Mud separation equipment and method with feeding and exhausting functions

Abstract

The present invention discloses a mud separation device and method with feeding and exhausting functions, including a frame and a cyclone fixedly mounted on the frame, a mud box fixedly mounted on the frame, an inlet on the top of the mud box, a secondary vibrating screen and a primary vibrating screen sequentially mounted on the inner side of the frame from top to bottom, wherein the inlet on the top of the mud box is located below the primary vibrating screen, the sewage outlet of the cyclone is located above the secondary vibrating screen, and a vibrating grid is arranged inside the mud box. The present invention adopts a vibration mode to accelerate the discharge of gas in the mud, avoids gas enveloping solid particles in the suspended liquid when the mud is separated by the cyclone, ensures the centrifugal separation effect of the cyclone on the mud, so as to achieve the purpose of quickly and effectively separating water and mud blocks, reduce damage to the cyclone, and improve the service life of the mud separation equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of sludge treatment, and more particularly to a sludge separation device and method with feeding and exhausting functions. Background Art

[0002] Pile driving is often required in engineering construction. The removal of soil from wet soil mostly adopts the principle of air lift reverse circulation or an external pump to output the mud in the pit, and then the sludge is precipitated for a long time in the sedimentation tank. This is not only time-consuming but also occupies a large space. Therefore, mud separation equipment is often used for separation and purification to reduce or avoid the negative impact of mud on soil or water bodies and reduce environmental pollution. Air lift reverse circulation requires an air compressor to mix gas and mud to form an anti-upwelling flow.

[0003] The working process of gas lift reverse circulation will cause a large amount of gas to mix with the mud, which also causes the mud input into the cyclone to contain a large amount of gas. If the gas is not completely discharged, the crushed stone particles will be wrapped by gas when entering the high-speed running structure of the cyclone or when being transported in the pipeline. When contacting the inner wall, there is no liquid lubrication, which will increase the wear and seriously reduce the service life of the equipment. In addition, there are the following problems:

[0004] Separation efficiency: Gas will affect the separation effect of solid and liquid phases in mud. During the separation process, the presence of gas may cause the solid particles and liquid components to mix and stir, thereby affecting the separation efficiency of separation equipment (such as centrifuges, filters, etc.) for solid particles;

[0005] Vortex effect: Gas injection into mud may cause a vortex effect, causing solid particles in the mud to suspend in the liquid, reducing the efficiency of centrifugal separation. Summary of the invention

[0006] In view of the problems existing in the prior art, the object of the present invention is to provide a mud separation device and method with feeding and exhausting functions to solve the background technical problems.

[0007] To achieve the above object, the present invention adopts the following technical solution:

[0008] A mud separation device with feeding and exhausting functions, comprising a frame and a cyclone fixedly mounted on the frame, a mud box fixedly mounted on the frame, an inlet on the top of the mud box, a secondary vibrating screen and a primary vibrating screen sequentially mounted on the inner side of the frame from top to bottom, wherein the inlet on the top of the mud box is located below the primary vibrating screen, the sewage outlet of the cyclone is located above the secondary vibrating screen, a vibrating grid is arranged inside the mud box, a mud pump fixedly mounted on the frame, wherein the mud pump is connected to the tangential inlet of the mud box and the cyclone respectively through pipelines, a linkage rod is hinged at the bottom of the primary vibrating screen, and the bottom end of the linkage rod is hinged to the vibrating grid;

[0009] The vibration grid is box-shaped and is composed of multiple hollow steel pipes welded together. The connection between the mud box and the mud pump pipeline is located in the middle of the vibration grid, and one end of the pipeline connected to the mud box is inclined downward. Scraping strips arranged at equal distances are fixedly installed on the bottom of the vibration grid, and the bottom of the scraping strips fits the inner bottom wall of the mud box.

