Summary of the invention
In order to solve the deficiencies in the prior art, an object of the present invention is to provide a kind of extraction tower for polyamide fibre PA6,Slice oligomer is effectively reduced, the Resource regeneration of chinlon 6 section production is realized.
To achieve the goals above, the technical solution of the present invention is as follows:
A kind of extraction tower for polyamide fibre PA6, including upper cone, column-shaped barrel, extraction annular slab component, lower cone, onCone, column-shaped barrel, lower cone combine as a whole from top to bottom and inside communicates, and the cone mouth of upper cone is feed inlet, upper coneSide wall opens up top water outlet, and the cone mouth of lower cone is discharge port, and the side wall of lower cone opens up lower water inlet, extracts annular slabComponent is several extraction annular slabs, several extraction annular slabs and is distributed in the intracorporal different layers of pillar buoy, extracts annular slab and includesLarge and small taper ring flat-plate, fine taper ring flat-plate cover in big taper ring flat-plate, the inner circle edge of big taper ring flat-plate and fine taper ring flat-plate it is outerThe edge of the circle is by link of boards, and the inner circle edge of big taper ring flat-plate is not contacted with the outer circular edge of fine taper ring flat-plate, big taperRing flat-plate outer diameter is equal with column-shaped barrel internal diameter, and the outer diameter of fine taper ring flat-plate is equal with big taper ring flat-plate internal diameter, large and small taper ring flat-plateCone angle be 90 °, extract annular slab axial cross section be it is W-shaped.
The taper ring flat-plate and two ring flat-plates that existing extraction annular slab is generally 40 ° by three cone angles form, and the present invention willExtraction annular slab is changed to the taper ring flat-plate that two cone angles are 90 ° and constitutes, and two taper ring flat-plates are effectively reduced by link of boardsExtraction water circulation resistance, reduces ring flat-plate resistance, is more favorable for the flowing of slice.
Preferably, extraction annular slab is connect by gusset with column-shaped barrel.
Preferably, interior in column-shaped barrel to be equipped with 10 layers of extraction annular slab.
Preferably, the upper portion side wall of column-shaped barrel opens up circulating outlet, the lower sides of column-shaped barrel open up recycle intoThe mouth of a river, circulating outlet connect circulation water inlet by pipeloop.By the way that extraction water recycle circuit is arranged, can effectively controlThe uniformity coefficient of extraction water, to reach the uniform effect of effect of extracting.
It is further preferred that the pipeloop is equipped with water pump.
It is further preferred that the upper portion side wall of column-shaped barrel opens up two opposite circulating outlets, under column-shaped barrelPortion's side wall opens up two opposite circulation water inlets, and ipsilateral circulating outlet is connected with circulation water inlet by pipeloop.
It is further preferred that extraction annular slab from top to bottom presses number of plies sequence, circulating outlet and circulation in column-shaped barrelWater inlet setting is between the 4th layer of extraction annular slab and layer 5 extraction annular slab.
Still more preferably, the column-shaped barrel side wall on the top of the four, the seven, ten layers of extraction annular slab opens up manhole.
Preferably, column-shaped barrel installs heating coil.
Preferably, inner cone is cased in lower cone, the necking down direction of inner cone and the necking down direction of lower cone are identical, inner coneThe top of body is connect with lower cone, and junction is located at the top of lower water inlet, and the other parts of inner cone are hanging, make inner coneAnnular space is formed between body sidewall and lower cone side wall.The purpose is to avoid water from directly entering from the inlet in column-shaped barrelStable extraction water water inlet water flow is played the role of in portion, guarantees that extraction water inlet is uniform.
Preferably, the upper portion side wall of column-shaped barrel opens up top water inlet, and top water outlet connects top water inlet.
The second object of the present invention is to provide a kind of above-mentioned extraction tower to prepare the application in polyamide fibre PA6 technique.
The invention has the benefit that
Improve Temperature Distribution of the slice in extraction tower, strengthen the relative flow state of slice with water, so that slice is in weightPower effect is lower to be come into full contact with upstream extraction water, in the identical situation of bath raio, improve extraction water and chinlon 6 section itBetween heat transfer, mass-transfer efficiency.Meanwhile improvement of the present invention for extraction annular slab, and can reduce the number of plies of extraction annular slab,The piling height of the bulk density and tower interannular that are sliced in extraction tower can also be effectively improved, to reduce containing for slice oligomerAmount.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's showsMeaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is the structural schematic diagram of traditional extraction annular slab；
Fig. 2 is the structural schematic diagram of extraction tower of the present invention；
Fig. 3 is the structural schematic diagram of present invention extraction annular slab；
Wherein, 1, upper cone, 2, cylindrical tube, 3, lower cone, 4, feed inlet, 5, top water outlet, 6, lower part water inletMouthful, 7, discharge port, 8, inner cone, 9, steam inlet, 10, top water inlet, 11, condensation-water drain, 12, circulating outlet, 13,Circulation water inlet, 14, manhole, 15, big taper ring flat-plate, 16, fine taper ring flat-plate, 17, gusset.
