A fluorination reaction kettle and method for purifying industrial chemicals

Abstract

The application discloses a kind of fluorinated chemical purification reaction kettle and method, it is related to material purification technical field, the reaction kettle includes kettle body, is provided with stirring mechanism in it, stirring mechanism includes stirring drive piece, stirring shaft and converging flow component, the output end of stirring drive component is drivingly connected with stirring shaft, the inside of stirring shaft is opened with liquid lift passage, the end side of stirring shaft is opened with converging flow hole in the bottom end of kettle body interior, converging flow hole is communicated with the inlet of liquid lift passage, the side of stirring shaft is opened with drain outlet above the position of reaction liquid level, drain outlet is communicated with the outlet of liquid lift passage, converging flow component is set in converging flow hole side, converging flow component is used to converge flow reaction liquid in the bottom of kettle body into converging flow hole, and is in turn displaced to the region above reaction liquid level by liquid lift passage and drain outlet;The reaction kettle can realize the circumferential stirring of material in kettle body, can also carry out vertical direction circulation flow, improve mixing uniformity effect, guarantee reaction rate.

Description

Technical Field

[0001] This invention belongs to the field of material purification technology, specifically relating to a reaction vessel and method for fluorine chemical purification. Background Technology

[0002] In a broad sense, a reaction vessel is a container where physical or chemical reactions occur. Through structural design and parameter configuration, it achieves the heating, evaporation, cooling, and low-to-high-speed mixing functions required by the process. Reaction vessels are widely used in industries such as petroleum, chemical, rubber, pesticide, pharmaceutical, and food to complete processes such as vulcanization, nitration, fluorination, hydrogenation, polymerization, and condensation.

[0003] In fluorochemical production, the purification process plays a decisive role in product purity, performance, and subsequent processing efficiency, while the uniformity of raw material mixing is a core prerequisite for effective purification. Fluorochemical raw materials are mostly fluorine-containing compounds, characterized by high corrosivity, high viscosity, and varying densities. Uniform mixing must be achieved through stirring within the reaction vessel to provide a stable reaction environment for subsequent purification processes such as fluorination and distillation.

[0004] Traditional reactors often employ a conventional flat-blade stirring structure, which can achieve basic mixing. However, raw materials of different densities are prone to stratification due to centrifugal force. Especially when the stirring speed is insufficient, heavy raw materials tend to settle at the bottom of the reactor, while light raw materials float on the surface. This results in uneven distribution of raw materials in the upper and lower regions of the reactor, affecting the purification reaction rate and the stability of product purity. Summary of the Invention

[0005] The purpose of this invention is to provide a simple and rationally designed reaction vessel and method for fluorine chemical purification in order to solve the above-mentioned problems.

[0006] The present invention achieves the above objectives through the following technical solutions:

[0007] In a first aspect, the present invention discloses a reaction vessel for fluorine chemical purification, comprising:

[0008] The vessel body is equipped with a stirring mechanism, which includes a stirring drive, a stirring shaft, and a flow-gathering component. The output end of the stirring drive is connected to the stirring shaft. A liquid-rising channel is provided inside the stirring shaft. A flow-gathering hole is provided on the side of the stirring shaft at the bottom of the vessel body, and the flow-gathering hole is connected to the inlet of the liquid-rising channel. A drain port is provided on the side of the stirring shaft above the reaction liquid level, and the drain port is connected to the outlet of the liquid-rising channel. The flow-gathering component is located on one side of the flow-gathering hole and is used to gather the reaction liquid at the bottom of the vessel body into the flow-gathering hole, and then move it sequentially through the liquid-rising channel and the drain port to the area above the reaction liquid level.

[0009] As a further optimization scheme of the present application, the flow assembly comprises a second stirring blade, the stirring shaft is provided with a mounting platform on one end of the internal bottom end of the kettle body, the flow hole is arranged on the mounting platform, the second stirring blade is arranged on the stirring shaft through the mounting platform, the extension direction of the second stirring blade and the radial direction of the stirring shaft form a first included angle, and along the rotation direction of the stirring shaft, the second stirring blade is located at the rear side of the flow hole, and the second stirring blade is inclined towards the side close to the rotation direction of the stirring shaft, wherein the front end of the second stirring blade is provided with a flow groove.

