CN209865996U - Auxiliary material adding system capable of improving prepolymerization scaling - Google Patents
Auxiliary material adding system capable of improving prepolymerization scaling Download PDFInfo
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- CN209865996U CN209865996U CN201920032530.2U CN201920032530U CN209865996U CN 209865996 U CN209865996 U CN 209865996U CN 201920032530 U CN201920032530 U CN 201920032530U CN 209865996 U CN209865996 U CN 209865996U
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- tank
- titanium dioxide
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- mixing
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- 239000000463 material Substances 0.000 title claims abstract description 26
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 100
- 238000002156 mixing Methods 0.000 claims abstract description 99
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 claims abstract description 78
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 51
- 239000002253 acid Substances 0.000 claims abstract description 48
- 239000000725 suspension Substances 0.000 claims abstract description 35
- 239000007788 liquid Substances 0.000 claims abstract description 34
- 150000001412 amines Chemical class 0.000 claims abstract description 31
- 238000007599 discharging Methods 0.000 claims abstract description 11
- 238000006116 polymerization reaction Methods 0.000 claims description 36
- 239000002994 raw material Substances 0.000 claims description 25
- 230000003068 static effect Effects 0.000 claims description 4
- 239000011259 mixed solution Substances 0.000 abstract description 14
- 239000000243 solution Substances 0.000 abstract description 14
- 238000012824 chemical production Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 17
- 239000002245 particle Substances 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 6
- 238000005086 pumping Methods 0.000 description 6
- 239000004952 Polyamide Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229920002647 polyamide Polymers 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229920000768 polyamine Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- CNPURSDMOWDNOQ-UHFFFAOYSA-N 4-methoxy-7h-pyrrolo[2,3-d]pyrimidin-2-amine Chemical compound COC1=NC(N)=NC2=C1C=CN2 CNPURSDMOWDNOQ-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Landscapes
- Polyamides (AREA)
Abstract
The utility model discloses an auxiliary material system that can improve prepolymerization scale deposit of chemical production equipment technical field, including mixing blending tank, amine blending liquid head tank, titanium dioxide suspension head tank, fresh caprolactam head tank, sour head tank and blender, amine blending liquid head tank, titanium dioxide suspension head tank and fresh caprolactam head tank all communicate with the feed inlet of mixing blending tank through mixing the inlet pipe, the discharge gate and the mixed discharging pipe of mixing blending tank are connected, the utility model discloses amine blending liquid delivery pump, titanium dioxide suspension delivery pump and acid pump all are the measuring pumps, and control ratio that can be fine has simplified original feed proportioning system, and is more convenient; the titanium dioxide is dissolved in the mixed solution in advance, and the mixed solution of the amine blending solution, the titanium dioxide suspension and the fresh caprolactam is diluted, so that the PH value is increased, and the scaling amount is reduced.
Description
Technical Field
The utility model relates to a chemical production equipment technical field especially relates to an auxiliary material interpolation system that can improve prepolymerization scale deposit.
Background
In recent years, the polyamine industry is rapidly developed, the requirement promotes the rapid increase of the production capacity of polyamine, and as for the polyamide industry, various polyamide products have various good performances and are widely applied, particularly excellent textile performance, natural fibers are replaced in many aspects, so that the development and competition of the polyamide industry products are increasingly fierce, and in the existing polyamide polymerization process flow, the feeding mode of auxiliary materials is as follows: the acid and the amine are blended in the same blending tank, the blended acid and the amine are mixed in proportion, then the mixed acid and the fresh caprolactam are mixed, finally the mixture enters a polymerization tower through a dynamic mixer and a static mixer to react, the prepolymerized material is subjected to final polymerization, underwater granulation, three-section extraction, continuous drying and cooling to obtain a product, and research shows that the product enters raw and auxiliary materials of the prepolymerization tower, and the material enters the prepolymerization tower to react to form a serious compound, namely a scale body, at relevant temperature and pressure because the pH value of a mixed solution is reduced under the condition that titanium dioxide powder, the acid and the amine exist at the same time.
