CN207012604U - A kind of nylon chips extraction equipment and production line - Google Patents
A kind of nylon chips extraction equipment and production line Download PDFInfo
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- CN207012604U CN207012604U CN201720605417.XU CN201720605417U CN207012604U CN 207012604 U CN207012604 U CN 207012604U CN 201720605417 U CN201720605417 U CN 201720605417U CN 207012604 U CN207012604 U CN 207012604U
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Abstract
The utility model discloses a kind of nylon chips extraction equipment and production line, belong to chemical field, including static mixer, evaporate reactor, tubular reactor, finished product reactor, screw extruder, pelleter, extraction equipment and drying device, head tank is arranged at the top of extraction tower, extraction tower top EGR is arranged on the extraction tower upper area, extraction tower bottom EGR and pure hot water water supply installation are arranged on extraction tower bottom, centrifugal separating device charging aperture is connected with extraction tower bottom, centrifugal separating device delivery port is connected with the water inlet of pure hot water water supply installation.The beneficial effects of the utility model are：Extraction tower is divided into two parts up and down using baffle plate, reduce the exchange between the cleaning solution of top and the bottom, realize that cleaning level compares clearly two-stage cleaning, and cause nylon chips during the mobile bottom under top, due to the effect of baffle plate, reduce intermediate openings, improve the flow velocity of current, realize the cleaning of local larger efficiency.
Description
Technical field
It the utility model is related to chemical field, more particularly to a kind of nylon chips extraction equipment and production line.
Background technology
Nylon material is because its unique performance advantage is widely used in spinning, injection and film product, and nylon-6 is by making
Carry out commodity production by the use of caprolactam as initiation material, the technique typically comprise by caprolactam in VK pipes in air
Heated 12 to 24 hours under pressure, this technique productions goes out the nylon-6 product containing 7-10% caprolactams in the product.It is surplus
Remaining caprolactam was extracted by using 8~12 hours aqueous solution extraction technique, then the product of extraction is dried 8 to 12 hours,
The desciccate containing 0.2 to 0.3% caprolactam is produced, although the technique is commercially available success, nylon-6
The purification of product is that the purification by liquid extraction improvement of nylon product is always to influence nylon finished product the process adds sizable spending
The very crucial factor of quality.
Publication No. CN1538984A application for a patent for invention discloses a kind of production method of nylon 6, wherein containing master
Want the caprolactam of part and/or the feed stream of the prepolymer of nylon 6 and the ACN of secondary part be added into it is multistage
Section reactive distillation column in, in tower feed stream by with steam stream be in adverse current in a manner of flow.Although this patent passes through reduction
The purification step of intermediate product, but it finally gives the purity of nylon and is in reduced levels, can influence nylon final product quality.
And for example CN1513016A application for a patent for invention discloses the method that one kind prepares nylon 6,6, by adiponitrile and
The reaction of hexamethylene diamine and water in counter-flow multi-level tower reactor, prepare polyamide (nylon 6,6 and single containing copolymerization
The nylon 6,6 of body).The adiponitrile by being reacted with the water of dissolving to hydrolyze, the water be by with adiponitrile and later reaction
The flow direction of product keeps the steam of reverse flow to supply and supplement, then adiponitrile hydrolysate and hexamethylene diamine
It polymerize under the operating condition of tower and forms nylon 6,6 polyamide.But this patent do not introduce to extraction nylon chips it is water-soluble
The recovery of liquid and recycle.
For another example CN101768266A application for a patent for invention discloses a kind of preparation method of semi-aromatic nylon, including as follows
Step：(1) aliphatic diamine is well mixed with 2~10 times of water, is heated to 50~90 DEG C, adds aromatic series under agitation
Binary acid, until solution ph reaches 7.0~7.7, after continuing stirring 1~5 hour, being cooled to room temperature, to be further continued for stirring 1~5 small
When, it is standby that nylon salt is obtained after filtration drying；(2) obtained nylon salt and solvent are pressed into certain proportioning (0.5~3.0g/mL)
Polymeric kettle is added, is warming up to 190~230 DEG C under inert gas shielding, it is 2.0~3.0MPa to keep in kettle pressure, 1~5 hour
After deflate, pressure in kettle was down to normal pressure in 1~5 hour, then heat to 210~270 DEG C and continue reaction 1~5 hour, go out
Material obtains powdered semi-aromatic nylon product.But this patent is not introduced the recovery to extracting the nylon chips aqueous solution yet and followed
Ring utilizes.