[0010] As a further optimization scheme of the present application, the second stirring blade is fixedly connected with a rotating disc at one end close to the mounting platform, the rotating disc is rotatably connected in the stirring shaft, one end of the rotating disc away from the second stirring blade is fixedly connected with an abutting plate, the abutting plate is located in the interior of the stirring shaft, the side end of the abutting plate is frictionally abutted with a cam, the input end of the cam is drivingly connected with a driving member, and along the rotation direction of the stirring shaft, the cam is located in front of the abutting plate.

[0011] As a further optimization scheme of the present application, the outlet of the liquid lifting channel is provided with an abutting rod, one end of the abutting rod towards the outlet of the liquid lifting channel has an arc groove, the arc groove is upwardly protruding, and the arc groove is used for dispersing the reaction liquid sprayed from the outlet of the liquid lifting channel into the liquid discharge port.

[0012] As a further optimization scheme of the present application, the lower end of the abutting rod is fixedly connected with a guide rod, one end of the guide rod away from the abutting rod is slidingly connected in the stirring shaft and is sleeved with a spring, the upper end of the abutting rod is fixedly connected with a plug, the plug is located in the liquid storage cavity of the auxiliary shaft, the auxiliary shaft is fixedly connected with the stirring shaft, the side of the auxiliary shaft is provided with a communication hole, the outer portion of the auxiliary shaft is rotatably connected with a transition shaft, the transition cavity of the transition shaft is in communication with the liquid storage cavity of the auxiliary shaft through the communication hole, the transition shaft is fixedly arranged in the kettle body, and the outer portion of the kettle body is provided with a feeding pipe, the feeding pipe is in communication with the transition cavity of the transition shaft through a communication pipe.

[0013] As a further optimization scheme of the present application, the lower edge of the liquid discharge port is provided with a flow guide plate, and the flow guide plate is fixedly connected with the stirring shaft.

[0014] As a further optimization scheme of the present application, the side of the stirring shaft is further fixedly provided with a first stirring blade, wherein the extension direction of the first stirring blade and the radial direction of the stirring shaft form a second included angle, and along the rotation direction of the stirring shaft, the first stirring blade is inclined towards the side away from the rotation direction of the stirring shaft.

[0015] As a further optimization scheme of the present application, along the rotation direction of the stirring shaft, the front side of the first stirring blade is provided with a flow resistance block, and the flow resistance block is in a sawtooth shape.

[0016] As a further optimization of the present invention, a temperature control component is provided on the outside of the vessel body. The temperature control component includes a spiral coil, a heat exchange inlet and a heat exchange outlet. A heat exchange medium flows inside the spiral coil. The heat exchange medium enters the spiral coil through the heat exchange inlet and flows out of the spiral coil through the heat exchange outlet.

[0017] Secondly, the present invention also discloses a method for using a reaction vessel for fluorine chemical purification, comprising the following steps:

[0018] Step 1: Add the various reaction solutions required for the reaction into the reactor body, and drive the stirring shaft to rotate using the stirring drive component;

[0019] Step 2: Driven by the rotation of the flow-gathering component along with the stirring shaft, the reaction liquid in the bottom area of ​​the vessel enters the liquid-rising channel through the flow-gathering hole and is discharged through the liquid outlet to the area above the liquid level of the reaction liquid, thereby realizing the vertical flow and mixing of the reaction liquid in the vessel.

[0020] The present invention has at least the following beneficial effects: The present invention discloses a reaction vessel and method for fluorine chemical purification. The reaction vessel includes a vessel body and a stirring mechanism disposed in the vessel body. The stirring mechanism includes a stirring drive, a stirring shaft and a flow-gathering assembly. By means of the flow-gathering groove of the second stirring blade in the flow-gathering assembly, the reaction liquid at the bottom of the vessel body is gathered to the flow-gathering hole and rises along the liquid rising channel to above the liquid level and is sprinkled on the liquid surface, so as to realize the vertical circulation of the reaction liquid and ensure the mixing effect of the reaction liquid.

