CN107570086A - A kind of polyphenylene sulfide polymerization reaction kettle - Google Patents
A kind of polyphenylene sulfide polymerization reaction kettle Download PDFInfo
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- CN107570086A CN107570086A CN201711099823.4A CN201711099823A CN107570086A CN 107570086 A CN107570086 A CN 107570086A CN 201711099823 A CN201711099823 A CN 201711099823A CN 107570086 A CN107570086 A CN 107570086A
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Abstract
The present invention relates to chemical machinery stirred autoclave manufacturing technology field, specifically a kind of polyphenylene sulfide polymerization reaction kettle, including kettle, stirring motor, agitating shaft, agitator and magnetic driver device, the top of described kettle is provided with stirring motor, the output shaft of stirring motor is connected with the magnetic driver device put in kettle, the upper end of magnetic driver device is connected with stirring motor, the lower end of magnetic driver device is connected through shaft coupling with agitating shaft, agitating shaft is provided with agitator, it is characterized in that described kettle is provided with outer quick temperature control mechanism, interior aids in temperature control mechanism and the rabbling mechanism that prevents adhesion, with simple in construction, it is simple in construction, easy cleaning, reaction temperature is stablized easily-controllable, beneficial to working continuously, the advantages that efficient high yield.
Description
Technical field
The present invention relates to chemical machinery stirred autoclave manufacturing technology field, specifically a kind of simple in construction, structure
Simply, easy cleaning, reaction temperature stablize it is easily-controllable, beneficial to work continuously, the polyphenylene sulfide polymerization reaction kettle of efficient high yield.
Background technology
It is well known that polyphenylene sulfide (abbreviation PPS) is a kind of high-performance thermoplastic special engineering plastics, because it has resistance to height
The characteristic such as warm, resistant to chemical etching, excellent electrical properties and anti-flammability, is applied to multiple fields, world market consumption figure every year with
15%~20% speed increase promotes manufacturing enterprise constantly to expand production capacity.Domestic PPS main application fields are in military project, space flight
Industry, just accelerating in recent years to automobile and spare and accessory parts and the development of industrial electronic instrument field, therefore domestic PPS production
Amount is increasing year by year, but this is far from meeting the needs of domestic market is to PPS.Huge due to current capacity and output lacks
Mouthful, still there is sizable consumption figure come from import, it was reported that the U.S. (be mainly U.S. Philips petrochemistry company) every year to
PPS pellet of the Chinese exports containing glass fibre is up to 2000 tons, and Japan is every year to more than 1000 tons of Chinese exports PPS pellets.Due to
It is technical monopoly, expensive, very big production pressure, therefore the research work of poly-p-phenylene sulfide ether project are caused to domestic enterprise
It is extremely urgent.
At present, also there are technical conditions, the suitable high temperature of research and development based on sodium sulfide method synthesis PPS techniques accordingly in China
Continuous high production capacity completes the New type agitation reactor of hybrid process task under operating mode of pressurizeing, and still, is found in its technical process
2 emphasis problems need to overcome：First, polycondensation reaction is highly exothermic, control is relatively difficult, and temperature is too high, part
Solvent is decomposed, and the molecular weight polymers Partial digestion originally generated, color blackening, material deterioration, temperature is too low, and reaction is not
Thoroughly, the oligomer obtained is more, quality dissatisfaction；Second, viscosity is up to 5Pas, such high viscosity thing in PPS crystallization process
Material is easily adhered kettle wall and internals surface, causes temperature inequality, the unequal harmful effect of reaction.
