CN104147952B - A kind of for aramid II prepolymerized material static mixer - Google Patents
A kind of for aramid II prepolymerized material static mixer Download PDFInfo
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- CN104147952B CN104147952B CN201410413753.5A CN201410413753A CN104147952B CN 104147952 B CN104147952 B CN 104147952B CN 201410413753 A CN201410413753 A CN 201410413753A CN 104147952 B CN104147952 B CN 104147952B
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Abstract
The present invention relates to a kind of for aramid II prepolymerized material static mixer, belong to static mixer equipment technical field.It is mixing bunker inner wall layer and mixing bunker outer wall layer that the bottom of mixing bunker of the present invention be provided with piston rod to promote storehouse, mixing bunker inner chamber and described piston rod to promote between storehouse；The bottom of described mixing bunker inner chamber is provided with piston head, connects piston catch bar bottom piston head, and described piston catch bar passes mixing bunker inner wall layer and mixing bunker outer wall layer, extends to piston rod from mixing bunker and promotes storehouse；Described piston rod promotes the bottom in storehouse to be provided with sealing flange.The static mixer of the present invention can remove oligomer precipitate, prevents material from continuing leakage loss, makes reaction quickly be carried out continuously.
Description
Technical field
The present invention relates to a kind of material static mixer, it is more particularly related to a kind of for aramid II prepolymerized material static mixer, belong to static mixer equipment technical field.
Background technology
E.I.Du Pont Company delivered a kind of high-performance Fanglun 1414, its formal trade name Kafra fiber in 1966, and China is called for short p-aramid fiber, Fanglun l414 or aramid II.Because it has high intensity, high-modulus and the characteristic such as high temperature resistant, it is now widely used in tire cord, high intensity rigging, high-pressure bottle shell, automobile friction, building earth working material, replaces the various enhancing composites of iron and steel, conveyer belt, extraordinary canvas etc..Flak jackets, the helmet, tub, armour plate, radar installations outer housing etc. are such as made at military aspect.Owing to its purposes is quite varied, once it was referred to as " all-round fibre ".
The polymerization process of aramid II is paraphthaloyl chloride (TPC) and p-phenylenediamine (PPDA) reacts in dicyandiamide solution, and it is fast that this reaction has response speed, and therefore the feature that thermal discharge is big is prepared polymer and generally used two-step process.First, PPDA is dissolved in solvent (N-Methyl pyrrolidone containing 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, is then reacted with prepolymer by remaining TPC, obtain final polymer.Being commonly divided into batch process and continuity method obtains polymer, but batch process production efficiency is low, between batch, product quality fluctuation is big, it is adaptable to laboratory, typically uses continuity method in industrialized production.During continuity method produces aramid II polymerization thing, TPC participates in reaction to melt state (more than 82 DEG C), and first part of melted TPC Yu PPDA cryogenic fluid carries out prepolymerization, forms prepolymer.Prepolymer controls to react at low temperature state and with second part of TPC entrance polymer reactor, it is thus achieved that aramid II polymerization thing.
Aramid II polymerization thing is produced in continuity method, during carrying out prepolymerization, when PPDA cryogenic fluid and first part of molten state TPC are reacted, owing in this course of reaction, two kinds of materials exist the biggest temperature difference, should ensure that the temperature of high-temperature material feed end equipment maintains on material fusing point (82 DEG C), otherwise TPC can be changed into solid-state by liquid, and charging aperture blocks；Ensure that low-temperature material end device temperature maintains low temperature state (less than 30 DEG C) again, otherwise extremely strong due to PPDA activity, affect properties of product；Simultaneously because high molecular weight reactive herein is easily generated a small amount of oligomer precipitation, the result of accumulation can cause the blocking of charging aperture or discharging opening, production process thus terminates, and therefore this equipment needs possess the function carrying out the most online internal cleaning aborning, it is to avoid stop.Simultaneously 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 required, do not allow equipment to be chronically at leak condition, affect reactant ratio thus affect properties of product.
Although China has also begun to the research of para-aramid fiber from the eighties in 20th century, certain progress was had been achieved at that time in terms of polymer, but never find suitable mixing apparatus can carry out continuous print polyreaction, thus cause the aramid II polymerization thing intrinsic viscosity produced uneven, the coefficient of dispersion making the mechanical property of fiber is the biggest, it is impossible to reach to use requirement.
