CN203782063U - System for recycling caprolactam from extraction water for producing polyamide-6 chips - Google Patents
System for recycling caprolactam from extraction water for producing polyamide-6 chips Download PDFInfo
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- CN203782063U CN203782063U CN201420105232.9U CN201420105232U CN203782063U CN 203782063 U CN203782063 U CN 203782063U CN 201420105232 U CN201420105232 U CN 201420105232U CN 203782063 U CN203782063 U CN 203782063U
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Abstract
The utility model discloses a system for recycling caprolactam from extraction water for producing polyamide chips. The system comprises a triple-effect evaporator, a concentrate tank and a cracker, wherein the triple-effect evaporator is used for concentrating extraction water; the concentrate tank and the cracker are connected with the outlet of the triple-effect evaporator; a heating sleeve and a self-circulation pipeline are arranged outside the concentrate tank; the outlet of the concentrate tank is connected to two filters through a switch valve; the filters are connected to the inlet of the cracker through a conveying pipeline; a conveying pump and a flowmeter are arranged on the conveying pipeline. The system for recycling caprolactam from extraction water for producing polyamide-6 chips disclosed by the utility model is characterized by further comprising a caprolactam storage tank, wherein the caprolactam storage tank is also connected to the inlet of the cracker through a liquid supply pipe; a liquid supply valve is arranged on the liquid supply pipe. According to the utility model, when the filters get out of order and flow on the conveying pipeline is fluctuated or cut off, the liquid supply valve can be opened artificially or automatically; caprolactam solution stored in the caprolactam storage tank can be supplied into the cracker, therefore, the liquid level in the cracker is steady; the quality of products is ensured.
Description
Technical field
The utility model relates to a kind of production unit of chinlon 6 section, especially a kind of extraction water hexanolactam recovery system of chinlon 6 section production use.
Background technology
Polyamide 6 section, is commonly called as chinlon 6 section, nylon 6 slice, is the important raw and processed materials of producing polyamide fibre 6.In the production process of chinlon 6 section, there is the process of a underwater cutpellet, in pelletizing process, in extraction water, water content has the hexanolactam of 15% left and right, can purify to 78%-85% through concentrating unit, so the hexanolactam in extraction water can be used as the raw materials for production use of chinlon 6 section again.
Existing extraction water hexanolactam recovery system comprises carries out concentrated triple-effect evaporator to extraction water, the concentrated flow container and the cracker that are connected with the outlet of triple-effect evaporator, described concentrated flow container peripheral hardware has heating jacket and self-circulation pipeline, and the outlet of this concentrated flow container is connected with two strainers by switching valve, described strainer connects the import of described cracker by transport pipe, in process of production, thereby the phenomenon that strainer easily occurs to stop up affects output flow, the time that switching need to be longer between two strainers in addition, such as: when in triple-effect evaporator, certain valve or pump produce fault, the output concentration of triple-effect evaporator is just unstable, in concentrated flow container, when being less than 120 ℃, feed temperature will produce crystalline polamer, and will produce polymerism during higher than 125 ℃, these all easily cause the obstruction of strainer, and the output concentration shakiness of triple-effect evaporator produces larger fluctuation by the water content that causes feed liquid in concentrated flow container, in self-circulation heat-processed, also can produce temperature fluctuation, thereby produce crystallization or polymerism.When strainer fault or while switching, the liquid level of cracker ingress will produce even cutout of fluctuation, cause after cracking concentrated solution to enter product quality shakiness after polymerizing pipe reaction, and the while also affects the work-ing life of cracker.
Owing to there being such problem, so be necessary the extraction water hexanolactam recovery system of existing chinlon 6 section production use to improve.
Summary of the invention
The purpose of this utility model is a kind of extraction water hexanolactam recovery system that can guarantee the polyamide fibre section production use of the normal work of cracker when strainer fault designing in order to solve the deficiency of above-mentioned technology.
The extraction water hexanolactam recovery system of the polyamide fibre section production use that the utility model is designed, comprise extraction water is carried out to concentrated triple-effect evaporator, the concentrated flow container and the cracker that are connected with the outlet of triple-effect evaporator, described concentrated flow container peripheral hardware has heating jacket and self-circulation pipeline, and the outlet of this concentrated flow container is connected with two strainers by switching valve, described strainer connects the import of described cracker by transport pipe, on transport pipe, be provided with transferpump and under meter, it is characterized in that also comprising hexanolactam storage tank, described hexanolactam storage tank also connects the import of described cracker by liquid supplementation pipe, in described liquid supplementation pipe, be provided with make-up valve.
