CN104817692B - The pressure/vacuum type drum dried of polyamide section, reaction and method for crystallising - Google Patents
The pressure/vacuum type drum dried of polyamide section, reaction and method for crystallising Download PDFInfo
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- CN104817692B CN104817692B CN201510165061.8A CN201510165061A CN104817692B CN 104817692 B CN104817692 B CN 104817692B CN 201510165061 A CN201510165061 A CN 201510165061A CN 104817692 B CN104817692 B CN 104817692B
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Abstract
The present invention relates to a kind of pressure/vacuum type drum dried of polyamide section, reaction and method for crystallising, this is comprised the following steps：(1) vacuumize under normal temperature, and the polyamide that need to be dry is cut into slices in suction rotary drum dryer；(2) being filled with compressed nitrogen under normal temperature makes rotary drum dryer pressure rise；(3) conduction oil indirectly heat rotary drum dryer is input into, under constant temperature, constant-pressure conditions, then makes polyamide section activation, reaction and crystallize；(4) the pressure of rotary drum dryer is down to normal pressure after terminating, and vacuumizes；The indirect cooler drum drying machine of input conduction oil, reduces the temperature of polyamide section；(5) polyamide is cut into slices through mixing silo discharge to blender；(6) low temperature nitrogen is intensified, after cooling, the material of blender is delivered in Cyclone bag dust collector by air-flow, the nitrogen after respectively obtaining dry polyamide section and filtering；Dry polyamide section is discharged through discharge valve；Nitrogen circulation after cooling is utilized.Safety of the present invention, flow process are short, simple to operate.
Description
Technical field
The present invention relates to the technical field of the novel dried and safe transport of polyamide section, more particularly to polyamide section
Pressure/vacuum type drum dried, reaction and method for crystallising.
Background technology
Generally, contain 0.2% ~ 0.5% moisture in reacted polyamide section, moisture makes section, in melting, water occur
Solution, and moisture vaporization forms bubble and make spinning break or produce lousiness, it is therefore desirable to moisture is reduced to 0.001% ~
In the range of 0.005%.While by drying the degree of crystallinity for improving section, softening point and bonding point, so as to ensure quality.
Need section is carried out in sealing container vacuumizing to reach above-mentioned drying effect, nitrogen filled protection, rise temperature rise
Pressure, constant temperature and pressure, decrease temperature and pressure etc. are operated.And existing method needs to realize in multiple devices, can not especially solve one
While realizing vacuum, operating process with pressure in platform equipment.
Content of the invention
The technical problem to be solved is to provide the pressure that a kind of flow process shortens, polyamide simple to operate is cut into slices
Power/vacuum type drum dried, reaction and method for crystallising.
For solving the above problems, the pressure/vacuum type drum dried of polyamide section of the present invention, reaction and crystallization
Method, comprises the following steps：
(1), under normal temperature, the vacuum in pressure/vacuum type drum dried, reaction and the crystal system of polyamide section is opened
Pump, vacuumizes to rotary drum dryer so as to vacuum to -0.1MPa；Then the rotary drum is opened under the vacuum condition
The entry/exit material mouth of drying machine, by described for the polyamide that need to be dry section suction rotary drum dryer, closes the entry/exit material mouth；
(2) under normal temperature condition, compressed nitrogen is filled with by the nitrogen inlet of the rotary drum dryer, makes the drum dried
The pressure rise of machine is to 0.2MPa；
(3) the conduction oil in heat-conducting oil heating system is defeated by heat conduction oil-in of the pipeline I through the rotary drum dryer
Enter, rotary drum dryer described in indirectly heat, make the temperature of polyamide section be increased to 260 DEG C, the rotary drum dryer
Pressure rise is to 2.6MPa；Then, under conditions of 260 DEG C of constant temperature, constant voltage 2.6MPa, the rotary drum dryer stablizes 1 ~ 2h to be made
Polyamide section activation, reaction and crystallization；While obtaining nitrogen and steam gas；
The nitrogen and steam gas enter filter by pipeline IV, enter buffering by the filter after being filtered
Tank, in the surge tank through pressure controller adjust pressure to during 0.4MPa enter condenser condensation, respectively obtain nitrogen and
Lime set；The nitrogen is discharged by vavuum pump, and the lime set is expelled directly out by drainpipe；
(4), after terminating, under conditions of 260 DEG C of constant temperature, the pressure of the rotary drum dryer is down to normal pressure；Then
Under conditions of 260 DEG C of constant temperature, constant voltage 2.6MPa, vavuum pump is opened, -0.1MPa is evacuated to the rotary drum dryer, and
Maintain 3 ~ 4h；Finally, under vacuum, by the conduction oil in heat conduction oil cooling system by pipeline I through the drum dried
The heat conduction oil-in input of machine, cools down the rotary drum dryer indirectly, so that the temperature of polyamide section is dropped to by 260 DEG C
Less than 100 DEG C；
(5), below 100 DEG C and under condition of normal pressure, the polyamide section is by the entry/exit material of the rotary drum dryer
Mouth discharging enters mixing silo, expects blender side by side；
(6) low temperature nitrogen, will by air-flow by low temperature nitrogen intake pipeline successively after air-introduced machine supercharging, cooler cooling
The material of the blender is delivered in Cyclone bag dust collector, the nitrogen after respectively obtaining dry polyamide section and filtering
Gas；The polyamide section of the drying is discharged through discharge valve；Nitrogen circulation after the cooling is utilized.