[0010] As a further description of the above technical solution:

[0011] The cross-sectional shape of the hollow steel pipe is elliptical, the horizontal direction of the hollow steel pipe is the long diameter, and the vertical direction is the short diameter. The outer surface of the hollow steel pipe is compounded with a diamond-like carbon film, and the surface of the diamond-like carbon film is treated with plasma to introduce polar functional groups on the surface of the diamond-like carbon film.

[0012] As a further description of the above technical solution:

[0013] A guide plate located between the primary vibrating screen and the mud box is fixedly mounted on the frame, the guide plate is inclined toward one side of the top entrance of the mud box, and evenly distributed arc-shaped protrusions are integrally formed on the guide plate, and the height of the arc-shaped protrusions is 0.5mm-1.5mm.

[0014] As a further description of the above technical solution:

[0015] The top of the linkage rod is hinged to the primary vibrating screen, and the linkage rod is tilted at an angle of 60 to 80 degrees. The mud box is provided with four strip through holes, and the linkage rod is inserted through the inner side of the strip through holes. The filtering aperture of the secondary vibrating screen is smaller than the filtering aperture of the primary vibrating screen.

[0016] As a further description of the above technical solution, the present invention also adopts the following method:

[0017] A separation method of a slurry separation device with feeding and exhausting functions, comprising the following separation steps:

[0018] Step 1: The mud is lifted upward from the pile well by the air lift reverse circulation device and introduced into the mud inlet pipe of the separation equipment. The mud first falls onto the primary vibrating screen, and the large mud blocks in the mud are filtered through the primary vibrating screen;

[0019] Step 2: The mud after preliminary filtration falls into the mud box. Since the primary vibrating screen and the secondary vibrating screen are driven to vibrate by two vibrating motors, the vibration is transmitted to the vibrating grid in the mud box through the linkage rod, vibrating the mud in the mud box and discharging the gas in the mud.

[0020] Step 3: The mud pump pumps the mud in the mud box through the pipeline to the cyclone, and the solid-liquid two-phase separation is carried out through the cyclone. The separated water is discharged through the overflow port of the cyclone to complete the water treatment in the sludge. The separated mud with less water content falls onto the secondary vibrating screen to further filter the water, and is discharged from the left side of the primary vibrating screen and the secondary vibrating screen.

[0021] Compared with the prior art, the advantages of the present invention are:

[0022] (1) This scheme uses vibration to accelerate the discharge of gas in the mud, so as to avoid the gas enveloping solid particles in the suspended liquid when the mud is separated by the cyclone, thereby ensuring the centrifugal separation effect of the cyclone on the mud, so as to achieve the purpose of quickly and effectively separating water and mud blocks, reduce damage to the cyclone, and increase the service life of the mud separation equipment.

[0023] (2) This solution utilizes the power of the vibration motor used by the primary vibrating screen and the secondary vibrating screen to indirectly drive the vibrating grid to regularly reciprocate in a small range, making full use of the vibration power, saving energy and protecting the environment, and assisting the discharge of gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 It is a schematic diagram of the positions of the primary vibrating screen, the secondary vibrating screen and the guide plate of the present invention;

[0026] Figure 3 It is a schematic diagram of the structure of the mud box of the present invention;

[0027] Figure 4 It is a schematic cross-sectional structural diagram of the mud box of the present invention.

[0028] Description of the numbers in the figure:

[0029] 1. Frame; 2. Cyclone; 3. Mud box; 31. Strip through hole; 4. Primary vibrating screen; 5. Secondary vibrating screen; 6. Vibrating grid; 61. Hollow steel pipe; 62. Scraper bar; 7. Mud pump; 8. Linkage rod; 9. Guide plate. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0031] See also Figure 1-4 , the present invention provides embodiment 1:

