A vacuum charging reaction device

Abstract

The utility model relates to a chemical industry field especially relates to a vacuum feeding reaction device, including main cauldron, and the premix cauldron of setting in the top of main cauldron, its characterized in that, the premix cauldron is connected with main cauldron through the connecting pipeline, the inside of main cauldron is equipped with the stirring device, and the top is equipped with the degassing port and first vacuum pump, the premix cauldron is provided with feed valve and discharge valve, and is connected with second vacuum pump, and the premix cauldron realizes its communication or isolation with main cauldron through the opening and closing discharge valve, the premix cauldron is installed with the vibration dispersion screen, and the vibration dispersion screen includes the screen cloth of the inclination setting and the vibrator of driving screen cloth vibration, the vacuum feeding reaction device of the application can enhance the mixing effect of liquid phase and solid phase, and the wetting efficiency and production efficiency are high.

Description

Technical Field

[0001] This utility model relates to the field of chemical machinery, and in particular to a vacuum feeding reaction device. Background Technology

[0002] In many chemical and biosynthetic processes, such as nitration, coupling reactions, and enzyme-catalyzed hydrolysis, the reaction system typically involves the mixing of solid and liquid materials. The solid materials need to be fully wetted, dissolved, or uniformly suspended by the liquid, and the reaction products often precipitate in solid form. Such liquid-solid (LS) heterogeneous reactions are common in large-scale industrial production. Therefore, efficient and reliable LS reactors are key equipment, and their performance directly affects the quality of the final product.

[0003] However, the traditional liquid-solid reactor workflow typically involves directly adding solid powder and liquid reaction medium into the main reactor, with all mixing, mass transfer, and reaction processes entirely dependent on the reactor itself. This method results in low mixing intensity and poor wetting efficiency, leading to a prolonged reaction induction period and an increased overall production cycle. Furthermore, traditional reactors usually operate in an intermittent mode. This means that before each feeding, the reaction must be stopped, the vacuum or inert atmosphere inside the reactor must be released, and solid materials must be added manually or mechanically. This not only causes frequent interruptions to the production process but also introduces the risk of contamination from impurities such as oxygen and moisture, which is detrimental to atmosphere-sensitive reactions. Simultaneously, repeated vacuum breaking and re-establishment of process conditions lead to extended operating times and low equipment utilization and production efficiency. Utility Model Content

[0004] To address the problems mentioned above, this invention provides a vacuum feeding reaction device that enhances the mixing effect of the liquid and solid phases, resulting in high wetting efficiency and production efficiency.

[0005] The solution adopted by this utility model to solve its technical problem is: a vacuum feeding reaction device, including a main vessel and a premixing vessel disposed on the top of the main vessel, wherein the premixing vessel is connected to the main vessel through a connecting pipe;

[0006] The main vessel is equipped with a stirring device inside, and a degassing port and a first vacuum pump are located at the top;

[0007] The premixing vessel is equipped with a feed valve and a discharge valve, and is connected to a second vacuum pump. The premixing vessel can be connected to or isolated from the main vessel by opening and closing the discharge valve.

[0008] The premixing vessel is equipped with a vibrating dispersing screen, which includes an inclined screen and a vibrator that drives the screen to vibrate.

[0009] Furthermore, the connecting pipe extends into the interior of the main vessel and slopes towards the center of the main vessel; a flow divider hood is also provided inside the main vessel.

[0010] The diversion hood is located at the bottom of the connecting pipe. The diversion hood includes a pointed tip and a rounded bottom. The pointed tip is directly opposite the bottom outlet of the connecting pipe. The diversion hood extends gradually from the pointed tip to the rounded bottom to form a diversion surface, which is used to receive and disperse falling materials.

[0011] Furthermore, the outer surface of the flow divider is provided with several sets of radially distributed guide ribs, each set of guide ribs including multiple guide ribs of different lengths.

[0012] Furthermore, the main vessel is equipped with a double-layer jacket.

[0013] Furthermore, a condenser is connected to the gas outlet, and the condenser is equipped with a drain port and a condenser coil for introducing the condensing medium.

[0014] Furthermore, a dryer is provided inside the main vessel, the dryer including a shell and an adsorption core, the adsorption core being used to adsorb water vapor inside the main vessel.

