CN208742574U - A kind of reactor preparing cyanuric acid - Google Patents
A kind of reactor preparing cyanuric acid Download PDFInfo
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- CN208742574U CN208742574U CN201820804081.4U CN201820804081U CN208742574U CN 208742574 U CN208742574 U CN 208742574U CN 201820804081 U CN201820804081 U CN 201820804081U CN 208742574 U CN208742574 U CN 208742574U
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- cyanuric acid
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- connecting shaft
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Abstract
The utility model discloses a kind of reactor for preparing cyanuric acid, including reactor tank, it is provided with agitating device in reactor tank, agitating device passes through motor driven；The agitating device includes connecting shaft, and the upper end of connecting shaft is connected to motor, and connecting shaft is respectively arranged with double ribbon impellers, paddle agitating paddle and bottom agitating paddle from top to bottom.By this agitating device, the urea being added in reactor can be mixed quickly, and energy distribution is more uniform in reactor, heat transfer is strong, and can solve reaction mass the problem of reactor wall agglomerates, the generation of side reaction is reduced, the cyanuric acid product of high yield, high-purity is obtained.
Description
Technical field
The utility model relates to reactor field, specially a kind of reactor for preparing cyanuric acid.
Background technique
Cyanuric acid is a kind of important organic intermediate, can synthesize hundreds of important fine chemistries using it as raw material
Product share four major class, twenties kinds, about 500 products.Wherein the overwhelming majority produces for the fine chemistry industry with specific use
Product, for numerous areas such as pesticide, medicine, dyestuff, material and auxiliary agents.
Cyanuric acid is a kind of potential NO_x Reduction by Effective reagent again.American scientist is reported on nature within 1986, three
Paracyanogen acid has very high denitration efficiency, and cardinal principle is that cyanuric acid at 330 DEG C or more is decomposed into isocyanic acid, the latter and nitrogen
Oxygen compound effect generates carbon monoxide, carbon dioxide and water and fails large-scale industry in view of cyanuric acid higher cost at that time
Change application.
Currently, the industrial production of cyanuric acid generally all takes urea pyrolysis method, main packet is divided according to reaction medium
Include direct pyrolysis method, fused salt pyrolysismethod and solvent pyrolysismethod.Direct pyrolysis method is usually in the reaction for having paddle agitating device
It is carried out in device, equipment is simple, but liquid phase is easy to adherency on the reactor wall during Urea, heat transfer difficult and ammonia is not easy
It escapes, the excessively high by-product and amine derivant that can generate condensation of temperature at nearly wall causes cyanuric acid yield low, purity is not
It is high.
For problem of the prior art, it is necessary to design a kind of reactor, solve cyanuric acid and be easy during the preparation process
The problem of being adhered to reactor.
Utility model content
Aiming at the problems existing in the prior art, the utility model offer prepares the reactor of cyanuric acid, the reactor
It is adjustably adjusted with one, combined agitating device, solves material in reaction process and glue wall, heat transfer difficult, by-product
More problems realizes the efficient production of cyanuric acid.
The utility model is to be achieved through the following technical solutions:
A kind of reactor preparing cyanuric acid, which is characterized in that including reactor tank, stirring dress is provided in reactor tank
It sets, agitating device passes through motor driven；
The agitating device includes connecting shaft, and the upper end of connecting shaft is connected to motor, and connecting shaft is respectively set from top to bottom
There are double ribbon impellers, paddle agitating paddle and bottom agitating paddle, double ribbon impellers are for preventing material and reactor tank side
Wall bonding, bottom agitating paddle is for preventing material and reactor tank bottom adhesive.
Preferably, the reactor tank side is additionally provided with ammonia outlet, and pressure vacuum gauge is equipped in ammonia outlet, and ammonia goes out
Mouth is controlled to a vacuum pump.
Preferably, the ratio of the diameter of double ribbon impellers and reactor tank diameter is (0.95- 0.98): 1, double spiral shells
The ratio of the diameter of the screw pitch of ribbon blender paddle and double ribbon impellers is (0.151-121): 1, double ribbon impellers
The ratio of height and the height of reactor tank is 0.4-0.5): 1.
