A recovery device and recycling method for silicon carbide grinding waste

Abstract

The invention relates to the technical field of silicon carbide grinding waste separation, and discloses a recovery device and a reuse method for silicon carbide grinding waste. The device comprises a filter drum rotatable in a support box, the filter drum comprises a first filter screen, a filter chamber separated by a partition plate is arranged outside the first filter screen, a second filter screen is arranged in the filter chamber to separate the first separation zone and the second separation zone, and the first separation zone is provided with a rotatable flip partition; a first recovery bin is arranged at the center of the filter drum, and a second recovery bin and a third recovery bin are arranged below the filter drum; when the second separation zone is connected with the second recovery bin, the flip partition completes the separation of the first separation zone; a feed hopper is arranged on the support box, and the device executes the following reuse method: continuously obtaining grinding waste, continuously separating the grinding waste, and recovering solid matter or liquid in the separated grinding waste; the device has the advantage that the grinding liquid, abrasive particles and silicon carbide powder can be screened at the same time.

Description

Technical Field

[0001] The invention relates to the technical field of separation of silicon carbide grinding waste, and in particular to a recovery device and a recycling method of silicon carbide grinding waste. Background Art

[0002] Silicon carbide is a ceramic material with high hardness, high strength and high temperature stability. Its hardness is second only to diamond. In order to shape silicon carbide, high-precision grinding process is generally used for grinding. Silicon carbide has a very high hardness. When grinding silicon carbide, diamond grinding discs with higher hardness than silicon carbide are usually used for grinding. A large amount of waste will be generated during the grinding process, including grinding fluid, abrasive particles, and waste SiC powder. In addition, due to the presence of abrasive particles and silicon carbide powder in the grinding fluid, the grinding fluid cannot be reused, and the silicon carbide powder in it is also wasted.

[0003] The existing separation method needs to be carried out in steps, firstly solid-liquid separation is carried out to separate the grinding liquid, and then the abrasive particles and silicon carbide powder are screened, and the separation process is complicated.

[0004] In summary, there is an urgent need for a recovery device and a recycling method for silicon carbide grinding waste that can simultaneously screen grinding fluid, abrasive particles, and silicon carbide powder. Summary of the invention

[0005] In view of the problem that the recycling of silicon carbide grinding waste in the prior art needs to be carried out in steps, a recycling device for silicon carbide grinding waste is proposed, which can simultaneously screen the grinding liquid, abrasive particles and silicon carbide powder.

[0006] In order to solve the above problems, the technical solution of the present invention is:

[0007] A recycling device for silicon carbide grinding waste comprises a support box and a filter drum, wherein the filter drum is mounted in the support box and can rotate in the support box; the filter drum comprises at least an annular first filter screen, and partition plates are evenly arranged around the outside of the first filter screen, and the partition plates radially divide the outside of the first filter screen into a plurality of filter chambers, each of the filter chambers is provided with at least a second filter screen, and the second filter screen divides the filter chamber into a first separation area and a second separation area, wherein the filter holes of the second filter screen are larger than the filter holes of the first filter screen, and the first separation area is the area between the first filter screen and the second filter screen, and a flip partition is arranged in the first separation area, and the flip partition can rotate in the first separation area, and the flip partition can flip the first The separation zone is divided into a blocking zone and a release zone, and the flip partition has the same filtering capacity as the first filter screen; a first recovery bin is provided at the center of the filter drum, and the first recovery bin is connected to the first separation zone through the first filter screen, and a second recovery bin and a third recovery bin are provided below the filter drum, and the second recovery bin and the third recovery bin are both connected to the second separation zone directly opposite to them; wherein, when the second separation zone of the filter chamber is connected to the second recovery bin, the flip partition completes the separation of the first separation zone, and when the second separation zone of the filter chamber is connected to the third recovery bin, the blocking zone is connected to the release zone; a feed hopper is provided on the support box, and the feed hopper is located above the filter drum and connected to the filter drum, wherein the filter drum rotates continuously during filtration.

[0008] As a preferred technical solution, eight partition plates are provided, and the partition plates evenly divide the eight filter chambers.

[0009] As a preferred technical solution, the flip partition is rotated through a central rotating shaft, a limiting gear is provided at one end of the rotating shaft, and a limiting ring is provided on the limiting gear and the supporting box; the limiting gear can slide or rotate relative to the limiting ring.

