CN104896902A - Polyamide-6 granula nitrogen drying heat exchange system - Google Patents
Polyamide-6 granula nitrogen drying heat exchange system Download PDFInfo
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- CN104896902A CN104896902A CN201410539538.XA CN201410539538A CN104896902A CN 104896902 A CN104896902 A CN 104896902A CN 201410539538 A CN201410539538 A CN 201410539538A CN 104896902 A CN104896902 A CN 104896902A
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Abstract
The invention provides a polyamide-6 granula nitrogen drying heat exchange system. Damp and hot nitrogen is discharged from the top of a drying tower and is conveyed to a first nitrogen circulating fan via a nitrogen filter; nitrogen coming out from the first nitrogen circulating fan is divided into two parts; one part enters a spray cooling system via a nitrogen heat exchanger and the other part is conveyed to a nitrogen inlet in the middle of the drying tower after being heated by a first nitrogen heater; the nitrogen in the spraying cooling system is discharged from a nitrogen outlet after being cooled, passes through the nitrogen heat exchanger, a second nitrogen circulating fan, a nitrogen purifying device and a second nitrogen heater in order and is divided into two parts at the outlet of the second nitrogen heater, the two parts entering the drying tower via two nitrogen inlets at a taper sealing head at the bottom of the drying tower; wet polyamide-6 granulas enter the drying tower from the top of the drying tower and are discharged from the bottom end of the drying tower after drying to a polyamide-6 granula cooling bin system. The system is characterized in that the objective of heat exchange is achieved by using high-temperature damp and hot nitrogen to heat low-temperature nitrogen, so that energy is comprehensively utilized, energy consumption is reduced and the production cost is reduced.
Description
Technical field
The present invention is specifically related to a kind of chinlon 6 section nitrogen drying heat-exchange system.
Background technology
Polyamide 6 section, is commonly called as chinlon 6 section, nylon 6 slice.Because containing amido link (-C-NH-) in large molecule, therefore be called polyamide.Chinlon 6 section is usually in white bar graininess, and fusing point is 210-220 DEG C, and decomposition temperature is about 300 DEG C.Dissolve in the concentrated sulfuric acid of phenol and heat, electrical insulation capability is superior, alkaline-resisting, good corrosion resistance.Polyamide fibre is the fiber that in synthetic fibers, anti-wear performance is best.Because it has excellent wearability and decay resistance, become the primary raw material of tire dipped type cord fabric, when polyamide fibre 6 is produced, adopt caprolactam solid to be raw material, obtained by melting, batching, pre-polymerization, polymerization, casting section, extraction, drying.
In existing production technology, nitrogen continuous drying is used in dry run, wet section after dehydration enters drying tower from continuous drying top of tower, section in drying tower with hot nitrogen counter current contacting, section slowly flows downward with certain speed, discharge bottom drying tower after drying, wet nitrogen is extracted out from tower top, enter in the middle part of drying tower after the heating of part heater via, another part enters attemperator cooling, then enter bottom spray column, with the low-temperature cooling water counter current contacting sprayed from spray column top, the dust separation making the moisture in nitrogen and carry secretly, and then heater via heating, enter in tower from drying tower bottom, reuse.Use in nitrogen drying process, need to heat nitrogen, need to expend more heat energy, and the nitrogen process of drying has and needs cooler to lower the temperature, energy does not fully utilize, and causes larger energy dissipation.The circulating nitrogen gas of discharging from drying tower top contains a large amount of moisture, must through spray column cooling removing moisture content, and the nitrogen after spray column is returned bottom drying tower re-use because temperature needs on the low side are reheated utilization, and energy consumption is too high.
Summary of the invention
For solving the problems of the technologies described above, the present invention proposes a kind of chinlon 6 section nitrogen drying heat-exchange system, thus reach the object reducing energy consumption, reduce production cost.
