is greater than 5 and be less than 15 with respect to the ratio of the diameter of described helical blade.
By above-mentioned scheme, can and then bring into play following effect: can in described wet-milling supplying machine, guarantee in order to the sufficient room to described drying machine conveyance by wet-milling, and the other end that can suppress the described helical blade that axle one end is fixed bends.
In addition, be preferably as follows scheme: the mode of exposing from one end of described urceolus with described helical blade, described glide base is towards being able to fixing described one distolateral of axle, and on described slide rail, slide to one end of described slide rail along the direction of the described axle of described helical blade, and in the time that described glide base has slided into described one end of described slide rail, the distance of the described other end of the described helical blade exposing from described urceolus and described one end of described urceolus is 10cm～50cm.
According to above-mentioned scheme, and then bring into play following effect: the sufficient room that the urceolus that can guarantee the described wet-milling supplying machine to possess cleans, and can suppress the maximization of described dewatering drying device.
In addition,, in dewatering drying device of the present invention, preferred described wet-milling supplying machine is arranged on the vertical below of described dewaterer, and the mode that described helical blade becomes level with its axle arranges.
By above-mentioned scheme, can realize the miniaturization of described dewatering drying device.
In addition, in dewatering drying device of the present invention, as preferably, also possess wet-milling storage tank, the described polymer of described wet-milling storage tank storage after described dewaterer dehydration, and described polymer is fed into described wet-milling supplying machine; Described wet-milling storage tank is positioned at the vertical below of described dewaterer, and is positioned at the vertical top of described wet-milling supplying machine.
According to above-mentioned scheme, the described polymer after described dewaterer dehydration is stored to described wet-milling storage tank, is fed into described wet-milling supplying machine from described wet-milling storage tank.Therefore the wet-milling input amount of the time per unit dropping into described wet-milling supplying machine roughly can be remained to constant.
In addition, in dewatering drying device of the present invention, when described input port is arranged on the top of described urceolus and is arranged on long axis direction central part take described urceolus as benchmark, with the side that side is contrary that arranges of described drying machine.
According to such scheme, can guarantee in the inside of urceolus the abundant conveyance space in order to conveyance wet-milling.
In addition,, in dewatering drying device of the present invention, preferred described glide base also possesses described glide base is fixed on to the pedestal fixed cell on described slide rail.
According to such scheme, can suppress to produce skew because rotatablely moving of helical blade causes the position of glide base.
In addition,, in dewatering drying device of the present invention, preferred described wet-milling supplying machine also possesses the flange in order to described urceolus and described spiral fixed part are secured together.
According to such scheme, can further suppress to produce skew because rotatablely moving of helical blade causes the position of glide base.
In addition,, in dewatering drying device of the present invention, described drying machine is gyration airflow drying machine preferably.
According to such scheme, and then performance can make described dewatering drying device further be able to the effect of miniaturization.
In addition, in dewatering drying device of the present invention, preferably centrifugal dehydrator of described dewaterer.
In addition,, in dewatering drying device of the present invention, described helical blade is single axle helical blade preferably.
In addition,, in dewatering drying device of the present invention, described helical blade is double-shaft spiral blade or many stripeds helical blade preferably.
According to above-mentioned scheme, and then bring into play following effect: even if use obviously poor wet-milling of conveyance, described wet-milling supplying machine also can successfully be supplied to described drying machine by described polymer.
In addition, in dewatering drying device of the present invention, preferred described gyration airflow drying machine possesses: cylindrical container, has the inner space of concentric circles; The ingress pipe of heated air, is connected to the bottom of described cylindrical container; Cyclotron mechanism, makes the described heated air importing from described ingress pipe in described cylindrical container, become convolution ascending air.
In addition,, in dewatering drying device of the present invention, as preferably, described centrifugal dehydrator possesses: rotating shaft; Drench pit, is arranged on described rotating shaft; Solid-liquid separation membrane, along the inner wall arrangement of described drench pit; Supply port, is supplied to the mixture of described polymer and aqueous medium in described drench pit in order to the vertical top from described drench pit; Dispersion plate, is arranged in described drench pit, and makes to disperse to described solid-liquid separation membrane from the described polymer of described supply port supply and the mixture of aqueous medium; Scraping unit, scraping is through the dispersion of described dispersion plate and be attached to the described polymer on described solid-liquid separation membrane; Described supply port arranges in the mode of supplying with the mixture of described polymer and aqueous medium facing to described dispersion plate.
The manufacture method of polymer of the present invention comprises the polymerization procedure that obtains polymer by suspension polymerization, and also comprise: by through polymerization procedure and polymer and the mixture of aqueous medium, be supplied to the step that dehydrates that dehydrates processing with dewatering drying device claimed in claim 1.