It is the utility model patent of CN201140046 that State Intellectual Property Office discloses a notification number on October 29th, 2008, which discloses a kind of material mixer for high temperature difference quick reaction, makes hybrid reaction be smoothed out.And this utility model is applied in aramid fiber production, it is achieved PPTA resin continuous stabilization ground commercial production.This blender includes the mixing bunker in housing, housing, two fluid passages leading to mixing bunker and charging aperture, and the upper end of mixing bunker sets piston storehouse, and there is vertical guide groove the two side of piston, and there is the latch guide groove through piston both sides the upper end of charging aperture.Use this utility model can make two monomers of reaction in solvent and cosolvent with precise stoichiometry coefficient be proportioning continuous-stable mix after enter in polymer reactor, produce the resin of high molecular continuously and stably.
Above-mentioned blender primary concern is that the cleaning to two charging apertures, and is provided with cleaning piston at high-temperature material feed end.But, blender considers deficiency to the clearing function of the deposit of the oligomer during prepolymerization, does not accounts for piston at seal aspect leakage problem that may be present.
Above-mentioned blender does not fully take into account the sealing problem outside piston and mixing bunker.Owing to piston takes regular exercise, therefore its sealing difficulty is relatively big, and the solvent in mixing bunker easily permeates, lubricates simultaneously, and polarity is extremely strong, the seriously corroded to encapsulant, once seal failure generation seepage, then need to produce and stop, and loss is greatly.If do not processed, prepolymer or PPDA solution let out from mixing bunker, and leakage rate is difficult to control to, and during causing subsequent reactions, material proportion is unbalance, affect the quality of polymer.
Summary of the invention
Present invention seek to address that the problem that existing blender exists when aramid II prepolymerization, there is provided one for aramid II prepolymerized material static mixer, reach the most online and remove oligomer precipitate, avoid producing and stop, prevent material from persistently leaking simultaneously, affect reactant ratio thus affect the purpose of polymer quality.
To achieve these goals, the concrete technical scheme of the present invention is as follows:
A kind of for aramid II prepolymerized material static mixer, including mixing bunker, the first material inlet, the second material inlet and discharging opening, it is characterised in that: described mixing bunker includes 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 it is mixing bunker inner wall layer and mixing bunker outer wall layer that the bottom of described mixing bunker be provided with piston rod to promote storehouse, mixing bunker inner chamber and described piston rod to promote between storehouse；The bottom of described mixing bunker inner chamber is provided with piston head, connects piston catch bar bottom piston head, and described piston catch bar passes mixing bunker inner wall layer and mixing bunker outer wall layer, extends to piston rod from mixing bunker and promotes storehouse；Described piston rod promotes the bottom in storehouse to be provided with sealing flange.
The internal diameter of discharging opening of the present invention is equal with the internal diameter of described mixing bunker or more than the internal diameter of mixing bunker.
First material inlet of the present invention and the second material inlet are positioned at differing heights position, and are oppositely arranged.
Cooling or the chuck of heated material it is provided with in mixing bunker outer wall layer of the present invention.
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 by the first fluid passage being arranged in mixing bunker outer wall layer and described mixing bunker inner space；The second described material inlet is by the second fluid passage being arranged in mixing bunker outer wall layer and described mixing bunker inner space；Cooling or the chuck of heated material it is provided with outside described first fluid passage and/or second fluid passage.
The length in piston rod of the present invention promotion storehouse is equal with the distance of the bottom of mixing bunker inner chamber to discharging opening, and described piston catch bar extends to piston rod from mixing bunker and promotes the bottom in storehouse.
The outer wall of piston catch bar of the present invention and piston rod promote the gap of the inwall in storehouse to be 1-5mm.
Leaving gap between neighboring and the mixing bunker surface of internal cavity of piston head of the present invention, the sectional area in this gap is more than first fluid passage and the summation of second fluid channel cross-sectional area.
Piston head cross section of the present invention is circular, and circular periphery is provided with multiple dentation projection.
The connecting portion of screw thread or buckle it is provided with bottom piston catch bar of the present invention.
