Nano-powder gas-phase synthesis equipment
By employing a gas-phase flame synthesis method with a gas-phase nanopowder synthesis device, the problems of low high-temperature efficiency and difficulty in controlling particle size in the preparation of spinel nanopowder have been solved, enabling efficient and uniform mass production that is suitable for industrial production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUZHEN LABORATORY
- Filing Date
- 2025-03-28
- Publication Date
- 2026-04-28
AI Technical Summary
Existing technologies for preparing spinel nanopowders suffer from problems such as low high-temperature efficiency, difficulty in controlling particle size, unstable product quality, agglomeration, and low yield, making it difficult to achieve large-scale production.
The equipment for gas-phase synthesis of nanoparticles includes a synthesis reactor, a precursor injection device, a gas conveying device, a nanoparticle collection device, and a sealed container. Nanoparticles are generated through gas-phase flame synthesis. The negative pressure generation device and control device are used to control the reaction and collect the product, thereby improving the purity and particle size uniformity.
It improves the reaction rate, enhances the purity and particle size uniformity of the product, and enables large-scale, efficient production, making it suitable for industrial applications.
Smart Images
Figure CN224167485U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of nanomaterial preparation technology, and more specifically, to a device for the gas-phase synthesis of nanopowders. Background Technology
[0002] Spinel powder is a type of nanoparticle with a spinel structure. Due to its excellent physicochemical properties, it has wide applications in transparent ceramics, electronics, and refractory materials. Currently, common methods for preparing spinel nanoparticles include solid-state reaction, sol-gel, and coprecipitation methods. These methods all have certain limitations: solid-state reaction typically requires high temperatures, has low efficiency, and struggles to precisely control particle size, resulting in poor product quality stability; the sol-gel method requires stringent synthesis conditions, and shrinkage and microporous structures easily occur during gel drying, affecting product quality and consistency; coprecipitation methods are prone to agglomeration, leading to uneven particle size distribution. Furthermore, all of the above synthesis methods suffer from low yields and difficulty in large-scale production. Utility Model Content
[0003] To solve the above-mentioned technical problems, this utility model provides a gas-phase synthesis device for nanopowders, which can improve the reaction rate, enhance the purity and particle size uniformity of the product, and enable large-scale and efficient production.
[0004] This utility model provides a nanopowder gas-phase synthesis device, which includes:
[0005] The synthesis reactor is equipped with a flame generating component inside, and also has a gas inlet and a precursor injection device facing the flame generating component;
[0006] A precursor delivery device is connected to the precursor injection device, which is used to inject the precursor into the flame generating component;
[0007] A gas delivery device is connected to the gas inlet, which is used to inject the reaction gas into the flame generating component;
[0008] The nanoparticle collection device is connected to the nanoparticle outlet of the synthesis reactor and also connected to the negative pressure generating device.
[0009] A sealed container is fitted around the outside of the synthesis reactor.
[0010] Preferably, the above-mentioned nanopowder gas-phase synthesis equipment further includes:
[0011] A temperature detection device is provided, with the temperature detection end located inside the synthesis reactor and the temperature data transmission end located outside the sealed container.
[0012] Preferably, the above-mentioned nanopowder gas-phase synthesis equipment further includes:
[0013] A real-time pressure monitoring device is provided, with the pressure monitoring end located inside the synthesis reactor and the pressure data transmission end located outside the sealed container.
[0014] Preferably, the above-mentioned nanopowder gas-phase synthesis equipment further includes:
[0015] The control device is also communicatively connected to the gas conveying device, the precursor conveying device, the negative pressure generating device, the temperature detection device, and the real-time pressure monitoring device, and is used to adjust the negative pressure value of the negative pressure generating device, the flow rate of the gas conveying device, and the feeding speed of the precursor conveying device according to the temperature and real-time pressure.
[0016] A display device, which is communicatively connected to the control device, is located outside the sealed container and is used to display real-time temperature and real-time pressure.
[0017] Preferably, the above-mentioned nanopowder gas-phase synthesis equipment further includes:
[0018] The flame observation window includes a first observation section located on the side of the synthesis reactor and facing the flame generating component, and a second observation section located on the side of the sealed container and corresponding to the position of the first observation section.
[0019] Preferably, the above-mentioned nanopowder gas-phase synthesis equipment further includes:
[0020] The powder synthesis observation window includes a third observation section located on the side of the synthesis reactor at a preset height above the flame generating component, and a fourth observation section located on the side of the sealed container corresponding to the position of the third observation section.
