Automatic force rotary solid-liquid separation device

Abstract

The utility model discloses a kind of automatic force rotary solid-liquid separation devices, comprising: separation bucket, its upper portion is equipped with slurry inlet, bottom is equipped with discharge port, the flow of the slurry inlet is greater than the flow of the discharge port, overflow port between slurry inlet and discharge port is equipped in the lateral wall of the separation bucket;Discharge component, including vertical rotation connection in the separation bucket of rotating shaft, the rotating shaft is equipped with the pusher cooperation with the discharge port;Power blade, be set on the rotating shaft and be located in slurry flow channel, for receiving the impact kinetic energy of slurry and drive the rotating shaft rotation.The utility model can utilize slurry self kinetic energy to drive the discharge of auxiliary solid-liquid separation, without other external power, effectively solve the problem of solid matter accumulation blockage outlet, realize the continuous stable operation of device.

Description

Technical Field

[0001] This utility model relates to the field of mineral salt mining technology, specifically to an automatic force-driven rotary solid-liquid separation device. Background Technology

[0002] In the field of salt mining, well filling using underground solution cavities has become an effective means of controlling geological hazards. This method typically involves mixing industrial waste liquids (such as ammonia-soda waste liquid, salt production wastewater, and brine) with solid waste residues (such as alkali residue, desulfurization gypsum, salt mud, and fly ash) to form an injection slurry, which is then injected into underground salt caverns using injection equipment. However, such injection slurries often contain large solid particles. These large particles can severely abrade injection pumps, valves, and pipelines during high-pressure transportation, significantly reducing equipment lifespan, increasing maintenance costs, and in severe cases, causing equipment leaks, production interruptions, and even environmental safety accidents. Therefore, separating and removing large solid particles before slurry injection is crucial.

[0003] Currently, the main solid-liquid separation technologies available for well injection slurry pretreatment include decantation, filtration, centrifugation, and gravity sedimentation. Among these, gravity sedimentation is widely used due to its relatively simple structure, large processing capacity, and low energy consumption. Its basic principle is to utilize the density difference between solid particles and liquid, causing the particles to settle to the bottom of the container under gravity, while the supernatant is discharged from the top. However, in practical applications for separating large particles in well injection slurry, large solid particles often settle and accumulate at the bottom of the container, causing mutual compression, bridging, or blockage of the discharge outlet structure, resulting in poor or even blocked discharge channels. This not only affects the continuity and stability of the separation process but also reduces the overall separation efficiency. Utility Model Content

[0004] The purpose of this invention is to provide an automatic rotary solid-liquid separation device that utilizes the kinetic energy of the slurry itself to drive the discharge during solid-liquid separation, effectively solving the problem of solid material accumulation and clogging of the outlet.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: an automatic force-driven rotary solid-liquid separation device, comprising: A separation tank has a slurry inlet at the top and a discharge outlet at the bottom. The flow rate of the slurry inlet is greater than the flow rate of the discharge outlet. The side wall of the separation tank has an overflow port located between the slurry inlet and the discharge outlet. The discharge assembly includes a rotating shaft vertically rotatably connected inside the separation tank, and the rotating shaft is provided with a pusher that cooperates with the discharge outlet; The power blades are mounted on the rotating shaft and located in the slurry flow channel, and are used to receive the impact kinetic energy of the slurry and drive the rotating shaft to rotate.

[0006] A further improvement of this invention is that the power blade is disposed inside the separation tank, and its position corresponds to the slurry inflow direction of the slurry inlet, so as to directly receive the slurry impact.

[0007] A further improvement of this utility model is that the slurry inlet is connected to the feed pipe, the feed pipe is provided with a blade chamber section located above the separation tank, the upper end of the rotating shaft passes through the blade chamber section and is coaxially rotatably connected to it, and the power blade is arranged in the blade chamber section.

[0008] A further improvement of this utility model is that the slurry inlet is located on one side of the separation tank, the overflow port is located on the other side of the separation tank, and a baffle plate is provided inside the separation tank between the slurry inlet and the overflow port, with the upper end of the baffle plate being higher than the height of the overflow port.

[0009] A further improvement of this utility model is that a high-pressure backwasher is provided at the bottom of the separation tank, and the nozzle of the high-pressure backwasher faces the discharge port.

[0010] A further improvement of this utility model is that the pushing component is a spiral blade or a propulsion blade.

[0011] A further improvement of this utility model is that a protective sleeve is fitted on the rotating shaft above the pushing member, and the protective sleeve is fixed inside the separation barrel by a bracket.

[0012] A further improvement of this utility model is that the upper part of the separation bucket is a cylinder or prism, and the lower part is a frustum, prism, or hemisphere.