Because the titanium dioxide is heated and pressed in the polymerization reaction tower under the condition of lower PH value and reacts with other auxiliary materials to form a compound, and the formed scale is obviously enhanced along with the reduction of the PH value, the concentration of the added acid liquor of the auxiliary material is changed in order to avoid the formation of the compound, thereby changing the PH value of the acid solution entering the prepolymerization tower so as to prevent the acid solution from forming a compound with the coagulation, the adjustment of the acid solution concentration is a troublesome operation, even if the concentration is adjusted to meet the production requirement, the acid liquid still reacts with the titanium dioxide particles in the titanium dioxide suspension to generate a compound, and the scale is formed in the polymerization reaction tower, and when the titanium dioxide is dissolved in the amine blending liquid and the fresh caprolactam, the acid does not contact the titanium dioxide particles, and the acid is merely mixed into the mixed solution in which the titanium dioxide is dissolved, and even if the acid is sufficiently stirred and mixed, the scale is hardly generated.
Based on this, the utility model designs a can improve auxiliary material interpolation system of prepolymerization scale deposit to solve above-mentioned problem.
Disclosure of Invention
An object of the utility model is to provide a can improve auxiliary material addition system of prepolymerization scale deposit, can simplify the feeding system in the polymerization tower, the effectual production probability that reduces the complex in the polymerization tower reduces the scale deposit condition in the polymerization tower, reduces the frequency of wasing the polymerization tower.
The utility model discloses a realize like this: the utility model provides a can improve auxiliary material interpolation system of prepolymerization scale deposit, mixes liquid head tank, titanium dioxide suspension head tank, fresh caprolactam head tank, sour head tank and blender including mixing blending tank, amine blending liquid head tank, titanium dioxide suspension head tank and fresh caprolactam head tank all through mixing the feed inlet intercommunication that inlet pipe and mixing blending tank were all mixed, the discharge gate that mixes blending tank is connected with mixed discharging pipe, the export that mixes the discharging pipe and sour head tank all are connected with the feed inlet of blender, the discharge gate and the polymerization tower inlet pipe of blender are connected.
Further, the amine blending liquid raw material tank is communicated with a feed inlet of the mixing and blending tank through an amine blending liquid feed pump.
Further, the feeding pump of the amine blending liquid is a metering pump.
Further, the titanium dioxide suspension raw material tank is communicated with the feed inlet of the mixing and blending tank through a titanium dioxide suspension feed pump.
Further, the titanium dioxide suspension feeding pump is a metering pump.
Further, the fresh caprolactam raw material tank is communicated with the feed inlet of the mixing and blending tank through a fresh caprolactam feeding pump.
Further, the fresh caprolactam feed pump is a centrifugal pump.
Further, the acid raw material tank is connected with the feed inlet of the mixer through an acid pump.
Further, the acid pump is a metering pump, and the mixer is a static mixer.
The utility model has the advantages that: the amine blending liquid feeding pump, the titanium dioxide suspension liquid feeding pump and the acid pump are metering pumps, so that the ratio can be well controlled, the original blending system is simplified, and the blending is more convenient; the system is more beneficial to production, is carefully checked in practice and production, obtains results through innovation, has changed production systems, plays an important role in the polymerization industry of fresh caprolactam, greatly reduces the scaling condition of a caprolactam polymerization reaction tower, improves the product quality, also reduces the cleaning frequency of the polymerization reaction tower, prolongs the service life of equipment, and only needs to change the adding sequence of the existing acid solution without changing the concentration of the acid solution.
Drawings
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1-mixed blending tank, 11-mixed discharging pipe, 111-discharging port valve, 12-mixed feeding pipe, 2-amine blending liquid feeding pump, 21-amine blending liquid raw material tank, 3-titanium dioxide suspension feeding pump, 31-titanium dioxide suspension raw material tank, 4-fresh caprolactam feeding pump, 41-fresh caprolactam raw material tank, 5-acid pump, 51-acid raw material tank, 6-mixer and 61-polymerization tower feeding pipe.
Detailed Description
Referring to fig. 1, the present invention provides a technical solution: an auxiliary material adding system capable of improving prepolymerization scaling comprises a mixing and blending tank 1, an amine blending liquid raw material tank 21, a titanium dioxide suspension raw material tank 31, a fresh caprolactam raw material tank 41, an acid raw material tank 51 and a mixer 6, wherein the amine blending liquid raw material tank 21, the titanium dioxide suspension raw material tank 31 and the fresh caprolactam raw material tank 41 are all communicated with a feeding hole of the mixing and blending tank 1 through a mixing feeding pipe 12, a discharging hole of the mixing and blending tank 1 is connected with a mixing discharging pipe 11, an outlet of the mixing discharging pipe 11 and the acid raw material tank 51 are all connected with a feeding hole of the mixer 6, and a discharging hole of the mixer 6 is connected with a feeding pipe 61 of a polymerization tower, so that the proportioning can be well controlled, the original blending system is simplified, and the system is more convenient; the system is more beneficial to production, is carefully checked in practice and production, obtains results through innovation, changes are already made to the production system, plays an important role in the polymerization industry of fresh caprolactam, greatly reduces the scaling condition of a caprolactam polymerization reaction tower, improves the product quality, also reduces the cleaning frequency of the polymerization reaction tower, prolongs the service life of equipment, and only needs to change the adding sequence of the existing acid solution without changing the concentration of the acid solution.
