MTA automatic filtering and packaging device

Abstract

According to the automatic MTA filtering and packaging device, MTA mother liquor is filtered, washed and dried through the conical bottom kettle and the condenser, MTA solids are conveyed to the packaging mechanism through the solid material conveying mechanism to be packaged in a sealed mode, the whole process is in a sealed state, generation of foul smell of the surrounding environment during filtering is effectively reduced, and the MTA filtering and packaging efficiency is improved. The device is simple to operate, safe and reliable, the production cost is greatly reduced, personnel contact is reduced, and personnel operation and control program integration are realized.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment, and in particular to an MTA automated filtration and packaging device. Background Technology

[0002] 2-Methyl-3-trifluoromethylaniline (MTA) is an important pharmaceutical and pesticide intermediate, mainly used in the synthesis of analgesics, herbicides, and veterinary anti-inflammatory drugs. It is also a key intermediate in the synthesis of flunixin meglumine. MTA's physical properties are as follows: it is a colorless to light-colored crystalline solid with a melting point of 38-42℃, a boiling point of 198℃, and a density of 1.236 g / cm³. It can form an azeotrope with water. It is flammable, toxic, and has a characteristic aniline odor, which is irritating to the skin, eyes, and mucous membranes.

[0003] The production of MTA generally involves processes such as aminolysis, methylation, catalytic hydrogenation, and hydrolysis.

[0004] After preparation, MTA needs to be separated from the mother liquor. The process involves filtration, extraction, washing, solvent removal distillation, crystallization, secondary filtration, drying, and finally packaging to obtain the MTA product. In existing technologies, the overall equipment in this part of the process is discontinuous. For example, materials need to be transferred from the filter to the dryer frequently, resulting in complex and difficult manual operations, low work efficiency, and the unsealed packaging of the dryer discharge material, which can easily leak out with an odor, impacting the environment and posing significant safety hazards. Utility Model Content

[0005] Therefore, there is a need to provide an automated MTA filtration and packaging device to solve the problems of the lack of continuity in the separation, filtration and packaging process after MTA preparation in the existing technology. For example, the material needs to be transferred from the filter to the dryer, which involves frequent material transfer, complicated and difficult operation by personnel, low work efficiency, and the non-sealed operation of the dryer discharge packaging, which makes the material smelly and easy to overflow, which has an impact on the environment and poses a great safety hazard.

[0006] To achieve the above objectives, this utility model provides an automated MTA filtration and packaging device, comprising:

[0007] The conical bottom vessel is equipped with a stirring mechanism and a spraying mechanism. It has a feed inlet and a drying vacuum port at the top. A conical filter is attached to the inner wall of the vessel. The side walls of the vessel are covered with a jacket. The bottom of the jacket has a heat exchange inlet and the top has a heat exchange outlet. The lower side wall of the vessel has a filtrate outlet and the bottom has a discharge port.

[0008] A condenser is disposed between the drying vacuum port and the filtrate outlet;

[0009] A vacuum pump, which is connected to the drying vacuum port;

[0010] A solid material conveying mechanism is provided with a conveying inlet and a conveying outlet. The conveying inlet is sealed to the outlet and is used to receive the material output from the outlet and convey it forward to the conveying outlet.

[0011] The packaging mechanism has a receiving port that is sealed to the conveying outlet for receiving materials output from the conveying outlet and sealing and packaging them.

[0012] Furthermore, the stirring mechanism includes a first drive motor, a support bracket, a shaft seal, a stirring shaft, and a stirring paddle; the stirring shaft passes through the top center of the conical bottom vessel through the shaft seal and extends to the bottom of the inner cavity of the conical bottom vessel, and its upper end is connected to the first drive motor for transmission; the stirring paddle is disposed on the stirring shaft; the support bracket is fixedly disposed on the top of the conical bottom vessel for supporting the first drive motor.

[0013] Furthermore, the stirring paddle is spiral-shaped.

[0014] Furthermore, the spray pipe of the spraying mechanism is annular and is located in the upper part of the inner cavity of the conical bottom vessel.

