An atomized opposed flow catalyst preparation device

Abstract

The utility model belongs to chemical device technical field provides a kind of atomization collision flow type catalyst preparation device, including first raw material tank, second raw material tank, first reaction liquid buffer tank, second reaction liquid buffer tank, reaction tank, first air compressor and second air compressor;The first raw material tank is connected with the reaction tank by the first reaction liquid buffer tank, the second raw material tank is connected with the reaction tank by the second reaction liquid buffer tank, the first air compressor and the second air compressor are all connected to the bottom of the reaction tank;Device is dispersed to raw material by ultrasonic disperser, avoids the problem that reactant gathers and concentration is not uniform.Simultaneously the feeding mode of high-pressure spray makes two air flows to collide quickly, strengthens mixing process, is beneficial to the rapid nucleation of catalyst nanoparticle, reduces reunion phenomenon;Simultaneously reduce the attachment and aggregation of particle in pipeline, reduce the risk of pipeline blockage.

Description

Technical Field

[0001] This utility model relates to the field of chemical apparatus technology, and more specifically, to an atomized collision flow catalyst preparation apparatus. Background Technology

[0002] Existing catalyst preparation technologies include impregnation, coprecipitation, and hydrothermal methods. Impregnation involves immersing a porous support in a precursor solution of the active component, followed by drying, calcination, and reduction to load the active component onto the support surface. However, improper process control can easily lead to uneven component distribution. Coprecipitation involves co-precipitating a metal salt precursor to form a homogeneous mixture, followed by aging, washing, and calcination to prepare the catalyst. However, this process is complex and prone to component loss or phase separation. Hydrothermal methods involve treating the precursor solution at high temperatures in a high-pressure reactor to allow the active component to crystallize and grow, producing nanocatalysts with controllable morphology and high crystallinity. However, this method requires sophisticated equipment, harsh reaction conditions, consumes a lot of energy, has low yield, and rapid crystallization can lead to structural defects. Furthermore, catalysts synthesized via impregnation, coprecipitation, and hydrothermal methods often exhibit nanoparticle agglomeration, resulting in a wide particle size distribution and small specific surface area. Additionally, nanoparticles can easily adhere to pipe walls, clogging the pipeline and affecting catalyst activity.

[0003] Therefore, there is a need to provide an atomized collision flow catalyst preparation device to solve the problems of uneven reaction liquid concentration distribution and catalyst particle agglomeration in existing catalyst preparation devices. Utility Model Content

[0004] The purpose of this invention is to provide an atomized collision flow catalyst preparation device to solve the above-mentioned problems in the prior art.

[0005] The technical solution of this utility model is as follows:

[0006] An atomized collision flow catalyst preparation apparatus includes a first raw material tank, a second raw material tank, a first reaction liquid buffer tank, a second reaction liquid buffer tank, a reaction tank, a first air compressor, and a second air compressor; the first raw material tank is connected to the reaction tank through the first reaction liquid buffer tank, the second raw material tank is connected to the reaction tank through the second reaction liquid buffer tank, and both the first air compressor and the second air compressor are connected to the bottom of the reaction tank;

[0007] The reaction vessel is provided with a first high-pressure atomizing nozzle at the connection between the reaction vessel and the first reaction liquid buffer tank, and a second high-pressure atomizing nozzle is provided at the connection between the reaction vessel and the second reaction liquid buffer tank. Both the first high-pressure atomizing nozzle and the second high-pressure atomizing nozzle are located at the top of the reaction vessel.

[0008] Furthermore, a demister is also provided on the top of the reaction vessel.

[0009] Furthermore, the first high-pressure atomizing nozzle and the second high-pressure atomizing nozzle are arranged symmetrically.

[0010] Furthermore, the first raw material tank is connected to a first ultrasonic disperser, and the second raw material tank is connected to a second ultrasonic disperser.

[0011] Furthermore, a stirrer is provided inside the reaction vessel, and the stirrer is located at the bottom of the reaction vessel.

[0012] Furthermore, the bottom of the reaction vessel is provided with a first air inlet and a second air inlet, the top of the reaction vessel is provided with a first air outlet, and the side wall of the reaction vessel is provided with a second air outlet.

[0013] Furthermore, the first air compressor is connected to a first heating unit, and the first air compressor is connected to the first air inlet through the first heating unit; the second air compressor is connected to a second heating unit, and the second air compressor is connected to the second air inlet through the second heating unit.

