CN217119887U - Supercritical production system of nano hydrotalcite - Google Patents
Supercritical production system of nano hydrotalcite Download PDFInfo
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- CN217119887U CN217119887U CN202221073271.6U CN202221073271U CN217119887U CN 217119887 U CN217119887 U CN 217119887U CN 202221073271 U CN202221073271 U CN 202221073271U CN 217119887 U CN217119887 U CN 217119887U
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Abstract
The utility model relates to a supercritical production system of nanometer hydrotalcite. Comprises a pretreatment device, a production device, a gas phase recovery device and a liquid phase filter pressing device which are connected in sequence through pipelines; the pretreatment device comprises a raw material premixing kettle, a pure water tank and an alcohol liquid tank which are connected to the raw material premixing kettle through pipelines; the production device comprises a high-pressure reaction kettle, a modifier tank and a carbon dioxide conveying tank which are connected to the high-pressure reaction kettle through pipelines; the gas phase recovery device comprises a decompression separation tank, a gas bag and a carbon dioxide recovery tank which are sequentially connected through a pipeline; the liquid phase filter pressing device comprises a slurry storage tank, a diaphragm filter press and a recycling liquid storage tank which are sequentially connected through pipelines. The utility model provides a supercritical production system of nanometer hydrotalcite introduces the hydrothermal synthesis with supercritical fluid technology in, has realized at the synthetic nanometer hydrotalcite of supercritical state, and the nanometer hydrotalcite of preparation has the advantage that particle size distribution is narrow, the crystallinity is high, the surface is round and tidy.
Description
Technical Field
The utility model relates to a supercritical production system of nanometer hydrotalcite belongs to hydrotalcite environmental protection synthesis technical field.
Background
Hydrotalcite is an artificially synthesized layered mineral material which is started in recent years, can be used as a catalyst and a catalyst carrier in the fields of chemistry and chemical industry, and can be used as a new generation of acid-resistant and gastric mucosa protective agent in the pharmaceutical industry; in the field of functional materials, as infrared and ultraviolet absorbing and blocking materials; in the plastic industry, can be used as an antibacterial additive, a flame retardant and a PVC stabilizer; in the field of environmental protection, the compounds have strong adsorption effect on a plurality of toxic and harmful anions, so the compounds have wide application prospect in the aspects of water quality purification, sewage treatment, pollution prevention, environmental remediation and the like.
The conventional production technology of the nano magnesium-aluminum hydrotalcite is an ion process, soluble metal salt is used as a raw material, the ion process can well regulate and control the crystal morphology of the hydrotalcite, hydrotalcite particles with different grain sizes, diameter-thickness ratios and specific surface areas are prepared, and the hydrotalcite particles can be better applied to different polymers. The large amount of wastewater and by-products thus generated causes problems such as low productivity, increased production cost, and environmental deterioration.
The supercritical fluid superfine particle preparing technology is to dissolve solute into saturated solution fully under the formation of supercritical fluid, reduce pressure to result in supersaturation and homogeneous nucleation of solute particles, and may be used in producing small particle chemical matter. However, the technology is not applied to the field of hydrotalcite, and no corresponding industrial production equipment exists at present.
SUMMERY OF THE UTILITY MODEL
To the not enough of prior art, the utility model provides a supercritical production system of nanometer hydrotalcite.
The technical scheme of the utility model as follows:
a supercritical production system of nano hydrotalcite comprises a pretreatment device, a production device, a gas phase recovery device and a liquid phase filter pressing device which are sequentially connected through pipelines;
the pretreatment device comprises a raw material premixing kettle, a pure water tank and an alcohol liquid tank which are connected to the raw material premixing kettle through pipelines;
the production device comprises a high-pressure reaction kettle, a modifier tank and a carbon dioxide conveying tank, wherein the modifier tank and the carbon dioxide conveying tank are connected to the high-pressure reaction kettle through pipelines;
the gas phase recovery device comprises a decompression separation tank, a gas bag and a carbon dioxide recovery tank which are sequentially connected through a pipeline;
the liquid phase filter pressing device comprises a slurry storage tank, a diaphragm filter press and a recycling liquid storage tank which are sequentially connected through pipelines.
According to the utility model discloses it is preferred, be provided with first delivery pump and first turbine flowmeter on the connecting tube of cauldron and pure water tank are mixed in advance to the raw materials.
