An apparatus for synthesizing a mesosulfocarb intermediate

Abstract

The utility model relates to mesosulfuron-methyl synthetic technical field, specifically disclose a device for synthesizing mesosulfuron-methyl intermediate, including the filter jar of horizontal arrangement, the inside installation of filter jar is used for the filter screen board of separating solid and liquid, the left end intercommunication of filter jar has the feed pipe, the downside intercommunication of filter jar has the discharge pipe of being located filter screen board right side, be provided with the washing mechanism for the cleaning of solid after separating on filter jar, and the washing mechanism includes the L type board of fixed connection in filter jar outer wall, pressure transmitter real -time monitoring jar pressure, reach the signal transmission to PLC controller when setting threshold value, and the PLC controller opens the liquid outlet pipe valve immediately, makes the washing liquid from filter screen board clean side reverse penetration, and the waste liquid is discharged to collect to the solid that peels off forms, thereby realizes the automatic cleaning and collection to the solid that intercepts, effectively reduces the labor intensity, improves production efficiency, and avoids the tedious process of disassembling filter screen board, and simple and convenient operation.

Description

Technical Field

[0001] This utility model relates to the field of metsulfuron-methyl synthesis technology, and specifically discloses an apparatus for synthesizing metsulfuron-methyl intermediates. Background Technology

[0002] Metsulfuron-methyl is an important sulfonylurea herbicide. Its synthesis involves multiple reaction steps and often generates various intermediates. In the post-processing of these intermediates, especially key intermediates such as 2-amino-N-(2,6-dichloro-p-tolyl)propionamide, it is often necessary to separate them from the reaction mother liquor through crystallization, precipitation, or other methods. The core of this step is to achieve efficient and complete separation of the solid intermediate crystals from the organic solvent mother liquor. In this process, the performance of the solid-liquid separation unit directly affects the product yield, purity, and the continuity and efficiency of the entire production process.

[0003] In existing technologies, filter tanks with built-in metal filter screens are commonly used for the aforementioned solid-liquid separation operations. However, this technology has significant drawbacks: after filtration, the solids trapped on the screens require manual cleaning. Specifically, operators need to disassemble the equipment flanges or blind flanges and use tools to scrape or even remove the tightly adhered filter cake. This process is not only labor-intensive and inefficient, but also extremely cumbersome when the filter screens become clogged due to the penetration of fine crystals, requiring complete removal and thorough cleaning.

[0004] Therefore, an apparatus for synthesizing mesotrione intermediates is needed to solve the above problems. Utility Model Content

[0005] This invention proposes an apparatus for synthesizing mesotrione intermediates, which can automatically clean and collect solids trapped on the filter screen, reducing labor intensity, improving production efficiency, and avoiding the cumbersome process of disassembling the filter screen. It is simple and convenient to operate.

[0006] This invention is implemented as follows: an apparatus for synthesizing mesotrione intermediates includes a horizontally arranged filter tank, inside which a filter screen for separating solids and liquids is installed; a feed pipe is connected to the left end of the filter tank; and a discharge pipe located to the right of the filter screen is connected to the lower side of the filter tank.

[0007] The filter tank is equipped with a rinsing mechanism for cleaning the separated solids. The rinsing mechanism includes an L-shaped plate fixedly connected to the outer wall of the filter tank. A centrifugal pump is installed on the outer wall of the L-shaped plate. An inlet pipe communicating with the filter tank is installed at the outlet of the centrifugal pump. An outlet pipe located to the left of the filter screen is connected to the lower side of the filter tank. A first electric valve is provided on both the inlet pipe and the outlet pipe. A second electric valve is provided on both the feed pipe and the discharge pipe.

[0008] A collection mechanism is provided at the opening on the lower side of the liquid outlet pipe to collect the solids discharged from the liquid outlet pipe.

[0009] As a preferred embodiment of the apparatus for synthesizing mesotrione intermediates according to this utility model, the collection mechanism includes a connecting cover fixedly connected to the outer wall of the outlet pipe, a collection bucket threadedly connected to the inner wall of the connecting cover, a retaining mesh plate installed inside the collection bucket, a sealing gasket provided at the top of the inner wall of the connecting cover, the sealing gasket abutting against the upper edge of the collection bucket, and a discharge port connected to the lower side of the collection bucket.

[0010] As a preferred embodiment of the apparatus for synthesizing mesotrione intermediates according to the present invention, a tube is fixedly connected to the upper end of the filter tank, and a pressure transmitter is provided inside the tube, with the detection end of the pressure transmitter extending into the filter tank.

[0011] A vertical plate is installed at the upper end of the L-shaped plate, and an operation panel and a PLC controller are installed on the outer wall of the vertical plate.

