Combustion furnace for preparing silicon dioxide powder

Abstract

The invention discloses a silicon dioxide powder preparation combustion furnace which comprises a silicon storage barrel and a support, a combustion furnace body is fixedly connected to the interior of the support, a connecting frame is fixedly connected to the top of the combustion furnace body, and a processing barrel is fixedly connected to the interior of the connecting frame; the combustion furnace has the advantages that oxygen and carrier gas enter the treatment barrel through a gas inlet pipe, the oxygen and the carrier gas can be blown to a connecting plate to enable a limiting block to be separated from a limiting groove, then a sealing plate is blown open by the gas, the sealing plate is separated from the treatment barrel, and the treatment barrel and the combustion furnace body are sealed. Silicon powder, carrier gas and oxygen enter the treatment barrel to be mixed, and when oxygen and carrier gas are not conveyed any more, a first spring can drive a sealing plate to return to the interior of a connecting frame to seal the connecting frame, so that the mixture of the treatment barrel is prevented from entering a gas inlet pipe; by arranging the sealing mechanism, the situation that oxygen, carrier gas and silicon powder flow back into the gas inlet pipe, and consequently the preset material amount is changed can be prevented.

Description

Technical Field

[0001] This invention relates to the field of silica powder preparation technology, specifically to a combustion furnace for silica powder preparation. Background Technology

[0002] Spherical silica powder, due to its superior properties such as high dielectric constant, heat and moisture resistance, corrosion resistance, high filling capacity, low expansion, low stress, low impurities, low coefficient of friction, and low price, is widely used in high-tech fields such as copper clad laminates, epoxy molding compounds, aerospace, coatings, paints, adhesives, catalysts, pharmaceuticals, precision casting, high-grade ceramics, high-voltage components, and daily cosmetics.

[0003] Existing technologies, such as Chinese Patent [Application No. CN202020136972.4], disclose an apparatus for preparing spherical silica powder, including a material silo, a preheating silo, a carrier gas tank, a disperser, a combustion reactor, a gas tank, a cyclone separator, a bag filter, a finished product tank, and a gas pump. A first feed pipeline is fixedly connected between the bottom outlet of the material silo and the inlet of the preheating silo, and a first air inlet pipeline is fixedly connected between the lower outlet of the carrier gas tank and the first feed pipeline. Although this patent can effectively solve the problem that the domestic market cannot produce spherical silica powder with submicron and nano-sized particles, high sphericity, and high purity, and realize the localization of submicron and nano-spherical silica powder, the above patent has certain defects in use. For example, in practical applications, when the carrier gas, silica powder, and oxygen enter the preheating silo, they may flow back into the first air inlet pipeline and the second pipeline, thereby changing the predetermined material quantity. Therefore, a combustion furnace for preparing silica powder is needed. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a combustion furnace for preparing silica powder.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A combustion furnace for preparing silica powder includes a silica storage cylinder and a support. A combustion furnace body is fixedly connected inside the support. A connecting frame is fixedly connected to the top of the combustion furnace body. A processing cylinder is fixedly connected inside the connecting frame. A connecting pipe is fixedly connected between the processing cylinder and the combustion furnace body. A third valve is provided on the connecting pipe. Two sets of feed inlets are opened on the top side inside the processing cylinder. A sealing mechanism is fixedly connected inside each feed inlet. Both sets of sealing mechanisms are fixedly connected to air inlet pipes. Carrier gas and oxygen are respectively introduced into the two sets of air inlet pipes. A connecting pipe is fixedly connected to the bottom of the silica storage cylinder. The air inlet pipe for introducing carrier gas is fixedly connected to the connecting pipe. A first valve is installed on the connecting pipe. An igniter for burning a mixture of carrier gas, oxygen, and silica powder is provided on the combustion furnace body. A discharge pipe is fixedly connected to the bottom of the combustion furnace body. A second valve is provided on the discharge pipe.

[0006] Preferably, the sealing mechanism includes a connecting frame fixedly connected to the feed inlet, the connecting frame being fixedly connected to the air inlet pipe, a limiting frame being fixedly connected inside the connecting frame, four sets of first springs being fixedly connected to the bottom of the limiting frame, and a sealing plate being fixedly connected to the bottom of the first springs.

[0007] Preferably, four sets of telescopic rods are fixedly connected inside the limiting frame, and the four sets of telescopic rods are respectively located inside the four sets of first springs, with the bottom of the telescopic rods fixedly connected to the sealing plate.