For achieving the above object, technical scheme of the present invention is as follows:
A kind of chinlon 6 section nitrogen drying heat-exchange system,
Mainly comprise section cooling storehouse system, drying tower, nitrogen gas filters one, nitrogen circulation blower fan one, nitrogen circulation blower fan two, nitrogen heat exchanger, spray cooling system, nitrogen heater one, nitrogen heater two and nitrogen decontamination plant;
Damp and hot nitrogen is discharged from the top of drying tower, nitrogen circulation blower fan one is transported to through nitrogen gas filters one, two-way is divided into from nitrogen circulation blower fan one nitrogen out, one tunnel enters spray cooling system through nitrogen heat exchanger, and the nitrogen inlet in the middle part of drying tower is transported on another road after nitrogen heater one heats;
Discharge from nitrogen outlet after nitrogen cooling in spray cooling system, successively through nitrogen heat exchanger, nitrogen circulation blower fan two, nitrogen decontamination plant and nitrogen heater two, two-way is divided into enter drying tower from the nitrogen inlet of two conical head bottom drying tower respectively from the outlet of nitrogen heater two;
Wet section enters drying tower from drying tower top, is expelled to section cooling storehouse system after drying from drying tower bottom.
Preferably, described section cooling storehouse system comprises section cooling storehouse and nitrogen cooling system, described nitrogen cooling system comprises two nitrogen coolers, nitrogen circulation blower fan three and the dust filter unit that are set up in parallel, hot nitrogen is discharged from the top in section cooling storehouse, after dust filter unit and nitrogen circulation blower fan three, enter nitrogen cooler, cooled nitrogen enters from the bottom in section cooling storehouse.
Preferably, described spray cooling system comprises water cooling tower, two plate type heat exchangers be set up in parallel and two water-circulating pumps be set up in parallel, and hot water inputs to the cooling water inlet on water cooling tower top successively from the bottom of water cooling tower through water-circulating pump and plate type heat exchanger.
Preferably, the bottom sides of described water cooling tower is also provided with immersion groove.
Preferably, revolution discharging machine is provided with between described drying tower and section cooling storehouse system
The present invention's advantage is compared with prior art:
In the present invention, after the cooled nitrogen of water cooling tower needs heating, just can input to drying tower, this part nitrogen is in low-temperature condition before heating; And need cooling from drying tower damp and hot nitrogen out, the demand of both utilizations is different, namely utilizes the damp and hot nitrogen being in the condition of high temperature to heat to the nitrogen of low-temperature condition, reaches the object of heat exchange, achieve the comprehensive utilization of energy, reduce energy consumption, reduce production cost.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below.
Fig. 1 is the structural representation of a kind of chinlon 6 section nitrogen drying heat-exchange system disclosed in the embodiment of the present invention 1.
1. drying tower 2. nitrogen gas filters 1 nitrogen circulation blower fan 1 nitrogen heat exchanger 5. water cooling tower 6. nitrogen heater 1 nitrogen circulation blower fan 2 8. nitrogen decontamination plant 9. nitrogen heater 2 10. revolution discharging machine 11. section cooling storehouse 12. nitrogen cooler 13. nitrogen circulation blower fan 3 14. dust filter unit 15. plate type heat exchanger 16. water-circulating pump 17. immerses groove
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.
Embodiment 1.
As shown in Figure 1, a kind of chinlon 6 section nitrogen drying heat-exchange system,
Mainly comprise section cooling storehouse system, drying tower, nitrogen gas filters one, nitrogen circulation blower fan one, nitrogen circulation blower fan two, nitrogen heat exchanger, spray cooling system, nitrogen heater one, nitrogen heater two and nitrogen decontamination plant;
Damp and hot nitrogen is discharged (temperature is at 110-120 degree) from the top of drying tower 1, nitrogen circulation blower fan 1 is transported to through nitrogen gas filters 1, two-way is divided into from nitrogen circulation blower fan one nitrogen out, one tunnel enters the water cooling tower 5 (spray water temperature≤20 degree) in spray cooling system through nitrogen heat exchanger 4, the nitrogen inlet in the middle part of drying tower is transported on another road after nitrogen heater 1 heats;
Discharge from nitrogen outlet after nitrogen cooling in water cooling tower 5, successively through nitrogen heat exchanger 4, nitrogen circulation blower fan 27, nitrogen decontamination plant 8 and nitrogen heater 29, two-way is divided into enter drying tower from the nitrogen inlet of two conical head bottom drying tower respectively from the outlet of nitrogen heater two;
Wet section enters drying tower 1 from drying tower top, discharges after drying from drying tower 1 bottom, transports to the section cooling storehouse 11 in the system of section cooling storehouse through revolution discharging machine 10.