[0021] Preferably, in the above-mentioned nanopowder gas-phase synthesis equipment, the synthesis reactor and the nanopowder collecting device are connected by a quick-connect chuck.
[0022] Preferably, in the above-mentioned nanopowder gas-phase synthesis equipment, the nanopowder collecting device includes:
[0023] Collectors;
[0024] A filter cartridge, disposed inside the collector, includes a stainless steel frame and a high-temperature resistant filter bag fitted over the outside of the stainless steel frame. The high-temperature resistant filter bag is used to adsorb nanoparticles in the presence of negative pressure.
[0025] A blowing component is disposed on the top of the collector and communicates with the filter cartridge, used to blow away the nanoparticles adsorbed on the surface of the high-temperature resistant filter bag when the negative pressure is closed;
[0026] A receiving hopper, located at the bottom of the collector, is used to collect nanoparticles.
[0027] Preferably, in the above-mentioned nanopowder gas phase synthesis equipment, the negative pressure generating device is a negative pressure fan.
[0028] Preferably, in the above-mentioned nanopowder gas phase synthesis equipment, the precursor injection device is a flat nozzle or an externally protruding nozzle.
[0029] As can be seen from the above technical solution, the above-mentioned gas-phase synthesis equipment for nanoparticles provided by this utility model includes a synthesis reactor with a flame generating component inside, a gas inlet, and a precursor injection device facing the flame generating component; a precursor conveying device connected to the precursor injection device, which is used to inject the precursor to the flame generating component; a gas conveying device connected to the gas inlet, which is used to inject the reaction gas to the flame generating component; and a nanoparticle collecting device connected to the nanoparticle outlet of the synthesis reactor and connected to a negative pressure generating device. The negative pressure generated by the negative pressure generating device can adsorb the generated nanoparticles into the nanoparticle collecting device. Furthermore, since it includes a sealed container fitted around the synthesis reactor, it achieves the functions of sound insulation and noise reduction, prevention of powder contamination, and improvement of product purity. Therefore, it can be seen that the above-mentioned equipment uses gas-phase flame synthesis to generate nanoparticles, which can improve the reaction rate, improve the purity and particle size uniformity of the product, and achieve large-scale and efficient production. Attached Figure Description
[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0031] Figure 1 This is a schematic diagram of an embodiment of a nanopowder gas-phase synthesis device provided by this utility model. Detailed Implementation
[0032] The core of this invention is to provide a gas-phase synthesis device for nanopowders, which can improve the reaction rate, enhance the purity and particle size uniformity of the product, and achieve large-scale and efficient production. This gas-phase synthesis device for nanopowders can, but is not limited to, synthesize multi-component nanopowders with spinel structures.
[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0034] An example of an embodiment of the nanopowder vapor phase synthesis device provided by this utility model. Figure 1 As shown, Figure 1 This is a schematic diagram of an embodiment of a nanopowder vapor phase synthesis device provided by this utility model. The nanopowder vapor phase synthesis device may include:
[0035] The synthesis reactor 1 has an internal space of a certain volume, including a reaction zone, for carrying out gas-phase synthesis reactions and providing a channel space for conveying nanoparticles. It is equipped with a flame generating component 101. The generated flame can be used for gas-phase synthesis reactions to evaporate the liquid phase components in the precursors, leaving only the solid phase nanoparticle components. The synthesis reactor 1 also has a gas inlet 102 and a precursor injection device 103 facing the flame generating component 101. The gas inlet 102 can be directed to the location of the flame generating component 101, and the precursor injection device 103 is used to direct the precursors to the location of the flame generating component 101. Together, they provide precursors and gas for the gas-phase synthesis reaction. The synthesis reactor 1 can also have a discharge port, which can be connected to the inlet of the nanoparticle collecting device 4 through a quick-connect chuck 13. In this way, under the negative pressure of the nanoparticle collecting device 4, the powder can enter the inlet of the nanoparticle collecting device 4 from the discharge port of the synthesis reactor 1 and then enter the nanoparticle collecting device 4.
[0036] The precursor conveying device 2 is connected to the precursor spraying device 103, which is used to spray the precursor to the flame generating component 101. Specifically, the precursor can be a precursor liquid, generally a metal salt solution. The precursor conveying device 2 can include a container for holding the precursor liquid, a peristaltic pump, and a flow meter, etc., to precisely control the feed rate of the precursor. By spraying the precursor and the synchronous combustion of the flame, the liquid components in the precursor can be evaporated, thereby generating nanoparticles.
