Magnesium hydroxide modification device

Abstract

The utility model provides a magnesium hydroxide modification device, which relates to the technical field of magnesium hydroxide modification and comprises a modification cylinder, a feed hopper and a discharge port are arranged on the modification cylinder, an electromagnetic valve is arranged on the discharge port, and a temperature sensor is fixedly arranged in the modification cylinder. The device further comprises a weighing device, an automatic powder conveying assembly, a conveying pipe, a gear transmission assembly, a disc, an atomizing nozzle, a rotary joint, a metering pump, a stirring assembly and a heating assembly. According to the device, in the process of heating and modifying magnesium hydroxide, a liquid silane coupling agent is not directly poured into the modification cylinder, but is fully contacted with the surface of the magnesium hydroxide in a spraying manner, so that the modification effect of the magnesium hydroxide is better; meanwhile, the magnesium hydroxide and the silane coupling agent are automatically fed and can be quantitatively added, so that the ratio of the magnesium hydroxide to the silane coupling agent is accurate, and the modification process of the magnesium hydroxide is optimized.

Description

Technical Field

[0001] This utility model relates to the field of magnesium hydroxide modification technology, and more specifically, to a magnesium hydroxide modification device. Background Technology

[0002] Magnesium hydroxide is an inorganic compound with the chemical formula Mg(OH)2. It is a white amorphous powder or colorless hexagonal prismatic crystals, which are sparingly soluble in water and alcohol, but readily soluble in dilute acids and ammonium salt solutions. Its aqueous solution is weakly alkaline.

[0003] Magnesium hydroxide is widely used in polymer materials and rubber products. Currently, it needs to be modified before adding magnesium hydroxide to prepare polymers or rubber products. The commonly used modifier is silane coupling agent, which can modify magnesium hydroxide through chemical coating modification.

[0004] Currently, the general process involves directly adding liquid silane coupling agent into magnesium hydroxide powder and then heating and stirring to carry out the modification process. However, this method can easily lead to uneven contact between the silane coupling agent and magnesium hydroxide powder. In addition, manual addition is labor-intensive and it is difficult to control the ratio of the two. Therefore, the modification process of magnesium hydroxide needs to be optimized. Utility Model Content

[0005] The purpose of this invention is to solve the problems mentioned in the background art and to propose a magnesium hydroxide modification device.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A magnesium hydroxide modification device includes a modification cylinder, a feed hopper and a discharge port on the modification cylinder, a solenoid valve on the discharge port and a temperature sensor fixed inside the modification cylinder, and also includes a weighing device, an automatic powder conveying assembly, a conveying pipe, a gear transmission assembly, a disc, an atomizing nozzle, a rotary joint, a metering pump, a stirring assembly and a heating assembly.

[0008] The weighing equipment is equipped with a modified cylinder;

[0009] The automatic powder conveying assembly is connected to the feed hopper;

[0010] The conveying pipe is rotatably connected to the modified cylinder, and one end of the conveying pipe extends to the outside of the modified cylinder and is connected to the gear transmission assembly fixed on the modified cylinder.

[0011] The hollow disc is connected to one end of the delivery pipe and has several atomizing nozzles arranged around its circumference.

[0012] The output end of the rotary joint is connected to the other end of the delivery pipe, and the input end of the rotary joint is connected to a metering pump fixed on the modified cylinder and higher than the delivery pipe. The metering pump is connected to the silane coupling agent tank.

[0013] The stirring assembly is connected to the disc and is spaced apart from the atomizing nozzles;

[0014] The heating element is installed on the outer wall of the modified cylinder and is electrically connected to the temperature sensor.

[0015] Furthermore, the automatic powder conveying assembly includes a sealing plate and a powder conveying pump. The sealing plate is fixed on the feed hopper and is connected to the output pipeline of the powder conveying pump. The input pipeline of the powder conveying pump is connected to the magnesium hydroxide tank.

[0016] The above solution enables the automatic quantitative addition of magnesium hydroxide powder into the modification cylinder via an automatic powder conveying component.

[0017] Furthermore, the stirring assembly includes a connecting rod and stirring rollers. One end of the connecting rod is welded to the center of the disc, and several sets of stirring rollers are fixedly arranged circumferentially along the height direction of the connecting rod.

[0018] Furthermore, the other end of the connecting rod is fixed with symmetrically and inclined auxiliary stirring rollers.

[0019] In the above scheme, the rotation of the stirring component allows the modifier and magnesium hydroxide powder to be fully mixed and contacted. At the same time, by adding an auxiliary stirring roller, the mixing area can be further expanded to improve the modification effect of magnesium hydroxide powder.

