A solvent recovery device for solution preparation

Abstract

The application provides a solution preparation solvent recovery device, belonging to the technical field of solvent recovery. The solution preparation solvent recovery device comprises a recovery structure and a filtering structure. The recovery structure comprises a distillation kettle, a receiving tank, a condenser, a feeding pipe, a vacuum pump, an indicating assembly and a bottom frame supporting each element. The number of the feeding pipes is two, and the two feeding pipes are respectively located at the top of the distillation kettle and the receiving tank. In the application, when raw materials are added to the inside of the distillation kettle, it is not necessary to filter the raw materials by using other equipment before feeding. It is only necessary to ensure that the raw materials pass through the filtering box during the addition, so that the reaction byproducts, catalyst residues, unreacted raw materials and other impurities in the raw materials can be directly filtered out. At the same time, the filtered impurities can be conveniently taken out and cleaned, the labor intensity of workers is reduced, and the equipment blockage and solvent pollution can be prevented.

Description

Technical Field

[0001] This application relates to the field of solvent recovery technology, and more specifically, to a solvent recovery device for solution preparation. Background Technology

[0002] 4-Isopropylpyridinemethyldiphenylborone is a novel organoboron antifouling agent that inhibits the attachment of marine organisms such as succulents and algae, thereby achieving antifouling functions for ship hulls and marine facilities. In the synthesis of 4-isopropylpyridinemethyldiphenylborone and its series of organoboron antifouling agents, toluene is a commonly used solvent, and its recovery is a critical step, which is not only related to the control of production costs, but also directly affects the environmental protection and sustainability of the production process.

[0003] Toluene solvent recovery typically employs a distillation process, where toluene is vaporized from the reaction mixture by heating and then condensed back into a liquid solvent. However, in actual production, when feeding materials into the still, impurities such as reaction byproducts, catalyst residues, and unreacted raw materials may be dissolved or suspended in the toluene solvent. If raw materials containing impurities are directly added to the still, these impurities may enter the distillation system along with the toluene, leading to equipment blockage and solvent contamination. Furthermore, improper solvent feeding can result in uneven distribution of the raw materials within the still, easily causing localized overheating and low distillation efficiency, significantly impacting toluene recovery and product quality. Utility Model Content

[0004] To overcome the above deficiencies, this application provides a solvent recovery device for solution preparation, which aims to improve the problem that toluene solvent may contain dissolved or suspended impurities such as reaction byproducts, catalyst residues, and unreacted raw materials. If raw materials containing impurities are directly added to the distillation apparatus, the impurities may enter the distillation system with the toluene, leading to equipment blockage and solvent contamination.

[0005] This application provides a solvent recovery device for solution preparation, including a recovery structure and a filtration structure. The recovery structure includes a distillation kettle, a receiving tank, a condenser, a feed pipe, a vacuum pump, an indicating component, and a base frame supporting each component. There are two feed pipes, which are located at the top of the distillation kettle and the receiving tank, respectively. The filtration structure includes a fixed frame, a filter box, a rotating column, a stirring blade, and a rotating component that drives the rotating column to rotate. The fixed frame is fixedly connected to the inner cavity of the distillation kettle, and the filter box is detachably connected to the inner cavity of the fixed frame. The rotating column is located at the bottom of the fixed frame, and its top and bottom are movably connected to the bottom of the fixed frame and the inner wall of the distillation kettle, respectively, via bearings. The stirring blade is fixedly connected to both sides of the rotating column.

[0006] In one specific implementation, one end of each of the two feed pipes is fixedly connected to the top of the distillation vessel lid and the top of the receiving tank, respectively, and the other end is fixedly connected to the inlet and outlet of the condenser, respectively. The output end of the vacuum pump is connected to the vacuum interface of the distillation vessel through a pipe.

[0007] In the above process, the feed pipe at the top of the distillation vessel is a flexible pipe. The two feed pipes are used to transport steam and condensed liquid, respectively. The vacuum pump is used to reduce the pressure inside the distillation vessel, so that toluene vaporizes at a lower temperature and reduces the risk of thermal decomposition.

[0008] In one specific embodiment, the indicating component includes a temperature sensor and a liquid level sensor, the temperature sensor being fixedly connected to the top of the distillation vessel lid, the liquid level sensor being fixedly connected to the bottom of the liquid level sensor, and the probes of the temperature sensor and the liquid level sensor extending into the interior of the distillation vessel and the receiving tank, respectively.

[0009] In the above implementation process, a temperature sensor is used to detect the temperature inside the recycling structure, and a liquid level sensor is used to detect the liquid level inside the receiving tank.