[0037] Gas delivery device 3 is connected to gas inlet 102, which is used to inject the reaction gas to flame generating component 101. Multiple gas pipelines can be selected according to actual needs. It can also include a gas mixer that can uniformly mix multiple reaction gases to ensure reaction stability. For example, air pipeline, oxygen pipeline, methane pipeline or nitrogen pipeline can be used. In some cases, two or more pipelines can be opened at the same time to deliver multiple gases to the location of flame generating component 101 simultaneously. Methane and oxygen are combustion gas and combustion-supporting gas, respectively. They are introduced first, and pure oxygen, oxygen + air or air can be introduced later according to production conditions. For highly reactive precursors that require stability, nitrogen can be selectively introduced during nanopowder production.
[0038] The nanopowder collection device 4 is connected to the nanopowder outlet of the synthesis reactor 1 and to the negative pressure generating device 5. In this case, the negative pressure environment formed inside it can adsorb the nanopowder from the synthesis reactor 1 into the nanopowder collection device 4 and adsorb and collect it. This can prevent the powder from clogging the pipe and will not form the powder aggregate or agglomeration.
[0039] The sealed container 6 is fitted around the outside of the synthesis reactor 1, which effectively isolates it from the external environment. This prevents the generated nanoparticles from being affected by dust, moisture, or cross-contamination with other powders. It also prevents the powder inside the synthesis equipment from spreading outside and contaminating other powders, thus effectively improving the purity and quality of the powder. Furthermore, multiple powder synthesis devices can be set up in the same space, which helps to increase the yield of nanoparticles. For synthesizing water-absorbing and easily deteriorated magnesium-containing products, such as magnesium aluminum spinel, this sealed structure can also provide waterproofing and moisture protection. Moreover, this sealed environment can reduce noise interference to the surrounding environment, making the working environment quieter.
[0040] As can be seen from the above technical solution, in the embodiment of the above-mentioned nanopowder gas-phase synthesis equipment provided by this utility model, since it includes a synthesis reactor with a flame generating component inside, and also has a gas inlet and a precursor injection device facing the flame generating component; a precursor conveying device connected to the precursor injection device, the precursor injection device is used to inject the precursor to the flame generating component; a gas conveying device connected to the gas inlet, the gas inlet is used to inject the reaction gas to the flame generating component; a nanopowder collecting device connected to the nanopowder outlet of the synthesis reactor and connected to the negative pressure generating device, the internal negative pressure formed by the negative pressure generating device can adsorb the generated nanopowder into the nanopowder collecting device. Since it includes a sealed container fitted around the synthesis reactor, it achieves the functions of sound insulation and noise reduction, prevention of powder contamination and improvement of product purity. Thus, it can be seen that the above-mentioned equipment adopts a bottom-up gas-phase flame one-step synthesis method to generate nanopowder, which can improve the reaction rate, improve the purity and particle size uniformity of the product, and realize the efficient production of large-scale nanopowder.
[0041] Continue to refer to Figure 1 In a specific embodiment of the above-mentioned nanopowder gas-phase synthesis equipment, a temperature detection device 7 may also be included. The temperature detection end is located inside the synthesis reactor, and the temperature data transmission end is located outside the sealed container. Specifically, the temperature detection end is... Figure 1 The temperature detection device 7 is located on the left side of the reactor. By placing it inside the synthesis reactor, it can measure the internal temperature, allowing operators to know this temperature and provide a basis for adjusting the synthesis reaction. The temperature data transmission terminal is... Figure 1 The temperature detection device 7 is located on the right side of the sealed container. This avoids the effects of high temperatures, extends its lifespan, and allows the obtained temperature data to be transmitted to the outside and displayed using corresponding components. This enables operators to know the real-time temperature inside the synthesis reactor from the outside, making it easier to quickly adjust relevant reaction parameters.
[0042] Furthermore, the nanopowder gas-phase synthesis equipment may also include a real-time pressure monitoring device 8, with the pressure monitoring end located inside the synthesis reactor and the pressure data transmission end located outside the sealed container. It should be noted that, as... Figure 1 As shown, the pressure monitoring end is the left side of the real-time pressure monitoring device 8, which can extend into the interior of the synthesis reactor to measure the real-time pressure inside the reactor. The pressure data transmission end is the right side of the real-time pressure monitoring device 8, which extends to the outside of the sealed container 6 to display the pressure to the operator, making it easier for the operator to understand the real-time pressure inside the synthesis reactor. Specifically, the pressure can be displayed using a pressure gauge or on a relevant screen; there are no restrictions here.
