Atomization generating device and spray pyrolysis apparatus

Abstract

The utility model discloses a kind of atomization generating device and spray pyrolysis equipment, atomization generating device includes fog making cavity upper cover, the cylindrical adapter of being communicated with quartz tube in high-temperature tubular furnace is set on fog making cavity upper cover;Fog making cavity upper cover is sealedly connected fog making cavity barrel by connecting structure, the fog making cavity barrel is provided with multiple air inlet pipes for controlling airflow rate in cavity, which are communicated with gas cylinder, the inner chamber bottom of the fog making cavity barrel is provided with multiple fog maker.Equipment for spray pyrolysis includes atomization generating device, the quartz tube in high-temperature tubular furnace is communicated with the atomization generating device, and the other end of the quartz tube is communicated with electrostatic collection device.The utility model solves the problem that raw material is wasted and polluted due to the insufficient airtightness of the existing atomization generating device, the airflow and atomization matching are poor, the reaction is damaged, the product quality is restricted, the visibility and maintainability are weak, and the operation and maintenance cost is increased.

Description

Technical Field

[0001] This utility model belongs to the field of spray pyrolysis, specifically relating to an atomization generating device and a spray pyrolysis equipment. Background Technology

[0002] Electronic packaging places stringent requirements on the inorganic fillers in epoxy molding compounds, demanding high moisture resistance and low stress. Spherical fillers are an ideal choice due to their high filler ratio and low stress concentration. However, existing mainstream spherical silicon micropowders suffer from complex preparation, high energy consumption, low thermal conductivity, and thermal expansion coefficient mismatch, easily leading to device delamination and cracking. Spray pyrolysis can prepare spherical and hollow Cu2V2O7 structures that match the resin's thermal expansion coefficient, potentially solving the thermal expansion mismatch problem, improving packaging reliability, reducing production costs, and driving the development of electronic packaging technology. Spray pyrolysis is a material preparation technology that utilizes a two-step process of atomization and pyrolysis. The principle involves first converting a precursor solution containing the target product element (such as a metal salt solution) into micron- to nanometer-sized droplets through an atomization unit. These droplets, carried by a carrier gas, enter a high-temperature reactor and undergo continuous processes such as solvent evaporation, solute decomposition, chemical reaction, and particle formation within a short time, ultimately generating a solid powder or film with specific composition, morphology, and particle size distribution.

[0003] Many existing spray pyrolysis devices, mainly consisting of atomizing components, gas path systems, connecting structures, atomizing chambers, outer shells and support structures, high-temperature furnaces, and collection devices, suffer from defects in key performance and structural design. The connecting structures often use direct threaded connections or rigid sleeve joints, lacking flexible sealing structures. This results in insufficient precision in controlling the mist output during atomization, poor airtightness at device connections, leading to easy droplet leakage, material loss, and environmental pollution. Furthermore, the lack of a coordinated mechanism between airflow rate and atomization process makes control difficult, directly impacting reaction continuity. Moreover, most devices use air inlets perpendicular to the mist delivery pipe axis, an unreasonable design that causes gas to impact the mist flow at a 90° angle, easily inducing local eddies, disrupting the uniform distribution of droplets, significantly reducing the stability and uniformity of droplet delivery, ultimately making it difficult to guarantee the consistency of pyrolysis product quality and hindering product quality improvement. Additionally, the equipment often uses opaque materials, resulting in poor visibility, and its high degree of structural integration makes fault repair and component replacement inconvenient, further increasing maintenance costs and downtime. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, the present invention aims to provide an atomization generating device and a spray pyrolysis equipment, which solves the problems of insufficient air tightness leading to raw material waste and pollution, poor matching between airflow and atomization causing reaction disruption, restricting product quality, poor visibility and maintainability, and increasing operation and maintenance costs in existing atomization generating devices.

[0005] This utility model is achieved through the following technical solution:

[0006] Atomizing device includes a top cover for a mist-generating chamber, the top cover of which is provided with a cylindrical adapter that communicates with a quartz tube in a high-temperature tube furnace; the top cover of the mist-generating chamber is sealed to the body of the mist-generating chamber through a connecting structure, the body of the mist-generating chamber is provided with multiple air inlet pipes that communicate with gas cylinders for regulating the airflow rate inside the chamber, and multiple mist generators are provided at the bottom of the inner cavity of the body of the mist-generating chamber.