[0013] The beneficial effects of this utility model are as follows: This invention utilizes the kinetic energy of the slurry itself to drive the discharge during solid-liquid separation. The pusher rotates with the shaft to continuously agitate the bottom particles, preventing the settled particles from bridging and blocking the discharge outlet due to compression, ensuring smooth discharge, effectively solving the problem of solid material accumulation and clogging the outlet, and requiring no external power source, thus reducing energy consumption.

[0014] The flow difference design between the overflow port and the discharge port of this utility model ensures a stable liquid level in the separation tank, allowing small particles to be discharged from the overflow port along with the supernatant, thus achieving continuous separation. The baffle plate changes the flow direction of the slurry, extends the flow path of the slurry in the tank, and guides the slurry to bypass the baffle plate and be discharged from the overflow port, avoiding the slurry being discharged directly from the overflow port when it is pumped in from the inlet.

[0015] This invention utilizes a high-pressure backwasher located at the bottom of the separation tank, with its nozzle oriented towards the discharge outlet. By adjusting the flow rate of the high-pressure liquid, the upward hydrodynamic force generated by the high-pressure jet, combined with the inherent buoyancy of the slurry, creates a combined force sufficient to overcome the gravity of smaller solid particles, thus suspending and lifting them, which are then discharged through the overflow outlet. However, for larger solid particles with higher particle size and density, this combined force is insufficient to overcome their gravity, causing them to continue settling and accumulating at the bottom of the tank before being discharged through the outlet. Simultaneously, the high-pressure jet effectively impacts and breaks down bridging structures or blockage points formed in the settled particle layer, ensuring unobstructed discharge and further preventing blockages.

[0016] This invention can place the power blade inside the blade chamber section of the feed pipe, and improve the driving efficiency by concentrating the high-pressure slurry flow from the feed pipe to impact the blade. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model.

[0018] Figure 2 This is a structural schematic diagram of Embodiment 2 of the present invention.

[0019] In the diagram, 1-separation tank, 2-slurry inlet, 3-discharge outlet, 4-overflow outlet, 5-rotating shaft, 6-push component, 7-power blade, 8-feed pipe, 9-blade chamber section, 10-baffle plate, 11-high pressure backwasher, 12-protective sleeve. Detailed Implementation

[0020] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. Example

[0021] Combination Figure 1 It is known that an automatic force-driven rotary solid-liquid separation device includes: Separation tank 1 has a slurry inlet 2 at the top and a discharge outlet 3 at the bottom. The flow rate of the slurry inlet 2 is greater than the flow rate of the discharge outlet 3. The side wall of separation tank 1 has an overflow outlet 4 located between the slurry inlet 2 and the discharge outlet 3. The discharge assembly includes a rotating shaft 5 vertically rotatably connected inside the separation tank 1, and a pushing member 6 that cooperates with the discharge port 3 on the rotating shaft 5; the rotating shaft 5 is rotatably connected to the upper end of the separation tank 1 through a bearing assembly (such as a mechanical seal bearing); The power blade 7 is mounted on the rotating shaft 5 and located in the slurry flow channel. It is used to receive the impact kinetic energy of the slurry and drive the rotating shaft 5 to rotate.

[0022] The power blade 7 is installed inside the separation tank 1, and its position corresponds to the slurry inflow direction of the slurry inlet 2, so as to directly receive the slurry impact.

[0023] The flow rate at slurry inlet 2 is greater than the flow rate at outlet 3. Since the total amount of slurry injected through the inlet exceeds the amount that outlet 3 can discharge, the excess slurry will naturally push the liquid level inside the separation tank 1 upwards. When the liquid level rises to the overflow port 4 on the side wall, the supernatant rich in fine particles automatically and continuously overflows from the overflow port 4. In this way, large particles are discharged through the bottom outlet (accompanied by a small amount of slurry), while most of the slurry (containing the supernatant with small particles) is discharged through the large overflow port on the side wall.

[0024] In this application, although the rotation of the pusher 6 will have a certain stirring effect on the fluid in the tank, the settling velocity of large particles (whose particle size is generally above 0.3 mm) is large enough to overcome the local turbulent upward velocity generated by the pusher 6, thus effectively overcoming the stirring disturbance and settling to the bottom of the tank. Meanwhile, fine and light particles are more easily caught by the turbulence and rise with the liquid flow to be discharged from the overflow port 4, thereby reliably separating and removing large solid particles from the slurry.

[0025] The slurry inlet 2 is located on one side of the separation tank 1, and the overflow port 4 is located on the other side of the separation tank 1. The separation tank 1 is equipped with a baffle plate 10 located between the slurry inlet 2 and the overflow port 4. The upper end of the baffle plate 10 is higher than the height of the overflow port 4.