[0043] Further, continue to refer to Figure 1 The aforementioned nanopowder gas-phase synthesis equipment may further include:
[0044] Control device 9 is also communicatively connected to gas conveying device 3, precursor conveying device 2, negative pressure generating device 5, temperature detection device 7, and real-time pressure monitoring device 8 (e.g., Figure 1 As shown by the dotted line, the control device 9 is used to adjust the negative pressure value of the negative pressure generating device 5, the gas supply of the gas conveying device 3, the corresponding gas flow rate, and the feeding speed of the precursor conveying device 2 according to the temperature and real-time pressure. Specifically, this control device 9 can control the reaction process in real time to avoid abnormal reactions. Moreover, when the reaction has progressed to a certain extent, the control system can shut down the negative pressure generating device 5, the gas conveying device 3, and the precursor conveying device 2 to pause or stop the reaction. When the reaction needs to start, it can control these devices to restart. It can be seen that this can be quickly turned on or off with just one command from the operator, which is more efficient.
[0045] The display device 10, which is communicatively connected to the control device 9, can be installed outside the sealed container 6 to display real-time temperature and real-time pressure. It should be noted that this display device can be connected to a PLC control system to display parameters such as temperature and real-time pressure on a relevant LED screen. It can also realize digital control and remote monitoring of the electrical cabinet.
[0046] In another specific embodiment of the above-mentioned nanopowder gas phase synthesis equipment, a flame observation window 11 may also be included, comprising a first observation part 1101 located on the side of the synthesis reactor 1 facing the flame generating component, and a second observation part 1102 located on the side of the sealed container 6 corresponding to the position of the first observation part 1101. The two are located at the same height. With this structure, the operator can easily observe the flame combustion reaction directly from the outside, and adjust the reaction parameters in a timely manner according to the real-time situation of the flame to avoid abnormal reaction. Furthermore, the flame status can be monitored in real time by connecting to the PLC control system through a camera system, and the abnormality can be dealt with quickly to avoid the abnormality lasting too long.
[0047] In another specific embodiment of the above-mentioned nanopowder gas phase synthesis equipment, it may also include a powder synthesis observation window 12, including a third observation part 1201 located on the side of the synthesis reactor 1 at a preset height above the flame generating component, and a fourth observation part 1202 located on the side of the sealed container 6 corresponding to the position of the third observation part 1201. The two are located at the same height, so that the operator can easily observe the powder synthesis situation from the outside.
[0048] In a preferred embodiment of the above-mentioned nanopowder gas phase synthesis equipment, the synthesis reactor 1 and the nanopowder collecting device 4 can be connected by a quick-connect chuck 13. This allows for quick connection and fixation via clamps, claws, or other clamping devices. Specifically, the clamp can be sealed using elastic gaskets or O-rings inside the clamp. The clamp is fixed to the chuck, and the pipe is clamped by locking screws. This method has the advantages of simple operation, good sealing, and quick loading and unloading, and is easy to disassemble and clean. Of course, other connection methods can be selected according to actual needs, and there are no restrictions here.
[0049] In another preferred embodiment of the above-described nanopowder gas-phase synthesis equipment, the nanopowder collecting device 4 may include:
[0050] Collector 401, the internal space of which can accommodate the prepared nanopowder;
[0051] The filter cartridge 402 is disposed inside the collector 401 and includes a stainless steel frame and a high-temperature resistant filter bag sleeved on the outside of the stainless steel frame. This high-temperature resistant filter bag is used to adsorb nanoparticles in the presence of negative pressure. In this case, the filter cartridge 402 has a collection function. The negative pressure causes the nanoparticles to be adsorbed from the reaction chamber into the collector 401 and onto the high-temperature resistant filter bag. Moreover, the number of filter cartridges 402 can be selected according to actual needs. Generally, the number is preferably greater than 8 to improve the adsorption effect of nanoparticles.
[0052] The blowing component 403, located at the top of the collector 401 and connected to the filter cartridge 402, is used to blow away the nanoparticles adsorbed on the surface of the high-temperature resistant filter bag when the negative pressure is closed, thereby achieving the collection of nanoparticles and cleaning of the filter bag. This enables automated material collection and filter bag cleaning, facilitating large-scale production. In other words, the blowing component 403 can blow air into the filter cartridge 402 to blow away the nanoparticles adsorbed on the outside of the high-temperature resistant filter bag, causing them to fall below, thus achieving the collection effect. Furthermore, the aforementioned negative pressure generating device 5 can preferably be a negative pressure fan. During the reaction in the synthesis device, the negative pressure fan is turned on to create a micro-negative pressure in the collector and the synthesis reactor. This method is low-cost, easy to operate, and can achieve automated control, thus improving production efficiency. Of course, other devices can also be selected according to actual needs, and there are no restrictions here. Furthermore, the aforementioned precursor injection device 103 is preferably a flat nozzle or an outward-protruding nozzle to improve the uniformity of the injection. The size of the nozzle orifice can be between 0.5mm and 1.5mm. Of course, other types and sizes of nozzles can also be selected according to actual needs, which is not limited here.