[0015] In summary, the beneficial effects of this utility model are as follows:

[0016] 1. The vacuum feeding reaction device of this application is equipped with a premixing vessel, in which solids and liquids can be premixed and preactivated in advance. The premixing vessel and the main vessel are respectively connected to separate vacuum pumps. While the main vessel is reacting, the material in the premixing vessel can be prepared for vacuuming in advance, so that the pressure in the premixing vessel is balanced with that in the main vessel. After the discharge valve is opened, the material directly enters the main vessel by gravity or pressure difference without disrupting the vacuum environment of the main vessel, saving the time-consuming process of repeated vacuuming, thereby greatly shortening the total reaction time in the main vessel.

[0017] In addition, the vibrating dispersion screen can effectively break up agglomerated solid raw materials, allowing them to fall into the main vessel in a uniform mist or fine stream form, increasing the specific surface area of ​​the solid raw materials and making them more fully contacted with the materials in the main vessel, effectively avoiding the entanglement phenomenon and improving the reaction conversion rate. At the same time, the vibrator drives the screen to vibrate at high frequency, which can also prevent the screen from clogging.

[0018] 2. The connecting pipe extends into the main vessel and slopes towards the center of the main vessel. The main vessel is also equipped with a flow divider hood, which includes a tip and a round bottom. A flow divider surface is formed between the tip and the round bottom, and the outer surface of the flow divider hood is equipped with guide ribs. Through the above design, the dispersion of solid raw materials coming out of the premixing vessel can be further improved, which facilitates the uniform mixing of the raw materials with the materials in the main vessel and improves the reaction conversion rate.

[0019] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0020] Figure 1 This is the front view of this embodiment;

[0021] Figure 2 This is a schematic diagram of the structure of this embodiment;

[0022] Figure 3 This is a cross-sectional view of an embodiment.

[0023] In the diagram: 1. Main vessel; 11. First vacuum pump; 2. Premixing vessel; 21. Second vacuum pump; 22. Viewing window; 23. Feed valve; 24. Outlet valve; 3. Connecting pipe; 4. Stirring device; 5. Vibrating dispersion screen; 51. Screen; 52. Vibrator; 6. Diverter hood; 61. Guide rib; 7. Condenser separator; 8. Dryer. Detailed Implementation

[0024] To make the content of this utility model easier to understand, the present utility model will be further described below with reference to specific embodiments and accompanying drawings.

[0025] It should be noted that the terms "center," "upper," "lower," "front," "rear," "left," "right," "inner," and "outer" used herein to indicate the 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. Unless otherwise stated, "a plurality of" means two or more.

[0026] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] like Figures 1 to 3 As shown, a vacuum feeding reaction apparatus includes a main vessel and a premixing vessel located on top of the main vessel, such as... Figure 1As shown, the main vessel and the premixing vessel are connected by pipelines to achieve material transportation. The main vessel is equipped with a stirring device, which includes a drive motor, a stirring shaft, and stirring blades fixed on the stirring shaft, all located at the bottom of the main vessel. The top of the main vessel is equipped with a degassing port and a first vacuum pump.

[0028] like Figure 3 As shown, the premixing vessel in this embodiment is equipped with a feed valve and a discharge valve, and is connected to a second vacuum pump. The premixing vessel can achieve communication or isolation with the main vessel by opening and closing the discharge valve, and is independently evacuated by the second vacuum pump. In addition, a transparent viewing window is provided on the side wall of the premixing vessel in this embodiment, allowing the user to observe the mixing status of the materials inside the premixing vessel.

[0029] like Figure 2 and Figure 3 As shown, a vibrating dispersing screen is installed inside the premixing vessel. The vibrating dispersing screen includes an inclined screen and a vibrator that drives the screen to vibrate at high frequency and micro-amplitude. The screen is fixedly connected to the drive shaft of the vibrator and is used for the initial dispersion and sieving of materials. Specifically, the vibrator is rigidly connected to the side of the premixing vessel by bolts. The screen is set at an inclination angle of 5°-15° at the center of the premixing vessel cavity and does not contact the vessel wall. In this embodiment, the screen includes a support frame and a mesh fixed inside the support frame. The support frame is wrapped with a rubber buffer gasket. Through the above design, the vibration energy on the screen is prevented from being transmitted to the shell of the premixing vessel, thereby protecting the structure of the premixing vessel and preventing it from loosening or being damaged due to long-term vibration.