[0021] Furthermore, the reaction liquid is sprayed from the outlet of the liquid riser channel onto the push rod, causing the plug to move upward, thereby opening the outlet of the storage chamber to add additives or reaction aids into the reaction liquid. In order to improve the mixing reaction efficiency, when the rotation of the stirring shaft increases, the impact force of the reaction liquid sprayed from the outlet of the liquid riser channel on the push rod increases, thereby increasing the opening degree of the plug and increasing the addition rate of additives, thus avoiding reaction lag due to insufficient additives.

[0022] In addition, a first stirring blade is provided on one side of the stirring shaft, and a flow-blocking block is provided in front of the first stirring blade. When the reaction liquid flows through the serrated edge of the flow-blocking block, local eddies and turbulence (small-scale turbulence) will be formed at the concave and convex points of each serration, breaking the laminar flow state of the liquid. Even if the liquid is mixed locally, it will promote the contact and collision between different components in the local reaction liquid and increase the reaction rate. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is the invention Figure 1 A schematic diagram of a partial sectional view of the frontal structure;

[0025] Figure 3 is the internal cross-sectional structure schematic diagram of the transition shaft and the secondary shaft in the open state of the plug block of the present application;

[0026] Figure 4 is the internal cross-sectional structure schematic diagram of the transition shaft and the secondary shaft in the open state of the plug block of the present application; Figure 3 is the enlarged view of A in the present application;

[0027] Figure 5 is the internal cross-sectional structure schematic diagram of the transition shaft and the secondary shaft in the open state of the plug block of the present application;

[0028] Figure 6 is the structure schematic diagram of the flow converging assembly of the present application;

[0029] Figure 7 is the structure schematic diagram of the flow converging assembly of the present application; Figure 6 is the top view structure schematic diagram of the first stirring blade and the stirring shaft of the present application;

[0030] Figure 8 is the top view structure schematic diagram of the first stirring blade and the stirring shaft of the present application; Figure 7 is the enlarged view of B in the present application;

[0031] Figure 9 is the top view structure schematic diagram of the first stirring blade and the stirring shaft of the present application.

[0032] In the figure: 1, kettle body; 2, stirring mechanism; 21, motor; 22, communication pipe; 221, secondary shaft; 222, transition shaft; 223, communication hole; 224, liquid storage cavity; 225, plug block; 226, abutting rod; 2261, arc groove; 227, liquid discharge port; 228, flow guide plate; 229, guide rod; 2210, spring; 23, stirring shaft; 24, first stirring blade; 241, flow resistance block; 25, second stirring blade; 251, flow converging groove; 252, baffle; 253, mounting table; 254, flow converging hole; 255, liquid lifting passage; 256, rotating disc; 257, abutting plate; 258, cam; 26, discharging pipe; 3, feeding port; 4, temperature control assembly; 5, feeding pipe. DETAILED DESCRIPTION

[0033] It is necessary to point out here that the following detailed description is only used to further illustrate the present application and cannot be understood as limiting the protection scope of the present application, and the skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0034] As shown in Figure 1 , Figure 2 and Figure 6 , the present application provides a reaction kettle for fluorine chemical purification, which comprises:

[0035] The vessel body 1 is equipped with a stirring mechanism 2, which includes a stirring drive, a stirring shaft 23, and a flow-gathering component. The output end of the stirring drive is connected to the stirring shaft 23. A liquid-rising channel 255 is provided inside the stirring shaft 23. A flow-gathering hole 254 is provided on the side of the bottom end of the stirring shaft 23 inside the vessel body 1. The flow-gathering hole 254 is connected to the inlet of the liquid-rising channel 255. A drain port 227 is provided on the side of the stirring shaft 23 above the reaction liquid level. The drain port 227 is connected to the outlet of the liquid-rising channel 255. The flow-gathering component is provided on one side of the flow-gathering hole 254. The flow-gathering component is used to gather the reaction liquid at the bottom of the vessel body 1 into the flow-gathering hole 254, and then move it sequentially through the liquid-rising channel 255 and the drain port 227 to the area above the reaction liquid level.

