CN212028899U - Anti-blocking pipeline for spandex spinning polymer - Google Patents
Anti-blocking pipeline for spandex spinning polymer Download PDFInfo
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- CN212028899U CN212028899U CN202020094609.0U CN202020094609U CN212028899U CN 212028899 U CN212028899 U CN 212028899U CN 202020094609 U CN202020094609 U CN 202020094609U CN 212028899 U CN212028899 U CN 212028899U
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- 238000009987 spinning Methods 0.000 title claims abstract description 26
- 229920002334 Spandex Polymers 0.000 title claims abstract description 22
- 239000004759 spandex Substances 0.000 title claims abstract description 22
- 229920000642 polymer Polymers 0.000 title claims abstract description 21
- 238000003756 stirring Methods 0.000 claims abstract description 24
- 229910001220 stainless steel Inorganic materials 0.000 claims description 10
- 239000010935 stainless steel Substances 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 abstract description 47
- 239000003292 glue Substances 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 239000011345 viscous material Substances 0.000 description 13
- 238000004519 manufacturing process Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 6
- 239000012530 fluid Substances 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 150000004985 diamines Chemical class 0.000 description 2
- 238000000578 dry spinning Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 241000208125 Nicotiana Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- -1 construction Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 125000005442 diisocyanate group Chemical group 0.000 description 1
- 150000002009 diols Chemical class 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002074 melt spinning Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000002156 mixing Methods 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
- 239000003208 petroleum Substances 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
- 238000002166 wet spinning Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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Abstract
The utility model discloses an anti-blocking pipeline for spandex spinning polymer, which belongs to the technical field of pipeline connection of spandex polymer, and comprises a stirring device, wherein a discharge port of the stirring device is connected with a flow meter, and the downstream end of the flow meter is also connected with a front hard connecting pipe; a rear hard connecting pipe is fixedly arranged at a feed inlet of the reactor; the vibrations hose, the vibrations hose passes through between hard connecting pipe in the front and the hard connecting pipe in back through flange joint, can pass through the vibrations of agitating unit and reactor, makes the both ends of vibrations hose receive the vibrations of different frequencies and range respectively, forces the unable viscidity material to glue at the pipe inner wall, effectively alleviates the condition of pipe blockage, has prolonged the jam time to the turning of pipeline has been removed through the hose, makes the material be difficult to pile up.
Description
Technical Field
The utility model relates to a spandex polymer's pipe connection technical field especially relates to a prevent stifled pipeline for spandex spinning polymer.
Background
According to the different spinning methods, the technological route of spandex production can be divided into solution spinning, melt spinning and chemical reaction spinning, wherein the solution spinning is divided into dry solution spinning and wet solution spinning according to the different solidification media. At present, dry spinning accounts for more than 80 percent of global spandex production, wet spinning accounts for about 10 percent, and other two spinning accounts for about 10 percent worldwide, but no chemical reaction method exists in China. The chemical reaction spinning method has the problems of complex process, low spinning speed, high production cost, large equipment investment, diamine environmental pollution and the like, and the possibility of development in the future is low.
Dry spinning with polyether diol and diisocyanate in a ratio of 1: 2 at certain reaction temperature and time, adding diamine for chain extension reaction to form block copolymer solution, mixing, filtering, defoaming and other steps to obtain spinning solution with homogeneous performance. Then quantitatively and uniformly pressing into the spinning head by using a metering pump. Under the action of pressure, the spinning solution is extruded from the capillary holes of the spinneret plate to form a filament trickle, and the filament trickle enters a channel, hot air is filled in the channel, so that the solvent in the filament trickle is quickly volatilized and taken away by the air, the filament concentration is continuously increased until the filament trickle is solidified, and meanwhile, the filament trickle is stretched and thinned and then wound into a certain package.
In the process of producing spandex spinning by any method, the spandex polymer is melted and then reacted, in the process, the additive needs to be added in the spandex polymer and is ensured to be uniformly stirred with the spandex polymer, and then the mixture after stirring is sent into a reactor for reaction, wherein the spandex polymer is relatively viscous, viscous materials are easy to adhere to the inner wall of a pipeline to form accumulation, and can be solidified and agglomerated after a long time, so that the viscous solidified materials are very easy to block the pipeline, and the pipeline blockage is that the flow is insufficient, and can cause production halt, so that the production halt caused by the pipeline blockage is very undesirable, and the serious consequence is caused by the small problem.