Utility model content
To overcome, nylon finished product impurity content present in prior art is high, second-rate, cleaning solution utilization rate is not high
The problems such as, the utility model provides a kind of nylon chips extraction equipment, including head tank, extraction tower, the circulation of extraction tower top
Device, extraction tower bottom EGR, pure hot water water supply installation and centrifugal separating device, the head tank are arranged on the extraction
Top of tower, extraction tower top EGR are arranged on the extraction tower upper area, extraction tower bottom EGR
Be arranged on the extraction tower bottom with the pure hot water water supply installation, the centrifugal separating device charging aperture with the extraction tower
Portion is connected, and the centrifugal separating device delivery port is connected with the water inlet of the pure hot water water supply installation.Nylon chips are by extraction
Take tower top EGR, extraction tower bottom EGR to liquidate twice extraction, remove most small molecules of slice surface
Filter is equipped with polymer, extraction tower top EGR and extraction tower bottom EGR, passes through filter pair
Molecular weight polymers in recirculated water are filtered, and are less than molecular weight polymers content of the recirculated water before extraction section is rinsed
0.005%, so as to realize the recycling of water.
Further, inwall is provided with the baffle plate tilted down in the middle part of the extraction tower, and the baffle plate is located at the extraction tower
Below the EGR of top, extraction tower is divided into two parts up and down using baffle plate so that nylon chips are in extraction tower top and the bottom
The exchange between the cleaning solution of top and the bottom is reduced, realizes that cleaning level compares clearly two-stage in different cleaning environment in other places
Cleaning, and cause nylon chips during the mobile bottom under top, due to the effect of baffle plate, to subtract intermediate openings
It is small, the flow velocity of current is improved, realizes the cleaning of local larger efficiency.
Further, extraction tower top EGR includes the first delivery pump, first filter and primary heater, institute
The first conveying pump intake is stated with being connected at the top of the extraction tower, the first filter entrance pumps out with the described first conveying
Mouth is connected, and the primary heater entrance is connected with first filter outlet, the primary heater outlet and the extraction
Take and be connected in the middle part of tower.
Further, the first filter is provided with acupuncture filter material, by 40~80wt% polyester fiber and 20~
60wt% polypropylene fiber obtains through acupuncture, calen-dering process.Using acupuncture filter material, mixed by polyester fiber and polypropylene fiber
To close, acupuncture makes mutually to wind between fiber, forms the space structure based on polyester fiber, recycle the melting of polypropylene fiber,
Make it that polyester fiber crossover node to be fixed, so as to form firm three dimensions filtration.
Further, the porosity of the acupuncture filter material is 60~90%, and pore diameter is less than 0.3mm.
Further, the thickness of the acupuncture filter material is 0.5~1.5cm, and grammes per square metre is 100~300g/cm2。
Further, the polyester fiber is distributed in more than three kinds of cross fiber type in the range of 0.5~3D using fineness
For the polyester fiber quality accounting of composition, wherein fineness more than 1.5D more than 50%, the length of polyester fiber is 37~51mm.
Further, the polypropylene fiber fineness is 1-2D, preferably 2D；Length is 35-48mm, preferably 38mm.Using
The polyester fiber of different thicknesses mixes by a certain percentage with polypropylene fiber, by needling process be designed into using polyester fiber as
The space structure of network skeleton, then by calen-dering process, polypropylene fiber melting is attached at the crossover node of polyester fiber, shape
Into the three dimensions filter frame of stabilized structure, molecular weight polymers of the diameter more than 0.3mm can be effectively prevented to pass through realization pair
The filtering of recirculated water.