The content of the invention
Present invention aim to address above-mentioned the deficiencies in the prior art, there is provided a kind of simple in construction, simple in construction, convenient clear
Reason, reaction temperature stablize it is easily-controllable, beneficial to work continuously, the polyphenylene sulfide polymerization reaction kettle of efficient high yield.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of polyphenylene sulfide polymerization reaction kettle, including kettle, stirring motor, agitating shaft, agitator and magnetic driver device, institute
The top for the kettle stated is provided with stirring motor, and the output shaft of stirring motor is connected with the magnetic driver device put in kettle
Connect, the upper end of magnetic driver device is connected with stirring motor, and the lower end of magnetic driver device is through shaft coupling and agitating shaft
It is connected, agitating shaft is provided with agitator, it is characterised in that described kettle is provided with outer quick temperature control mechanism, interior aids in temperature control
Mechanism and the rabbling mechanism that prevents adhesion, described outer quick temperature control mechanism are made up of electric furnace, the body of heater of described electric furnace
Inwall is in contact with the outer wall of reactor kettle, reaches quick temperature control effect, described interior aids in temperature control machine by electric furnace
Structure is made up of spiral coil, and described spiral coil is divided into top coil pipe, middle part coil pipe and bottom coil pipe, described top
Coil pipe is located at the top of reactor kettle, and the inlet tube of top coil pipe above kettle by putting in inside kettle and in kettle internal upper part
Spiral and then by stretching out above kettle, described middle part coil pipe is located at the middle part of reactor kettle, the inlet tube of middle part coil pipe by
Put in above kettle inside kettle and middle part is spiraled and then by being stretched out above kettle in kettle, described bottom coil pipe is positioned at anti-
Answer the bottom of kettle kettle, the inlet tube of bottom coil pipe by put in above kettle inside kettle and in kettle bottom spiral then by
Stretched out above kettle, described top coil pipe, middle part coil pipe and bottom coil pipe arranged in parallel pass through three parts disk inside kettle
Pipe realizes axial temperature control in kettle, and the described rabbling mechanism that prevents adhesion by helical blade, augering screw, lifting ribbon and is scraped
Wall stirring frame composition, described helical blade spiral on agitating shaft, and agitating shaft is provided with least three parallel augering screws,
The both ends of augering screw are each passed through in the middle part of the axle center of agitating shaft and are connected with lifting ribbon, described lifting ribbon and spiral
Blade is in reverse acting spiral state, lifts the upper end of ribbon and is connected with the augering screw of top, by spiral successively with lower section
Augering screw end, which is connected, to be finally fixed on agitating shaft, and described wall stirring frame of scraping is set to and reactor kettle inner side
The W types being engaged with bottom scrape wall stirring frame, and the middle part that described W types scrape wall stirring frame is connected with the lower end of agitating shaft, W types
Reactor inner wall of kettle adhesion thing is struck off in the lower end and both sides for scraping wall stirring frame with inconsistent realization inside reactor kettle respectively
Material.
The top of shaft coupling is provided with flushing device in reactor kettle of the present invention, and described flushing device is by rinsing
Pipe is formed, and the water inlet end of described flush pipe is located on the kettle of reactor, and one end of flush pipe is put in inside reactor kettle,
The other end spirals in the shape of a spiral in reactor kettle finally to be passed by the upper end of reactor kettle, and described puts in reactor kettle
It is provided with below internal flush pipe and rinses spout, the liquid sprayed by rinsing spout, which is realized, washes away washing away for kettle wall and coil pipe,
Prevent bridging from causing hot-spot.
Heat insulation layer is provided between the outside of magnetic driver device of the present invention and reactor kettle, is being ensured
While the sealing stability for operating mode of boosting, the heat exchange of transmission mechanism and temperature in the kettle environment is dramatically reduced,
Ensure minimum heat losses, ensure that the temperature constant state of inside is not broken by the external world.
The outer cover of shaft coupling of the present invention is equipped with closing housing, effectively avoids shaft coupling machined surface and company
The phenomenon of fitting bridging, it is integrally-built fully to coordinate, promote material to be sufficiently stirred in kettle.
Support bar, the middle part of support bar and agitating shaft are provided between W types two outer wall of the present invention for scraping wall stirring frame
It is connected, two outer walls that wall stirring frame is scraped at the both ends of support bar with W types respectively are connected, fixed to scrape wall stirring frame, and wall is scraped in increase
Stir the stability of mount structure.
The inner wall of kettle and spiral coil of reactor of the present invention all mirror-finish, and polishing degree is 0.2 μm, is had
The adhesion for preventing material of effect.
The present invention outer quick temperature control mechanism, interior aids in temperature control mechanism and the mixer that prevents adhesion because described kettle is provided with
Structure, the temperature-controllable in reactor course of reaction is realized, by making while outer quick temperature control mechanism and interior aids in temperature control mechanism
Lifted with the temperature accelerated in reactor, while the spiral coil in interior aids in temperature control mechanism directly improves with material heat-transfer effect
Internal temperature control precision, and independent operation is beneficial to using the segmental structure heat transfer of three parts, ensure axially warm in course of reaction
The flexible controllability of degree, increases reaction temperature stability with this, so as to improve product yield, the stirring combination in the mechanism that prevents adhesion
With fabulous heat transfer property, have simple in construction, simple in construction, easy cleaning, reaction temperature stablize it is easily-controllable, make beneficial to continuous
The advantages that industry, efficient high yield.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the section view of flush pipe in the present invention.
