A double helix spiral groove induced impinging stream reactor for preparing ultrafine powder

Abstract

A kind of preparation of superfine powder double helix spiral groove induction type impinging stream reaction kettle, it is related to a kind of preparation of superfine powder reaction kettle device.The reaction kettle main body is closed cavity, feed pipe is arranged on the nozzle of reaction kettle main body two sides;Impinging area is located in the center position of reaction kettle main body;The device is arranged in the lower part of reaction kettle impinging area arc baffle, and spiral groove is arranged in the bottom of double curved wall, enhances fluid shearing effect, realizes the efficient preparation of superfine powder.First, after the impingement of two reaction solution, the radial jet impact arc baffle formed by the impingement of two reaction solution, forms high-speed impact jet;Flow into the groove of the bottom wall of double curved surface, and the groove is strengthened by special wall structure to strengthen fluid mixing and control.Double curved bottom wall groove guides fluid orderly flow, prolongs mixing time, strengthens mixing and reaction effect, and is beneficial to improve reaction efficiency.Reaction solution is impacted again by baffle after impingement in impinging area, effectively enhances the turbulent degree of fluid, improves the fluid mixing efficiency, provides more ideal environment for reaction, and can be used in fine chemical industry and biological pharmacy etc.

Description

Technical Field

[0001] This utility model relates to a reaction vessel for preparing ultrafine powders, and more particularly to a hyperbolic spiral groove induced impingement flow reaction vessel for preparing ultrafine powders. Background Technology

[0002] While methods for preparing ultrafine powders, such as mechanical stirring, can achieve a certain degree of powder refinement, they still have many shortcomings in terms of precise particle size control, reaction equipment, and production efficiency.

[0003] For example, patent CN113600158A uses a co-precipitation method to prepare ultrafine powders. It achieves mixing and mass transfer of the reaction solution through gas disturbance and mechanical stirring, but this method easily leads to particle agglomeration and low mixing efficiency. Currently, impinging flow technology is used in the preparation of ultrafine powders. Through the high-speed collision of two or more fluid streams, it enhances mixing and reaction, improving powder uniformity and particle size refinement, but there is still room for optimization.

[0004] Impinging flow is a core technique in chemical processes. Its principle involves the collision of two high-speed, opposing fluid streams, creating a highly turbulent region in the collision zone. This enhances interphase transport and promotes micro-mixing. Impinging flow technology not only improves reaction efficiency and shortens reaction time but also increases supersaturation and promotes crystallization. It is now widely used in mixing, crystallization, and the preparation of ultrafine powders.

[0005] Practice has shown that by designing the arc-shaped baffle and grooves in the reactor, the mixing efficiency can be improved, the uniform preparation of ultrafine powder can be achieved, the impingement flow preparation process of ultrafine powder can be strengthened, and the strong disturbance generated by the fluid impacting the arc-shaped baffle and the flow in the groove can further suppress the agglomeration of crystal nuclei. Summary of the Invention

[0006] The purpose of this invention is to provide a hyperbolic spiral groove induced impingement flow reactor for preparing ultrafine powders. This invention improves mixing efficiency and achieves uniform preparation of ultrafine powders through the structural design of the arc-shaped baffle and groove of the reactor, strengthens the impingement flow process for preparing ultrafine powders, and further suppresses crystal nucleus agglomeration by utilizing the strong disturbance generated by the fluid impacting the arc-shaped baffle and the flow in the groove, thereby achieving precise control over the particle size and crystallinity of ultrafine powders.

[0007] The objective of this utility model is achieved through the following technical solution:

[0008] A hyperbolic spiral groove induced impact flow reactor for preparing ultrafine powders is disclosed. The reactor body is a closed cavity, with feed pipes installed on nozzles on both sides of the reactor body. The impact zone is located at the center of the reactor body. A discharge pipe is connected to a discharge bucket at the rear end of the reaction zone. An arc-shaped baffle is installed below the impact zone, and the impact zone is provided with radial jet impacting the arc-shaped baffle. The impact zone is a hyperbolic bottom wall, and the hyperbolic bottom wall of the reactor is provided with spiral grooves. The hyperbolic annular arc-shaped baffle and the groove structure form a multi-level gradient distribution.