[0008] Preferably, the inner walls on both sides of the connecting frame are provided with sliding grooves, and a connecting plate is slidably connected inside the sliding grooves. A limiting block is fixedly connected to one side of the connecting plate facing the sealing plate. The limiting block has a trapezoidal structure. Limiting grooves are provided on both sides of the sealing plate, and the limiting grooves are adapted to the limiting blocks.

[0009] Preferably, T-shaped grooves are provided on both sides of the top of the limiting frame, and T-shaped blocks are slidably connected inside the T-shaped grooves. One side of each of the two sets of T-shaped blocks is fixedly connected to two sets of connecting plates. A third spring is fixedly connected to the inner wall of one side of the T-shaped groove, and one side of the third spring is fixedly connected to the T-shaped block.

[0010] Preferably, a relief plate is fixedly connected to the top of the T-block, and the relief plate is inclined.

[0011] Preferably, a rotating rod is rotatably connected to the top inside of the processing cylinder, and a fan blade is fixedly connected to the outer surface of the rotating rod. A first motor is fixedly installed on the top of the processing cylinder, and the output end of the first motor is fixedly connected to the rotating rod through a coupling.

[0012] The beneficial effects of this invention are as follows: The combustion furnace for preparing silica powder provided by this invention, during use, involves supplying carrier gas into the processing cylinder. At this time, the first valve is opened, allowing the carrier gas to carry silica powder into the processing cylinder. Oxygen also enters the processing cylinder through the inlet pipe. The oxygen and carrier gas blow towards the connecting plate, causing the limiting block to disengage from the limiting groove. Then, the gas blows open the sealing plate, allowing the silica powder, carrier gas, and oxygen to mix in the processing cylinder. When oxygen and carrier gas are no longer supplied, the first spring drives the sealing plate back into the connecting frame, sealing the connecting frame and preventing the mixture from entering the inlet pipe. Then, the first motor is started to rotate the fan blades to disperse the carrier gas, oxygen, and silica powder. The dispersed mixture is then opened, and the third valve is opened, allowing the dispersed mixture to enter the combustion furnace body. The igniter is then activated to ignite the mixture, allowing it to fully combust and synthesize into liquid silica droplets. After natural cooling, the liquid silica droplets are discharged from the discharge pipe by opening the second valve, ready for the next step of the process. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the basic structure of the present invention; Figure 2 This is a schematic diagram of the processing cylinder structure of the present invention; Figure 3 This is a schematic diagram of the sealing mechanism of the present invention; Figure 4 This is a schematic diagram of the clearance plate structure of the present invention; Figure 5 This is a schematic diagram of the connecting frame structure of the present invention; Figure 6 This is a schematic diagram of the T-shaped block structure of the present invention. Detailed Implementation

[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0015] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," 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 invention 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 invention.

[0016] Example 1, such as Figure 1 - Figure 6 As shown, the present invention provides a combustion furnace for preparing silica powder, comprising a silica storage cylinder 1 and a support 2. A combustion furnace body 18 is fixedly connected inside the support 2. A connecting frame 3 is fixedly connected to the top of the combustion furnace body 18. A processing cylinder 4 is fixedly connected inside the connecting frame 3. A connecting pipe 5 is fixedly connected between the processing cylinder 4 and the combustion furnace body 18. A third valve 6 is provided on the connecting pipe 5. Two sets of feed inlets 7 are opened on the top side inside the processing cylinder 4. A sealing mechanism 8 is fixedly connected inside the feed inlets 7. Both sets of sealing mechanisms 8 are fixedly connected to... The gas inlet pipe 9 has two sets of gas inlet pipes, one for carrier gas and one for oxygen. A connecting pipe 10 is fixedly connected to the bottom of the silicon storage cylinder 1. The gas inlet pipe 9, which carries the carrier gas, is fixedly connected to the connecting pipe 10. A first valve 11 is installed on the connecting pipe 10. An igniter 12 is installed on the combustion furnace body 18 to burn the mixture of carrier gas, oxygen, and silicon powder. A discharge pipe 13 is fixedly connected to the bottom of the combustion furnace body 18. A second valve 14 is installed on the discharge pipe 13. The sealing mechanism 8 includes a connecting frame 81 fixedly connected to the inlet 7. The connecting frame 81 is connected to the gas inlet... Pipe 9 is fixedly connected, and a limiting frame 82 is fixedly connected inside the connecting frame 81. Four sets of first springs 83 are fixedly connected to the bottom of the limiting frame 82, and a sealing plate 84 is fixedly connected to the bottom of the first springs 83. In use, by transmitting carrier gas into the processing cylinder 4, the first valve 11 is opened, and the carrier gas will carry silicon powder into the processing cylinder 4. Oxygen also enters the interior of the processing cylinder 4 through the air inlet pipe 9. The oxygen and carrier gas will blow towards the sealing plate 84, so that the sealing plate 84 no longer seals the connecting frame 81, and the silicon powder, carrier gas and oxygen enter. The mixture is fed into the processing cylinder 4 for mixing. When oxygen and carrier gas are no longer being supplied, the first spring 83 will drive the sealing plate 84 back into the connecting frame 81 to seal the connecting frame 81 and prevent the mixture from entering the gas inlet pipe 9. The third valve 6 is opened, and the dispersed mixture enters the combustion furnace body 18. The igniter 12 is started to burn the mixture, so that the mixture is fully burned to synthesize liquid silica droplets. After natural cooling, the liquid silica droplets are discharged from the discharge pipe 13 by opening the second valve 14, and then wait for the next step of the process.