Further, extraction tower bottom EGR includes secondary heater, the secondary heater entrance with it is described
Extraction tower is connected close to bottom sides, and the secondary heater outlet is connected with the extraction tower bottom.
Further, the pure hot water water supply installation includes hopper, the second delivery pump, the second filter, the hopper
Water inlet is connected with the centrifugal separating device delivery port, the hopper delivery port and the second delivery pump water inlet phase
Even, the second filter water inlet is connected with the delivery pump delivery port, the second filter delivery port and the extraction
Tower bottom is connected.Second filter use with first filter identical structure and material, but its fibre fineness for using and
Pore diameter is respectively less than first filter, and the fineness of preferred polyester fiber is distributed in more than three kinds in the range of 0.5~3D here
Cross fiber type composition, wherein fineness less than 1.5D polyester fiber quality accounting more than 80%, the length of polyester fiber
For 37~51mm, and the porosity of the acupuncture filter material is 60~90%, and pore diameter is less than 0.1mm.Due to the first mistake
Filter and the second filter are respectively for front and rear extraction and recovery liquid twice, the content and diameter of its recovered liquid small molecular polymer
Be in different conditions, be molecular weight polymers content height the characteristics of recovered liquid in the EGR of extraction tower top, diameter compared with
Greatly, and molecular weight polymers diameter otherness it is larger, molecular weight polymers quality accounting of its diameter in more than 0.3mm exceedes
60%, thus the target of first filter be mainly realize to these diameters more than 0.3mm molecular weight polymers filtering；And extract
The characteristics of taking the recovered liquid in the EGR of tower bottom is then that molecular weight polymers content is relatively low, and diameter is smaller, and small point
The otherness of sub- polymer diameter is smaller, and boy of its diameter more than 0.1~0.3 divides polymer quality accounting more than 70%,
Therefore the target of the second filter then be realize to diameter more than 0.1mm molecular weight polymers filtering.
Further, the extraction tower bottom water inlet is provided with changeover valve.
The utility model also provides a kind of nylon chips production line, includes static mixer, evaporation successively instead from front to back
Answer device, tubular reactor, finished product reactor, screw extruder, pelleter, extraction equipment and drying device.
Further, the drying device includes continuous drying tower, star-like drawing mechanism, cooling feed bin successively from top to bottom,
The continuous drying tower top is provided with hot N2Drying system, the hot N2Drying system includes the first N2Filter, first circulation wind
Machine, the first N2Heater, the first N2Filter inlet is connected with the continuous drying top of tower, the first circulation blower fan
Entrance and the first N2Filter outlet connects, the first N2Calorifier inlets are connected with the first circulation fan outlet,
First N2Heater outlet is dried with the connection and connected in the middle part of tower side wall.Pass through hot N2The moisture content of wet slice surface is taken away,
And pass through the first N2Filter removes N2In moisture content, reuse the first N2Heater is to N2Concurrent heating is carried out, is realized to hot N2Dry
N in system2Recycling.
Further, the second hot N is additionally provided with the continuous drying tower2Drying system, the 2nd N2Drying system includes the
One heat sink, the second heat sink, second circulation blower fan and the 2nd N2Heater, the first heat sink entrance with it is described
First circulation fan outlet connects, and the second heat sink entrance is connected with first heat sink outlet, and described second
Circulating fan entrance is connected with the outlet of institute's the second heat sink of art, the 2nd N2Calorifier inlets and the second circulation blower fan
Outlet is connected, the 2nd N2Heater outlet is connected with the continuous drying tower bottom.Second hot N2Pass through two in drying system
Secondary cooling design, makes N2Temperature be reduced to below dew point, isolate N2In moisture content, then by heating make N2Temperature reach
140~160 DEG C, enter from continuous drying tower bottom, redrying is carried out to nylon chips.
Further, second heat sink is provided with condensation zone, and the condensation zone is led to by a plurality of condensation in bending
Road forms, every section of condensation passage by multistage condensation section composition, the angle between adjacent two sections of condensation sections is 30~
60°.By designing condensation zone, make N after cooling2Baffle plate with each section of condensation section in condensation zone fully contacts, N2In water
Stay in and dew is formed on baffle plate, so as to realize N2With the separation of moisture content.