Based on this, the utility model designs a prevent stifled pipeline for spandex spinning polymer to solve above-mentioned problem.
Disclosure of Invention
An object of the utility model is to provide a prevent stifled pipeline for spandex spinning polymer can effectively reduce the possibility of pipe blockage to with the pipeline that the material vibrations of pipeline inner wall adhesion drop.
The utility model discloses a realize like this: an anti-blocking pipeline for a spandex spinning polymer comprises a stirring device, wherein a discharge port of the stirring device is connected with a flow meter, and the downstream end of the flow meter is also connected with a front hard connecting pipe;
a rear hard connecting pipe is fixedly arranged at a feed inlet of the reactor;
the vibration hose is connected between the front hard connecting pipe and the rear hard connecting pipe through a flange.
Furthermore, the vibration hose is a stainless steel pressure-resistant metal hose with a braided steel wire mesh sleeve wrapped outside.
Further, the inner diameter of the vibration hose is 7-15 mm.
Further, the vibration hose is connected between the front hard connecting pipe and the rear hard connecting pipe in a stretching and tightening manner.
The utility model has the advantages that: the utility model uses the stainless steel pressure-resistant metal hose which is externally wrapped with the woven steel wire mesh sleeve as the vibration hose, connects the stirring device with the reactor, ensures that the vibration hose is tensioned and straightened between the stirring device and the reactor, the stirring device and the reactor can rotate to cause the equipment to vibrate, and the vibration amplitudes and the frequencies of the reactor and the stirring device are completely different, thus leading the vibration amplitudes and the frequencies at the two ends of the vibration hose to be different, thus leading the vibration hose which continuously conveys materials to be in the vibration hose with two different vibration forces acting continuously, leading the vibration hose to feed materials to follow and keep the same vibration with the stirring device and the reactor which are fixedly connected together, leading the vibration hose to vibrate in different modes without resonance, and leading the vibration hose to continuously keep different vibration states by the two types of vibration instead, the device is equivalent to continuously shaking viscous materials in the shaking hose continuously, the shaking amplitude and frequency of two ends of the shaking hose are different, the shaking acting forces of two ends are most concentrated at the corners of the hose, the corners which are easy to block are also the corners, the corners of the bending channels of the shaking hose are gentler than those of a straight pipeline, the materials can pass through more easily, the device utilizes different shaking of equipment to shake the materials continuously, the viscous materials are forced to generate different shaking amplitudes continuously with the inner wall of the pipeline, the materials are difficult to stick to the inner wall of the shaking hose, the blocking condition of the shaking hose is effectively improved and slowed down, the shaking hose of the device is more convenient to disassemble and easier to clean, if the flow displayed by the flow meter is reduced, the pipeline is probably partially blocked, and at the moment, a blunt weight is required to be placed on the shaking path of the shaking hose, the vibration hose can continuously vibrate and impact the blunt device, namely the hammer is used for repeatedly knocking the vibration hose with high frequency, so that the viscous materials adhered to the hose can be forced to fall off from the vibration hose, the operation is convenient, the time for blocking the pipeline is prolonged, the pipeline can maintain the maintenance period of a production line, and the stable operation of the equipment in the production period is ensured.
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 view of the present invention;
fig. 2 is a schematic diagram of the structure of the eliminating pipe network.
In the drawings, the components represented by the respective reference numerals are listed below:
1-stirring device, 11-flowmeter, 12-front hard connecting pipe, 2-vibration hose, 3-reactor, 31-rear hard connecting pipe and 4-hard connecting pipe.
Detailed Description
Referring to fig. 1 and 2, the present invention provides a technical solution: an anti-blocking pipeline for a spandex spinning polymer comprises a stirring device 1, wherein a discharge port of the stirring device 1 is connected with a flow meter 11, and the downstream end of the flow meter 11 is also connected with a front hard connecting pipe 12;
a rear hard connecting pipe 31 is fixedly arranged at a feed inlet of the reactor 3;
Wherein, the vibration hose 2 is a stainless steel pressure-resistant metal hose which is wrapped with a woven steel wire mesh sleeve, so that the inner layer and the outer layer can generate different vibrations and can generate light small amplitude impact to effectively impact and drop materials to the inner wall of the vibration hose 2 and increase the strength of the vibration hose 2, so that the impact resistance of a pipeline is stronger, the inner diameter of the vibration hose 2 is 7-15mm, the vibration amplitude and the impact resistance of the pipeline with the diameter are stronger, the pipeline is too thin and easy to block, the vibration transmission strength of the pipeline is not enough due to too thick pipeline, the materials are easy to accumulate, the diameter of the pipeline with the size is not small, the materials are not easy to block and accumulate, the vibration hose 2 is stretched and tightly connected between the front hard connecting pipe 12 and the rear hard connecting pipe 31, the stretched vibration hose 2 is more sensitive to the reaction of the vibration and the transmission is more thorough, if the pipeline is longer, the pipeline is slightly shaken instead of vibrated, and only when the hose is tightened and straightened, the vibration of the stirring device 1 and the reactor 3 can be accurately and timely transmitted to the vibrating hose.
