CN108844354B - Drying device for nylon 6 slices - Google Patents
Drying device for nylon 6 slices Download PDFInfo
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- CN108844354B CN108844354B CN201810874923.8A CN201810874923A CN108844354B CN 108844354 B CN108844354 B CN 108844354B CN 201810874923 A CN201810874923 A CN 201810874923A CN 108844354 B CN108844354 B CN 108844354B
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- tank
- drying
- drying tank
- nylon
- material moving
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- 238000001035 drying Methods 0.000 title claims abstract description 217
- 229920002292 Nylon 6 Polymers 0.000 title claims abstract description 82
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 140
- 239000000463 material Substances 0.000 claims abstract description 71
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 66
- 238000001914 filtration Methods 0.000 claims abstract description 35
- 239000007789 gas Substances 0.000 claims abstract description 18
- 238000007599 discharging Methods 0.000 claims description 13
- 239000000428 dust Substances 0.000 claims description 12
- 229920005597 polymer membrane Polymers 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 229910001873 dinitrogen Inorganic materials 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 230000000630 rising effect Effects 0.000 description 4
- 238000009987 spinning Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000004566 building material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 238000009489 vacuum treatment Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/12—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft
- F26B17/14—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft the materials moving through a counter-current of gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/003—Supply-air or gas filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
- F26B21/04—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/08—Humidity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/14—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects using gases or vapours other than air or steam, e.g. inert gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/001—Handling, e.g. loading or unloading arrangements
- F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention discloses a nylon 6 slice drying device, which comprises: a drying tank; a feeding hopper connected with the top of the drying tank; a material moving tank connected with the top of the drying tank, wherein a fourth pipe orifice of the material moving tank is connected with a third pipe orifice of the drying tank, and is used for enabling slices of the drying tank to enter the material moving tank according to the vacuum state of the material moving tank; according to the vacuum state, the material transferring tank and the turning plate of the drying tank are communicated or isolated; the air inlet end of the nitrogen heater is connected with the nitrogen input end and the filtering outlet end of the filtering and drying assembly; the air outlet end is connected with a first pipe orifice of the drying tank and is used for introducing hot nitrogen into the drying tank; the air outlet end is also connected with a second pipe orifice of the drying tank and is used for continuously introducing hot nitrogen into the drying tank; the vortex fan is connected with the material moving tank and used for evacuating gas in the material moving tank; the filter inlet end of the filter drying component is also connected with the filter inlet end of the filter drying component; and a vacuum pump connected with the drying tank. The nylon 6 slice drying device has low cost, small volume and low water content value of the nylon 6 slice.
Description
Technical Field
The invention relates to the field of nylon 6 slice drying, in particular to a nylon 6 slice drying device.
Background
Nylon 6 slice is a thermoplastic plastic, which is widely used in the fields of automobiles, machinery, daily products, chemical building materials and the like, and can also be used as the basis of modified resin. At present, the water content of the spun fiber-grade nylon 6 slice is 300-600 PPm, but due to the reasons of transportation, storage and the like, when the nylon 6 slice is used by spinning manufacturers, the water content of the nylon 6 slice is more than 600PPm, so that the fiber strength is reduced, the spinning ends are broken during spinning, and the spinning does not meet the market requirements.
In the prior art, nylon 6 slices are continuously dried and dehydrated by using nitrogen, the dehydrated slices enter from the top of a drying tower and are in countercurrent contact with hot nitrogen in the drying tower, the slices slowly flow downwards at a certain speed, and the slices are discharged from the bottom of the drying tower after being dried. Wet nitrogen is pumped out from the top of the tower, one part of the wet nitrogen enters the middle part of the drying tower after being heated by a heater, the other part of the wet nitrogen enters a desuperheater for cooling, then enters the bottom of the spraying tower, and is in countercurrent contact with low-temperature cooling water sprayed from the top of the spraying tower, so that moisture and entrained dust in the nitrogen are separated, and then the wet nitrogen enters the tower from the lower part of the drying tower for reuse after being heated by the heater. However, in the drying process, since the drying tower is not subjected to vacuum treatment, the moisture content of the nylon 6 chips is difficult to reach 300PPm or less, and the nylon 6 chips in the prior art are all continuous drying modes, so that the drying time is long and the device is huge, and the drying cost of the nylon 6 chips is increased. Therefore, designing a drying device for nylon 6 slices, which can reduce the cost, has a small volume and has a water content of less than 300PPm after drying, is one of the problems to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a nylon 6 slice drying device which is low in cost and small in size, and the moisture value of the dried nylon 6 slices is lower than 300PPm.