[0053] The receiving hopper 404 is placed directly below the collector 401 and can be connected to the collector 401 via a quick-connect device, for storing the nanoparticles collected by the collector 401 during the micro-negative pressure collection and blowing process.
[0054] In summary, the above-mentioned gas-phase synthesis equipment for nanopowders has the following advantages:
[0055] (1) High-efficiency production: The gas-phase flame synthesis method is adopted, which has a fast reaction rate and is suitable for mass production.
[0056] (2) Controllable particle size: By precisely controlling the reaction conditions, spinel powder with a particle size of less than 100 nm can be produced.
[0057] (3) Uniform doping: It can achieve uniform doping at the atomic level and improve the performance of powder.
[0058] (4) Large-scale production: Daily output can reach tens of kilograms, suitable for industrial production.
[0059] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A gas-phase synthesis device for nanopowders, characterized in that, include: The synthesis reactor is equipped with a flame generating component inside, and also has a gas inlet and a precursor injection device facing the flame generating component; A precursor delivery device is connected to the precursor injection device, which is used to inject the precursor into the flame generating component; A gas delivery device is connected to the gas inlet, which is used to inject the reaction gas into the flame generating component; The nanoparticle collection device is connected to the nanoparticle outlet of the synthesis reactor and also connected to the negative pressure generating device. A sealed container is fitted around the outside of the synthesis reactor.
2. The nanopowder gas-phase synthesis equipment according to claim 1, characterized in that, Also includes: A temperature detection device is provided, with the temperature detection end located inside the synthesis reactor and the temperature data transmission end located outside the sealed container.
3. The nanopowder gas-phase synthesis equipment according to claim 2, characterized in that, Also includes: A real-time pressure monitoring device is provided, with the pressure monitoring end located inside the synthesis reactor and the pressure data transmission end located outside the sealed container.
4. The nanopowder gas-phase synthesis equipment according to claim 3, characterized in that, Also includes: The control device is also communicatively connected to the gas conveying device, the precursor conveying device, the negative pressure generating device, the temperature detection device, and the real-time pressure monitoring device, and is used to adjust the negative pressure value of the negative pressure generating device, the flow rate of the gas conveying device, and the feeding speed of the precursor conveying device according to the temperature and real-time pressure. A display device, which is communicatively connected to the control device, is located outside the sealed container and is used to display real-time temperature and real-time pressure.
5. The nanopowder gas-phase synthesis equipment according to claim 1, characterized in that, Also includes: The flame observation window includes a first observation section located on the side of the synthesis reactor and facing the flame generating component, and a second observation section located on the side of the sealed container and corresponding to the position of the first observation section.
6. The nanopowder gas-phase synthesis equipment according to claim 1, characterized in that, Also includes: The powder synthesis observation window includes a third observation section located on the side of the synthesis reactor at a preset height above the flame generating component, and a fourth observation section located on the side of the sealed container corresponding to the position of the third observation section.
7. The nanopowder gas-phase synthesis equipment according to claim 1, characterized in that, The synthesis reactor and the nanopowder collecting device are connected by a quick-connect chuck.
8. The nanopowder gas-phase synthesis equipment according to claim 1, characterized in that, The nanopowder collecting device includes: Collectors; A filter cartridge, disposed inside the collector, includes a stainless steel frame and a high-temperature resistant filter bag fitted over the outside of the stainless steel frame. The high-temperature resistant filter bag is used to adsorb nanoparticles in the presence of negative pressure. A blowing component is disposed on the top of the collector and communicates with the filter cartridge, used to blow away the nanoparticles adsorbed on the surface of the high-temperature resistant filter bag when the negative pressure is closed; A receiving hopper, located at the bottom of the collector, is used to collect nanoparticles.
9. The nanopowder gas-phase synthesis equipment according to claim 1, characterized in that, The negative pressure generating device is a negative pressure fan.
10. The nanopowder vapor phase synthesis equipment according to claim 1, characterized in that, The precursor injection device is a flat nozzle or an outward-protruding nozzle.