[0015] Furthermore, the solid material conveying mechanism includes a second drive motor, a conveying pipe, and an auger. The auger is disposed inside the conveying pipe and its diameter is adapted to the inner diameter of the conveying pipe. One end of the auger is connected to the second drive motor for transmission. The second drive motor drives the auger to rotate, conveying the material from the beginning to the end of the conveying pipe. The conveying inlet is disposed at the top of the beginning of the conveying pipe and at the bottom of the end of the conveying pipe.

[0016] Furthermore, the filter surface of the conical filter is composed of an inner filter plate, a filter medium, and an outer filter plate stacked together.

[0017] Furthermore, it also includes a filtrate storage tank and a vacuum pump. The filtrate storage tank is provided with a collection inlet and a collection outlet. The collection inlet is connected to the filtrate outlet, and the collection outlet is connected to the vacuum pump.

[0018] Furthermore, the packaging mechanism also includes a metering unit.

[0019] Unlike existing technologies, the above technical solution filters, washes, and dries the MTA mother liquor using a conical bottom vessel and a condenser. The solid MTA is then transported to the packaging mechanism for sealing and packaging via a solid material conveying mechanism. The entire process is conducted in a closed system, effectively reducing the generation of odors in the surrounding environment during filtration and achieving the effect of removing odor overflow. The operation is simple, safe, and reliable, significantly reducing production costs, minimizing personnel contact and operation, and integrating the control program. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the MTA automated filtration and packaging device described in a specific embodiment;

[0021] Figure 2 This is a schematic diagram of the conical bottom vessel described in a specific embodiment;

[0022] Figure 3 This is a cross-sectional view of the cone filter described in a specific embodiment;

[0023] Figure 4 This is a schematic diagram of the solid material conveying mechanism and the packaging mechanism described in the specific embodiment;

[0024] Figure 5 The diagram below shows the structure of the MTA automated filtration and packaging device with a filtrate storage tank, as described in a specific embodiment.

[0025] Explanation of reference numerals in the attached figures:

[0026] 10. Conical bottom vessel; 103. Feed inlet; 104. Drying vacuum port; 106. Filtrate outlet; 107. Discharge outlet; 11. Conical filter; 111. Inner filter plate; 112. Filter medium; 113. Outer filter plate; 12. Jacket; 121. Heat exchange inlet; 122. Heat exchange outlet; 13. Stirring mechanism; 131. First drive motor; 132. Support bracket; 133. Shaft seal; 134. Stirring shaft; 135. Stirring paddle; 14. Spraying mechanism; 15. Condenser; 16. Vacuum pump; 17. Solid material conveying mechanism; 171. Second drive motor; 172. Conveying pipe; 173. Screwdriver; 18. Packaging mechanism; 19. Filtrate storage tank. Detailed Implementation

[0027] To explain in detail the technical content, structural features, objectives, and effects of the technical solution, the following description is provided in conjunction with specific embodiments and accompanying drawings.

[0028] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0029] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0030] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0031] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0032] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0033] As understood in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0034] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0035] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0036] Please see Figures 1 to 5 This embodiment provides an automated MTA filtration and packaging device, comprising:

[0037] A conical bottom vessel 10 is provided with a stirring mechanism 13 and a spraying mechanism 14 inside. A feed inlet 103 and a drying vacuum inlet 104 are located at the top. A conical filter 11 is attached to the inner wall of the conical bottom vessel 10. A jacket 12 covers the outer side wall of the conical bottom vessel 10. A heat exchange inlet 121 is located at the bottom of the jacket 12, and a heat exchange outlet 122 is located at the top. A filtrate outlet 106 is located on the lower side wall of the conical bottom vessel 10, and a discharge outlet 107 is located at the bottom.

[0038] The conical-bottom reactor 10 is cone-shaped with the cone tip at the bottom, and the pointed end is cut off to form a round opening for the discharge port 107, which facilitates material sedimentation and filtration, and also allows for bottom discharge. The conical-bottom reactor 10 is typically made of corrosion-resistant, high-temperature-resistant, and high-pressure-resistant stainless steel, such as 304 or 316 stainless steel, to ensure stability and safety under various chemical environments. The MTA crystallization solution is fed into the conical-bottom reactor 10, and then the solid and liquid are separated by pressure filtration, effectively controlling the filtration rate. This ensures both safety and operability. Simultaneously, the exhaust gas from the equipment can be connected to the exhaust gas system to reduce the diffusion of unorganized gases. Finally, the gas is conveyed into the packaging machine for packaging, reducing the exposure of solids and simplifying operation.