In order to achieve the above object, the technical scheme of the present invention is as follows:
a nylon 6 chip drying device, comprising:
a drying tank, comprising: the first pipe orifice is arranged in the middle of the drying tank, the second pipe orifice is arranged at the bottom of the drying tank, and the third pipe orifice is arranged at the bottom of the drying tank;
a feeding hopper connected to the top of the drying tank for feeding nylon 6 chips into the drying tank;
the bottom of the material transferring tank is connected with the top of the drying tank;
the material moving tank comprises: the fourth pipe orifice and the turning plate; the fourth pipe orifice is connected with the third pipe orifice and is used for enabling nylon 6 slices of the drying tank to enter the material moving tank according to the vacuum state of the material moving tank; the turning plate is arranged at the bottom of the material moving tank and is used for enabling the bottom of the material moving tank to be communicated with or isolated from the top of the drying tank according to the vacuum state of the material moving tank;
a filter drying assembly comprising a filter inlet end and a filter outlet end;
the nitrogen heater comprises an air inlet end and an air outlet end; the air inlet end is connected with the nitrogen input end and the filtering outlet end of the filtering and drying assembly; the air outlet end is connected with the first pipe orifice and is used for introducing hot nitrogen into the drying tank; the air outlet end is also connected with the second pipe orifice and is used for continuously introducing hot nitrogen into the drying tank;
one end of the vortex fan is connected with the material moving tank and is used for evacuating gas in the material moving tank; the other end is connected with the filtering inlet end of the filtering and drying component;
and the vacuum pump is connected with the drying tank and is used for pumping the gas in the drying tank.
Further, the feeding hopper is further provided with a feeding valve, and the feeding valve is arranged between the feeding hopper and the drying tank and used for controlling the feeding hopper to be communicated with or isolated from the drying tank.
Further, when the vortex fan works, the material moving tank is in a vacuum state, the turning plate is closed, and nylon 6 slices in the drying tank enter the material moving tank;
when the vortex fan stops, the material moving tank is in a non-vacuum state, the turning plate is opened, nylon 6 slices in the material moving tank enter the drying tank, and the nitrogen heater continuously introduces hot nitrogen into the drying tank through the second pipe orifice.
Further, the drying tank further includes: the drying tank comprises a drying tank shell, an air distribution cone arranged in the drying tank shell and a drying tank discharging pipe arranged in the drying tank shell;
the drying tank shell is connected with the first pipe orifice;
the air distribution cone is provided with a vent hole, and the aperture of the vent hole is smaller than the particle size of the nylon 6 slice;
the discharging pipe of the drying tank is connected with the bottom of the gas distribution cone; the drying tank discharging pipe is also connected with the second pipe orifice and the third pipe orifice.
Further, the drying tank further comprises a drying tank discharge valve arranged on the drying tank discharge pipe and used for enabling the drying tank to be communicated with or isolated from the transportation tank.
Further, the material moving tank further comprises a material moving pipe, one end of the material moving pipe is connected with the third pipe orifice, and the other end of the material moving pipe is connected with the fourth pipe orifice.
Further, the filtering and drying assembly sequentially comprises a Roots pump, a dust filter and a polymer membrane filter according to the flowing direction of nitrogen.
Further, the filtration inlet end of the filtration and drying assembly is also connected to the top of the drying tank.