The Advantageous Effects that the present invention brings:
1, patent high-temperature material side stated in the background arranges needle valve, its sealing difficulty is big, and maintenance of equipment rate is high, once occurs leakage to will result in production and stops, and material easily unrestrictedly leaks out from mixing bunker, cause reactant ratio unbalance thus affect product quality.
The present invention is provided with mixing bunker, charging aperture, fluid passage, discharging opening etc. for aramid II prepolymerized material static mixer, and the piston rod for sealing that has been provided below at mixing bunker promotes storehouse and sealing flange.The original mode carrying out clearing up at high-temperature material charging aperture has been changed into the material piled up at mixing bunker internal cleaning by such structure so that structure is simpler, and device fabrication, maintenance are more prone to.
It addition, piston catch bar is through mixing bunker inwall, mixing bunker outer wall from mixing bunker, extending to piston rod and promote storehouse, gap is the least, serves certain sealing function bottom mixing bunker inwall, and material is difficult to leak out from mixing bunker.
But in common plunger designs, the leakage of material is unavoidable in the motor process of piston, especially for for the PPDA dicyandiamide solution that lubricity and permeability are stronger, accomplish that positive confinement is extremely difficult.Even if mixing bunker described in the present invention has material to leak at piston rod, these materials are concentrated in piston rod and promote in this cushion space sealed of storehouse, and follow-up material would not continue leakage, and formation fully seals, can not process, it is to avoid the loss caused of stopping.Piston rod promotes the cushion space in storehouse the least, and the inventory the leaked out impact on producing is very little.Before static mixer uses, piston head rests on the bottom of mixing bunker, does not interferes with the normal input and output material of mixing bunker.
2, the internal diameter of discharging opening of the present invention is equal with the internal diameter of described mixing bunker or more than the internal diameter of mixing bunker.The main matter of the piston head needs cleaning that this blender is built-in is the deposit of the oligomer that long reaction accumulation is formed in mixing bunker, and this deposit can block material inlet, discharging opening.In scale removal process, this deposit finally needs to be discharged by discharging opening, and the internal diameter of discharging opening ensure that deposit is complete equal to or more than the internal diameter of mixing bunker, is smoothly discharged out, and 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, first material and the inlet amount of the second material and temperature of charge are different, the material charging aperture that high temperature easily solidifies is positioned close to discharge outlet, low-temperature material or the big material charging aperture of inventory are positioned close at piston head, high-temperature material so can be avoided to be deposited on piston head, it is also possible to extend the time that oligomer deposit is formed.
4, cooling or the chuck of heated material it are provided with in mixing bunker outer wall layer of the present invention.Cooling or the chuck of heated material can also be provided with outside described first fluid passage and/or second fluid passage.The chuck arranging cooling or heated material in mixing bunker outer wall layer can control the temperature that material reacts in mixing bunker, thus controls reaction rate, it is ensured that the particular viscosity required for acquisition and the prepolymer of molecular weight distribution.The chuck arranging cooling or heating outside fluid passage can control material temperature before entrance mixing bunker, keeps activity or the form of material.
5, the length in piston rod of the present invention promotion storehouse is equal with the distance of the bottom of mixing bunker inner chamber to discharging opening, and described piston catch bar extends to piston rod from mixing bunker and promotes the bottom in storehouse.Piston rod is so set and promotes the length in storehouse, and the setting of piston catch bar just ensures that the cephalomotor ultimate range of piston reaches at the top discharge mouth of mixing bunker, ensure that deposit is pushed out completely, also be able to ensure the volume minimum that piston rod promotes storehouse simultaneously, reduce loss of material.
6, the outer wall of piston catch bar of the present invention is 1-5mm with the gap of the inwall in piston rod promotion storehouse.First the setting of this interstice coverage ensure that piston catch bar and piston rod to promote between the inwall in storehouse enough spacing, and ensure that external connection bar free motion can will not produce friction after connecting, and does not affect operation；On the other hand ensure that gap is the least so that piston rod promotes storage capacity little, so may infiltrate into piston rod from mixing bunker and promote the inventory in storehouse with regard to few, loss of material is preferably minimized.
