PVC suspension polymerization initiator feeding device

Abstract

The utility model discloses a PVC (polyvinyl chloride) suspension polymerization initiator feeding device which comprises a rack, an agent storage tank mounted on one side in the rack through a bracket, a tank opening formed in the outer wall of one side of the agent storage tank, an agent injection hopper arranged at the top end of the tank opening, a coarse filter screen mounted at the upper end in the agent injection hopper, and an agent storage barrel arranged at the bottom end of the agent storage tank, the outer wall of one side of the lower end of the agent storage barrel is provided with an agent outlet, the bottom of the rack is provided with a precise metering pump through a support, one end of the precise metering pump is provided with an agent discharge port, the other end of the precise metering pump is provided with a second agent conveying hose, and the end, away from the precise metering pump, of the second agent conveying hose is provided with an agent passing box. A motor is installed on the inner side of the bearing frame, and the bottom end of the motor extends into the agent storage tank and is provided with a stirring paddle. According to the initiator feeding device, the initiator feeding effect is guaranteed when the initiator feeding device is used, the quality of initiators in the agent storage tank and the agent storage barrel is guaranteed, and the purity of the initiators is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of PVC suspension polymerization production, in particular to a device for adding an initiator in PVC suspension polymerization. Background Technique

[0002] The peroxide initiator used in PVC suspension polymerization is the main initiator for PVC production. According to its molecular structure, it can be divided into two categories: diperoxycarbonates and peroxy esters. At present, in China's PVC production, the only diperoxycarbonate initiator in use is EHP. With the advent of the highly efficient initiator cumyl peroxyneodecanoate (CNP), the application research of composite initiators has developed rapidly. In PVC suspension polymerization production, the addition of initiators is one of the key factors affecting the polymerization reaction efficiency and product quality. In order to ensure the addition effect, a corresponding initiator addition device needs to be used.

[0003] An initiator addition device with the reference publication number of CN207872115U includes a reaction kettle, an initiator storage tank, a feeding assembly, a cleaning assembly, and a dryer. The reaction kettle is provided with a feed inlet and a discharge outlet. A motor is provided at the bottom end of the reaction kettle, and the motor is connected to a stirring shaft. The stirring shaft passes through the bottom end of the reaction kettle and is threadedly connected to the feeding assembly. The cleaning assembly is arranged above the second through pipe and includes an annular base fixed on the side wall of the reaction kettle. A water delivery pipeline is arranged in the base, a spray head communicating with the water delivery pipeline is arranged below the base, and a water inlet pipeline communicating to the outside of the reaction kettle is also arranged on the base. The dryer is communicated to the top end of the reaction kettle through a third pipeline. This device can evenly sprinkle the initiator into the reaction kettle, enabling the initiator and the material to fully react. Moreover, the reaction kettle is easy to clean and dry, improving production efficiency and stabilizing product quality. According to the above, although this addition device can be well applied, it is usually not convenient for accurately metering the addition of the initiator, making it difficult for the addition accuracy of this addition device to reach the established expectation and still needs to be improved. Summary of the Invention

[0004] The purpose of the utility model is to provide a device for adding an initiator in PVC suspension polymerization, so as to solve the problem proposed in the above background technique that although the addition device can be well applied, it is usually not convenient for accurately metering the addition of the initiator, making it difficult for the addition accuracy of this addition device to reach the established expectation.

[0005] To achieve the above object, the utility model provides the following technical solution: A device for adding PVC suspension polymerization initiator, including a frame. On one side inside the frame, a storage tank is installed through a bracket. On the outer wall of one side of the storage tank, there is a tank opening. At the top of the tank opening, there is a dosing hopper. At the upper end inside the dosing hopper, a coarse filter screen is installed. At the bottom of the storage tank, there is a storage cylinder. On the outer wall of one side at the lower end of the storage cylinder, there is a dosing port. At the bottom of the frame, a precision metering pump is installed through a bracket. At one end of the precision metering pump, there is a dosing port. At the other end of the precision metering pump, there is a second dosing hose. At the end of the second dosing hose away from the precision metering pump, there is a dosing box. At the top of the storage tank, there is a bearing frame. Inside the bearing frame, a motor is installed. The bottom end of the motor extends into the storage tank and is provided with a stirring paddle. The bottom end of the stirring paddle extends into the storage cylinder and is provided with a propeller. On the outer wall of one side of the frame, a control box is installed. The output end of the single-chip microcomputer inside the control box is electrically connected to the input ends of the motor and the precision metering pump respectively.