Further, the transport tank is arranged below the drying tank;
the transportation tank includes: a transport tank feed port arranged at the top of the transport tank and a transport tank discharge port arranged at the bottom of the transport tank; the conveying tank feed inlet is connected with the drying tank discharge outlet through a pipeline and is used for receiving the nylon 6 slices dried in the drying tank.
Further, the transportation tank further comprises a fifth pipe orifice arranged at the bottom of the transportation tank, and the fifth pipe orifice is connected with the nitrogen input end and/or the filtering outlet end of the filtering and drying assembly.
Compared with the prior art, the invention has the following technical effects:
according to the nylon 6 slice drying device, when the vortex fan works, gas of the material moving tank is extracted, so that nylon 6 slices in the drying tank enter the material moving tank, and when the vortex fan stops, the nylon 6 slices in the material moving tank drop into the drying tank and are in countercurrent contact with hot nitrogen rising in the drying tank, and the hot nitrogen takes away dust and moisture of the nylon 6 slices and enters the material moving tank. And (3) opening the vortex fan again, extracting nitrogen mixed with dust and moisture in the material moving tank, and inputting the nitrogen into the filtering and drying assembly for filtering and dewatering. The vortex fan is intermittently switched on and off for many times, so that nylon 6 slices in the drying tank can be repeatedly dried for many times, a single mode of countercurrent contact with rising hot nitrogen in the prior art is replaced, the drying can be repeated for many times to reduce the water content of the nylon 6 slices, the volume of the drying tank can be reduced, and the cost is reduced.
For a better understanding and implementation, the present invention is described in detail below with reference to the drawings.
Drawings
Fig. 1 is a schematic view of a nylon 6 chip drying apparatus of the present invention.
[ reference numerals ]
10 drying tank 102 gas distribution cone 103 drying tank discharging pipe
105 drying pot discharge valve 106 material moving pipe
20 throw hopper 201 throw material valve
30 transport tank 301 transport tank feed inlet 302 transport tank discharge outlet
303 fifth nozzle
Fourth pipe orifice of 40-moving tank 401 turning plate 402
50 Nitrogen Heater 501 first nozzle 502 third nozzle
503 second nozzle 504 inlet end 505 outlet end
60 vortex fan
70 vacuum pump 701 vacuum pump inlet 702 vacuum pump outlet
80 filter drying assembly 801 Roots pump 802 dust filter
803 Polymer Membrane Filter 804 filtration Inlet end 805 filtration Outlet end
90 nitrogen input 900 air-vent valve 901 first control valve
902 second control valve 903 third control valve 904 fourth control valve
905 fifth control valve 906 sixth control valve 907 seventh control valve
908 eighth control valve 909 ninth control valve 911 first shut-off valve
912 second cut-off valve 913 third cut-off valve
Detailed Description
For a fuller understanding of the objects, features, and effects of the present invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings.
In the continuous drying treatment process of nylon 6 slices, the dehydrated nylon 6 slices enter from the top of a drying tower and are in countercurrent contact with hot nitrogen in the drying tower, the nylon 6 slices slowly flow downwards at a certain speed, and are discharged from the bottom of the drying tower after being dried. In the prior art, in order to enable the nylon 6 chips to be fully in countercurrent contact with hot nitrogen, the drying tower needs to have a certain height, so that the nylon 6 chips are ensured to have a sufficient contact distance, and the whole drying process is completed. However, this method of drying nylon 6 chips requires not only a large-sized drying tower but also unsatisfactory drying effects, and the moisture content of each nylon 6 chip cannot be ensured to be 300PPm or less.
