Regulating purifying device for butyl methacrylate

Abstract

The utility model relates to the technical field of chemical synthesis, specifically related to the adjusting and refining device for butyl methacrylate, including the refining tower that supplies the refining of crude ester liquid, the top intercommunication of refining tower has the supply bin, the top intercommunication of supply bin has the hopper, be equipped with the weighing structure for weighing the polymerization inhibitor and the polymerization inhibitor enters the weighing structure in the hopper, be equipped with the vibration structure that can disperse the polymerization inhibitor in the supply bin. The utility model can quantitatively add the polymerization inhibitor to the refining tower, and avoid the polymerization inhibitor and the crude ester liquid contact and occur the group when.

Description

Technical Field

[0001] This utility model relates to the technical field of chemical synthesis, specifically to a conditioning and refining apparatus for butyl methacrylate. Background Technology

[0002] Butyl methacrylate (BMA) is an important acrylate monomer. It is a colorless, transparent liquid with a characteristic odor at room temperature and pressure. Primarily used as a polymerization monomer, its core value lies in its ability to significantly improve the flexibility, low-temperature flexibility, and impact resistance of polymer materials through copolymerization, making it an indispensable raw material in coatings, adhesives, inks, textile auxiliaries, and plastic modification.

[0003] In the industrial production of butyl methacrylate, the crude ester liquid needs to be introduced into a refining tower for refining. Under a high vacuum, butyl methacrylate vapor that meets the purity requirements is distilled out. The distilled butyl methacrylate vapor is then condensed to obtain the product.

[0004] During the refining of crude ester liquid in the refining tower, a polymerization inhibitor must be added to prevent free radical polymerization. Insufficient inhibitor dosage results in poor inhibition, while excessive inhibitor leaves residues in the crude ester liquid, affecting the quality of the final product. Therefore, a precise amount of inhibitor is needed to achieve optimal inhibition. Secondly, when adding the inhibitor precisely, direct pouring from the feed inlet into the refining tower can easily cause agglomeration upon contact with the crude ester liquid. Since agglomerated inhibitor dissolves slowly, this slows down the inhibitor's ability to inhibit polymerization. Utility Model Content

[0005] The present invention aims to provide a conditioning and refining apparatus for butyl methacrylate, which can quantitatively add a polymerization inhibitor into the refining tower and avoid agglomeration of the polymerization inhibitor when it comes into contact with the crude ester liquid.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: 1) A refining apparatus for butyl methacrylate, comprising a refining tower for refining crude ester liquid, characterized in that a feed silo is connected to the top of the refining tower, a hopper is connected to the top of the feed silo, a weighing structure for weighing a polymerization inhibitor and supplying the polymerization inhibitor into the refining tower is provided in the hopper, and a vibration structure for dispersing the polymerization inhibitor is provided in the feed silo.

[0007] In this invention, during the process of adding the polymerization inhibitor into the hopper, a weighing structure weighs the polymerization inhibitor added into the hopper, and then the weighed polymerization inhibitor is fed into the refining tower through the weighing structure, thereby achieving the effect of quantitatively adding the polymerization inhibitor into the refining tower. At the same time, during the process of the polymerization inhibitor entering the refining tower, the polymerization inhibitor is dispersed when it passes through the vibration structure. When the dispersed polymerization inhibitor comes into contact with the crude ester liquid, it is not easy to agglomerate, and the dissolution rate is fast, which improves the speed at which the polymerization inhibitor takes effect.

[0008] 2) The conditioning and refining apparatus for butyl methacrylate as described in 1), wherein: The weighing structure includes two weighing plates, which are symmetrically hinged to the two inner side walls of the hopper. A telescopic pump is provided below each of the two weighing plates. The piston rod of the telescopic pump is hinged to the weighing plate, and the bottom of the telescopic pump is hinged to the inner side wall of the hopper. A pressure sensor capable of detecting the weight of the polymerization inhibitor is provided on the weighing plate. The structure also includes a microprocessor, which is electrically connected to the telescopic pump and the pressure sensor.