[0010] In one specific implementation, the indicating component further includes a support plate and indicator lights. The support plate is fixedly connected to the front of the base frame. Labels for marking the temperature and liquid level corresponding to the indicator lights are provided on the upper and lower surfaces of the support plate. There are two sets of indicator lights, located above and below the support plate, respectively, and each set of indicator lights consists of a red LED and a green LED.

[0011] In the above implementation process, the support plate is used to support and fix the various components on the surface. The two sets of indicator lights correspond to the temperature in the distillation vessel and the liquid level in the receiving tank, respectively. Green indicates that the liquid level and temperature are low, while red indicates that the liquid level is high and needs to be discharged in time, and that the distillation vessel should not be opened when the temperature is high.

[0012] In one specific implementation, the indicating component further includes a microcontroller, which is fixedly connected to the center of the support plate. The outputs of the temperature sensor and the liquid level sensor are both connected to the input of the microcontroller, and the output of the microcontroller is connected to the input of the indicator light.

[0013] In the above implementation process, the microcontroller is used to receive electrical signals from the temperature sensor and the liquid level sensor, and control the opening and closing of two sets of LEDs of different colors according to the signals. The green light is on when the range is normal, and the red light is on when the range is abnormal, so as to provide more intuitive prompts for the staff.

[0014] In one specific implementation, the surface of the receiving tank is fixedly connected to a discharge pipe for discharging solvent, and the surface of the discharge pipe is provided with a control valve for controlling the solvent discharge efficiency.

[0015] In the above process, the discharge pipe is used to discharge the toluene solvent recovered inside the receiving tank, and it can also be added back into the distillation kettle for re-distillation to further improve the purity.

[0016] In one specific implementation, a positioning piece is fixedly connected to the top of the filter box to prevent the filter box from falling out of the fixed frame, and auxiliary pieces for picking up the positioning piece are fixedly connected to both sides of the positioning piece.

[0017] During the above process, staff can easily remove the filter box from the fixed frame using an auxiliary plate to clean the filtered impurities.

[0018] In one specific implementation, the rotating component is a first handle for manually rotating the rotating column. The first handle is located above the fixed frame, and the top of the rotating column passes through the fixed frame and is fixedly connected to the bottom of the first handle.

[0019] In the above process, by manually rotating the No. 1 handle, the rotating column can be driven to rotate, so that the stirring blade can stir the solution in the distillation vessel, ensuring that the raw materials are evenly distributed, thereby improving the heating effect. This method is more energy-efficient.

[0020] In one specific implementation, the rotating component is a primary motor for mechanically driving the rotating column to rotate. The primary motor is fixedly connected to the bottom of the distillation vessel, and the output shaft of the primary motor passes through the distillation vessel and is connected to the bottom of the rotating column for transmission.

[0021] In the above process, the rotating column is driven by motor No. 1, which enables the stirring blades to stir the solution in the distillation vessel, making this method more convenient.

[0022] In one specific implementation, the rotating assembly consists of a second handle and a second motor that can simultaneously drive the rotating column to rotate in two ways. The second handle is located above the fixed frame, and the top of the rotating column passes through the fixed frame and is fixedly connected to the bottom of the second handle. The second motor is fixedly connected to the bottom of the distillation vessel, and the output shaft of the second motor passes through the distillation vessel and is drivenly connected to the bottom of the rotating column.

[0023] In the above implementation process, both manually turning the No. 2 handle and starting the No. 2 motor can drive the rotating column to rotate. The No. 2 handle can be used as a backup option when the No. 2 motor cannot operate normally. At the same time, the No. 2 motor must be a non-self-locking motor.

[0024] Compared with the prior art, the beneficial effects of this application are as follows: When adding raw materials into the distillation vessel, there is no need to use other equipment to filter the raw materials before adding them. It is only necessary to ensure that the raw materials pass through the filter box during addition, so that impurities such as reaction by-products, catalyst residues, and unreacted raw materials in the raw materials can be directly filtered out. At the same time, it is easy to remove and clean the filtered impurities, which reduces the labor intensity of the staff and also prevents equipment blockage and solvent contamination. After adding the raw materials, they can be mixed to ensure that the raw materials are evenly added into the interior of the distillation vessel, ensuring that the raw materials are evenly distributed and preventing local overheating and low distillation efficiency. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of a solvent recovery device for solution preparation provided in an embodiment of this application;

[0027] Figure 2 This is a cross-sectional view of the distillation vessel of this utility model;

[0028] Figure 3 This is a schematic diagram of the separation structure of the fixing frame and the filter box of this utility model;

[0029] Figure 4 This is a schematic diagram of the overall structure of Embodiment 1 of the present utility model;

[0030] Figure 5 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model;

[0031] Figure 6 This is a schematic diagram of the overall structure of Embodiment 3 of this utility model;

[0032] Figure 7 This is a bottom view of the structure of this utility model;

[0033] Figure 8 This is a front view structural diagram of the support plate of this utility model.