As shown in fig. 1, in order to solve the above problems, the present invention provides a drying apparatus for nylon 6 chips, comprising:
a drying tank 10, comprising: a first nozzle 501 arranged in the middle of the drying tank 10, a second nozzle 503 arranged at the bottom of the drying tank 10, and a third nozzle 502 arranged at the bottom of the drying tank 10;
a charging hopper 20 connected to the top of the drying tank 10 for charging nylon 6 chips into the drying tank 10;
a transfer pot 40, the bottom of which is connected with the top of the drying pot 10;
the material moving tank 40 includes: a fourth port 402 and a flap 401; the fourth pipe orifice 402 is connected to the third pipe orifice 502, and is configured to enable the nylon 6 slice of the drying tank 10 to enter the material moving tank 40 according to the vacuum state of the material moving tank 40; the turning plate 401 is disposed at the bottom of the material moving tank 40, and is used for communicating or isolating the bottom of the material moving tank 40 with the top of the drying tank 10 according to the vacuum state of the material moving tank 40;
a filter-drying assembly 80 comprising a filter inlet end 804 and a filter outlet end 805;
a nitrogen heater 50 comprising an inlet end 504 and an outlet end 505; the inlet end 504 is connected to the nitrogen inlet end 90 and the filter outlet end 805 of the filter and dryer assembly 80; the air outlet end 505 is connected with the first pipe orifice 501 and is used for introducing hot nitrogen into the drying tank 10; the air outlet end 505 is further connected to the second pipe orifice 503, so as to continuously introduce hot nitrogen into the drying tank 10;
a swirl fan 60 having one end connected to the material moving tank 40 for evacuating the gas in the material moving tank 40; the other end is connected with the filtering inlet end of the filtering and drying assembly 80;
and a vacuum pump 70 connected to the drying tank 10 for pumping the gas in the drying tank 10.
Specifically, the worker adds nylon 6 chips to the drying tank 10 through the hopper 20, adjusts the pressure regulating valve 900 and the first shut-off valve 911 at the nitrogen input end, and adjusts the pressure of the nitrogen to 0.1MPa. The first control valve 901 at the nitrogen input end is opened, the nitrogen heater 50 heats the cold nitrogen gas inputted from the nitrogen input end 90 to the hot nitrogen gas of 110 c, and automatically controls the temperature. And opening a second control valve 902 positioned at the air outlet end 505 of the nitrogen heater 50, wherein hot nitrogen of the nitrogen heater 50 enters the drying tank 10 through the first pipe orifice 501, heats the slices in the drying tank 10 and discharges air in the drying tank 10 out of the drying tank through the feeding hopper, so that the whole feeding process is completed.
After the end of the feeding, the feeding valve 201 is closed, the second control valve 902 is opened, the first control valve 901, the third control valve 903 connected to the material moving tank 40, the fourth control valve 904 connected to the vortex fan 60, the fifth control valve 905 positioned at the outlet end 505 of the nitrogen heater 50, the sixth control valve 906 connected to the drying tank 10, the seventh control valve 907 positioned at the filtering output end of the filtering and drying unit, and the second stop valve 912 are opened. Through intermittent switch vortex fan 60, when vortex fan 60 during operation, vortex fan 60 is right gas in the material moving tank 40 is extracted, turn over board 401 under the effect of vortex fan 60 is closed, makes the bottom of material moving tank 40 with the top of drying tank 10 is isolated, simultaneously, the nylon 6 section of drying tank 10 is under the negative pressure effect, by third mouth of pipe 502 suction, through material moving pipe 106 with fourth mouth of pipe 402 suction arrives in the material moving tank 40. When the vortex fan 60 stops, the material moving tank is in a non-vacuum state, the turning plate 401 is opened under the action of gravity, nylon 6 slices in the material moving tank drop into the drying tank 10 under the action of gravity, and meanwhile, the air outlet end 505 of the nitrogen heater 50 continuously inputs hot nitrogen into the drying tank 10 through the second pipe orifice 503. The falling nylon 6 chips are counter-currently contacted with rising hot nitrogen gas which carries away the moisture and dust from the nylon 6 chips and into the transfer pot 40 or the filter drying assembly 80. The vortex fan 60 is turned on again, the vortex fan 60 extracts the gas mixed with moisture and dust in the material moving tank 40, and inputs the gas into the filtering and drying assembly 80 for filtering and drying, and the filtered and dried gas reenters the nitrogen heater through the filtering outlet end for heating. The vortex fan 60 is intermittently switched on and off for a plurality of times, so that nylon 6 slices in the drying tank 10 can be repeatedly dried for a plurality of times, a mode that the nylon 6 slices are singly contacted with rising hot nitrogen in countercurrent in the prior art is replaced, the drying can be repeated for a plurality of times to reduce the moisture value of the nylon 6 slices, the volume of the drying tank can be reduced, and the cost is reduced. When the nylon 6 slice is repeatedly dried for a plurality of times, the nylon 6 slice is turned up and down, so that the contact area between the nylon 6 slice and hot nitrogen is increased. Therefore, the nylon 6 chips in the drying tank can be dried only by 1 hour in the drying step.