Embodiment
The present invention is further described below in conjunction with the accompanying drawings：
As shown in drawings, a kind of polyphenylene sulfide polymerization reaction kettle, including kettle 1, stirring motor 2, agitating shaft 3, agitator and magnetic
Couple of force closes driver 4, and the top of described kettle 1 is provided with stirring motor 2, and the output shaft of stirring motor 2 is with putting in kettle 1
Magnetic driver device 4 is connected, and the upper end of magnetic driver device 4 is connected with stirring motor 2, magnetic driver device 4
Lower end be connected through shaft coupling 5 with agitating shaft 3, agitating shaft 3 is provided with agitator, the structure of above-mentioned each part and they
Between interconnected relationship it is same as the prior art, this is not repeated, it is characterised in that described kettle 1 is provided with outer quick control
Warm mechanism, interior aids in temperature control mechanism and the rabbling mechanism that prevents adhesion, described outer quick temperature control mechanism are made up of electric furnace 6, institute
The inboard wall of furnace body for the electric furnace 6 stated is in contact with the outer wall of reactor kettle 1, and reaching quick temperature control by electric furnace 6 imitates
Fruit, described interior aids in temperature control mechanism are made up of spiral coil, and described spiral coil is divided into top coil pipe 7, middle part disk
Pipe 8 and bottom coil pipe 9, described top coil pipe 7 are located at the top of reactor kettle 1, and the inlet tube of top coil pipe 7 is by kettle 1
Top puts in the inside of kettle 1 and spirals in the internal upper part of kettle 1 and then be located at anti-by stretching above kettle 1, described middle part coil pipe 8
The middle part of kettle kettle 1 is answered, the inlet tube of middle part coil pipe 8 puts in the inside of kettle 1 by the top of kettle 1 and middle part is spiraled in kettle 1
Then stretched out by the top of kettle 1, described bottom coil pipe 9 is located at the bottom of reactor kettle 1, the inlet tube of bottom coil pipe 9 by
The top of kettle 1 puts in the inside of kettle 1 and bottom is spiraled and then by being stretched out above kettle 1 in kettle 1, described top coil pipe 7,
Middle part coil pipe 8 and the arranged in parallel of bottom coil pipe 9 realize axial temperature control in kettle inside kettle 1, by three parts coil pipe,
The described rabbling mechanism that prevents adhesion is by helical blade 10, augering screw 11, lifting ribbon 12 and scrapes wall stirring frame 13 and forms, described
Helical-blade 10 spiral on agitating shaft 3, agitating shaft 3 is provided with least three parallel augering screws 11, augering screw 11
Both ends be each passed through in the middle part of the axle center of agitating shaft 3 and be connected with lifting ribbon 12, described lifting ribbon 12 and helical-blade
Piece 10 is in reverse acting spiral state, and the upper end of lifting ribbon 12 is connected with the augering screw 11 of top, by spiral successively with
The end of augering screw 11 of side, which is connected, to be finally fixed on agitating shaft 3, and described wall stirring frame 13 of scraping is set to and reactor kettle
The W types that the inner side of body 1 and bottom are engaged scrape wall stirring frame 13, and described W types scrape middle part and the agitating shaft 3 of wall stirring frame 13
Lower end be connected, W types scrape the lower end of wall stirring frame 13 and both sides struck off respectively with the inconsistent realization in the inside of reactor kettle 1 it is anti-
Answer the inwall adhesion material of kettle kettle 1, the top of shaft coupling 5 is provided with flushing device in described reactor kettle 1, and described washes away
Device is made up of flush pipe 14, and the water inlet end of described flush pipe 14 is located on the kettle 1 of reactor, and one end of flush pipe 14 is stretched
Enter inside reactor kettle 1, the other end spirals in the shape of a spiral in reactor kettle 1 finally to be worn by the upper end of reactor kettle 1
Go out, the described lower section of flush pipe 14 put in reactor kettle 1, which is provided with, rinses spout 15, the liquid sprayed by rinsing spout 15
Body, which is realized, washes away washing away for kettle wall and coil pipe, prevents that bridging from causing hot-spot, the outside of described magnetic driver device 4 with
Heat insulation layer 16 is provided between reactor kettle 1, while the sealing stability of boosting operating mode is ensured, is dramatically dropped
The heat exchange of low transmission mechanism and temperature in the kettle environment, it is ensured that minimum heat losses, ensure the temperature constant state of inside not
Broken by the external world, the outer cover of described shaft coupling 5 is equipped with closing housing 17, effectively avoid the machined surface of shaft coupling 5 and
The phenomenon of connector bridging, it is integrally-built fully to coordinate, promote material to be sufficiently stirred in kettle, described scrapes wall stirring frame 13
