CN112664935B - System for synthesizing nano particles by spray combustion - Google Patents
System for synthesizing nano particles by spray combustion Download PDFInfo
- Publication number
- CN112664935B CN112664935B CN202011560771.8A CN202011560771A CN112664935B CN 112664935 B CN112664935 B CN 112664935B CN 202011560771 A CN202011560771 A CN 202011560771A CN 112664935 B CN112664935 B CN 112664935B
- Authority
- CN
- China
- Prior art keywords
- circular tube
- tube
- circular
- gas
- movable nozzle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention belongs to the technical field of nano material synthesis, and discloses a system for synthesizing nano particles by spray combustion, which comprises a turbulence combustor and an injection pump which are connected, wherein the turbulence combustor comprises a first circular tube, a second circular tube, a plurality of gas nozzles, a third circular tube, a fourth circular tube, a capillary needle tube and a movable nozzle; a sheath gas pipeline is arranged between the first circular pipe and the second circular pipe; the gas nozzle is arranged between the second circular tube and the third circular tube; a premix gas pipeline is arranged between the third circular pipe and the fourth circular pipe; the fourth round tube is provided with a containing hole, and the movable nozzle is movably arranged in the containing hole; a first dispersion gas pipeline is formed between the movable nozzle and the fourth circular pipe; the capillary needle tube is arranged in the movable nozzle. The invention can greatly expand the structure and components of the particles, greatly improve the adjustable range of the flow velocity of the liquid precursor, remarkably increase the yield of the nano particles and achieve the industrialized amplification of flame nano particle synthesis.
Description
Technical Field
The invention belongs to the technical field related to nano material synthesis, and particularly relates to a system for synthesizing nano particles by spray combustion.
Background
The nano material has wide application in the fields of catalysis, medicine, materials, electronics and the like, wherein the nano particles have unique physicochemical characteristics, and the preparation mode of the nano particles gradually becomes a focus of attention. Flame spray combustion is a high-throughput nanomaterial synthesis process developed in recent years, and laboratory-scale equipment can achieve nanoparticle yield of more than one hundred grams per hour, so that the method is very suitable for industrial scale-up mass production and is widely used for preparing oxide particles with various structures and sizes.
Compared with the traditional wet chemical synthesis method, the flame spray combustion method directly utilizes the energy of flame, is fast synthesized in one step, has no complicated post-treatment steps (such as aging, drying, annealing and the like), does not generate waste liquid and waste residue in the production process, and has the characteristics of energy conservation, environmental protection and high efficiency; in the flame synthesis process, the multicomponent metallic oxide can be mixed on an atomic scale, and the active phase on the surface of the nano material has extremely high dispersity; the active phase can still keep high dispersion without a calcination process, so that the effective load of the metal oxide can be increased considerably; by controlling the turbulent flame, the high-flux synthesis of the functional nano particles can be realized; the characteristics of the nanoparticles can be adjusted by operating conditions such as precursor type, concentration, flow rate, solvent type, dispersion gas flow rate, and other process conditions. Therefore, the flame spray combustion synthesis nanoparticle system can greatly expand the application range of the flame synthesis mode, and opens up a new way for preparing the functional nanomaterial. The existing common experimental-scale spray pyrolysis combustion nanoparticle synthesis device has the defects of particle agglomeration sintering, residual organic matters on particles, low yield and the like because the air inlet channel is single to limit the oxygen flow rate.
Disclosure of Invention
Aiming at the defects or improvement demands of the prior art, the invention provides a system for synthesizing nano particles by spray combustion, which adopts a turbulent burner to form stable turbulent flame, forms combustion atmosphere with different equivalent ratios by directly spraying and atomizing precursors at high pressure and matching with dispersed gas, and adds secondary air supplementing equipment, so that the growth environment of the nano particles in a high-temperature area can be further regulated and controlled to realize the precise control of the particle size distribution, the physical dimension and the crystal phase purity of the nano particles, the structure and the components of the particles can be greatly expanded, the adjustable range of the flow velocity of liquid precursor is greatly improved, the yield of the nano particles can be remarkably increased, and the industrialized amplification of the flame nano particle synthesis can be realized.
