An automatic dispensing device

Abstract

This utility model relates to an automatic liquid separation device, including a tank. The top of the tank has an inlet pipe that extends to one side and connects to a recovery pipe. A filter assembly is also provided at the connection between the inlet pipe and the recovery pipe. A stirring shaft is movably installed inside the tank, with multiple stirring rods arranged around it. A heating assembly is also provided inside the stirring shaft and stirring rods. The gas supply pipe of the heating assembly extends to the outside of the tank and connects to a gas storage tank. An exhaust pipe is also provided at the top of the tank, extending outwards and connecting to a collection bottle. This application uses a conical filter element to initially filter particulate impurities in the fluorobenzene solution. Then, by relying on the high-temperature inert gas introduced into the tank, it works in conjunction with the stirring structure to effectively utilize the different boiling points between the impurities and fluorobenzene, collecting them separately in various collection bottles, thereby obtaining a high-purity fluorobenzene solution. This greatly improves the production efficiency of fluorobenzene and the safety of the production process.

Description

Technical Field

[0001] This utility model relates to the technical field of roll material recycling equipment, specifically to an automatic liquid separation device. Background Technology

[0002] Fluorobenzene, an important fluorinated aromatic compound, has wide applications in pharmaceuticals, pesticides, dyes, and polymer materials. It has a boiling point of 84.7℃, a density of 1.024 g / mL, is insoluble in water, and is highly volatile. These physical properties mean that it often forms mixed systems with other substances during its synthesis and application.

[0003] In existing fluorobenzene preparation processes, whether it's the direct fluorination of benzene, the fluorination reaction of diazonium salts, or other organic synthesis routes, the reaction products often contain unreacted raw materials, byproducts, catalysts, and solvents, forming complex fluorobenzene mixed solutions. For example, in the synthesis of pesticide intermediates, fluorobenzene often forms mixed systems with halogenated hydrocarbons such as chlorobenzene and bromobenzene, as well as organic solvents such as diethyl ether and acetone. In the pharmaceutical field, fluorobenzene solutions may contain acidic or basic impurities, metal ions, and high-molecular-weight byproducts. To obtain high-purity fluorobenzene (purity requirements are typically ≥99%) to meet the needs of subsequent reactions or applications, efficient separation and purification operations become crucial.

[0004] Existing fluorobenzene separation equipment has a simple structure and is generally ineffective in handling various mixed impurities, especially when the fluorobenzene solution contains solid particulate impurities (such as catalyst powder and inorganic salt crystals), low-boiling-point impurities (such as diethyl ether - boiling point 34.6℃, acetone - boiling point 56℃), and high-boiling-point impurities (such as o-dichlorobenzene, boiling point 180℃). Therefore, simple filtration and heating cannot meet the requirements for separation and purification of existing fluorobenzene solutions. Furthermore, the temperature control methods in existing separation equipment are too simplistic. Fluorobenzene has a low boiling point, and its boiling point difference with some impurities is small (such as the boiling point difference with acetone is only 28.7℃). Existing devices mostly use external water baths or oil baths for heating, resulting in low temperature control accuracy and uneven heating. This can easily lead to excessive volatilization of fluorobenzene or the formation of azeotropes with impurities, affecting separation efficiency. Utility Model Content

[0005] Based on the above description, this utility model provides an automatic liquid separation device to solve the shortcomings of existing fluorobenzene liquid separation and purification equipment, which has a simple structure, cannot effectively deal with various types of impurities mixed into the fluorobenzene solution, and has a single temperature control method, which cannot effectively and accurately control the temperature, thus affecting the efficiency of liquid separation and purification.

[0006] This utility model is achieved through the following technical solution: An automatic liquid dispensing device includes a tank. The top of the tank is provided with an inlet pipe, which extends to one side and is connected to a recovery pipe. A filter assembly is also provided at the connection between the inlet pipe and the recovery pipe. A stirring shaft is movably installed inside the tank. Multiple stirring rods are arranged around the stirring shaft. A heating assembly is also provided inside the stirring shaft and stirring rods. The gas supply pipe of the heating assembly extends to the outside of the tank and is connected to a gas storage tank. An exhaust pipe is also provided at the top of the tank, which extends outward and is connected to a collection bottle.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the filter assembly includes a cylindrical housing, inside which a filter element with an inverted conical structure is vertically arranged, and a gap is left between the side wall of the filter element and the inner wall of the housing. Both the upper and lower ends of the filter element extend to the outside of the housing to form connection ports.

[0009] Furthermore, both connection ports are equipped with solenoid valves. The connection port located at the top of the filter element is connected to the recovery pipe, and the connection port located at the bottom of the filter element is connected to the discharge pipe. A drain pipe is also provided on one side of the housing and is connected to the inlet pipe.