The outer wall of W types two between be provided with support bar 18, the middle part of support bar 18 is connected with agitating shaft 3, the both ends of support bar 18 difference
Two outer walls that wall stirring frame 13 is scraped with W types are connected, fixed to scrape wall stirring frame 13, and the stabilization of the wall stirring structure of frame 13 is scraped in increase
Property, the inwall of kettle 1 and spiral coil of described reactor all mirror-finish, and polishing degree is 0.2 μm, is effectively prevented
The adhesion of material.
It is in the use of the present invention, first molten to a certain amount of 1-METHYLPYRROLIDONE (abbreviation NMP) of reactor addition before operation
Agent, the vulcanized sodium, sodium hydroxide and reaction promoter of metering are then added, pass through top coil pipe 7, middle part coil pipe under nitrogen protection
8 and bottom coil pipe 9 lead to steam and open the heat temperature raising of electric furnace 6, it is strong that electric furnace 6 possesses controllability, and the efficiency of heating surface is high
The advantages that, temperature in the kettle adds quantitative paracide and nmp solvent up to heating is stopped at 200 DEG C or so, in nitrogen displacement kettle
Pressurizeed after air heating, release big calorimetric in course of reaction, temperature rise, then to top coil pipe 7, middle part coil pipe 8 and lower disc
Lead to circulating water cooling in pipe 9, by controlling three sections of inflows to keep temperature in the kettle constant respectively, by magnetic driver device 4
Upper heat insulation layer 16 reduce heat losses, promote material using augering screw 11 and the immixture for scraping wall stirring frame 13
Sufficient polymerisation is carried out, because polymer viscosity is lifted rapidly, is passed through to rinse mouth and washes away nmp solvent, flusher rises
To the effect for washing away kettle wall and coil pipe, prevent that bridging from causing hot-spot, the closing housing 17 outside clamping coupling is effective
The phenomenon of shaft coupling machined surface and connector bridging is avoided, it is integrally-built fully to coordinate, promote material fully to be stirred in kettle
The advantages of mixing, and should reducing the continuous operation that wash number reaches, substantially increases equipment capacity and product yield.
The device of the present invention using electric furnace 6 due to being heated up the outside of reactor kettle 1, while improving heating efficiency
The effect of artificial quick temperature control is ensure that, inside is provided with the segmented of top coil pipe 7, middle part coil pipe 8 and the three parts of bottom coil pipe 9
Spiral coil aids in temperature control, can be by directly passing as cooling catalyst as heating catalyst, recirculated water by the use of water vapour with material
Thermal effect improves internal temperature control precision, and segmentation structure heat transfer is beneficial to independent operation, ensures axial direction temperature in course of reaction
The flexible controllability of degree, increases reaction temperature stability, so as to improve product yield with this；The outside of magnetic driver device 4
Provided with heat insulation layer 16, while the sealing stability of boosting operating mode is ensured, dramatically reduce transmission mechanism with
The heat exchange of temperature in the kettle environment, it is ensured that minimum heat losses, ensure that the temperature constant state of inside is not broken by the external world, kettle
1 inwall mirror-finishes, and polishing precision uses the sprayer unit of hydrodynamic analysis Software for Design can be most up to 0.2 μm
Wide-angle and quantity for spray cleaning reactor inside and internals, are effectively prevented the adhesion of material, and the outside of shaft coupling 5 is provided with closing
Housing 17, revolving structure is changed into from processing structure, reduces deformation structure bridging, coated surface of shell and other all internals pass through
Cross polishing；Finally, it is overall to use open separation structure, and manhole is set, it is easy to cleaning work in observation in time and kettle, adopts
Novel mixer combine, it is this stirring combination there is fabulous heat transfer property, due to provided with lifting ribbon 12 be spiral
Big blade shape, can be achieved discharge liquid to kettle wall distance reduction, the heat exchange of such agitated medium than more uniform,
The exchange rate of liquid and wall is faster than conventional agitator, by experimental verification, high viscosity reactor novel compositions agitator
Container internal membrane heat transfer coefficient can be significantly improved, is suitable for the heat transfer reaction of high viscosity medium, separately using this new group
Agitator is closed, agitator surface also passes through finishing polish processing, and screw rod, which advances downwardly effect, strengthens axial material mixed effect, scrapes wall
While stirring frame tangential material immixture is provided, the partial material that kettle wall is adhered is struck off, ensure internal comprehensive uniform
Flow regime.