[0034] In the diagram: 10, recovery structure; 110, distillation kettle; 120, receiving tank; 130, condenser; 140, feed pipe; 150, vacuum pump; 160, indicating component; 1601, temperature sensor; 1602, liquid level sensor; 1603, support plate; 1604, indicator light; 1605, microcontroller; 20, filtration structure; 210, fixing frame; 220, filter box; 2201, positioning plate; 230, rotating column; 240, stirring blade; 201a, handle No. 1; 202a, motor No. 1; 201b, handle No. 2; 202b, motor No. 2. Detailed Implementation

[0035] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0036] In the description of the embodiments of this utility model, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of 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. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0038] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0039] The following disclosure provides many different implementations or examples for different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0040] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed account of a solvent recovery device for solution preparation according to this utility model.

[0041] Please see Figure 1 , Figure 2 and Figure 3 This application provides a solvent recovery device for solution preparation, including a recovery structure 10 and a filtration structure 20. The recovery structure 10 includes a distillation vessel 110, a receiving tank 120, a condenser 130, a feed pipe 140, a vacuum pump 150, an indicator component 160, and a base frame supporting each component. There are two feed pipes 140, and the two feed pipes 140 are respectively located at the top of the distillation vessel 110 and the receiving tank 120. The filtration structure 20 includes a fixed frame 210, a filter box 220, a rotating column 230, a stirring blade 240, and a rotating component that drives the rotating column 230 to rotate. The fixed frame 210 is fixedly connected to the inner cavity of the distillation vessel 110, and the filter box 220 is detachably connected to the inner cavity of the fixed frame 210. The rotating column 230 is located at the bottom of the fixed frame 210, and its top and bottom are movably connected to the bottom of the fixed frame 210 and the inner wall of the distillation vessel 110 respectively through bearings. The stirring blade 240 is fixedly connected to both sides of the rotating column 230.

[0042] In the specific setup, one end of each of the two feed pipes 140 is fixedly connected to the top of the cover of the distillation vessel 110 and the top of the receiving tank 120, respectively, and the other end is fixedly connected to the inlet and outlet of the condenser 130, respectively. The output end of the vacuum pump 150 is connected to the vacuum interface of the distillation vessel 110 through a pipe. The feed pipe 140 at the top of the distillation vessel 110 is a flexible pipe. The two feed pipes 140 are used to transport steam and condensed liquid, respectively. The vacuum pump 150 is used to reduce the pressure inside the distillation vessel 110, so that toluene vaporizes at a lower temperature and reduces the risk of thermal decomposition.

[0043] In a specific configuration, the indicating component 160 includes a temperature sensor 1601 and a liquid level sensor 1602. The temperature sensor 1601 is fixedly connected to the top of the cover of the distillation vessel 110, and the liquid level sensor 1602 is fixedly connected to the bottom of the liquid level sensor 1602. The probes of the temperature sensor 1601 and the liquid level sensor 1602 extend into the interior of the distillation vessel 110 and the receiving tank 120, respectively. The temperature sensor 1601 is used to detect the temperature inside the recovery structure 10, and the liquid level sensor 1602 is used to detect the liquid level inside the receiving tank 120.

[0044] In specific configuration, the indicator component 160 also includes a support plate 1603 and indicator lights 1604. The support plate 1603 is fixedly connected to the front of the base frame. Labels for marking the temperature and liquid level corresponding to the indicator lights 1604 are provided on the upper and lower surfaces of the support plate 1603. There are two sets of indicator lights 1604, located above and below the support plate 1603 respectively. Each set of indicator lights 1604 consists of a red LED and a green LED. The support plate 1603 is used to support and fix the various components on the surface. The two sets of indicator lights 1604 correspond to the temperature in the distillation vessel 110 and the liquid level in the receiving tank 120 respectively. Green indicates that the liquid level and temperature are low, red indicates that the liquid level is high and needs to be drained in time, and red indicates that the temperature is high and the distillation vessel 110 should not be opened.