[0039] The cone filter 11 is sized and fitted to the conical bottom vessel 10, meaning it fits snugly against the inner wall of the vessel. This helps to isolate the separated mother liquor on the inner wall. The cone filter 11 can be made of various materials, including stainless steel and copper. When the mother liquor containing MTA enters the conical bottom vessel 10, it passes through the filter screen or filter medium, which has pores of a specific size. This allows the mother liquor to pass through while trapping the larger MTA particles on the filter screen surface, achieving solid-liquid separation. The cone-shaped structure of the cone filter 11 facilitates the uniform distribution of the mother liquor and the deposition of MTA, improving filtration efficiency and reducing the risk of clogging. Preferably, the filter surface of the cone filter 11 is composed of an inner filter plate 111, a filter medium 112, and an outer filter plate 113 stacked together, effectively improving filtration efficiency.

[0040] The stirring mechanism 13 is used to mix the mother liquor and materials, and to provide centrifugal force to move the mother liquor outward, thereby improving filtration efficiency. The stirring mechanism 13 can refer to the specific structure of existing technology. Specifically, the stirring mechanism 13 includes a first drive motor 131, a support bracket 132, a shaft seal 133, a stirring shaft 134, and a stirring paddle 135. The stirring shaft 134 passes through the shaft seal 133, penetrates the top center of the conical bottom vessel 10, and extends to the bottom of the inner cavity of the conical bottom vessel 10. Its upper end is connected to the first drive motor 131. The stirring paddle 135 is disposed on the stirring shaft 134. The support bracket 132 is fixedly disposed on the top of the conical bottom vessel 10 to support the first drive motor 131. Other common components are also present, but will not be described in detail here. Preferably, the stirring paddle is spiral-shaped, which can effectively promote the radial flow of the mother liquor, allowing the mother liquor to separate from the MTA solids more quickly and improving filtration efficiency. After separation, the solid portion of the MTA mother liquor deposits on the surface of the conical filter to form a filter cake.

[0041] The spraying mechanism 14 is used to wash the MTA solids after solid-liquid separation. The spraying mechanism 14 typically consists of the following parts: a spray pipe, which is the main body of the spraying mechanism 14. The pipe is arranged in the upper part of the inner cavity of the conical bottom vessel 10, and its arrangement should avoid the stirring mechanism 13. It is used to transport the washing liquid to the nozzles for downward spraying; the nozzles are installed on the spray pipe and are responsible for spraying the liquid in a specific pattern. The design and size of the nozzles can be customized according to the required liquid volume and coverage area; a control valve is used to regulate the liquid flow rate and pressure to ensure that the spraying system operates according to predetermined parameters; and a pressure regulating unit is used to maintain the stable pressure required by the spraying mechanism 14 to ensure the spraying effect. Preferably, the spray pipe of the spraying mechanism 14 is annular. By setting multiple annular spray pipes, the internal space of the conical bottom vessel 10 can be utilized more effectively, improving washing efficiency.