According to such scheme, because use is easy to the described dewatering drying device of dismantling and cleaning in the time that product thing switches, the sneaking into of the different product things therefore can suppress to manufacture the different polymer of kind time (pollution).
In addition,, in the manufacture method of polymer of the present invention, described polymer can be vinylidene fluoride polymer.
According to such scheme, in the manufacture of vinylidene fluoride polymer, can obtain the effect of described manufacture method.
In addition,, in the manufacture method of polymer of the present invention, described polymer can be vinylidene chloride polymer.
According to such scheme, in the manufacture of vinylidene chloride polymer, can obtain the effect of described manufacture method.
[embodiment]
Below, the example while reality having been used to the dewatering drying device 1 of an embodiment of the present invention describes.
(dehydrating processing)
From the slurry supply port 21 of centrifugal dehydrator 2, supplying with the average grain diameter containing 55g in every 100g water is the slurry of the granular vinylidene fluoride polymer of 175 μ m, to be the rotating speed of 1100r/min to the maximum, has carried out the processed in 30 seconds.Obtain the wet-milling containing 20g water in every 100g polymer by processed.Via wet-milling storage tank 3, the wet-milling that carries out processed with centrifugal dehydrator 2 and obtain is fed into wet-milling supplying machine 4.
The diameter of the helical blade 43 of the wet-milling supplying machine 4 using is 90mm, and the long axis direction length of helical blade 43 is 900mm, and the value of L/D is 10.
Be 20r/min by the speed setting of the helical blade of wet-milling supplying machine 4 43, by the wet-milling of supplying with from centrifugal dehydrator 2, be supplied to continuously gyration airflow drying machine 5.
In the present embodiment, used the gyration airflow drying machine 5 of the drum that possesses diameter 35cm, high 165cm.With 2000Nm
3the mode of/hr, supplies with the hot blast of 140 ℃ to gyration airflow drying machine 5, and the wind-warm syndrome at outlet 52 places is set as more than 50 ℃.The reason of so setting is: if the wind-warm syndrome at outlet 52 places of gyration airflow drying machine 5 is less than 50 ℃, just the moisture content of dried powder is more than 0.1%, this does not meet desired product property.
The entrance hot blast of gyration airflow drying machine 5 is managed as fixed temperature and is managed as fixing air quantity.In the time that the wet-milling that is controlled to regulation moisture content is fed into the inside of gyration airflow drying machine 5, along with increasing of wet-milling input amount, the consumption of the heat that hot blast has also can increase.Therefore,, along with the increase of the wet-milling input amount to gyration airflow drying machine 5, the hot blast temperature at outlet 52 places can reduce.In the present embodiment, if the hot blast temperature at outlet 52 places becomes below 50 ℃, the moisture content of the wet-milling of discharging will exceed 0.1%.
Reality is dried after processing with gyration airflow drying machine 5, has obtained the powder that moisture content is less than 0.1%.
(dismounting cleaning)
After dry processing finishes, for cleaning and dewatering drying device 1, carry out in the following order the decomposition of wet-milling supplying machine 4 and cleaned.
Take the flange part with spiral fixed part 45 in order to fixed outer cylinder 41 apart.Then, glide base 46 is slided and helical blade 43 is extracted from urceolus 41.Till helical blade 43 is extracted from urceolus 41, two people have spent 15 minutes.
Afterwards, remove the wet-milling remaining on helical blade 43 and in urceolus 41, and clean.Then make glide base 46 slide, the mode that is received into urceolus 41 inside with the helical blade 43 having cleaned is assembled, and utilizes flange part to fix spiral fixed part 45 and urceolus 41.From the assembling of helical blade 43, till utilizing flange part to be fixed before, two people have spent 15 minutes.
In the present embodiment, because the axle of helical blade 43 is fixed by glide base 46, there is not mutual skew in the axle of helical blade 43 and urceolus 41 center therefore.
(comparative example)
Then, as a comparative example, the embodiment while not possessing the wet-milling supplying machine of glide base and slide rail to using describes.About other formations except glide base and slide rail, identical with the dewatering drying device 1 shown in embodiment.Similarly carry out dehydrating processing with embodiment.
After dry processing finishes, for cleaning and dewatering drying device, carry out in the following order the decomposition of wet-milling supplying machine 4 and cleaned.Take the flange part with spiral fixed part 45 in order to fixed outer cylinder 41 apart.Then, use crane that helical blade 43 is hung, and simultaneously adjust helical blade 43 and do not touch with urceolus, one side is extracted helical blade 43 out from urceolus 41.Till helical blade 43 is extracted out from urceolus 41, two people have spent 60 minutes.