[0006] Preferably, on one side at the bottom of the dosing box, there is a dosing pipeline. At the end of the dosing pipeline away from the dosing box, there is a lower threaded pipe joint. Through the setting of the dosing pipeline, it is convenient to convey and add the initiator.

[0007] Preferably, at the end of the lower threaded pipe joint away from the dosing pipeline, a filter cylinder is installed. At the end of the filter cylinder away from the lower threaded pipe joint, an upper threaded pipe joint is installed. Through the setting of the filter cylinder, it is convenient to filter out the particulate matter existing in the initiator.

[0008] Preferably, at the end of the upper threaded pipe joint away from the filter cylinder, there is a first dosing hose. At the end of the first dosing hose away from the upper threaded pipe joint, it is connected to one end of the dosing port. Through the setting of the first dosing hose, it is convenient for the initiator inside the storage cylinder to flow into the dosing pipeline.

[0009] Preferably, on the outer wall of one side of the dosing box, there is a component placement rack. At the end of the component placement rack away from the dosing box, it is fixedly connected to the inner wall of the frame. Through the setting of the component placement rack, it is convenient to place and process the dosing box.

[0010] Preferably, on the top of the dosing box, a pressure gauge is installed. The output end of the pressure gauge is electrically connected to the input end of the single-chip microcomputer inside the control box. On the outer wall of one side of the dosing pipeline, a flowmeter is installed. The output end of the flowmeter is electrically connected to the input end of the single-chip microcomputer inside the control box. Through the setting of the flowmeter, the flow rate of the initiator can be monitored in real time.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the device for feeding the PVC suspension polymerization initiator not only ensures the feeding effect of the initiator when the feeding device is used, but also ensures the quality of the initiator in the storage tank and the storage cylinder, and improves the purity of the initiator;

[0012] The precise metering pump is set up to accurately control the amount of initiator added. A flow meter is installed on the outer wall of the delivery pipeline to monitor the flow of the initiator in real time to ensure the accuracy of the amount of addition. The initiator can be accurately metered, thereby ensuring the effect of adding the initiator when the feeding device is used.

[0013] By driving the stirring paddle and propeller to rotate through the motor, the initiator in the storage tank and the storage cylinder can be stirred and mixed to enhance the activity of the molecules inside the initiator and reduce the precipitation of the initiator, thereby ensuring the quality of the initiator in the storage tank and the storage cylinder;

[0014] By arranging a coarse filter screen inside the injection bucket and installing a filter cartridge between the upper threaded pipe joint and the lower threaded pipe joint, when the initiator is injected into the injection bucket, the coarse filter screen can preliminarily filter the large particles in the initiator, and when the initiator is processed and transported, the filter cartridge can further filter the particles in the initiator, thereby improving the purity of the initiator. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the storage tank of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the stirring paddle of the utility model;

[0018] Figure 4 It is a schematic diagram of the enlarged structure of the drug delivery pipeline of the utility model from the side.