(1) the pressure/vacuum type drum dried of middle polyamide section, reaction and crystal system include that rotary drum is done to the step
Dry machine, filter, condenser, mixing silo, Cyclone bag dust collector；The top of the rotary drum dryer is provided with band automatic switch
Entry/exit material mouth, its axle is provided with nitrogen inlet, and its shaft end is connected with the filter by pipeline IV, and its chuck is provided with
Heat conduction oil-in, the heat conduction oil-in are connected with conduction oil heating system or cooling system by pipeline I respectively；The entry/exit
Material mouth be arranged right below the mixing silo, the bottom of the mixing silo is connected with blender；The Cyclone bag dust collector
Discharging opening is provided with discharge valve, and its top side is provided with purging nitrogen inlet, and its top opposite side is provided with exhaust outlet, its bottom side
It is provided with import；The import is connected with the material outlet of the blender by pipeline II；The gas access of the blender leads to
Cooled device, air-introduced machine are connected with low temperature nitrogen intake pipeline successively to cross pipeline III；The exhaust outlet respectively with the pipeline III, institute
State low temperature nitrogen intake pipeline to be connected；The side of the filter is provided with compressed nitrogen entrance, and its top is connected with surge tank, and this delays
The outlet for rushing tank is connected with the top of the condenser by pipeline V；The exhaust outlet of the condenser is connected with vavuum pump, one
Side is connected with recirculated water return pipe I, recirculated water upper hose I respectively, and its bottom is provided with drainpipe；The vavuum pump is connected with circulation respectively
Water return pipe II, recirculated water upper hose II；The pipeline V is provided with valve, and the valve is by controlling cable and the surge tank
Pressure controller be connected.
The shaft end seal of the rotary drum dryer is using packing seal and the combined sealing structure of shaft end of mechanical seal two-stage.
The pattern of the condenser and the cooler be shell-and-tube, board-like, finned in any one.
The pattern of the vavuum pump is the pattern of water ring vacuum pump+Roots vaccum pump.
The present invention has advantages below compared with prior art：
1st, flow process shortens, simple to operate.
The multi-functional realization in an equipment rotary drum dryer of multiple devices realization will be needed in the present invention, shorten
Technological process, simple to operate.
2nd, the shaft end seal of rotary drum dryer of the present invention is using packing seal and the combined shaft end seal of mechanical seal two-stage
Structure, the sealing structure dependable performance, simple and reasonable, it is to avoid the possibility of section oxidation scission, improve product
Quality, while meet the technical requirements of internal pressure 2.6MPa and vacuum.
3rd, safety and sanitation, nitrogen consumption are little.
The present invention prevents dry material from leaking using hermetically sealed design, good sealing effect, safety and sanitation, process of air delivery
In, nitrogen reduces the consumption of nitrogen by the way of recycling.Meanwhile, control surge tank to go out by pressure controller
Mouth pressure, can be effectively isolated vacuum and pressure system, prevent the entrance oxidation material of air, so that whole system more safely may be used
Lean on.
Description of the drawings
Specific embodiment to the present invention is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation of the present invention.