Specific embodiment
It is noted that described further below be all exemplary, it is intended to provide further instruction to the application.Unless anotherIt indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical fieldThe identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted rootAccording to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singularAlso it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packetInclude " when, indicate existing characteristics, step, operation, device, component and/or their combination.
Upper cone described herein refers at the top of column-shaped barrel, by column-shaped barrel upward necking down structure that diameter is minimumMouth be upper cone cone mouth.
Lower cone described herein refers to column-shaped barrel bottom, the necking down structure downward by column-shaped barrel, and diameter is minimumMouth be lower cone cone mouth.
As background technique is introduced, the extraction tower heat and mass low efficiency film city of polyamide fibre PA6 exists in the prior artThe deficiency of product quality, in order to solve technical problem as above, present applicant proposes the extraction towers that kind is used for polyamide fibre PA6.
A kind of exemplary embodiment of the application provides a kind of extraction tower for polyamide fibre PA6, including upper cone, columnShape cylinder, extraction annular slab component, lower cone, upper cone, column-shaped barrel, lower cone combine as a whole from top to bottom and internal phaseLogical, the cone mouth of upper cone is feed inlet, and the side wall of upper cone opens up top water outlet, and the cone mouth of lower cone is discharge port, lower coneThe side wall of body opens up lower water inlet, and extraction annular slab component is several extraction annular slabs, several extraction annular slabs and is distributed inThe intracorporal different layers of pillar buoy, extraction annular slab includes large and small taper ring flat-plate, and fine taper ring flat-plate covers in big taper ring flat-plate, greatlyThe outer circular edge of the inner circle edge of taper ring flat-plate and fine taper ring flat-plate by link of boards, and the inner circle edge of big taper ring flat-plate withThe outer circular edge of fine taper ring flat-plate does not contact, and big taper ring flat-plate outer diameter is equal with column-shaped barrel internal diameter, the outer diameter of fine taper ring flat-plateEqual with big taper ring flat-plate internal diameter, the cone angle of large and small taper ring flat-plate is 90 °, and it is W-shaped for extracting the axial cross section of annular slab.
The application will extract annular slab and be changed to the taper ring flat-plate composition that two cone angles are 90 °, and two taper ring flat-plates pass throughLink of boards effectively reduces extraction water circulation resistance, reduces ring flat-plate resistance, is more favorable for the flowing of slice.
Preferably, extraction annular slab is connect by gusset with column-shaped barrel.
Preferably, interior in column-shaped barrel to be equipped with 10 layers of extraction annular slab.
Preferably, the upper portion side wall of column-shaped barrel opens up circulating outlet, the lower sides of column-shaped barrel open up recycle intoThe mouth of a river, circulating outlet connect circulation water inlet by pipeloop.By the way that extraction water recycle circuit is arranged, can effectively controlThe uniformity coefficient of extraction water, to reach the uniform effect of effect of extracting.
It is further preferred that the pipeloop is equipped with water pump.
It is further preferred that the upper portion side wall of column-shaped barrel opens up two opposite circulating outlets, under column-shaped barrelPortion's side wall opens up two opposite circulation water inlets, and ipsilateral circulating outlet is connected with circulation water inlet by pipeloop.
It is further preferred that extraction annular slab from top to bottom presses number of plies sequence, circulating outlet and circulation in column-shaped barrelWater inlet setting is between the 4th layer of extraction annular slab and layer 5 extraction annular slab.
Still more preferably, the column-shaped barrel side wall on the top of the four, the seven, ten layers of extraction annular slab opens up manhole.
Preferably, column-shaped barrel installs heating coil.
Preferably, inner cone is cased in lower cone, the necking down direction of inner cone and the necking down direction of lower cone are identical, inner coneThe top of body is connect with lower cone, and junction is located at the top of lower water inlet, and the other parts of inner cone are hanging, make inner coneAnnular space is formed between body sidewall and lower cone side wall.The purpose is to avoid water from directly entering from the inlet in column-shaped barrelStable extraction water water inlet water flow is played the role of in portion, guarantees that extraction water inlet is uniform.
Preferably, the upper portion side wall of column-shaped barrel opens up top water inlet, and top water outlet connects top water inlet.
The another embodiment of the application provides a kind of above-mentioned extraction tower and is preparing the application in polyamide fibre PA6 technique.
In order to enable those skilled in the art can clearly understand the technical solution of the application, below with reference to toolThe technical solution of the application is described in detail in the embodiment of body.