[0042] The condenser 15 is located between the drying vacuum port and the filtrate outlet 106. The condenser 15 is used to cool the mother liquor vapor generated during the drying process. The condenser 15 can be a common type, such as a horizontal shell-and-tube condenser 15, which consists of a shell, tube bundle, end caps, inlet and outlet pipes, etc. The tube bundle is located inside the shell for heat conduction and condensation. Both ends are sealed with end caps, and water-distributing baffles inside the end caps allow for multi-pass flow of cooling water. Refrigerant vapor condenses on the outer surface of the tubes, and cooling water flows inside the tubes under the action of a pump. Refrigerant vapor enters from the upper inlet pipe, condenses into liquid, and flows into the liquid receiver through the liquid outlet pipe at the bottom of the cylinder; or a vertical shell-and-tube condenser 15, which is installed vertically without end caps. The condenser 15 consists of a liquid outlet pipe connector, a pressure gauge connector, an inlet pipe connector, a water distribution tank, and a safety valve connector. Refrigerant vapor enters the outer space of the cylindrical condenser 15 through the inlet pipe located slightly above the middle of the outer shell. The condensed liquid flows downwards along the outer wall of the pipe, collects at the bottom of the condenser 15, and enters the liquid receiver through the liquid outlet pipe. The coaxial condenser 15 is made of two different diameter pipes. One or more smaller diameter pipes are nested inside a larger diameter pipe, then coiled into a serpentine or spiral shape. Refrigerant vapor enters the cavity between the inner and outer pipes from above, condenses on the outer surface of the inner pipe, and the liquid flows downwards sequentially from the bottom of the outer pipe into the liquid receiver. Cooling water enters from the bottom of the condenser 15, flows through each row of inner pipes, and exits from the top, flowing counter-currently to the refrigerant. The plate condenser 15 is composed of a series of metal plates with a certain corrugated shape stacked together. Many small flow channels are formed between the plates, allowing heat exchange between the refrigerant and coolant. The plate condenser 15 is small in size, light in weight, and has high heat transfer efficiency; the evaporative condenser 15 uses water and air as cooling medium. It utilizes the heat absorbed by water during evaporation to condense the refrigerant vapor inside the tube. The water is pumped up and sprayed onto the outer surface of the heat transfer tube by nozzles to form a water film. Part of the water absorbs heat and evaporates into water vapor, which is then carried away by the air entering the condenser 15.

[0043] The vacuum pump 16 is connected to the drying vacuum port 104. It is used to evacuate the interior of the conical bottom vessel 10.

[0044] A solid material conveying mechanism 17 is provided with a conveying inlet and a conveying outlet. The conveying inlet is sealed to the discharge port 107 and is used to receive the material output from the discharge port 107 and convey it forward to the conveying outlet. Specifically, the solid material conveying mechanism 17 includes a second drive motor 171, a conveying pipe 172, and an auger 173. The auger 173 is disposed inside the conveying pipe 172, and the diameter of the auger 173 is adapted to the inner diameter of the conveying pipe 172. One end of the auger 173 is driven to rotate by the second drive motor 171, which drives the auger to rotate, conveying the material from the beginning to the end of the conveying pipe 172. The conveying inlet is located at the top of the beginning end of the conveying pipe 172, and the conveying outlet is located at the bottom of the end end of the conveying pipe 172. The solid material conveying mechanism 17 can convey MTA solids, which facilitates the adjustment and setting of the spatial position of the packaging mechanism 18 and is beneficial to subsequent packaging and transportation work.

[0045] A packaging mechanism 18, whose receiving port is sealed to the conveying outlet, is used to receive materials output from the conveying outlet and seal them for packaging. The packaging mechanism 18 may consist of a packaging bag support and a sealing device, which seals the opening of the packaging material (such as a plastic bag, paper bag, or can) to prevent material leakage and external contamination. Preferably, the packaging mechanism 18 also includes a metering unit, which accurately measures the weight of the material before packaging to ensure that the weight of each package meets a predetermined standard.

[0046] This novel method uses a conical bottom vessel 10 and a condenser 15 to filter, wash, and dry MTA mother liquor. The solid MTA is then transported to a packaging mechanism 18 for sealing and packaging via a solid material conveying mechanism 17. The entire process is conducted in a closed environment, which effectively reduces the generation of odors in the surrounding environment during filtration and achieves the effect of removing odor overflow. The method is simple to operate, safe and reliable, greatly reduces production costs, reduces personnel contact and operation, and features an integrated control program.

[0047] It also includes a filtrate storage tank 19, which has a collection inlet and a collection outlet. The collection inlet is connected to the filtrate outlet 106, and the collection outlet is connected to the vacuum pump 16. After filtration, the filtrate enters the filtrate storage tank 19, and the solid is vacuum dried.