[0026] Preferably, the height of the slurry inlet 2 is 35cm below the top of the separation tank 1, and it is a circular opening with a diameter of 20cm; the height of the overflow outlet 4 is 80cm below the top of the tank, and it is a circular opening with a diameter of 30cm; the height of the baffle plate 10 is 70cm below the top of the tank, and the width of the baffle plate 10 is 1.5m.

[0027] The bottom of the separation tank 1 is equipped with a high-pressure backwasher 11, with the nozzle of the high-pressure backwasher 11 facing the outlet 3. The high-pressure backwasher 11 is supplied with high-pressure liquid, preferably a substance with a low specific gravity that does not chemically react with the solid-liquid mixture, such as high-pressure fresh water or brine.

[0028] Although the high-pressure liquid introduced by the high-pressure backflushing device 11 will dilute the slurry locally during the backflushing process, this dilution will not adversely affect the final slurry concentration injected into the underground cavity. This is because the well filling process itself includes a slurry concentration adjustment step, which is located after the separation process and before the slurry is pumped into the well injection equipment. The amount of liquid introduced by the high-pressure backflushing device is already within the design capacity of the subsequent concentration adjustment system, and the selected liquid (fresh water or brine) is physicochemically compatible with the slurry components, does not damage stability or introduce interfering impurities, and ensures that the injected slurry always reaches the preset target after adjustment.

[0029] The upward hydrodynamic force generated by the high-pressure jet, combined with the inherent buoyancy of the slurry, creates a combined force sufficient to overcome the gravity of smaller solid particles, thus suspending and lifting them. These small particles are then discharged from overflow port 4 with the overflow. However, for larger solid particles with higher particle size and density, this combined force cannot overcome their gravity, causing them to continue settling and accumulating at the bottom of the container before being discharged from outlet 3. Simultaneously, the high-pressure jet effectively impacts and breaks down bridging structures or blockage points formed near outlet 3 within the settled particle layer, ensuring unobstructed flow at the outlet and further preventing blockages.

[0030] Preferably, the power blades are flat impact blades, with eight power blades 7, the angle between adjacent blades being 45°, and the blade length being 0.8m and the width being 0.3m. Their installation position is directly opposite the jet direction of the slurry inlet 2, ensuring that the slurry directly impacts the blades.

[0031] The driving component 6 is a helical blade or a propeller blade. The helical blade is a continuous spiral ribbon, with its outer diameter slightly smaller than the diameter of the outlet 3 (e.g., 5-10% smaller) to ensure an effective clearance fit with the inner wall of the outlet 3. When the shaft 5 rotates, the helical blade rotates synchronously, and its helical channels generate continuous axial thrust and circumferential shear force. This forces large particles at the bottom of the barrel downwards axially to the outlet 3, and the rotating blade edges and helical surfaces continuously agitate and loosen the bottom particle layer, effectively breaking down the bridging structure formed by the compression between particles and any possible jamming with the edge of the outlet 3, preventing channel blockage. The propeller blade consists of 2-4 blades. When the shaft 5 rotates, the propeller blade generates axial flow. The inclined blade surface converts rotational kinetic energy into fluid power pointing towards the outlet 3 and thrust acting directly on the particles, pushing the bottom particles towards the outlet 3. At the same time, the local turbulence generated by the blade rotation also helps to break up particle agglomerates.

[0032] Preferably, the pusher 6 is a spiral blade, which has high conveying efficiency and is not prone to jamming.

[0033] A protective sleeve 12 is fitted onto the rotating shaft 5 above the pushing component 6. The protective sleeve 12 is fixed inside the separation tank 1 by a bracket. The separation tank 1 is fixed to the foundation by the bracket. The upper part of the separation tank 1 is a cylinder or prism, and the lower part is a frustum, frustum, or hemisphere. Preferably, the upper part of the separation tank 1 is a cylinder with a diameter of 2 meters and a height of 3 meters, and the lower part of the separation tank 1 is a hemisphere with a radius of 1 meter. Example

[0034] Combination Figure 2 It can be seen that the structure of this embodiment is roughly the same as that of Embodiment 1, the difference being: The slurry inlet 2 is connected to the feed pipe 8. The feed pipe 8 is provided with a blade chamber section 9 located above the separation tank 1. The upper end of the rotating shaft 5 passes through the blade chamber section 9 and is coaxially rotatably connected to it through a bearing assembly (such as a mechanical seal bearing). The power blade 7 is set inside the blade chamber section 9.