In order to achieve the above object, according to one aspect of the present invention, there is provided a system for synthesizing nano particles by spray combustion, the system comprising a turbulent burner, a syringe pump, a telescopic igniter, and a stainless steel shield, the syringe pump being connected to the turbulent burner, the stainless steel shield being disposed above the turbulent burner, the telescopic igniter being disposed between the turbulent burner and the stainless steel shield;
the turbulent burner comprises a first circular tube, a second circular tube, a plurality of gas nozzles, a third circular tube, a fourth circular tube, a capillary needle tube and a movable nozzle, wherein the second circular tube is arranged in the first circular tube, the third circular tube is arranged in the second circular tube, and the fourth circular tube is arranged in the third circular tube; a sheath gas pipeline is arranged between the first circular pipe and the second circular pipe, and the sheath gas pipeline is used for allowing sheath gas to pass through so as to enter a gap between the first circular pipe and the second circular pipe; the gas nozzle is arranged between the second circular tube and the third circular tube; a premix gas pipeline is arranged between the third circular pipe and the fourth circular pipe; a first round hole is formed at one end of the fourth round tube, a conical hole is formed at the other end of the fourth round tube, the wall of the large end of the conical hole is connected with the wall of the first round hole, the first round hole and the conical hole form a containing hole together, and the movable nozzle is movably arranged in the containing hole; a first dispersion gas pipeline is formed between the movable nozzle and the fourth circular pipe; the capillary needle tube is arranged in the movable nozzle and penetrates through the movable nozzle; wherein, the one end that the capillary needle tubing kept away from the stainless steel cage is connected in the syringe pump.
Further, the size and pressure of the first dispersion gas pipe outlet are varied by adjusting the pose of the movable nozzle relative to the tapered bore.
Further, the outer diameter of the first round tube, the outer diameter of the second round tube, the outer diameter of the third round tube and the outer diameter of the fourth round tube are sequentially reduced.
Further, the system further comprises a clamp arranged between the second circular tube and the third circular tube, the gas nozzle is arranged on the clamp, and the pose of the gas nozzle is adjusted through the clamp.
Further, the precursor is sucked by the injection pump to enter the capillary needle tube, and is sprayed and atomized by the capillary needle tube; the premixed gas is ignited by the telescopic igniter to form premixed flame, and the atomized precursor is further diffused by the dispersed gas and is directly ignited by the premixed flame or the telescopic igniter to form stable turbulent flame; the gas nozzle sprays oxygen-containing mixed gas to perform secondary air supplement on the flame.
Further, the system further comprises glass fiber filter paper and an air pump, wherein the glass fiber filter paper is arranged at one end of the stainless steel isolation cover, which is far away from the turbulent burner, the cover plate is arranged on the stainless steel isolation cover, and the glass fiber filter paper is positioned between the cover plate and the stainless steel isolation cover; the air pump is connected with the glass fiber filter paper through a pipeline; the air pump draws particles onto the glass fiber filter paper for collection.
Further, the number of the capillary needle tubes is at least four, and the at least four capillary needle tubes are uniformly distributed around the central axis of the movable nozzle.
Further, the movable nozzle is provided with an internal dispersion gas pipeline, and the central axis of the internal dispersion gas pipeline is coincided with the central axis of the movable nozzle; at least four of the capillary tubes are arranged around the inner dispersion gas line.
Further, at least four of the capillary tubes can each be individually controlled.
Further, the central axis of the first circular tube, the central axis of the third circular tube, the central axis of the fourth circular tube and the central axis of the internal dispersion gas pipeline are overlapped.
In general, compared with the prior art, the system for synthesizing nano particles by spray combustion provided by the invention has the following main beneficial effects:
1. the concentration of the nano particles in the high temperature area can be diluted by secondary air supplementing, so that the agglomeration and sintering of the particles are reduced; eliminating unburned gaseous precursor and organic matters adsorbed on the surfaces of particles in primary combustion; the particles can be subjected to secondary calcination to control the crystal phase and the particle size distribution degree of the nano material; the proportion and the type of the liquid phase precursor are further increased through the secondary supplement of oxygen, and the structure and the components of the nano particles are widened.
2. The liquid phase precursor supply flow rate can be further improved due to the secondary oxygen supply, so that the yield of the nano particles can be remarkably increased; the secondary air supplementing equipment can effectively prevent particles from diffusing in a high-temperature area, and can obviously reduce the deposition of the particles on the stainless steel isolation cover; the oxygen concentration in the dispersion gas and the secondary air supplementing is flexibly regulated, so that the control of the oxygen-fuel equivalent ratio in the spray combustion synthesis is further enhanced.
