CN104147952A - Material static mixer for aramid fiber pre-polymerization - Google Patents
Material static mixer for aramid fiber pre-polymerization Download PDFInfo
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- CN104147952A CN104147952A CN201410413753.5A CN201410413753A CN104147952A CN 104147952 A CN104147952 A CN 104147952A CN 201410413753 A CN201410413753 A CN 201410413753A CN 104147952 A CN104147952 A CN 104147952A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to a material static mixer for aramid fiber pre-polymerization, and belongs to the technical field of static mixer equipment. The bottom of the mixing chamber of the static mixer is provided with a piston rod pushing chamber. The inner wall layer and the external wall layer of the mixing chamber are arranged between the mixing chamber inner cavity and the piston rod pushing chamber. The bottom of the mixing chamber inner cavity is provided with a piston head, the bottom the piston head is connected to a piston pushing rod, and the piston pushing rod goes through the inner wall layer and the external wall layer of the mixing chamber and extends from the mixing chamber to the piston rod pushing chamber. The bottom of the piston rod pushing chamber is provided with a sealing flange. The static mixer can remove the oligomer sediment, prevents the continuous material leaking to reduce loss, and is capable of guaranteeing the rapid and continuous reactions.
Description
Technical field
The present invention relates to a kind of material static mixer, more particularly, the present invention relates to one for the prepolymerized material static mixer of aramid II, belong to static mixer equipment technical field.
Background technology
E.I.Du Pont Company has delivered a kind of high-performance Fanglun 1414 in 1966, its formal commodity are called Kafra fiber, and China is called for short p-aramid fiber, Fanglun l414 or aramid II.Because it has high strength, high-modulus and the characteristic such as high temperature resistant, be widely used at present tire cord, high strength rigging, high-pressure bottle shell, automobile friction, building earth working material, the various reinforced composites that replace iron and steel, conveyer belt, extraordinary canvas etc.At military aspect as made flak jackets, the helmet, tub, armour plate, radar installations outer cover etc.Because its purposes is very extensive, be once called as " all-round fibre ".
The polymerization process of aramid II is that paraphthaloyl chloride (TPC) and p-phenylenediamine (PPD) (PPDA) react in dicyandiamide solution, and it is fast that this reaction has reaction speed, and therefore the feature that thermal discharge is large is prepared polymer and conventionally adopted two-step process.First, PPDA is dissolved in solvent (1-METHYLPYRROLIDONE that contains calcium chloride), forms cryogenic fluid, then the TPC of equimolar ratio is added in reaction in two steps.First part of TPC accounts for the 20-40% of total TPC amount, forms prepolymer with PPDA solution, then remaining TPC reacted with prepolymer, obtains final polymer.Conventionally can be divided into batch process and continuity method and obtain polymer, but batch process production efficiency is low, between batch, product quality fluctuation greatly, is applicable to laboratory, the general continuity method that adopts in suitability for industrialized production.Produce in the process of aramid II polymerization thing in continuity method, TPC participates in reaction to melt state (being greater than 82 DEG C), and first part of melting TPC carries out prepolymerization with PPDA cryogenic fluid, formation prepolymer.Prepolymer is controlled at low-temperature condition and enters polymer reactor with second part of TPC and reacts, and obtains aramid II polymerization thing.
Produce aramid II polymerization thing in continuity method, carry out in prepolymerization process, when PPDA cryogenic fluid reacts with first part of molten state TPC, because two kinds of materials in this course of reaction exist the very large temperature difference, the temperature that should ensure high-temperature material feed end equipment maintains on material fusing point (82 DEG C), otherwise it is solid-state that TPC can be changed into by liquid state, charging aperture stops up; Ensure that again low-temperature material end device temperature maintains low-temperature condition (30 DEG C following), otherwise because PPDA activity is extremely strong, affect properties of product; Simultaneously because high molecular weight reactive herein easily produces a small amount of oligomer precipitation, the result of accumulation can cause the obstruction of charging aperture or discharging opening, production process stops thus, and therefore this equipment need to possess the function of carrying out aborning in good time online internal cleaning, avoids stopping.Because aramid II polymerization reaction is more high than required precision to the metering of reaction monomers, therefore the leakage rate of equipment is also had to requirement simultaneously, do not allow equipment for a long time in leak condition, affect properties of product thereby affect reactant ratio.