[0012] As a preferred embodiment of the apparatus for synthesizing mesotrione intermediates according to this invention, both the feed pipe and the discharge pipe are provided with flanges at the ends away from the filter tank.

[0013] In a preferred embodiment of this invention, the sealing gasket is made of fluororubber, used in the synthesis of a mesotrione intermediate.

[0014] As a preferred embodiment of the apparatus for synthesizing mesotrione intermediates according to this invention, the outer wall of the collection tank is equipped with multiple handles.

[0015] The beneficial effects of this utility model are:

[0016] First, open the second electric valves on the feed pipe and discharge pipe, and close the first electric valves on the liquid inlet pipe and liquid outlet pipe, allowing the suspension to re-enter the filter tank. The liquid passes through the filter screen to achieve solid-liquid separation, with the solids trapped on the left side of the filter screen. During cleaning, close the second electric valves on the feed pipe and discharge pipe, and open the first electric valve on the liquid inlet pipe. The pressure transmitter monitors the pressure inside the tank in real time. When the set threshold is reached, the signal is transmitted to the PLC controller. The PLC controller then opens the liquid outlet valve, allowing the rinsing liquid to penetrate from the clean side of the filter screen in the reverse direction, peeling off the solids to form waste liquid which is then discharged and collected. This achieves automatic cleaning and collection of trapped solids, effectively reducing labor intensity, improving production efficiency, and avoiding the cumbersome process of disassembling the filter screen. The operation is simple and convenient. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 This is a front cross-sectional view of the apparatus for synthesizing mesotrione intermediates according to the present invention.

[0019] Figure 2 This is a structural diagram of the filter tank of this utility model;

[0020] Figure 3 This is a structural diagram of the connecting cover and sealing gasket of this utility model;

[0021] Figure 4 This is a structural diagram of the collection bucket of this utility model.

[0022] The markings in the diagram are: 1. Filter tank; 2. Feed pipe; 3. Discharge pipe; 4. Filter screen; 5. Second electric valve; 6. Flange; 7. L-shaped plate; 8. Centrifugal pump; 9. Liquid inlet pipe; 10. Liquid outlet pipe; 11. First electric valve; 12. Connecting cover; 13. Collection tank; 14. Sealing gasket; 15. Intercepting screen; 16. Discharge port; 17. Vertical plate; 18. Control panel; 19. PLC controller; 20. Pipe sleeve; 21. Pressure transmitter. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0024] Please see Figure 1-4An apparatus for synthesizing mesotriamine intermediates includes a horizontally arranged filter tank 1, with a filter screen 4 for separating solids and liquids installed inside the filter tank 1. A feed pipe 2 is connected to the left end of the filter tank 1, and a discharge pipe 3 located to the right of the filter screen 4 is connected to the lower side of the filter tank 1.

[0025] The filter tank 1 is equipped with a rinsing mechanism for cleaning the separated solids. The rinsing mechanism includes an L-shaped plate 7 fixedly connected to the outer wall of the filter tank 1. A centrifugal pump 8 is installed on the outer wall of the L-shaped plate 7. An inlet pipe 9 connected to the outlet of the centrifugal pump 8 is installed. An outlet pipe 10 located to the left of the filter screen plate 4 is connected to the lower side of the filter tank 1. A first electric valve 11 is provided on both the inlet pipe 9 and the outlet pipe 10. A second electric valve 5 is provided on both the feed pipe 2 and the discharge pipe 3.

[0026] A collection mechanism is provided at the opening on the lower side of the liquid outlet pipe 10 to collect the solids discharged from the liquid outlet pipe 10.

[0027] In this embodiment: During normal operation, the second electric valve 5 of the feed pipe 2 and the second electric valve 5 of the discharge pipe 3 are in the open state, while the first electric valve 11 of the liquid inlet pipe 9 and the first electric valve 11 of the liquid outlet pipe 10 are in the closed state. The suspension obtained after synthesizing the mesotrione intermediate is fed into the horizontally arranged filter tank 1 through the feed pipe 2. Under pressure, the liquid in the suspension passes through the filter screen 4 and is discharged through the discharge pipe 3, thereby achieving solid-liquid separation. The solid intermediate is trapped in the left side area of ​​the filter screen 4.