In figure：1- rotary drum dryer 2- filter 3- surge tank 4- condenser 5- vavuum pump 6- mixing silo
7- blender 8- Cyclone bag dust collector 9- discharge valve 10- air blast 11- cooler 12- entry/exit material mouth 13-
Nitrogen inlet 14- heat conduction oil-in 15- purges nitrogen inlet 16- exhaust outlet 17- import 18- compressed nitrogen entrance
On I 20- recirculated water upper hose of 19- recirculated water return pipe, I 21- drainpipe 22- recirculated water return pipe, II 23- recirculated water
II 24- valve of water pipe.
Specific embodiment
As shown in figure 1, the pressure/vacuum type drum dried of polyamide section, reaction and method for crystallising, including following step
Suddenly：
(1), under normal temperature, the vavuum pump in pressure/vacuum type drum dried, reaction and the crystal system of polyamide section is opened
5, rotary drum dryer 1 is vacuumized so as to vacuum to -0.1MPa；Then drum dried is opened under the vacuum condition
The entry/exit material mouth 12 of machine 1, the polyamide that need to be dry is cut into slices in suction rotary drum dryer 1, closes entry/exit material mouth 12.
Wherein：
The pressure/vacuum type drum dried of polyamide section, reaction and crystal system include rotary drum dryer 1, filter
2nd, condenser 4, mixing silo 6, Cyclone bag dust collector 8.The top of rotary drum dryer 1 is provided with the entry/exit material with automatic switch
Mouth 12, its axle is provided with nitrogen inlet 13, and its shaft end is connected with filter 2 by pipeline IV, and its chuck is provided with conduction oil and enters
Mouth 14, the heat conduction oil-in 14 is connected with conduction oil heating system or cooling system by pipeline I respectively；Entry/exit material mouth 12
Mixing silo 6 is arranged right below, the bottom of the mixing silo 6 is connected with blender 7；The discharging opening of Cyclone bag dust collector 8 is provided with
Discharge valve 9, its top side are provided with purging nitrogen inlet 15, and its top opposite side is provided with exhaust outlet 16, and its bottom side is provided with
Import 17；Import 17 is connected with the material outlet of blender 7 by pipeline II；The gas access of blender 7 by pipeline III according to
Secondary cooled device 11, air-introduced machine 10 are connected with low temperature nitrogen intake pipeline；Exhaust outlet 16 respectively with pipeline III, low temperature nitrogen input pipe
Line is connected；The side of filter 2 is provided with compressed nitrogen entrance 18, and its top is connected with surge tank 3, and the outlet of the surge tank 3 passes through
Pipeline V is connected with the top of condenser 4；The exhaust outlet of condenser 4 is connected with vavuum pump 5, and its side is connected with recirculated water backwater respectively
Pipe I 19, recirculated water upper hose I 20, its bottom is provided with drainpipe 21；Vavuum pump 5 is connected with recirculated water return pipe II 22, circulation respectively
Water pipe waterborne II 23；Pipeline V is provided with valve 24, and the valve 24 is by control cable and the pressure controller phase of surge tank 3
Even.
The shaft end seal of rotary drum dryer 1 is using packing seal and the combined sealing structure of shaft end of mechanical seal two-stage.
The pattern of condenser 4 and cooler 11 be shell-and-tube, board-like, finned in any one.
The pattern of vavuum pump 5 is the pattern of water ring vacuum pump+Roots vaccum pump.
(2), under normal temperature condition, compressed nitrogen is filled with by the nitrogen inlet 13 of rotary drum dryer 1, makes rotary drum dryer 1
Pressure rise is to 0.2MPa.
(3) the conduction oil in heat-conducting oil heating system is input into by heat conduction oil-in 14 of the pipeline I through rotary drum dryer 1,
Indirectly heat rotary drum dryer 1, make the temperature of polyamide section be increased to 260 DEG C, the pressure rise of rotary drum dryer 1 extremely
2.6MPa；Then, under conditions of 260 DEG C of constant temperature, constant voltage 2.6MPa, rotary drum dryer 1 stablizes 1 ~ 2h makes polyamide section live
Change, react and crystallize.While obtaining nitrogen and steam gas.
Nitrogen and steam gas enter filter 2 by pipeline IV, are filtered out after fine dust particles by filter 2
Surge tank 3 is entered, and pressure is adjusted through pressure controller in surge tank 3 and is condensed to entrance condenser 4 during 0.4MPa, respectively obtains
Nitrogen and lime set；Nitrogen is discharged by vavuum pump 5, and lime set is expelled directly out by drainpipe 21.