Further, the cooling feed bin is provided with N2Cooling system, the N2Cooling system includes the 2nd N2It is filter, cold
But blower fan and N2Cooler, the 2nd N2Filter inlet with it is described cooling feed bin at the top of be connected, the cooling blower entrance and
2nd N2Filter outlet is connected, the N2Cooler entrance is connected with cooling blower outlet, the N2Cooler goes out
Mouth is connected with the cooling bin bottom.By setting N on cooling feed bin2Cooling system, not only realize to dry chip finished product
Cooling, and also achieve drying again to dry chip, further improve the quality of final finished.
Further, the first N2One layer of moisture content sorbing material is provided with filter, using carbon fibre composite conduct
Skeleton, and needling process is used in surface attachment activated carbon granule, the carbon fibre composite, its thickness is in 1cm-5cm, hole
The control of gap radius is controlled in 0.05-0.1mm in below 0.5mm, the wherein size of activated carbon granule, and it accounts for carbon fibre composite
Less than the 30% of gross mass, preferably 25%.
The utility model also provides a kind of production method using above-mentioned nylon chips production line, comprises the following steps：
Step 1：By liquid caprolactam, initiator, delustering agent, stabilization agent and antioxidant in static mixer fully
Mixing, mixing temperature are 90~150 DEG C, and incorporation time is controlled in 1-3h；
Step 2：By well mixed composition successively through evaporating reactor and tubular reactor, slow heating makes combination
The temperature of thing progressively increases to more than 250 DEG C, controls between 250~270 DEG C, wherein the temperature of evaporation reactor for 260~
270 DEG C, the temperature of tubular reactor is 250~260 DEG C, and the pressure of adjustment control evaporation reactor and tubular reactor is 2-
4bar, reaction time 3-5h；
Step 3：Pass through finished product reactor again, temperature control is at 230~250 DEG C, and pressure 1-2bar, time control is in 5-
7h, obtain nylon final product mix；
Step 4：Nylon final product mix is plastified through screw extruder and extruded, then is cut into nylon chips through pelleter；
Step 5：Nylon chips are extracted through extraction equipment again, are removed the low polymer in section, are made its low point
The content of sub- polymer is less than 0.03%, then processing is dried to wet section, obtains required nylon chips.
Compared with prior art, the beneficial effects of the utility model are：
(1) nylon chips liquidate extraction twice by extraction tower top EGR, extraction tower bottom EGR, removal
It is equipped with most molecular weight polymers of slice surface, extraction tower top EGR and extraction tower bottom EGR
Filter, the molecular weight polymers in recirculated water are filtered by filter, recirculated water is being rinsed extraction section
Preceding molecular weight polymers content is less than 0.005%, so as to realize the recycling of water；
(2) mixed with polypropylene fiber using the polyester fiber of different thicknesses, set by needling process by a certain percentage
The space structure using polyester fiber as network skeleton is counted into, then by calen-dering process, polypropylene fiber melting is attached on terylene fibre
At the crossover node of dimension, the three dimensions filter frame of stabilized structure is formed, the small molecule that can effectively prevent diameter from being more than 0.3mm
Polymer is by realizing the filtering to recirculated water；
(3) it is small in its recovered liquid because first filter and the second filter are respectively for front and rear extraction and recovery liquid twice
The content and diameter of Molecularly Imprinted Polymer are in different conditions, are small point the characteristics of recovered liquid in the EGR of extraction tower top
Sub- polymer content is high, is relatively large in diameter, and the otherness of molecular weight polymers diameter is larger, and its diameter is in the small of more than 0.3mm
Molecule aggregation amount of substance accounting is more than 60%, therefore the target of first filter is mainly realized to these diameters in more than 0.3mm
The filtering of molecular weight polymers；And the characteristics of recovered liquid in the EGR of extraction tower bottom is then molecular weight polymers content phase
To relatively low, diameter is smaller, and the otherness of molecular weight polymers diameter is smaller, and boy of its diameter more than 0.1~0.3 point is poly-
Compound quality accounting is more than 70%, therefore the target of the second filter is realized to diameter in more than 0.1mm molecular weight polymers
Filtering；
(4) hot N is passed through2The moisture content of wet slice surface is taken away, and passes through the first N2Filter removes N2In moisture content, then make
With the first N2Heater is to N2Concurrent heating is carried out, is realized to hot N2N in drying system2Recycling；
(5) second hot N2Designed in drying system by reducing temperature twice, make N2Temperature be reduced to below dew point, isolate
N2In moisture content, then by heating make N2Temperature reach 140~160 DEG C, from continuous drying tower bottom enter, to nylon chips
Carry out redrying；
(6) by designing condensation zone, N after cooling is made2Baffle plate with each section of condensation section in condensation zone fully contacts,
N2In water stay in dew formed on baffle plate, so as to realize N2With the separation of moisture content；
(7) by setting N on cooling feed bin2Cooling system, not only realize the cooling to dry chip finished product, Er Qieshi
Show drying again to dry chip, further improve the quality of final finished.