[0009] In this invention, a microprocessor is first used to set a preset value for the weight of the polymerization inhibitor required for the weighing. Then, the polymerization inhibitor is added into the hopper, and the polymerization inhibitor in the hopper falls onto the weighing plate. Since a pressure sensor is installed on the weighing plate, the pressure sensor can detect the weight of the polymerization inhibitor on the weighing plate and send the detected weight value to the microprocessor.

[0010] After receiving the weight value from the pressure sensor, the microprocessor compares it with a preset value. If the weight value does not reach the preset value, it continues to add polymerization inhibitor to the hopper, increasing the weight of the inhibitor on the weighing plate until the weight value reaches the preset value. At this point, it stops adding polymerization inhibitor to the hopper, and the microprocessor sends a command to the telescopic pump to retract the piston rod. During the retraction of the piston rod, the piston rod drives the weighing plate to flip downwards and open, allowing the polymerization inhibitor on the weighing plate to fall into the feeding hopper and then into the refining tower connected to the feeding hopper. This achieves the effect of quantitatively adding polymerization inhibitor to the refining tower. When the weight value reaches zero, the microprocessor sends a command to the telescopic pump to extend the piston rod. During the extension of the piston rod, the piston rod drives the weighing plate to flip and reset, waiting for the next weighing.

[0011] 3) The conditioning and refining apparatus for butyl methacrylate as described in 1), wherein: The vibrating structure includes a mesh plate for dispersing the polymerization inhibitor, the mesh plate being detachably installed inside the feeding hopper, and a vibrator for vibrating the mesh plate being installed on the side of the mesh plate located outside the feeding hopper.

[0012] In this invention, the polymerization inhibitor entering the feeding hopper falls onto the mesh plate. The mesh plate is vibrated by a vibrator, causing the polymerization inhibitor to pass through the mesh plate and be dispersed into the refining tower. When the dispersed polymerization inhibitor comes into contact with the crude ester liquid, it is not easy to clump together and the dissolution speed is fast, which improves the speed at which the polymerization inhibitor takes effect.

[0013] 4) The conditioning and refining apparatus for butyl methacrylate as described in 3), wherein: The side of the feeding bin is provided with a pull-out opening for the feeding mesh plate to extend into the feeding bin, and the inner side wall of the feeding bin is provided with a fixing groove for inserting the feeding mesh plate at the position corresponding to the pull-out opening.

[0014] In this invention, the mesh plate can be inserted into the feeding hopper through the pull-out opening during installation, and then inserted into the fixing groove, thus realizing the detachable installation of the mesh plate, which facilitates cleaning or replacement of the mesh plate.

[0015] 5) The conditioning and refining apparatus for butyl methacrylate as described in 3), wherein: The screen plate includes a frame, a screen is fixed inside the frame, and a soft rubber strip is provided on the frame for sealing the pull-out opening. One side of the frame is inserted into the fixing groove, and the other side of the frame is connected to the vibrator. The side of the frame is provided with two handles on the same side as the vibrator, and the two handles are symmetrically arranged.

[0016] In this invention, during the process of vibrating the vibrator plate frame and screen, the polymerization inhibitor passes through the screen and is dispersed into the refining tower. When the dispersed polymerization inhibitor comes into contact with the crude ester liquid, it is not easy to agglomerate and the dissolution speed is fast, which improves the speed at which the polymerization inhibitor plays its role in inhibiting polymerization.

[0017] During the installation of the plate frame, the operator can hold two handles and insert the plate frame into the feeding hopper through the pull-out port until it is inserted into the fixing slot. At the same time, the soft rubber strip blocks the pull-out port to prevent the polymerization inhibitor from leaking out of the feeding hopper. During the disassembly of the plate frame, the operator can simply hold the two handles and apply force to pull the plate frame out of the pull-out port to complete the disassembly. This installation and disassembly method is simple and easy to operate.

