A secondary bubble-generating reactor

Abstract

This utility model relates to a secondary bubble-forming reactor, comprising a reactor body with a stirring shaft inside. The stirring shaft has a central axis with a gas flow channel penetrating its bottom. The upper side wall of the stirring shaft has a suction hole communicating with the gas flow channel, and the outer port of the suction hole is connected to the gas outlet at the top of the reactor body. The lower end of the stirring shaft is connected to an impeller shaft via an acceleration transmission device. An impeller is fixed on the impeller shaft, and the central axis of the impeller shaft has a gas flow channel penetrating its upper and lower ends, with the upper port of the impeller shaft's gas flow channel communicating with the lower port of the stirring shaft's gas flow channel. With this structure, under the same main shaft rotation speed, the bottom impeller rotation speed is increased. Therefore, the fluid can obtain a high flow rate and a high negative pressure zone at the bottom of the reactor, effectively circulating unreacted gas in the upper space of the reactor to the negative pressure zone at the bottom of the reactor through the hollow stirring shaft and impeller shaft. Secondary bubbles are formed through the high shear force of the bottom impeller, increasing the gas-liquid contact area, improving the carbon dioxide reaction rate, and thus increasing the utilization rate of the reactant gas.

Description

Technical Field

[0001] This utility model relates to the field of reaction vessel technology, specifically to a reaction vessel with secondary bubble generation. Background Technology

[0002] Reactors are common reaction vessels in chemical production. Some reactors are equipped with stirring shafts to agitate the mixture, while some reactors that perform gas-liquid reactions also use self-priming stirring shafts. In existing self-priming stirring shafts, the bottom impeller and stirring blades are coaxially driven, and the angular velocity of the bottom impeller is the same as that of the stirring blades. It is difficult to increase the linear velocity of the fluid at the bottom, thus limiting the generation of negative pressure at the bottom and resulting in poor suction. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a reaction vessel with secondary bubble formation.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A secondary bubble-forming reactor includes a vessel body with a stirring shaft inside. The stirring shaft is driven to rotate by a motor located at the top of the vessel body. A stirring blade is fixed in the middle of the stirring shaft. An airflow channel penetrating the bottom of the stirring shaft is provided on the central axis of the stirring shaft. An air intake hole communicating with the airflow channel is provided on the upper side wall of the stirring shaft. The outer port of the air intake hole is connected to the air supply at the top of the vessel body. The lower end of the stirring shaft is connected to an impeller shaft through an acceleration transmission device. After acceleration, the rotation speed of the impeller shaft is greater than that of the stirring shaft. An impeller is fixed on the impeller shaft. An airflow channel penetrating the upper and lower ends of the impeller shaft is provided on the central axis of the impeller shaft. The upper port of the airflow channel of the impeller shaft is connected to the lower port of the airflow channel of the stirring shaft. The lower port of the airflow channel of the impeller shaft forms an exhaust hole.

[0005] Furthermore, the acceleration actuator includes a housing, the upper end of which is fixedly sleeved on the stirring shaft, the lower end of which extends into the housing, an internal gear ring fixed to the inner wall of the housing, the upper end of the impeller shaft extending into the housing and the middle part of the impeller shaft connected to the lower end of the housing via a bearing, and a transmission gear that rotates synchronously with the upper end of the impeller shaft. The transmission gear and the internal gear ring are meshed and connected by a plurality of transition gears spaced apart along the circumferential direction, and the number of teeth of the internal gear ring is greater than the number of teeth of the transmission gear.

[0006] Furthermore, the drive shaft is connected to the drive gear via a key.

[0007] Furthermore, the upper sidewall of the stirring shaft is provided with a plurality of air intake holes that are equally spaced along the circumferential direction.

[0008] Furthermore, the stirring blades have two layers.

[0009] Furthermore, the impeller has a three-bladed or five-bladed structure.

[0010] This invention employs the above technical solution, connecting the stirring shaft and impeller shaft via an acceleration transmission device. This increases the rotational speed of the bottom impeller. Under the same main shaft rotational speed, the bottom impeller rotational speed increases, thus enabling the fluid to achieve a high flow rate and a high negative pressure zone at the bottom of the reactor. This effectively circulates unreacted gas in the upper space of the reactor to the negative pressure zone at the bottom of the reactor through the hollow stirring shaft and impeller shaft. Under the action of the high-speed rotating impeller, the unreacted gas forms bubbles again and reacts in the solution, thereby improving the utilization rate of unreacted gas and increasing the gas-liquid contact area, thus increasing the carbon dioxide reaction rate. Attached Figure Description

[0011] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the stirring shaft; Figure 3 This is a top view of the accelerator drive; Figure 4 This is a top view of the impeller. Detailed Implementation

[0012] like Figure 1-4 As shown, this utility model discloses a secondary bubble-forming reactor, comprising a reactor body 1. A stirring shaft 2 is installed inside the reactor body 1, driven to rotate by a motor 3 located at the top of the reactor body 1. A stirring blade 4 is fixed in the middle of the stirring shaft 2. An airflow channel 21 penetrating the bottom of the stirring shaft 2 is provided on its central axis. Multiple suction holes 22 are provided on the upper side wall of the stirring shaft 2, evenly spaced along the circumferential direction. The outer ports of the suction holes 22 communicate with the air supply at the top of the reactor body 1. The lower end of the stirring shaft 2 is connected to an impeller shaft 6 via an acceleration transmission 5. After acceleration, the rotational speed of the impeller shaft 6 is greater than that of the stirring shaft 2. An impeller 7 is fixed on the impeller shaft 6, which can be a three-bladed or five-bladed structure. An airflow channel penetrating the upper and lower ends of the impeller shaft 6 is provided on its central axis, and the upper port of the airflow channel of the impeller shaft 6 communicates with the lower port of the airflow channel of the stirring shaft 2. The lower port of the airflow channel of the impeller shaft 6 forms an exhaust port.