Wherein, the amine blending liquid raw material tank 21 is communicated with the feed inlet of the mixing blending tank 1 through an amine blending liquid feed pump 2, the amine blending liquid feed pump 2 is a metering pump, the feeding is accurate and convenient, the system is simplified, the titanium dioxide suspension raw material tank 31 is communicated with the feed inlet of the mixing blending tank 1 through a titanium dioxide suspension feed pump 3, the titanium dioxide suspension feed pump 3 is a metering pump, the pumping of the titanium dioxide suspension is convenient, the fresh caprolactam raw material tank 41 is communicated with the feed inlet of the mixing blending tank 1 through a fresh caprolactam feed pump 4, the fresh caprolactam feed pump 4 is a metering pump, the pumping of the fresh caprolactam is convenient, the system is simplified, the acid raw material tank 51 is connected with the feed inlet of a mixer 6 through an acid pump 5, the acid pump 5 is a metering pump, the acid liquid is finally added, the scaling is reduced, the mixer 6 is a static mixer, and the acid liquid is, facilitating the subsequent steps.
One specific application of the embodiment is as follows: the system described in the present invention, when blending amine blending liquid, titanium dioxide suspension, fresh caprolactam and acid, needs to be operated to the system by the following method:
step 1, closing a discharge port valve 111 of a mixing and blending tank 1, pumping a certain amount of amine blending liquid into the mixing and blending tank 1 through an amine blending liquid feeding pump 2, pumping a certain amount of titanium dioxide suspension into the mixing and blending tank 1 through a titanium dioxide suspension feeding pump 3, pumping fresh caprolactam into the mixing and blending tank 1 through a fresh caprolactam feeding pump 4, and presetting a ratio of the amine blending liquid, the titanium dioxide suspension and the fresh caprolactam;
step 2, fully stirring the amine blending liquid, the titanium dioxide suspension and the fresh caprolactam which are sent into the mixing and blending tank 1 until titanium dioxide particles in the titanium dioxide suspension are dispersed and dissolved to form a mixed solution;
step 3, opening a discharge port valve 111 of the mixing and blending tank 1, simultaneously opening an acid pump 5, pumping the acid solution in the acid raw material tank 51 into a mixing discharge pipe 11, mixing the acid solution and the mixed solution in which the titanium dioxide is dissolved in the step 2, and feeding the mixed solution into a mixer 6;
step 4, uniformly mixing a mixed solution formed by the amine blending solution, the titanium dioxide suspension and the fresh caprolactam with an acid solution in a mixer 6, and then feeding the mixed solution into a polymerization reaction tower through a feeding pipe 61 of the polymerization tower;
the previous method is that titanium dioxide is not dissolved in advance, at the moment, titanium dioxide is still in a suspension state, acid liquor is mixed, titanium dioxide suspension particles react with acid, the more uniform the acid liquor and the titanium dioxide particles are mixed, the more scale is formed after reaction, the lower pH value can cause materials to form a compound in a prepolymerization tower, namely, a scale body can influence the product quality and damage production equipment, the system dissolves the titanium dioxide in the mixed solution in advance, the acid can only be mixed with the mixed solution in which the titanium dioxide is dissolved for the second time, so that the acid liquor can not be contacted with the suspended titanium dioxide particles, the mixed solution of amine blending liquid, titanium dioxide suspension and fresh caprolactam is diluted to improve the pH value, when the mixed solution is mixed with the acid liquor, the pH value can not be too low, and scale can not be formed, the system can control the pH value in the polymerization reaction tower to be 7-9.5 by operation, thereby effectively solving the problems of low pH value and titanium dioxide scaling;
the feeding amount of the fresh caprolactam feeding pump 4 is determined according to the feeding time of a pipeline, the dosage of other blending liquid required to be mixed is determined according to the amount of the fresh caprolactam, the fresh caprolactam feeding pump 4 is a centrifugal pump determined according to the process requirement, so the system is more suitable for production, and the amine blending liquid feeding pump 2, the titanium dioxide suspension feeding pump 3 and the acid pump 5 are metering pumps, so the proportioning can be well controlled, the original proportioning system is simplified, the system is more convenient, and the scaling amount is reduced, the system is more beneficial to production, is carefully checked in practice and production, obtains results through innovation, changes are made to the production system, the system is put into production, plays an important role in the polymerization industry of the fresh caprolactam, greatly reduces the scaling condition of a caprolactam polymerization reaction tower, improves the product quality, the cleaning frequency of the polymerization reaction tower is also reduced, and the service life of equipment is prolonged;
the auxiliary material adding mode of the system effectively reduces the concentration of the raw mixed material, improves the pH value of the mixed solution, dilutes the raw solution, solves the problem that titanium dioxide particles are condensed in a polymerization reaction tower, and avoids polymerization scaling; the improvement of the technology ensures that the control of the polymerization production process is more stable, the process production is smoother, and the quality improvement of the product is better ensured.