[0036] It should be noted that, as Figure 2 As shown, the dashed line indicates the liquid level of the reaction liquid. After the various liquid raw materials required for the reaction are added into the vessel 1 through the feed port 3, continuous stirring is required to promote the mixing reaction of the reaction liquid. In the above embodiment, when the stirring shaft 23 is driven to rotate by the stirring drive, the reaction liquid is gathered to the gathering hole 254 by the flow-gathering component. With the pressure of the liquid, it rises along the liquid riser channel 255 to the outlet of the liquid riser channel 255 and is discharged to the area above the liquid level of the reaction liquid through the drain port 227. Under the centrifugal action of the rotation of the stirring shaft 23, it is evenly thrown onto the surface of the reaction liquid in the circumferential direction. Repeating the above action, when the flow-gathering component rotates and stirs the mixture in the circumferential direction with the stirring shaft 23, it can also realize the vertical circulation and mixing of the reaction liquid in the vessel 1, which fully ensures that the various reaction liquids are mixed evenly, evenly distributed, and fully reacted, avoiding the situation where some high-density heavy raw materials are deposited at the bottom of the vessel 1 while light raw materials float on the liquid surface, thus improving the purification reaction rate.

[0037] For example, see [link to relevant documentation]. Figure 6 and Figure 7 The flow-gathering assembly includes a second stirring blade 25. The stirring shaft 23 has a mounting platform 253 on one side of its bottom end inside the vessel body 1. The flow-gathering hole 254 is formed on the mounting platform 253. The second stirring blade 25 is mounted on the stirring shaft 23 via the mounting platform 253. The extending direction of the second stirring blade 25 has a first included angle α with the radial direction of the stirring shaft 23. Figure 7 As shown, the dashed line indicates the radial direction of the stirring shaft 23, and along the rotation direction of the stirring shaft 23, that is... Figure 7 As shown in the counterclockwise direction, the second stirring blade 25 is located behind the flow-gathering hole 254, and the second stirring blade 25 is inclined towards the side closer to the rotation direction of the stirring shaft 23, that is, the first included angle α is the angle of counterclockwise rotation of the dotted line, wherein the front end of the second stirring blade 25 is provided with a flow-gathering groove 251.

[0038] Under the rotation of the second stirring blade 25, under the extrusion of the inclined second stirring blade 25 to the reaction liquid, the extrusion force of the reaction liquid to the second stirring blade 25 has a component force in the radial direction, so as to promote the reaction liquid to flow in the direction of approaching the converging flow hole 254 along the converging groove 251, and with the continuous convergence and extrusion of the liquid, so as to promote the liquid in the kettle body 1 to have a pressure to the liquid in the converging flow hole 254, and the pressure is sufficient to resist the gravity which needs to be overcome by the liquid rising, so that the liquid gathered rises to the area above the liquid level through the liquid rising channel 255.

[0039] For example, continuing to refer to Figure 7 and Figure 8 , the second stirring blade 25 is fixedly connected with a rotating disc 256 at one end close to the mounting table 253, the rotating disc 256 is rotationally connected in the stirring shaft 23, the rotating disc 256 is fixedly connected with an abutting plate 257 at the end away from the second stirring blade 25, the abutting plate 257 is located in the interior of the stirring shaft 23, the side end of the abutting plate 257 frictionally abuts with a cam 258, the input end of the cam 258 is drivingly connected with a driving member, wherein, along the rotation direction of the stirring shaft 23, the cam 258 is located in front of the abutting plate 257.

