CN217042485U - Nylon 6 has light to spin raw materials charge-in system - Google Patents
Nylon 6 has light to spin raw materials charge-in system Download PDFInfo
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- CN217042485U CN217042485U CN202220106145.XU CN202220106145U CN217042485U CN 217042485 U CN217042485 U CN 217042485U CN 202220106145 U CN202220106145 U CN 202220106145U CN 217042485 U CN217042485 U CN 217042485U
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- caprolactam
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Abstract
The utility model discloses nylon 6 has the light to spin technical field, concretely relates to nylon 6 has light to spin raw materials charge-in system. The system comprises: a deoxygenation water pipeline, a caprolactam raw material tank, a benzoic acid preparation tank, a mixer and a polymerization reactor; the deoxygenated water pipeline is connected with a caprolactam raw material tank, the caprolactam raw material tank and a benzoic acid preparation tank are both connected with a mixer, and deoxygenated water, caprolactam and benzoic acid are fully mixed in the mixer and then enter a polymerization reactor for reaction. The utility model discloses with the interpolation position antedisplacement of the required deoxygenated water of polymerization, in the direct caprolactam medium head tank that adds, mix in the blender with auxiliary material benzoic acid after through caprolactam pump pressurization intensive mixing, then react in getting into polymerization reactor, guaranteed that deoxygenated water and raw materials caprolactam and auxiliary material homogeneous mixing in polymerization reactor, can maintain good product quality stability, in addition, need not to set up the buffering and the conveying system of deoxygenated water, reach energy-conserving effect.
Description
Technical Field
The utility model belongs to the technical field of nylon 6 has the light to spin, concretely relates to nylon 6 has light to spin raw materials charge-in system.
Background
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be taken as an acknowledgement or any form of suggestion that this information constitutes prior art that is already known to a person skilled in the art.
The nylon 6 bright spinning is a hydrolytic polymerization production process by taking caprolactam and deoxidized water as raw materials and adding a benzoic acid auxiliary material with a certain concentration under the condition that the deoxidized water is taken as an initiator, and in the prior art, the feeding process of the bright spinning process comprises the following steps: caprolactam, auxiliary material, deoxygenated water add polymerization reactor equipment inlet line respectively, and caprolactam and the auxiliary material benzoic acid of certain concentration are earlier behind a blender, and the reactor is gone into after a blender with the deoxygenated water that adds the pipeline again, and this feeding procedure's drawback lies in:
(1) the pressure of the deoxidized water coming from the outside is 0.20MPaG lower, the pressure of the feed pipe line of the polymerization reactor is 0.50MPaG higher, the deoxidized water can not directly enter the feed pipe line, and the deoxidized water needs to enter the deoxidized water buffer tank firstly and is pumped into the feed pipe line through the deoxidized water pump, so that the energy is consumed.
(2) Deoxygenated water is pumped into a feed pipeline through a deoxygenated water pump 9 and only passes through a mixer 2(05), the mixing time is short, the number of passing mixers is small, and the uneven mixing of water and other reactants after entering a reactor causes product fluctuation.
Therefore, the nylon 6 photo-spinning raw material feeding system which can uniformly mix the deoxygenated water, the caprolactam and the auxiliary materials and save energy has important significance.
SUMMERY OF THE UTILITY MODEL
The utility model provides a nylon 6 has light to spin raw materials charge-in system, with the interpolation position antedisplacement of the required deoxygenated water of polymerization, in the caprolactam medium head tank of direct addition, mix in the blender through caprolactam pump pressurization after intensive mixing and auxiliary material benzoic acid, then react in getting into the polymerization reactor, it mixes with raw materials caprolactam and auxiliary material homogeneous mixing in the polymerization reactor to have guaranteed the deoxygenated water, can maintain good product quality stability, moreover, need not to set up the buffering and the conveying system of deoxygenated water, reach energy-conserving effect.
In order to realize the purpose, the utility model provides a following technical scheme:
a nylon 6 has spinning raw materials feed system, includes: a deoxygenation water pipeline, a caprolactam raw material tank, a benzoic acid preparation tank, a mixer and a polymerization reactor;
the deoxygenated water pipeline is connected with a caprolactam raw material tank, the caprolactam raw material tank and a benzoic acid preparation tank are both connected with a mixer, and deoxygenated water, caprolactam and benzoic acid are fully mixed in the mixer and then enter a polymerization reactor for reaction.
One or more embodiments of the present invention have the following advantageous effects:
1) the utility model provides a nylon 6 has light to spin raw materials charge-in system, and the deoxygenated water adds the position antedisplacement, directly adds caprolactam medium head tank in, through caprolactam pump pressurization can the intensive mixing, then reacts in getting into polymerization reactor with auxiliary material benzoic acid mixture again, has guaranteed the deoxygenated water and has mixed with raw materials caprolactam and auxiliary material homogeneous mixing in polymerization reactor, can maintain good product quality stability.
