CN217410782U - Supercritical reaction kettle suitable for producing nano hydrotalcite - Google Patents
Supercritical reaction kettle suitable for producing nano hydrotalcite Download PDFInfo
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- CN217410782U CN217410782U CN202221507819.3U CN202221507819U CN217410782U CN 217410782 U CN217410782 U CN 217410782U CN 202221507819 U CN202221507819 U CN 202221507819U CN 217410782 U CN217410782 U CN 217410782U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids
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Abstract
The utility model relates to a supercritical reaction cauldron suitable for production nanometer hydrotalcite. Comprises a kettle body, a stirring device, a gas distribution device and a dosing device; a heat-conducting oil coil is arranged on the outer wall of the kettle body, and a cooling water coil is arranged in the kettle body; the top of the kettle body is provided with a liquid feeding hole, a gas feeding hole and an exhaust hole, and the bottom of the kettle body is provided with a discharge hole; the stirring device comprises a stirring shaft, a driving device is arranged above the stirring shaft, and stirring blades are arranged below the stirring shaft; the gas distribution device is positioned below the stirring blades and comprises a gas guide pipe and a distribution ring, the gas guide pipe is connected to the gas feed inlet, and the distribution ring is provided with gas distribution holes; the dosing device comprises a medicament storage tank, a pressurization tank is arranged below the medicament storage tank, and the pressurization tank is connected to the gas feed port. The utility model discloses a gas distribution device and charge device both had satisfied the rapid change of hydrotalcite growth in-process pressure and temperature, and is even with carbon dioxide gas and modifier fast dispersion again, acts on the crystal surface effectively, realizes the controllable growth of crystal.
Description
Technical Field
The utility model relates to a supercritical reaction cauldron suitable for production nanometer hydrotalcite belongs to supercritical reaction cauldron technical field.
Background
Magnesium aluminum carbonate type hydrotalcite has been widely used as an antacid, a neutralizer of ziegler-natta residues of polyolefin resins, and a stabilizer of chlorinated resins in the prior art, and its dispersibility in polymers, heat aging resistance, and coloring properties are directly affected by parameters such as crystal grain size, aspect ratio, and specific surface area. The traditional hydrotalcite synthesis process is mainly a coprecipitation process or a hydrothermal synthesis process, more byproducts are often generated, a clean synthesis process is especially important along with the improvement of environmental protection requirements, the supercritical carbon dioxide synthesis technology is a green synthesis technology for preparing nano powder, and supercritical carbon dioxide fluid has liquid-like fluidity and gas penetration characteristic, so that an adsorption layer and a diffusion layer can be effectively prevented from being formed in the crystal growth process, and nano particles with controllable crystal forms can be prepared.
The supercritical carbon dioxide is generally used in the technical field of extraction, does not participate in reaction, is less applied in the field of hydrotalcite, and can change pressure and temperature rapidly when the supercritical technology is adopted to prepare nano hydrotalcite. And the hydrotalcite belongs to inorganic nano particles, and is applied to an organic polymer system to be organically modified, the addition amount of a modifier is very small, the hydrotalcite is not easy to disperse uniformly, and the structure of a reaction kettle plays a crucial role in the growth of hydrotalcite grains, so that the development of a supercritical reaction kettle suitable for producing nano hydrotalcite is very important.
SUMMERY OF THE UTILITY MODEL
To the deficiency of the prior art, the utility model provides a supercritical reaction cauldron suitable for production nanometer hydrotalcite. It can meet the requirement of fast change of pressure and temperature in the growth process of hydrotalcite crystal grain and disperse the modifier fast and homogeneously.