Although China since the eighties in 20th century also the research of para-aramid fiber, aspect polymer, made some progress at that time, but never find suitable mixing apparatus can carry out continuous polymerisation, thereby cause the aramid II polymerization thing inherent viscosity of production inhomogeneous, make the coefficient of dispersion of mechanical property of fiber very large, can not reach instructions for use.
State Intellectual Property Office discloses a utility model patent that notification number is CN201140046 on October 29th, 2008, and this patent discloses a kind of material mixer for high temperature difference quick reaction, and hybrid reaction is carried out smoothly.And the utility model is applied in aramid fiber production, realize PPTA resin continuous stabilization ground industrial production.This blender comprises mixing bunker in housing, housing, leads to two fluid passages and the charging aperture of mixing bunker, and piston storehouse is established in the upper end of mixing bunker, and there is vertical guide groove the two side of piston, and there is the guide groove of a latch through piston both sides the upper end of charging aperture.Adopt this utility model can make two monomers of reaction after mixing taking precise chemical structure stoichiometric coefficient as proportioning continous-stable, enter into polymer reactor in solvent and cosolvent, produce continuously and stably the resin of HMW.
What above-mentioned blender was mainly considered is the cleaning to two charging apertures, and is provided with cleaning piston at high-temperature material feed end.But blender is considered not enough to the sedimental clearing function of the oligomer in prepolymerization process, do not consider piston seal aspect may leakage problem.
Above-mentioned blender does not fully take into account the sealing problem outside piston and mixing bunker.Because piston takes regular exercise, therefore its sealing difficulty is larger, and the solvent in mixing bunker very easily permeates, lubricates simultaneously, and polarity is extremely strong, and to the seriously corroded of encapsulant, once seal failure generation seepage needs to produce and stops, loss greatly.If do not processed, prepolymer or PPDA solution let out from mixing bunker, and leakage rate is difficult to control, and causes in subsequent reactions process material proportion unbalance, affects the quality of polymer.
Summary of the invention
The present invention is intended to the problem existing while solving existing blender for aramid II prepolymerization, provide a kind of for the prepolymerized material static mixer of aramid II, reach the online oligomer sediment of removing in good time, avoid producing and stop, prevent that material from continuing to leak simultaneously, affect the object of polymer quality thereby affect reactant ratio.
To achieve these goals, concrete technical scheme of the present invention is as follows:
A kind of for the prepolymerized material static mixer of aramid II, comprise mixing bunker, the first material inlet, the second material inlet and discharging opening, it is characterized in that: described mixing bunker comprises mixing bunker inner chamber, mixing bunker inner wall layer and mixing bunker outer wall layer from the inside to the outside; Described discharging opening is arranged on the top of mixing bunker, and the bottom of described mixing bunker is provided with piston rod and promotes storehouse, and it is mixing bunker inner wall layer and mixing bunker outer wall layer that mixing bunker inner chamber and described piston rod promote between storehouse; The bottom of described mixing bunker inner chamber is provided with piston head, and piston head bottom connects piston catch bar, and described piston catch bar, through mixing bunker inner wall layer and mixing bunker outer wall layer, extends to piston rod from mixing bunker and promotes storehouse; The bottom that described piston rod promotes storehouse is provided with sealing flange.
The internal diameter of discharging opening of the present invention and the internal diameter of described mixing bunker equate or are greater than the internal diameter of mixing bunker.
The first material inlet of the present invention and the second material inlet are positioned at differing heights position, and are oppositely arranged.
In mixing bunker outer wall layer of the present invention, be provided with cooling or add the chuck of thermal material.
The first charging aperture of the present invention and the second charging aperture are arranged on the both sides of mixing bunker, and the first described material inlet is communicated with described mixing bunker inner chamber by the first fluid passage being arranged in mixing bunker outer wall layer; The second described material inlet is communicated with described mixing bunker inner chamber by the second fluid passage being arranged in mixing bunker outer wall layer; Described first fluid passage and/or second fluid passage outer setting have cooling or add the chuck of thermal material.