[0028] When solids need to be removed, the second electric valve 5 of the feed pipe 2 and discharge pipe 3 is closed, and the first electric valve 11 of the liquid inlet pipe 9 is opened, while the centrifugal pump 8 is started. The centrifugal pump 8 pumps the rinsing liquid into the filter tank 1 through the liquid inlet pipe 9. During this process, the pressure transmitter 21 monitors the pressure inside the filter tank 1 in real time. When the rinsing liquid fills the filter tank 1 and reaches the set pressure threshold, the pressure transmitter 21 sends a signal to the PLC controller 19, which then controls the opening of the first electric valve 11 of the liquid outlet pipe 10. At this time, the rinsing liquid will be discharged from the liquid outlet pipe 10 under pressure. As the rinsing liquid flows from right to left, it will reverse through the filter screen 4 on the clean side of the right side. The reverse water flow cleans the solids attached to the filter screen 4. The waste liquid formed by the solids being washed off and the rinsing liquid is continuously discharged through the liquid outlet pipe 10. During this process, the rinsing liquid will always fill the interior of the filter tank 1 due to the pressure. The waste liquid is then collected by the collection mechanism.

[0029] Through the above workflow, the solids trapped on the filter screen 4 can be automatically cleaned and collected, reducing labor intensity, improving production efficiency, and avoiding the tedious process of disassembling the filter screen 4. The operation is simple and convenient.

[0030] As a technical optimization of this utility model, the collection mechanism includes a connecting cover 12 fixedly connected to the outer wall of the liquid outlet pipe 10, a collection bucket 13 threadedly connected to the inner wall of the connecting cover 12, a intercepting mesh plate 15 installed inside the collection bucket 13, a sealing gasket 14 provided at the top of the inner wall of the connecting cover 12, the sealing gasket 14 abutting against the upper edge of the collection bucket 13, and a discharge port 16 connected to the lower side of the collection bucket 13.

[0031] In this embodiment: the waste liquid enters the inside of the collection tank 13 through the connecting cover 12. The intercepting mesh plate 15 installed inside the collection tank 13 can intercept the solid particles in the waste liquid for a second time, thereby collecting the solids. The filtered liquid is discharged through the discharge port 16 on the lower side of the collection tank 13. The sealing gasket 14 set at the top of the inner wall of the connecting cover 12 ensures the sealing of the connection and prevents leakage.

[0032] When it is necessary to clean up the solids trapped in the collection bucket 13, the operator can rotate the collection bucket 13 to separate it from the connecting cover 12, so as to conveniently pour out the accumulated solids.

[0033] As a technical optimization of this utility model, a sleeve 20 is fixedly connected to the upper end of the filter tank 1, and a pressure transmitter 21 is installed inside the sleeve 20. The detection end of the pressure transmitter 21 extends into the filter tank 1.

[0034] A vertical plate 17 is installed on the upper end of the L-shaped plate 7, and an operation panel 18 and a PLC controller 19 are installed on the outer wall of the vertical plate 17.

[0035] In this embodiment: the pressure transmitter 21 is installed on the top of the filter tank 1 through the sleeve 20, monitors the pressure in the filter tank 1 in real time and transmits the signal to the PLC controller 19, and controls the opening of the first electric valve 11 of the outlet pipe 10 through the PLC controller 19; parameters can be set and commands can be sent through the operation panel 18, and the PLC controller 19 receives the commands from the operation panel 18, and can then control the closing of the first electric valve 11, the opening and closing of the second electric valve 5 and the starting and stopping of the centrifugal pump 8.

[0036] As a technical optimization of this utility model, a flange 6 is provided at the end of the feed pipe 2 and the discharge pipe 3 away from the filter tank 1.

[0037] In this embodiment, both the feed pipe 2 and the discharge pipe 3 are provided with flanges 6 at the ends away from the filter tank 1, through which external pipes can be connected.

[0038] As a technical optimization of this utility model, the sealing gasket 14 is made of fluororubber.

[0039] In this embodiment: when the collection bucket 13 is connected to the connecting cover 12 by threads, the fluororubber sealing gasket 14 undergoes compression deformation at the joint surface to form a reliable seal. Its excellent solvent resistance and corrosion resistance can effectively prevent the leakage of waste liquid containing chemicals.

[0040] As a technical optimization of this utility model, the outer wall of the collection bucket 13 is equipped with multiple handles.

[0041] In this embodiment, multiple handles installed on the outer wall of the collection bucket 13 provide the operator with points of leverage to facilitate the rotation of the collection bucket 13.

[0042] The working principle and usage process of this utility model are as follows: During normal operation, the second electric valve 5 of the feed pipe 2 and the second electric valve 5 of the discharge pipe 3 are in the open state, while the first electric valve 11 of the liquid inlet pipe 9 and the first electric valve 11 of the liquid outlet pipe 10 are in the closed state. The feed pipe 2 is connected to an external pressure pipeline, and the suspension obtained after synthesizing the mesotrione intermediate is fed into the horizontally set filter tank 1 through the feed pipe 2. Under pressure, the liquid in the suspension passes through the filter screen plate 4 and is discharged through the discharge pipe 3, thereby achieving solid-liquid separation. The solid intermediate is trapped in the left side area of ​​the filter screen plate 4.