The technical scheme of the utility model as follows:
a supercritical reaction kettle suitable for producing nano hydrotalcite comprises a kettle body, a stirring device extending into the kettle body, a gas distribution device positioned in the kettle body and a dosing device arranged on the side surface of the kettle body;
a heat-conducting oil coil is arranged on the outer wall of the kettle body, and a cooling water coil is arranged in the kettle body; the top of the kettle body is provided with a liquid feeding hole, a gas feeding hole and an exhaust hole, and the bottom of the kettle body is provided with a discharge hole;
the stirring device comprises a stirring shaft extending into the kettle body, a driving device is arranged above the stirring shaft, and stirring blades are arranged below the stirring shaft;
the gas distribution device is positioned below the stirring blades and comprises a gas guide pipe and a distribution ring, the gas guide pipe is connected to the gas feed inlet, and the distribution ring is provided with gas distribution holes;
the dosing device comprises a medicament storage tank, a pressurization tank is arranged below the medicament storage tank, and the pressurization tank is connected to the gas feeding port.
According to the utility model discloses preferentially, the conduction oil coil pipe includes conduction oil import and conduction oil export, and conduction oil import and conduction oil export all set up on cauldron external wall, be provided with the solenoid valve in the conduction oil import, and the position of conduction oil import is less than the conduction oil export for advance under the conduction oil and go up out.
According to the utility model discloses it is preferred, the conduction oil coil pipe outside still is provided with the heat preservation. The material of heat preservation is the heat preservation cotton.
According to the utility model discloses preferred, the cooling water coil pipe includes cooling water inlet and cooling water outlet, and the cauldron body is all stretched out in cooling water inlet and cooling water outlet, and the position of cooling water inlet is higher than the cooling water outlet for the cooling is advanced under the water and is gone up out.
According to the utility model discloses it is preferred, liquid feed inlet, gas vent and discharge gate all are equipped with tight ring, are equipped with hold-down flange in the tight ring, guarantee that the cauldron body has good seal.
According to the utility model discloses preferred, motor, outer magnet, interior magnet and outer magnet card have set gradually from top to bottom to drive arrangement; the stirring blades are hinge paddle type stirring blades, and 2 groups are arranged in total.
According to the utility model discloses it is preferred, gaseous distribution device below still is provided with the dispersion impeller, and the dispersion impeller is fixed on the (mixing) shaft, the dispersion impeller below is provided with positioning channel section, and the (mixing) shaft passes through the shaft coupling with positioning channel section and links to each other. The utility model discloses a positioning channel section fixes the (mixing) shaft in cauldron body bottom.
According to the utility model discloses preferred, the distribution ring is fixed on the cauldron body, the gas distribution hole is bell jar formula gas distribution hole, and evenly distributed is on the distribution ring.
According to the utility model, the medicament storage tank and the pressurizing tank are preferably connected through a pipeline, and a communicating valve is arranged on the pipeline; the medicament storage tank side is provided with the level gauge, the overhead tank portion is provided with the blow-down pipe, and the side sets up the intake pipe, is provided with vortex flowmeter in the intake pipe.
According to the utility model, the supercritical reaction kettle is preferably provided with a temperature control system and a pressure control system; the temperature control system comprises a temperature measuring probe extending out of the side wall of the kettle body, the output end of the temperature measuring probe is electrically connected with the input end of a temperature controller, and the output end of the temperature controller is electrically connected with the input end of a heat-conducting oil inlet electromagnetic valve, so that the temperature of the reaction kettle is controlled;
the pressure control system comprises a safety valve positioned at the top of the kettle body, a pressure detector is arranged on the safety valve, and the signal output end of the pressure detector is electrically connected with the vortex shedding flowmeter, so that the pressure of the reaction kettle is controlled.
According to the utility model discloses it is preferred, the right side of the cauldron body still is provided with the access hole.
The present invention, which is not exhaustive, can adopt the prior art.
The beneficial effects of the utility model reside in that:
1. the utility model provides a supercritical reaction cauldron suitable for production nanometer hydrotalcite through setting up gas distribution device and charge device for it can satisfy the rapid change of hydrotalcite crystalline grain growth in-process pressure and temperature, can be even with carbon dioxide gas and modifier fast dispersion again, acts on the crystal surface fast effectively, realizes the controllable growth of crystal.
2. The utility model discloses a supercritical reaction cauldron suitable for production nanometer hydrotalcite makes the interior liquid medium of cauldron stir thoroughly evenly through stirring vane and dispersion impeller under supercritical high-pressure state, makes more abundant of material reaction, has accelerated the reaction rate of material promptly, lets the even growth of interior crystal nucleus of cauldron again.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is an enlarged detail view of the distribution ring.