[0030] The connecting pipe extends downwards from the premixing vessel into the main vessel, sloping towards the center. A flow divider is located below its outlet, consisting of a pointed tip and a rounded bottom, with the tip directly facing the connecting pipe outlet. The flow divider gradually expands from the pointed tip to the rounded bottom, forming a curved structure to catch and evenly disperse falling material. Multiple sets of radially distributed guide ribs are provided on the outer surface of the flow divider, each set consisting of multiple guide ribs of varying lengths, further guiding the material to diffuse in different directions.

[0031] The main reactor is equipped with a double-jacketed system, allowing the introduction of heating or cooling media to control the reaction temperature. A condenser is connected to the gas outlet, featuring a drain port and a condenser coil. This design allows the condenser coil to be used to introduce a condensing medium, condensing and separating condensable components from the discharged gas, with the condensate discharged through the drain port.

[0032] The main vessel is also equipped with a dryer, which includes a shell and an adsorption core. The adsorption core can adsorb the water vapor generated during the reaction process and keep the atmosphere inside the vessel dry.

[0033] The working process of the vacuum feeding reaction device in this embodiment is as follows:

[0034] ① Feeding and pretreatment in the premixing kettle: Open the feed valve to feed the raw materials into the premixing kettle, start the vibrating dispersion screen to screen and disperse the materials, and at the same time, use the second vacuum pump to evacuate the premixing kettle.

[0035] ② Material conveying and dispersion: Open the discharge valve, and the material falls into the main vessel through the connecting pipe under the action of gravity and pressure difference. The diversion hood and its guide ribs at the outlet of the connecting pipe disperse the falling material and guide it radially to avoid accumulation.

[0036] ③ Main reactor reaction and control: The main reactor stirring device operates continuously, and the double-jacketed system is circulated with a medium to maintain the reaction temperature. The dryer adsorbs the moisture generated during the reaction, keeping the environment dry.

[0037] ④ Gas treatment and recovery: The gas generated in the reaction enters the condenser separator through the top degassing port, the condensate is discharged periodically through the drain port, and the uncondensed gas enters the collection system.

[0038] The embodiments described above are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and modifications made by those skilled in the art based on this utility model shall fall within the scope of protection of this utility model.

Claims

1. A vacuum feeding reaction apparatus, comprising a main vessel and a premixing vessel disposed on top of the main vessel, characterized in that, The premixing vessel is connected to the main vessel via connecting pipes; The main vessel is equipped with a stirring device inside, and a degassing port and a first vacuum pump are located at the top; The premixing vessel is equipped with a feed valve and a discharge valve, and is connected to a second vacuum pump. The premixing vessel can be connected to or isolated from the main vessel by opening and closing the discharge valve. The premixing vessel is equipped with a vibrating dispersing screen, which includes an inclined screen and a vibrator that drives the screen to vibrate.

2. The vacuum feeding reaction apparatus according to claim 1, characterized in that, The connecting pipe extends into the main vessel and slopes towards the center of the main vessel. A flow divider is also provided inside the main vessel. The diversion hood is located at the bottom of the connecting pipe. The diversion hood includes a pointed tip and a rounded bottom. The pointed tip is directly opposite the bottom outlet of the connecting pipe. The diversion hood extends gradually from the pointed tip to the rounded bottom to form a diversion surface, which is used to receive and disperse falling materials.

3. The vacuum feeding reaction apparatus according to claim 2, characterized in that, The outer surface of the flow divider is provided with several sets of radially distributed flow guide ribs, each set of flow guide ribs including multiple flow guide ribs of different lengths.

4. The vacuum feeding reaction apparatus according to claim 1, characterized in that, The main vessel is equipped with a double-layer jacket.

5. The vacuum feeding reaction apparatus according to claim 1, characterized in that, A condenser is connected to the gas outlet, and the condenser is equipped with a drain port and a condenser coil for introducing the condensing medium.

6. The vacuum feeding reaction apparatus according to claim 1, characterized in that, The main vessel is equipped with a dryer, which includes a shell and an adsorption core. The adsorption core is used to adsorb water vapor in the main vessel.

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