[0032] A mud separation device with feeding and exhausting functions comprises a frame 1 and a cyclone 2 fixedly mounted on the frame 1, a mud box 3 fixedly mounted on the frame 1, the mud box 3 having an inlet at the top, a secondary vibrating screen 5 and a primary vibrating screen 4 sequentially mounted on the inner side of the frame 1 from top to bottom, wherein the inlet at the top of the mud box 3 is located below the primary vibrating screen 4, the sewage outlet of the cyclone 2 is located above the secondary vibrating screen 5, a vibrating grid 6 is arranged inside the mud box 3, a mud pump 7 fixedly mounted on the frame 1, wherein the mud pump 7 is respectively connected to the tangential inlet of the mud box 3 and the cyclone 2 through pipelines, a linkage rod 8 is hinged at the bottom of the primary vibrating screen 4, and the bottom end of the linkage rod 8 is hinged to the vibrating grid 6; the vibrating grid 6 is a box-shaped design, the vibrating grid 6 is composed of a plurality of hollow steel pipes 61 welded to each other, the connecting point between the mud box 3 and the mud pump 7 pipeline is located in the middle of the vibrating grid 6, and one end of the pipeline connected to the mud box 3 is inclined downward (see Figure 1 and Figure 2 ), this inclined setting can to a certain extent prevent the rising gas in the mud from entering the mud pump along the pipeline, thereby improving the efficiency of gas discharge.

[0033] The vibration grid 6 in the mud box 3 is driven to vibrate back and forth by the linkage rod 8, so that the mud in the mud box 3 is always in an active state due to the vibration. The vibration reduces the binding effect of the viscosity and cohesion of the mud on the bubbles, which facilitates the movement of the bubbles. From a microscopic perspective, the internal particle structure of the mud will change during the vibration process, and the solid particles in the mud will be rearranged under the vibration. The effective viscosity of the mud will be temporarily reduced during the rearrangement process. The particles that were originally tightly arranged and restrained from each other will become relatively loose under the vibration, so that the obstruction of the mud to the movement of the bubbles is reduced. After the gas in the mud is discharged, it is introduced into the mud separation cyclone 2 to avoid the bubbles from affecting the separation effect of the solid-liquid phase in the mud. During the separation process, the presence of excessive gas is prevented from causing the solid particles and liquid components to mix and stir, thereby affecting the separation efficiency of the solid particles; gas is prevented from encapsulating the solid particles in the suspended liquid, ensuring the centrifugal separation effect of the cyclone 2 on the mud, so as to achieve the purpose of quickly and effectively separating water and mud blocks, reduce damage to the cyclone 2, and increase the service life of the mud separation equipment.

[0034] The cross-sectional shape of the hollow steel pipe 61 is elliptical, and the horizontal direction of the hollow steel pipe 61 is the long diameter, and the vertical direction is the short diameter.

[0035] Vibration will cause small bubbles in the mud to approach each other and aggregate. According to Bernoulli's principle, in the fluid, specifically the mud in the separation equipment, the pressure is low where the flow rate is fast, and the pressure is high where the flow rate is slow. The vibration of the elliptical hollow steel pipe 61 will cause the local flow change of the mud to prompt the small bubbles to move to the lower pressure area and gather together, thereby accelerating the aggregation and merging of small bubbles. The larger bubbles are subject to relatively greater buoyancy and are more likely to overcome the resistance of the mud and rise to the mud surface for discharge.

[0036] The outer surface of the hollow steel tube 61 is compounded with a diamond-like carbon film, and the surface of the diamond-like carbon film is treated by plasma to introduce polar functional groups into the surface of the diamond-like carbon film.

[0037] The hydrophilicity of the diamond-like carbon film can be improved by treating the surface with plasma treatment technology. Polar functional groups are introduced into the surface of the diamond-like carbon film. These polar functional groups refer to -OH, -COOH, etc. The functional groups can form hydrogen bonds and other interactions with water molecules, so that water has good wettability on the surface of the DLC film, showing hydrophilicity, and thus can inhibit bubbles from adhering to the hollow steel pipe 61 to a certain extent and affecting the discharge of bubbles.