In the figure: 1-kettle body; 2-heat conducting oil coil pipe, 3-cooling water coil pipe, 4-heat insulating layer, 5-stirring blade, 6-dispersion plate, 7-motor, 8-external magnet, 9-internal magnet, 10-positioning clamping groove, 11-stirring shaft, 12-air distribution hole, 13-distribution ring, 14-pressure tank, 15-vent pipe, 16-liquid level meter, 17-medicament storage tank, 18-vortex street flowmeter, 19-safety valve, 20-air exhaust hole, 21-maintenance hole, 22-temperature measuring probe, 23-liquid feed inlet, 24-discharge hole, 25-gas feed inlet, 26-heat conducting oil inlet, 27-heat conducting oil outlet, 28-cooling water inlet, 29-cooling water outlet, 30-air guide pipe, 31-external magnet card, 32-inlet pipe, 33-communicating valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
As shown in figures 1-2, a supercritical reaction kettle suitable for producing nano hydrotalcite comprises a kettle body 1, a stirring device extending into the kettle body 1, a gas distribution device positioned in the kettle body 1, and a dosing device arranged on the side surface of the kettle body 1.
The kettle body 1 is cylindrical, the design pressure is 12MPa, a heat conduction oil coil 2 is arranged on the outer wall of the kettle body 1, and a cooling water coil 3 is arranged inside the kettle body 1; the top of the kettle body 1 is provided with a liquid feeding hole 23, a gas feeding hole 25 and an exhaust port 20, and the bottom is provided with a discharge hole 24. The conduction oil coil 2 comprises a conduction oil inlet 26 and a conduction oil outlet 27, the conduction oil inlet 26 and the conduction oil outlet 27 are both arranged on the outer wall of the kettle body 1, an electromagnetic valve is arranged in the conduction oil inlet 26, and the position of the conduction oil inlet 26 is lower than that of the conduction oil outlet 27, so that the conduction oil can enter and exit from the bottom. The outer side of the heat conduction oil coil 2 is also provided with a heat insulation layer 4, and the heat insulation layer 4 is made of heat insulation cotton. The cooling water coil 3 comprises a cooling water inlet 28 and a cooling water outlet 29, the cooling water inlet 27 and the cooling water outlet 29 both extend out of the kettle body 1, and the position of the cooling water inlet 28 is higher than that of the cooling water outlet 29, so that the cooling water enters and goes out. Connectors such as the liquid feed inlet 23, the gas feed inlet 25, the exhaust port 20 and the discharge port 24 are provided with tight rings, and the tight rings are internally provided with compression flanges, so that the kettle body 1 is ensured to have good tightness.
The stirring device comprises a stirring shaft 11 extending into the kettle body 1, a driving device is arranged above the stirring shaft 11, stirring blades 5 are arranged below the stirring shaft 11, and the stirring blades 5 are flap paddle type stirring blades and are provided with 2 groups. The driving device is sequentially provided with a motor 7, an outer magnet 8, an inner magnet 9 and an outer magnetic card 31 from top to bottom. The outer magnet 8 and the inner magnet 9 are arranged on the upper part of the stirring shaft 11, and the outer magnetic card 31 is arranged below the inner magnet 9 to fix the inner magnet 9 on the output shaft of the motor 7. The top end of the stirring shaft 11 is provided with a boss, a groove is arranged in the boss, and the inner surface of the groove is matched with the outer surface of the lower part of the outer magnet 8 through threads and a shaft hole.
The gas distribution device is positioned below the stirring blades 5 and comprises a gas guide pipe 30 and a distribution ring 13, the distribution ring 13 is fixed on the kettle body 1, the gas guide pipe 30 is connected to the gas feed port 25, and the distribution ring 13 is provided with gas distribution holes 12; the gas distribution device below still is provided with dispersion impeller 6, and dispersion impeller 6 fixes on (mixing) shaft 11, 6 below on the dispersion impeller are provided with positioning channel 10, and positioning channel 10 is located the bottom of the cauldron body 1, and (mixing) shaft 11 passes through the shaft coupling with positioning channel 10 and links to each other, fixes (mixing) shaft 11 in the cauldron body 1 bottom through positioning channel 10. The air distribution holes 12 are bell-type air distribution holes and are uniformly distributed on the distribution ring 13.