[0014] Furthermore, the bottom of the reaction vessel is provided with a discharge port, which is connected to a discharge valve.

[0015] In summary, this utility model has the following beneficial effects:

[0016] The device provided by this invention disperses raw materials using an ultrasonic disperser, avoiding the problems of reactant aggregation and uneven concentration caused by solid feed. At the same time, the high-pressure spray feeding method causes the two air streams to collide rapidly, enhancing the mixing process and forming a uniform high-supersaturation reaction environment, which is conducive to the rapid nucleation of catalyst nanoparticles and reduces agglomeration. It also reduces the adhesion and aggregation of particles in the pipeline, reducing the risk of pipeline blockage.

[0017] Furthermore, the demister installed at the top of the reaction vessel can separate liquid droplets entrained in the gas in the tower, ensuring gas purity, protecting downstream equipment, and guaranteeing mass transfer efficiency; the agitator installed at the bottom of the reaction vessel can crush and refine the catalyst particles falling to the bottom of the reaction vessel, preventing particle agglomeration. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

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

[0020] Figure 2 This is a top view of the reaction vessel provided by this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the first high-pressure atomizing nozzle provided by this utility model.

[0022] Legend: 1-First raw material tank; 2-First ultrasonic disperser; 3-First reaction liquid buffer tank; 4-Reaction tank; 41-First air outlet; 42-Demister; 43-First high-pressure atomizing nozzle; 431-Liquid inlet; 432-First air inlet; 433-Second air inlet; 434-Pressure chamber; 435-Nozzle; 44-Second high-pressure atomizing nozzle; 45-Second air outlet; 46-First air inlet; 47-Second air inlet; 48-Agitator; 5-Second raw material tank; 6-Second ultrasonic disperser; 7-Second reaction liquid buffer tank; 8-First air compressor; 9-First heating unit; 10-Discharge valve; 11-Second heating unit; 12-Second air compressor. Detailed Implementation

[0023] In the description of this utility model, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. It should be noted that if the terms "first," "second," etc., are used in the specification, claims, and the above-mentioned drawings of this utility model, they are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0024] Example

[0025] The present invention will be further described in detail below with reference to the accompanying drawings.

[0026] This utility model provides an atomized collision flow catalyst preparation device, including a first raw material tank 1, a second raw material tank 5, a first reaction liquid buffer tank 3, a second reaction liquid buffer tank 7, a reaction tank 4, a first air compressor 8, and a second air compressor 12; the first raw material tank 1 is connected to the reaction tank 4 through the first reaction liquid buffer tank 3, the second raw material tank 5 is connected to the reaction tank 4 through the second reaction liquid buffer tank 7, and the first air compressor 8 and the second air compressor 12 are both connected to the bottom of the reaction tank 4;

[0027] The reaction tank 4 is connected to the first reaction liquid buffer tank 3 with a first high-pressure atomizing nozzle 43, and the reaction tank 4 is connected to the second reaction liquid buffer tank 7 with a second high-pressure atomizing nozzle 44. Both the first high-pressure atomizing nozzle and the second high-pressure atomizing nozzle 44 are located on the top of the reaction tank 4.

[0028] Furthermore, a demister 42 is also installed on the top of the reaction vessel 4.

[0029] The function of demister 42 is to separate liquid droplets entrained in the gas inside reaction vessel 4 to ensure mass transfer efficiency and protect downstream equipment from interference and damage caused by droplets. No specific type of demister 42 is specified here; any demister that meets the application requirements is acceptable.

[0030] Furthermore, the first high-pressure atomizing nozzle 43 and the second high-pressure atomizing nozzle 44 are arranged symmetrically.

[0031] In this embodiment, the symmetrically arranged first high-pressure atomizing nozzle 43 and second high-pressure atomizing nozzle 44 enable the two droplets to collide with each other at the same speed and angle, forming a uniform, highly supersaturated reaction environment. This promotes rapid nucleation of catalyst particles and inhibits agglomeration. Simultaneously, the symmetrical arrangement helps to create a stable flow field, allowing droplets to nucleate rapidly after collision, improving the efficiency and stability of catalyst preparation. Furthermore, the symmetrical arrangement facilitates the optimization and adjustment of parameters such as nozzle spacing, angle, and pressure to adapt to different reaction requirements and catalyst formulations.

[0032] The working principle of the high-pressure atomizing nozzle is as follows:

[0033] The first high-pressure atomizing nozzle 43 has a liquid inlet 431 at the top, a first air inlet 432 and a second air inlet 433 on the side wall, a pressure chamber 434 inside the first high-pressure atomizing nozzle 43, and a nozzle 435 at the bottom of the first high-pressure atomizing nozzle 43.