In a specific embodiment of the present invention:
the embodiment of the utility model provides a through providing a prevent stifled pipeline for spandex spinning polymer, the utility model provides a technical problem be: the problem of pipe blockage of a polyurethane polymer conveying pipeline can only occur in a pipeline which is not stirred between a polyurethane polymer melting state stirring device and a reactor, because the hard connecting pipes are fixedly connected to ensure the stable conveying of the pipeline in order to keep the stability of the pipeline and avoid fluid from impacting the pipeline, the original pipeline construction is realized, the pipeline construction is very stable by using the hard connecting pipes 4 because the vibration amplitude is avoided to be overlarge, so that the pipeline is not easy to damage, the corners of the pipeline can be more, as shown in figure 2, the original flowing material is ensured to smoothly flow through flowing internal pressure, but the material is sticky, the viscous material is not easy to be washed clean by the internal pressure, the material adhered to the inner wall of the pipeline can be slowly accumulated, and a layer of accumulated material can be formed in 1-2 months, particularly, at the corner of the hard connecting pipe 4, the pressure direction changes, so that the materials at the corner are difficult to wash out, the pipeline is blocked after the time is longer and thicker, the more the corners are, the more the pipeline is easy to block, the hard connecting pipe 4 is stably connected, fluid cannot have more external force in the pipeline and only can be pushed by the pressure of the fluid, so that viscous fluid materials in the pipeline are easy to block, and the pipeline is required to be frequently disassembled and cleaned;
after changing the pipeline, mainly need utilize the vibrations of agitating unit and reactor, make the pipeline produce the vibrations of different frequency and range, just so can be equivalent to two people and hold the both ends of pipeline, the different power of incessantly using shakes the pipeline, and used vibrations hose 2, make the interior material of pipeline vibrate continuously, avoid sticky material to glue and condense at the inner wall of vibrations hose 2, just even glue and hold, also can shake through vibrations and break away from sticky material, because the material is sticky liquid, and the pipeline is the solid, two kinds of different materials are when vibrations take place like this, vibration amplitude is different, will make the material vibrations break away from vibrations hose 2, this is the technical problem that meets in actual production, combine the technical scheme that the actual conditions was made through creative work.
The embodiment of the utility model provides an in technical scheme for solving above-mentioned problem, the general thinking is as follows:
for better understanding of the above technical solutions, the following detailed descriptions will be provided in conjunction with the drawings and the detailed description of the embodiments.
The utility model discloses when the installation, dismantle original hard connecting pipe 4, directly connect the vibrations between reactor 3 and agitating unit 1 on vibrations hose 2, just so need to connect agitating unit 1 and flowmeter 11 through hard pipeline and transmit vibrations, then preceding hard connecting pipe 12 of hard flanged is connected on the export of flowmeter 11, then the entry of reactor 3 is connected through back hard connecting pipe 31, transmit vibrations with hard pipe connection, then use the stainless steel withstand voltage metal hose that the outside wrapped up the braided wire net cover as vibrations hose 2, because the frequency that agitating unit 1 and reactor 3 bring for preceding hard connecting pipe 12 and back hard connecting pipe 31 is higher, will lead to vibrations frequency difference in the outer layer of vibrations hose 2 like this, need ensure vibrations hose 2 is straight taut during the installation, vibrations hose 2 can not crooked pendant, only if the vibration is straightened, the high-frequency vibration can be transmitted in time.