[0020] Furthermore, the heating assembly includes a jacket, a steam generator, an inlet pipe, an exhaust pipe, and an exhaust valve. The jacket is fixed to the outer wall of the modified cylinder and is connected to the inlet pipe and the exhaust pipe. The inlet pipe is connected to the steam generator through a hose, and the exhaust pipe is equipped with an exhaust valve.

[0021] The above solution uses a heating component and a temperature sensor to control the temperature inside the modification cylinder within a pre-set range, thus enabling a stable and efficient modification process.

[0022] Furthermore, the discharge port is connected to a flow pipe, which is connected to a second powder conveying pump fixed on one side of the weighing equipment. The second powder conveying pump is connected to the top of the storage tank, and a double stirring assembly is installed inside the storage tank. A second solenoid valve is installed on the discharge port of the storage tank.

[0023] The above scheme uses a second powder conveying pump and the opening of the discharge port solenoid valve to transfer the modified magnesium hydroxide to the storage tank under negative pressure. Then, the modified powder is dispersed by a double stirring assembly. In addition, the residual heat and self-friction of the powder can be used for further modification. At this time, a new round of magnesium hydroxide modification process can begin in the modification cylinder.

[0024] Furthermore, the discharge port of the storage hopper is connected to the feed hopper of the water-cooled screw conveyor, and the discharge channel of the water-cooled screw conveyor is connected to the collection container.

[0025] The above method can effectively cool the magnesium hydroxide powder after secondary modification using a water-cooled screw conveyor, and then collect it after cooling.

[0026] Compared with the prior art, the beneficial effects of this utility model are:

[0027] Compared to existing technologies, this device does not directly pour the liquid silane coupling agent into the modification cylinder during the heating modification of magnesium hydroxide. Instead, it sprays the agent to ensure full contact with the surface of magnesium hydroxide, resulting in better modification of magnesium hydroxide. Furthermore, both magnesium hydroxide and the silane coupling agent are fed automatically and can be added quantitatively, ensuring accurate proportions and optimizing the magnesium hydroxide modification process. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0029] Figure 2 Schematic diagram of the installation of the second powder conveying pump;

[0030] Figure 3 Schematic diagram of water-cooled screw conveyor installation;

[0031] Figure label:

[0032] 1. Modified cylinder; 101. Temperature sensor; 2. Weighing equipment; 3. Sealing plate; 4. Powder conveying pump; 5. Conveying pipe; 6. Gear transmission assembly; 7. Disc; 8. Atomizing nozzle; 9. Rotary joint; 10. Metering pump; 11. Connecting rod; 12. Stirring roller; 13. Auxiliary stirring roller; 14. Jacket; 15. Air inlet pipe; 16. Exhaust pipe; 17. Exhaust valve; 18. Flow pipe; 19. Second powder conveying pump; 20. Storage tank; 21. Double stirring assembly; 22. Second solenoid valve; 23. Water-cooled screw conveyor. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. The present utility model will be further described with reference to the accompanying drawings and embodiments:

[0034] like Figure 1As shown, a magnesium hydroxide modification device includes a modification cylinder 1, which is equipped with a feed hopper and a discharge port (not labeled in the figure). A solenoid valve is installed at the discharge port, and a temperature sensor 101 is fixed inside the modification cylinder 1. The device also includes a weighing device 2, an automatic powder conveying assembly, a conveying pipe 5, a gear transmission assembly 6, a disc 7, an atomizing nozzle 8, a rotary joint 9, a metering pump 10, a stirring assembly, and a heating assembly.

[0035] The modified cylinder 1 is fixedly installed on the weighing device 2;

[0036] The automatic powder conveying assembly is connected to the feed hopper;

[0037] The conveying pipe 5 is rotatably connected to the modified cylinder 1, and one end of the conveying pipe 5 extends to the outside of the modified cylinder 1 and is connected to the gear transmission assembly 6 fixed on the modified cylinder 1 (the gear transmission assembly 6 is prior art and its principle is not described).

[0038] The hollow disc 7 is connected to one end of the conveying pipe 5 and several atomizing nozzles 8 are arranged on the circumference of the disc 7.

[0039] The output end of the rotary joint 9 is connected to the other end of the delivery pipe 5, and the input end of the rotary joint 9 is connected to the metering pump 10, which is fixed on the modified cylinder 1 and higher than the delivery pipe 5. The metering pump 10 is connected to the silane coupling agent tank (the silane coupling agent tank is not shown in the figure).

[0040] The stirring assembly is connected to the disc 7 and is spaced apart from the atomizing nozzles 8;

[0041] The heating component is installed on the outer wall of the modified cylinder 1 and is electrically connected to the temperature sensor 101.