(4), after terminating, under conditions of 260 DEG C of constant temperature, the pressure of rotary drum dryer 1 is down to normal pressure；Then in perseverance
260 DEG C of temperature, under conditions of constant voltage 2.6MPa, vavuum pump 5 is opened, be evacuated to -0.1MPa to rotary drum dryer 1, and maintain 3 ~
4h；Finally, under vacuum, the conduction oil in heat conduction oil cooling system is passed through conduction oil of the pipeline I through rotary drum dryer 1
Entrance 14 is input into, indirect cooler drum drying machine 1, makes the temperature of polyamide section drop to less than 100 DEG C by 260 DEG C.
(5), below 100 DEG C and under condition of normal pressure, polyamide section is entered by 12 discharging of entry/exit material mouth of rotary drum dryer 1
Enter mixing silo 6, expect blender 7 side by side；
(6) after low temperature nitrogen is pressurized through air-introduced machine 10 successively by low temperature nitrogen intake pipeline, cooler 11 cools down, by gas
Stream is delivered to the material of blender 7 in Cyclone bag dust collector 8, the nitrogen after respectively obtaining dry polyamide section and filtering
Gas；Dry polyamide section is discharged through discharge valve 9；Nitrogen circulation after cooling is utilized.
Claims (1)
1. the pressure/vacuum type rotary drum polymerizable crystallizable method of polyamide section, comprises the following steps：
(1), under normal temperature, the vavuum pump in pressure/vacuum type drum dried, reaction and the crystal system of polyamide section is opened（5）,
To rotary drum dryer（1）Vacuumized so as to vacuum to -0.1MPa；Then the rotary drum is opened under the vacuum condition
Drying machine（1）Entry/exit material mouth（12）, by described for the polyamide that need to be dry section suction rotary drum dryer（1）Interior, close described
Entry/exit material mouth（12）；
The pressure/vacuum type drum dried of the polyamide section, reaction and crystal system include rotary drum dryer（1）, filter
Device（2）, condenser（4）, mixing silo（6）, Cyclone bag dust collector（8）；The rotary drum dryer（1）Top be provided with band from
The entry/exit material mouth of dynamic switch（12）, its axle is provided with nitrogen inlet（13）, its shaft end is by pipeline IV and the filter（2）
It is connected, its chuck is provided with heat conduction oil-in（14）, the heat conduction oil-in（14）Respectively by pipeline I and conduction oil heating system
Or cooling system is connected；The entry/exit material mouth（12）Be arranged right below the mixing silo（6）, the mixing silo（6）Bottom
Portion is connected with blender（7）；The Cyclone bag dust collector（8）Discharging opening be provided with discharge valve（9）, its top side is provided with purging
Nitrogen inlet（15）, its top opposite side is provided with exhaust outlet（16）, its bottom side is provided with import（17）；The import（17）Logical
Pipeline II is crossed with the blender（7）Material outlet be connected；The blender（7）Gas access by the warp successively of pipeline III
Cooler（11）, air-introduced machine（10）It is connected with low temperature nitrogen intake pipeline；The exhaust outlet（16）Respectively with the pipeline III, described
Low temperature nitrogen intake pipeline is connected；The filter（2）Side be provided with compressed nitrogen entrance（18）, its top is connected with surge tank
（3）, the surge tank（3）Outlet by pipeline V and the condenser（4）Top be connected；The condenser（4）Exhaust
Mouth is connected with vavuum pump（5）, its side is connected with recirculated water return pipe I respectively（19）, recirculated water upper hose I（20）, its bottom is provided with
Drainpipe（21）；The vavuum pump（5）Recirculated water return pipe II is connected with respectively（22）, recirculated water upper hose II（23）；The pipe
Line V is provided with valve（24）, the valve（24）By controlling cable and the surge tank（3）Pressure controller be connected；Described
Rotary drum dryer（1）Shaft end seal using packing seal and the combined sealing structure of shaft end of mechanical seal two-stage；The condensation
Device（4）With the cooler（11）Pattern be shell-and-tube, board-like, finned in any one；The vavuum pump（5）'s
Pattern is the pattern of water ring vacuum pump+Roots vaccum pump；
(2) under normal temperature condition, by the rotary drum dryer（1）Nitrogen inlet（13）Compressed nitrogen is filled with, does the rotary drum