[0019] In the figure: 1. frame; 2. control box; 3. agent storage tank; 4. injection hopper; 5. coarse filter; 6. support frame; 7. motor; 8. agent storage cylinder; 9. precision metering pump; 10. agent discharge port; 11. agent outlet; 12. first agent delivery hose; 13. second agent delivery hose; 14. tank mouth; 15. stirring paddle; 16. propeller; 17. upper threaded pipe joint; 18. filter cartridge; 19. lower threaded pipe joint; 20. agent delivery pipeline; 21. agent box; 22. flow meter; 23. pressure gauge; 24. mounting rack. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0021] Please refer to Figures 1-4 , an embodiment provided by the present utility model: a device for adding a PVC suspension polymerization initiator, including a frame 1. One side inside the frame 1 is provided with a storage tank 3 through a bracket. An outer wall of one side of the storage tank 3 is provided with a tank opening 14. A dosing hopper 4 is provided at the top of the tank opening 14. A coarse filter screen 5 is installed at the upper end inside the dosing hopper 4. A storage cylinder 8 is provided at the bottom of the storage tank 3. An agent outlet 11 is provided on an outer wall of one side at the lower end of the storage cylinder 8. A precision metering pump 9 is installed at the bottom of the frame 1 through a bracket. One end of the precision metering pump 9 is provided with a discharge port 10. The other end of the precision metering pump 9 is provided with a second agent delivery hose 13. One end of the second agent delivery hose 13 away from the precision metering pump 9 is provided with a dosing box 21. One side at the bottom end of the dosing box 21 is provided with an agent delivery pipeline 20. One end of the agent delivery pipeline 20 away from the dosing box 21 is provided with a lower threaded pipe joint 19;

[0022] During use, through the setting of the agent delivery pipeline 20, it is convenient to convey and add the initiator;

[0023] One end of the lower threaded pipe joint 19 away from the agent delivery pipeline 20 is installed with a filter cylinder 18. One end of the filter cylinder 18 away from the lower threaded pipe joint 19 is installed with an upper threaded pipe joint 17;

[0024] During use, through the setting of the filter cylinder 18, it is convenient to filter out the particulate matter existing in the initiator;

[0025] One end of the upper threaded pipe joint 17 away from the filter cylinder 18 is provided with a first agent delivery hose 12. One end of the first agent delivery hose 12 away from the upper threaded pipe joint 17 is connected to one end of the agent outlet 11;

[0026] During use, through the setting of the first agent delivery hose 12, it is convenient for the initiator inside the storage cylinder 8 to flow into the agent delivery pipeline 20;

[0027] A pressure gauge 23 is installed at the top end of the dosing box 21. An output end of the pressure gauge 23 is electrically connected to an input end of a single-chip microcomputer inside the control box 2. A flow meter 22 is installed on an outer wall of one side of the agent delivery pipeline 20. An output end of the flow meter 22 is electrically connected to an input end of the single-chip microcomputer inside the control box 2;

[0028] During use, through the setting of the flow meter 22, it is convenient to monitor the flow rate of the initiator in real time;

[0029] On the outer wall of one side of the general agent box 21, there is a component placing rack 24, and one end of the component placing rack 24 far away from the general agent box 21 is fixedly connected to the inner wall of the machine frame 1;

[0030] During use, through the setting of the component placing rack 24, the general agent box 21 can be placed and processed;

[0031] At the top of the agent storage tank 3, there is a bearing rack 6. Inside the bearing rack 6, there is a motor 7 installed. The bottom end of the motor 7 extends into the agent storage tank 3 and is provided with a stirring paddle 15. The bottom end of the stirring paddle 15 extends into the agent storage cylinder 8 and is provided with a propeller 16. On the outer wall of one side of the machine frame 1, there is a control box 2 installed. The output ends of the single-chip microcomputer inside the control box 2 are respectively electrically connected to the input ends of the motor 7 and the precision metering pump 9.