Brief description of the drawings
Fig. 1 is the utility model preferably production line structure chart；
Fig. 2 is the utility model preferably extraction equipment structure chart；
Fig. 3 is the utility model preferably drying device structure chart；
Fig. 4 is the utility model preferably condensation zone structure chart.
Embodiment
Below in conjunction with drawings and examples, the utility model is further elaborated.It should be appreciated that this place is retouched
The specific embodiment stated only to explain the utility model, is not used to limit the utility model.
Be as shown in Figure 1 the utility model preferably production line structure chart, include successively from front to back static mixer 1,
Reactor 2, tubular reactor 3, finished product reactor 4, screw extruder 5, pelleter 6, extraction equipment 7 and drying device 8 are evaporated,
As shown in Fig. 2 the extraction equipment 7 includes head tank 11, extraction tower 12, extraction tower top EGR 13, extraction tower bottom
EGR 14, pure hot water water supply installation 15 and centrifugal separating device 16, the head tank 11 are arranged on the extraction tower 12 and pushed up
Portion, extraction tower top EGR 13 are arranged on the upper area of extraction tower 12, extraction tower bottom EGR
14 and the pure hot water water supply installation 15 be arranged on the bottom of extraction tower 12, the charging aperture of centrifugal separating device 16 with it is described
The bottom of extraction tower 12 is connected, and the delivery port of centrifugal separating device 16 is connected with the water inlet of the pure hot water water supply installation 15.
Extraction that nylon chips pass through extraction tower top EGR 13, extraction tower bottom EGR 14 liquidates twice, goes
Except most molecular weight polymers of slice surface, in extraction tower top EGR 13 and extraction tower bottom EGR 14
Filter is equipped with, the molecular weight polymers in recirculated water are filtered by filter, recirculated water is being rinsed extraction
The molecular weight polymers content before section is taken to be less than 0.005%, so as to realize the recycling of water.
As a preferred embodiment, the middle part inwall of extraction tower 12 is provided with the baffle plate 26 tilted down, institute
State baffle plate 26 and be located at the lower section of extraction tower top EGR 13, extraction tower 12 is divided into two parts up and down using baffle plate 26,
So that nylon chips are respectively at different cleaning environment in the top and the bottom of extraction tower 12, the friendship between the cleaning solution of top and the bottom is reduced
Change, realize that cleaning level compares clearly two-stage cleaning, and cause nylon chips during the mobile bottom under top,
Due to the effect of baffle plate, reduce intermediate openings, improve the flow velocity of current, realize the cleaning of local larger efficiency.
As a preferred embodiment, extraction tower top EGR 13 includes the first delivery pump 17, first
Filter 18 and primary heater 19, the entrance of the first delivery pump 17 are connected with the top of the extraction tower 12, and described the
The entrance of one filter 18 is connected with first delivery pump 18 outlet, the entrance of primary heater 19 and the first filter
18 outlets are connected, and the outlet of primary heater 19 is connected with the middle part of extraction tower 12.