7, to compare charging aperture with mixing bunker less for the patent high-temperature material side charging aperture in background technology, in piston scale removal process, the charging area of charging aperture is blocked by major part, therefore affect material charging, be easily formed pulse or directly block, causing both sides material charge proportion unbalance.Gap is left between neighboring and the mixing bunker surface of internal cavity of piston head of the present invention, the sectional area in this gap is more than first fluid passage and the summation of second fluid channel cross-sectional area, it is able to ensure that both sides material feeds unaffected smoothly when piston movement, does not produce pulse.
8, piston head cross section of the present invention is circular, and circular periphery is provided with multiple dentation projection.So arranging first when clearing up material, it is possible to making Odontoid process block edge to greatest extent at charging aperture, the scraping making piston head is in hgher efficiency, the residual of the more preferable oligomer of scraping effect can be less.Also there is gap between dentation projection, it is ensured that between neighboring and the mixing bunker surface of internal cavity of piston head, leave enough gaps simultaneously.
9, the connecting portion of screw thread or buckle it is provided with bottom piston catch bar of the present invention.The structure of screw thread or buckle is easy to piston catch bar and is quickly connected with external connection bar, and simple in construction is convenient to carry out, improves work efficiency.
Accompanying drawing explanation
Fig. 1 is the present invention structural representation for aramid II prepolymerized material static mixer.
Fig. 2 is the present invention use connection figure for aramid II prepolymerized material static mixer.
Fig. 3 is the present invention cross-sectional structure schematic diagram for the mixing bunker inner chamber of aramid II prepolymerized material static mixer, and piston head cross section is circular.
Fig. 4 is the present invention cross-sectional structure schematic diagram for the mixing bunker inner chamber of aramid II prepolymerized material static mixer, and piston head cross section is circular, and the periphery of piston head is provided with multiple dentation projection.
Fig. 5 is the present invention structural representation for the external connection bar of aramid II prepolymerized material static mixer.
Reference: 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 external connection bar, 101 for static mixer, 102 be pre-polymerization reactor.
Detailed description of the invention
Embodiment
1
Illustrate for aramid II prepolymerized material static mixer in conjunction with Fig. 1:
Including mixing bunker the 1, first material inlet the 2, second material inlet 3 and discharging opening 4, described mixing bunker 1 includes 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 it is mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7 that the bottom of described mixing bunker 1 be provided with piston rod to promote storehouse 8, mixing bunker inner chamber 5 and described piston rod to promote between storehouse 8；The bottom of described mixing bunker inner chamber 5 is provided with piston head 9, connects piston catch bar 10 bottom piston head 9, 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；Described piston rod promotes the bottom in storehouse 8 to be provided with sealing flange 11.
The static mixer of the present invention has been independently arranged piston rod and has promoted storehouse 8, piston rod promotes and is separated by mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7 between storehouse 8 and mixing bunker inner chamber 5, the through hole adapted with piston catch bar 10 external diameter is had so that piston catch bar 10 can extend to piston rod through through hole from mixing bunker inner chamber 5 and promote storehouse 8 in mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7.When material mixes, 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.Owing to through hole surrounding has mixing bunker inner wall layer 6, form a platform playing cushioning effect, and the gap between through hole and piston catch bar 10 is the least, so material is difficult to leakage.Even if material leaks, the material of leakage is also focused into piston rod and promotes in storehouse 8, do not leak out, need not stop shut-down, and piston rod promotes limited volume in storehouse 8, when leaked substance fills up piston rod promotion storehouse 8, would not there is material from leakage again, avoiding material to lose in a large number, impact produces and product.After material is mixed with 2-3 days, mixing bunker inner chamber 5 starts oligomer deposit occur, now opens sealing flange 12, moves back and forth with piston, cleans out oligomer deposit.
Embodiment
2
Illustrate for aramid II prepolymerized material static mixer in conjunction with Fig. 1:
Including mixing bunker the 1, first material inlet the 2, second material inlet 3 and discharging opening 4, described mixing bunker 1 includes 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 it is mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7 that the bottom of described mixing bunker 1 be provided with piston rod to promote storehouse 8, mixing bunker inner chamber 5 and described piston rod to promote between storehouse 8；The bottom of described mixing bunker inner chamber 5 is provided with piston head 9, connects piston catch bar 10 bottom piston head 9, 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；Described piston rod promotes the bottom in storehouse 8 to be provided with sealing flange 11.