When the utility model is used, viscous materials in the stirring device 1 flow into the flow meter 11 under the action of pressure, then the viscous materials flow into the vibration hose through the front hard connecting pipe 12, the vibration generated by the rotation of the corrosion stirring device 1 can directly act on the front end of the vibration hose 2, the materials continuously flow under the action of pressure, the materials can enter the reactor 3 through the back hard connecting pipe 31, the operation of the reactor 3 can generate vibration with another different frequency, the vibration can be directly transmitted to the rear end of the vibration hose 2 through the back hard connecting pipe 31, as shown in figure 1, the front and rear ends of the upper and lower reaches of the vibration hose 2 can be in the same way, the frequencies are different, and the different vibration frequencies and amplitudes at the two ends can lead the interaction force to be concentrated on the vibration hose 2, so that the vibration hose 2 can not resonate with any equipment, so the materials in the inner part can not resonate with the vibration hose 2, the vibration frequency of the vibration hose 2 is not coordinated and asynchronous, the vibration amplitude is distorted, the amplitude of one end of the vibration hose 2 is larger, the other end of the vibration hose is possibly smaller, the stress in the hose is irregular, the condition that materials in the pipeline vibrate along with the vibration hose 2 under the action of inertia is avoided, the materials and the vibration hose 2 are kept in asynchronous vibration, the materials are effectively prevented from being adhered to the inner wall of the pipeline, the vibration amplitude of the embodiment is within 5mm, but the frequency is higher, the current vibration frequency is 100-200 times per minute, so that the hose can vibrate at higher frequency in a small amplitude range, the vibration is not allowed in the conventional pipeline design, the design of the device is in accordance with the actual production requirement of equipment, the materials are continuously separated from the vibration hose 2 by utilizing vibration, and the materials are effectively prevented from being adhered in the pipeline, the viscous materials only stay at the curved channel or the corner, and the materials on the straight pipe can be continuously pushed under the action of internal pressure, so that the materials on the straight pipe are not easy to adhere and accumulate, all corners generated by using the hard connecting pipe 4 are removed, the curved channel is used by using the vibrating hose 2 instead, the inner wall of the pipeline is smoother, and the corners are not available, so that the viscous materials are not easy to accumulate;
if the flow rate detected by the flowmeter 11 is significantly reduced, which may result in insufficient subsequent production materials, and thus the flow rate is not designed in advance, it may be that a part of the vibration hose 2 is also blocked, which results in a reduced inner diameter, and thus a reduced flow rate, and then the solution to be primarily solved is to use a heavy blunt tool to abut against the vibration hose 2, for example, a heavy stone pier or a heavy hammer is stably and closely placed on the vibration path of the vibration hose 2, so that when the vibration hose 2 vibrates, the outer wall will continuously impact the blunt tool, which is equivalent to knocking the vibration hose 2 with a heavy hammer at a high frequency, and the knocking will make the materials already adhered to the vibration hose 2 reach a stronger impact, and when the adhered materials move along with the frequency of the vibration hose 2, the vibration hose 2 suddenly moves in a reverse direction of being deformed by the impact of the blunt tool, while the inner materials continue to advance under the action of inertia, at the moment, the adhered materials are impacted and vibrated to be soft and fall off.
The utility model uses the stainless steel pressure-resistant metal hose which is externally wrapped with the woven steel wire mesh sleeve as the vibration hose 2, connects the stirring device 1 and the reactor 3, ensures that the vibration hose 2 is tensioned and stretched between the stirring device 1 and the reactor 3, the stirring device 1 and the reactor 3 continuously run and rotate to cause the equipment to vibrate, the vibration amplitude and the frequency of the reactor 3 and the stirring device 1 are completely different, the vibration amplitude and the frequency of the two ends of the vibration hose 2 are also different, thus, in the vibration hose 2 which continuously conveys materials, two different vibration forces are continuously acted in the vibration hose 2, the vibration hose 2 can feed materials to follow and keep the same vibration with the stirring device 1 and the reactor 3 which are fixedly connected together, thus, the vibration hose 2 is subjected to different vibration forces, and resonance can not occur, on the contrary, the two kinds of vibrations always keep the two ends of the vibration hose 2 in different vibration states, which is equivalent to the continuous vibration of viscous materials in the vibration hose 2 without stopping, and the vibration amplitudes and frequencies of the two ends of the vibration hose 2 are different, while the vibration acting forces of the two ends are most concentrated at the corners of the hose, and the corners which are most easily blocked are also corners, the corners of the bent channels of the vibration hose 2 are more moderate than those of a straight pipeline, the materials are easier to pass through, the device recycles different vibrations of the equipment, continuously vibrates the materials, forces the viscous materials to generate different vibration amplitudes with the inner walls of the pipeline, and ensures that the materials are difficult to be adhered to the inner walls of the vibration hose, thereby effectively improving and slowing down the blocking condition of the vibration hose 2, and the vibration hose 2 of the device is more convenient to disassemble and easier to clean, if the flow meter displays that the flow rate of, probably the pipeline has been partly stopped up, at this moment need place on the vibrations route of vibrations hose 2 with a blunt ware heavy object, vibrations hose 2 will be continuous vibrations striking on blunt ware, it beats vibrations hose 2 to be equivalent to take the high-frequency repetition of hammer, will force the viscous material of adhesion on the hose to break away from with vibrations hose 2 like this, and convenient for operation, the time of pipeline jam has been prolonged, make the pipeline can maintain the maintenance cycle of a production line, ensure the steady operation of equipment in the production cycle, and hard connecting pipe 4 can't warp and beat and make viscous material drop, and when vibrations hose 2 that has certain pliability is dismantled to wash, can be with vibrations hose 2 bending deformation, make the material deformation that bonds at the pipeline inner wall separate with the pipeline, hard connecting pipe 4 can not take place the deformation yet.