The present invention outer quick temperature control mechanism, interior aids in temperature control mechanism and the mixer that prevents adhesion because described kettle is provided with
Structure, the temperature-controllable in reactor course of reaction is realized, by making while outer quick temperature control mechanism and interior aids in temperature control mechanism
Lifted with the temperature accelerated in reactor, while the spiral coil in interior aids in temperature control mechanism directly improves with material heat-transfer effect
Internal temperature control precision, and independent operation is beneficial to using the segmental structure heat transfer of three parts, ensure axially warm in course of reaction
The flexible controllability of degree, increases reaction temperature stability with this, so as to improve product yield, the stirring combination in the mechanism that prevents adhesion
With fabulous heat transfer property, have it is simple in construction, be easy to cleaning, working stability, reaction environment easily manipulate, are with short production cycle,
The advantages of efficient high production capacity etc. is notable, the advantages that disclosure satisfy that PPS industrialization, the requirement of continuous production.
Claims (6)
1. a kind of polyphenylene sulfide polymerization reaction kettle, including kettle, stirring motor, agitating shaft, agitator and magnetic driver device,
The top of described kettle is provided with stirring motor, and the output shaft of stirring motor is connected with the magnetic driver device put in kettle
Connect, the upper end of magnetic driver device is connected with stirring motor, and the lower end of magnetic driver device is through shaft coupling and agitating shaft
It is connected, agitating shaft is provided with agitator, it is characterised in that described kettle is provided with outer quick temperature control mechanism, interior aids in temperature control
Mechanism and the rabbling mechanism that prevents adhesion, described outer quick temperature control mechanism are made up of electric furnace, the body of heater of described electric furnace
Inwall is in contact with the outer wall of reactor kettle, reaches quick temperature control effect, described interior aids in temperature control machine by electric furnace
Structure is made up of spiral coil, and described spiral coil is divided into top coil pipe, middle part coil pipe and bottom coil pipe, described top
Coil pipe is located at the top of reactor kettle, and the inlet tube of top coil pipe above kettle by putting in inside kettle and in kettle internal upper part
Spiral and then by stretching out above kettle, described middle part coil pipe is located at the middle part of reactor kettle, the inlet tube of middle part coil pipe by
Put in above kettle inside kettle and middle part is spiraled and then by being stretched out above kettle in kettle, described bottom coil pipe is positioned at anti-
Answer the bottom of kettle kettle, the inlet tube of bottom coil pipe by put in above kettle inside kettle and in kettle bottom spiral then by
Stretched out above kettle, described top coil pipe, middle part coil pipe and bottom coil pipe arranged in parallel pass through three parts disk inside kettle
Pipe realizes axial temperature control in kettle, and the described rabbling mechanism that prevents adhesion by helical blade, augering screw, lifting ribbon and is scraped
Wall stirring frame composition, described helical blade spiral on agitating shaft, and agitating shaft is provided with least three parallel augering screws,
The both ends of augering screw are each passed through in the middle part of the axle center of agitating shaft and are connected with lifting ribbon, described lifting ribbon and spiral
Blade is in reverse acting spiral state, lifts the upper end of ribbon and is connected with the augering screw of top, by spiral successively with lower section
Augering screw end, which is connected, to be finally fixed on agitating shaft, and described wall stirring frame of scraping is set to and reactor kettle inner side
The W types being engaged with bottom scrape wall stirring frame, and the middle part that described W types scrape wall stirring frame is connected with the lower end of agitating shaft, W types
Reactor inner wall of kettle adhesion thing is struck off in the lower end and both sides for scraping wall stirring frame with inconsistent realization inside reactor kettle respectively
Material.