Described section cooling storehouse system comprises section cooling storehouse 11 and nitrogen cooling system, described nitrogen cooling system comprises two nitrogen coolers 12, nitrogen circulation blower fan 3 13 and the dust filter unit 14 that are set up in parallel, hot nitrogen is discharged from the top in section cooling storehouse, after dust filter unit and nitrogen circulation blower fan three, enter nitrogen cooler, cooled nitrogen enters from the bottom in section cooling storehouse.
Described spray cooling system comprises water cooling tower 5, two plate type heat exchangers be set up in parallel 15 and two water-circulating pumps be set up in parallel 16, and hot water inputs to the cooling water inlet on water cooling tower top successively from the bottom of water cooling tower through water-circulating pump and plate type heat exchanger.
The bottom sides of described water cooling tower is also provided with and immerses groove 17, for collecting the water after unnecessary water or gas-liquid separation.
Above-mentioned nitrogen heater one and nitrogen heater two between nitrogen temperature after heating 130-140 degree, to guarantee effective work of whole system.
The present invention's advantage is compared with prior art:
In the present invention, after the cooled nitrogen of water cooling tower needs heating, just can input to drying tower, this part nitrogen is in low-temperature condition before heating; And need cooling from drying tower damp and hot nitrogen out, the demand of both utilizations is different, namely utilizes the damp and hot nitrogen being in the condition of high temperature to heat to the nitrogen of low-temperature condition, reaches the object of heat exchange, achieve the comprehensive utilization of energy, reduce energy consumption, reduce production cost.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (5)
1. a chinlon 6 section nitrogen drying heat-exchange system, is characterized in that,
Mainly comprise section cooling storehouse system, drying tower, nitrogen gas filters one, nitrogen circulation blower fan one, nitrogen circulation blower fan two, nitrogen heat exchanger, spray cooling system, nitrogen heater one, nitrogen heater two and nitrogen decontamination plant;
Damp and hot nitrogen is discharged from the top of drying tower, nitrogen circulation blower fan one is transported to through nitrogen gas filters one, two-way is divided into from nitrogen circulation blower fan one nitrogen out, one tunnel enters spray cooling system through nitrogen heat exchanger, and the nitrogen inlet in the middle part of drying tower is transported on another road after nitrogen heater one heats;
Discharge from nitrogen outlet after nitrogen cooling in spray cooling system, successively through nitrogen heat exchanger, nitrogen circulation blower fan two, nitrogen decontamination plant and nitrogen heater two, two-way is divided into enter drying tower from the nitrogen inlet of two conical head bottom drying tower respectively from the outlet of nitrogen heater two;
Wet section enters drying tower from drying tower top, is expelled to section cooling storehouse system after drying from drying tower bottom.
2. a kind of chinlon 6 section nitrogen drying heat-exchange system according to claim 1, it is characterized in that, described section cooling storehouse system comprises section cooling storehouse and nitrogen cooling system, described nitrogen cooling system comprises two nitrogen coolers, nitrogen circulation blower fan three and the dust filter unit that are set up in parallel, hot nitrogen is discharged from the top in section cooling storehouse, after dust filter unit and nitrogen circulation blower fan three, enter nitrogen cooler, cooled nitrogen enters from the bottom in section cooling storehouse.
3. a kind of chinlon 6 section nitrogen drying heat-exchange system according to claim 1 and 2, it is characterized in that, described spray cooling system comprises water cooling tower, two plate type heat exchangers be set up in parallel and two water-circulating pumps be set up in parallel, and hot water inputs to the cooling water inlet on water cooling tower top successively from the bottom of water cooling tower through water-circulating pump and plate type heat exchanger.
4. a kind of chinlon 6 section nitrogen drying heat-exchange system according to claim 3, it is characterized in that, the bottom sides of described water cooling tower is also provided with immersion groove.