3. Two or more precursor pipelines increase the proportion and the types of liquid-phase metal organic precursors, and widen the structure and the components of the nano particles; the introduction of the internal and external double-layer fuel gas can further improve the supply flow of the liquid phase precursor and can obviously increase the yield of the nano particles.
4. The sintering and agglomeration of particles can be greatly avoided by introducing the internal and external combustion-supporting gas, the external combustion-supporting gas is mutually intersected to form a conical air wall so as to prevent nano particles from diffusing to the periphery of the stainless steel isolation cover, the internal combustion-supporting gas can be sprayed with pure argon to quench turbulent flame, the agglomeration and sintering phenomena of the particles are reduced, and the specific surface area of the nano material is increased.
Drawings
FIG. 1 is a schematic diagram of a system for synthesizing nanoparticles by spray combustion provided in example 1 of the present invention;
FIG. 2 is a schematic diagram of the burner of the system for spray combustion synthesis of nanoparticles of FIG. 1;
FIG. 3 is a schematic diagram of a system for synthesizing nanoparticles by spray combustion provided in example 2 of the present invention;
fig. 4 is a schematic structural view of a burner of the system for synthesizing nanoparticles by spray combustion in fig. 3. The same reference numbers are used throughout the drawings to reference like elements or structures, wherein: 1-sheath gas pipeline, 2-gas nozzle, 3-premixed flame, 4-dispersion gas pipeline, 5-precursor pipeline, 6-injection pump, 7-capillary needle tube, 8-telescopic igniter, 9-stainless steel isolation cover, 10-glass fiber filter paper, 11-air pump, 12-clamp and 13-movable nozzle.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Example 1
Referring to fig. 1 and 2, in the system for synthesizing nano particles by spray combustion provided in embodiment 1 of the present invention, a turbulent burner is used to form a stable turbulent flame, and a precursor is directly sprayed and atomized to form a combustion atmosphere with different equivalence ratios by matching with a dispersion gas. The secondary air supplementing component is added to further regulate the growth environment of the nano particles in a high temperature area, so that the precise control of the particle size distribution, the morphological size and the crystal phase purity of the nano particles is realized, and the structure and the components of the particles can be greatly expanded. The flow rate adjustable range of the liquid precursor is greatly improved due to the further supplement of oxygen, so that the yield of the nano particles can be remarkably increased, and the industrialized amplification of the synthesis of flame nano particles can be realized. The liquid precursor is sprayed by a syringe pump through a capillary tube, and the spraying is ignited and diffused by oxygen-containing dispersed gas. By adjusting the angle of the gas nozzle, secondary air supplement is carried out in a flame high-temperature area, and heating and burning in areas are realized. Wherein, can adjust the oxygen concentration in the secondary air make-up to form different oxygen burning equivalent ratio, this system possesses advantages such as reduction agglomeration and sintering of granule, does not need secondary calcination, high yield.
The system comprises a turbulent burner, a syringe pump 6, a telescopic igniter 8, a stainless steel shield 9, glass fiber filter paper 10, an air pump 11 and a clamp 12. The clamp 12 is connected to the turbulent burner, the stainless steel isolation cover 9 is arranged above the turbulent burner, and the telescopic igniter 8 is arranged between the stainless steel isolation cover 9 and the turbulent burner. The stainless steel isolation cover 9 is provided with glass fiber filter paper 10 far away from one end of the turbulent burner, the cover plate is arranged on the stainless steel isolation cover 9, and the glass fiber filter paper 10 is positioned between the cover plate and the stainless steel isolation cover 9. The air pump 11 is connected to the glass fiber filter paper 10 through a pipe. The syringe pump 6 is connected to the turbulent burner. The cover plate is provided with a cooling pipeline for cooling water circulation so as to cool.
The turbulent burner comprises a first circular tube, a second circular tube, a plurality of gas nozzles 2, a third circular tube, a fourth circular tube, a capillary needle tube 7 and a movable nozzle 13, wherein the second circular tube is arranged in the first circular tube, the third circular tube is arranged in the second circular tube, and the fourth circular tube is arranged in the third circular tube. The outer diameter of the first circular tube, the outer diameter of the second circular tube, the outer diameter of the third circular tube and the outer diameter of the fourth circular tube are sequentially reduced.