[0038] The filter pore size of the secondary vibrating screen 5 is smaller than the filter pore size of the primary vibrating screen 4 .

[0039] See also Figure 1-4 , the present invention further provides Example 2 based on Example 1:

[0040] A guide plate 9 is fixedly mounted on the frame 1 and is located between the primary vibrating screen 4 and the mud box 3. The guide plate 9 is inclined toward one side of the top entrance of the mud box 3. The guide plate 9 is integrally formed with evenly distributed arc-shaped protrusions, and the height of the arc-shaped protrusions is 0.5mm-1.5mm.

[0041] When the mud falls downward from the primary vibrating screen 4, the guide plate 9 can reduce the linear falling height, thereby reducing the impact of the falling mud on the mud inside the mud box 3, thereby avoiding secondary mixing of gas and mud, and ensuring the gas discharge and separation effect. In the process of mud flowing on the guide plate 9, the mud is affected by the arc-shaped protrusions and gathers and separates from each other many times, which can facilitate the aggregation and merging of bubbles in the mud, thereby facilitating the discharge of bubbles by their own buoyancy.

[0042] The bottom of the vibration grid 6 is fixedly mounted with scraper strips 62 arranged at equal distances, and the bottom of the scraper strips 62 is in contact with the inner bottom wall of the mud box 3 .

[0043] During the vibration of the vibrating grid 6, the scraper bar 62 at the bottom will be synchronously driven to move relative to the mud box 3 to prevent the mud from settling inside the mud box 3, further making the mud active and facilitating mud mixing, which is beneficial to the efficient separation of the mud by the cyclone 2.

[0044] The top of the linkage rod 8 is hinged to the primary vibrating screen 4, and the linkage rod 8 is tilted, with an inclination angle of 60 degrees to 80 degrees.

[0045] The inclined linkage rod 8 ensures that its length is greater than the height of the primary vibrating screen 4 from the vibrating grille 6, and the linkage rod 8 is hingedly connected to both. During the vibration of the primary vibrating screen 4, the up and down vibrations and horizontal lateral vibrations of the primary vibrating screen 4 are converted into horizontal lateral vibrations of the vibrating grille 6, thereby ensuring the stability of the vibration of the vibrating grille 6.

[0046] The mud box 3 is provided with four strip-shaped through holes 31 , and the linkage rod 8 is inserted into the inner side of the strip-shaped through holes 31 .

[0047] The four strip-shaped through holes 31 facilitate the change of the tilt angle of the linkage rod 8 during the vibration process, and the structure is scientific and reasonable.

[0048] See also Figure 1-4 Based on Examples 1 and 2, the present invention further provides Example 3:

[0049] A separation method of a slurry separation device with feeding and exhausting functions, comprising the following separation steps:

[0050] Step 1: The mud is lifted upward from the pile well by the air lift reverse circulation device and introduced into the mud inlet pipe of the separation equipment. The mud first falls onto the primary vibrating screen 4, and the large mud blocks in the mud are filtered through the primary vibrating screen 4.

[0051] Step 2: The mud after preliminary filtration falls into the mud box 3. Since the primary vibrating screen 4 and the secondary vibrating screen 5 are driven to vibrate by two vibrating motors, the vibration is transmitted to the vibrating grid 6 in the mud box 3 through the linkage rod 8, thereby vibrating the mud in the mud box 3 and discharging the gas in the mud.

[0052] Step 3: The mud pump 7 pumps the mud in the mud box 3 through the pipeline to the cyclone 2, and the solid-liquid two-phase separation is carried out through the cyclone 2, wherein the separated water is discharged through the overflow port of the cyclone 2, and the water treatment in the sludge is completed. The separated mud with less water content falls onto the secondary vibrating screen 5 to further filter the water, and is discharged from the left side of the primary vibrating screen 4 and the secondary vibrating screen 5.