[0010] Furthermore, the stirring shaft is rotatably connected to the inner top and inner bottom surfaces of the tank via ball bearings, and the surface of the ball bearings is sealed by a sealing gasket. The bottom end of the stirring shaft extends downward and through to the outside of the tank, and a drive wheel is fixedly installed on the outer side wall. A drive motor is provided on one side of the bottom of the tank, and the output end of the drive motor meshes with the drive wheel through a gear structure.

[0011] Furthermore, the heating assembly includes an electric heater and an air pump disposed on the top of the gas storage tank. The gas storage tank stores inert gas and is in communication with the electric heater. The stirring shaft and stirring rod are hollow and interconnected. The stirring rod is also provided with several air holes. The inert gas passes through the electric heater and the air pump and is input into the tank through the air holes.

[0012] Furthermore, both the inlet pipe and the outlet pipe are made of stainless steel, and the horizontal sections of the inlet pipe and the outlet pipe are tightly attached to each other and spirally intertwined.

[0013] Furthermore, a condenser is provided on one side of the tank body, and the input end of the condenser is connected to the exhaust pipe, the output end of the condenser is connected to the collection bottle, and temperature sensors are provided on both the input end and the output end.

[0014] Furthermore, the bottom of the tank is also equipped with a waste liquid pipe that connects to a recycling pool.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: This application improves upon existing fluorobenzene separation and purification equipment by employing a conical filter element for preliminary filtration of particulate impurities in the fluorobenzene solution. This allows for continuous, uninterrupted operation, and subsequent cleaning is achieved simply by opening a solenoid valve to flush the solution with a certain amount of fluorobenzene solution, facilitating continuous separation and filtration. Based on this structure, the high-temperature inert gas introduced into the tank, in conjunction with the stirring mechanism, enhances solution turbulence, promotes phase separation, reduces emulsification, and effectively utilizes the different boiling points of impurities and fluorobenzene. Through high-temperature distillation, these impurities are collected in separate collection bottles, yielding a high-purity fluorobenzene solution. Throughout the equipment's operation, integrated temperature sensors and solenoid valves enable automated control and safety monitoring of the separation process, eliminating the need for human contact and significantly improving production safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the entire liquid separation device in this embodiment; Figure 2 This is a schematic diagram of the structure of the filtering component in this embodiment; Figure 3 This is a schematic diagram of the structure of the stirring shaft and drive motor in this embodiment; Labels: 1. Tank body; 11. Inlet pipe; 12. Exhaust pipe; 2. Filter assembly; 21. Shell; 22. Filter element; 23. Solenoid valve; 24. Drain pipe; 3. Stirring shaft; 31. Stirring rod; 32. Air vent; 33. Drive wheel; 34. Drive motor; 4. Heating assembly; 41. Gas storage tank; 42. Electric heater; 43. Air pump; 5. Condenser. Detailed Implementation

[0017] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0019] Combination Figure 1-3 As shown, an automatic liquid dispensing device includes: Tank 1 is configured as a cylindrical structure, with an inlet pipe 11 and an outlet pipe 12 at the top for inputting fluorobenzene mixture and discharging evaporated solution, respectively. A waste liquid pipe is provided at the bottom for discharging the high-boiling-point organic solution remaining after distillation and purification. All of the above pipes should be equipped with appropriate remotely controllable valves. The filter assembly 2 is located on one side of the housing 21 and is connected to the liquid inlet pipe 11. It is used to perform preliminary filtration of the fluorobenzene solution input into the tank 1 and filter and separate the solid impurities contained therein. The stirring shaft 3 is located inside the tank 1, and multiple sets of stirring rods 31 are arranged around its outer wall. By rotating, the turbulence of the solution is enhanced, phase separation is promoted, and emulsification is reduced. Heating component 4 is located below tank 1. It inputs inert gas with precise temperature control, thereby effectively utilizing the different boiling points of various impurities and fluorobenzene to distill and separate them one by one.

[0020] Specifically, in this embodiment, based on actual application, the fluorobenzene solution is divided into solid particulate impurities, low-boiling-point impurities, and high-boiling-point impurities, thus requiring multiple filtrations for separation.

[0021] Based on this structure, it is necessary to first use physical filtration to separate solid particulate impurities in the fluorobenzene mixture in advance, and in order to ensure filtration efficiency, the filtration structure should be able to operate continuously without interruption.

[0022] The filter assembly 2 includes a cylindrical housing 21. Inside the housing 21, a conical filter element 22 is vertically arranged, and a filter membrane is attached to the inner wall of the filter element 22 to ensure that the filter membrane can completely cover the surface of the filter element 22. At the same time, the upper and lower ends of the filter element 22 extend to the outside of the housing 21 and form connection ports. The connection port located at the top is connected to an external recovery pipe through a flange structure, so as to input the fluorobenzene mixed solution into the filter assembly 2. The connection port located at the bottom is connected to a discharge pipe to collect and separate the filtered particulate impurities and initially separate them from the solution. A drain pipe 24 is provided on the outer wall of the housing 21, and the drain pipe 24 is connected to the inlet pipe 11 at the top of the tank 1 through a flange structure.