The first control valve 901, the second control valve 902, the third control valve 903, the fourth control valve 904, the fifth control valve 905, the sixth control valve 906 and the seventh control valve 907 are closed, the first control valve 908 is opened, the vacuum pump 70 is started, the vacuum pump 70 pumps nitrogen and moisture in the drying tank 10, the vacuum degree in the drying tank 10 is made to be less than 200Pa, and the nylon 6 chips in the drying tank 10 are further dried. The vacuum pump 70 further includes a vacuum pump inlet 701 and a vacuum pump outlet 702, and nitrogen and moisture in the drying tank 10 are introduced through the vacuum pump inlet 701 and discharged from the vacuum pump outlet to the outside environment.
Further, the feeding hopper 20 is further provided with a feeding valve 201, and the feeding valve 201 is disposed between the feeding hopper 20 and the drying tank 10, and is used for controlling the feeding hopper 20 to be communicated with or isolated from the drying tank 10.
Further, when the vortex fan 60 works, the material moving tank 40 is in a vacuum state, the turning plate 401 is closed, and nylon 6 slices in the drying tank 10 enter the material moving tank 40;
when the vortex fan 60 stops, the material moving tank 40 is in a non-vacuum state, the turning plate 401 is opened, nylon 6 slices in the material moving tank 40 enter the drying tank 10, and the nitrogen heater 50 continuously introduces hot nitrogen into the drying tank 10 through the second pipe orifice 503.
Further, the drying tank 10 further includes: a drying tank shell, an air distribution cone 102 arranged in the drying tank 10 shell and a drying tank discharging pipe 103 arranged in the drying tank shell;
the drying tank housing is connected with the first pipe orifice 501;
the air distribution cone 102 is provided with a vent hole, and the aperture of the vent hole is smaller than the particle size of the nylon 6 slice;
the drying tank discharging pipe 103 is connected with the bottom of the gas distribution cone 102; the dryer discharge pipe 103 is also connected to the second nozzle 503 and the third nozzle 502.
Specifically, the hot nitrogen of the nitrogen heater 50 enters the drying tank 10 through the first nozzle 501 and transfers heat to the nylon 6 chips through the vent holes of the gas distribution cone 102. The nylon 6 chips slide down the inclined surface of the gas distribution cone 102 into the dryer discharge pipe 103 for entry into the transfer pot 40 via the third nozzle 502. The hot nitrogen gas may also enter the drying tank 10 from the bottom of the drying tank via the second nozzle 503 to increase the contact distance with the hot nitrogen gas when the nylon 6 chips fall.
Further, the drying tank 10 further comprises a drying tank discharge valve 105, and the drying tank discharge valve 105 is disposed on the drying tank discharge pipe 103 for communicating or isolating the drying tank 10 with the transportation tank 30.
Further, the material moving tank 40 further includes a material moving pipe 106, one end of the material moving pipe 106 is connected to the third pipe orifice 502, and the other end is connected to the fourth pipe orifice 402.