[0010] As a preferred technical solution, the limiting gear includes a plurality of first flip teeth, sliding tooth grooves, and a start strip. The limiting ring is provided with a plurality of second flip teeth and a limit column. The first flip teeth and the second flip teeth are adapted to engage and flip. The two sides of the sliding tooth grooves slide relative to the limiting ring. The start strip is adapted to the limiting column to change the motion state of the limiting gear.

[0011] As a preferred technical solution, a positive pressure bin is further provided at the center of the filter drum, and the positive pressure bin is used to supply air to the filter chamber below it.

[0012] As a preferred technical solution, a hot air drying system is provided in the positive pressure bin.

[0013] As a preferred technical solution, the first recovery bin, the second recovery bin and the third recovery bin are all provided with negative pressure suction ports. The first recovery bin is used to recover the first material passing through the first filter net above it, the second recovery bin is used to recover the second material in the second separation area, and the third recovery bin is used to recover the third material in the first separation area.

[0014] As a preferred technical solution, two groups of the flip baffles are provided in each of the filter chambers.

[0015] In view of the problem that the recycling of silicon carbide grinding waste in the prior art needs to be carried out in steps, a method for recycling silicon carbide grinding waste capable of simultaneously screening grinding liquid, abrasive particles and silicon carbide powder is proposed.

[0016] In order to solve the above problems, the technical solution of the present invention is:

[0017] A method for recycling silicon carbide grinding waste comprises the following steps:

[0018] S1: Continuous acquisition of grinding waste;

[0019] S2: Continuously separating and treating the grinding waste; wherein S2 further comprises: continuously rotating the filter drum; continuously feeding the grinding waste into the feed hopper;

[0020] S3: Recover the solid or liquid matter in the separated grinding waste.

[0021] As a preferred technical solution, S3 includes: recovering the first material in the first recovery bin, recovering the second material in the second recovery bin, and recovering the third material in the third recovery bin.

[0022] Beneficial effects of the present invention:

[0023] The silicon carbide grinding waste recovery device of the present invention comprises a filter drum and a support box; a first filter screen is provided on the filter drum, which can filter the grinding liquid in the grinding waste; a second filter screen layer is provided on the first filter screen, which can filter the silicon carbide powder and the grinding liquid; the first filter screen and the second filter screen can filter the abrasive particles, silicon carbide powder and the grinding liquid at the same time; at the same time, the filter drum is an annular structure, and a plurality of filter chambers are separated by a partition plate on the first filter screen, and the filter chambers cooperate with the rotation of the filter drum to realize the partition filtration of the grinding waste that continuously flows in, and the filtration in each filter chamber does not interfere with each other. At the same time, as the rotation proceeds, the opening direction of the filter chamber changes continuously, and when passing through the feed hopper, the grinding waste is connected. The material is filtered and begins to be filtered, the first recovery bin completes the collection of the filtered grinding liquid, when the filter chamber is transferred to above the second recovery bin, the silicon carbide powder in the first separation zone is blocked in the blocking zone, so that the second recovery bin can collect the abrasive particles in the second separation zone, when the filter chamber is transferred to above the third recovery bin, the blocking zone is opened, and the silicon carbide powder in the first separation zone passes through the second separation zone into the third recovery bin, so that the third recovery bin can collect the silicon carbide powder, and the silicon carbide grinding waste recycling method is executed by the silicon carbide grinding waste recycling device of the present invention, the grinding waste continuously generated in the silicon carbide grinding process can be separated and processed in real time, and the separated grinding liquid can be reused in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional schematic diagram of a device for recycling silicon carbide grinding waste according to the present invention;

[0025] Figure 2 A schematic plan view of a cross section of a device for recovering silicon carbide grinding waste is provided;

[0026] Figure 3 It is a partial cutaway schematic diagram of a device for recycling silicon carbide grinding waste according to the present invention;

[0027] Figure 4 for Figure 3 A partial enlarged schematic diagram in the middle;

[0028] Figure 5 It is a partial schematic diagram of a device for recycling silicon carbide grinding waste according to the present invention;

[0029] Figure 6 for Figure 5 A partial enlarged schematic diagram of point B in the middle.