A sheath gas pipeline 1 is arranged between the first circular pipe and the second circular pipe, and the sheath gas pipeline 1 is used for allowing sheath gas to pass through so as to enter a gap between the first circular pipe and the second circular pipe. The gas nozzle 2 is arranged between the second circular tube and the third circular tube. The clamp 12 is arranged between the second circular tube and the third circular tube, the gas nozzle 2 is arranged on the clamp 12, and the pose of the gas nozzle 2 can be adjusted through the clamp 12. A premix gas pipeline is arranged between the third circular pipe and the fourth circular pipe and is used for enabling premix gas to circulate so that the premix gas enters a gap between the third circular pipe and the fourth circular pipe.
One end of the fourth round tube forms a first round hole, the other end of the fourth round tube forms a conical hole, the wall of the big end of the conical hole is connected with the wall of the first round hole, the first round hole and the conical hole form a containing hole, and the movable nozzle 13 is movably arranged in the containing hole.
A dispersion gas pipeline 4 is formed between the movable nozzle 13 and the fourth circular pipe, and the size and pressure of the outlet of the dispersion gas pipeline 4 are changed by adjusting the pose of the movable nozzle 13 relative to the conical hole, so as to adjust the entering amount of dispersion gas.
The capillary tube 7 is disposed within the movable nozzle 13, and penetrates the movable nozzle 13. The end of the capillary tube 7, which is far away from the stainless steel isolation cover 9, is connected to the injection pump 6, and the injection pump 6 is used for sucking the precursor.
In this embodiment, a cooling pipe is also disposed in the movable nozzle 13, and cooling water is introduced into the cooling pipe to cool the movable nozzle 13; the central axis of the first circular tube, the central axis of the second circular tube, the central axis of the third circular tube, the central axis of the fourth circular tube and the central axis of the capillary tube 7 are overlapped; the plurality of gas nozzles 2 are uniformly distributed around the central axis of the fourth circular tube, and the number of the gas nozzles 2 is four, it will be understood that in other embodiments, the number of the gas nozzles 2 may be increased or decreased according to actual needs.
Nanoparticle spray combustion synthesis mainly comprises liquid precursor preparation, spray atomization of precursor solution, turbulent flame combustion and nanoparticle collection. And selecting corresponding metal organic salt as a metal precursor according to the structure and the components of the target nano-particles. Because the high gasification decomposition temperature of the metal acetate and the metal nitrate can lead to poor uniformity of the size of the nano particles, the corresponding metal 2-ethylhexyl salt and acetylacetone salt should be selected; and simultaneously, organic fuel with better solubility is selected according to the types of the metal organic salts, including dimethylbenzene, ethanol, butanol or propionic acid. Due to the addition of oxygen in the secondary make-up gas, the metal ion concentration range can significantly exceed the upper concentration limit of conventional burners. And dissolving the metal organic salt in the organic fuel and performing ultrasonic treatment to ensure complete dissolution and uniform mixing of the metal organic salt.
The precursor is sucked by the injection pump 6 and enters the precursor pipeline, then enters the capillary needle tube 7, the capillary needle tube 7 sprays and atomizes the precursor, the premixed gas is ignited by the telescopic igniter 8 to form premixed flame, the atomized precursor is further diffused by the dispersed gas and is directly ignited by the premixed flame or the telescopic igniter 8 to form stable turbulent flame. The gas nozzle 2 sprays oxygen-containing mixed gas to carry out secondary air supplement on spray flame, and the angle of the gas nozzle 2 is adjusted to ensure that the oxygen-containing mixed gas is converged in a flame combustion area, so that the purposes of oxygen supplement and secondary calcination are achieved. The outermost sheath gas of the burner consists of inert gas, which isolates the outside air and protects the stability of the burning flame. The high temperature nanoparticles are protected by stainless steel shields 9 from diffusion into the surrounding environment. The air pump 11 draws the particles onto the glass fiber filter paper 10 for collection.