Afterwards, remove the wet-milling remaining on helical blade 43 and in urceolus 41, and clean.Then, use crane hang the helical blade 43 having cleaned, the mode that is received into urceolus 41 inside with helical blade 43 is assembled, and so that the Centered mode of the axle of helical blade 43 and urceolus 41 adjust.Finally, utilize flange part to fix spiral fixed part 45 and urceolus 41.
From the assembling of helical blade 43, till utilizing flange part to be fixed before, two people have spent 180 minutes.
As mentioned above, the dewatering drying device 1 of one embodiment of the present invention is owing to possessing slide rail 44 and glide base 46, therefore easily dismantle, clean, therefore can significantly shorten the dismounting, cleaning of dewatering drying device 1, the required time of assembling again than this comparative example.
(manufacture method of polymer)
In addition, the dewatering drying device 1 that is easy to dismounting and cleaning by use dehydrates processing, can suppress sneaking into of different product things, therefore can stably dehydrate processing.Therefore, following polymers manufacturing method is also contained in category of the present invention., the manufacture method of described polymer comprises: polymerization procedure, obtains polymer by suspension polymerization; And dehydrate step, by through polymerization procedure and polymer and the mixture that mixes of aqueous medium, be supplied to dewatering drying device of the present invention and carry out processed.
About the polymer of manufacturing by the polymerization procedure in this manufacture method, as long as the polymer that can obtain by suspension polymerization, be not particularly limited, can enumerate described vinylidene fluoride polymer, vinylidene chloride polymer, vinyl chloride-base polymer, vinyl acetate polymer, styrene polymer and methylmethacrylate polymer etc.Wherein, preferred vinylidene fluoride polymer and vinylidene chloride polymer.
(remarks item)
It is described each embodiment that the present invention is not limited to, and can in the scope shown in technical scheme, carry out various changes.The technical scheme disclosing separately in different embodiments is in addition appropriately combined and the embodiment that obtains is also included in the technical scope of the present invention.
[utilizability in industry]
The present invention can be used for the manufacture of polymer.
Claims (17)
1. a dewatering drying device, dewaters and is dried the mixture of polymer and aqueous medium, it is characterized in that:
Possess: dewaterer, dewaters to the mixture of described polymer and aqueous medium;
Drying machine, is dried the described polymer after described dewaterer dehydration;
Wet-milling supplying machine, is supplied to described drying machine by the described polymer after the dehydration of described dewaterer, and has the helical blade that one end of axle is fixed,
It is distolateral that described drying machine is arranged on another of described axle of helical blade described in described wet-milling supplying machine,
Described wet-milling supplying machine possesses:
Urceolus;
Input port, is arranged on described urceolus, and in order to the described polymer after described dewaterer dehydration is fed in described wet-milling supplying machine;
Described helical blade, is arranged on the inside of described urceolus, and by the described polymer conveyance dropping into from described input port to described drying machine;
Glide base, has the spiral fixed part that the described one end of the described axle to described helical blade is fixed;
Slide rail, slides along the direction of the described axle of described helical blade for described glide base.
2. dewatering drying device according to claim 1, is characterized in that:
The long axis direction length of described helical blade is greater than 5 and be less than 15 with respect to the ratio of the diameter of described helical blade.
3. dewatering drying device according to claim 1, is characterized in that:
The mode of exposing from one end of described urceolus with described helical blade, described glide base is able to fixing described one distolateral of axle towards described helical blade, and on described slide rail, slide to one end of described slide rail along the direction of the described axle of described helical blade, and in the time that described glide base has slided into described one end of described slide rail, the distance of the described other end of the described helical blade exposing from described urceolus and described one end of described urceolus is 10cm～50cm.
4. dewatering drying device according to claim 1, is characterized in that:
Described wet-milling supplying machine is arranged on the vertical below of described dewaterer;
The mode that described helical blade becomes level with its axle arranges.
5. dewatering drying device according to claim 1, is characterized in that:
Also possess wet-milling storage tank, the described polymer of described wet-milling storage tank storage after described dewaterer dehydration, and described polymer is fed into described wet-milling supplying machine;
Described wet-milling storage tank is positioned at the vertical below of described dewaterer, and is positioned at the vertical top of described wet-milling supplying machine.
6. dewatering drying device according to claim 1, is characterized in that:
Described input port, when being arranged on the top of described urceolus and being arranged on long axis direction central part take described urceolus as benchmark, with the side that side is contrary that arranges of described drying machine.
7. dewatering drying device according to claim 1, is characterized in that:
Described glide base also possesses described glide base is fixed on to the pedestal fixed cell on described slide rail.
8. dewatering drying device according to claim 1, is characterized in that:
Described wet-milling supplying machine also possesses the flange in order to described urceolus and described spiral fixed part are secured together.