2. a kind of polyphenylene sulfide polymerization reaction kettle according to claim 1, it is characterised in that in described reactor kettle
The top of shaft coupling is provided with flushing device, and described flushing device is made up of flush pipe, and the water inlet end of described flush pipe is located at
On the kettle of reactor, one end of flush pipe is put in inside reactor kettle, other end disk in the shape of a spiral in reactor kettle
Rotation is finally passed by the upper end of reactor kettle, is provided with below the described flush pipe put in reactor kettle and is rinsed spout,
The liquid sprayed by rinsing spout, which is realized, washes away washing away for kettle wall and coil pipe.
A kind of 3. polyphenylene sulfide polymerization reaction kettle according to claim 1, it is characterised in that described magnetic driver
Heat insulation layer is provided between the outside of device and reactor kettle.
A kind of 4. polyphenylene sulfide polymerization reaction kettle according to claim 1, it is characterised in that the outside of described shaft coupling
Set is equipped with closing housing.
A kind of 5. polyphenylene sulfide polymerization reaction kettle according to claim 1, it is characterised in that the described W for scraping wall stirring frame
Support bar is provided between the outer wall of type two, the middle part of support bar is connected with agitating shaft, and the both ends of support bar are scraped wall with W types respectively and stirred
Two outer walls for mixing frame are connected.
A kind of 6. polyphenylene sulfide polymerization reaction kettle according to claim 1, it is characterised in that the kettle of described reactor
Inwall and spiral coil all mirror-finish, and polishing degree is 0.2 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711099823.4A CN107570086A (en) | 2017-11-09 | 2017-11-09 | A kind of polyphenylene sulfide polymerization reaction kettle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711099823.4A CN107570086A (en) | 2017-11-09 | 2017-11-09 | A kind of polyphenylene sulfide polymerization reaction kettle |
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| Publication Number | Publication Date |
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| CN107570086A true CN107570086A (en) | 2018-01-12 |
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| CN201711099823.4A Pending CN107570086A (en) | 2017-11-09 | 2017-11-09 | A kind of polyphenylene sulfide polymerization reaction kettle |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108714403A (en) * | 2018-06-27 | 2018-10-30 | 南京安伦化工科技有限公司 | 2- (3,5- bis--trifluoromethyl) -2 Methylpropionic acid reaction kettle |
| CN110038491A (en) * | 2019-05-20 | 2019-07-23 | 武汉有机实业有限公司 | It is bubbled tower apparatus and its method for liquid-phase oxidation of toluene production benzoic acid |
| CN110760323A (en) * | 2019-09-24 | 2020-02-07 | 中国石油天然气集团有限公司 | Magnetic coupling seal transmission structure and thermal reaction furnace |
| CN113546587A (en) * | 2021-07-13 | 2021-10-26 | 江苏瑞亚搅拌科技有限公司 | High-efficient polymeric kettle mixer |
| CN116196872A (en) * | 2023-04-04 | 2023-06-02 | 江西德盛精细化学品有限公司 | Environment-friendly color fixing agent preparation device and method |
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| CN108714403A (en) * | 2018-06-27 | 2018-10-30 | 南京安伦化工科技有限公司 | 2- (3,5- bis--trifluoromethyl) -2 Methylpropionic acid reaction kettle |
| CN110038491A (en) * | 2019-05-20 | 2019-07-23 | 武汉有机实业有限公司 | It is bubbled tower apparatus and its method for liquid-phase oxidation of toluene production benzoic acid |
| CN110760323A (en) * | 2019-09-24 | 2020-02-07 | 中国石油天然气集团有限公司 | Magnetic coupling seal transmission structure and thermal reaction furnace |
| CN113546587A (en) * | 2021-07-13 | 2021-10-26 | 江苏瑞亚搅拌科技有限公司 | High-efficient polymeric kettle mixer |
| CN116196872A (en) * | 2023-04-04 | 2023-06-02 | 江西德盛精细化学品有限公司 | Environment-friendly color fixing agent preparation device and method |
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