[0042] Further refinements of the embodiments of this utility model, such as... Figure 1 As shown, the automatic powder conveying assembly includes a sealing plate 3 and a powder conveying pump 4. The sealing plate 3 is fixed on the feed hopper and is connected to the output pipeline of the powder conveying pump 4. The input pipeline of the powder conveying pump 4 is connected to the magnesium hydroxide tank (neither the powder conveying pump 4 nor the magnesium hydroxide tank is shown in the figure).

[0043] Further refinements of the embodiments of this utility model, such as... Figure 1 As shown, the stirring assembly includes a connecting rod 11 and stirring rollers 12. One end of the connecting rod 11 is welded to the center of the disc 7 and several sets of stirring rollers 12 are fixedly arranged around the circumference along the height direction of the connecting rod 11.

[0044] Further optimizations of the above-described embodiments, such as... Figure 1 As shown, the other end of the connecting rod 11 is fixed with symmetrically and inclined auxiliary stirring rollers 13.

[0045] Further refinements of the embodiments of this utility model, such as... Figure 1 As shown, the heating assembly includes a jacket 14, a steam generator, an inlet pipe 15, an exhaust pipe 16, and an exhaust valve 17. The jacket 14 is fixed on the outer wall of the modified cylinder 1 and the inlet pipe 15 and the exhaust pipe 16 are connected to the jacket 14. The inlet pipe 15 is connected to the steam generator through a hose, and the exhaust pipe 16 is equipped with an exhaust valve 17.

[0046] It should be noted that the temperature sensor 101, the weighing device 2, the powder conveying pump 4, the gear transmission assembly 6, and the metering pump 10 are all electrically connected to the controller, which is not shown in the figure.

[0047] The working process of this utility model is as follows:

[0048] First, magnesium hydroxide powder is transported into the modification cylinder 1 by the powder conveying pump 4 (while conveying, the controller controls the heating component to start working, thereby increasing the ambient temperature inside the modification cylinder 1. When the preset temperature range is reached, the temperature sensor 101 sends a signal to the controller, and the controller then controls the steam generator to stop. Subsequently, when the temperature drops, the steam generator starts working again to maintain the temperature inside the modification cylinder 1 within a stable range). As the feeding proceeds, when the weighing value of the weighing device 2 is about to reach the preset powder feeding mass value, the weighing device 2 sends a signal to the controller, and then the controller controls the powder conveying pump 4 to stop, thus completing the automatic quantitative feeding of powder.

[0049] The controller then controls the metering pump 10 to work. By pre-adjusting the delivery flow rate and operating time of the metering pump 10, a fixed volume of silane coupling agent can be injected each time. In summary, the accurate ratio of powder and silane coupling agent can be achieved. After the silane coupling agent is injected into the delivery pipe 5, it will move along the delivery pipe 5 and be injected into the disc 7. Then, it will be atomized and sprayed out through several atomizing nozzles 8, so that the contact between the silane coupling agent and magnesium hydroxide powder is more uniform and sufficient.

[0050] At the same time, the controller controls the gear transmission assembly 6 to achieve the coordinated rotation of the disc 7 and the stirring assembly. The rotation of the disc 7 results in a wider spray range of the silane coupling agent, and the rotation of the stirring assembly allows the modifier and magnesium hydroxide powder to be fully mixed and contacted. Meanwhile, by adding an auxiliary stirring roller 13, the mixing area can be further expanded to improve the modification effect of magnesium hydroxide powder.

[0051] Compared to existing technologies, this device does not directly pour the liquid silane coupling agent into the modification cylinder 1 during the heating modification of magnesium hydroxide. Instead, it sprays the agent to ensure full contact with the surface of magnesium hydroxide, resulting in better modification of magnesium hydroxide. Furthermore, both magnesium hydroxide and the silane coupling agent are fed automatically and can be added quantitatively, ensuring accurate proportions and optimizing the magnesium hydroxide modification process.

[0052] In some embodiments, such as Figure 2 As shown, the discharge port is connected to the flow pipe 18, which is connected to the second powder conveying pump 19 fixed on one side of the weighing device 2. The second powder conveying pump 19 is connected to the top of the storage tank 20. The storage tank 20 is equipped with a double stirring assembly 21 (the double stirring assembly 21 is existing technology and consists of a drive motor, a rotating shaft, and a stirring rod, which is not fully shown in the figure). The discharge port of the storage tank 20 is equipped with a second solenoid valve 22. In this embodiment, the modified magnesium hydroxide can be transferred to the storage tank 20 by negative pressure suction through the opening of the second powder conveying pump 19 and the discharge port solenoid valve. Then, the modified powder is dispersed by the double stirring assembly 21. In addition, the residual heat and self-friction of the powder can be used for further modification. At this time, a new round of magnesium hydroxide modification process can begin in the modification cylinder 1.