As preferably:
The signal of described under meter inputs to a controller, and described make-up valve is controlled in described controller output;
Preferred scheme also comprises a steam supply device, this steam supply device comprises steam manifold, steam-supply pipe, return pipe, vapor can and vapor jet pump, its steam inlet connection steam manifold of described vapor jet pump, its bleeding point connect described vapor can, its steam drain connects described steam-supply pipe, described steam-supply pipe is connected with the steam inlet of an effect tank in triple-effect evaporator, described return pipe is connected with vapor can, and described return pipe is also connected with the vapour outlet of an effect tank in triple-effect evaporator, such scheme, steam-supply pipe can be the steam jacket steam supply outside an effect tank, return pipe can reclaim the steam that the steam jacket from an effect tank is discharged, this part reclaims steam and is comprised of steam and water of condensation, the final steam that reclaims is stored in vapor can, when producing, when passing through vapor jet pump, steam manifold live steam out can produce negative pressure, negative pressure can be by the recovered steam in vapor can also suction to vapor jet pump, both are the steam jacket steam supply outside an effect tank jointly after mixing also supercharging, form thus effectively circulation, steam has just obtained good recycling like this, the residue heat energy reclaiming in steam can be fully used, thereby reach energy-conservation object.
Further improving is that described return pipe is connected with vapor can by a taper bucket; When such scheme recovered steam passes through taper bucket, recovered steam makes progress away, and water of condensation is to dirty, and taper bucket can be separated recovered steam and water of condensation better, is more conducive to the recycling of recovered steam.
Nichrome wire is posted in the bottom that further improvement can also be described taper bucket, on taper bucket bottom surface, is interval with the bar that dams; Owing to entering taper bucket time space from return pipe, sharply increase, the fluctuation of pressure makes water of condensation more easily be converted into steam, employing is partly implemented heat protocol at taper bucket can obtain more steam, the arranging of bar of damming can, for the dirty obstruction that arranges of water of condensation, can better be heated water of condensation; The electrical heating wire heats being attached on taper bucket bottom surface is more even.
Further improvement can be that described vapor can below is provided with water pot again, between described vapor can and water pot, is provided with support bar; Described vapor can communicates by a strainer tube and a upflow tube with water pot, is provided with filtration weighting material in strainer tube; Described water pot middle part is provided with filtering membrane, in water pot bottom, is provided with water tap; Such scheme has water of condensation purification function, for there is the water of steam, need to pass through the steps such as deoxygenation, deionization, therefore the water of condensation forming in steam-pipe in fact can be thought the deionized water with impurity, and after removal impurity, this partial condensation water can be used as the finish diluent (certainly also can be used on elsewhere) in production process.In process of production; water of condensation can down ooze bit by bit by the filtration weighting material in strainer tube on the one hand; thereby effectively remove impurity; when water of condensation is too much; the water of condensation that surpasses upflow tube can directly enter in water pot by upflow tube again; can prevent from like this because liquid level is too high, return pipe being blocked; guarantee not affect the normal recovery of water of condensation; water of condensation in water pot can further be removed impurity by filtering membrane; what therefore from water tap, emit is pure deionized water, can be in industrial use.
The extraction water hexanolactam recovery system of the polyamide fibre section production use that the utility model is designed, its beneficial effect is: when strainer breaks down, when the flow rate fluctuation on transport pipe or cutout, under meter can detect the generation of this problem, then can adopt artificial or automatic mode to open make-up valve, the caprolactam solution of hexanolactam storage tank stores can fill in cracker, thereby guarantees level stability in cracker, reaches the effect of polymerization product stay in grade.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment 1;
Fig. 2 is the structural representation of embodiment 2;
Fig. 3 is the structural representation of embodiment 3;
Fig. 4 is the structural representation of embodiment 4 steam supply devices;
Fig. 5 is the structural representation of embodiment 5 steam supply device taper buckets;
Fig. 6 is the structural representation of embodiment 6 steam supply device vapor cans and water pot;
In figure: triple-effect evaporator 1, concentrated flow container 2, cracker 3, switching valve 4, strainer 5, transport pipe 6, transferpump 7, under meter 8, hexanolactam storage tank 9, liquid supplementation pipe 10, make-up valve 11, controller 12, steam supply device 13, steam manifold 14, steam-supply pipe 15, return pipe 16, vapor can 17, vapor jet pump 18, the steam inlet 19 of one effect tank, the vapour outlet 20 of one effect tank, taper bucket 21, nichrome wire 22, bar 23 dams, support bar 24, water pot 25, strainer tube 26, upflow tube 27, filter weighting material 28, filtering membrane 29, water tap 30, heating jacket 31, self-circulation pipeline 32, extraction water import 32, pump 33.