Piston rod of the present invention promotes the length in storehouse and the bottom of mixing bunker inner chamber equates to the distance of discharging opening, and described piston catch bar extends to the bottom in piston rod promotion storehouse from mixing bunker.
The gap that the outer wall of piston catch bar of the present invention and piston rod promote the inwall in storehouse is 1-5mm.
Between the neighboring of piston head of the present invention and mixing bunker surface of internal cavity, leave gap, the sectional area in this gap is greater than the summation of first fluid passage and second fluid channel cross-sectional area.
Piston head cross section of the present invention is circular, is provided with multiple dentation projections in circular periphery.
Piston catch bar of the present invention bottom is provided with the connecting portion of screw thread or buckle.
The useful technique effect that the present invention brings:
1, the patent high-temperature material side of mentioning in background technology arranges needle valve, its sealing difficulty is large, and maintenance of equipment rate is high, stops once occur to leak will cause to produce, and material easily unrestrictedly leaks out from mixing bunker, thereby cause the unbalance product quality that affects of reactant ratio.
Of the present inventionly be provided with mixing bunker, charging aperture, fluid passage, discharging opening etc. for the prepolymerized material static mixer of aramid II, the piston rod being provided with below mixing bunker for sealing promotes storehouse and sealing flange.Such structure has changed the original mode of clearing up at high-temperature material charging aperture place into the material of piling up at mixing bunker internal cleaning, makes structure simpler, and device fabrication, maintenance are more prone to.
In addition, piston catch bar is to pass mixing bunker inwall, mixing bunker outer wall from mixing bunker, extends to piston rod and promotes storehouse, and gap is very little, and certain sealing function has been played in mixing bunker inwall bottom, and material is difficult for leaking out from mixing bunker.
But in common plunger designs, the leakage of material is unavoidable in the motion process of piston, especially for lubricity and the stronger PPDA dicyandiamide solution of permeability, accomplish that positive confinement is very difficult.Even if described mixing bunker has material to leak from piston rod in the present invention, these materials are concentrated in the cushion space of piston rod promotion this sealing of storehouse, and follow-up material just can not continue to leak, and forms sealing completely, can not process, avoid the loss of stopping and causing.Cushion space in piston rod promotion storehouse is very little, and the inventory leaking out is very little on the impact of producing.Before static mixer uses, piston head rests on the bottom of mixing bunker, can not affect the normal input and output material of mixing bunker.
2, the internal diameter of discharging opening of the present invention and the internal diameter of described mixing bunker equate or are greater than the internal diameter of mixing bunker.The main matter that the built-in piston head of this blender need to be cleared up is the deposit of the oligomer that long reaction accumulation forms in mixing bunker, and this deposit can stop up material inlet, discharging opening.In scale removal process, this deposit finally need to be discharged by discharging opening, and the internal diameter that the internal diameter of discharging opening is equal to or greater than mixing bunker can ensure that deposit completely, successfully discharge, does not stay dead angle.
3, the first material inlet of the present invention and the second material inlet are positioned at differing heights position, and are oppositely arranged.In actual production, the first material is different from inlet amount and the temperature of charge of the second material, the material feeding mouth that high temperature easily solidifies is arranged near discharging opening place, the material feeding mouth that low-temperature material or inventory are large is arranged near piston head place, can avoid like this high-temperature material to be deposited on piston head, also can extend the time that oligomer deposit forms.
4, in mixing bunker outer wall layer of the present invention, be provided with cooling or add the chuck of thermal material.Described first fluid passage and/or second fluid passage outside also can be provided with cooling or add the chuck of thermal material.Chuck cooling or that add thermal material is set in mixing bunker outer wall layer and can controls the temperature that material reacts in mixing bunker, thereby control reaction rate, guarantee to obtain the prepolymer of needed particular viscosity and molecular weight distribution.Outer setting chuck cooling or heating in fluid passage can be controlled the temperature of material before entering mixing bunker, keeps activity or the form of material.