Preferably, the internal diameter of described discharging opening 4 is equal with the internal diameter of described mixing bunker 1 or more than the internal diameter of mixing bunker 1.The internal diameter of the mixing bunker 1 i.e. diameter of mixing bunker inner chamber 5.So arrange and ensure that deposit is complete, be smoothly discharged out, do not stay dead angle.
Embodiment
3
For aramid II prepolymerized material static mixer:
Including mixing bunker the 1, first material inlet the 2, second material inlet 3 and discharging opening 4, described mixing bunker 1 includes 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 it is mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7 that the bottom of described mixing bunker 1 be provided with piston rod to promote storehouse 8, mixing bunker inner chamber 5 and described piston rod to promote between storehouse 8；The bottom of described mixing bunker inner chamber 5 is provided with piston head 9, connects piston catch bar 10 bottom piston head 9, 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；Described piston rod promotes the bottom in storehouse 8 to be provided with sealing flange 11.
Preferably, the first described material inlet 2 and the second material inlet 3 are positioned at differing heights position, and are oppositely arranged.
Embodiment
4
Illustrate for aramid II prepolymerized material static mixer in conjunction with Fig. 1:
Including mixing bunker the 1, first material inlet the 2, second material inlet 3 and discharging opening 4, described mixing bunker 1 includes 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 it is mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7 that the bottom of described mixing bunker 1 be provided with piston rod to promote storehouse 8, mixing bunker inner chamber 5 and described piston rod to promote between storehouse 8；The bottom of described mixing bunker inner chamber 5 is provided with piston head 9, connects piston catch bar 10 bottom piston head 9, 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；Described piston rod promotes the bottom in storehouse 8 to be provided with sealing flange 11.
Preferably, cooling or the chuck of heated material it are provided with in described mixing bunker outer wall layer 7.
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, and the first described material inlet 2 is connected 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 connected 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 outside being provided with of second fluid passage 13 cool down or the chuck of heated material.
Embodiment
5
Illustrate for aramid II prepolymerized material static mixer in conjunction with Fig. 1:
Including mixing bunker the 1, first material inlet the 2, second material inlet 3 and discharging opening 4, described mixing bunker 1 includes 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 it is mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7 that the bottom of described mixing bunker 1 be provided with piston rod to promote storehouse 8, mixing bunker inner chamber 5 and described piston rod to promote between storehouse 8；The bottom of described mixing bunker inner chamber 5 is provided with piston head 9, connects piston catch bar 10 bottom piston head 9, 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；Described piston rod promotes the bottom in storehouse 8 to be provided with sealing flange 11.
Preferably, the length in described piston rod promotion storehouse 8 is equal to the distance of discharging opening 4 with the bottom of mixing bunker inner chamber 5, and described piston catch bar 10 extends to piston rod from mixing bunker 1 and promotes the bottom in storehouse 8.
Preferably or further, the outer wall of described piston catch bar 10 and piston rod promote the gap of inwall in storehouse 8 to be 1-5mm.
The outer wall of above-mentioned piston catch bar 10 and piston rod promote the gap of the inwall in storehouse 8 can be 1,2,3,4,5mm.
When above-mentioned two preferred version combines, then when ensure that the volume minimum in piston rod promotion storehouse 8, it is also possible to ensure good cleaning effect.
Embodiment
6
In conjunction with Fig. 1, Fig. 3 and Fig. 4 explanation for aramid II prepolymerized material static mixer:
Including mixing bunker the 1, first material inlet the 2, second material inlet 3 and discharging opening 4, described mixing bunker 1 includes 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 it is mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7 that the bottom of described mixing bunker 1 be provided with piston rod to promote storehouse 8, mixing bunker inner chamber 5 and described piston rod to promote between storehouse 8；The bottom of described mixing bunker inner chamber 5 is provided with piston head 9, connects piston catch bar 10 bottom piston head 9, 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；Described piston rod promotes the bottom in storehouse 8 to be provided with sealing flange 11.
Preferably, leaving gap between neighboring and mixing bunker inner chamber 5 surface of described piston head 9, the sectional area in this gap is more than first fluid passage 12 and the summation of second fluid passage 13 sectional area.