[0043] When solids need to be removed, a command is issued via the operation panel 18. Upon receiving the command, the PLC controller 19 closes the second electric valve 5 of the feed pipe 2 and the discharge pipe 3, and opens the first electric valve 11 of the liquid inlet pipe 9, while simultaneously starting the centrifugal pump 8. The centrifugal pump 8 pumps the rinsing liquid into the filter tank 1 through the liquid inlet pipe 9. During this process, the pressure transmitter 21 is energized and starts, monitoring the pressure inside the filter tank 1 in real time. When the rinsing liquid fills the filter tank 1 and reaches the set pressure threshold, the pressure transmitter 21 transmits a signal to the PLC controller 19, which then controls the opening of the first electric valve 11 of the liquid outlet pipe 10. At this time, the flushing liquid will be discharged from the outlet pipe 10 under pressure. As the flushing liquid flows from right to left, it will pass through the filter screen 4 in reverse on the clean side of the filter screen 4. The reverse water flow cleans the solids attached to the filter screen 4. The waste liquid formed by the solids that are washed off and the flushing liquid is continuously discharged through the outlet pipe 10. During this process, the flushing liquid will always fill the interior of the filter tank 1 due to the pressure.

[0044] The waste liquid then enters the collection tank 13 through the connecting cover 12. The intercepting mesh plate 15 installed inside the collection tank 13 can perform secondary interception of solid particles in the waste liquid, realizing the collection of solids. The filtered liquid is discharged through the discharge port 16 on the lower side of the collection tank 13. The sealing gasket 14 set at the top of the inner wall of the connecting cover 12 ensures the sealing of the connection and prevents leakage.

[0045] When it is necessary to clean up the solids trapped in the collection bucket 13, the operator can rotate the handle of the collection bucket 13 to separate it from the connecting cover 12, thereby conveniently emptying the accumulated solids.

[0046] Through the above workflow, the solids trapped on the filter screen 4 can be automatically cleaned and collected, reducing labor intensity, improving production efficiency, and avoiding the tedious process of disassembling the filter screen 4. The operation is simple and convenient.

[0047] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0048] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. An apparatus for synthesizing a mesotrione intermediate, comprising a horizontally arranged filter tank (1), characterized in that: The filter tank (1) is equipped with a filter screen plate (4) for separating solids and liquids. The left end of the filter tank (1) is connected to a feed pipe (2), and the lower side of the filter tank (1) is connected to a discharge pipe (3) located to the right of the filter screen plate (4). The filter tank (1) is provided with a rinsing mechanism for cleaning the separated solids. The rinsing mechanism includes an L-shaped plate (7) fixedly connected to the outer wall of the filter tank (1). A centrifugal pump (8) is installed on the outer wall of the L-shaped plate (7). An inlet pipe (9) connected to the filter tank (1) is installed at the outlet of the centrifugal pump (8). An outlet pipe (10) located to the left of the filter screen plate (4) is connected to the lower side of the filter tank (1). A first electric valve (11) is provided on both the inlet pipe (9) and the outlet pipe (10). A second electric valve (5) is provided on both the feed pipe (2) and the discharge pipe (3). A collection mechanism is provided at the opening on the lower side of the liquid outlet pipe (10) to collect the solid discharged from the liquid outlet pipe (10).

2. The apparatus for synthesizing a mesotrione intermediate according to claim 1, characterized in that: The collection mechanism includes a connecting cover (12) fixedly connected to the outer wall of the outlet pipe (10). The inner wall of the connecting cover (12) is threadedly connected to a collection bucket (13). A trapping mesh plate (15) is installed inside the collection bucket (13). A sealing gasket (14) is provided at the top of the inner wall of the connecting cover (12). The sealing gasket (14) abuts against the upper edge of the collection bucket (13). The lower side of the collection bucket (13) is connected to a discharge port (16).

3. The apparatus for synthesizing a mesotrione intermediate according to claim 1, characterized in that: The upper end of the filter tank (1) is fixedly connected to a sleeve (20), and a pressure transmitter (21) is installed inside the sleeve (20). The detection end of the pressure transmitter (21) extends into the filter tank (1). A vertical plate (17) is installed on the upper end of the L-shaped plate (7), and an operation panel (18) and a PLC controller (19) are installed on the outer wall of the vertical plate (17).

4. The apparatus for synthesizing a mesotrione intermediate according to claim 1, characterized in that: Both the feed pipe (2) and the discharge pipe (3) are provided with flanges (6) at the ends away from the filter tank (1).

5. An apparatus for synthesizing a mesotrione intermediate according to claim 2, characterized in that: The sealing gasket (14) is made of fluororubber.

6. An apparatus for synthesizing a mesotrione intermediate according to claim 2, characterized in that: The outer wall of the collection bucket (13) is equipped with multiple handles.

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