[0007] Furthermore, the connection structure includes flanges respectively disposed at the connection between the upper cover of the mist-generating chamber and the cylinder body of the mist-generating chamber, and a rubber sealing gasket is disposed between the two flanges and fixed by bolts.

[0008] Furthermore, the top cover and the body of the fog-generating chamber are made of acrylic material, and the top cover and the body of the fog-generating chamber are sealed together to form a transparent chamber.

[0009] Furthermore, the other end of the quartz tube in the high-temperature tubular furnace is connected to an electrostatic collection device.

[0010] Furthermore, the air inlet is inclined, and the end near the body of the mist-generating chamber is lower in height.

[0011] Furthermore, two air inlet pipes are symmetrically arranged on the left and right sides of the mist generating chamber body.

[0012] Furthermore, there are no fewer than three fog generators.

[0013] A spray pyrolysis device includes the aforementioned atomizing device, wherein the atomizing device is connected to a quartz tube in a high-temperature tubular furnace, and the other end of the quartz tube is connected to an electrostatic collection device.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention utilizes multiple air inlet pipes connected to gas cylinders in the body of the mist-generating chamber, along with multiple mist generators at the bottom of the inner chamber, to achieve adjustable mist volume and flow rate, optimize airflow and atomization matching, improve droplet distribution, and avoid the situation in existing equipment where poor airflow-atomization matching disrupts the reaction and restricts product quality.

[0016] The present invention utilizes a connection structure of flange, bolts, and rubber sealing gaskets between the top cover of the mist-generating chamber and the body of the mist-generating chamber to improve the airtightness of the equipment and solve the problem of raw material waste and pollution caused by insufficient airtightness of existing equipment.

[0017] This invention utilizes a transparent cavity design made of acrylic material combined with a modular and detachable structure to facilitate observation of the fogging process and equipment maintenance, thereby reducing operation and maintenance costs.

[0018] The spray pyrolysis equipment provided by this invention can achieve high-quality preparation of spherical and hollow spherical negative thermal expansion materials. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a cross-sectional view of the present invention;

[0021] In the diagram: 1. Top cover of the mist-generating chamber; 2. Cylindrical adapter; 3. Connecting structure; 4. Body of the mist-generating chamber; 5. Air inlet pipe; 6. Mist generator; 7. Rubber sealing gasket. Detailed Implementation

[0022] 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.

[0023] To address the shortcomings of existing spray pyrolysis equipment in key performance and structural aspects such as mist control, airflow atomization coordination, and air inlet pipe design, which lead to raw material loss, unstable product quality, and increased operation and maintenance costs and downtime due to material and integration issues, this utility model provides an atomization generating device and spray pyrolysis equipment.

[0024] like Figure 1 As shown, an atomizing device includes a mist-generating chamber cover 1, a cylindrical adapter 2, a connecting structure 3, a mist-generating chamber body 4, an air inlet pipe 5, a mist generator 6, and a rubber sealing gasket 7. The mist-generating chamber cover 1 is provided with a cylindrical adapter 2 that communicates with a quartz tube in a high-temperature tube furnace. The mist-generating chamber cover 1 is sealed to the mist-generating chamber body 4 through the connecting structure 3. The connecting structure 3 includes flanges respectively disposed at the connection points of the mist-generating chamber cover 1 and the mist-generating chamber body 4, with a rubber sealing gasket 7 disposed between the two flanges and fixed by bolts. Two air inlet pipes 5, which communicate with gas cylinders, are symmetrically arranged on the left and right sides of the mist-generating chamber body 4 for regulating the airflow rate within the chamber. Multiple mist generators 6 are disposed at the bottom of the inner cavity of the mist-generating chamber body 4.

[0025] Both the top cover 1 and the body 4 of the mist-generating chamber are made of acrylic material, and are sealed together to form a transparent chamber. This transparent chamber design, combined with a modular and detachable structure, facilitates observation of the mist-generating process, aids in equipment maintenance, and reduces operating costs.