5, the piston rod promotion length in storehouse of the present invention and the bottom of mixing bunker inner chamber equate to the distance of discharging opening, and described piston catch bar extends to the bottom in piston rod promotion storehouse from mixing bunker.The length that piston rod promotes storehouse is set like this, and the setting of piston catch bar just ensures that the cephalomotor ultimate range of piston reaches the top discharge mouth place of mixing bunker, ensure that deposit is pushed out completely, also can ensure that piston rod promotes the volume minimum in storehouse, reduces loss of material simultaneously.
6, the gap of the inwall in the outer wall of piston catch bar of the present invention and piston rod promotion storehouse is 1-5mm.First the setting of this interstice coverage has ensured there are enough spacing between piston catch bar and the inwall in piston rod promotion storehouse, and can ensure can freely-movable can not produce friction after outside connecting rod connects, and does not affect operation; Ensure that on the other hand gap is as far as possible little, make piston rod promote storage capacity little, the inventory that may infiltrate into piston rod promotion storehouse from mixing bunker like this, with regard to few, drops to loss of material minimum.
7, relatively charging aperture is less for the patent high-temperature material side charging aperture in background technology and mixing bunker, in piston scale removal process, the charging area of charging aperture is blocked by major part, therefore affect material feeding, easily form pulse or directly block, cause both sides material feeding proportional imbalance.Between the neighboring of piston head of the present invention and mixing bunker surface of internal cavity, leave gap, the sectional area in this gap is greater than the summation of first fluid passage and second fluid channel cross-sectional area, can guarantee that material smooth charging in both sides is unaffected in the time of piston movement, not produce pulse.
8, piston head cross section of the present invention is circular, is provided with multiple dentation projections in circular periphery.Setting, first in the time of cleaning material, can make cdontoid process block edge to greatest extent near charging aperture place like this, makes the scraping efficiency of piston head higher, and the residual meeting of the better oligomer of scraping effect still less.Simultaneously also gapped between dentation projection, ensure to leave enough gaps between the neighboring of piston head and mixing bunker surface of internal cavity.
9, piston catch bar of the present invention bottom is provided with the connecting portion of screw thread or buckle.The structure of screw thread or buckle is convenient to piston catch bar and is connected fast with outside connecting rod, and simple in structure being convenient to implemented, and increases work efficiency.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention for the prepolymerized material static mixer of aramid II.
Fig. 2 is the use connection layout of the present invention for the prepolymerized material static mixer of aramid II.
Fig. 3 is the cross-sectional structure schematic diagram of the present invention for the mixing bunker inner chamber of the prepolymerized material static mixer of aramid II, and piston head cross section is circular.
Fig. 4 is the cross-sectional structure schematic diagram of the present invention for the mixing bunker inner chamber of the prepolymerized material static mixer of aramid II, and piston head cross section is circular, and the periphery of piston head is provided with multiple dentation projections.
Fig. 5 is the structural representation of the present invention for the outside connecting rod of the prepolymerized material static mixer of aramid II.
Reference numeral: 1 for mixing bunker, 2 be the first material inlet, 3 be the second material inlet, 4 for discharging opening, 5 for mixing bunker inner chamber, 6 for mixing bunker inner wall layer, 7 for mixing bunker outer wall layer, 8 for piston rod promote storehouse, 9 for piston head, 10 for piston catch bar, 11 for sealing flange, 12 for first fluid passage, 13 for second fluid passage, 14 for dentation projection, 15 for connecting portion, 16 for outside connecting rod, 101 for static mixer, 102 be pre-polymerization reactor.
Detailed description of the invention
embodiment 1
Now be used for the prepolymerized material static mixer of aramid II in conjunction with Fig. 1 explanation:
Comprise mixing bunker 1, the first material inlet 2, the second material inlet 3 and discharging opening 4, described mixing bunker 1 comprises mixing bunker inner chamber 5, mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7 from the inside to the outside; Described discharging opening 4 is arranged on the top of mixing bunker 1, and the bottom of described mixing bunker 1 is provided with piston rod and promotes storehouse 8, and it is mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7 that mixing bunker inner chamber 5 and described piston rod promote between storehouse 8; The bottom of described mixing bunker inner chamber 5 is provided with piston head 9, and piston head 9 bottoms connect piston catch bar 10, and described piston catch bar 10, through mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7, extends to piston rod from mixing bunker 1 and promotes storehouse 8; The bottom that described piston rod promotes storehouse 8 is provided with sealing flange 11.