5. a kind of chinlon 6 section nitrogen drying heat-exchange system according to claim 1,2 or 4, is characterized in that, is provided with revolution discharging machine between described drying tower and section cooling storehouse system.
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| CN201410539538.XA CN104896902A (en) | 2014-10-13 | 2014-10-13 | Polyamide-6 granula nitrogen drying heat exchange system |
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| CN201410539538.XA CN104896902A (en) | 2014-10-13 | 2014-10-13 | Polyamide-6 granula nitrogen drying heat exchange system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106766829A (en) * | 2016-11-21 | 2017-05-31 | 江苏弘盛新材料股份有限公司 | A kind of nylon 6 slice drying system |
| CN107030926A (en) * | 2017-05-27 | 2017-08-11 | 江苏华洋尼龙有限公司 | A kind of high-cleanness nylon chips production line and its production method |
| CN107053558A (en) * | 2017-05-27 | 2017-08-18 | 江苏华洋尼龙有限公司 | A kind of high-cleanness nylon chips drying device and production line |
| CN108007121A (en) * | 2016-10-28 | 2018-05-08 | 株式会社川田 | Drying device |
| CN108444230A (en) * | 2018-04-08 | 2018-08-24 | 长乐力恒锦纶科技有限公司 | A kind of drying cooling system of nylon polymerization slice production |
| CN108571864A (en) * | 2018-01-16 | 2018-09-25 | 江苏海阳锦纶新材料有限公司 | A kind of 6 coloured chip drying device of polyamide fibre and drying means |
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| CN202648357U (en) * | 2012-05-28 | 2013-01-02 | 江阴市强力化纤有限公司 | Nylon 6-drying nitrogen circulation system |
| CN202973812U (en) * | 2012-12-07 | 2013-06-05 | 浙江华建尼龙有限公司 | Drying device of nylon 6 slices |
| CN103834007A (en) * | 2012-11-22 | 2014-06-04 | 中国石油化工股份有限公司 | Solid phase tackifying method for continuous production of high viscosity polyamide 6 chips |
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| CN202648357U (en) * | 2012-05-28 | 2013-01-02 | 江阴市强力化纤有限公司 | Nylon 6-drying nitrogen circulation system |
| CN103834007A (en) * | 2012-11-22 | 2014-06-04 | 中国石油化工股份有限公司 | Solid phase tackifying method for continuous production of high viscosity polyamide 6 chips |
| CN202973812U (en) * | 2012-12-07 | 2013-06-05 | 浙江华建尼龙有限公司 | Drying device of nylon 6 slices |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108007121A (en) * | 2016-10-28 | 2018-05-08 | 株式会社川田 | Drying device |
| CN108007121B (en) * | 2016-10-28 | 2020-12-08 | 株式会社川田 | Drying device |
| CN106766829A (en) * | 2016-11-21 | 2017-05-31 | 江苏弘盛新材料股份有限公司 | A kind of nylon 6 slice drying system |
| CN106766829B (en) * | 2016-11-21 | 2019-03-19 | 江苏弘盛新材料股份有限公司 | A kind of nylon 6 slice drying system |
| CN107030926A (en) * | 2017-05-27 | 2017-08-11 | 江苏华洋尼龙有限公司 | A kind of high-cleanness nylon chips production line and its production method |
| CN107053558A (en) * | 2017-05-27 | 2017-08-18 | 江苏华洋尼龙有限公司 | A kind of high-cleanness nylon chips drying device and production line |
| CN108571864A (en) * | 2018-01-16 | 2018-09-25 | 江苏海阳锦纶新材料有限公司 | A kind of 6 coloured chip drying device of polyamide fibre and drying means |
| CN108444230A (en) * | 2018-04-08 | 2018-08-24 | 长乐力恒锦纶科技有限公司 | A kind of drying cooling system of nylon polymerization slice production |
| CN108444230B (en) * | 2018-04-08 | 2023-11-17 | 福建省力恒锦纶实业有限公司 | Drying and cooling system for nylon polymer slice production |
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Application publication date: 20150909 |