[0017] Example 2, as Figures 3-6 As shown, four sets of telescopic rods 85 are fixedly connected inside the limiting frame 82. The four sets of telescopic rods 85 are located inside the four sets of first springs 83 respectively. The bottom of the telescopic rods 85 is fixedly connected to the sealing plate 84. By setting up the telescopic rods 85, the sealing plate 84 can be prevented from shifting during the movement.

[0018] Both sides of the inner wall of the connecting frame 81 are provided with sliding grooves 86. A connecting plate 87 is slidably connected inside the sliding groove 86. A limit block 89 is fixedly connected to one side of the connecting plate 87 facing the sealing plate 84. The limit block 89 has a trapezoidal structure. Both sides of the sealing plate 84 are provided with limit grooves 811, which are adapted to the limit blocks 89. Both sides of the top of the limiting frame 82 are provided with T-shaped grooves 812. T-shaped blocks 813 are slidably connected inside the T-shaped grooves 812. One side of each of the two sets of T-shaped blocks 813 is fixedly connected to one of the two sets of connecting plates 87. A third spring 814 is fixedly connected to the inner wall, and one side of the third spring 814 is fixedly connected to the T-shaped block 813. Oxygen and carrier gas will blow towards the connecting plate 87 to make the limiting block 89 disengage from the limiting groove 811. Then the sealing plate 84 can be blown. When oxygen and carrier gas no longer flow to the processing cylinder 4, the third spring 814 will drive the T-shaped block 813 to retract, so that the limiting block 89 on the connecting plate 87 will be stuck in the limiting groove 811. This prevents the sealing plate 84 from disengaging from the connecting frame 81 when oxygen, carrier gas and silicon powder are mixed in the processing cylinder 4, which would cause backflow. This ensures that the predetermined feed rate will not be affected.

[0019] The top of the T-block 813 is fixedly connected to a relief plate 815, which is inclined. The relief plate 815 facilitates the blowing of oxygen and carrier gas, thereby better driving the connecting plate 87 to move.

[0020] Example 3, as Figure 2 As shown, a rotating rod 15 is rotatably connected to the top side of the inside of the processing cylinder 4, and a fan blade 16 is fixedly connected to the outer surface of the rotating rod 15. A first motor 17 is fixedly installed on the top of the processing cylinder 4, and the output end of the first motor 17 is fixedly connected to the rotating rod 15 through a coupling. The carrier gas, oxygen and silicon powder can be dispersed by starting the first motor 17 to rotate the fan blade 16. The dispersed mixture is then introduced into the combustion furnace body 18, and the dispersed mixture can be burned more completely.