[0009] The hyperbolic spiral groove induced impingement flow reactor for preparing ultrafine powders includes a reactor body, nozzle, arc baffle, drain port, overflow port, feed tank, centrifugal pump, temperature regulator, discharge tank, circulation pump, valves, and electromagnetic flow meter.

[0010] The hyperbolic spiral groove induced impingement flow reactor for preparing ultrafine powders has an umbrella-shaped arc baffle and a radial jet outlet pointing towards the bottom wall of the hyperbolic curve.

[0011] The hyperbolic spiral groove induced impingement flow reactor for preparing ultrafine powders is described above, wherein the grooves are provided on the hyperbolic wall and are spiral in shape.

[0012] The significant features and positive effects of this utility model are:

[0013] 1. The internal structure design of this utility model reactor includes arc-shaped baffles and hyperbolic wall grooves. The hyperbolic spiral groove induced impact flow reactor aims to enhance fluid mixing through the arc-shaped baffles and grooves. Taking the preparation of calcium carbonate ultrafine powder from sodium carbonate solution and calcium chloride solution as an example, after the fluid impacts inside the reactor, it is impacted again on the arc-shaped baffles to form an impact jet before diffusing towards the hyperbolic wall. After flowing through the spiral grooves on the wall, the material is discharged. The mixing time of the fluid in the grooves is extended, enhancing the turbulence effect, effectively prolonging the liquid-liquid contact time, and precisely controlling the particle size.

[0014] 2. This invention features an arc-shaped baffle at the bottom of the impact zone of the impingement flow reactor to enhance fluid turbulence. The reactant solution impacts the baffle to form a radial jet, which then impacts the baffle to create a high-speed impinging jet that flows into the hyperbolic groove at the bottom. Combined with the vortex-enhancing effect of the bottom groove, this significantly improves mixing uniformity. The groove design extends the fluid contact time within the device, which is beneficial for increasing the reaction rate and improving powder particle uniformity. The combination of these two technologies can significantly improve product yield and promote internal uniform mixing, thereby enhancing reaction efficiency.

[0015] 3. The device described in this utility model has a simple structure, low cost, low energy consumption, and reasonable layout, and can be widely used in fields such as nanomaterials and fine chemicals. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the reaction vessel of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the reaction vessel of this utility model;

[0018] Figure 3 This is a schematic diagram of the groove structure of the reaction vessel of this utility model;

[0019] Figure 4 This is a top view of the arc-shaped baffle structure of the reactor of this utility model.

[0020] In the diagram: 1—Ceiling body, 2—Nozzle, 3—Arc baffle, 4—Drain outlet, 5—Overflow outlet, 6—Feed tank, 7—Centrifugal pump, 8—Temperature regulator, 9—Discharge tank, 10—Circulation pump, 11—Valve, 12—Electromagnetic flow meter. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings.

[0022] This utility model of a reaction vessel device consists of 12 components, including the vessel body 1, the arc-shaped baffle 3, etc. Figure 1 As shown. First, centrifugal pump 7 is connected to feed tank 6, pumping the reactant solution to nozzles 2 coaxially positioned on both sides of reactor 1. Temperature regulator 8 monitors and adjusts the temperature of feed tank in real time. Electromagnetic flowmeter 12 is installed on the pipeline connected to the nozzles to control the flow rate and velocity. The solution impacts inside the reactor, forming a radial jet, and then forms a high-speed impact jet at the arc-shaped baffle 3. Afterward, the fluid flows into the groove on the bottom wall of the hyperbolic curve, guiding the flow, and is discharged from the drain port 4 to the discharge tank 9. Valve 11 and centrifugal pump 7 are opened, pumping liquid from feed tank 6 to the inlet of nozzle 2. The flow rate is controlled by electromagnetic flowmeter 12 and valve 11, and circulation pump 10 performs circulation impact. After the two fluids are accelerated through the input channel, they collide in the middle region of the device, forming a radial jet. The impacted fluid flows towards the arc-shaped baffle 3, forming a high-speed impact jet and spreading towards the hyperbolic wall, entering the bottom groove for spiral flow, increasing the fluid turbulence, causing the fluid to generate multi-stage vortices, prolonging the mixing time, and ultimately achieving efficient mass transfer and mixing. The intelligent temperature regulator 8 controls the temperature of the feed liquid in real time. After a certain reaction time, the suspension is taken out for aging, filtration, drying, and grinding to finally obtain powder.