Embodiment
Below by embodiment, the utility model will be further described by reference to the accompanying drawings.
Embodiment 1:
As shown in Figure 1, the extraction water hexanolactam recovery system of the described chinlon 6 section production of the present embodiment use, comprise extraction water is carried out to concentrated triple-effect evaporator 1, the concentrated flow container 2 and the cracker 3 that are connected with the outlet of triple-effect evaporator 1, outer heating jacket 31 and the self-circulation pipeline 32 of being provided with of described concentrated flow container 2, and the outlet of this concentrated flow container 2 is connected with two strainers 5 by switching valve 4, described strainer 5 connects the import of described cracker 3 by transport pipe 6, on transport pipe 6, be provided with transferpump 7 and under meter 8, it is characterized in that also comprising hexanolactam storage tank 9, described hexanolactam storage tank 9 also connects the import of described cracker 3 by liquid supplementation pipe 10, in described liquid supplementation pipe 10, be provided with make-up valve 11.
The extraction water hexanolactam recovery system of the described chinlon 6 section production of the present embodiment use, its beneficial effect is: when strainer 5 breaks down, when the flow rate fluctuation on transport pipe 6 or cutout, under meter 8 can detect the generation of this problem, then can adopt artificial mode to open make-up valve 11, the caprolactam solution that hexanolactam storage tank 9 stores can fill in cracker 3, thereby guarantees the interior level stability of cracker 3, reaches the effect of polymerization product stay in grade.
Embodiment 2:
As shown in Figure 2, the extraction water hexanolactam recovery system of the described chinlon 6 section production of the present embodiment use, as different from Example 1: the signal of described under meter 8 inputs to a controller 12, described make-up valve 11 is controlled in described controller 12 outputs; The extraction water hexanolactam recovery system of the described chinlon 6 section production of the present embodiment use, automatization and Du Genggao can automatically open make-up valve 11 and fill into caprolactam solution when strainer 5 breaks down, thereby guarantee the interior level stability of cracker 3.
Embodiment 3:
As shown in Figure 3, the extraction water hexanolactam recovery system of the described chinlon 6 section production of the present embodiment use, as different from Example 2: also comprise a steam supply device 13, this steam supply device 13 comprises steam manifold 14, steam-supply pipe 15, return pipe 16, vapor can 17 and vapor jet pump 18, described vapor jet pump 18 its steam inlets connect steam manifold 14, its bleeding point connects described vapor can 17, its steam drain connects described steam-supply pipe 15, described steam-supply pipe 15 is connected with the steam inlet 19 of an effect tank in triple-effect evaporator 1, described return pipe 16 is connected with vapor can 17, described return pipe 16 is also connected with the vapour outlet 20 of an effect tank in triple-effect evaporator 1,
Embodiment 4:
As shown in Figure 4, the extraction water hexanolactam recovery system of the described chinlon 6 section production of the present embodiment use, as different from Example 3: described return pipe 16 is connected with vapor can 17 by a taper bucket 21.
Embodiment 5:
As shown in Figure 5, the extraction water hexanolactam recovery system of the described chinlon 6 section production of the present embodiment use as different from Example 4: nichrome wire 22 is posted in the bottom of described taper bucket 21, is interval with the bar 23 that dams on taper bucket 21 bottom surfaces.
Embodiment 6:
As shown in Figure 6, the extraction water hexanolactam recovery system of the described chinlon 6 section production of the present embodiment use, as different from Example 3: described vapor can 17 belows are provided with water pot 25, between described vapor can 17 and water pot 25, are provided with support bar 24; Described vapor can 17 communicates by a strainer tube 26 and a upflow tube 27 with water pot 25, is provided with and filters weighting material 28 in strainer tube 26; Described water pot 25 middle parts are provided with filtering membrane 29, in water pot 25 bottoms, are provided with water tap 30.
It should be noted that, can also on the basis of embodiment 4 and 5, be similar to the change of the present embodiment.
Specific embodiment described herein is only to design of the present utility model explanation for example.The utility model person of ordinary skill in the field can make various modifications or supplements or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.