[0023] In the above structure, solenoid valves 23 should also be equipped on both connection ports and the drain pipe 24. The solenoid valve 23 is preferably a ZCZPB stainless steel explosion-proof solenoid valve 23, and can be remotely opened and closed through remote electrical connection or Bluetooth module control connection, so as to open the discharge pipe at regular intervals to periodically discharge particulate impurities adhering to the filter membrane, ensuring that the filtration structure can operate continuously without frequent unclogging.

[0024] In addition, the multiple sets of stirring rods 31 on the stirring shaft 3 are arranged in a circumferential array and tilted downwards. The stirring rods 31 are hollow inside the stirring shaft 3 and are interconnected. The bottom end of the stirring shaft 3 extends downwards to the outside of the tank body 1, and a drive wheel 33 is fixedly installed on the side wall extending to the outside. The drive wheel 33 is set as a gear, and a drive motor 34 is correspondingly set at the bottom of the tank body 1. The output end of the drive motor 34 adopts a gear structure and meshes with the drive wheel 33 to drive the stirring rods 31 and the stirring shaft 3 to rotate and stir inside the tank body 1, thereby enhancing the turbulence of the solution, promoting phase separation, and reducing emulsification.

[0025] A ball bearing should be provided at the connection between the stirring shaft 3 and the tank 1, and a sealing gasket should be used on its surface to prevent corrosion and seepage of the fluorobenzene solution and ensure the airtightness of the tank 1. At the same time, a ball bearing is also provided on the inner wall of the bottom end of the stirring shaft 3 so that the external gas injection pipe can be directly inserted into the stirring shaft 3 to supply gas to the inside of the tank 1.

[0026] The heating assembly 4 includes a gas storage tank 41 located at the bottom of the tank body 1. The gas storage tank 41 stores inert gas, and an electric heater 42 and an air pump 43 are equipped on the top of the gas storage tank 41. The electric heater 42 is preferably a SAKAGUCHI electric air heater MCA-1500E3. Through the special structural design of the sheathed heater, precise temperature control can be achieved. The air pump 43 is preferably a diaphragm pump. The reciprocating motion of the diaphragm creates a vacuum and pressure to achieve gas delivery. It has good sealing performance and avoids contamination of the inert gas.

[0027] The above structure has two filtering methods: ① When applied to the production of small-batch fluorobenzene solution with high purity requirements, in this embodiment, it is necessary to use the heating component 4 to perform multiple heating processes to separate and filter impurities with different boiling points.

[0028] Therefore, after the inert gas is precisely temperature-controlled by the electric heater 42, it is preferentially introduced into the tank 1 at a boiling point lower than that of fluorobenzene. The surface of the stirring rod 31 is equipped with several pores 32 to assist in the conveying, which can both expand the coverage area and enhance the heating effect in conjunction with the above-mentioned stirring method. These inert gases directly contact the mixed solution and displace heat, so that the low-boiling-point impurities in the mixed solution are preferentially heated into gas. As the inert gas is discharged, it is conveyed to the collection bottle through the exhaust pipe 12 at the top of the tank 1. A condenser 44 should also be provided between the exhaust pipe 12 and the collection bottle. This condenser 44 is preferably a PN-GC-1 compressor-type condenser 44, so that the low-boiling-point impurities can be re-condensed into liquid state in the future, so as to separate them from the inert gas and then recover them separately.

[0029] After the first distillation step in the above process is fully completed, the temperature of the electric heater 42 is adjusted to be above the boiling point of the fluorobenzene solution and below the boiling point of the high-boiling-point impurities, so as to carry out the second distillation. This distillation can effectively separate the fluorobenzene from the remaining organic solution. The fluorobenzene is cooled into a liquid state by the condenser 44 and then recovered through the collection bottle, while the remaining high-boiling-point impurities are recovered through the waste liquid pipe, thereby achieving the purpose of separation and purification of the fluorobenzene solution.

[0030] In the above structure, various electrically driven components such as electric heater 42, drive motor 34, and solenoid valve 23 should be electrically connected to the control center using wires and remote control modules (such as Bluetooth modules) to facilitate remote operation by staff, avoid direct contact with fluorobenzene solution, and improve the safety of the entire separation and purification process.

[0031] ② When fluorobenzene solutions are mainly used for mass production in industrial applications and require relatively low concentrations, they can be separated in one step.