[0023] Example

[0024] The process of preparing CaCO3 ultrafine powder using a hyperbolic spiral groove induced impact flow reactor of this invention is as follows: First, the centrifugal pump 7 is started to pump calcium chloride solution and sodium carbonate solution to nozzles 2 on both sides of the device. The flow rate of the solution is controlled by valve 11 and flow control components. After the solution is accelerated by the nozzles, it impacts in the impact zone of the reactor, and the resulting radial jet is formed into a high-speed jet under the action of the arc-shaped baffle 3. The fluid after impacting the arc-shaped baffle diffuses towards the bottom of the device. When flowing through the hyperbolic wall, its groove structure guides the fluid flow, prolonging the reaction time and improving the reaction efficiency. Under the combined action of the baffle and the groove, the contact area between the sodium carbonate solution and the calcium chloride solution is significantly increased, and the reaction rate is accelerated. During the reaction, the temperature inside the device is monitored in real time by the temperature regulator 8 to ensure the stability of the reaction. After the reaction was completed, the suspension was collected from the outlet and subjected to aging, filtration, drying, and grinding processes to finally obtain CaCO3 ultrafine powder. The average particle size of the CaCO3 obtained in the example was 1.75 μm, and the reaction rate constant of the reactor preparation was 0.138 s. -1 During this process, the arc-shaped baffle enhances fluid impact, and the groove design extends the fluid mixing time. Together, they improve reaction efficiency and powder uniformity. The impact flow reactor proposed in this invention shows significant efficiency advantages in the preparation of CaCO3 ultrafine powder.

[0025] Compared with traditional bubble column reactors, this reactor increases product particle size by 90%; compared with mechanical stirring, it refines product particle size by 90% and increases reaction rate by 70%; compared with membrane reactors, its overall efficiency is 95% higher; compared with microstructure reactors, it increases reaction rate by 80%; and compared with packed bed reactors, it increases reaction rate by 40% and refines reactant particle size by 70%. This reactor improves powder preparation efficiency through structural innovation and provides a reliable solution for preparing ultrafine powders in industrial production.

Claims

1. A hyperbolic spiral groove induced impinging flow reactor for preparing ultrafine powders, characterized in that, The reactor body is a sealed cavity, and the feed pipe is set on the nozzles on both sides of the reactor body; the impact zone is located at the center of the reactor body; the discharge pipe is connected to the rear end of the reaction zone and a discharge bucket is set there; the reactor arc baffle is installed below the impact zone, and the impact zone is provided with radial jet impact arc baffle. The impact zone is a hyperbolic bottom wall, and the hyperbolic bottom wall of the reactor is provided with spiral grooves; the hyperbolic annular reactor arc baffle and groove structure form a multi-level gradient distribution.

2. The hyperbolic spiral groove induced impinging flow reactor for preparing ultrafine powders according to claim 1, characterized in that, The reactor includes a vessel body, nozzle, arc-shaped baffle, drain port, overflow port, feed tank, centrifugal pump, temperature regulator, discharge tank, circulating pump, valves, and electromagnetic flow meter.

3. The hyperbolic spiral groove induced impinging flow reactor for preparing ultrafine powders according to claim 1, characterized in that, The arc-shaped baffle is umbrella-shaped, and the radial jet outlet points towards the bottom wall of the hyperbola.

4. The hyperbolic spiral groove induced impinging flow reactor for preparing ultrafine powders according to claim 1, characterized in that, The groove is located on the hyperbolic wall and is spiral in shape.

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