[0040] It should be noted that the driving member is a driving motor or a driving motor, when the rotation speed of the stirring shaft 23 is increased in order to improve the stirring rate, the resistance received by the second stirring blade 25 will increase, in order to reduce the stirring resistance of the second stirring blade 25, the rotation speed signal of the stirring shaft 23 controls the driving signal of the driving member through the controller, so that when the rotation speed of the stirring shaft 23 is increased, the cam 258 is driven to rotate by the driving member, as Figure 8 shown, the cam 258 rotates counterclockwise, so that the abutting plate 257 is abutted to drive the rotating disc 256 to swing counterclockwise, so as to promote the first included angle a of the second stirring blade 25 to increase, so that the component force of the extrusion force of the reaction liquid to the second stirring blade 25 in the radial direction increases, so as to reduce the component force of the extrusion force of the reaction liquid to the second stirring blade 25 in the direction perpendicular to the surface of the converging groove 251, so as to help the reaction liquid to converge along the converging groove 251.

[0041] It should be further noted that, as Figure 6 shown, the baffle 252 is arranged above and below the second stirring blade 25 respectively, the baffle 252 is fixedly arranged on the mounting table 253, and the end surface of the baffle 252 facing the second stirring blade 25 is attached to the second stirring blade 25, so as to block the reaction liquid converging from the second stirring blade 25 in the up-down direction, reduce the diffusion degree of the reaction liquid near the position of the converging flow hole 254, and improve the converging effect.

[0042] It should be noted that the rotating disc 256 is sealingly attached to the rotating surface of the stirring shaft 23, and will not cause the reaction liquid to enter the area where the cam 258 is located. Moreover, Figure 8 Only the positional relationship between one cam 258 and the abutting plate 257 and the rotating disc 256 is shown, and in actual application, each second stirring blade 25 is respectively provided with a cam 258, an abutting plate 257 and a rotating disc 256, and the plurality of cams 258 are synchronously driven by the corresponding driving members, so as to synchronously adjust the inclination degree of the plurality of second stirring blades 25, which will not be described herein.

[0043] For example, referring to Figure 3 and Figure 4 , the outlet of the liquid lifting channel 255 is provided with an abutting rod 226, the abutting rod 226 has an arc groove 2261 at one end facing the outlet of the liquid lifting channel 255, the arc groove 2261 is upwardly protruding, and the arc groove 2261 is used for dispersing the reaction liquid sprayed from the outlet of the liquid lifting channel 255 into the liquid discharge port 227. Thus, under the obstruction of the arc groove 2261, the reaction liquid which may be in a straight or disordered state is diverted along the surface of the arc groove 2261 to be smoothly guided to the liquid discharge port 227 by the guiding property of the arc surface.

[0044] It should be noted that, referring to Figure 3 and Figure 4 , the lower end of the abutting rod 226 is fixedly connected with a guide rod 229, one end of the guide rod 229 away from the abutting rod 226 is slidingly connected in the stirring shaft 23 and is sleeved with a spring 2210, the upper end of the abutting rod 226 is fixedly connected with a plug 225, the plug 225 is located in the liquid storage cavity 224 of a secondary shaft 221, the secondary shaft 221 is fixedly connected with the stirring shaft 23, the side of the secondary shaft 221 is provided with a communication hole 223, the outer portion of the secondary shaft 221 is rotatably connected with a transition shaft 222, the transition cavity of the transition shaft 222 is in communication with the liquid storage cavity 224 of the secondary shaft 221 through the communication hole 223, the transition shaft 222 is fixedly arranged in the kettle body 1, the kettle body 1 is externally provided with a feeding pipe 5, and the feeding pipe 5 is in communication with the transition cavity of the transition shaft 222 through a communication pipe 22.