Traditional extraction annular slab, as shown in Figure 1, the taper ring flat-plate and two ring flat-plates that are 40 ° by three cone angles form.
The present embodiment improves the extraction annular slab, as shown in figure 3, extraction annular slab includes large and small taper ring flat-plate,Fine taper ring flat-plate covers in big taper ring flat-plate, and the inner circle edge of big taper ring flat-plate and the outer circular edge of fine taper ring flat-plate pass through gussetConnection, and the inner circle edge of big taper ring flat-plate is not contacted with the outer circular edge of fine taper ring flat-plate, big taper ring flat-plate outer diameter and cylindricalityCylinder internal diameter is equal, and the outer diameter of fine taper ring flat-plate is equal with big taper ring flat-plate internal diameter, and the cone angle of large and small taper ring flat-plate is 90 °,It is W-shaped for extracting the axial cross section of annular slab.
A kind of extraction tower for polyamide fibre PA6, as shown in Fig. 2, by upper cone 1, the cylindrical tube 2 of DN=2600, extractionAnnular slab, heating coil, condensation water coil, inner cone 8, lower cone 3 is taken to form.Wherein, upper cone 1, cylindrical tube 2, coneShape extraction ring flat-plate, inner cone 8, lower cone 3 combines as a whole from top to bottom and inside communicates, and extraction tower uses low-pressure steam heat tracing,Heating coil material is No. 20 steel, is welded on 2 outer wall of cylindrical tube.Steam lime set after heat exchange condenses passes through hydrophobicValve enters condensation water coil, and coil pipe material is that No. 20 steel are looped around on 2 outer wall of cylindrical tube by being welded.Extraction tower passes throughThe steam pipe coil of 2 outer wall of cylindrical tube is heated, and wherein steam enters heating coil by N6 steam inlet 9, to cylinder2 heat tracing condensed water of shape cylinder enters condensation water coil by drain valve, and is discharged by N7 condensation-water drain 11.
It is respectively open in extraction tower, mainly includes top N1 feed inlet 4, the top N2 water inlet 10, N3 lower water inlet 6, N4Lower water inlet, N5 manhole 14, lower part N8 discharge port 7, N6 steam inlet 9, N7 condensation-water drain, N8 discharge port, the top N9 go outThe mouth of a river 5, wherein middle part is equipped with the support for support；Several thermocouple temperature sensor thermometrics are distributed in 2 top of cylindrical tubeHole.Extraction tower respectively sets the manhole of a DN500 at the four, the seven, ten taper ring flat-plate top cylinders.Totally 10 layers from bottom to top of extraction towerExtract annular slab.
Cylindrical tube, top are discharged using two-way, and lower part is intake using two-way, contraposition Inlet and outlet water are respectively adopted, effectivelyThe uniformity coefficient of extraction water is controlled, to reach the uniform effect of effect of extracting.4th layer is set up separately extraction between layer 5 annular slabThe circulation water inlet 13 and circulating outlet 12 of water intaking, add forced circulation.
Chinlon 6 section enters in tower from N1 feed inlet at the top of extraction tower, makes slice can be uniform by being sliced distributorIt is assigned on extraction tower section.Slice relies on gravity Uniform Flow from top to bottom, forms accumulation on extraction annular slab, cutsPiece is slowly flowed downward by extracting annular slab lower part discharge port.Water temperature is increased to suitable by desalted water under outer heating device effectSuitable temperature enters extraction tower from tower bottom N3 extraction water lower water inlet, forms counter-current flow with slice from bottom to top.
The present embodiment use 10 layers of extraction annular slab, this guarantee be sliced can between tower ring with the state of approximate laminar flow toLower flowing, and there is no dead angle, the slice for being introduced into extraction tower first flows out, and guarantees the stability of chipping qualities.It extracts in annular slabAxis guarantees higher concentricity, can be effectively reduced extraction water resistance, extracts at annular slab feed opening, and flow area narrows,Slice and the relative flow speed of extraction water are accelerated, and form high speed convection, the oligomer for partially depending on slice surface is set in timeIt swaps out, substantially increases extraction efficiency.Into after next layer of extraction annular slab, slice flow velocity is slack-off, stays for some time, lowPolymers is gradually precipitated, and stablizes extraction, so passes through the extraction of several same units, slice oligomer is effectively reduced.
The present embodiment extraction tower top extraction water contains the caprolactam monomer and oligomer of higher concentration, extracts by N9Portion's water outlet waterborne overflows extraction tower, is recycled.The extraction water water of spilling is supplemented by adding desalted water, guarantees extractionThe continuous-stable taken carries out.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this fieldFor art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repairChange, equivalent replacement, improvement etc., should be included within the scope of protection of this application.