Static mixer of the present invention is independently provided with piston rod and promotes storehouse 8, piston rod promotes to be separated by mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7 between storehouse 8 and mixing bunker inner chamber 5, on mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7, have the through hole adapting with piston catch bar 10 external diameters, make piston catch bar 10 from mixing bunker inner chamber 5, to extend to piston rod through through hole and promote storehouse 8.In the time of mixing of materials, piston head 9 rests on the bottom of mixing bunker inner chamber 5, does not affect the normal input and output material of mixing bunker 1.Because through hole surrounding has mixing bunker inner wall layer 6, form a platform that plays cushioning effect, and gap between through hole and piston catch bar 10 is very little, so material is difficult for leaking.Even if material leaks, the material leaking is also aggregated piston rod and promotes in storehouse 8, can not leak out, the shut-down of need not stopping, and in piston rod promotion storehouse 8, volume is limited, in the time that leaked substance fills up piston rod promotion storehouse 8, just there will be no material from leakage, avoid material to lose in a large number, impact is produced and product.When mixing of materials after 2-3 days, mixing bunker inner chamber 5 starts to occur oligomer deposit, now opens sealing flange 12, moves back and forth with piston, cleans out oligomer deposit.
embodiment 2
Now be used for the prepolymerized material static mixer of aramid II in conjunction with Fig. 1 explanation:
Comprise mixing bunker 1, the first material inlet 2, the second material inlet 3 and discharging opening 4, described mixing bunker 1 comprises mixing bunker inner chamber 5, mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7 from the inside to the outside; Described discharging opening 4 is arranged on the top of mixing bunker 1, and the bottom of described mixing bunker 1 is provided with piston rod and promotes storehouse 8, and it is mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7 that mixing bunker inner chamber 5 and described piston rod promote between storehouse 8; The bottom of described mixing bunker inner chamber 5 is provided with piston head 9, and piston head 9 bottoms connect piston catch bar 10, and described piston catch bar 10, through mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7, extends to piston rod from mixing bunker 1 and promotes storehouse 8; The bottom that described piston rod promotes storehouse 8 is provided with sealing flange 11.
Preferably, the internal diameter of described discharging opening 4 and the internal diameter of described mixing bunker 1 equate or are greater than the internal diameter of mixing bunker 1.The internal diameter of mixing bunker 1 is the diameter of mixing bunker inner chamber 5.Like this setting can ensure deposit completely, successfully discharge, do not stay dead angle.
embodiment 3
Be used for the prepolymerized material static mixer of aramid II:
Comprise mixing bunker 1, the first material inlet 2, the second material inlet 3 and discharging opening 4, described mixing bunker 1 comprises mixing bunker inner chamber 5, mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7 from the inside to the outside; Described discharging opening 4 is arranged on the top of mixing bunker 1, and the bottom of described mixing bunker 1 is provided with piston rod and promotes storehouse 8, and it is mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7 that mixing bunker inner chamber 5 and described piston rod promote between storehouse 8; The bottom of described mixing bunker inner chamber 5 is provided with piston head 9, and piston head 9 bottoms connect piston catch bar 10, and described piston catch bar 10, through mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7, extends to piston rod from mixing bunker 1 and promotes storehouse 8; The bottom that described piston rod promotes storehouse 8 is provided with sealing flange 11.