[0018] Compared with the prior art, this utility model also has the following technical effects: In this invention, a microprocessor is first used to set a preset value for the amount of polymerization inhibitor required for the weighing. Then, the polymerization inhibitor is added to the hopper and falls onto the weighing plate. The pressure sensor on the weighing plate sends the detected weight value to the microprocessor. The microprocessor compares the weight value with the preset value and controls the extension and retraction of the piston rod of the telescopic pump. This enables the quantitative addition of polymerization inhibitor into the refining tower. Furthermore, as the polymerization inhibitor enters the refining tower through the feeding hopper, it falls onto the screen. During the vibration of the screen by the vibrator, the polymerization inhibitor passes through the screen and is dispersed into the refining tower. The dispersed polymerization inhibitor is less prone to clumping when it comes into contact with the crude ester liquid, resulting in a faster dissolution rate and increasing the speed at which the polymerization inhibitor exerts its inhibitory effect.

[0019] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the adjusting and refining device for butyl methacrylate of this invention, in state one. Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is a schematic diagram of the structure of the adjusting and refining device for butyl methacrylate of this invention in state two; Figure 4 for Figure 1 A magnified view of a section at point B in the middle; Figure 5 This is a schematic diagram of the mesh plate in the adjusting and refining device for butyl methacrylate according to this invention.

[0021] The reference numerals in the accompanying drawings include: 1. Refining tower; 2. Feed hopper; 3. Weighing plate; 4. Telescopic pump; 5. Pressure sensor; 6. Plate frame; 7. Screen; 8. Soft rubber head; 9. Vibrator; 10. Handle; 11. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] In the above description of this utility model, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. 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. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0027] See the example. Figure 1 and Figure 3 As shown, this embodiment is an adjustment and refining device for butyl methacrylate, including a refining tower 1 for refining crude ester liquid. A feed hopper 2, which is connected to the top of the refining tower 1, is installed on the top of the refining tower 1 by bolts and nuts. The feed hopper 2 is rectangular in shape. A hopper 3, which is connected to the top of the feed hopper 2, is welded and fixed. Two weighing plates 4 are symmetrically hinged to the two inner walls of the hopper 3. A telescopic pump 5 is hinged to the two inner walls of the hopper 3 below the two weighing plates 4. The piston rod of the telescopic pump 5 is hinged to the lower surface of the weighing plate 4. A pressure sensor 6, which can detect the weight of the polymerization inhibitor, is installed on the weighing plate 4. The device also includes a microprocessor, which is electrically connected to the telescopic pump 5 and the pressure sensor 6. After setting the preset value of the polymerization inhibitor weight required for this weighing using the microprocessor, the polymerization inhibitor is added to the hopper 3. The polymerization inhibitor added to the hopper 3 falls onto the weighing plate 4. The pressure sensor 6 can detect the weight of the polymerization inhibitor on the weighing plate 4 and send the detected weight value to the microprocessor.

[0028] After receiving the weight value from pressure sensor 6, the microprocessor compares the weight value with a preset value. If the weight value does not reach the preset value, it continues to add polymerization inhibitor to hopper 3, increasing the weight of the polymerization inhibitor on weighing plate 4. (See [link to relevant documentation]). Figure 4 As shown, when the weight value reaches the preset value, the addition of polymerization inhibitor to hopper 3 stops. The microprocessor sends a command to the telescopic pump 5 to control the telescopic pump 5 to retract the piston rod. During the retraction of the piston rod, the piston rod drives the weighing plate 4 to flip downwards and open. The polymerization inhibitor on the weighing plate 4 falls into the feeding hopper 2, and then into the refining tower 1 connected to the feeding hopper 2, thus achieving the effect of quantitatively adding polymerization inhibitor into the refining tower 1; see also Figure 2 As shown, when the weight value reaches zero, the microprocessor sends a command to the telescopic pump 5 to control the telescopic pump 5 to extend the piston rod. During the extension of the piston rod, the piston rod drives the weighing plate 4 to flip and reset, waiting for the next weighing.