[0045] In the above embodiment, the stirring driving member is a motor 21, the output end of the motor 21 is in transmission connection with the secondary shaft 221, so as to drive the stirring shaft 23 to rotate, wherein during the rotation of the secondary shaft 221, the transition cavity of the transition shaft 222 is always in communication with the liquid storage cavity 224 through the communication hole 223, as Figure 3As shown, the plug 225 is in the initial position, at this time, the plug 225 seals the outlet of the liquid storage cavity 224, after the stirring shaft 23 rotates to the required speed, the reaction liquid sprayed from the outlet of the liquid lifting channel 255 impacts the plug 225, thereby moving the plug 225 upward, opening the outlet of the liquid storage cavity 224, and the additives or auxiliary reactants required for the reaction are added through the feeding pipe 5, and then enter the liquid storage cavity 224 through the communication pipe 22 and the transition shaft 222, and are discharged through the outlet of the liquid storage cavity 224. With the rotation of the stirring shaft 23, the additives or auxiliary reactants are also centrifugally dispersed in the reaction liquid through the liquid discharge port 227, mixed with the reaction liquid flowing up and down, and the reaction efficiency is improved.

[0046] Moreover, when the rotation speed of the stirring shaft 23 increases, the extrusion force of the second stirring blade 25 on the reaction liquid increases, which increases the gathering force of the reaction liquid towards the converging hole 254, i.e. the hydraulic pressure of the reaction liquid entering the converging hole 254 increases, which increases the impact force of the reaction liquid sprayed from the outlet of the liquid lifting channel 255 on the stopper 226. Therefore, the opening degree of the outlet of the liquid storage cavity 224 driven by the plug 225 increases, so as to speed up the addition rate of the additives or auxiliary reactants, thereby ensuring that in the case of accelerated mixing by stirring, the addition rate of the additives or auxiliary reactants is accelerated to avoid reaction lag caused by insufficient additives.

[0047] For example, referring to Figure 3 , the lower edge of the liquid discharge port 227 is provided with a flow guide plate 228 fixedly connected with the stirring shaft 23. When the flow guide plate 228 rotates at high speed with the stirring shaft 23, it will generate strong radial centrifugal force, and its surface can form a secondary "boost" to the material thrown out, promoting the material to be dispersed in a large area on the reaction liquid surface.

[0048] For example, referring to Figure 2 and Figure 9 , the side of the stirring shaft 23 is also fixedly provided with a first stirring blade 24, wherein the first stirring blade 24 has a second included angle b between the extension direction and the radial direction of the stirring shaft 23, and the first stirring blade 24 is inclined to the side away from the rotation direction of the stirring shaft 23, i.e. counterclockwise as shown. Figure 9 Therefore, when the first stirring blade 24 stirs the reaction liquid, compared with the conventional way of arranging the stirring blade in the radial direction, it helps to reduce the circumferential resistance of the reaction liquid to the first stirring blade 24.

[0049] And along the rotation direction of the stirring shaft 23, the front side of the first stirring blade 24 is provided with a flow resistance block 241, and the flow resistance block 241 is sawtooth-shaped, as shown in Figure 9As shown, when the reaction liquid flows through the serrated edge of the flow resistance block 241, partial vortex and turbulence (small scale turbulence) are formed at the concave-convex of each serration, breaking the laminar flow state of the liquid, even forming mixing in the local liquid, promoting the contact collision between different components in the local reaction liquid, improving the reaction rate, and the serrated end of the serrated flow resistance block 241 can push the reaction liquid towards the direction close to the stirring shaft 23, reducing the centrifugal force of the reaction liquid, avoiding some heavy raw materials from gathering near the inner wall of the kettle body 1 due to centrifugal force, causing uneven distribution of liquid materials in the reaction liquid near the stirring shaft 23, affecting the reaction rate.

[0050] It should be noted that, as shown in Figure 1 and Figure 2 The kettle body 1 is provided with a temperature control assembly 4, which includes a spiral coil, a heat exchange inlet and a heat exchange outlet. The spiral coil circulates a heat exchange medium. The heat exchange medium enters the spiral coil through the heat exchange inlet and flows out of the spiral coil through the heat exchange outlet. The heat exchange medium is one of hot water, steam and heat conducting oil, so as to heat or cool the reaction liquid in the kettle body 1 by means of the spiral coil to achieve temperature control.

[0051] It should be noted that the liquid product produced by the reaction is discharged through the discharge pipe 26, and the gas product is discharged into a pre-collected container through the exhaust pipe at the upper end of the kettle body 1, which is not limited here.