[0013] The stirring blade 4 is used to achieve the stirring function. To improve the stirring effect, the stirring blade 4 is designed with a two-layer structure to promote the reaction. The bottom impeller 7 is used to achieve self-absorption and secondary bubble formation of unreacted gases.

[0014] In this invention, the accelerator 5 includes a housing 51, the upper end of which is fixedly sleeved on a stirring shaft 2. The lower end of the stirring shaft 2 extends into the housing 51. An internal gear ring 52 is fixed to the inner wall of the housing 51. The upper end of an impeller shaft 6 extends into the housing 51, and the middle part of the impeller shaft 6 is connected to the lower end of the housing 51 via a bearing. The upper end of the impeller shaft 6 is provided with a transmission gear 53 that rotates synchronously with it (the impeller shaft 6 is connected to the transmission gear 53 via a key). The transmission gear 53 and the internal gear ring 52 are meshed and connected by multiple transition gears 54 spaced apart along the circumferential direction. The number of teeth on the internal gear ring 52 is greater than the number of teeth on the transmission gear 53. According to the transmission principle of gears, the impeller shaft 6 will create an acceleration effect. The specific rotational configuration of the impeller shaft 6 is designed based on the number of teeth on the internal gear ring 52 and the number of teeth on the transmission gear 53.

[0015] To improve sealing, an O-ring is installed at the connection between the upper port of the housing 51 of the accelerator 5 and the stirring shaft 2 to achieve static sealing, while a lip seal is installed at the connection between the lower port of the housing 51 of the accelerator 5 and the impeller shaft 6 to achieve dynamic sealing.

[0016] The working principle of this invention is as follows: The stirring shaft 2 and the impeller shaft 6 are connected by an acceleration transmission 5, which can increase the rotational speed of the bottom impeller 7. Under the same main shaft rotational speed, the rotational speed of the bottom impeller 7 will be higher. Therefore, the fluid can obtain a high flow rate and a high negative pressure zone at the bottom of the reactor. This effectively circulates the unreacted gas in the upper space of the reactor to the negative pressure zone at the bottom of the reactor through the hollow stirring shaft 2 and impeller shaft 6. Under the action of the high-speed rotating impeller 7, the unreacted gas will form bubbles again and react again in the solution. In addition, the high-speed rotation of the impeller 7 will throw the fluid carrying the unreacted gas bubbles toward the inner wall of the reactor and rise along the inner wall. Under the control of the stirring blades 4, the fluid will descend from the top along the stirring shaft 2 to the bottom.

[0017] The specific embodiments of this utility model have been described above. However, those skilled in the art should understand that this is only an example. Those skilled in the art can make various changes or modifications to this embodiment without departing from the principle and essence of this utility model, but all such changes and modifications fall within the protection scope of this utility model.

Claims

1. A secondary bubble-forming reactor, comprising a reactor body, an internal stirring shaft driven to rotate by a motor located at the top of the reactor body, a stirring blade fixed in the middle of the stirring shaft, an airflow channel penetrating its bottom provided on the central shaft of the stirring shaft, and an air intake hole communicating with the airflow channel on the upper side wall of the stirring shaft, the outer port of the air intake hole communicating with an air connection at the top of the reactor body; characterized in that: The lower end of the stirring shaft is connected to the impeller shaft via an acceleration transmission device. After acceleration, the rotation speed of the impeller shaft is greater than that of the stirring shaft. An impeller is fixed on the impeller shaft. The central shaft of the impeller shaft is provided with an airflow channel that runs through its upper and lower ends. The upper port of the airflow channel of the impeller shaft is connected to the lower port of the airflow channel of the stirring shaft. The lower port of the airflow channel of the impeller shaft forms an exhaust hole.

2. The reaction vessel for secondary bubble formation according to claim 1, characterized in that: The accelerator includes a housing, the upper end of which is fixedly sleeved on a stirring shaft, the lower end of which extends into the housing, and an internal gear ring fixed to the inner wall of the housing. The upper end of the impeller shaft extends into the housing, and the middle part of the impeller shaft is connected to the lower end of the housing via a bearing. The upper end of the impeller shaft is provided with a transmission gear that rotates synchronously with it. The transmission gear and the internal gear ring are meshed and connected by multiple transition gears spaced apart along the circumferential direction. The number of teeth on the internal gear ring is greater than the number of teeth on the transmission gear.

3. The reaction vessel for secondary bubble formation according to claim 2, characterized in that: The impeller shaft is connected to the transmission gear via a key.

4. The reaction vessel for secondary bubble formation according to claim 1, characterized in that: The upper sidewall of the stirring shaft is provided with multiple air intake holes that are equally spaced along the circumference.

5. The reaction vessel for secondary bubble formation according to claim 1, characterized in that: The stirring blades have two layers.

6. The reaction vessel for secondary bubble formation according to claim 1, characterized in that: The impeller has a three- or five-bladed structure.

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