Preferably or further, described piston head 9 cross section is circular, and circular periphery is provided with multiple dentation projection 14.
Interval area between piston head 9 neighboring and mixing bunker inner chamber 5 surface more than two charging apertures area and, so can ensure that and normally feed when piston movement.
The cross section of the piston head 9 of the present invention is circular, overall in the form of annular discs, in order to strengthen scraping effect, can arrange dentation projection 14 in piston head 9 surrounding.Dentation projection 14 can also be able to be uniformly distributed with uneven distribution, and the angle between adjacent dentation projection 14 is 45 degree.Dash area in figs. 3 and 4 is the gap between the neighboring of piston head 9 and mixing bunker inner chamber 5 surface, and the scheme of optimum is for arranging dentation projection 14, because the edge of piston head 9 surrounding is closer to mixing bunker inner chamber 5 surface, its scraping effect is the best, if but get too close to, the sectional area in gap will reduce, it is not enough to more than first fluid passage 12 and the summation of second fluid passage 13 sectional area, and dentation projection 14 is set and had both met the requirement of gap sectional area, edge can be made again to be more nearly mixing bunker inner chamber 5 surface, problem of both the most simultaneously solving.
Embodiment
7
In conjunction with Fig. 1 and Fig. 5 explanation for aramid II prepolymerized material static mixer:
Including mixing bunker the 1, first material inlet the 2, second material inlet 3 and discharging opening 4, described mixing bunker 1 includes 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 it is mixing bunker inner wall layer 6 and mixing bunker outer wall layer 7 that the bottom of described mixing bunker 1 be provided with piston rod to promote storehouse 8, mixing bunker inner chamber 5 and described piston rod to promote between storehouse 8；The bottom of described mixing bunker inner chamber 5 is provided with piston head 9, connects piston catch bar 10 bottom piston head 9, 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；Described piston rod promotes the bottom in storehouse 8 to be provided with sealing flange 11.
Preferably, the connecting portion 15 of screw thread or buckle it is provided with bottom described piston catch bar 11.
Owing to material mixing needs to open sealing flange 12 after 2-3 days, clear up with Pistons's deposit, so the piston catch bar 11 of piston needs to connect outer pipe fitting convenient to operate.Being provided with the connecting portion 15 of screw thread or buckle bottom piston catch bar 11, this connecting portion 15 can easily, promptly connect screw thread or the buckle of external connecting rod 16 relevant position, and then can do piston movement, sediment cleaning quickly and easily.
Embodiment
8
In conjunction with Fig. 2 explanation, the static mixer of the present invention is applied at NMP-CaCl2The process of production aramid II polymerization thing in dicyandiamide solution:
First PPDA is dissolved into NMP-CaCl2In 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 entered from the second material inlet 3) there is violent chemical reaction, generate prepolymer.The 20-50% of TPC required for whole polyreaction is accounted at the TPC entered here.Prepolymer (material C) through static mixer 101 of the present invention mixing enters pre-polymerization reactor 102 from discharging opening 4 and continues reaction, and flows out to polymer reactor from pre-polymerization reactor upper end outlet, carries out polyreaction with molten state TPC of Part II.Generally this reactor uses double-screw reactor, in double-screw reactor, material is through high speed shear generation vigorous reaction, control reaction temperature, at 20-80 DEG C, obtains aramid II polymerization thing after reacting 5-20 minute, and this polymer is the dry powder solid matter of a kind of breadcrumb shape.
First charging aperture and the second charging aperture material flow control at 0.5-1.8m/s, this speed can ensure that material does not blocks inside fluid passage and charging aperture, by the position control of feed blocking in mixing bunker, therefore the needle valve in background technology just can eliminate.
Existing blender in background technology needs repeatedly clear up every day, and to stop, the present invention generally produces, every 2-3 days when, this static mixer 101 is carried out a piston movement, remove the oligomer deposit in mixing bunker inner chamber, scale removal process produces and proceeds, it is not necessary to stop.
Being sampled analyzing (see Table 1) to the aramid II polymerization thing produced, polymer viscosity meets requirement, and result shows that such blender is highly suitable for the continuous polymerization unit of aramid II.