[0032] In this embodiment, the same components as in Embodiment 1 are still used. On this basis, two condensers 44 should be arranged. The condenser 44 is preferably a PYL205 compressor condenser 44. The condenser 44 has a constant regulation system inside, which can monitor the temperature change in the system in real time and automatically adjust the working state of the compressor and the flow rate of refrigerant according to the preset temperature parameters. It can accurately regulate the temperature and ensure that the measured gas always maintains a constant dew point.

[0033] The electric heater 42 directly inputs inert gas at a temperature higher than that of the fluorobenzene solution, allowing low-boiling-point impurities and fluorobenzene to be simultaneously introduced into the condenser 44 for initial condensation. The condenser 44 controls the cooling efficiency to ensure that the temperature of the first condensation is higher than that of the low-boiling-point impurities but lower than that of fluorobenzene, thus allowing the fluorobenzene to liquefy directly and separate from the low-boiling-point impurities. At this point, the impurities can be collected directly using a collection bottle. Subsequently, the impurities are further cooled by a second condenser 44, which separates the low-boiling-point impurities from the inert gas for collection and processing.

[0034] In this process, in order to make full use of heat, both the exhaust pipe 12 and the infusion pipe should be made of stainless steel and spirally wound together. Alternatively, a double-walled corrugated pipe with dual channels can be used to preheat the solution input into the tank 1 by means of heat transfer. At the same time, the evaporated fluorobenzene can be cooled in advance so that the condenser 44 can condense it into liquid, thereby improving the efficiency of heat utilization.

[0035] In both of the above filtration methods, corresponding recovery and filtration devices should be provided for the inert gas to ensure that the inert gas can be recycled and reduce production costs.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of this utility model.

Claims

1. An automatic dispensing device, characterized by The tank includes a tank body (1), the top of which is provided with an inlet pipe (11), the inlet pipe (11) extends to one side and is connected to a recycling pipe, and a filter assembly (2) is provided at the connection between the inlet pipe (11) and the recycling pipe. A stirring shaft (3) is also movably installed inside the tank body (1), and multiple stirring rods (31) are arranged around the stirring shaft (3). A heating assembly (4) is also provided inside the stirring shaft (3) and the stirring rods (31). The gas supply pipe of the heating assembly (4) extends to the outside of the tank body (1) and is connected to a gas storage tank (41). An exhaust pipe (12) is also provided at the top of the tank body (1), and the exhaust pipe (12) extends outward and is connected to a collection bottle.

2. The automatic dispensing apparatus as claimed in claim 1, wherein The filter assembly (2) includes a cylindrical housing (21), inside which a filter element (22) with an inverted conical structure is vertically arranged, and there is a gap between the side wall of the filter element (22) and the inner wall of the housing (21). Both the upper and lower ends of the filter element (22) extend to the outside of the housing (21) to form connection ports.

3. The automatic dispensing apparatus as claimed in claim 2, wherein Solenoid valves (23) are provided on both of the connection ports. The connection port located at the top of the filter element (22) is connected to the recovery pipe, and the connection port located at the bottom of the filter element (22) is connected to the discharge pipe. A drain pipe (24) is also provided on one side of the housing (21) and is connected to the inlet pipe (11).

4. The automatic dispensing apparatus as claimed in claim 3, wherein The stirring shaft (3) is rotatably connected to the inner top and inner bottom surfaces of the tank (1) via ball bearings, and the surface of the ball bearings is sealed by a sealing gasket. The bottom end of the stirring shaft (3) extends downward and passes through to the outside of the tank (1), and a drive wheel (33) is fixedly installed on the outer side wall. A drive motor (34) is provided on one side of the bottom of the tank (1), and the output end of the drive motor (34) meshes with the drive wheel (33) through a gear structure.

5. The automatic dispensing apparatus as claimed in claim 4, wherein The heating assembly (4) includes an electric heater (42) and an air pump (43) disposed on the top of the gas storage tank (41). The gas storage tank (41) stores inert gas and is connected to the electric heater (42). The stirring shaft (3) and the stirring rod (31) are hollow inside and connected to each other. The stirring rod (31) is also provided with several air holes (32). The inert gas passes through the electric heater (42) and the air pump (43) and is input into the tank body (1) through the air holes (32).

6. The automatic dispensing apparatus as claimed in claim 5, wherein Both the inlet pipe (11) and the outlet pipe (12) are made of stainless steel, and the horizontal sections of the inlet pipe (11) and the outlet pipe (12) are closely attached to each other and spirally intertwined.

7. The automatic dispensing apparatus as claimed in claim 6, wherein A condenser (44) is also provided on one side of the tank (1), and the input end of the condenser (44) is connected to the exhaust pipe (12), the output end of the condenser (44) is connected to the collection bottle, and a temperature sensor is provided on both the input end and the output end.

8. The automatic dispensing apparatus as claimed in claim 1, wherein The bottom of the tank (1) is also provided with a waste liquid pipe and connected to the recycling pool.

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