2) The utility model provides a nylon 6 has light to spin raw materials charge-in system squeezes into caprolactam head tank with the deoxygenated water earlier, with caprolactam intensive mixing, has cancelled the buffering and the conveyor system of deoxygenated water, has saved deoxygenated water conveying system equipment energy resource consumption.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to constitute a limitation on the invention.
FIG. 1 is a schematic view of a nylon 6 organic light-spun raw material feeding system proposed in example 1
Wherein, 1 deoxidized water pipeline, 2 caprolactam raw material tank, 3 caprolactam transfer pump, 4 heat exchangers, 5 mixer A, 6 mixer B, 7 benzoic acid preparation tank, 8 benzoic acid transfer pump and 9 polymerization reactor.
Detailed Description
The technical solutions in the embodiments of the present invention will be described below clearly and completely, and it is obvious that the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides a nylon 6 has light to spin raw materials charge-in system, include: a deoxygenation water pipeline, a caprolactam raw material tank, a benzoic acid preparation tank, a mixer and a polymerization reactor;
the deoxygenated water pipeline is connected with a caprolactam raw material tank, the caprolactam raw material tank and a benzoic acid preparation tank are both connected with a mixer, and deoxygenated water, caprolactam and benzoic acid are fully mixed in the mixer and then enter a polymerization reactor for reaction.
Compared with the traditional raw material feeding process, the deoxygenated water is added with the position moved forward, is directly added into a caprolactam medium raw material tank, can be fully mixed by pressurization of a caprolactam pump, and then is mixed with the auxiliary material benzoic acid to enter a polymerization reactor for reaction, so that the deoxygenated water is uniformly mixed with the raw material caprolactam and the auxiliary material in the polymerization reactor, and good product quality stability can be maintained.
The deoxygenation water pipeline is connected with the caprolactam raw material tank, but not the benzoic acid auxiliary material tank, because the caprolactam is mutually soluble with water, the melting point of the caprolactam is higher than 69 ℃, and a small amount of water is added to reduce the melting point of the caprolactam and reduce the blockage of the pipeline; the solubility of the benzoic acid in water is low, and the concentration accuracy of the benzoic acid is not easy to control due to the addition of excessive water, so that the product quality is influenced.
Furthermore, a heat exchanger is arranged between the caprolactam raw material tank and the mixer, and the mixed liquid of caprolactam and deoxygenated water in the caprolactam raw material tank firstly rises in temperature through the heat exchanger and then enters the mixer.
Further, a caprolactam conveying pump is arranged between the caprolactam raw material tank and the heat exchanger, and the mixed solution of caprolactam and deoxygenated water is pressurized by the conveying pump and is conveyed to the heat exchanger;
further, the type of the heat exchanger is one of a shell-and-tube heat exchanger, a double-tube heat exchanger, a jacketed heat exchanger and a spray heat exchanger.
Further, a benzoic acid delivery pump is arranged between the benzoic acid preparation tank and the mixer;
further, a stirring device is arranged in the mixer, and the auxiliary raw materials are stirred and uniformly mixed;
furthermore, the mixer comprises a mixer A and a mixer B, and the mixer A and the mixer B are sequentially connected, so that the deoxidized water, the caprolactam and the benzoic acid are uniformly mixed.
Further, a gear pump and a pressure regulating valve are arranged between the mixer B and the polymerization reactor 9, and the raw materials in the mixer B enter the polymerization reactor after passing through the gear pump and the pressure regulating valve;
further, the polymerization reactor is connected with an underwater pelletizer, and the polymer obtained from the polymerization reactor is cut into slices by the underwater pelletizer to prepare nylon 6 slices.
Furthermore, a hot water jacket is arranged on the raw material conveying pipeline after passing through the heat exchanger.