Further, the filter-drying unit 80 includes a roots pump 801, a dust filter 802, and a polymer membrane filter 803 in this order in the flow direction of nitrogen gas. The Roots pump 801 pressurizes the nitrogen gas at the filtration inlet port 804 to 4bar, and allows the nitrogen gas to enter the dust filter 802 to filter dust, enter the polymer membrane filter 803 to dehydrate, and then enter the nitrogen heater 40 through the filtration outlet port 805 for recycling. The polymer membrane filter can block water to obtain low dew point (-50 ℃), so as to obtain high-purity nitrogen, and the water content of the nylon 6 chip is less than 300PPm.
Further, the filter inlet end 804 of the filter and dryer assembly 80 is also connected to the top of the dryer tank 10 so that hot nitrogen with moisture and dust directly enters the filter and dryer assembly 80.
Further, the transport tank 30 is disposed below the drying tank 10;
the transportation tank 30 includes: a transportation tank inlet 301 provided at the top of the transportation tank 30, and a transportation tank outlet 302 provided at the bottom of the transportation tank 30; the feeding port 301 of the transportation tank is connected with the discharging port of the drying tank 10 through a pipeline, and is used for receiving the dried nylon 6 slices in the drying tank 10. To receive nylon 6 chips of the drying tank 10, the first control valve 901, the sixth control valve 906, the seventh control valve 907, the ninth control valve 909 are opened, and the eighth control valve 908 is closed. The Roots pump 801 is started to pressurize, nitrogen enters the drying tank 10 through the first pipe orifice 501, cools the nylon 6 chips and enters the filter drying assembly for recycling.
Further, the transportation tank 30 further comprises a fifth nozzle 303 provided at the bottom of the transportation tank 30, and the fifth nozzle 303 is connected to the nitrogen inlet and/or the filtration inlet of the filtration and drying assembly 80. And opening the drying tank discharging valve 10, enabling nylon 6 slices in the drying tank 10 to enter the transportation tank 30 for discharging, opening the third stop valve 913, and introducing nitrogen through the fifth pipe orifice to prevent air from entering the transportation tank 30. At the end of discharging, the first control valve 901, the sixth control valve 906, the seventh control valve 907, the ninth control valve 909 and the Roots pump 801 are closed, the feed inlet 301 of the transportation tank is closed, the transportation tank 30 is isolated from the air in the external environment, and the discharge outlet 302 of the transportation tank is opened when the nylon 6 chips need to be discharged.
It should be noted that, the above mentioned valve switches may be controlled automatically by a control system, or manually by a person.
The present invention is not limited to the above-described embodiments, but, if various modifications or variations of the present invention are not departing from the spirit and scope of the present invention, the present invention is intended to include such modifications and variations as fall within the scope of the claims and the equivalents thereof.
Claims (8)
1. A nylon 6 chip drying device, comprising:
a drying tank, comprising: the first pipe orifice is arranged in the middle of the drying tank, the second pipe orifice is arranged at the bottom of the drying tank, and the third pipe orifice is arranged at the bottom of the drying tank;
a feeding hopper connected to the top of the drying tank for feeding nylon 6 chips into the drying tank;
the bottom of the material transferring tank is connected with the top of the drying tank;
the material moving tank comprises: the fourth pipe orifice and the turning plate; the fourth pipe orifice is connected with the third pipe orifice and is used for enabling nylon 6 slices of the drying tank to enter the material moving tank according to the vacuum state of the material moving tank; the turning plate is arranged at the bottom of the material moving tank and is used for enabling the bottom of the material moving tank to be communicated with or isolated from the top of the drying tank according to the vacuum state of the material moving tank;
a filter drying assembly comprising a filter inlet end and a filter outlet end;
the nitrogen heater comprises an air inlet end and an air outlet end; the air inlet end is connected with the nitrogen input end and the filtering outlet end of the filtering and drying assembly; the air outlet end is connected with the first pipe orifice and is used for introducing hot nitrogen into the drying tank; the air outlet end is also connected with the second pipe orifice and is used for continuously introducing hot nitrogen into the drying tank;
one end of the vortex fan is connected with the material moving tank and is used for evacuating gas in the material moving tank; the other end is connected with the filtering inlet end of the filtering and drying component;
a vacuum pump connected to the drying tank for pumping gas in the drying tank;
the material moving tank further comprises a material moving pipe, one end of the material moving pipe is connected with the third pipe orifice, and the other end of the material moving pipe is connected with the fourth pipe orifice;
when the vortex fan works, the material moving tank is in a vacuum state, the turning plate is closed, and nylon 6 slices in the drying tank enter the material moving tank;
when the vortex fan is stopped, the material moving tank is in a non-vacuum state, the turning plate is opened, nylon 6 slices in the material moving tank enter the drying tank, and the nitrogen heater continuously introduces hot nitrogen into the drying tank through the second pipe orifice;
the vortex fan is intermittently switched on and off for a plurality of times, so that the nylon 6 slice in the drying tank can be repeatedly dried for a plurality of times.