Preferably, described the first material inlet 2 and the second material inlet 3 are positioned at differing heights position, and are oppositely arranged.
embodiment 4
Now be used for the prepolymerized material static mixer of aramid II in conjunction with Fig. 1 explanation:
Comprise mixing bunker 1, the first material inlet 2, the second material inlet 3 and discharging opening 4, described mixing bunker 1 comprises mixing bunker inner chamber 5, mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7 from the inside to the outside; Described discharging opening 4 is arranged on the top of mixing bunker 1, and the bottom of described mixing bunker 1 is provided with piston rod and promotes storehouse 8, and it is mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7 that mixing bunker inner chamber 5 and described piston rod promote between storehouse 8; The bottom of described mixing bunker inner chamber 5 is provided with piston head 9, and piston head 9 bottoms connect piston catch bar 10, and described piston catch bar 10, through mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7, extends to piston rod from mixing bunker 1 and promotes storehouse 8; The bottom that described piston rod promotes storehouse 8 is provided with sealing flange 11.
Preferably, in described mixing bunker outer wall layer 7, be provided with cooling or add the chuck of thermal material.
Preferably or further, the first described charging aperture 2 and the second charging aperture 3 are arranged on the both sides of mixing bunker 1, the first described material inlet 2 is communicated with described mixing bunker inner chamber 5 by the first fluid passage 13 being arranged in mixing bunker outer wall layer 7; The second described material inlet 3 is communicated with described mixing bunker inner chamber 5 by the second fluid passage 14 being arranged in mixing bunker outer wall layer 7; Described first fluid passage 12 and/or second fluid passage 13 outer setting have cooling or add the chuck of thermal material.
embodiment 5
Now be used for the prepolymerized material static mixer of aramid II in conjunction with Fig. 1 explanation:
Comprise mixing bunker 1, the first material inlet 2, the second material inlet 3 and discharging opening 4, described mixing bunker 1 comprises mixing bunker inner chamber 5, mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7 from the inside to the outside; Described discharging opening 4 is arranged on the top of mixing bunker 1, and the bottom of described mixing bunker 1 is provided with piston rod and promotes storehouse 8, and it is mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7 that mixing bunker inner chamber 5 and described piston rod promote between storehouse 8; The bottom of described mixing bunker inner chamber 5 is provided with piston head 9, and piston head 9 bottoms connect piston catch bar 10, and described piston catch bar 10, through mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7, extends to piston rod from mixing bunker 1 and promotes storehouse 8; The bottom that described piston rod promotes storehouse 8 is provided with sealing flange 11.
Preferably, described piston rod promotes the length in storehouse 8 and the bottom of mixing bunker inner chamber 5 equates to the distance of discharging opening 4, and described piston catch bar 10 extends to the bottom in piston rod promotion storehouse 8 from mixing bunker 1.
Preferably or further, to promote the gap of the inwall in storehouse 8 be 1-5mm for the outer wall of described piston catch bar 10 and piston rod.
The gap that the outer wall of above-mentioned piston catch bar 10 and piston rod promote the inwall in storehouse 8 can be 1,2,3,4,5mm.
In the time that above-mentioned two preferred versions combine, then can ensure that volume that piston rod promotes storehouse 8 hour, also can ensure good cleaning effect.
embodiment 6
Now be used for the prepolymerized material static mixer of aramid II in conjunction with Fig. 1, Fig. 3 and Fig. 4 explanation:
Comprise mixing bunker 1, the first material inlet 2, the second material inlet 3 and discharging opening 4, described mixing bunker 1 comprises mixing bunker inner chamber 5, mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7 from the inside to the outside; Described discharging opening 4 is arranged on the top of mixing bunker 1, and the bottom of described mixing bunker 1 is provided with piston rod and promotes storehouse 8, and it is mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7 that mixing bunker inner chamber 5 and described piston rod promote between storehouse 8; The bottom of described mixing bunker inner chamber 5 is provided with piston head 9, and piston head 9 bottoms connect piston catch bar 10, and described piston catch bar 10, through mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7, extends to piston rod from mixing bunker 1 and promotes storehouse 8; The bottom that described piston rod promotes storehouse 8 is provided with sealing flange 11.
Preferably, between the neighboring of described piston head 9 and mixing bunker inner chamber 5 surfaces, leave gap, the sectional area in this gap is greater than the summation of first fluid passage 12 and second fluid passage 13 sectional areas.