[0048] The following is the specific working principle of this invention: The mother liquor containing MTA solids is fed into the conical bottom vessel 10 through the feed port 103. A vacuum is formed inside the conical bottom vessel 10 through the drying vacuum port 104. Under the action of the stirring mechanism 13, the solids in the mother liquor are deposited on the surface of the conical filter and form a filter cake. The filtrate is discharged through the filtrate outlet 106 and enters the filtrate storage tank 19 through a pipeline for collection. After the filtrate is discharged, the washing liquid is injected into the spraying mechanism 14 to wash the filter cake covering the surface of the conical filter. Then, the vacuum is maintained, and the heating medium is fed into the jacket 12 through the heat exchange inlet. With the turning action of the stirring mechanism 13, the filter cake is fully dried. The residual solvent is cooled by the condenser 15 and enters the filtrate storage tank 19. After vacuum drying for 24 hours, the MTA material enters the solid material conveying mechanism 17 through the discharge port 107 of the conical bottom vessel 10. Then, it is conveyed by the solid material conveying mechanism 17 to the discharge port 107 and falls into the packaging mechanism 18 for metering, dispensing and packaging.

[0049] In some embodiments, a structural frame is also included, with the solid material conveying mechanism 17 fixedly disposed on top of the structural frame and the packaging mechanism 18 disposed below the structural frame. The structural frame is located at the discharge port 107 and the receiving port of the packaging mechanism 18.

[0050] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection for this utility model. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of this utility model, or equivalent structural or procedural transformations made using the content of this utility model's specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of protection of this utility model patent.

Claims

1. An MTA automated filtration and packaging apparatus, characterized by, The application relates to a solid material drying and packaging device. The device comprises a conical bottom kettle, a condenser, a vacuum pump, a solid material conveying mechanism and a packaging mechanism. The conical bottom kettle is internally provided with a stirring mechanism and a spraying mechanism, and is externally provided with a feeding port and a drying vacuum port. The inner wall of the conical bottom kettle is externally provided with a conical filter. The outer wall of the conical bottom kettle is externally provided with a jacket. The bottom of the jacket is provided with a heat exchange inlet, and the top of the jacket is provided with a heat exchange outlet.

2. The MTA automated filtering and packaging apparatus of claim 1, wherein: The lower side wall of the conical bottom kettle is provided with a filtrate outlet, and the bottom of the conical bottom kettle is provided with a discharging port.

3. The MTA automated filtering and packaging apparatus of claim 2, wherein: The condenser is arranged between the drying vacuum port and the filtrate outlet.

4. The MTA automated filtering and packaging apparatus of claim 1, wherein: The vacuum pump is communicated with the drying vacuum port.

5. The MTA automated filtering and packaging apparatus of claim 1, wherein: The solid material conveying mechanism is provided with a conveying inlet and a conveying outlet.

6. The MTA automated filtering and packaging apparatus of claim 1, wherein: The conveying inlet is sealingly connected with the discharging port.

7. The MTA automated filtering and packaging apparatus of claim 1, wherein: The receiving port of the packaging mechanism is sealingly connected with the conveying outlet.

8. The MTA automated filtering and packaging apparatus of claim 1, wherein: The first driving motor, a support bracket, a shaft seal, a stirring shaft and a stirring paddle are arranged in the stirring mechanism. The stirring shaft is arranged through the top center of the conical bottom kettle and extends to the inner cavity bottom of the conical bottom kettle. The upper end of the stirring shaft is drivingly connected with the first driving motor. The support bracket is fixedly arranged on the top of the conical bottom kettle. The stirring paddle is arranged on the stirring shaft. The spraying pipeline of the spraying mechanism is annular and arranged on the upper portion of the inner cavity of the conical bottom kettle. The second driving motor, a conveying pipe and an auger are arranged in the solid material conveying mechanism. The diameter of the auger is matched with the inner diameter of the conveying pipe. One end of the auger is drivingly connected with the second driving motor. The inner filter hole plate, the filter medium and the outer filter hole plate are laminated to form the filter surface of the conical filter. The filtrate storage tank is provided with a collecting inlet and a collecting outlet. The collecting inlet is connected with the filtrate outlet. The collecting outlet is connected with the vacuum pump. The packaging mechanism further comprises a metering unit.

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