Example 2
Referring to fig. 3 and 4, in the system for synthesizing nano particles by spray combustion provided in embodiment 2 of the present invention, a turbulent burner is selected to form a stable turbulent flame, and a precursor is directly sprayed and atomized at high pressure to form a combustion atmosphere with different equivalent ratios in combination with a fuel gas. The addition of the precursor pipelines can further regulate the growth environment of the nano particles in a high temperature area, so as to realize the precise control of the particle size distribution, the morphological size and the crystal phase purity of the nano particles, and greatly expand the structure and the components of the particles. The adjustable range of the flow velocity of the liquid precursor is greatly improved, the yield of the nano particles can be obviously increased, and the industrialized amplification of the synthesis of the flame nano particles can be achieved. The liquid precursor forms spray by a high-pressure injection pump through a capillary needle tube, and internal and external auxiliary fuel gas consisting of oxygen and argon ignites and diffuses the spray. Wherein the oxygen composition ratio in the fuel gas can be adjusted to form different oxygen fuel equivalent ratios. By adjusting the height of the capillary tube, the time and the area of the precursor spray converging on the flame are changed. The two or more precursor pipelines can form at least two or more different metal precursor solutions, so that the doping and the loading of multiple metal oxides and multiple elements can be formed, and the structure and the components of the nano particles are greatly expanded. The method has the advantages of reducing agglomeration and sintering of the particles, increasing the structure and components of the particles, improving the yield and the like.
The system comprises a turbulent burner, an injection pump, a telescopic igniter, a stainless steel isolation cover, glass fiber filter paper and an air pump, wherein the stainless steel isolation cover is arranged above the turbulent burner, and the telescopic igniter is arranged between the stainless steel isolation cover and the turbulent burner. The glass fiber filter paper is arranged at one end, far away from the turbulent burner, of the stainless steel isolation cover, a cover plate is arranged on the stainless steel isolation cover, and the glass fiber filter paper is arranged between the cover plate and the stainless steel isolation cover. The air pump is connected to the glass fiber filter paper. The cover plate is provided with a cooling pipeline for cooling water circulation so as to cool.
The turbulent burner comprises a first circular tube, a third circular tube, a fourth circular tube, at least four capillary needle tubes and a movable nozzle, wherein the third circular tube is arranged in the first circular tube, and the fourth circular tube is arranged in the third circular tube. The outer diameter of the first circular tube, the outer diameter of the third circular tube and the outer diameter of the fourth circular tube are sequentially reduced.
A sheath gas pipeline is arranged between the first circular pipe and the third circular pipe and is used for allowing sheath gas to pass through so as to enter a gap between the first circular pipe and the third circular pipe. A premix gas pipeline is arranged between the third circular pipe and the fourth circular pipe and is used for enabling premix gas to circulate so that the premix gas enters a gap between the third circular pipe and the fourth circular pipe.
One end of the fourth round tube forms a first round hole, the other end of the fourth round tube forms a conical hole, the wall of the big end of the conical hole is connected with the wall of the first round hole, the first round hole and the conical hole form a containing hole, and the movable nozzle is movably arranged in the containing hole.
A first dispersion gas pipeline is formed between the movable nozzle and the fourth circular pipe, the size and the pressure of an outlet of the first dispersion gas pipeline are changed by adjusting the pose of the movable nozzle relative to the conical hole, and then the entering amount of dispersion gas is adjusted. Wherein the first dispersion gas line is also referred to as an external dispersion gas line.
At least four capillary needle tubes are arranged in the movable nozzle and penetrate through the movable nozzle. One end of the capillary needle tube, which is far away from the stainless steel isolation cover, is connected with the injection pump, and the injection pump is used for sucking the precursor. At least four capillary needle tubes are uniformly distributed around the central axis of the movable nozzle, an internal dispersion gas pipeline is arranged on the movable nozzle, and the central axis of the internal dispersion gas pipeline coincides with the central axis of the movable nozzle.
In this embodiment, a cooling pipe is also provided in the movable nozzle, and cooling water is introduced into the cooling pipe to cool the movable nozzle; the central shaft of the first circular tube, the central shaft of the third circular tube, the central shaft of the fourth circular tube and the central shaft of the internal dispersion gas pipeline are overlapped; the number of capillary tubes is four, it being understood that in other embodiments the number of capillary tubes may be increased or decreased as desired.
The capillary needle tube, the corresponding injection pump and the like can be independently controlled, for example, four capillary needle tubes can be filled with the same precursor solution, and the yield of nano particles is directly increased by four times compared with that of the traditional single-nozzle flame synthesis equipment. Four or more capillary needle tubes can form two or more different metal precursor solutions, can form multiple metal oxides and doping and loading of multiple elements, and greatly expands the structure and components of the nano particles.