Preferably or further, described piston head 9 cross sections are circular, are provided with multiple dentation projections 14 in circular periphery.
Interval area between piston head 9 neighborings and mixing bunker inner chamber 5 surfaces be greater than two charging apertures area and, can ensure so normal charging in the time of piston movement.
The cross section of piston head 9 of the present invention is circular, and entirety is in the form of annular discs, in order to strengthen scraping effect, can dentation projection 14 be set in piston head 9 surroundings.Dentation projection 14 can uneven distribution also can be uniformly distributed, and the angle between adjacent dentation projection 14 is 45 degree.Dash area in Fig. 3 and Fig. 4 is the gap between neighboring and mixing bunker inner chamber 5 surfaces of piston head 9, and optimum scheme is for arranging dentation projection 14, because the edge of piston head 9 surroundings more approaches mixing bunker inner chamber 5 surfaces, its scraping effect is better, if but too approaching, the sectional area in gap will reduce, be not enough to be greater than the summation of first fluid passage 12 and second fluid passage 13 sectional areas, and dentation projection 14 be set both met the requirement of gap sectional area, can make again edge more approach mixing bunker inner chamber 5 surfaces, so just solved the problem of two aspects simultaneously.
embodiment 7
Now be used for the prepolymerized material static mixer of aramid II in conjunction with Fig. 1 and Fig. 5 explanation:
Comprise mixing bunker 1, the first material inlet 2, the second material inlet 3 and discharging opening 4, described mixing bunker 1 comprises mixing bunker inner chamber 5, mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7 from the inside to the outside; Described discharging opening 4 is arranged on the top of mixing bunker 1, and the bottom of described mixing bunker 1 is provided with piston rod and promotes storehouse 8, and it is mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7 that mixing bunker inner chamber 5 and described piston rod promote between storehouse 8; The bottom of described mixing bunker inner chamber 5 is provided with piston head 9, and piston head 9 bottoms connect piston catch bar 10, and described piston catch bar 10, through mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7, extends to piston rod from mixing bunker 1 and promotes storehouse 8; The bottom that described piston rod promotes storehouse 8 is provided with sealing flange 11.
Preferably, described piston catch bar 11 bottoms are provided with the connecting portion 15 of screw thread or buckle.
After mixing of materials 2-3 days, need to open sealing flange 12, clear up with Pistons's deposit, so the piston catch bar 11 of piston need to connect the outer pipe fitting of convenient operation.Be provided with the connecting portion 15 of screw thread or buckle in piston catch bar 11 bottoms, this connecting portion 15 can easily, promptly connect screw thread or the buckle of external connecting rod 16 relevant positions, and then can do quickly and easily piston movement, sediment cleaning.
embodiment 8
In conjunction with Fig. 2 explanation, static mixer of the present invention is applied at NMP-CaCl
2in dicyandiamide solution, produce the process of aramid II polymerization thing:
First PPDA is dissolved into NMP-CaCl
2in dicyandiamide solution, form the cryogenic fluid (material A) that PPDA content is 4-8%, enter mixing bunker inner chamber 5 from the first material inlet 2, with the TPC(material B of the molten state entering from the second material inlet 3) there is violent chemical reaction, generate prepolymer.The TPC entering herein accounts for the 20-50% of the needed TPC of whole polymerisations.The prepolymer (material C) mixing through static mixer 101 of the present invention enters pre-polymerization reactor 102 from discharging opening 4 and continues reaction, and flows out to polymer reactor from the outlet of pre-polymerization reactor upper end, carries out polymerisation with the molten state TPC of Part II.Conventionally this reactor adopts double-screw reactor, in double-screw reactor, material is through high speed shear generation vigorous reaction, control reaction temperature at 20-80 DEG C, react and obtain aramid II polymerization thing after 5-20 minute, this polymer is a kind of dry powder solid matter of crumbs shape.
The first charging aperture and the second charging aperture material flow are controlled at 0.5-1.8m/s, this speed can ensure that material does not stop up in fluid passage and charging aperture inner side, by the Position Control of feed blocking, in mixing bunker, therefore the needle valve in background technology just can have been cancelled.