[0053] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A slurry separation device with feeding and exhausting functions, comprising a frame (1) and a cyclone (2) fixedly mounted on the frame (1), characterized in that: A mud box (3) is fixedly mounted on the frame (1), wherein the top of the mud box (3) has an inlet, and a secondary vibrating screen (5) and a primary vibrating screen (4) are sequentially mounted on the inner side of the frame (1) from top to bottom, wherein the inlet on the top of the mud box (3) is located below the primary vibrating screen (4), and the sewage outlet of the cyclone (2) is located above the secondary vibrating screen (5). A vibrating grille (6) is arranged inside the mud box (3), and a mud pump (7) is fixedly mounted on the frame (1), wherein the mud pump (7) is connected to the tangential inlets of the mud box (3) and the cyclone (2) through pipelines, respectively. A linkage rod (8) is hingedly mounted at the bottom of the primary vibrating screen (4), and the bottom end of the linkage rod (8) is hingedly mounted to the vibrating grille (6); The vibration grid (6) is of box-shaped design, and is composed of a plurality of hollow steel pipes (61) welded together. The connection point between the mud box (3) and the mud pump (7) pipeline is located in the middle of the vibration grid (6), and one end of the pipeline connected to the mud box (3) is inclined downward. The cross-sectional shape of the hollow steel pipe (61) is elliptical, the horizontal direction of the hollow steel pipe (61) is a long diameter, and the vertical direction is a short diameter; A guide plate (9) is fixedly mounted on the frame (1) and is located between the primary vibrating screen (4) and the mud box (3). The guide plate (9) is inclined toward one side of the top entrance of the mud box (3). The guide plate (9) is integrally formed with evenly distributed arc-shaped protrusions, and the height of the arc-shaped protrusions is 0.5 mm to 1.5 mm. The top of the linkage rod (8) is hinged to the primary vibrating screen (4), and the linkage rod (8) is tilted at an angle of 60 to 80 degrees; The outer surface of the hollow steel tube (61) is composited with a diamond-like carbon film, and the surface of the diamond-like carbon film is treated with plasma to introduce polar functional groups on the surface of the diamond-like carbon film; Scraping strips (62) arranged at equal distances are fixedly mounted on the bottom of the vibration grid (6), and the bottoms of the scraping strips (62) are in contact with the inner bottom wall of the mud box (3).

2. The slurry separation equipment with feeding and exhausting function according to claim 1 is characterized in that: The mud box (3) is provided with four strip-shaped through holes (31), and the linkage rod (8) is inserted into the inner side of the strip-shaped through holes (31).

3. The mud separation equipment with feeding and exhausting function according to claim 1 is characterized in that: The filtering aperture of the secondary vibrating screen (5) is smaller than the filtering aperture of the primary vibrating screen (4).

4. A separation method applied to the mud separation equipment with feeding and exhausting function as claimed in any one of claims 1 to 3, characterized in that: The separation steps include: Step 1: The mud is lifted upward from the pile well by an air lift reverse circulation device and introduced into the mud inlet pipe of the separation device. The mud first falls onto the primary vibrating screen (4), and large mud lumps in the mud are filtered by the primary vibrating screen (4); Step 2: The mud after preliminary filtration falls into the mud box (3). Since the primary vibrating screen (4) and the secondary vibrating screen (5) are driven to vibrate by two vibrating motors, the vibration is transmitted to the vibrating grid (6) in the mud box (3) through the linkage rod (8), thereby vibrating the mud in the mud box (3) and discharging the gas in the mud; Step 3: The mud in the mud box (3) is pumped into the cyclone (2) through the pipeline by the mud pump (7), and the solid-liquid two-phase separation is carried out through the cyclone (2), wherein the separated water is discharged through the overflow port of the cyclone, thereby completing the water treatment in the sludge. The separated mud with less water content falls onto the secondary vibrating screen (5) to further filter the water, and is discharged from the left side of the primary vibrating screen (4) and the secondary vibrating screen (5).

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