[0029] See Figure 4 , Figure 5 As shown, a screen plate is detachably installed inside the feeding hopper 2. The specific structure of the screen plate is as follows: it includes a frame 7, a screen 8 fixed inside the frame 7, and a soft rubber strip for sealing the pull-out opening is pasted on the frame 7. A vibrator 10 for vibrating the frame 7 is installed on the side of the frame 7 outside the feeding hopper 2 by bolts and nuts. When the polymerization inhibitor on the weighing plate 4 falls into the feeding hopper 2, the polymerization inhibitor falls onto the screen 8. The vibrator 10 vibrates the frame 7, and the frame 7 drives the screen 8 to vibrate. The polymerization inhibitor passes through the screen 8 and is dispersed into the refining tower 1. When the dispersed polymerization inhibitor comes into contact with the crude ester liquid, it is not easy to agglomerate and the dissolution speed is fast, which improves the speed at which the polymerization inhibitor plays its role in inhibiting polymerization.

[0030] In this embodiment, the detachable installation method of the mesh plate is as follows: Two handles 11, on the same side as the vibrator 10, are installed on the side of the plate frame 7 via bolts and nuts. The two handles 11 are symmetrically arranged. A pull-out port for the plate frame 7 to extend into the feed hopper 2 is opened on the side of the feed hopper 2. A fixing groove for the plate frame 7 to be inserted is opened on the inner wall of the feed hopper 2 at the position corresponding to the pull-out port. During the installation of the mesh plate, the operator holds the two handles 11 and extends the plate frame 7 through the pull-out port into the feed hopper 2 until it is inserted into the fixing groove. At the same time, a soft rubber strip blocks the pull-out port to prevent the polymerization inhibitor from leaking out of the feed hopper 2. During the disassembly of the mesh plate, the operator holds the two handles 11 and applies force to pull the plate frame 7 out of the pull-out port, completing the disassembly. This installation and disassembly method is simple and easy to operate.

[0031] The above are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A conditioning and refining apparatus for butyl methacrylate, comprising a refining tower for refining crude ester solution, characterized in that, The top of the refining tower is connected to a feeding silo, and the top of the feeding silo is connected to a hopper. The hopper is equipped with a weighing structure for weighing the polymerization inhibitor and supplying it into the refining tower. The feeding silo is equipped with a vibrating structure that can disperse the polymerization inhibitor. The weighing structure includes two weighing plates, which are symmetrically hinged to the two inner sidewalls of the hopper. A telescopic pump is provided below each of the two weighing plates. The piston rod of the telescopic pump is hinged to the weighing plate, and the bottom of the telescopic pump is hinged to the inner sidewall of the hopper. The weighing plate is equipped with a pressure sensor that can detect the weight of the polymerization inhibitor. The system also includes a microprocessor, which is electrically connected to the telescopic pump and the pressure sensor.

2. The conditioning and refining apparatus for butyl methacrylate according to claim 1, characterized in that: The vibrating structure includes a mesh plate for dispersing the polymerization inhibitor, the mesh plate being detachably installed inside the feeding hopper, and a vibrator for vibrating the mesh plate being installed on the side of the mesh plate located outside the feeding hopper.

3. The conditioning and refining apparatus for butyl methacrylate according to claim 2, characterized in that: The side of the feeding bin is provided with a pull-out opening for the feeding mesh plate to extend into the feeding bin, and the inner side wall of the feeding bin is provided with a fixing groove for inserting the feeding mesh plate at the position corresponding to the pull-out opening.

4. The conditioning and refining apparatus for butyl methacrylate according to claim 3, characterized in that: The screen plate includes a frame, a screen is fixed inside the frame, and a soft rubber strip is provided on the frame for sealing the pull-out opening. One side of the frame is inserted into the fixing groove, and the other side of the frame is connected to the vibrator. The side of the frame is provided with two handles on the same side as the vibrator, and the two handles are symmetrically arranged.

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