Existing blender in background technology needs repeatedly clear up every day, and stop, the present invention conventionally produces, in the time of 2-3 days, this static mixer 101 is carried out to piston movement one time, remove the oligomer deposit in mixing bunker inner chamber, in scale removal process, produce and proceed, do not need to stop.
The aramid II polymerization thing of producing is carried out to sample analysis (in table 1), and polymer viscosity meets the demands, and result shows that such blender is highly suitable for the continuous polymerization unit of aramid II.
Table 1
Claims (10)
1. one kind for the prepolymerized material static mixer of aramid II, comprise mixing bunker (1), the first material inlet (2), the second material inlet (3) and discharging opening (4), it is characterized in that: described mixing bunker (1) comprises mixing bunker inner chamber (5), mixing bunker inner wall layer (6) and mixing bunker outer wall layer (7) from the inside to the outside; Described discharging opening (4) is arranged on the top of mixing bunker (1), the bottom of described mixing bunker (1) is provided with piston rod and promotes storehouse (8), and it is mixing bunker inner wall layer (6) and mixing bunker outer wall layer (7) that mixing bunker inner chamber (5) and described piston rod promote between storehouse (8); The bottom of described mixing bunker inner chamber (5) is provided with piston head (9), piston head (9) bottom connects piston catch bar (10), described piston catch bar (10), through mixing bunker inner wall layer (6) and mixing bunker outer wall layer (7), extends to piston rod from mixing bunker (1) and promotes storehouse (8); The bottom that described piston rod promotes storehouse (8) is provided with sealing flange (11).
2. one according to claim 1 for the prepolymerized material static mixer of aramid II, is characterized in that: the internal diameter of described discharging opening (4) and the internal diameter of described mixing bunker (1) equate or be greater than the internal diameter of mixing bunker (1).
3. one according to claim 1, for the prepolymerized material static mixer of aramid II, is characterized in that: described the first material inlet (2) and the second material inlet (3) are positioned at differing heights position, and are oppositely arranged.
4. one according to claim 1 for the prepolymerized material static mixer of aramid II, is characterized in that: in described mixing bunker outer wall layer (7), be provided with cooling or add the chuck of thermal material.
5. be used for the prepolymerized material static mixer of aramid II according to the one described in claim 1 or 4, it is characterized in that: described the first charging aperture (2) and the second charging aperture (3) are arranged on the both sides of mixing bunker (1), described the first material inlet (2) is communicated with described mixing bunker inner chamber (5) by the first fluid passage (13) being arranged in mixing bunker outer wall layer (7); Described the second material inlet (3) is communicated with described mixing bunker inner chamber (5) by the second fluid passage (14) being arranged in mixing bunker outer wall layer (7); Described first fluid passage (12) and/or second fluid passage (13) outer setting have cooling or add the chuck of thermal material.
6. one according to claim 1 is for the prepolymerized material static mixer of aramid II, it is characterized in that: the length that described piston rod promotes storehouse (8) equates to the distance of discharging opening (4) with the bottom of mixing bunker inner chamber (5), described piston catch bar (10) extends to the bottom in piston rod promotion storehouse (8) from mixing bunker (1).
7. be used for the prepolymerized material static mixer of aramid II according to the one described in claim 1 or 6, it is characterized in that: the gap that the outer wall of described piston catch bar (10) and piston rod promote the inwall in storehouse (8) is 1-5mm.
8. one according to claim 1 is for the prepolymerized material static mixer of aramid II, it is characterized in that: between the neighboring of described piston head (9) and mixing bunker inner chamber (5) surface, leave gap, the sectional area in this gap is greater than the summation of first fluid passage (12) and second fluid passage (13) sectional area.
9. be used for the prepolymerized material static mixer of aramid II according to the one described in claim 1 or 8, it is characterized in that: described piston head (9) cross section, for circular, is provided with multiple dentation projections (14) in circular periphery.
10. one according to claim 1, for the prepolymerized material static mixer of aramid II, is characterized in that: described piston catch bar (11) bottom is provided with the connecting portion (15) of screw thread or buckle.
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