As a preferred embodiment, the first filter 18 is provided with acupuncture filter material, by 40~
80wt% polyester fiber obtains with 20~60wt% polypropylene fiber through acupuncture, calen-dering process.
Using acupuncture filter material, mixed by polyester fiber with polypropylene fiber, acupuncture makes mutually to wind between fiber, is formed
Space structure based on polyester fiber, the melting of polypropylene fiber is recycled, it is consolidated polyester fiber crossover node
It is fixed, so as to form firm three dimensions filtration.
As a preferred embodiment, by optimizing design to acupuncture filter material, its filter efficiency is improved,
The porosity of the acupuncture filter material is 60~90%, and pore diameter is less than 0.3mm.The thickness of the acupuncture filter material is
0.5~1.5cm, grammes per square metre are 100~300g/cm2.The polyester fiber is distributed in three kinds in the range of 0.5~3D using fineness
Cross fiber type composition above, wherein fineness are more than 1.5D polyester fiber quality accounting more than 50%, polyester fiber
Length is 37~51mm.The polypropylene fiber fineness is 1-2D, preferably 2D；Length is 35~48mm, preferably 38mm.
Mixed with polypropylene fiber using the polyester fiber of different thicknesses, be designed into by needling process by a certain percentage
Space structure using polyester fiber as network skeleton, then by calen-dering process, polypropylene fiber melting is attached on polyester fiber
At crossover node, the three dimensions filter frame of stabilized structure is formed, can effectively prevent small molecule of the diameter more than 0.3mm from polymerizeing
Thing is by realizing the filtering to recirculated water.
As a preferred embodiment, extraction tower bottom EGR 14 includes secondary heater 21, it is described
The entrance of secondary heater 21 is connected with the extraction tower 12 close to bottom sides, the outlet of secondary heater 21 and the extraction
The bottom of tower 12 is connected.
As a preferred embodiment, the pure hot water water supply installation 15 include hopper 22, the second delivery pump 23,
Second filter 24, the water inlet of hopper 22 are connected with the delivery port of centrifugal separating device 16, and the hopper 22 goes out
The mouth of a river is connected with the water inlet of the second delivery pump 23, the water inlet of the second filter 24 and the water outlet of the second delivery pump 24
Mouth is connected, and the delivery port of the second filter 24 is connected with the bottom of extraction tower 12.
Second filter 24 using and first filter identical structure and material, but its fibre fineness for using and hole
Gap diameter is respectively less than first filter, and the fineness of preferred polyester fiber is distributed in more than three kinds in the range of 0.5~3D here
Cross fiber type forms, and more than 80%, the length of polyester fiber is wherein polyester fiber quality accounting of the fineness less than 1.5D
37~51mm, and the porosity of the acupuncture filter material is 60~90%, pore diameter is less than 0.1mm.Due to the first filtering
Extraction and recovery liquid, the content and diameter of its recovered liquid small molecular polymer are equal twice for before and after respectively for device and the second filter
In different conditions, it is molecular weight polymers content height the characteristics of recovered liquid in the EGR of extraction tower top, is relatively large in diameter,
And the otherness of molecular weight polymers diameter is larger, molecular weight polymers quality accounting of its diameter in more than 0.3mm exceedes
60%, thus the target of first filter be mainly realize to these diameters more than 0.3mm molecular weight polymers filtering；And extract
The characteristics of taking the recovered liquid in the EGR of tower bottom is then that molecular weight polymers content is relatively low, and diameter is smaller, and small point
The otherness of sub- polymer diameter is smaller, and boy of its diameter more than 0.1~0.3 divides polymer quality accounting more than 70%,
Therefore the target of the second filter then be realize to diameter more than 0.1mm molecular weight polymers filtering.
As a preferred embodiment, the bottom water inlet of extraction tower 12 is provided with changeover valve 25.