Preferably, the ribbon of double ribbon impellers is banded structure.
Preferably, the ratio of the diameter of the paddle agitating paddle and reactor tank diameter is (0.75-0.8): 1.
Preferably, the bottom agitating paddle is arranged in the lower end of connecting shaft, bottom axis projection curve and reactor tank
Bottom section is identical, and the diameter of bottom agitating paddle and the ratio of reactor tank diameter are (0.95- 0.98): 1.
Preferably, the connecting shaft is stretching structure, including fixed link, motion bar and locking fixture；Fixed link it is upper
End is connected to motor at the top of reactor tank, and motion bar is mounted in fixed link and can move axially, and locking fixture is used
It is positioned in the length to connecting shaft.
Preferably, locking fixture includes fixing sleeve and positioning bolt, and fixing sleeve is mounted on the lower end of fixed link, positions spiral shell
Bolt is horizontally arranged on fixing sleeve, and the end of positioning bolt, which can be withstood on the side wall of motion bar, positions it.
Preferably, the locking fixture includes fixing sleeve and is locked to set, and the fixing sleeve is mounted on the lower end of fixed link,
It is provided with external screw thread on fixing sleeve, there are multiple dilatation joints screw position is axially disposed；It is locked to set to be mounted on motion bar, lock
The internal screw thread that external screw thread matches is internally provided with to set.
Preferably, the thermally conductive oil lagging for heating to material is provided in the reactor tank, thermally conductive oil lagging upper end is set
It is equipped with heat conducting oil inlet, lower end is provided with conduction oil outlet.
Compared with prior art, the utility model has technical effect beneficial below:
This prepares the reactor of cyanuric acid, comprising vertical vessel and an axially mounted agitating device in a reservoir,
The agitating device is located at reactor tank lower position by the double ribbon impellers to be spiraled on agitating shaft from top to bottom, one
Paddle agitating paddle, one be located at reaction pot bottom agitating paddle composition.Double ribbon impellers rely near wall Strong shear
And axial main body convection circulation, efficiently material can be mixed, since the diameter of propeller blade is larger, can play the role of scraping wall, have
Effect prevents the bonding of wall surface material and reactor tank heat transfer property from deteriorating；Paddle agitating paddle makes material generate axial flowing, prevents
Solid precipitation；The agitating paddle of reaction pot bottom plays the role of scraping bottom, prevents the bonding of solid precipitation and bottoms material.
By this agitating device, the urea being added in reactor tank can be mixed quickly, energy consumption point in reactor tank
Cloth is more uniform, and heat transfer is strong, and can solve reaction mass the problem of reacting top tank structure agglomeration, reduces the generation of side reaction, obtains
To the cyanuric acid product of high yield, high-purity.
The length of connecting shaft is adjusted by locking fixture, agitating paddle can be adjusted to most suitable height.
Reaction tank wall ammonia outlet is controlled to a vacuum pump, the ammonia for generating during abstraction reaction, is conducive to anti-
Positive generation is answered, exit is equipped with pressure vacuum gauge, for monitoring the vacuum degree of reaction system.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of reactor.
In figure: 1- reactor tank, 2- agitating device, 3- fixed link, 4- motion bar, the bis- ribbon impellers of 8-, 9- lower layer stirs
Mix paddle, the bottom 10- agitating paddle, 11- feed inlet, 12- discharge port, the thermally conductive oil lagging of 13-, 14- conduction oil outlet, 15- conduction oil
Entrance, 16- thermocouple, 17- ammonia outlet, 18- pressure vacuum gauge, 19- motor.
Specific embodiment
The following describes the utility model in further detail with reference to the accompanying drawings, it is described be the explanation to the utility model and
It is not to limit.
A kind of reactor preparing cyanuric acid, including reactor tank 1, agitating device 2, thermally conductive oil lagging 13 and motor 19.