[0045] In specific settings, the indicator component 160 also includes a microcontroller 1605, which is fixedly connected to the center of the support plate 1603. The output terminals of the temperature sensor 1601 and the liquid level sensor 1602 are both connected to the input terminal of the microcontroller 1605. The output terminal of the microcontroller 1605 is connected to the input terminal of the indicator light 1604. The microcontroller 1605 is used to receive electrical signals from the temperature sensor 1601 and the liquid level sensor 1602, and controls the opening and closing of two sets of LEDs of different colors according to the signals. The green light is on when the signal is within the normal range, and the red light is on when the signal is in the abnormal range, so as to provide more intuitive prompts for the staff.

[0046] In a specific configuration, a discharge pipe for discharging solvent is fixedly connected to the surface of the receiving tank 120, and a control valve for controlling the solvent discharge efficiency is provided on the surface of the discharge pipe. The discharge pipe is used to discharge the toluene solvent recovered inside the receiving tank 120, and it can also be added back into the distillation kettle 110 for re-distillation to further improve the purity.

[0047] In the specific setup, a positioning piece 2201 is fixedly connected to the top of the filter box 220 to prevent the filter box 220 from falling out of the fixed frame 210, and auxiliary pieces for picking up the positioning piece 2201 are fixedly connected to both sides of the positioning piece 2201. The staff can easily take the filter box 220 out of the fixed frame 210 through the auxiliary pieces so as to clean the filtered impurities.

[0048] like Figure 4 As shown, this is the first embodiment of the rotating assembly. The rotating assembly is a first handle 201a for manually rotating the rotating column 230. The first handle 201a is located above the fixed frame 210, and the top of the rotating column 230 passes through the fixed frame 210 and is fixedly connected to the bottom of the first handle 201a. By manually rotating the first handle 201a, the rotating column 230 can be driven to rotate, so that the stirring blade 240 can stir the solution in the distillation vessel 110, ensuring that the raw materials are evenly distributed, thereby improving the heating effect. This method is more energy-efficient.

[0049] like Figure 5 As shown, this is the second embodiment of the rotating assembly. The rotating assembly is a primary motor 202a for mechanically driving the rotating column 230 to rotate. The primary motor 202a is fixedly connected to the bottom of the distillation vessel 110, and the output shaft of the primary motor 202a passes through the distillation vessel 110 and is connected to the bottom of the rotating column 230 for transmission. By driving the rotating column 230 to rotate through the primary motor 202a, the stirring blade 240 can stir the solution in the distillation vessel 110. This method is more convenient.

[0050] like Figure 6 As shown, this is the third embodiment of the rotating assembly. The rotating assembly consists of a second handle 201b and a second motor 202b, which can simultaneously drive the rotating column 230 to rotate in two ways. The second handle 201b is located above the fixed frame 210, and the top of the rotating column 230 passes through the fixed frame 210 and is fixedly connected to the bottom of the second handle 201b. The second motor 202b is fixedly connected to the bottom of the distillation vessel 110, and the output shaft of the second motor 202b passes through the distillation vessel 110 and is drivenly connected to the bottom of the rotating column 230. Manually rotating the second handle 201b and starting the second motor 202b can both drive the rotating column 230 to rotate. The second handle 201b can be used as a backup when the second motor 202b cannot operate normally. At the same time, the second motor 202b must be a non-self-locking motor.

[0051] The working principle of the solvent recovery device for solution preparation is as follows: During feeding, the raw material is added to the interior of the distillation vessel 110 through the filter box 220, which filters the raw material and removes impurities. The filtered impurities accumulate inside the filter box 220. Removing the filter box 220 allows for cleaning of the impurities. During the feeding process, the rotating component in the first, second, and third embodiments drives the rotating column 230 to rotate, causing the stirring blades 240 to stir the raw material, ensuring uniform distribution. After feeding is complete, the top cover of the distillation vessel 110 is closed, and the distillation vessel 110 is started. The raw materials are heated, and the distillation vessel 110 vaporizes toluene from the reaction mixture through heating, achieving preliminary separation from high-boiling-point impurities. The toluene vapor is conveyed to the condenser 130 through the feed pipe 140 at the top of the distillation vessel 110 and condensed into liquid. The toluene liquid is then conveyed to the inside of the receiving tank 120 through another feed pipe 140, where the recovered toluene solution is stored. At the same time, when vacuum distillation is required, the pressure inside the distillation vessel 110 can be reduced by starting the vacuum pump 150, so that the toluene vaporizes at a lower temperature, reducing the risk of thermal decomposition.