2. The nylon 6 chip drying device according to claim 1, wherein:
the feeding hopper is further provided with a feeding valve, and the feeding valve is arranged between the feeding hopper and the drying tank and used for controlling the feeding hopper to be communicated with or isolated from the drying tank.
3. The nylon 6 chip drying device according to claim 1, wherein:
the drying tank further includes: the drying tank comprises a drying tank shell, an air distribution cone arranged in the drying tank shell and a drying tank discharging pipe arranged in the drying tank shell;
the drying tank shell is connected with the first pipe orifice;
the air distribution cone is provided with a vent hole, and the aperture of the vent hole is smaller than the particle size of the nylon 6 slice;
the discharging pipe of the drying tank is connected with the bottom of the gas distribution cone; the drying tank discharging pipe is also connected with the second pipe orifice and the third pipe orifice.
4. A nylon 6 chip drying apparatus as defined in claim 3, wherein:
the drying tank further comprises a drying tank discharge valve, and the drying tank discharge valve is arranged on the drying tank discharge pipe and used for enabling the drying tank to be communicated with or isolated from the transportation tank.
5. The nylon 6 chip drying device according to claim 4, wherein:
the filtering and drying assembly sequentially comprises a Roots pump, a dust filter and a polymer membrane filter according to the flowing direction of nitrogen.
6. The nylon 6 chip drying apparatus according to claim 1 or 5, wherein:
the filtration inlet end of the filtration drying assembly is also connected to the top of the drying tank.
7. The nylon 6 chip drying device according to claim 5, wherein:
the transport tank is arranged below the drying tank;
the transportation tank includes: a transport tank feed port arranged at the top of the transport tank and a transport tank discharge port arranged at the bottom of the transport tank; the conveying tank feed inlet is connected with the drying tank discharge outlet through a pipeline and is used for receiving the nylon 6 slices dried in the drying tank.
8. The nylon 6 chip drying apparatus of claim 7, wherein:
the transport tank further comprises a fifth pipe orifice arranged at the bottom of the transport tank, and the fifth pipe orifice is connected with the nitrogen input end and/or the filtering outlet end of the filtering and drying assembly.
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| JP6667884B1 (en) * | 2019-07-17 | 2020-03-18 | 株式会社松井製作所 | Drying device for granular material and method for drying granular material |
| IT202200014653A1 (en) * | 2022-07-12 | 2024-01-12 | Pegaso Ind S P A | Plant and process for drying polymer granular material |
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Address after: 529100 Xinhui Road, Xinhui District, Xinhui District, Guangdong, Jiangmen Patentee after: Guangdong Hengshen Meida New Materials Co.,Ltd. Country or region after: China Patentee after: CHANGDE MEIHUA NYLON Co.,Ltd. Address before: 529100 Xinhui Road, Xinhui District, Xinhui District, Guangdong, Jiangmen Patentee before: GUANGDONG XINHUI MEIDA NYLON Co.,Ltd. Country or region before: China Patentee before: CHANGDE MEIHUA NYLON Co.,Ltd. |