[0021] Working principle: During use, carrier gas is supplied into the processing cylinder 4. At this time, the first valve 11 is opened, and the carrier gas carries silicon powder into the processing cylinder 4. Oxygen also enters the interior of the processing cylinder 4 through the air inlet pipe 9. The oxygen and carrier gas blow towards the connecting plate 87, causing the limiting block 89 to disengage from the limiting groove 811. Then, the gas blows open the sealing plate 84, and silicon powder, carrier gas, and oxygen enter the processing cylinder 4 and mix. When oxygen and carrier gas are no longer supplied, the first spring 83 will drive the sealing plate 84 back into the connecting frame 81, sealing the connecting frame 81 and preventing the mixture from entering the air inlet of the processing cylinder 4. Pipe 9 is then started, and the first motor 17 is started to rotate the fan blades 16 to disperse the carrier gas, oxygen and silicon powder. The dispersed mixture is then opened, and the third valve 6 is opened, allowing the dispersed mixture to enter the combustion furnace body 18. The igniter 12 is started to burn the mixture, so that it can be fully burned to synthesize liquid silicon dioxide droplets. After natural cooling, the liquid silicon dioxide droplets are discharged from the discharge pipe 13 by opening the second valve 14, and then waiting for the next step of the process. By setting up the sealing mechanism 8, oxygen, carrier gas and silicon powder can be prevented from flowing back into the gas inlet pipe 9, which would cause the predetermined material quantity to change.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combustion furnace for preparing silica powder, comprising a silica storage cylinder (1) and a support (2), wherein a combustion furnace body (18) is fixedly connected inside the support (2), characterized in that: A connecting frame (3) is fixedly connected to the top of the combustion furnace body (18). A processing cylinder (4) is fixedly connected inside the connecting frame (3). A connecting pipe (5) is fixedly connected between the processing cylinder (4) and the combustion furnace body (18). A third valve (6) is provided on the connecting pipe (5). Two sets of feed inlets (7) are opened on the top side inside the processing cylinder (4). A sealing mechanism (8) is fixedly connected inside the feed inlet (7). Both sets of sealing mechanisms (8) are fixedly connected to an air inlet pipe (9). Carrier gas and oxygen are introduced into the inlet pipe (9) respectively. The bottom of the silicon storage cylinder (1) is fixedly connected to the connecting pipe (10). The inlet pipe (9) for introducing carrier gas is fixedly connected to the connecting pipe (10). A first valve (11) is installed on the connecting pipe (10). An igniter (12) for burning the mixture of carrier gas, oxygen and silicon powder is provided on the combustion furnace body (18). A discharge pipe (13) is fixedly connected to the bottom of the combustion furnace body (18). A second valve (14) is provided on the discharge pipe (13).

2. The combustion furnace for preparing silica powder according to claim 1, characterized in that: The sealing mechanism (8) includes a connecting frame (81) fixedly connected to the feed port (7), the connecting frame (81) being fixedly connected to the air inlet pipe (9), a limiting frame (82) being fixedly connected inside the connecting frame (81), and four sets of first springs (83) being fixedly connected to the bottom of the limiting frame (82), and a sealing plate (84) being fixedly connected to the bottom of the first springs (83).

3. The combustion furnace for preparing silica powder according to claim 2, characterized in that: The limiting frame (82) is internally fixedly connected to four sets of telescopic rods (85), which are located inside the four sets of first springs (83). The bottom of the telescopic rods (85) is fixedly connected to the sealing plate (84).

4. The combustion furnace for preparing silica powder according to claim 2, characterized in that: The inner walls of both sides of the connecting frame (81) are provided with sliding grooves (86), and a connecting plate (87) is slidably connected inside the sliding groove (86). A limiting block (89) is fixedly connected to one side of the connecting plate (87) facing the sealing plate (84). The limiting block (89) is a trapezoidal structure. A limiting groove (811) is provided on both sides of the sealing plate (84). The limiting groove (811) is adapted to the limiting block (89).

5. The combustion furnace for preparing silica powder according to claim 4, characterized in that: The top two sides of the limiting frame (82) are provided with T-shaped grooves (812), and T-shaped blocks (813) are slidably connected inside the T-shaped grooves (812). One side of the two sets of T-shaped blocks (813) is fixedly connected to two sets of connecting plates (87) respectively. A third spring (814) is fixedly connected to the inner wall of one side of the T-shaped groove (812), and one side of the third spring (814) is fixedly connected to the T-shaped block (813).

6. The combustion furnace for preparing silica powder according to claim 5, characterized in that: The top of the T-block (813) is fixedly connected to a relief plate (815), which is inclined.

7. The combustion furnace for preparing silica powder according to claim 1, characterized in that: The processing cylinder (4) is rotatably connected to the top side of the interior, and a fan blade (16) is fixedly connected to the outer surface of the rotating rod (15). A first motor (17) is fixedly installed on the top of the processing cylinder (4), and the output end of the first motor (17) is fixedly connected to the rotating rod (15) through a coupling.

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