[0034] Liquid is fed into pressure chamber 434 through liquid inlet 431, and air is fed into pressure chamber 434 through first air inlet 432 and second air inlet 433. By increasing the gas pressure or decreasing the liquid pressure, fine droplet spray can be obtained. The atomized droplets are ejected from nozzle 435. The oppositely ejected droplets collide with each other and undergo liquid micro-element precipitation reaction.

[0035] Furthermore, by adjusting the gas or liquid pressure, the atomization effect of the high-pressure atomizing nozzle can be controlled, resulting in finer droplets. Specifically, increasing the gas pressure enhances the shearing and impact force of the gas on the liquid, making it easier for the liquid to break into smaller droplets; conversely, decreasing the liquid pressure reduces the liquid's inertia, making it easier for the gas to break the liquid into smaller droplets. This fine droplet spray can better promote gas-liquid mixing and reactions.

[0036] Furthermore, the first raw material tank 1 is connected to the first ultrasonic disperser 2, and the second raw material tank 5 is connected to the second ultrasonic disperser 6.

[0037] Ultrasonic dispersers utilize the cavitation effect of ultrasound to cause bubbles in a liquid to collapse instantaneously, generating localized high temperatures, high pressures, and strong shock waves. These extreme physical conditions effectively disrupt the agglomeration forces between particles, dispersing them uniformly in the solution. In the process of catalyst preparation, ultrasonic dispersion devices can prevent particle agglomeration, forming a stable suspension, thereby improving the uniformity and stability of the product.

[0038] Furthermore, a stirrer 48 is provided inside the reaction vessel 4, and the stirrer 48 is located at the bottom of the reaction vessel 4.

[0039] In this embodiment, the generated catalyst particles fall continuously inside the reaction vessel 4. When they fall to the bottom of the reaction vessel 4, the agitator 48 installed at the bottom of the reaction vessel 4 uses the mechanical shear force and turbulence effect generated by its high-speed rotation to cause the catalyst particles to undergo a process of breaking, colliding and breaking again in sequence, effectively breaking and refining the catalyst particles, preventing them from agglomerating, thereby significantly improving the dispersion and specific surface area of ​​the particles.

[0040] Furthermore, the control over particle size can be further enhanced by adjusting the rotation speed of the stirrer 48, making it adaptable to the needs of different catalyst formulations and application scenarios.

[0041] The mixer 48 is existing technology. Common mixers 48 such as spiral mixers 48 can be selected to meet the usage requirements, and will not be further explained here.

[0042] Furthermore, the bottom of the reaction vessel 4 is provided with a first air inlet 46 and a second air inlet 47, the top of the reaction vessel 4 is provided with a first air outlet 41, and the side wall of the reaction vessel 4 is provided with a second air outlet 45.

[0043] Furthermore, the first air compressor 8 is connected to the first heating unit 9, and the first air compressor 8 is connected to the first air inlet 46 through the first heating unit 9; the second air compressor 12 is connected to the second heating unit 11, and the second air compressor 12 is connected to the second air inlet 47 through the second heating unit 11.

[0044] The first air compressor 8 and the second air compressor 12 are responsible for providing protective gas, which is also the power source for the gas flow inside the reaction vessel 4. After pressurizing the gas, the first air compressor 8 and the second air compressor 12 deliver it through pipelines to the first heating unit 9 and the second heating unit 11. The heating units heat the compressed gas to a specific temperature to meet the specific temperature requirements inside the reaction vessel 4. The heated gas not only helps to increase the reaction rate but also prevents problems caused by excessively low temperatures during the reaction process, such as catalyst particle agglomeration or incomplete reaction.

[0045] The heated gas flows out from the outlet of the heating unit through a pipe and enters the reaction tank 4 through the first air inlet 46 and the second air inlet 47. Inside the reaction tank 4, the gas meets the droplets sprayed from the atomizing nozzle, promoting further atomization and mixing of the droplets, thereby forming tiny droplets, providing ideal conditions for the nucleation and growth of the catalyst.

[0046] In addition, the design of the first gas outlet 41 and the second gas outlet 45 also takes into account the discharge of gas inside the reaction vessel 4; small molecule byproducts and reaction heat generated during the reaction can be discharged through the gas outlets to avoid accumulation inside the reaction vessel 4, thereby maintaining the stability of the internal environment of the reaction vessel 4 and ensuring the continuity and efficiency of the catalyst preparation process.