According to the utility model discloses it is preferred, be provided with second delivery pump and second turbine flowmeter on the connecting tube of cauldron and the mellow wine liquid jar are mixed in advance to the raw materials.
According to the utility model discloses it is preferable, still be provided with the circulating line who connects the raw materials in advance on the cauldron in advance to the raw materials and mix cauldron top and bottom, be provided with the grinding pump on the circulating line.
According to the utility model discloses it is preferred, the raw materials mixes the cauldron in advance for atmospheric pressure reation kettle, sets up high-speed dispersion impeller and baffling board in the cauldron, the raw materials mixes cauldron bottom in advance and is connected with the high-pressure batch autoclave top, is provided with the third delivery pump on the connecting tube.
According to the utility model discloses it is preferred, be provided with the fourth delivery pump on the connecting tube of high-pressure batch autoclave and modifier jar.
According to the utility model discloses it is preferred, be provided with first booster pump and first vortex flowmeter on the connecting tube of high-pressure batch autoclave and carbon dioxide transport tank.
According to the optimization of the utility model, the top of the high-pressure reaction kettle is respectively connected with the decompression separation tank and the carbon dioxide recovery tank through pipelines to form circulation; the bottom of the high-pressure reaction kettle is connected to the top of the slurry storage tank; the bottom of the decompression separation tank is connected to the top of the slurry storage tank.
According to the utility model discloses it is preferred, be provided with second booster pump and second vortex flowmeter on the connecting tube of high-pressure batch autoclave and carbon dioxide recovery jar.
According to the utility model, a slurry delivery pump is arranged on the connecting pipeline of the slurry storage tank and the membrane filter press; and a hydrotalcite discharge port is formed at the bottom of the membrane filter press.
According to the utility model discloses it is preferred, retrieval and utilization liquid storage tank passes through the pipe connection and returns the raw materials and mix the cauldron top in advance, be provided with fifth delivery pump and third turbine flowmeter on the connecting tube.
The utility model discloses not exhaustive, all can adopt prior art.
The beneficial effects of the utility model reside in that:
1. the utility model provides a supercritical production system of nanometer hydrotalcite introduces the hydrothermal synthesis with supercritical fluid technology in, has realized at the synthetic nanometer hydrotalcite of supercritical state, and the nanometer hydrotalcite of preparation has that particle size distribution is narrow, specific surface area is little, the controllable advantage of footpath thickness ratio.
2. The utility model provides a nanometer hydrotalcite's supercritical production system's reaction rate is fast, and the reaction is easy to control to the gaseous phase recovery unit and the liquid phase filter pressing device that are equipped with have all carried out the recovery to carbon dioxide gas and filtrating, and no accessory substance, safety ring protects, is fit for industrial production.
Drawings
Fig. 1 is a schematic structural view of the present invention;
in the figure: 1. a raw material premixing kettle; 2. a pure water tank; 3. an alcohol solution tank; 4. a high-pressure reaction kettle; 5. a modifier tank; 6. a carbon dioxide transfer tank; 7. a reduced-pressure separation tank; 8. air bags; 9. a carbon dioxide recovery tank; 10. a slurry storage tank; 11. a membrane filter press; 12. a recycling liquid storage tank; 13. a first delivery pump; 14. a first turbine flow meter; 15. a second delivery pump; 16. a second turbine flow meter; 17. a grinding pump; 18. a third delivery pump; 19. a fourth delivery pump; 20. a first booster pump; 21. a first vortex shedding flowmeter; 22. a second booster pump; 23. a second vortex shedding flowmeter; 24. a slurry delivery pump; 25. a discharge port; 26. a fifth delivery pump; 27. a third turbine flow meter.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying 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 fig. 1, a supercritical production system of nano hydrotalcite comprises a pretreatment device, a production device, a gas phase recovery device and a liquid phase filter pressing device which are sequentially connected through a pipeline; the pretreatment device comprises a raw material premixing kettle 1, and a pure water tank 2 and an alcohol liquid tank 3 which are connected to the raw material premixing kettle 1 through pipelines; the production device comprises a high-pressure reaction kettle 4, a modifier tank 5 and a carbon dioxide conveying tank 6, wherein the modifier tank 5 and the carbon dioxide conveying tank are connected to the high-pressure reaction kettle 4 through pipelines; the gas phase recovery device comprises a decompression separation tank 7, a gas bag 8 and a carbon dioxide recovery tank 9 which are connected in sequence through pipelines; the liquid phase filter pressing device comprises a slurry storage tank 10, a membrane filter press 11 and a recycling liquid storage tank 12 which are connected in sequence through pipelines.
The raw material premixing kettle 1 is a normal pressure reaction kettle, a high-speed dispersion disc and a baffle plate are arranged in the kettle, and the bottom of the raw material premixing kettle 1 is connected with the top of a high-pressure reaction kettle 4.
The design pressure of the high-pressure reaction kettle 4 is 12Mpa, and the top of the high-pressure reaction kettle 4 is respectively connected with the decompression separation tank 7 and the carbon dioxide recovery tank 9 through pipelines to form circulation. The bottom of the decompression separation tank 7 is connected to the top of a slurry storage tank 10. The bottom of the high-pressure reaction kettle 4 is connected to the top of the slurry storage tank 10. The bottom of the membrane filter press 11 is provided with a hydrotalcite discharge port 25.
The design pressure of the high-pressure reaction kettle 4 is 12Mpa, the carbon dioxide conveying tank 6 and the carbon dioxide recovery tank 9 are high-pressure storage tanks, and the design pressure is 7-8 Mpa.
Example 2
The supercritical production system of nano hydrotalcite has the structure as described in example 1, except that a first delivery pump 13 and a first turbine flowmeter 14 are disposed on the connecting pipeline of the raw material premixing kettle 1 and the pure water tank 2. And a second delivery pump 15 and a second turbine flowmeter 16 are arranged on a connecting pipeline of the raw material premixing kettle 1 and the alcohol liquid tank 3. Still be provided with the circulating line who connects raw materials premixing cauldron 1 top and bottom on the raw materials premixing cauldron 1, be provided with grinding pump 17 on the circulating line. And a third delivery pump 18 is arranged on a connecting pipeline of the raw material premixing kettle 1 and the high-pressure reaction kettle 4. And a fourth delivery pump 19 is arranged on a connecting pipeline of the high-pressure reaction kettle 4 and the modifier tank 5. And a first booster pump 20 and a first vortex shedding flowmeter 21 are arranged on a connecting pipeline of the high-pressure reaction kettle 4 and the carbon dioxide conveying tank 6. And a second booster pump 22 and a second vortex shedding flowmeter 23 are arranged on a connecting pipeline of the high-pressure reaction kettle 4 and the carbon dioxide recovery tank 9. And a slurry conveying pump 24 is arranged on a connecting pipeline of the slurry storage tank 10 and the membrane filter press 11. The recycling liquid storage tank 12 is connected to the top of the raw material premixing kettle 1 through a pipeline, and a fifth delivery pump 26 and a third turbine flowmeter 27 are arranged on the connecting pipeline.
The supercritical production system of the nano hydrotalcite of the embodiment has the following working process:
adding pure water, alcohol liquid and recycling liquid into a raw material premixing kettle 1 through a pure water tank 2 and an alcohol liquid tank 3, then adding solid raw materials, starting a dispersion disc after adding, starting a grinding pump for circulating grinding for 1-2 hours after timing for 20min, completing raw material premixing, sending the raw materials into a high-pressure reaction kettle 4, starting stirring and heating to reaction temperature, introducing carbon dioxide into the high-pressure reaction kettle 4 through a carbon dioxide conveying tank 6 and a carbon dioxide recovery tank 9 to reach reaction pressure for nano hydrotalcite synthesis, releasing pressure from the high-pressure reaction kettle 4 into a pressure reduction separation tank 7 after reacting for a period of time, performing gas-liquid separation through the pressure reduction separation tank 7, enabling a gas phase to enter the carbon dioxide recovery tank 9 through a gas bag 8 for storage, and enabling a liquid phase to enter a slurry storage tank 10; after the reaction is finished, introducing the reaction product into a slurry storage tank 10 from the high-pressure reaction kettle 4, then carrying out solid-liquid separation through a membrane filter press 11, continuously introducing the liquid into a recycling liquid storage tank 12, and returning the liquid from the recycling liquid storage tank 12 to the raw material premixing kettle 1 for circular production; the solid is the product nano hydrotalcite and is discharged from a discharge hole.
In the whole using process, power is provided by a delivery pump and a booster pump on the pipeline respectively, and the dosage of each raw material is controlled by a turbine flowmeter and a vortex shedding flowmeter.
The solid raw materials in the embodiment are magnesium hydroxide, aluminum hydroxide, lithium hydroxide, zinc oxide, calcium hydroxide and the like, and are directly fed by an auger.
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 production system of nano hydrotalcite is characterized by comprising a pretreatment device, a production device, a gas phase recovery device and a liquid phase filter pressing device which are sequentially connected through pipelines;
the pretreatment device comprises a raw material premixing kettle, a pure water tank and an alcohol liquid tank which are connected to the raw material premixing kettle through pipelines;
the production device comprises a high-pressure reaction kettle, a modifier tank and a carbon dioxide conveying tank, wherein the modifier tank and the carbon dioxide conveying tank are connected to the high-pressure reaction kettle through pipelines;
the gas phase recovery device comprises a decompression separation tank, a gas bag and a carbon dioxide recovery tank which are sequentially connected through a pipeline;
the liquid phase filter pressing device comprises a slurry storage tank, a diaphragm filter press and a recycling liquid storage tank which are sequentially connected through pipelines.
2. The supercritical production system of nano hydrotalcite according to claim 1, wherein a first delivery pump and a first turbine flowmeter are arranged on the connecting pipeline of the raw material premixing kettle and the pure water tank; and a second delivery pump and a second turbine flowmeter are arranged on a connecting pipeline of the raw material premixing kettle and the alcohol liquid tank.
3. The supercritical production system of nano hydrotalcite according to claim 1, wherein the raw material premixing kettle is further provided with a circulation pipeline connecting the top and the bottom of the raw material premixing kettle, and the circulation pipeline is provided with a grinding pump.
4. The supercritical production system of nano hydrotalcite according to claim 1, wherein the raw material premixing kettle is an atmospheric pressure reaction kettle, a high-speed dispersion disc and a baffle plate are arranged in the kettle, the bottom of the raw material premixing kettle is connected with the top of the high-pressure reaction kettle, and a third delivery pump is arranged on the connecting pipeline.
5. The supercritical production system of nano hydrotalcite according to claim 1, wherein a fourth transfer pump is disposed on the connecting pipeline of the high pressure reaction kettle and the modifier tank.
6. The supercritical production system of nano hydrotalcite according to claim 1, wherein a first booster pump and a first vortex shedding flowmeter are arranged on the connecting pipeline of the high-pressure reaction kettle and the carbon dioxide conveying tank.
7. The supercritical production system of nano hydrotalcite according to claim 1, wherein the top of the high pressure reaction vessel is connected with a pressure reduction separation tank and a carbon dioxide recovery tank through pipelines, respectively, to form a cycle; the bottom of the high-pressure reaction kettle is connected to the top of the slurry storage tank; the bottom of the decompression separation tank is connected to the top of the slurry storage tank.
8. The supercritical production system of nano hydrotalcite according to claim 1, wherein a second booster pump and a second vortex shedding flowmeter are arranged on the connecting pipeline of the high-pressure reaction kettle and the carbon dioxide recovery tank.
9. The supercritical production system of nano hydrotalcite according to claim 1, wherein a slurry delivery pump is arranged on the connecting pipeline of the slurry storage tank and the membrane filter press; and a hydrotalcite discharge port is formed at the bottom of the membrane filter press.
10. The supercritical production system of nano hydrotalcite according to claim 1, wherein the recycling liquid storage tank is connected back to the top of the raw material premixing kettle through a pipeline, and a fifth delivery pump and a third turbine flowmeter are arranged on the connecting pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221073271.6U CN217119887U (en) | 2022-05-06 | 2022-05-06 | Supercritical production system of nano hydrotalcite |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221073271.6U CN217119887U (en) | 2022-05-06 | 2022-05-06 | Supercritical production system of nano hydrotalcite |
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| CN217119887U true CN217119887U (en) | 2022-08-05 |
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| CN202221073271.6U Active CN217119887U (en) | 2022-05-06 | 2022-05-06 | Supercritical production system of nano hydrotalcite |
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- 2022-05-06 CN CN202221073271.6U patent/CN217119887U/en active Active
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