The medicine adding device comprises a medicine storage tank 17, a pressurization tank 14 is arranged below the medicine storage tank 17, and the pressurization tank 14 is connected to the gas feeding hole 25. The medicament storage tank 17 is connected with the pressurization tank 14 through a pipeline, and a communication valve 33 is arranged on the pipeline; the medicament storage tank 17 side is provided with level gauge 16, the pressurization jar 14 top is provided with blow-down pipe 15, and the side sets up intake pipe 32, is provided with vortex flowmeter 18 on the intake pipe 32.
Example 2
The supercritical reaction kettle suitable for producing the nano hydrotalcite has the structure as described in example 1, and is different in that the supercritical reaction kettle is also provided with a temperature control system and a pressure control system; the temperature control system comprises a temperature measuring probe 22 extending out of the side wall of the kettle body 1, the output end of the temperature measuring probe 22 is electrically connected with the input end of a temperature controller, and the output end of the temperature controller is electrically connected with the input end of a heat-conducting oil inlet electromagnetic valve; the pressure control system comprises a safety valve 19 positioned at the top of the kettle body 1, a pressure detector is arranged on the safety valve 19, and the signal output end of the pressure detector is electrically connected with the vortex shedding flowmeter 18 so as to control the pressure of the reaction kettle.
When the supercritical reaction kettle is used, firstly, liquid slurry is pumped into the kettle body 1 through the liquid feed inlet 23, the motor 7 is started, and the motor 7 rotates to drive the stirring shaft 11 to rotate through the interaction of the outer magnet 8 and the inner magnet 9; the stirring blades 5 and the dispersion discs 6 connected with the stirring shaft 11 rotate to start stirring the slurry in the kettle body; then starting a heat conduction oil coil 2, raising the temperature of the kettle body slurry to the temperature required by the process, then filling carbon dioxide gas into the kettle body through a gas feed port 25, controlling the gas filling rate through a vortex flowmeter 18, enabling the gas to uniformly enter the kettle body through a gas distribution ring 13 to uniformly contact the slurry in the kettle, avoiding the generation of nonuniform gas distribution, slurry internal splash and the like, stopping gas filling when the pressure in the kettle reaches 8-9 Mpa, maintaining the pressure, enabling the kettle to enter a supercritical state, reacting for a period of time, relieving the pressure in the kettle to 2Mpa through an exhaust hole 20, maintaining the pressure for a period of time, starting a cooling water coil 3 to cool the kettle, reducing the temperature to a proper temperature and pressure, opening a communicating valve 33, enabling the modifier in a chemical agent storage tank 17 to enter a pressurization tank 14 through gravity, adding the modifier in the pressurization tank 14 into the kettle through the carbon dioxide gas, and rapidly and uniformly dispersing the gas in the kettle, after the reaction is completed, the product can be obtained from the discharge port 24. The whole reaction process controls the reaction pressure and the reaction temperature through a temperature control system and a pressure control system.
Example 3
The supercritical reaction kettle suitable for producing the nano hydrotalcite has the structure as described in example 1, and is different in that the right side of the kettle body 1 is also provided with an access hole 21. After the supercritical reactor is used for a certain time, the access hole 21 can be opened for the inspection and maintenance of the reactor.
The above description is only the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the improvement concept of the present invention within the technical scope disclosed in the present invention.