The utility model preferably drying device structure chart is illustrated in figure 3, the drying device 8 wraps successively from top to bottom
Continuous drying tower 31, star-like drawing mechanism 32, cooling feed bin 33 are included, the continuous drying top of tower 31 is provided with hot N2Drying system
34, the hot N2Drying system 34 includes the first N2Filter 37, first circulation blower fan 38, the first N2Heater 39, described first
N2The entrance of filter 37 is connected with the continuous drying top of tower 31, the entrance of first circulation blower fan 38 and the first N2Cross
The outlet of filter 37 connection, the first N2The entrance of heater 39 connects with the first circulation blower fan 38 outlet, the first N2Add
The hot outlet of device 39 in the middle part of the connection side wall of drying tower 31 with connecting.Pass through hot N2The moisture content of wet slice surface is taken away, and is passed through
First N2Filter removes N2In moisture content, reuse the first N2Heater is to N2Concurrent heating is carried out, is realized to hot N2In drying system
N2Recycling.
As a preferred embodiment, the second hot N is additionally provided with the continuous drying tower 312Drying system 35, institute
State the 2nd N2Drying system 35 includes the first heat sink 40, the second heat sink 41, the N of second circulation blower fan 46 and the 2nd2Heating
Device 42, the entrance of the first heat sink 40 connect with the first circulation blower fan 38 outlet, and second heat sink 41 enters
Mouthful export and to be connected with first heat sink 40, the entrance of second circulation blower fan 46 exports with institute the second heat sink of art 41
It is connected, the 2nd N2The entrance of heater 42 is connected with the second circulation blower fan 46 outlet, the 2nd N2Heater 42 exports
It is connected with the continuous drying bottom of tower 31.Second hot N2Designed in drying system by reducing temperature twice, make N2Temperature be reduced to
Below dew point, N is isolated2In moisture content, then by heating make N2Temperature reach 140~160 DEG C, from continuous drying tower bottom
Into to nylon chips progress redrying.
As a preferred embodiment, second heat sink 41 is provided with condensation zone 47, the condensation zone 47
It is made up of a plurality of in the condensation passage 48 of bending, every section of condensation passage 48 forms by multistage condensation section 49, phase
Angle between adjacent two sections of condensation section 49 is 30~60 °.By designing condensation zone, make N after cooling2It is in condensation zone and each
The baffle plate of section condensation section fully contacts, N2In water stay in dew formed on baffle plate, so as to realize N2With the separation of moisture content.
As a preferred embodiment, the cooling feed bin 33 is provided with N2Cooling system 36, the N2Cooling system
36 include the 2nd N2Filter 43, cooling blower 44 and N2Cooler 45, the 2nd N2The entrance of filter 43 is expected with the cooling
The top of storehouse 33 is connected, the entrance of cooling blower 44 and the 2nd N2The outlet of filter 43 is connected, the N2The entrance of cooler 45
It is connected with the cooling blower 44 outlet, the N2Cooler 45 exports to be connected with cooling feed bin 33 bottom.By cold
N is but set on feed bin2Cooling system, the cooling to dry chip finished product is not only realized, and also achieved to dry chip again
Dry, further improve the quality of final finished.
As a preferred embodiment, the first N2One layer of moisture content sorbing material is provided with filter 37, is used
Carbon fibre composite uses needling process as skeleton, and in surface attachment activated carbon granule, the carbon fibre composite,
Its thickness in 1cm~5cm, pore radius control in below 0.5mm, wherein the size control of activated carbon granule 0.05~
0.1mm, it accounts for less than the 30% of carbon fibre composite gross mass, preferably 25%.
The present embodiment also provides a kind of production method using above-mentioned nylon chips production line, comprises the following steps：
Step 1：By liquid caprolactam, initiator, delustering agent, stabilization agent and antioxidant in static mixer fully
Mixing, mixing temperature are 90~150 DEG C, and incorporation time is controlled in 1~3h；
Step 2：By well mixed composition successively through evaporating reactor and tubular reactor, slow heating makes combination
The temperature of thing progressively increases to more than 250 DEG C, controls between 250~270 DEG C, wherein the temperature of evaporation reactor for 260~
270 DEG C, the temperature of tubular reactor is 250~260 DEG C, and the pressure of adjustment control evaporation reactor and tubular reactor is 2-
4bar, reaction time 3-5h；
Step 3：Pass through finished product reactor again, temperature control is at 230~250 DEG C, and 1~2bar of pressure, time control is 5
~7h, obtain nylon final product mix；
Step 4：Nylon final product mix is plastified through screw extruder and extruded, then is cut into nylon chips through pelleter；
Step 5：Nylon chips are extracted through extraction equipment again, are removed the low polymer in section, are made its low point
The content of sub- polymer is less than 0.03%, then processing is dried to wet section, obtains required nylon chips.