Although specific embodiments of the present invention have been described, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the claims appended hereto.
Claims (9)
1. The utility model provides a can improve auxiliary material addition system of prepolymerization scale deposit which characterized in that: including mixing blending tank (1), amine blending liquid head tank (21), titanium dioxide suspension head tank (31), fresh caprolactam head tank (41), acid head tank (51) and blender (6), amine blending liquid head tank (21), titanium dioxide suspension head tank (31) and fresh caprolactam head tank (41) all communicate with the feed inlet of mixing blending tank (1) through mixing inlet pipe (12), the discharge gate of mixing blending tank (1) is connected with mixed discharging pipe (11), the export of mixed discharging pipe (11) and acid head tank (51) all are connected with the feed inlet of blender (6), the discharge gate and polymerization tower inlet pipe (61) of blender (6) are connected.
2. An auxiliary material adding system capable of improving pre-polymerization fouling according to claim 1, wherein: the amine blending liquid raw material tank (21) is communicated with a feed inlet of the mixing blending tank (1) through an amine blending liquid feed pump (2).
3. An auxiliary material adding system capable of improving pre-polymerization fouling according to claim 2, wherein: the amine blending liquid feeding pump (2) is a metering pump.
4. An auxiliary material adding system capable of improving pre-polymerization fouling according to claim 1, wherein: the titanium dioxide suspension raw material tank (31) is communicated with the feed inlet of the mixing and blending tank (1) through a titanium dioxide suspension feed pump (3).
5. An auxiliary material adding system capable of improving pre-polymerization fouling according to claim 4, wherein: the titanium dioxide suspension feeding pump (3) is a metering pump.
6. An auxiliary material adding system capable of improving pre-polymerization fouling according to claim 1, wherein: the fresh caprolactam raw material tank (41) is communicated with a feed inlet of the mixing and blending tank (1) through a fresh caprolactam feeding pump (4).
7. An auxiliary material adding system capable of improving pre-polymerization fouling according to claim 6, wherein: the fresh caprolactam feeding pump (4) is a centrifugal pump.
8. An auxiliary material adding system capable of improving pre-polymerization fouling according to claim 1, wherein: the acid raw material tank (51) is connected with the feed inlet of the mixer (6) through an acid pump (5).
9. An auxiliary material adding system capable of improving pre-polymerization fouling according to claim 8, wherein: the acid pump (5) is a metering pump, and the mixer (6) is a static mixer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920032530.2U CN209865996U (en) | 2019-01-09 | 2019-01-09 | Auxiliary material adding system capable of improving prepolymerization scaling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920032530.2U CN209865996U (en) | 2019-01-09 | 2019-01-09 | Auxiliary material adding system capable of improving prepolymerization scaling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209865996U true CN209865996U (en) | 2019-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920032530.2U Active CN209865996U (en) | 2019-01-09 | 2019-01-09 | Auxiliary material adding system capable of improving prepolymerization scaling |
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| Country | Link |
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| CN (1) | CN209865996U (en) |
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- 2019-01-09 CN CN201920032530.2U patent/CN209865996U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 301 Houcuo, Zhangliu Village, Jiangtian, Changle District, Fuzhou, 350200, Fujian Province Patentee after: Fujian Liheng Nylon Industry Co.,Ltd. Country or region after: China Address before: 350218 Binhai Industrial Zone, Changle City, Fuzhou City, Fujian Province Patentee before: CHANGLE LIHENG POLYAMIDE TECHNOLOGY Co.,Ltd. Country or region before: China |
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| CP03 | Change of name, title or address |