[0052] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A solvent recovery device for solution preparation, characterized in that, include The recovery structure (10) includes a distillation vessel (110), a receiving tank (120), a condenser (130), a feed pipe (140), a vacuum pump (150), an indicator assembly (160), and a base frame supporting each component. There are two feed pipes (140), and the two feed pipes (140) are located on the top of the distillation vessel (110) and the receiving tank (120), respectively. The filter structure (20) includes a fixed frame (210), a filter box (220), a rotating column (230), a stirring blade (240), and a rotating assembly that drives the rotating column (230) to rotate. The fixed frame (210) is fixedly connected to the inner cavity of the distillation vessel (110). The filter box (220) is detachably connected to the inner cavity of the fixed frame (210). The rotating column (230) is located at the bottom of the fixed frame (210), and its top and bottom are movably connected to the bottom of the fixed frame (210) and the inner wall of the distillation vessel (110) respectively through bearings. The stirring blade (240) is fixedly connected to both sides of the rotating column (230).

2. The solvent recovery device for solution preparation according to claim 1, characterized in that, One end of each of the two feed pipes (140) is fixedly connected to the top of the cover of the distillation vessel (110) and the top of the receiving tank (120), respectively, and the other end is fixedly connected to the inlet and outlet of the condenser (130), respectively. The output end of the vacuum pump (150) is connected to the vacuum interface of the distillation vessel (110) through a pipe.

3. The solvent recovery device for solution preparation according to claim 1, characterized in that, The indicating component (160) includes a temperature sensor (1601) and a liquid level sensor (1602). The temperature sensor (1601) is fixedly connected to the top of the cover of the distillation vessel (110), and the liquid level sensor (1602) is fixedly connected to the bottom of the liquid level sensor (1602). The probes of the temperature sensor (1601) and the liquid level sensor (1602) extend into the interior of the distillation vessel (110) and the receiving tank (120), respectively.

4. The solvent recovery device for solution preparation according to claim 3, characterized in that, The indicator component (160) also includes a support plate (1603) and indicator lights (1604). The support plate (1603) is fixedly connected to the front of the base frame. Labels for marking the temperature and liquid level corresponding to the indicator lights (1604) are provided on the upper and lower surfaces of the support plate (1603). There are two sets of indicator lights (1604), located above and below the support plate (1603) respectively, and each set of indicator lights (1604) consists of a red LED and a green LED.

5. The solvent recovery device for solution preparation according to claim 4, characterized in that, The indicator component (160) also includes a microcontroller (1605), which is fixedly connected to the center of the support plate (1603). The output terminals of the temperature sensor (1601) and the liquid level sensor (1602) are both connected to the input terminal of the microcontroller (1605), and the output terminal of the microcontroller (1605) is connected to the input terminal of the indicator light (1604).

6. The solvent recovery device for solution preparation according to claim 1, characterized in that, The surface of the receiving tank (120) is fixedly connected to a discharge pipe for discharging solvent, and the surface of the discharge pipe is provided with a control valve for controlling the solvent discharge efficiency.

7. The solvent recovery device for solution preparation according to claim 1, characterized in that, The top of the filter box (220) is fixedly connected to a positioning piece (2201) to prevent the filter box (220) from falling out of the fixed frame (210), and auxiliary pieces for picking up the positioning piece (2201) are fixedly connected to both sides of the positioning piece (2201).

8. The solvent recovery device for solution preparation according to claim 1, characterized in that, The rotating component is a first handle (201a) for manually rotating the rotating column (230). The first handle (201a) is located above the fixed frame (210), and the top of the rotating column (230) passes through the fixed frame (210) and is fixedly connected to the bottom of the first handle (201a).

9. A solvent recovery device for solution preparation according to claim 1, characterized in that, The rotating component is a No. 1 motor (202a) for mechanically driving the rotating column (230) to rotate. The No. 1 motor (202a) is fixedly connected to the bottom of the distillation vessel (110), and the output shaft of the No. 1 motor (202a) passes through the distillation vessel (110) and is connected to the bottom of the rotating column (230) for transmission.

10. A solvent recovery device for solution preparation according to claim 1, characterized in that, The rotating assembly consists of a second handle (201b) and a second motor (202b) that can simultaneously drive the rotating column (230) to rotate in two ways. The second handle (201b) is located above the fixed frame (210), and the top of the rotating column (230) passes through the fixed frame (210) and is fixedly connected to the bottom of the second handle (201b). The second motor (202b) is fixedly connected to the bottom of the distillation vessel (110), and the output shaft of the second motor (202b) passes through the distillation vessel (110) and is drivenly connected to the bottom of the rotating column (230).

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