Nanoparticle spray combustion synthesis mainly comprises liquid precursor preparation, spray atomization of precursor solution, turbulent flame combustion and nanoparticle collection. And selecting corresponding metal organic salt as a metal precursor according to the structure and the components of the target nano-particles. Because the high gasification decomposition temperature of the metal acetate and the metal nitrate can lead to poor uniformity of the size of the nano particles, the corresponding metal 2-ethylhexyl salt and acetylacetone salt should be selected, and organic fuels with better solubility, including dimethylbenzene, ethanol, butanol or propionic acid, are selected according to the types of the metal organic salts. Because the oxygen-containing fuel gas is simultaneously introduced from the inside and the outside, the concentration range of the metal ions can significantly exceed the upper concentration limit of the conventional burner. And dissolving the metal organic salt in the organic fuel and performing ultrasonic treatment to ensure complete dissolution and uniform mixing of the metal organic salt. Igniting the premixed gas by the telescopic igniter to form premixed flame; the precursor solution is sprayed and atomized through a capillary needle tube by an injection pump and is ignited by premixed flame, so that stable turbulent flame is formed. The angles of the four capillary needle tubes are adjusted to be converged in different flame burning areas. The outermost sheath gas of the burner consists of inert gas, which isolates the outside air and protects the stability of the burning flame. The high temperature nanoparticles are protected by stainless steel shields from diffusion into the surrounding environment. The air pump draws the particles onto glass fiber filter paper for collection.
It will be appreciated that example 1 and example 2 of the present invention can be combined to provide a new system for spray burning synthetic nanoparticles, such as by replacing the movable nozzle of example 1 with the movable nozzle of example 2, and applying the arrangement of a plurality of capillary tubes to example 1.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (9)
1. A system for synthesizing nanoparticles by spray combustion, characterized by:
the system comprises a turbulent burner, a syringe pump, a telescopic igniter and a stainless steel isolation cover, wherein the syringe pump is connected to the turbulent burner, the stainless steel isolation cover is arranged above the turbulent burner, and the telescopic igniter is arranged between the turbulent burner and the stainless steel isolation cover;
the turbulent burner comprises a first circular tube, a second circular tube, a plurality of gas nozzles, a third circular tube, a fourth circular tube, a capillary needle tube and a movable nozzle, wherein the second circular tube is arranged in the first circular tube, the third circular tube is arranged in the second circular tube, and the fourth circular tube is arranged in the third circular tube; a sheath gas pipeline is arranged between the first circular pipe and the second circular pipe, and the sheath gas pipeline is used for allowing sheath gas to pass through so as to enter a gap between the first circular pipe and the second circular pipe; the gas nozzle is arranged between the second circular tube and the third circular tube; a premix gas pipeline is arranged between the third circular pipe and the fourth circular pipe; a first round hole is formed at one end of the fourth round tube, a conical hole is formed at the other end of the fourth round tube, the wall of the large end of the conical hole is connected with the wall of the first round hole, the first round hole and the conical hole form a containing hole together, and the movable nozzle is movably arranged in the containing hole; a first dispersion gas pipeline is formed between the movable nozzle and the fourth circular pipe; the capillary needle tube is arranged in the movable nozzle and penetrates through the movable nozzle; wherein, one end of the capillary needle tube far away from the stainless steel isolation cover is connected with the injection pump;
the size and pressure of the outlet of the first dispersion gas pipeline are changed by adjusting the pose of the movable nozzle relative to the conical hole; the gas nozzle sprays oxygen-containing mixed gas to perform secondary air supplement on the flame.
2. The system for synthesizing nano-particles by spray combustion according to claim 1, wherein: the outer diameter of the first circular tube, the outer diameter of the second circular tube, the outer diameter of the third circular tube and the outer diameter of the fourth circular tube are sequentially reduced.
3. The system for synthesizing nano-particles by spray combustion according to claim 1, wherein: the system further comprises a clamp, the clamp is arranged between the second circular tube and the third circular tube, the gas nozzle is arranged on the clamp, and the pose of the gas nozzle is adjusted through the clamp.
4. The system for synthesizing nano-particles by spray combustion according to claim 1, wherein: the precursor is sucked by the injection pump to enter the capillary needle tube, and is sprayed and atomized by the capillary needle tube; the premixed gas is ignited by the telescopic igniter to form premixed flame, and the atomized precursor is further diffused through the dispersed gas and is directly ignited by the premixed flame or the telescopic igniter to form stable turbulent flame.