Wherein, the agitating device 2 is mounted in reactor tank 1, the upper end of agitating device 2 pass through the top of reactor tank 1 with
Motor 19 connect, motor 19 drive agitating device rotated, the outside of reactor tank 1 is arranged in thermally conductive oil lagging 13, for pair
Reactor tank 1 is heated, and thermally conductive oil lagging lower end is provided with conduction oil outlet 14, and promising heat conducting oil inlet 15 is arranged in upper end.Instead
The upper end of tank 1 is answered to be equipped with reaction raw materials feed inlet, lower end is equipped with reaction product discharge port.Reactor tank side is additionally provided with ammonia outlet
17, pressure vacuum gauge 18 is installed in ammonia outlet.Reactor tank 1 is equipped with thermocouple 16, for the temperature in monitoring reaction course
Degree.
Agitating device 2 includes connecting shaft, and the double ribbon impellers, 9 and of lower layer's agitating paddle that are arranged in connecting shaft
Bottom agitating paddle 10.
The top that the upper end of connecting shaft passes through reactor tank 1 is connect with motor, and double ribbon impellers spiral from top to bottom
The top of connecting shaft is set, and lower layer's agitating paddle 9 is arranged in the lower part of connecting shaft and is located at the bottom of double ribbon impellers, bottom
The lower end of connecting shaft is arranged in portion's agitating paddle 10.
The ribbon of double ribbon impellers is the hurricane band that banded plate is constituted, the diameter X of double ribbon impellers
Be X:D=0.95-0.98:1 with the ratio of reactor tank diameter D, the screw pitch Y of double ribbon impellers and ribbon impeller it is straight
The ratio of diameter X is Y:X=0.5-2:1, and the ratio of the height H of the height h and reactor tank of double ribbon impellers is h:H=0.4-
0.5:1。
Double ribbon impellers rely near wall Strong shear and axial main body convection circulation, can efficiently mix to material
It closes, since the diameter of propeller blade is larger, can play the role of scraping wall, effectively prevent the bonding and reactor tank heat transfer property of wall surface material
Deteriorate.
Lower layer's agitating paddle is paddle agitating paddle, there is 2 paddles, the ratio of the diameter M and reactor tank diameter D of paddle agitating paddle
Example is M:D=0.75-0.8:1, and paddle agitating paddle makes material generate axial flowing, prevents solid precipitation, and material mixing is more equal
It is even.
Bottom agitating paddle is fixed on the bottom end of No. two bars.The ratio of the diameter N and reactor tank diameter D of bottom agitating paddle is
N:D=0.95-0.98:1, bottom agitating paddle play the role of scraping bottom, prevent the bonding of solid precipitation and bottoms material, generate simultaneously
One mixing power from bottom to top further promotes material to mix more uniform.
Connecting shaft is retractable structure, including fixed link 3, motion bar 4 and adjusting lock, the upper end of fixed link 3 and motor
19 connections, motion bar 4 are sleeved in fixed link 3 and can move up and down, and the lower end of fixed link 3 is provided with adjusting lock, adjust lock
It locks for the length to connecting shaft, by adjusting the length of connecting shaft, agitating device can be adjusted to most suitable height
Degree.
Adjusting lock includes lock tube and positioning bolt, and lock tube is sleeved on the lower end of fixed link 3, and positioning bolt and lock tube pass through spiral shell
Line horizontal connection, by rotational positioning bolt, its end is withstood on the outer wall of motion bar 4, is positioned to connecting shaft.
Adjusting lock can also be expansion sleeve, including fixing sleeve and be locked to set, and the fixing sleeve is mounted on the lower end of fixed link,
The inclined-plane of the bottom side of the wall of fixing sleeve is provided with screw thread on inclined-plane, and inclined-plane, which further averages, is provided with 3 vertical dilatation joints；It is locked to
Set is mounted on motion bar 4, is locked to set and is internally provided with screw thread, and being locked to set by rotation makes dilatation joint diminution that activity can be realized
The direction of rotation of the locking of bar 4 and fixed link 3, the locking rotation direction and agitating device that are locked to set is led to.
The process for preparing cyanuric acid using reaction is explained in detail below.
Cyanuric acid is prepared using urea direct pyrolysis method, specific embodiment includes charging, reaction, purification.