[0047] It should be noted that in this embodiment, both the first air compressor 8 and the second air compressor 12 deliver nitrogen gas.

[0048] Furthermore, a discharge port is provided at the bottom of the reaction vessel 4, and a discharge valve 10 is connected to the discharge port.

[0049] The workflow of this utility model is as follows:

[0050] First, appropriate amounts of metal salt and deionized water are added to the first raw material tank 1 and the second raw material tank 5, respectively. Then, the mixed solution formed by the metal salt and deionized water is dispersed by the first ultrasonic disperser 2 and the second ultrasonic disperser 6 to obtain a uniformly mixed metal salt precursor solution.

[0051] Subsequently, the metal salt precursor solution is stored in the first reaction buffer tank 3 and the second reaction buffer tank 7 through pipelines. Then, according to the required ratio, the metal salt precursor solution in the first reaction buffer tank 3 and the second reaction buffer tank 7 is sent into the reaction tank 4 through the first high-pressure atomizing nozzle 43 and the second high-pressure atomizing nozzle 44 for reaction. The high-pressure atomizing nozzles atomize the metal salt precursor solution, and the oppositely ejected droplets collide with each other and undergo a liquid micro-element precipitation reaction.

[0052] The generated catalyst particles continuously fall as they react in the reaction vessel 4. After passing through the stirrer 48, the catalyst particles undergo a process of breaking, colliding, and breaking again in sequence. Meanwhile, the small molecule byproducts generated by the reaction are carried out of the reaction vessel 4 by nitrogen pumped in by the first air compressor 8 and the second air compressor 12 through the first air inlet 46 and the second air inlet 47.

[0053] After being stirred by stirrer 48, the reactant precipitate falls to the precipitate collection area at the bottom of reaction tank 4 and is discharged from reaction tank 4 through discharge valve 10. It is then dried by an external vacuum dryer to obtain catalyst powder, thus completing the preparation of the catalyst.

[0054] The above description is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above through embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An atomized opposed flow catalyst production apparatus characterized by comprising: It includes a first raw material tank (1), a second raw material tank (5), a first reaction liquid buffer tank (3), a second reaction liquid buffer tank (7), a reaction tank (4), a first air compressor (8), and a second air compressor (12); the first raw material tank (1) is connected to the reaction tank (4) through the first reaction liquid buffer tank (3), the second raw material tank (5) is connected to the reaction tank (4) through the second reaction liquid buffer tank (7), and the first air compressor (8) and the second air compressor (12) are both connected to the bottom of the reaction tank (4); A first high-pressure atomizing nozzle (43) is provided at the connection between the reaction tank (4) and the first reaction liquid buffer tank (3), and a second high-pressure atomizing nozzle (44) is provided at the connection between the reaction tank (4) and the second reaction liquid buffer tank (7). Both the first high-pressure atomizing nozzle (43) and the second high-pressure atomizing nozzle (44) are located at the top of the reaction tank (4).

2. The apparatus of claim 1, wherein, A demister (42) is also provided on the top of the reaction vessel (4).

3. The apparatus of claim 1, wherein, The first high-pressure atomizing nozzle (43) and the second high-pressure atomizing nozzle (44) are symmetrically arranged.

4. The apparatus of claim 1, wherein, The first raw material tank (1) is connected to a first ultrasonic disperser (2), and the second raw material tank (5) is connected to a second ultrasonic disperser (6).

5. The apparatus of claim 1, wherein, The reaction vessel (4) is equipped with a stirrer (48), and the stirrer (48) is located at the bottom of the reaction vessel (4).

6. The apparatus of claim 1, wherein, The bottom of the reaction vessel (4) is provided with a first air inlet (46) and a second air inlet (47), the top of the reaction vessel (4) is provided with a first air outlet (41), and the side wall of the reaction vessel (4) is provided with a second air outlet (45).

7. The apparatus of claim 6, wherein, The first air compressor (8) is connected to the first heating unit (9), and the first air compressor (8) is connected to the first air inlet (46) through the first heating unit (9); the second air compressor (12) is connected to the second heating unit (11), and the second air compressor (12) is connected to the second air inlet (47) through the second heating unit (11).

8. The apparatus of claim 1, wherein, The bottom of the reaction vessel (4) is provided with a discharge port, and the discharge port is connected to a discharge valve (10).

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