9. dewatering drying device according to claim 1, is characterized in that: described drying machine is gyration airflow drying machine.
10. dewatering drying device according to claim 1, is characterized in that: described dewaterer is centrifugal dehydrator.
11. dewatering drying devices according to claim 1, is characterized in that: described helical blade is single axle helical blade.
12. dewatering drying devices according to claim 1, is characterized in that: described helical blade is double-shaft spiral blade or many stripeds helical blade.
13. dewatering drying devices according to claim 9, is characterized in that,
Described gyration airflow drying machine possesses:
Cylindrical container, has the inner space of concentric circles;
Ingress pipe, is connected to the bottom of described cylindrical container, and imports heated air;
Cyclotron mechanism, makes the described heated air importing from described ingress pipe in described cylindrical container, become convolution ascending air.
14. dewatering drying devices according to claim 10, is characterized in that:
Described centrifugal dehydrator possesses:
Rotating shaft;
Drench pit, is arranged on described rotating shaft;
Solid-liquid separation membrane, along the inner wall arrangement of described drench pit;
Supply port, is supplied to the mixture of described polymer and aqueous medium in described drench pit in order to the vertical top from described drench pit;
Dispersion plate, is arranged in described drench pit, and makes to disperse to described solid-liquid separation membrane from the described polymer of described supply port supply and the mixture of aqueous medium;
Scraping unit, scraping is through the dispersion of described dispersion plate and be attached to the described polymer on described solid-liquid separation membrane;
Described supply port arranges in the mode of supplying with the mixture of described polymer and aqueous medium facing to described dispersion plate.
The manufacture method of 15. 1 kinds of polymer, comprises the polymerization procedure that obtains polymer by suspension polymerization, characterized by further comprising:
By through polymerization procedure and polymer and the mixture of aqueous medium, be supplied to the step that dehydrates that dehydrates processing with dewatering drying device claimed in claim 1.
The manufacture method of 16. polymer according to claim 15, is characterized in that: described polymer is vinylidene fluoride polymer.
The manufacture method of 17. polymer according to claim 15, is characterized in that: described polymer is vinylidene chloride polymer.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-275147 | 2012-12-17 | ||
| JP2012275147A JP2014119192A (en) | 2012-12-17 | 2012-12-17 | Dehydrating and drying device, and method of producing polymer |
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| Publication Number | Publication Date |
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| CN103868337A true CN103868337A (en) | 2014-06-18 |
| CN103868337B CN103868337B (en) | 2016-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320830075.3U Withdrawn - After Issue CN203758200U (en) | 2012-12-17 | 2013-12-16 | Dehydrating and drying device |
| CN201310688337.1A Active CN103868337B (en) | 2012-12-17 | 2013-12-16 | The manufacture method of dewatering drying device and polymer |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320830075.3U Withdrawn - After Issue CN203758200U (en) | 2012-12-17 | 2013-12-16 | Dehydrating and drying device |
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| CN (2) | CN203758200U (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014119192A (en) * | 2012-12-17 | 2014-06-30 | Kureha Corp | Dehydrating and drying device, and method of producing polymer |
| CN104390430B (en) * | 2014-11-21 | 2016-04-27 | 嘉兴溢联电子有限公司 | A kind of air-dry separator being applied to swill |
| CN106241233A (en) * | 2016-09-12 | 2016-12-21 | 新疆广汇中化能源技术开发有限公司 | Rotatable radiation bed |
| CN108061429A (en) * | 2017-11-29 | 2018-05-22 | 铜陵市宏达家电有限责任公司 | A kind of efficient pneumatic drying device |
| CN112718110A (en) * | 2020-12-16 | 2021-04-30 | 安徽省蒙城县恒瑞面粉有限公司 | Flour production equipment |
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| JP3044092U (en) * | 1997-06-06 | 1997-12-12 | 信越ポリマー株式会社 | Screw conveyor |
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| JPH0344092U (en) * | 1989-09-07 | 1991-04-24 | ||
| CN1078866A (en) * | 1992-05-19 | 1993-12-01 | 中国水产科学研究院水产技术开发公司 | Process for beer waste matter protein feedstuff and equipment |
| CN1207168A (en) * | 1995-12-30 | 1999-02-03 | 株式会社奈良机械制作所 | Pulverized body drying method and apparatus |
| JP3044092U (en) * | 1997-06-06 | 1997-12-12 | 信越ポリマー株式会社 | Screw conveyor |
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| CN203758200U (en) * | 2012-12-17 | 2014-08-06 | 株式会社吴羽 | Dehydrating and drying device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014119192A (en) | 2014-06-30 |
| CN103868337B (en) | 2016-03-09 |
| CN203758200U (en) | 2014-08-06 |
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