Claims (10)
1. A supercritical reaction kettle suitable for producing nano hydrotalcite is characterized by comprising a kettle body, a stirring device extending into the kettle body, a gas distribution device positioned in the kettle body and a dosing device arranged on the side surface of the kettle body;
a heat-conducting oil coil is arranged on the outer wall of the kettle body, and a cooling water coil is arranged in the kettle body; the top of the kettle body is provided with a liquid feeding hole, a gas feeding hole and an exhaust hole, and the bottom of the kettle body is provided with a discharge hole;
the stirring device comprises a stirring shaft extending into the kettle body, a driving device is arranged above the stirring shaft, and stirring blades are arranged below the stirring shaft;
the gas distribution device is positioned below the stirring blades and comprises a gas guide pipe and a distribution ring, the gas guide pipe is connected to the gas feed inlet, and the distribution ring is provided with gas distribution holes;
the dosing device comprises a medicament storage tank, a pressurization tank is arranged below the medicament storage tank, and the pressurization tank is connected to the gas feed port.
2. The supercritical reaction kettle according to claim 1, wherein the heat conducting oil coil comprises a heat conducting oil inlet and a heat conducting oil outlet, the heat conducting oil inlet and the heat conducting oil outlet are both arranged on the outer wall of the kettle body, an electromagnetic valve is arranged in the heat conducting oil inlet, and the position of the heat conducting oil inlet is lower than that of the heat conducting oil outlet;
and a heat insulation layer is also arranged on the outer side of the heat conduction oil coil pipe.
3. The supercritical reactor according to claim 1 wherein the cooling water coil comprises a cooling water inlet and a cooling water outlet, both the cooling water inlet and the cooling water outlet extend out of the reactor body, and the cooling water inlet is located higher than the cooling water outlet.
4. The supercritical reactor according to claim 1 wherein the liquid feed port, gas feed port, vent port and discharge port are provided with a tight ring with a compression flange disposed therein.
5. The supercritical reaction kettle according to claim 1, wherein the driving device is provided with a motor, an external magnet, an internal magnet and an external magnetic card in sequence from top to bottom; the stirring blades are hinge paddle type stirring blades and are totally provided with 2 groups.
6. The supercritical reaction kettle according to claim 1, wherein a dispersion plate is further arranged below the gas distribution device, the dispersion plate is fixed on the stirring shaft, a positioning clamping groove is arranged below the dispersion plate, and the stirring shaft is connected with the positioning clamping groove through a coupling.
7. The supercritical reaction kettle according to claim 1, wherein the distribution ring is fixed on the kettle body, and the gas distribution holes are bell-type gas distribution holes and are uniformly distributed on the distribution ring.
8. The supercritical reaction kettle according to claim 1, wherein the medicament storage tank and the pressurization tank are connected by a pipeline, and a communication valve is arranged on the pipeline; the medicament storage tank side is provided with the level gauge, the overhead tank top is provided with the blow-down pipe, and the side sets up the intake pipe, is provided with vortex shedding flowmeter in the intake pipe.
9. The supercritical reaction kettle according to claim 1, wherein the supercritical reaction kettle is further provided with a temperature control system and a pressure control system; the temperature control system comprises a temperature measuring probe extending out of the side wall of the kettle body, the output end of the temperature measuring probe is electrically connected with the input end of a temperature controller, and the output end of the temperature controller is electrically connected with the input end of a heat-conducting oil inlet electromagnetic valve, so that the temperature of the reaction kettle is controlled;
the pressure control system comprises a safety valve positioned at the top of the kettle body, a pressure detector is arranged on the safety valve, and the signal output end of the pressure detector is electrically connected with the vortex shedding flowmeter, so that the pressure of the reaction kettle is controlled.
10. The supercritical reaction kettle according to claim 1, wherein the right side of the kettle body is further provided with an access hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221507819.3U CN217410782U (en) | 2022-06-16 | 2022-06-16 | Supercritical reaction kettle suitable for producing nano hydrotalcite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221507819.3U CN217410782U (en) | 2022-06-16 | 2022-06-16 | Supercritical reaction kettle suitable for producing nano hydrotalcite |
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| Publication Number | Publication Date |
|---|---|
| CN217410782U true CN217410782U (en) | 2022-09-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221507819.3U Active CN217410782U (en) | 2022-06-16 | 2022-06-16 | Supercritical reaction kettle suitable for producing nano hydrotalcite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217410782U (en) |
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2022
- 2022-06-16 CN CN202221507819.3U patent/CN217410782U/en active Active
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Inventor after: Liu Yazhou Inventor before: Liu Yazhou |