[0026] The air inlet 5 is inclined, and the end near the mist-generating chamber body 4 is lower in height. The inclination angle guides the airflow to flow smoothly along the inner wall of the pipe, avoiding the eddies generated when the airflow directly impacts the pipe wall during vertical air intake.

[0027] There are no fewer than three fog generators 6. Activating the fog generators 6 atomizes the precursor solution, which can achieve a large amount of fog. The fog generating chamber cylinder 4 has two side air inlet pipes 5. By introducing nitrogen, the amount of fog and the flow rate can be adjusted, optimizing the airflow and atomization matching, improving the droplet distribution, and further improving the product quality.

[0028] In use, the precursor solution is placed into the cylinder 4 of the mist-generating chamber. When the liquid level reaches the preset value, the top cover 1 of the mist-generating chamber is closed. The chamber is connected and sealed using the connecting structure 3. The cylindrical adapter 2 fixed to the top cover 1 of the mist-generating chamber is connected to the quartz tube in the high-temperature tube furnace, ensuring airtightness, reducing raw material waste, and protecting the surrounding environment. The mist generator 6 is started to atomize the precursor solution, and nitrogen is introduced into the air inlet pipe 5 to optimize the airflow and atomization matching.

[0029] A spray pyrolysis device, wherein the atomizing device is connected to a quartz tube in a high-temperature tubular furnace, and the other end of the quartz tube is connected to an electrostatic collection device.

[0030] The specific process for preparing spherical and hollow Cu2V2O7 using the spray pyrolysis equipment provided by this invention is as follows:

[0031] The Cu2V2O7 precursor solution is placed into the body 4 of the mist-generating chamber. When the liquid level reaches the preset value, the top cover 1 of the mist-generating chamber is covered. The chamber is connected and sealed using the connecting structure 3. The cylindrical adapter 2 fixed to the top cover 1 of the mist-generating chamber is connected to the glass tube of the high-temperature furnace. The mist generator 6 is started to generate mist. Nitrogen gas is introduced from the side air inlet pipe 5. The atomized droplets enter the quartz tube in the high-temperature tube furnace from the cylindrical adapter 2. The residence time of the droplets in the quartz tube is controlled by the nitrogen gas flow rate. After high-temperature firing, the droplets are generated into spherical or hollow spherical negative thermal expansion materials, which are then collected by the electrostatic collection device.

Claims

1. An atomizing device, characterized in that, The system includes a mist-generating chamber cover (1), on which a cylindrical adapter (2) is provided to communicate with a quartz tube in a high-temperature tube furnace; the mist-generating chamber cover (1) is sealed to the mist-generating chamber body (4) through a connecting structure (3); the mist-generating chamber body (4) is provided with multiple air inlet pipes (5) that communicate with gas cylinders for regulating the airflow rate in the chamber; and multiple mist generators (6) are provided at the bottom of the inner cavity of the mist-generating chamber body (4).

2. The atomizing device according to claim 1, characterized in that, The connection structure (3) includes flanges respectively set at the connection between the upper cover (1) of the mist-generating chamber and the cylinder body (4) of the mist-generating chamber, and a rubber sealing gasket (7) is set between the two flanges and fixed by bolts.

3. The atomizing device according to claim 1, characterized in that, The top cover (1) and the body (4) of the fog-generating chamber are made of acrylic material. The top cover (1) and the body (4) of the fog-generating chamber are sealed together to form a transparent chamber.

4. The atomizing device according to claim 1, characterized in that, The other end of the quartz tube in the high-temperature tubular furnace is connected to an electrostatic collection device.

5. The atomizing device according to claim 1, characterized in that, The air inlet pipe (5) is inclined and the end near the mist generating chamber body (4) is lower in height.

6. The atomizing device according to claim 1, characterized in that, Two air inlet pipes (5) are symmetrically arranged on the left and right sides of the cylinder body (4) of the mist generating chamber.

7. The atomizing device according to claim 1, characterized in that, There shall be no fewer than three fog generators (6).

8. A spray pyrolysis apparatus characterized by, The device includes the atomizing device described in any one of claims 1-7 above, wherein the atomizing device is connected to a quartz tube in a high-temperature tube furnace, and the other end of the quartz tube is connected to an electrostatic collection device.

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