[0053] In other embodiments, such as Figure 3 As shown, the discharge port of the storage tank 20 is connected to the feed hopper of the water-cooled screw conveyor 23, and the discharge channel of the water-cooled screw conveyor 23 is connected to the collection container, which is not shown in the figure. In this embodiment, the magnesium hydroxide powder after secondary modification can be effectively cooled by the water-cooled screw conveyor 23, and then collected after cooling.

[0054] A further optimization of the above embodiment is that a horizontal mixer with water cooling effect can be added between the discharge port of the storage tank 20 and the feed hopper of the water-cooled screw conveyor 23 to perform initial cooling of the modified powder, thereby achieving a better cooling effect.

[0055] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A magnesium hydroxide modification device, comprising a modification cylinder (1), a feeding hopper and a discharge port are arranged on the modification cylinder (1), a solenoid valve is arranged on the discharge port and a temperature sensor (101) is fixedly arranged in the modification cylinder (1), characterized in that, The device further comprises a weighing device (2), a powder automatic conveying assembly, a conveying pipe (5), a gear transmission assembly (6), a disc (7), an atomizing nozzle (8), a rotary joint (9), a quantitative pump (10), a stirring assembly and a heating assembly, The weighing device (2) is fixed with a modified cylinder (1); The powder automatic conveying assembly is communicated with the feeding hopper; The conveying pipe (5) is rotatably connected with the modified cylinder (1), and one end of the conveying pipe (5) extends to the outside of the modified cylinder (1) and is connected with the gear transmission assembly (6) fixed on the modified cylinder (1); The disc (7) is hollow and communicated with one end of the conveying pipe (5), and a plurality of atomizing nozzles (8) are circumferentially arranged on the disc (7); The output end of the rotary joint (9) is communicated with the other end of the conveying pipe (5), and the input end of the rotary joint (9) is communicated with the quantitative pump (10) fixed on the modified cylinder (1) and higher than the conveying pipe (5), and the quantitative pump (10) is communicated with a silane coupling agent tank; The stirring assembly is connected with the disc (7) and is spaced from the atomizing nozzles (8); The heating assembly is arranged on the outer wall of the modified cylinder (1) and is electrically connected with a temperature sensor (101).

2. The magnesium hydroxide modification device according to claim 1, wherein The powder automatic conveying assembly comprises a blocking plate (3) and a powder conveying pump (4), the blocking plate (3) is fixed on the feeding hopper and is communicated with the output pipeline of the powder conveying pump (4), and the input pipeline of the powder conveying pump (4) is communicated with a magnesium hydroxide tank.

3. The magnesium hydroxide modification device according to claim 1, wherein The stirring assembly comprises a connecting rod (11) and a stirring roller (12), one end of the connecting rod (11) is welded with the center of the disc (7), and a plurality of groups of stirring rollers (12) are circumferentially fixed along the height direction of the connecting rod (11).

4. The magnesium hydroxide modification device according to claim 3, wherein The other end of the connecting rod (11) is fixed with symmetrically and obliquely distributed auxiliary stirring rollers (13).

5. The magnesium hydroxide modification apparatus according to claim 1, wherein The heating assembly comprises a jacket (14), a steam generator, an air inlet pipe (15), an air outlet pipe (16) and an air outlet valve (17), the jacket (14) is fixed on the outer wall of the modified cylinder (1), and the jacket (14) is communicated with the air inlet pipe (15) and the air outlet pipe (16), the air inlet pipe (15) is communicated with the steam generator through a hose, and the air outlet valve (17) is arranged on the air outlet pipe (16).

6. The magnesium hydroxide modification apparatus according to claim 1, wherein The discharge port is communicated with a flow pipe (18), the flow pipe (18) is communicated with a second powder conveying pump (19) fixed on one side of the weighing device (2), the second powder conveying pump (19) is communicated with the top of a storage barrel (20), the storage barrel (20) is provided with a double stirring assembly (21), and the discharge port of the storage barrel (20) is provided with a second electromagnetic valve (22).

7. The magnesium hydroxide modification device according to claim 6, wherein The discharge port of the storage barrel (20) is communicated with the feeding hopper of a water-cooled screw conveyor (23), and the discharge channel of the water-cooled screw conveyor (23) is communicated with a collection container.

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