[0030] The reference numerals and components involved in the drawings are as follows:

[0031] 1. Filter drum; 2. Support box 3. Drive mechanism; 11. First filter screen; 12. Partition plate; 13. Filter chamber; 14. Second filter screen; 15. First separation zone; 16. Second separation zone; 17. Flip partition; 18. Rotating gear; 19. Limiting gear; 21. First recovery bin; 22. Second recovery bin; 23. Third recovery bin; 24. Positive pressure bin; 25. Feed hopper; 26. Limiting ring; 151. Blocking zone; 152. Release zone; 191. First flip tooth; 192. Sliding tooth groove; 193. Start strip; 241. Air outlet; 261. Second flip tooth; 262. Limiting column. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0033] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In order to better understand the recovery device and reuse method of silicon carbide grinding waste provided in this embodiment, the existing recovery device of silicon carbide grinding waste is briefly introduced below. The existing recovery device of silicon carbide grinding waste refers to filtering out the grinding liquid in the grinding waste through a centrifugal device to leave a mixture of abrasive particles and silicon carbide powder, drying the mixture, and then using the size difference between the abrasive particles and the silicon carbide powder to separate them through a vibrating screen to obtain silicon carbide powder; this separation method is firstly not consistent, and it needs to be processed after a certain amount of grinding waste is collected according to the capacity of the centrifugal device. After processing, the solids remain in the centrifugal device, and the solids after separation need to be cleaned and discharged before new separation can be carried out, resulting in discontinuous separation. At the same time, the separated solids need to be transferred to the vibrating screen for secondary screening to achieve the separation and utilization of silicon carbide powder, resulting in many separation steps.

[0035] In order to solve the above-mentioned problem of multiple separation steps and discontinuity, the present invention provides a recovery device and a method for recycling silicon carbide grinding waste, which specifically in this embodiment includes the following structure:

[0036] Please see attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 , Figure 1It is a three-dimensional schematic diagram of a device for recycling silicon carbide grinding waste according to the present invention; Figure 2 A schematic plan view of a cross section of a device for recovering silicon carbide grinding waste is provided; Figure 3 It is a partial cutaway schematic diagram of a device for recycling silicon carbide grinding waste according to the present invention; Figure 4 for Figure 3 A partial enlarged schematic diagram in the middle.

[0037] The silicon carbide grinding waste recovery device of the present invention comprises a filter drum 1 and a support box 2. The filter drum 1 as a whole is a hollow cylindrical structure. Both ends of the filter drum 1 are mounted in the side walls of the support box 2 and can rotate in the support box 2 under the drive of a driving mechanism 3. The innermost layer of the filter drum 1 is a first filter screen 11 in a hollow annular cylindrical shape. The first filter screen 11 is used to filter silicon carbide powder. A plurality of eight partition plates 12 extending axially and evenly arranged perpendicular to the first filter screen 11 are arranged around the outside of the first filter screen 11. The partition plates 12 cooperate with the baffles at both ends of the filter drum 1 to divide the outside of the first filter screen 11 into eight independently open filter chambers 13. Each filter chamber 13 is also provided with a second filter screen 14 for filtering abrasive particles. The second filter screen 14 is connected to the baffles at both ends of the filter drum 1 and the adjacent partition plates 12 on all sides, dividing the original filter chamber 13 into a first separation area 15 and a second separation area 16. The first separation area 15 is the space between the first filter screen 11 and the second filter screen 14, and the second separation area 16 is the space facing outward from the second filter screen 14. The outward refers to the direction perpendicularly away from the axis of the filter drum 1. Two flip baffles 17 are provided between the first separation zone 15. The flip baffles 17 are also made of a filter screen. The filter screen is the same as the first filter screen 11 and is used to separate silicon carbide powder. The rotating shaft on the flip baffle 17 is set on the baffles at both ends of the filter drum 1. The flip baffle 17 can rotate around the rotating shaft. When the two flip baffles 17 form the same plane, their two sides are attached to the adjacent partition plates 12, and the first separation zone 15 is radially divided into a barrier zone 151 and a release zone 152. The barrier zone 151 is located in the space between the flip baffle 17 and the first filter screen 11, and the release zone 152 is located in the space between the flip baffle 17 and the second filter screen 14. When the flip baffle 17 rotates, the barrier zone 151 is directly connected to the release zone 152. In order to ensure the sealing between the flip baffle 17 and the partition plate 12 and between the two flip baffles 17, a sealing strip can be provided on the side of the flip baffle 17.

[0038] The outer wall of at least one side of the filter drum 1 is provided with a rotating gear 18, and the driving mechanism 3, i.e., the motor, gear set, etc., drives the rotation of the rotating gear 18 to make the filter drum 1 rotate accordingly, with the horizontal plane passing through the axis of the filter drum 1 as the dividing line, and the inner cavity wall of the support box 2 in the upper half area is a semi-cylindrical arc surface, and the outermost end of the partition plate 12 in the radial direction is in contact with the arc cavity wall, and slides along the semi-circular cavity wall during rotation, and a sealing strip is also provided at the outer end of the partition plate 12, so that the liquid in the second separation area 16 in the upper half of the filter drum 1 will not flow out of the second separation area 16 along the gap between the second separation area 16 and the arc cavity wall. Conversely, the second separation area 16 located in the lower half of the filter drum 1 is directly connected to the second recovery bin 22 and the third recovery bin 23 in the support box 2 body, respectively. The second recovery bin 22 and the third recovery bin 23 are arranged in parallel in the support box 2 body. The cavity structure below the filter drum 1 inside, wherein the upper openings of the second recovery bin 22 and the third recovery bin 23 are connected to the second separation zone 16, and the dividing plate between the second recovery bin 22 and the third recovery bin 23 is a vertical horizontal plane of the axis of the filter drum 1; the second recovery bin 22 and the third recovery bin 23 are both connected to an independent negative pressure absorption device, and the area where the axis of the filter drum 1 is located is a hollow cylindrical cavity surrounded by the first filter screen 11, and the middle of the hollow cylindrical cavity is divided into upper and lower semi-cylinders by a horizontal plate, wherein the cavity where the upper semi-cylinder is located is the first recovery bin 21, and the upper part of the first recovery bin 21 is connected to the first separation zone 15 through the first filter screen 11, and the first recovery bin 21 is also provided with a negative pressure suction port for connecting to a negative pressure suction device, and the cavity of the lower semi-cylindrical cavity is a positive pressure bin 24, which is provided with an air supply port 241 for connecting to an air supply device.

[0039] The support box 2 is provided with a feed hopper 25 for feeding liquid. The feed hopper 25 is arranged on the arc wall at the upper end of the support box 2. Taking counterclockwise rotation as an example, the feed port connecting the feed hopper 25 and the arc wall is between 1 / 2π radian and 3 / 4π radian.

[0040] Please see attached Figure 5 , Attachment Figure 6 , Figure 5 It is a partial schematic diagram of a device for recycling silicon carbide grinding waste according to the present invention; Figure 6 for Figure 5A partial enlarged schematic diagram at B in the middle; in order to control the rotation of the flip partition 17 in the filter drum 1, a limit gear 19 is provided at least at one end of the rotating shaft, and the limit gear 19 includes a first flip tooth 191, a sliding tooth groove 192, and a start bar 193; the first flip tooth 191 is provided between the two sliding tooth grooves 192, and the curvature of the first flip tooth 191 determines the flip angle of the flip partition 17, and the start bar 193 is used to change the running state of the limit gear 19; a limit ring 26 is provided on the support box 2 on one side of which the limit gear 19 is provided, and the limit gear 19 can slide along the inner ring wall of the limit ring 26, that is, when the sliding tooth groove 192 on the limit gear 19 is in contact with the inner ring wall When the surfaces are facing each other, the racks on both sides of the sliding tooth groove 192 slide along the inner ring wall surface, and a second flip tooth 261 is provided on the inner ring wall surface of the limit ring 26, and the second flip tooth 261 is adapted to mesh with the first flip tooth 191, wherein the second flip tooth 261 on the inner ring wall surface is provided at three locations, and an X-axis is established in the radial direction of the filter drum 1, and the X-axis is rotated counterclockwise, the first location is 1 / 4π radian and has a rack radian that allows the flip partition 17 to rotate 180 degrees, and the other two locations are calculated by rotating the X-axis clockwise, one is located at a position of 1 / 2π radian, and has a rack radian that allows the flip partition 17 to rotate 90 degrees, and one is located between 3 / 4π radian and π radian, such as Figure 2 As shown, it has a rack curvature that allows the flip partition 17 to rotate 90 degrees. A limiting column 262 is provided on the outer wall of the limiting ring 26, and the limiting column 262 is adapted to the starting strip 193. Specifically, one end of the starting strip 193 is fixed on the limiting gear 19, and the other end is located on the surface of the limiting ring 26. On the rotation path of the starting strip 193, a limiting column 262 protruding from the surface of the limiting ring 26 is provided, and each limiting column 262 is provided on one side of the second flip tooth 261. When the starting strip 193 contacts the limiting column 262, the first flip tooth 191 just meshes with the second flip tooth 261.

[0041] The use of the present invention is as follows: taking clockwise rotation as an example, the driving mechanism 3 is started to rotate the filter drum 1 in the support box 2 at a uniform speed, and the grinding waste generated during the grinding process is introduced into the feed hopper 25 on the support box 2. The grinding waste in the feed hopper 25 flows into the second separation area 16 connected to the feed port, and in the rotation process, it follows the corresponding second separation area 16 to rotate clockwise. While rotating, the grinding liquid passes through the second filter screen 14 from the second separation area 16 into the first separation area 15, and then passes through the flip partition 17 and the first filter screen 11 in the first separation area 15 into the first recovery bin 21, and is sucked back by the first recovery bin 21 to the external collection container for reuse. In each filter compartment 13 , the abrasive particles are blocked by the second filter screen 14 in the second separation zone 16, and the silicon carbide powder is blocked by the flip partition 17 and the first filter screen 11 in the first separation zone 15. When the corresponding filter chamber 13 rotates to the first position of the second flip tooth 261, the start bar 193 on the corresponding limit gear 19 first contacts the limit column 262. Under the limit obstruction of the limit column 262, the limit gear 19 rotates, and the flip partition 17 can be driven to rotate through the rotating shaft. When the limit gear 19 starts to rotate, the first flip tooth 191 on the limit gear 19 is meshed with the second flip tooth 261 on the limit ring 26. When the first flip tooth 191 is disengaged from the second flip tooth 261, the The flip baffle 17 flips 180 degrees, and the next sliding tooth groove 192 on the limit gear 19 continues to slide in the limit ring 26 until it hits the next flip tooth; after the flip baffle 17 flips, the silicon carbide powder on the flip baffle 17 is flipped into the barrier area 151, and when the second separation area 16 rotates to be opposite to the second recovery bin 22, the abrasive particles gathered in the second separation area 16 fall into the second recovery bin 22, and at the same time, the silicon carbide powder is blocked in the barrier area 151, that is, under the obstruction of the reversed flip baffle 17, the silicon carbide powder entering the first separation area 15 will not fall into the second separation area 16, and when the corresponding filter chamber 13 enters above the third recovery bin 23, the limit The first flip tooth 191 of another section on the gear 19 starts to mesh and rotate with the corresponding second flip tooth 261 at another location. After the rotation is completed, the flip baffle 17 rotates 90 degrees, so that the flip baffle 17 is in a state of vertical axial diffusion. At this time, the barrier area 151 is connected with the release area 152, and the silicon carbide powder in the barrier area 151 passes through the second filter screen 14 and enters the third recovery bin 23 to complete the recovery of the silicon carbide powder; under the continuous rotation of the filter drum 1, the last section of the first flip tooth 191 and the second flip tooth 261 that flip the flip baffle 17 90 degrees complete the flip before the filter chamber 13 rotates above the horizontal plane, restores the initial state, and enters the next recycling and reuse filtration cycle.

[0042] Preferably, the silicon carbide grinding waste recovery device of the present invention implements the following silicon carbide grinding waste recycling method, comprising the following steps:

[0043] S1: continuously obtaining grinding waste; that is, directly feeding the grinding waste generated during the grinding process into the feed hopper 25, and the feeding method can be transferred by a pump or the feed hopper 25 is located at the outlet of the grinding waste of the grinding equipment;

[0044] S2: continuously rotating the filter drum 1 of the silicon carbide grinding waste recovery device of the present invention to continuously separate and process the grinding waste;

[0045] S3: recovering the solid or liquid substances in the separated grinding waste; specifically, recovering the first material in the first recovery bin 21, recovering the second material in the second recovery bin 22, and recovering the third material in the third recovery bin 23. The first material refers to the grinding liquid in the grinding waste, the second material refers to the abrasive particles in the grinding waste, and the third material refers to the silicon carbide powder in the grinding waste.

[0046] It should be noted that the silicon carbide grinding waste recovery device of the present invention comprises a filter drum 1 and a support box 2; a first filter screen 11 is provided on the filter drum 1, which can filter the grinding liquid in the grinding waste; a second filter screen 14 is provided on the first filter screen 11, which can filter the silicon carbide powder and the grinding liquid; the first filter screen 11 and the second filter screen 14 can filter the abrasive particles, silicon carbide powder and the grinding liquid at the same time; at the same time, the filter drum 1 is an annular structure, and a plurality of filter chambers 13 are separated by a partition plate 12 on the first filter screen 11, and the filter chambers 13 cooperate with the rotation of the filter drum 1 to realize the partition filtration of the grinding waste continuously flowing in, and the filtration in each filter chamber 13 does not interfere with each other. At the same time, as the rotation proceeds, the opening direction of the filter chamber 13 changes continuously, and when passing through the feed hopper 25, the filter chamber 13 is connected The grinding waste is ground and filtering begins, the first recovery bin 21 completes the collection of the filtered grinding liquid, and when the filter chamber 13 is turned to the top of the second recovery bin 22, the silicon carbide powder in the first separation zone 15 is blocked in the blocking zone 151, so that the second recovery bin 22 can collect the abrasive particles in the second separation zone 16, and when the filter chamber 13 is turned to the top of the third recovery bin 23, the blocking zone 151 is opened, and the silicon carbide powder in the first separation zone 15 passes through the second separation zone 16 into the third recovery bin 23, so that the third recovery bin 23 can collect the silicon carbide powder. By using the recovery device for silicon carbide grinding waste of the present invention to implement the method for recycling silicon carbide grinding waste, the grinding waste continuously generated during the silicon carbide grinding process can be separated and processed in real time, and the separated grinding liquid can be reused in time.

[0047] There are 8 groups of partition plates 12, which divide the filter drum 1 into 8 filter chambers 13. At the same time, the feed port where the feed hopper 25 is connected to the arc wall is not lower than 1 / 4 arc and does not exceed 1 / 2 arc, so that when the partition plate 12 just passes over the feed port in the counterclockwise rotation state, the next partition plate 12 adjacent to it just rotates through the horizontal position and moves upward, so that the grinding liquid coming down from the feed hopper 25 is first gathered at the position where the next partition plate 12 is connected to the first filter screen 11, instead of first flowing to the junction of the partition plate 12 and the arc wall, thereby reducing the risk of leakage. The feed port does not exceed 1 / 2 arc, which can reserve more filtration time for the filtering of grinding waste; it should be noted that the above scheme is a preferred implementation scheme, and the sealing strip between the partition plate 12 and the inner wall of the arc can avoid the problem of liquid leakage out of the first separation area 15. The partition plate 12 can also be 7 groups, 9 groups, etc. Correspondingly, the arc wall can exceed the semi-cylinder, but correspondingly, the interface area connecting the second recovery bin 22 and the third recovery bin 23 is reduced. The above other implementation schemes will not affect the realization of the corresponding functions, and the corresponding implementation scheme can be selected according to actual needs.

[0048] In order to make the separation and filtration of the grinding waste more complete, it should be understood that during the grinding process, the grinding liquid evenly enters the grinding position and is continuously discharged. When the discharged liquid continues to enter the feed hopper 25, the uniformly rotating filter drum 1 distributes the grinding waste entering the feed hopper 25 relatively evenly to each independent filter chamber 13. Taking the clockwise rotation in this embodiment as an example, the waste entering the filter chamber 13 first flows to the lower left under the action of gravity. When it turns to the right, the remaining grinding waste liquid gradually flows to the lower right, making full use of the filtration area of ​​the second filter screen 14 and accelerating the filtration efficiency through the flow of liquid. At the same time, the first recovery bin 21 further accelerates the filtration efficiency during the filtration process through negative pressure suction. Therefore, in some embodiments, according to the generation speed of the grinding waste, the corresponding diameter of the filter drum 1 is adapted, the area of ​​the filter screen is changed, and the rotation speed of the filter drum 1 and the negative pressure suction of the first recovery bin 21 are coordinated to make the grinding waste entering the filter chamber 13 fully filtered.

[0049] In order to keep the solid waste separated from the grinding waste dry and to enable it to be better separated from the filter, a hot air drying system is provided in the positive pressure bin 24 to heat and dry the materials in the first separation zone 15 and the second separation zone 16. This is a prior art and can be achieved by providing a device such as an electric heating wire in the air supply channel.

[0050] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the principle of the present invention. These improvements and supplements should also be regarded as the scope of protection of the present invention.

Claims

1. A device for recovering silicon carbide grinding waste, characterized in that: The filter drum comprises a support box and a filter drum, wherein the filter drum is mounted in the support box and can rotate in the support box; the filter drum comprises at least a first annular filter screen, and partition plates are evenly arranged around the outside of the first filter screen, and the partition plates radially divide the outside of the first filter screen into a plurality of filter chambers, and each of the filter chambers is provided with at least a second filter screen, and the second filter screen divides the filter chamber into a first separation area and a second separation area, wherein the filter holes of the second filter screen are larger than the filter holes of the first filter screen, and the first separation area is the area between the first filter screen and the second filter screen, and a flip partition is arranged in the first separation area, and the flip partition can rotate in the first separation area, and the flip partition can The filter drum can be divided into a blocking zone and a release zone; a first recovery bin is provided at the center of the filter drum, the first recovery bin is connected with the first separation zone through a first filter net, a second recovery bin and a third recovery bin are provided below the filter drum, the second recovery bin and the third recovery bin are both connected with the second separation zone directly opposite to them; wherein, the filter drum rotates continuously during filtration, when the second separation zone of the filter chamber is connected with the second recovery bin, the flip partition completes the separation of the first separation zone, and when the second separation zone of the filter chamber is connected with the third recovery bin, the blocking zone is connected with the release zone; a feed hopper is provided on the support box, the feed hopper is located above the filter drum and connected with the filter drum.

2. The device for recovering silicon carbide grinding waste according to claim 1, characterized in that: There are 8 partition plates, and the partition plates evenly divide the 8 filter chambers.

3. The device for recovering silicon carbide grinding waste according to claim 1, characterized in that: The flip partition is rotated through the central rotating shaft, one end of the rotating shaft is provided with a limit gear, and the limit gear and the support box are provided with a limit ring; the limit gear can slide or rotate relative to the limit ring.

4. The device for recovering silicon carbide grinding waste according to claim 3, characterized in that: The limiting gear includes a plurality of first flip teeth, a sliding tooth groove, and a start strip. The limiting ring is provided with a plurality of second flip teeth and a limiting column. The first flip teeth and the second flip teeth are adapted to engage and flip. The two sides of the sliding tooth groove slide relative to the limiting ring. The start strip is adapted to the limiting column to change the motion state of the limiting gear.

5. The recycling device for silicon carbide grinding waste according to claim 1, characterized in that: A positive pressure bin is also provided at the center of the filter drum, and the positive pressure bin is used to supply air to the filter chamber below it.

6. The device for recovering silicon carbide grinding waste according to claim 5, characterized in that: A hot air drying system is provided in the positive pressure bin.

7. The recycling device for silicon carbide grinding waste according to claim 1, characterized in that: The first recovery bin, the second recovery bin and the third recovery bin are all provided with negative pressure suction ports. The first recovery bin is used to recover the first material passing through the first filter net above it, the second recovery bin is used to recover the second material in the second separation area, and the third recovery bin is used to recover the third material in the first separation area.

8. The device for recovering silicon carbide grinding waste according to claim 1, characterized in that: Two groups of flip baffles are arranged in each of the filter chambers.

9. A method for recycling silicon carbide grinding waste, characterized in that: The following steps are involved: S1: Continuous acquisition of grinding waste; S2: using the silicon carbide grinding waste recovery device according to any one of claims 1 to 8 to continuously separate and process the grinding waste; wherein, S2 further comprises: continuously rotating the filter drum; continuously feeding the grinding waste into the feed hopper; S3: Recover the solid or liquid matter in the separated grinding waste.

10. The method for recycling silicon carbide grinding waste according to claim 9, characterized in that: The S3 further includes: recovering the first material in the first recovery bin, recovering the second material in the second recovery bin, and recovering the third material in the third recovery bin.

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