Claims (8)
1. the extraction water hexanolactam recovery system of a chinlon 6 section production use, comprise extraction water is carried out to concentrated triple-effect evaporator (1), the concentrated flow container (2) and the cracker (3) that are connected with the outlet of triple-effect evaporator (1), outer heating jacket (31) and the self-circulation pipeline (32) of being provided with of described concentrated flow container (2), and the outlet of this concentrated flow container (2) is connected with two strainers (5) by switching valve (4), described strainer (5) connects the import of described cracker (3) by transport pipe (6), on transport pipe (6), be provided with transferpump (7) and under meter (8), it is characterized in that also comprising hexanolactam storage tank (9), described hexanolactam storage tank (9) also connects the import of described cracker (3) by liquid supplementation pipe (10), in described liquid supplementation pipe (10), be provided with make-up valve (11).
2. the extraction water hexanolactam recovery system of chinlon 6 section production use according to claim 1, is characterized in that the signal of described under meter (8) inputs to a controller (12), and described make-up valve (11) is controlled in described controller (12) output.
3. the extraction water hexanolactam recovery system of chinlon 6 section production use according to claim 1 and 2, it is characterized in that also comprising a steam supply device (13), this steam supply device (13) comprises steam manifold (14), steam-supply pipe (15), return pipe (16), vapor can (17) and vapor jet pump (18), its steam inlet of described vapor jet pump (18) connects steam manifold (14), its bleeding point connects described vapor can (17), its steam drain connects described steam-supply pipe (15), described steam-supply pipe (15) is connected with the steam inlet (19) of an effect tank in triple-effect evaporator (1), described return pipe (16) is connected with vapor can (17), described return pipe (16) is also connected with the vapour outlet (20) of an effect tank in triple-effect evaporator (1).
4. the extraction water hexanolactam recovery system of chinlon 6 section production use according to claim 3, is characterized in that described return pipe (16) is connected with vapor can (17) by a taper bucket (21).
5. the extraction water hexanolactam recovery system of chinlon 6 section production use according to claim 4, is characterized in that nichrome wire (22) is posted in the bottom of described taper bucket (21), on taper bucket (21) bottom surface, is interval with the bar that dams (23).
6. the extraction water hexanolactam recovery system of chinlon 6 section production use according to claim 3, is characterized in that described vapor can (17) below is provided with water pot (25), is provided with support bar (24) between described vapor can (17) and water pot (25); Described vapor can (17) communicates by a strainer tube (26) and a upflow tube (27) with water pot (25), is provided with and filters weighting material (28) in strainer tube (26); Described water pot (25) middle part is provided with filtering membrane (29), in water pot (25) bottom, is provided with water tap (30).
7. the extraction water hexanolactam recovery system of chinlon 6 section production use according to claim 4, is characterized in that described vapor can (17) below is provided with water pot (25), is provided with support bar (24) between described vapor can (17) and water pot (25); Described vapor can (17) communicates by a strainer tube (26) and a upflow tube (27) with water pot (25), is provided with and filters weighting material (28) in strainer tube (26); Described water pot (25) middle part is provided with filtering membrane (29), in water pot (25) bottom, is provided with water tap (30).
8. the extraction water hexanolactam recovery system of chinlon 6 section production use according to claim 5, is characterized in that described vapor can (17) below is provided with water pot (25), is provided with support bar (24) between described vapor can (17) and water pot (25); Described vapor can (17) communicates by a strainer tube (26) and a upflow tube (27) with water pot (25), is provided with and filters weighting material (28) in strainer tube (26); Described water pot (25) middle part is provided with filtering membrane (29), in water pot (25) bottom, is provided with water tap (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420105232.9U CN203782063U (en) | 2014-03-10 | 2014-03-10 | System for recycling caprolactam from extraction water for producing polyamide-6 chips |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420105232.9U CN203782063U (en) | 2014-03-10 | 2014-03-10 | System for recycling caprolactam from extraction water for producing polyamide-6 chips |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203782063U true CN203782063U (en) | 2014-08-20 |
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ID=51318269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420105232.9U Expired - Fee Related CN203782063U (en) | 2014-03-10 | 2014-03-10 | System for recycling caprolactam from extraction water for producing polyamide-6 chips |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203782063U (en) |
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2014
- 2014-03-10 CN CN201420105232.9U patent/CN203782063U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140820 Termination date: 20180310 |
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| CF01 | Termination of patent right due to non-payment of annual fee |