[0035] Compared to Example 1, this embodiment improves energy conversion efficiency by placing the power blade 7 inside the blade chamber section 9 of the feed pipe 8, so that the high-pressure slurry flow concentrates its impact on the power blade 7 before entering the separation tank 1. Example

[0036] This embodiment has a similar structure to Embodiment 1, except that: The separation tank 1 is equipped with a baffle plate 10 located between the slurry inlet 2 and the overflow port 4. The upper end of the baffle plate 10 is higher than the height of the overflow port 4. There are two baffle plates 10, which are located on both sides of the rotating shaft 5 (i.e., the rotating shaft 5 is located between the two baffle plates 10). The upper end of the baffle plate 10 is higher than the height of the overflow port 4.

[0037] The two sides of the baffle plates 10 are fixedly connected to the inner wall of the separation tank 1. The inner sides of the two baffle plates 10 (i.e. the side near the rotating shaft 5) are left with a gap (e.g. 1-3cm) to facilitate the rotation of the rotating shaft 5, which does not affect the rotation of the rotating shaft 5. The two baffle plates can more effectively prevent the slurry from being directly ejected at high speed towards the overflow port 4 when it is injected from the slurry inlet 2.

[0038] Optionally, the inner edges of the two baffles 10 are fixed to the outer wall of the protective sleeve 12 by welding or bolting to form a rigid support frame. The inner diameter of the protective sleeve 12 and the rotating shaft 5 are fitted with a clearance (fit clearance 0.5-5mm), which significantly improves the vibration resistance and deformation resistance of the baffles 10 and the overall structural stability while ensuring the free rotation of the rotating shaft 5.

[0039] The working principle of the automatic force-driven rotary solid-liquid separation device provided by the utility model is as follows: In operation, the slurry is injected into the separation tank 1 through the slurry inlet 2, and the impact drive blades 7 drive the rotating shaft 5 to rotate. Within the tank, the slurry settles due to gravity, with larger particles settling to the bottom. The slurry is then guided by the baffle plate 10 and discharged from the overflow port 3. Simultaneously, the rotating shaft 5 drives the pushing component 6 (such as a spiral blade) to rotate continuously, pushing the bottom particles towards the discharge port 3 and preventing blockage. The entire process is driven entirely by the kinetic energy of the slurry itself, achieving continuous separation and stable discharge of large particles.

[0040] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," 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 utility model 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 utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An automatic force-driven rotary solid-liquid separation device, characterized in that, include: The separation tank (1) has a slurry inlet (2) at the top and a discharge outlet (3) at the bottom. The flow rate of the slurry inlet (2) is greater than the flow rate of the discharge outlet (3). The side wall of the separation tank (1) has an overflow outlet (4) located between the slurry inlet (2) and the discharge outlet (3). The discharge assembly includes a rotating shaft (5) that is vertically rotatably connected inside the separation tank (1), and the rotating shaft (5) is provided with a pusher (6) that cooperates with the discharge port (3). The power blade (7) is mounted on the rotating shaft (5) and located in the slurry flow channel, and is used to receive the impact kinetic energy of the slurry and drive the rotating shaft (5) to rotate.

2. The automatic force-driven rotary solid-liquid separation device according to claim 1, characterized in that: The power blade (7) is disposed inside the separation tank (1), and its position corresponds to the slurry inflow direction of the slurry inlet (2) so as to directly receive the slurry impact.

3. The automatic force-driven rotary solid-liquid separation device according to claim 1, characterized in that: The slurry inlet (2) is connected to the feed pipe (8), and the feed pipe (8) is provided with a blade chamber section (9) located above the separation tank (1). The upper end of the rotating shaft (5) passes through the blade chamber section (9) and is coaxially connected to it. The power blade (7) is arranged in the blade chamber section (9).

4. An automatic force-driven rotary solid-liquid separation device according to claim 2 or 3, characterized in that: The slurry inlet (2) is located on one side of the separation tank (1), and the overflow port (4) is located on the other side of the separation tank (1). The separation tank (1) is provided with a baffle plate (10) located between the slurry inlet (2) and the overflow port (4). The upper end of the baffle plate (10) is higher than the height of the overflow port (4).

5. The automatic force-driven rotary solid-liquid separation device according to claim 1, characterized in that: The bottom of the separation tank (1) is provided with a high-pressure backwasher (11), and the nozzle of the high-pressure backwasher (11) faces the outlet (3).

6. The automatic force-driven rotary solid-liquid separation device according to claim 1, characterized in that: The pusher (6) is a spiral blade or a propulsion blade.

7. The automatic force-driven rotary solid-liquid separation device according to claim 1, characterized in that: A protective sleeve (12) is fitted on the rotating shaft (5) above the pusher (6), and the protective sleeve (12) is fixed inside the separation barrel (1) by a bracket.

8. An automatic force-driven rotary solid-liquid separation device according to claim 1, characterized in that: The upper part of the separation barrel (1) is a cylinder or prism, and the lower part is a frustum, prism or hemisphere.

Images