[0052] On the other hand, the present application also provides a method for using the fluorine chemical purification reaction kettle, comprising the following steps:

[0053] Step one, put multiple reaction liquids required for reaction into the kettle body 1, and drive the stirring shaft 23 to rotate by the stirring driving member;

[0054] Step two, drive the reaction liquid in the bottom area inside the kettle body 1 to enter the liquid lifting channel 255 through the flow concentration hole 254 and be discharged to the area above the liquid level of the reaction liquid through the liquid discharge port 227, so as to realize the flow mixing of the reaction liquid in the kettle body 1 in the vertical direction.

[0055] It should be noted that, in use, the fluorine chemical purification reaction kettle is used by putting multiple reaction materials required for reaction into the kettle body 1, and adjusting the temperature required for reaction by the temperature control assembly 4;

[0056] Start the motor 21, and the second stirring blade 25 rotates synchronously under the rotation of the stirring shaft 23. The reaction liquid is concentrated towards the flow concentration hole 254 under the concentration of the flow concentration groove 251, and then enters the liquid lifting channel 255, and then is discharged through the outlet of the liquid lifting channel 255 to impact on the arc groove 2261 of the resistance rod 226, and then is guided to the liquid discharge port 227 to be thrown out, so as to realize the liquid circulation in the kettle body 1 in the vertical direction.

[0057] Moreover, the impact of the reaction liquid spouted from the outlet of the upflow passage 255 on the rod 226 makes the plug 225 move upward, opening the outlet of the storage cavity 224, so that the additives or reaction aids required by the reaction are added to the reaction liquid, and in order to improve the reaction rate, as the rotation speed of the stirring shaft 23 increases, the impact of the reaction liquid spouted from the outlet of the upflow passage 255 on the rod 226 also increases, so that the opening degree of the plug 225 increases, so as to increase the adding rate of the additives or reaction aids, avoiding the reaction lag caused by the lack of additives;

[0058] In addition, the first stirring blade 24 also rotates with the stirring shaft 23, and a flow resistance block 241 is arranged on the front side of the first stirring blade 24, when the reaction liquid flows through the serrated edge of the flow resistance block 241, partial vortex and turbulence (small scale turbulence) are formed at the concave-convex part of each serration, breaking the laminar flow state of the liquid, even if the liquid is partially mixed, promoting the contact collision between different components in the partial reaction liquid, improving the reaction rate.

[0059] The above embodiments only express several embodiments of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application.

Claims

1. A reaction vessel for fluorine chemical purification, characterized in that, include: The vessel body (1) is equipped with a stirring mechanism (2). The stirring mechanism (2) includes a stirring drive, a stirring shaft (23), and a flow-gathering component. The output end of the stirring drive is connected to the stirring shaft (23). The stirring shaft (23) has a liquid-lifting channel (255) inside. The stirring shaft (23) has a flow-gathering hole (254) on one side of the bottom end inside the vessel body (1). The flow-gathering hole (254) is connected to the inlet of the liquid-lifting channel (255). The stirring shaft (23) has a drain port (227) on the side above the liquid level of the reaction liquid. The drain port (227) is connected to the outlet of the liquid-lifting channel (255). The flow-gathering component is set on one side of the flow-gathering hole (254). The flow-gathering component is used to gather the reaction liquid at the bottom of the vessel body (1) into the flow-gathering hole (254) and move it to the area above the liquid level of the reaction liquid in sequence through the liquid-lifting channel (255) and the drain port (227). The flow-gathering assembly includes a second stirring blade (25), and the stirring shaft (23) has a mounting platform (253) on one side of the bottom end inside the vessel body (1). The flow-gathering hole (254) is opened on the mounting platform (253), and the second stirring blade (25) is located on the rear side of the flow-gathering hole (254). A push rod (226) is provided above the outlet of the liquid riser channel (255). The push rod (226) has an arc groove (2261) at the end facing the outlet of the liquid riser channel (255). The arc groove (2261) protrudes upward and is used to disperse the reaction liquid sprayed from the outlet of the liquid riser channel (255) into the drain port (227). The lower end of the push rod (226) is fixedly connected to a guide rod (229). The end of the guide rod (229) away from the push rod (226) is slidably connected to the stirring shaft (23) and fitted with a spring (2210). The upper end of the push rod (226) is fixedly connected to a plug (225). The plug (225) is located in the liquid storage chamber (224) of the secondary shaft (221). The secondary shaft (221) is fixedly connected to the stirring shaft (23). A connecting hole (223) is provided on the side. A transition shaft (222) is rotatably connected to the outside of the secondary shaft (221). The transition cavity of the transition shaft (222) is connected to the liquid storage cavity (224) of the secondary shaft (221) through the connecting hole (223). The transition shaft (222) is fixedly installed inside the vessel body (1). A feeding pipe (5) is provided on the outside of the vessel body (1). The feeding pipe (5) is connected to the transition cavity of the transition shaft (222) through the connecting pipe (22).