Preferred embodiment of the present utility model has shown and described in described above, as previously described, it should be understood that this practicality is new
Type is not limited to form disclosed herein, is not to be taken as the exclusion to other embodiment, and available for various other groups
Conjunction, modification and environment, and above-mentioned teaching or the technology of association area can be passed through in utility model contemplated scope described herein
Or knowledge is modified.And the change and change that those skilled in the art are carried out do not depart from spirit and scope of the present utility model, then
All should be in the protection domain of the appended claims for the utility model.
Claims (5)
1. a kind of nylon chips extraction equipment, it is characterised in that including head tank, extraction tower, extraction tower top EGR, extraction
Tower bottom EGR, pure hot water water supply installation and centrifugal separating device are taken, the head tank is arranged at the top of the extraction tower,
Extraction tower top EGR is arranged on the extraction tower upper area, extraction tower bottom EGR and described pure
Hot water water supply installation is arranged on the extraction tower bottom, and the centrifugal separating device charging aperture is connected with the extraction tower bottom,
The centrifugal separating device delivery port is connected with the water inlet of the pure hot water water supply installation, is set in the middle part of the extraction tower on inwall
There is the baffle plate tilted down, the baffle plate is located at below the EGR of the extraction tower top.
A kind of 2. nylon chips extraction equipment according to claim 1, it is characterised in that the extraction tower top circulation dress
Put including the first delivery pump, first filter and primary heater, the first conveying pump intake and the extraction tower top
Portion is connected, and the filter inlet is connected with the described first conveying pump discharge, the primary heater entrance and first mistake
Filter outlets are connected, and the primary heater outlet in the middle part of the extraction tower with being connected.
A kind of 3. nylon chips extraction equipment according to claim 2, it is characterised in that the extraction tower bottom circulation dress
Put including secondary heater, the secondary heater entrance is connected with the extraction tower close to bottom sides, second heating
Device exports to be connected with the extraction tower bottom.
A kind of 4. nylon chips extraction equipment according to claim 2, it is characterised in that the pure hot water water supply installation bag
Hopper, the second delivery pump, the second filter are included, the hopper water inlet is connected with the centrifugal separating device delivery port,
The hopper delivery port is connected with the second delivery pump water inlet, the second filter water inlet and the described second conveying
Pump out the mouth of a river to be connected, the second filter delivery port is connected with the extraction tower bottom.
5. a kind of nylon chips production line, including the extraction equipment as described in claim any one of 1-4, it is characterised in that from
Front to back also includes static mixer, evaporation reactor, tubular reactor, finished product reactor, screw extruder, pelletizing successively
Machine, drying device, the extraction equipment are arranged on the pellet device rear, and are located in front of the drying device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720605417.XU CN207012604U (en) | 2017-05-27 | 2017-05-27 | A kind of nylon chips extraction equipment and production line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720605417.XU CN207012604U (en) | 2017-05-27 | 2017-05-27 | A kind of nylon chips extraction equipment and production line |
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| Publication Number | Publication Date |
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| CN207012604U true CN207012604U (en) | 2018-02-16 |
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| CN201720605417.XU Expired - Fee Related CN207012604U (en) | 2017-05-27 | 2017-05-27 | A kind of nylon chips extraction equipment and production line |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107029447A (en) * | 2017-05-27 | 2017-08-11 | 江苏华洋尼龙有限公司 | A kind of nylon chips extraction equipment and production line |
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2017
- 2017-05-27 CN CN201720605417.XU patent/CN207012604U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107029447A (en) * | 2017-05-27 | 2017-08-11 | 江苏华洋尼龙有限公司 | A kind of nylon chips extraction equipment and production line |
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