Table 1
Claims (8)
1. one kind is used for aramid II prepolymerized material static mixer, including mixing bunker (1), the first material inlet (2), the second material inlet (3) and discharging opening (4), it is characterised in that: described mixing bunker (1) includes 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), it is mixing bunker inner wall layer (6) and mixing bunker outer wall layer (7) that the bottom of described mixing bunker (1) be provided with piston rod to promote storehouse (8), mixing bunker inner chamber (5) and described piston rod to 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) passes 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)；Described piston rod promotes the bottom in storehouse (8) to be provided with sealing flange (11)；The length of described piston rod promotion storehouse (8) is equal to the distance of discharging opening (4) with the bottom of mixing bunker inner chamber (5), and described piston catch bar (10) extends to piston rod from mixing bunker (1) and promotes the bottom in storehouse (8)；The outer wall of described piston catch bar (10) and piston rod promote the gap of the inwall in storehouse (8) to be 1-5mm.
One the most according to claim 1 be used for aramid II prepolymerized material static mixer, it is characterised in that: the internal diameter of described discharging opening (4) equal with the internal diameter of described mixing bunker (1) or be more than mixing bunker (1) internal diameter.
One the most according to claim 1 is used for aramid II prepolymerized material static mixer, it is characterised in that: described the first material inlet (2) and the second material inlet (3) are positioned at differing heights position, and are oppositely arranged.
One the most according to claim 1 is used for aramid II prepolymerized material static mixer, it is characterised in that: it is provided with cooling or the chuck of heated material in described mixing bunker outer wall layer (7).
5. according to the one described in claim 1 or 4 for aramid II prepolymerized material static mixer, it is characterized in that: described the first material inlet (2) and the second material inlet (3) are arranged on the both sides of mixing bunker (1), described the first material inlet (2) is connected with described mixing bunker inner chamber (5) by the first fluid passage (12) being arranged in mixing bunker outer wall layer (7)；Described the second material inlet (3) is connected with described mixing bunker inner chamber (5) by the second fluid passage (13) being arranged in mixing bunker outer wall layer (7)；Described first fluid passage (12) and/or outside being provided with of second fluid passage (13) cool down or the chuck of heated material.
One the most according to claim 1 is used for aramid II prepolymerized material static mixer, it is characterized in that: leave gap between neighboring and mixing bunker inner chamber (5) surface of described piston head (9), the sectional area in this gap is more than first fluid passage (12) and the summation of second fluid passage (13) sectional area.
7. according to the one described in claim 1 or 6 for aramid II prepolymerized material static mixer, it is characterised in that: described piston head (9) cross section is circular, and circular periphery is provided with multiple dentation projection (14).
One the most according to claim 1 is used for aramid II prepolymerized material static mixer, it is characterised in that: described piston catch bar (10) bottom is provided with the connecting portion (15) of screw thread or buckle.
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| CN106190769B (en) * | 2015-04-30 | 2018-08-31 | 奥然生物科技（上海）有限公司 | A kind of material point deposits formula mixing arrangement |
| CN105841984A (en) * | 2016-03-18 | 2016-08-10 | 中国石油天然气股份有限公司 | Polymer injection allocation technology equipment detection evaluation apparatus |
| CN110684192B (en) * | 2019-11-07 | 2021-09-03 | 蓝星（成都）新材料有限公司 | P-phenylenediamine dissolving system and method for continuous polymerization of aramid fibers 1414 |
| CN112201903A (en) * | 2019-11-26 | 2021-01-08 | 中蓝晨光化工研究设计院有限公司 | High-performance polyaramide lithium battery diaphragm coating based polymerization solution and preparation method and application thereof |
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| DE102010027052A1 (en) * | 2010-07-13 | 2012-01-19 | Bayer Materialscience Ag | Process for the preparation of isocyanate group-containing polyurethane prepolymers |
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| DE3600273A1 (en) * | 1986-01-08 | 1987-07-09 | Basf Ag | Device for generating a preferably chemically reactive mixture of at least two plastic components |
| WO2003095952A1 (en) * | 2002-05-07 | 2003-11-20 | Ben Bremauer | Apparatus for mixing and/or testing small volumes of fluids |
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