Example 1
As shown in fig. 1, the utility model provides a nylon 6 has light to spin raw materials charge-in system, include: a deoxygenation water pipeline 1, a caprolactam raw material tank 2, a benzoic acid preparation tank 7, a mixer and a polymerization reactor 9; the deoxygenated water pipeline 1 is connected with a caprolactam raw material tank 2, so that deoxygenated water is directly mixed with caprolactam; the caprolactam raw material tank 2 and the benzoic acid preparation tank 7 are both connected with a mixer, and deoxygenated water, caprolactam and benzoic acid are fully mixed in the mixer and then enter a polymerization reactor 9 for reaction. A heat exchanger 4 is arranged between the caprolactam raw material tank 2 and the mixer, and the mixed liquid of caprolactam and deoxygenated water in the caprolactam raw material tank 2 firstly rises the temperature through the heat exchanger 4 and then enters the mixer. A caprolactam conveying pump is arranged between the caprolactam raw material tank 2 and the heat exchanger 4, and the mixed solution of caprolactam and deoxygenated water is pressurized and conveyed to the heat exchanger 4 by the conveying pump; the mixer comprises a mixer A and a mixer B, and the mixer A and the mixer B are connected in sequence, so that the deoxidized water, the caprolactam and the benzoic acid are uniformly mixed; a gear pump and a pressure regulating valve are arranged between the mixer B and the polymerization reactor 9, and the raw materials in the mixer B enter the polymerization reactor after passing through the gear pump and the pressure regulating valve. A benzoic acid delivery pump 8 is arranged between the benzoic acid preparation tank 7 and the mixer;
the working process comprises the following steps: deoxygenated water with the pressure of 0.20MPaG in a deoxygenated water pipeline 1 enters a caprolactam raw material tank 2 to be mixed with caprolactam, a caprolactam conveying pump pressurizes the mixed liquid of caprolactam and deoxygenated water at 85 ℃ to 0.50MPaG, the mixed liquid is pumped into a heat exchanger 4 and heated to 180 ℃, the mixed liquid of the caprolactam and the deoxygenated water which is discharged from the heat exchanger 4 and a benzoic acid auxiliary material which is sent by a benzoic acid metering pump 8 enter a mixer A to be mixed together, and then enter a mixer B to be fully mixed to generate polymerization reaction in a polymerization reactor 9.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention, so that the present invention will not be limited by the accompanying claims.
Claims (10)
1. A nylon 6 has light to spin raw materials charge-in system which characterized in that: the method comprises the following steps: a deoxygenation water pipeline, a caprolactam raw material tank, a benzoic acid preparation tank, a mixer and a polymerization reactor;
the deoxygenated water pipeline is connected with a caprolactam raw material tank, the caprolactam raw material tank and a benzoic acid preparation tank are both connected with a mixer, and deoxygenated water, caprolactam and benzoic acid are fully mixed in the mixer and then enter a polymerization reactor for reaction.
2. The nylon 6 glossy textile material feed system of claim 1, wherein: a heat exchanger is arranged between the caprolactam raw material tank and the mixer, and the mixed liquid of caprolactam and deoxygenated water in the caprolactam raw material tank firstly passes through the heat exchanger to be heated and then enters the mixer.
3. The nylon 6 glossy textile feed system of claim 2, wherein: a caprolactam conveying pump is arranged between the caprolactam raw material tank and the heat exchanger, and the mixed liquid of caprolactam and deoxygenated water is pressurized by the conveying pump and sent to the heat exchanger.
4. The nylon 6 glossy textile feed system of claim 2, wherein: the type of the heat exchanger is one of a shell-and-tube heat exchanger, a double-tube heat exchanger, a jacketed heat exchanger and a spray heat exchanger.
5. The nylon 6 glossy textile material feed system of claim 1, wherein: a benzoic acid delivery pump is arranged between the benzoic acid preparation tank and the mixer.
6. The nylon 6 glossy textile feed system of claim 1, wherein: and a stirring device is arranged in the mixer, and the auxiliary raw materials are stirred and mixed uniformly.
7. The nylon 6 glossy textile feed system of claim 1, wherein: the mixer comprises a mixer A and a mixer B, and the mixer A and the mixer B are sequentially connected.
8. The nylon 6 glossy material feed system of claim 7, wherein: a gear pump and a pressure regulating valve are arranged between the mixer B and the polymerization reactor, and the raw materials in the mixer B enter the polymerization reactor after passing through the gear pump and the pressure regulating valve.
9. The nylon 6 glossy textile material feed system of claim 1, wherein: and the polymerization reactor is connected with an underwater granulator, and the polymer obtained by the polymerization reactor is cut into slices by the underwater granulator to prepare nylon 6 slices.
10. The nylon 6 glossy textile feed system of claim 2, wherein: the raw material conveying pipeline after passing through the heat exchanger is provided with a hot water jacket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220106145.XU CN217042485U (en) | 2022-01-14 | 2022-01-14 | Nylon 6 has light to spin raw materials charge-in system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220106145.XU CN217042485U (en) | 2022-01-14 | 2022-01-14 | Nylon 6 has light to spin raw materials charge-in system |
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| Publication Number | Publication Date |
|---|---|
| CN217042485U true CN217042485U (en) | 2022-07-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220106145.XU Active CN217042485U (en) | 2022-01-14 | 2022-01-14 | Nylon 6 has light to spin raw materials charge-in system |
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| CN (1) | CN217042485U (en) |
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- 2022-01-14 CN CN202220106145.XU patent/CN217042485U/en active Active
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