[0032] When the embodiment of the present application is in use, first, through the settings of the coarse filter screen 5 and the filter cylinder 18, when the initiator is injected into the injection hopper 4, the large particle substances in the initiator can be initially filtered by the coarse filter screen 5. When the initiator is processed and transported, the filter cylinder 18 can further filter the particulate matters in the initiator to improve the purity of the initiator. Then, through the setting of the precision metering pump 9, it is used to accurately control the feeding amount of the initiator. Since a flow meter 22 is installed on the outer wall of the agent conveying pipeline 20, it is used to monitor the flow rate of the initiator in real time to ensure the accuracy of the feeding amount. After that, the initiator is stored in the agent storage tank 3 and the agent storage cylinder 8, and a hose is used to connect the external reaction vessel and the agent discharging port 10. When the precision metering pump 9 is started, the initiator inside the agent storage cylinder 8 will be transported and fed to the reaction vessel through relevant components such as the first agent conveying hose 12, the agent conveying pipeline 20, and the second agent conveying hose 13 to achieve the purpose of feeding the initiator. Finally, the motor 7 drives the stirring paddle 15 and the propeller 16 to rotate, and the initiator inside the agent storage tank 3 and the agent storage cylinder 8 can be stirred and mixed to improve the activity of the internal molecules of the initiator and reduce the phenomenon of the initiator generating precipitation, thus completing the use of the initiator feeding device.

Claims

1. A device for adding initiator to PVC suspension polymerization, characterized in that: The invention comprises a frame (1), a storage tank (3) is mounted on one side of the frame (1) via a bracket, a tank opening (14) is arranged on the outer wall of one side of the storage tank (3), a injection hopper (4) is arranged at the top of the tank opening (14), a coarse filter (5) is mounted on the upper end of the injection hopper (4), a storage cylinder (8) is arranged at the bottom end of the storage tank (3), a discharge port (11) is arranged on the outer wall of one side of the lower end of the storage cylinder (8), a precision metering pump (9) is mounted on the bottom of the frame (1) via a bracket, a discharge port (10) is arranged at one end of the precision metering pump (9), and a second delivery soft tube (11) is arranged at the other end of the precision metering pump (9). The invention relates to a device for preparing a drug delivery agent in a pharmaceutical preparation process. The device comprises a first inlet pipe (13), a second inlet hose (13) having an end away from the precision metering pump (9) and a drug delivery box (21). The top of the drug storage tank (3) is provided with a support frame (6). The inner side of the support frame (6) is provided with a motor (7). The bottom end of the motor (7) extends to the inside of the drug storage tank (3) and is provided with a stirring paddle (15). The bottom end of the stirring paddle (15) extends to the inside of the drug storage cylinder (8) and is provided with a propeller (16). A control box (2) is installed on the outer wall of one side of the frame (1). The output end of the single chip microcomputer in the control box (2) is electrically connected to the input end of the motor (7) and the precision metering pump (9) respectively.

2. The device for adding a PVC suspension polymerization initiator according to claim 1, characterized in that: A drug delivery pipeline (20) is provided on one side of the bottom end of the drug delivery box (21), and a lower threaded pipe joint (19) is provided on one end of the drug delivery pipeline (20) away from the drug delivery box (21).

3. The device for adding a PVC suspension polymerization initiator according to claim 2, characterized in that: A filter cartridge (18) is installed at one end of the lower threaded pipe joint (19) away from the agent delivery pipeline (20), and an upper threaded pipe joint (17) is installed at one end of the filter cartridge (18) away from the lower threaded pipe joint (19).

4. The device for adding initiator to PVC suspension polymerization according to claim 3, characterized in that: A first drug delivery hose (12) is provided at one end of the upper threaded pipe joint (17) away from the filter cartridge (18), and one end of the first drug delivery hose (12) away from the upper threaded pipe joint (17) is connected to one end of the drug outlet (11).

5. The device for adding initiator to PVC suspension polymerization according to claim 1, characterized in that: A component mounting frame (24) is provided on an outer wall of one side of the drug box (21), and one end of the component mounting frame (24) away from the drug box (21) is fixedly connected to the inner wall of the frame (1).

6. The device for adding initiator to PVC suspension polymerization according to claim 2, characterized in that: A pressure meter (23) is installed at the top of the medication box (21), and the output end of the pressure meter (23) is electrically connected to the input end of the single chip microcomputer inside the control box (2). A flow meter (22) is installed on the outer wall of one side of the medication delivery pipeline (20), and the output end of the flow meter (22) is electrically connected to the input end of the single chip microcomputer inside the control box (2).

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