Charging: after confirming that all valves are closed, feed inlet 11 is opened, technical grade urea, additional amount are added in reactor tank 1
No more than the 2/3 of reactor tank volume, feed inlet is closed.
Reaction: connecting motor power, and control mixing speed opens Heat-conduction oil circulation system, setting in 400-500r/min
It 220 DEG C of temperature, starts to warm up.Urea mixed at high speed under the drive of agitating device is increased to 130 DEG C or more to reaction temperature
When, reaction system begins to change into molten state, while having ammonia releasing, opens vacuum pump at this time, releases during absorbing reaction
Ammonia controls the aperture of vacuum pump to adjust the vacuum degree of reaction system, guarantees the reading of pressure vacuum gauge in entire reaction process
Number maintains 0-0.05Mpa, and ammonia is by phosphoric acid solution and absorbing.When reaction temperature reaches 160 DEG C, entire reaction system becomes
The liquid of clear has a large amount of ammonia to release, and temperature reaches 190 DEG C, and reaction system gradually becomes cloudy, and has a small amount of solid to analyse
Out, with the further raising of reaction temperature, solid material is constantly precipitated, when end temperature reaches 220 DEG C, entire reaction system
Become sticky solid.Dual impellers agitating device relies near wall Strong shear and axial main body convection circulation, can be viscous to solid
Thick material is efficiently mixed, and can be played the role of scraping wall and be scraped bottom, effectively prevent bonding and solid precipitation, and can reduce
The generation of side reaction.At a temperature of 220 DEG C, reaction system 20min is continued to, closes heat-conducting oil heating system, ammonia absorbs dress
It sets, motor, reaction was completed.
Purification: when temperature drops to 80 DEG C or less, the sulfuric acid solution that feed inlet is added 20% in reaction system is opened, is connect
Energization electromechanical source, control mixing speed open Heat-conduction oil circulation system in 200-300r/min, control 90 DEG C of temperature, open out
Port does not need to be extracted with vacuum pump at this time for discharging steam.After 20% sulfuric acid solution 20min, close thermally conductive
Heating system for oil, motor open lower discharge port when temperature drops to room temperature, filter, and wash, dry, obtain cyanuric acid production
Product, yield are greater than 85%, and purity is greater than 99%.
The utility model has the beneficial effects that: the utility model provides a kind of novel reactor, which is had
One telescopically adjustable, combined agitating device, for urea, efficiently condensation prepares cyanuric acid, stirs with common paddle
The reactor for mixing device is compared, which solves in reaction process material and glue wall, heat transfer difficult, the problem more than by-product,
After reaction after post treatment, cyanuric acid yield is greater than 85%, and purity is greater than 99%.
The above content is only to illustrate the technical idea of the utility model, and the protection model of the utility model cannot be limited with this
Enclose, it is all according to the utility model proposes technical idea, any changes made on the basis of the technical scheme each falls within this reality
Within protection scope with novel claims.
Claims (10)
1. a kind of reactor for preparing cyanuric acid, which is characterized in that including reactor tank (1), reactor tank is provided with stirring in (1)
Device (2), agitating device are driven by motor (19)；
The agitating device (2) includes connecting shaft, and the upper end of connecting shaft is connect with motor (19), and connecting shaft is set respectively from top to bottom
It is equipped with double ribbon impellers, paddle agitating paddle and bottom agitating paddle, double ribbon impellers are for preventing material and reactor tank
(1) side wall bonds, and bottom agitating paddle is for preventing material and reactor tank (1) bottom adhesive.
2. a kind of reactor for preparing cyanuric acid according to claim 1, which is characterized in that reactor tank (1) side
It is additionally provided with ammonia outlet (17), is equipped in ammonia outlet pressure vacuum gauge (18), ammonia outlet (17) is controlled to a vacuum pump.