The stainless steel pressure-resistant metal hose is characterized by corrosion resistance, high temperature resistance, low temperature resistance (-196 ℃ to +420 ℃), light weight, small volume and good flexibility. The stainless steel pressure-resistant metal hose is a flexible element which is formed by weaving one or more layers of steel wires or steel belt net sleeves outside a stainless steel corrugated pipe, and joints or flange heads are matched at two ends of the stainless steel corrugated pipe and are used for conveying various media; the method is characterized in that: corrosion resistance, high temperature resistance, low temperature resistance (-196 ℃ to +420 ℃), light weight, small volume and good flexibility. The method is widely applied to industries such as aviation, aerospace, petroleum, chemical engineering, metallurgy, electric power, papermaking, wood, textile, construction, medicine, food, tobacco, traffic and the like.
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 (4)
1. An anti-blocking pipeline for a spandex spinning polymer is characterized in that: the device comprises a stirring device (1), wherein a discharge hole of the stirring device (1) is connected with a flowmeter (11), and the downstream end of the flowmeter (11) is also connected with a front hard connecting pipe (12);
a rear hard connecting pipe (31) is fixedly arranged at a feed inlet of the reactor (3);
the vibration hose (2) is connected between the front hard connecting pipe (12) and the rear hard connecting pipe (31) through flanges.
2. The anti-blocking pipeline for the spandex spinning polymer as claimed in claim 1, wherein: the vibration hose (2) is a stainless steel pressure-resistant metal hose with a braided steel wire mesh sleeve wrapped outside.
3. The anti-blocking pipeline for the spandex spinning polymer as claimed in claim 2, wherein: the inner diameter of the vibration hose (2) is 7-15 mm.
4. The anti-blocking pipeline for the spandex spinning polymer as claimed in claim 1, wherein: the vibration hose (2) is connected between the front hard connecting pipe (12) and the rear hard connecting pipe (31) in a stretching and tightening manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020094609.0U CN212028899U (en) | 2020-01-16 | 2020-01-16 | Anti-blocking pipeline for spandex spinning polymer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020094609.0U CN212028899U (en) | 2020-01-16 | 2020-01-16 | Anti-blocking pipeline for spandex spinning polymer |
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| Publication Number | Publication Date |
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| CN212028899U true CN212028899U (en) | 2020-11-27 |
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| CN202020094609.0U Active CN212028899U (en) | 2020-01-16 | 2020-01-16 | Anti-blocking pipeline for spandex spinning polymer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115591485A (en) * | 2022-11-25 | 2023-01-13 | 石家庄昊普科技有限公司（Cn） | Pyromellitic dianhydride reactor |
-
2020
- 2020-01-16 CN CN202020094609.0U patent/CN212028899U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115591485A (en) * | 2022-11-25 | 2023-01-13 | 石家庄昊普科技有限公司（Cn） | Pyromellitic dianhydride reactor |
| CN115591485B (en) * | 2022-11-25 | 2023-03-10 | 石家庄昊普科技有限公司 | Pyromellitic dianhydride reactor |
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Address after: 350200 Binhai Industrial Zone, Changle District, Fuzhou City, Fujian Province Patentee after: Fujian Hengshen Synthetic Fiber Technology Co.,Ltd. Country or region after: China Address before: 350218 Binhai Industrial Zone, Changle City, Fuzhou City, Fujian Province Patentee before: CHANGLE HENGSHEN SYNTHETIC FIBER Co.,Ltd. Country or region before: China |