2. The reaction vessel for fluorine chemical purification according to claim 1, characterized in that, The second stirring blade (25) is mounted on the stirring shaft (23) via the mounting platform (253). The extension direction of the second stirring blade (25) has a first angle with the radial direction of the stirring shaft (23). Along the rotation direction of the stirring shaft (23), the second stirring blade (25) is inclined toward the side closer to the rotation direction of the stirring shaft (23). The front end of the second stirring blade (25) is provided with a flow-gathering groove (251).

3. The reaction vessel for fluorine chemical purification according to claim 2, characterized in that, The second stirring blade (25) is fixedly connected to a turntable (256) at one end near the mounting platform (253). The turntable (256) is rotatably connected to the stirring shaft (23). The turntable (256) is fixedly connected to an abutment plate (257) at one end away from the second stirring blade (25). The abutment plate (257) is located inside the stirring shaft (23). The side end of the abutment plate (257) is rubbed against a cam (258). The input end of the cam (258) is connected to a driving member. Along the rotation direction of the stirring shaft (23), the cam (258) is located in front of the abutment plate (257).

4. The reaction vessel for fluorine chemical purification according to claim 3, characterized in that, The lower edge of the drain port (227) is provided with a guide plate (228), and the guide plate (228) is fixedly connected to the stirring shaft (23).

5. The reaction vessel for fluorine chemical purification according to claim 4, characterized in that, The side of the stirring shaft (23) is also fixedly provided with a first stirring blade (24), wherein the extension direction of the first stirring blade (24) has a second included angle with the radial direction of the stirring shaft (23), and along the rotation direction of the stirring shaft (23), the first stirring blade (24) is inclined toward the side away from the rotation direction of the stirring shaft (23).

6. The reaction vessel for fluorine chemical purification according to claim 5, characterized in that, Along the rotation direction of the stirring shaft (23), a flow-blocking block (241) is provided on the front side of the first stirring blade (24), and the flow-blocking block (241) is serrated.

7. The reaction vessel for fluorine chemical purification according to claim 6, characterized in that, The outside of the vessel body (1) is provided with a temperature control component (4), which includes a spiral coil, a heat exchange inlet and a heat exchange outlet. A heat exchange medium flows inside the spiral coil. The heat exchange medium enters the spiral coil from the heat exchange inlet and flows out of the spiral coil from the heat exchange outlet.

8. A method of using a reaction vessel for fluorine chemical purification according to any one of claims 1 to 7, characterized in that, Includes the following steps: Step 1: Add the various reaction liquids required for the reaction into the reactor body (1), and drive the stirring shaft (23) to rotate through the stirring drive component; Step 2: Driven by the rotation of the flow-gathering component along the stirring shaft (23), the reaction liquid in the bottom area of ​​the vessel body (1) enters the liquid-rising channel (255) through the flow-gathering hole (254) and is discharged through the liquid outlet (227) to the area above the liquid level of the reaction liquid, thereby realizing the vertical flow and mixing of the reaction liquid in the vessel body (1).

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