5. A system for synthesizing nanoparticles by spray combustion as claimed in any one of claims 1 to 4, wherein: the system further comprises glass fiber filter paper and an air pump, wherein the glass fiber filter paper is arranged at one end of the stainless steel isolation cover, which is far away from the turbulent burner, the cover plate is arranged on the stainless steel isolation cover, and the glass fiber filter paper is positioned between the cover plate and the stainless steel isolation cover; the air pump is connected with the glass fiber filter paper through a pipeline; the air pump draws particles onto the glass fiber filter paper for collection.
6. A system for synthesizing nanoparticles by spray combustion as claimed in any one of claims 1 to 4, wherein: the number of the capillary needle tubes is at least four, and the at least four capillary needle tubes are uniformly distributed around the central axis of the movable nozzle.
7. The system for synthesizing nano-particles by spray combustion according to claim 6, wherein: the movable nozzle is provided with an internal dispersion gas pipeline, and the central axis of the internal dispersion gas pipeline coincides with the central axis of the movable nozzle; at least four of the capillary tubes are arranged around the inner dispersion gas line.
8. The system for synthesizing nano-particles by spray combustion according to claim 6, wherein: at least four of the capillary tubes can each be individually controlled.
9. The system for synthesizing nano-particles by spray combustion according to claim 7, wherein: the central axis of the first circular tube, the central axis of the third circular tube, the central axis of the fourth circular tube and the central axis of the internal dispersion gas pipeline are overlapped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011560771.8A CN112664935B (en) | 2020-12-25 | 2020-12-25 | System for synthesizing nano particles by spray combustion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011560771.8A CN112664935B (en) | 2020-12-25 | 2020-12-25 | System for synthesizing nano particles by spray combustion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112664935A CN112664935A (en) | 2021-04-16 |
| CN112664935B true CN112664935B (en) | 2023-08-25 |
Family
ID=75408925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011560771.8A Active CN112664935B (en) | 2020-12-25 | 2020-12-25 | System for synthesizing nano particles by spray combustion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112664935B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113719837A (en) * | 2021-09-01 | 2021-11-30 | 东南大学 | Micro-scale flame burner for micro-nano material preparation |
| CN114534634B (en) * | 2022-01-18 | 2023-06-09 | 清华大学 | Liquid fuel self-sustaining combustion flame synthesis burner |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1361533A (en) * | 1971-04-06 | 1974-07-24 | Gen Electric | Nozzle for chemical reaction process |
| CN1196117A (en) * | 1995-09-07 | 1998-10-14 | 奥地利钢铁联合企业阿尔帕工业设备制造公司 | Process for burning fuel |
| CN1859969A (en) * | 2003-06-13 | 2006-11-08 | 美国莫博特克公司 | Co-axial rofa injection system |
| CN1884910A (en) * | 2005-06-24 | 2006-12-27 | 株式会社日立制作所 | Burner, gas turbine combustor, burner cooling method, and burner modifying method |
| CN1995813A (en) * | 2005-08-04 | 2007-07-11 | 乔治洛德方法研究和开发液化空气有限公司 | Method for combusting a liquid fuel with staged atomisation |
| JP2010037134A (en) * | 2008-08-04 | 2010-02-18 | Taiyo Nippon Sanso Corp | Method for manufacturing inorganic spheroidized particle |
| CN102330978A (en) * | 2010-07-13 | 2012-01-25 | 通用电气公司 | Flame tolerant secondary fuel nozzle |
| CN102430762A (en) * | 2010-09-01 | 2012-05-02 | 戴雷克塔普拉斯有限公司 | Multiple feeder reactor for the production of nano-particles of metal |
| CN204756937U (en) * | 2015-06-05 | 2015-11-11 | 天津特贝佳环保科技发展有限公司 | Include oil feed air inlet unit of formula combustor |
| CN110081447A (en) * | 2019-05-08 | 2019-08-02 | 徐州工程学院 | Gas fuel burning device |
| CN110465257A (en) * | 2019-09-20 | 2019-11-19 | 清华大学 | A kind of nano particle swirl flame atomization doping synthesis system and its synthetic method |