3. a kind of reactor for preparing cyanuric acid according to claim 1, which is characterized in that double ribbon impellers
Diameter and the ratio of reactor tank diameter be (0.95-0.98): 1, the screw pitch of double ribbon impellers and double ribbon impellers
The ratio of diameter is (0.151-121): 1, the ratio of the height of the height and reactor tank of double ribbon impellers is (0.4-0.5):
1。
4. a kind of reactor for preparing cyanuric acid according to claim 1, which is characterized in that double ribbon impellers
Ribbon be banded structure.
5. a kind of reactor for preparing cyanuric acid according to claim 1, which is characterized in that the paddle agitating paddle it is straight
The ratio of diameter and reactor tank diameter is (0.75-0.8): 1.
6. a kind of reactor for preparing cyanuric acid according to claim 1, which is characterized in that the bottom agitating paddle setting
In the lower end of connecting shaft, bottom axis projection curve is identical as the bottom section of reactor tank (1), the diameter of bottom agitating paddle with
The ratio of reactor tank diameter is (0.95-0.98): 1.
7. a kind of reactor for preparing cyanuric acid according to claim 1, which is characterized in that the connecting shaft is flexible knot
Structure, including fixed link (3), motion bar (4) and locking fixture；The upper end of fixed link passes through top and the motor of reactor tank (1)
(19) connect, motion bar (4) is mounted in fixed link and can move axially, locking fixture be used for the length of connecting shaft into
Row positioning.
8. a kind of reactor for preparing cyanuric acid according to claim 7, which is characterized in that locking fixture includes fixing
Set and positioning bolt, fixing sleeve are mounted on the lower end of fixed link (3), and positioning bolt is horizontally arranged on fixing sleeve, positioning bolt
End can withstand on the side walls of motion bar (4) it is positioned.
9. a kind of reactor for preparing cyanuric acid according to claim 7, which is characterized in that the locking fixture includes
Fixing sleeve and it is locked to set, the fixing sleeve is mounted on the lower end of fixed link, is provided with external screw thread on fixing sleeve, on screw position edge
Axially it is provided with multiple dilatation joints；Set is locked to be mounted on motion bar (4), be locked to set be internally provided with external screw thread match it is interior
Screw thread.
10. a kind of reactor for preparing cyanuric acid according to claim 1, which is characterized in that set on the reactor tank (1)
It is equipped with the thermally conductive oil lagging (13) for heating to material, thermally conductive oil lagging (13) upper end is provided with heat conducting oil inlet (15), under
End is provided with conduction oil outlet (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820804081.4U CN208742574U (en) | 2018-05-28 | 2018-05-28 | A kind of reactor preparing cyanuric acid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820804081.4U CN208742574U (en) | 2018-05-28 | 2018-05-28 | A kind of reactor preparing cyanuric acid |
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| Publication Number | Publication Date |
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| CN208742574U true CN208742574U (en) | 2019-04-16 |
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ID=66053548
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820804081.4U Active CN208742574U (en) | 2018-05-28 | 2018-05-28 | A kind of reactor preparing cyanuric acid |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111018798A (en) * | 2019-12-31 | 2020-04-17 | 河北六合化工有限公司 | Pyrolysis method for cyanuric acid production |
| CN113237043A (en) * | 2021-05-18 | 2021-08-10 | 中煤科工集团重庆研究院有限公司 | Device for transforming thermal power station by utilizing fused salt energy storage |
| CN113600115A (en) * | 2021-08-14 | 2021-11-05 | 河南大化环保材料有限公司 | Cyanuric acid production device and production method |
-
2018
- 2018-05-28 CN CN201820804081.4U patent/CN208742574U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111018798A (en) * | 2019-12-31 | 2020-04-17 | 河北六合化工有限公司 | Pyrolysis method for cyanuric acid production |
| CN111018798B (en) * | 2019-12-31 | 2023-03-28 | 河北六合化工有限公司 | Pyrolysis method for cyanuric acid production |
| CN113237043A (en) * | 2021-05-18 | 2021-08-10 | 中煤科工集团重庆研究院有限公司 | Device for transforming thermal power station by utilizing fused salt energy storage |
| CN113600115A (en) * | 2021-08-14 | 2021-11-05 | 河南大化环保材料有限公司 | Cyanuric acid production device and production method |
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