Dry machine（1）Pressure rise to 0.2MPa；
(3) by the conduction oil in heat-conducting oil heating system by pipeline I through the rotary drum dryer（1）Heat conduction oil-in（14）
Input, rotary drum dryer described in indirectly heat（1）, make the temperature of polyamide section be increased to 260 DEG C, the drum dried
Machine（1）Pressure rise to 2.6MPa；Then under conditions of 260 DEG C of constant temperature, constant voltage 2.6MPa, the rotary drum dryer（1）
Stablizing 1 ~ 2h makes polyamide section activation, reaction and crystallizes；While obtaining nitrogen and steam gas；
The nitrogen and steam gas enter filter by pipeline IV（2）, by the filter（2）Enter after filtration slow
Rush tank（3）, in the surge tank（3）Middle through pressure controller adjust pressure to during 0.4MPa enter condenser（4）Condensation, respectively
Obtain nitrogen and lime set；The nitrogen is by vavuum pump（5）Discharge, the lime set is by drainpipe（21）It is expelled directly out；
(4) after terminating, under conditions of 260 DEG C of constant temperature, by the rotary drum dryer（1）Pressure be down to normal pressure；Then exist
Under conditions of 260 DEG C of constant temperature, constant voltage 2.6MPa, vavuum pump is opened（5）, to the rotary drum dryer（1）Be evacuated to-
0.1MPa, and maintain 3 ~ 4h；Finally, under vacuum, by the conduction oil in heat conduction oil cooling system by pipeline I through described
Rotary drum dryer（1）Heat conduction oil-in（14）Input, cools down the rotary drum dryer indirectly（1）, so that the polyamide is cut into slices
Temperature drop to less than 100 DEG C by 260 DEG C；
(5), below 100 DEG C and under condition of normal pressure, the polyamide is cut into slices by the rotary drum dryer（1）The entry/exit material
Mouthful（12）Discharging enters mixing silo（6）, expect blender side by side（7）；
(6) low temperature nitrogen is by low temperature nitrogen intake pipeline successively through air-introduced machine（10）Supercharging, cooler（11）After cooling, by gas
Flow the blender（7）Material be delivered to Cyclone bag dust collector（8）In, respectively obtain dry polyamide section and mistake
Nitrogen after filter；The polyamide of the drying is cut into slices through discharge valve（9）Discharge；Nitrogen circulation after the cooling is utilized.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510165061.8A CN104817692B (en) | 2015-04-09 | 2015-04-09 | The pressure/vacuum type drum dried of polyamide section, reaction and method for crystallising |
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| CN201510165061.8A CN104817692B (en) | 2015-04-09 | 2015-04-09 | The pressure/vacuum type drum dried of polyamide section, reaction and method for crystallising |
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| CN104817692A CN104817692A (en) | 2015-08-05 |
| CN104817692B true CN104817692B (en) | 2017-03-08 |
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| CN105937834A (en) * | 2016-06-23 | 2016-09-14 | 张家港新丝纬化纤有限公司 | Conveying device of chips dried by vacuum dry air |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2302488Y (en) * | 1997-08-13 | 1998-12-30 | 李振华 | Continuous vacuum crystallization drying apparatus |
| CN102060992A (en) * | 2010-11-02 | 2011-05-18 | 北京三联虹普新合纤技术服务股份有限公司 | Process for producing high-viscosity chips by applying solid-phase viscosifying technology |
| CN102190796A (en) * | 2010-03-04 | 2011-09-21 | 天华化工机械及自动化研究设计院 | Technique for drying para-aramid micropowder by recycling inert gas |
| CN202754930U (en) * | 2012-08-09 | 2013-02-27 | 福建锦江科技有限公司 | High-capacity polyamide slicing polymerization system with multiple-effect evaporation function |
-
2015
- 2015-04-09 CN CN201510165061.8A patent/CN104817692B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2302488Y (en) * | 1997-08-13 | 1998-12-30 | 李振华 | Continuous vacuum crystallization drying apparatus |
| CN102190796A (en) * | 2010-03-04 | 2011-09-21 | 天华化工机械及自动化研究设计院 | Technique for drying para-aramid micropowder by recycling inert gas |
| CN102060992A (en) * | 2010-11-02 | 2011-05-18 | 北京三联虹普新合纤技术服务股份有限公司 | Process for producing high-viscosity chips by applying solid-phase viscosifying technology |
| CN202754930U (en) * | 2012-08-09 | 2013-02-27 | 福建锦江科技有限公司 | High-capacity polyamide slicing polymerization system with multiple-effect evaporation function |
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