| CN111999428A (en) * | 2020-08-20 | 2020-11-27 | 清华大学 | Constant volume combustion bomb for measuring turbulent flame propagation speed of liquid fuel |
-
2020
- 2020-12-25 CN CN202011560771.8A patent/CN112664935B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1361533A (en) * | 1971-04-06 | 1974-07-24 | Gen Electric | Nozzle for chemical reaction process |
| CN1196117A (en) * | 1995-09-07 | 1998-10-14 | 奥地利钢铁联合企业阿尔帕工业设备制造公司 | Process for burning fuel |
| CN1859969A (en) * | 2003-06-13 | 2006-11-08 | 美国莫博特克公司 | Co-axial rofa injection system |
| CN1884910A (en) * | 2005-06-24 | 2006-12-27 | 株式会社日立制作所 | Burner, gas turbine combustor, burner cooling method, and burner modifying method |
| CN1995813A (en) * | 2005-08-04 | 2007-07-11 | 乔治洛德方法研究和开发液化空气有限公司 | Method for combusting a liquid fuel with staged atomisation |
| JP2010037134A (en) * | 2008-08-04 | 2010-02-18 | Taiyo Nippon Sanso Corp | Method for manufacturing inorganic spheroidized particle |
| CN102330978A (en) * | 2010-07-13 | 2012-01-25 | 通用电气公司 | Flame tolerant secondary fuel nozzle |
| CN102430762A (en) * | 2010-09-01 | 2012-05-02 | 戴雷克塔普拉斯有限公司 | Multiple feeder reactor for the production of nano-particles of metal |
| CN204756937U (en) * | 2015-06-05 | 2015-11-11 | 天津特贝佳环保科技发展有限公司 | Include oil feed air inlet unit of formula combustor |
| CN110081447A (en) * | 2019-05-08 | 2019-08-02 | 徐州工程学院 | Gas fuel burning device |
| CN110465257A (en) * | 2019-09-20 | 2019-11-19 | 清华大学 | A kind of nano particle swirl flame atomization doping synthesis system and its synthetic method |
| CN111999428A (en) * | 2020-08-20 | 2020-11-27 | 清华大学 | Constant volume combustion bomb for measuring turbulent flame propagation speed of liquid fuel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112664935A (en) | 2021-04-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112664935B (en) | System for synthesizing nano particles by spray combustion | |
| CN110465257B (en) | Nanoparticle swirl flame atomization doping synthesis system and synthesis method thereof | |
| DE2653404A1 (en) | PROCESS AND BURNER FOR BURNING LIQUID FUEL, IN PARTICULAR OIL | |
| CN105698172B (en) | A kind of petal fractional combustion combustion gas low NO | |
| CN100436945C (en) | Fuel pre-evaporation and premix perforated pipe | |
| CN211755033U (en) | Nanoparticle rotational flow flame atomization doping synthesis system | |
| CH708575A2 (en) | Dual fuel combustor for a gas turbine engine. | |
| CN201715513U (en) | Inferior high velocity burner | |
| CN112664936B (en) | System for synthesizing nano-particles by multi-nozzle spray combustion | |
| CN112555829B (en) | Spray gun capable of generating supersonic airflow | |
| CN107511123B (en) | Atomized flame nanoparticle synthesis system based on multi-cyclone reinforced mixing | |
| CN104674156A (en) | High-speed fuel oil atomizing spray nozzle for thermally spraying fuel gas | |
| CN103277815B (en) | Lean oil portion pre-mixing pre-evaporation homogenizing oil feeding device | |
| US10352556B2 (en) | Method and burner for reducing nitrogen oxide emissions during the combustion of a gaseous fuel | |
| CN107990353B (en) | The jet nozzle of the soft combustion chamber of gas turbine | |
| CN112815307A (en) | Liquid fuel combustion flame adjusting burner device | |
| CN112228904B (en) | Lean oil premixing flame tube air inlet structure | |
| JP2007291515A (en) | Particulate, and method and apparatus for producing the same | |
| CN205655293U (en) | Petaloid fractional combustion gas low NOx burner | |
| CN104611066B (en) | Gasifier nozzle | |
| CN212252641U (en) | Incinerator combustion device for pharmaceutical liquid waste | |
| CN109579004B (en) | Low-temperature low-NOx natural gas combustion system and combustion method | |
| CN207596939U (en) | A kind of supersonic flame sprayer | |
| CN214468601U (en) | Liquid fuel combustion flame adjusting experimental device | |
| Jiang et al. | Measurements in a combustor operated on alternative liquid fuels |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |