A calcium carbide slag activation slurry solid-liquid separation device

Abstract

The present application relates to solid-liquid separation, and provides a calcium carbide slag activation slurry solid-liquid separation device, which comprises an open frame body, a plurality of first filter boxes and a plurality of second filter boxes alternately arranged in the frame body, a first grouting device and a first aeration device connected with the first filter box, a second grouting device and a second aeration device connected with the second filter box, and a first driving device for driving the first filter box and the second filter box to rotate; the plurality of first filter boxes and the plurality of second filter boxes are located at the same height, and a liquid discharge gap is arranged between adjacent first filter boxes and second filter boxes. The calcium carbide slag activation slurry solid-liquid separation device can efficiently separate the calcium carbide slag slurry.

Description

Technical Field

[0001] This invention relates to the technical field of solid-liquid separation, and more specifically, to a solid-liquid separation device for activated carbide slag slurry. Background Technology

[0002] Calcium carbide slag is the waste residue mainly composed of calcium hydroxide after the hydrolysis of calcium carbide to obtain acetylene gas. After activation with an activating agent, calcium carbide slag can replace lime in the alumina leaching process during aluminum production.

[0003] Red mud is an industrial solid waste discharged during the extraction of alumina in the aluminum industry. When reusing red mud, dealkalization (i.e., removing its strong alkalinity) is a crucial and fundamental step. Red mud is usually mixed with lime for dealkalization, but carbide slag can, to some extent, replace lime in this process. Furthermore, the carbide slag itself is activated after the red mud dealkalization process, thus allowing it to be applied in aluminum production processes.

[0004] After calcium carbide slag and red mud are mixed into a slurry, solid-liquid separation is required. The resulting liquid phase contains dealkalized red mud, and the solid phase contains calcium carbide slag. However, because the calcium carbide slag has been thoroughly ground, its particle size is relatively low. In solid-liquid separation, besides the settling method (time-consuming), there is also the filtration method (time-efficient). However, due to the low particle size of the calcium carbide slag, clogging is easily caused, requiring frequent cleaning of the filter components during the separation process. Therefore, a more efficient solid-liquid separation device needs to be designed. Summary of the Invention

[0005] The purpose of this invention is to provide a solid-liquid separation device for activated carbide slag slurry, which can efficiently separate the solid and liquid components of carbide slag slurry.

[0006] The embodiments of the present invention are achieved through the following technical solutions: The solid-liquid separation device for activated slurry of carbide slag of the present invention includes a frame with openings at both the top and bottom, a plurality of first filter boxes and second filter boxes arranged alternately in sequence within the frame, a first grouting device and a first aeration device connected to the first filter box, a second grouting device and a second aeration device connected to the second filter box, and a first driving device for driving the first filter box and the second filter box to rotate; the plurality of first filter boxes and the plurality of second filter boxes are all located at the same height, and a drain gap is provided between adjacent first filter boxes and second filter boxes.

[0007] Furthermore, the first driving device includes a support ring sleeved on the outer wall of the frame, support rods disposed on the sides of the first filter box and the second filter box, a pair of support plates respectively connected to both sides of the support ring, a pair of motors, and a support column for supporting the motors; the plurality of support rods are all connected to the support ring, and the output shaft of the motor is fixedly connected to the support plate.

[0008] Furthermore, the support rings are provided in pairs, and both of the support rings are connected to the support plate.

[0009] Furthermore, the lower side of the frame is provided with multiple partitions, and both sides of the first filter box and the second filter box are slidably connected to the partitions.

[0010] Furthermore, it also includes a second drive device for driving the frame to rise and fall.

[0011] Furthermore, the second driving device includes an elongated through hole on the support plate, a pair of pull rods respectively disposed on both sides of the frame, a sleeve rotatably connected to the pull rods, a pull rope connected to the sleeve, and a hoist connected to the pull rope; the pull rods are disposed through the through hole.

[0012] Furthermore, a clearance groove is provided on the upper side of the frame along the vertical direction, and the clearance groove is used for the support rod to pass through.

[0013] Furthermore, the two inner sidewalls of the frame are provided with partition strips; the partition strips are located between the adjacent first filter box and the second filter box.

[0014] Further, the first grouting device includes a first pump body and a first grouting pipe for connecting the first pump body and the first filter box; the second grouting device includes a second pump body and a second grouting pipe for connecting the second pump body and the second filter box; the first air supply device includes a first air compressor and a first air guide pipe for connecting the first air compressor and the first filter box; the second air supply device includes a second air compressor and a second air guide pipe for connecting the second air compressor and the second filter box.

[0015] The technical solution of this invention has at least the following advantages and beneficial effects: In the solid-liquid separation device for activated carbide slag slurry of this invention, the slurry to be separated is fed into multiple first filter boxes via a first grouting device, and into multiple second filter boxes via a second grouting device. During filtration, high-pressure air is continuously injected into the first filter boxes via a first aeration device to pressurize the slurry in the first filter boxes, and the liquid in the first filter boxes is discharged through the drain gap (the same applies to the second filter boxes). In the early stage of filtration, the first and second filter boxes perform filtration operations simultaneously. In the later stage of filtration, due to a certain degree of blockage in the first and second filter boxes, they alternate operation for several cycles. Specifically, when the first filter box is filtering, no slurry is injected into the second filter box, and no pressure is applied. Thus, when the liquid passes through the first filter box, it impacts both sides of the second filter box, thereby backwashing the second filter box and flushing out impurities blocked in the filter holes of the second filter box. Then, the second filter box begins filtration, and the first filter box is not injected with slurry, is not pressurized, and is backwashed. By repeatedly rinsing each other back and forth, the first and second filter boxes can be effectively backwashed, ensuring optimal filtration efficiency without requiring shutdown for cleaning. After one batch of filtration is completed, the first drive device rotates the first and second filter boxes to discharge the accumulated solid particles. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the solid-liquid separation device for activated slurry of carbide slag provided in an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the internal structure of the solid-liquid separation device for activated carbide slag slurry provided in an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the frame structure from one perspective, provided in an embodiment of the present invention.

[0020] Figure 4 This is a two-view structural schematic diagram of the frame provided in an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of the first filter box portion provided in an embodiment of the present invention.

[0022] Icons: 11-Frame, 12-Giveaway groove, 13-Drainage gap, 14-Baffle, 15-Separator strip, 16-Pull rod, 17-Sleeve, 18-Pull rope, 21-First filter box, 22-First grouting pipe, 23-First air guide pipe, 24-Second filter box, 25-Support rod, 26-Support ring, 27-Support plate, 28-Motor, 29-Support column, 210-Through hole. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] In the description of this invention, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0027] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] Example

[0029] The following description, in conjunction with specific embodiments, further illustrates the point, as shown in the appendix. Figure 1 - Appendix Figure 5 As shown, the solid-liquid separation device for activated carbide slag slurry includes a frame 11 with openings at both the top and bottom, multiple first filter boxes 21 and second filter boxes 24 alternately arranged in sequence within the frame 11, a first grouting device and a first aeration device connected to the first filter boxes 21, a second grouting device and a second aeration device connected to the second filter boxes 24, and a first driving device for driving the first filter boxes 21 and second filter boxes 24 to rotate. The multiple first filter boxes 21 and multiple second filter boxes 24 are all located at the same height, and a drain gap 13 is provided between adjacent first filter boxes 21 and second filter boxes 24. Specifically, during use, the slurry to be separated is fed into the multiple first filter boxes 21 through the first grouting device, and the slurry is fed into the multiple second filter boxes 24 through the second grouting device. During filtration, high-pressure air is continuously injected into the first filter boxes 21 through the first aeration device to pressurize and filter the slurry in the first filter boxes 21. The liquid in the first filter boxes 21 is discharged through the drain gap 13 (the same applies to the second filter boxes 24). In the initial stage of filtration, the first filter box 21 and the second filter box 24 operate simultaneously. In the later stage of filtration, due to some degree of clogging in both filter boxes 21 and 24, they alternate operation for several cycles. Specifically, while the first filter box 21 is filtering, no slurry is injected into the second filter box 24, and no pressure is applied. As the liquid passes through the first filter box 21, it impacts both sides of the second filter box 24, thus backwashing the second filter box 24 and flushing out impurities clogging its filter holes. Then, the second filter box 24 begins filtration, and the first filter box 21 is backwashed without slurry injection or pressure. This back-and-forth rinsing several times effectively backwashes both the first and second filter boxes 21 and 24, ensuring optimal filtration efficiency without requiring shutdown for cleaning. After a batch of filtration is completed, the first filter box 21 and the second filter box 24 are flipped by the first drive device to discharge the solid particles accumulated therein. (It should be noted that since the solid content in the slurry is not high, it is usually filtered multiple times. When a certain amount of solid has accumulated in the first filter box 21 and the second filter box 24, the solid is discharged.) When discharging, simply open the lids of the first filter box 21 and the second filter box 24 and pour out the solid.

[0030] The first driving device in this embodiment includes a support ring 26 sleeved on the outer wall of the frame 11, support rods 25 disposed on the sides of the first filter box 21 and the second filter box 24, a pair of support plates 27 respectively connected to both sides of the support ring 26, a pair of motors 28, and a support column 29 for supporting the motors 28; the multiple support rods 25 are all connected to the support ring 26, and the output shaft of the motor 28 is fixedly connected to the support plate 27. A pair of support rings 26 are provided, and both pairs of support rings 26 are connected to the support plate 27. Specifically, the pair of support rings 26 and the multiple support rods 25 can effectively support the multiple first filter boxes 21 and the multiple second filter boxes 24. By driving the support plate 27 to rotate through the motor 28, the first filter box 21, the second filter box 24, and the frame 11 can be flipped over as a whole, facilitating the removal of solids.

[0031] In this embodiment, the lower side of the frame 11 is provided with multiple partitions 14, and both sides of the first filter box 21 and the second filter box 24 are slidably connected to the partitions 14. A second driving device is also included to drive the frame 11 to rise and fall. The second driving device includes an elongated through hole 210 on the support plate 27, a pair of pull rods 16 respectively located on both sides of the frame 11, a sleeve 17 rotatably connected to the pull rods 16, a pull rope 18 connected to the sleeve 17, and a lifting mechanism connected to the pull rope 18; the pull rods 16 pass through the through hole 210. Specifically, since slurry needs to be repeatedly poured into the first filter box 21 and the second filter box 24 for filtration, solid particles will continuously accumulate at the bottom of the first filter box 21 and the second filter box 24. Therefore, during filtration, after each filtration, a hoist can be used to pull the frame 11 upward a certain distance via the pull rope 18, sleeve 17, and pull rod 16, which is equivalent to pulling the partition 14 upward, so that the partition 14 covers the solid particles at the bottom of the first filter box 21 and the second filter box 24. This reduces the squeezing force of the solid particles at the bottom of the first filter box 21 and the second filter box 24 on the side walls, and prevents them from entering the filter holes. The hoist can also be replaced with a simple electric hoist or other equipment that can provide vertical pulling force.

[0032] In this embodiment, a clearance groove 12 is provided on the upper side of the frame 11 along the vertical direction, and the clearance groove 12 is used to support the rod 25 to pass through.

[0033] In this embodiment, the two inner sidewalls of the frame 11 are provided with partition strips 15; the partition strips 15 are located between the adjacent first filter box 21 and second filter box 24.

[0034] In this embodiment, the first grouting device includes a first pump body and a first grouting pipe 22 for connecting the first pump body and the first filter box 21; the second grouting device includes a second pump body and a second grouting pipe for connecting the second pump body and the second filter box 24; the first air supply device includes a first air compressor and a first air guide pipe 23 for connecting the first air compressor and the first filter box 21; the second air supply device includes a second air compressor and a second air guide pipe for connecting the second air compressor and the second filter box 24. Specifically, for most of the filtration time, the first filter box 21 and the second filter box 24 perform filtration synchronously. Only during the intermediate filtration time (i.e., when backwashing of the first filter box 21 and the second filter box 24 is required) will the first filter box 21 and the second filter box 24 perform filtration operations alternately. Therefore, it is necessary to design independently operating first grouting pipe 22 and second grouting pipe, as well as independently operating first air compressor and second air compressor.

[0035] In summary, the solid-liquid separation device for activated carbide slag slurry of this embodiment, during use, delivers the slurry to be separated into multiple first filter boxes 21 via a first grouting device, and delivers the slurry into multiple second filter boxes 24 via a second grouting device. During filtration, high-pressure air is continuously injected into the first filter boxes 21 via a first aeration device to pressurize the slurry in the first filter boxes 21, and the liquid in the first filter boxes 21 is discharged through the discharge gap 13 (the same applies to the second filter boxes 24). In the early stage of filtration, the first filter boxes 21 and the second filter boxes 24 perform filtration operations simultaneously. In the later stage of filtration, due to a certain degree of blockage in the first filter boxes 21 and the second filter boxes 24, they alternate operation for several cycles. Specifically, when the first filter box 21 is filtering, no slurry is injected into the second filter box 24 and no pressure is applied. In this way, when the liquid passes through the first filter box 21, it impacts both sides of the second filter box 24, thereby backwashing the second filter box 24 and flushing out the impurities blocked in the filter holes of the second filter box 24. Then, the second filter box 24 begins filtration, while the first filter box 21 is not injected with slurry or pressurized, and is backwashed. This back-and-forth rinsing several times effectively backwashes both the first and second filter boxes 24, ensuring optimal filtration efficiency without requiring machine shutdown for cleaning. After one batch of filtration is completed, the first drive device rotates the first and second filter boxes 21 and 24 to discharge any accumulated solid particles.

[0036] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A solid-liquid separation device for activated calcium carbide slag slurry, characterized in that: It includes a frame (11) with openings at both the top and bottom, a plurality of first filter boxes (21) and second filter boxes (24) arranged alternately in the frame (11), a first grouting device and a first aeration device connected to the first filter box (21), a second grouting device and a second aeration device connected to the second filter box (24), and a first driving device for driving the first filter box (21) and the second filter box (24) to rotate; The first drive device is used to discharge solid particles accumulated in the first filter box (21) and the second filter box (24); Multiple first filter boxes (21) and multiple second filter boxes (24) are located at the same height, and a drain gap (13) is provided between adjacent first filter boxes (21) and second filter boxes (24); The first filter box (21) and the second filter box (24) operate alternately. When the first filter box (21) is filtering, the second filter box (24) is not injected with slurry or pressurized. The liquid backwashes the second filter box (24). Then the second filter box (24) starts filtering. The first filter box (21) is not injected with slurry or pressurized. The first filter box (21) is backwashed.

2. The solid-liquid separation device for activated carbide slag slurry according to claim 1, characterized in that: The first driving device includes a support ring (26) sleeved on the outer wall of the frame (11), a support rod (25) disposed on the side of the first filter box (21) and the second filter box (24), a pair of support plates (27) respectively connected to both sides of the support ring (26), a pair of motors (28), and a support column (29) for supporting the motors (28); Multiple support rods (25) are connected to the support ring (26), and the output shaft of the motor (28) is fixedly connected to the support plate (27).

3. The solid-liquid separation device for activated carbide slag slurry according to claim 2, characterized in that: The support rings (26) are provided in pairs, and both of the support rings (26) are connected to the support plate (27).

4. The solid-liquid separation device for activated carbide slag slurry according to claim 2, characterized in that: The lower side of the frame (11) is provided with multiple partitions (14), and both sides of the first filter box (21) and the second filter box (24) are slidably connected to the partitions (14).

5. The solid-liquid separation device for activated carbide slag slurry according to claim 4, characterized in that: It also includes a second drive device for driving the frame (11) to rise and fall.

6. The solid-liquid separation device for activated carbide slag slurry according to claim 5, characterized in that: The second driving device includes an elongated through hole (210) opened on the support plate (27), a pair of pull rods (16) respectively provided on both sides of the frame (11), a sleeve (17) rotatably connected to the pull rods (16), a pull rope (18) connected to the sleeve (17), and a hoist connected to the pull rope (18). The pull rod (16) is disposed through the through hole (210).

7. The solid-liquid separation device for activated carbide slag slurry according to claim 6, characterized in that: The frame (11) has a vertically oriented relief groove (12) on its upper side, through which the support rod (25) passes.

8. The solid-liquid separation device for activated carbide slag slurry according to claim 1, characterized in that: The frame (11) has two opposing inner sidewalls provided with partition strips (15); the partition strips (15) are located between the adjacent first filter box (21) and second filter box (24).

9. The solid-liquid separation device for activated carbide slag slurry according to claim 1, characterized in that: The first grouting device includes a first pump body and a first grouting pipe (22) for connecting the first pump body to the first filter box (21); the second grouting device includes a second pump body and a second grouting pipe for connecting the second pump body to the second filter box (24); The first air filling device includes a first air compressor and a first air pipe (23) for connecting the first air compressor and the first filter box (21); the second air filling device includes a second air compressor and a second air pipe for connecting the second air compressor and the second filter box (24).

Images