A device for rapid evaluation of flocculation and sedimentation performance of coal slurry

Abstract

The present invention provides a device for rapidly evaluating the flocculation and settling performance of coal slurry water. The device comprises a settling shell, wherein multiple stages of vortex flocculation structures are sequentially arranged from bottom to top within the settling shell. Adjacent stages of the vortex flocculation structures are spaced apart, and each stage of the vortex flocculation structures comprises multiple triangular prism-shaped flow spoilers. Each triangular prism-shaped flow spoiler has two triangular faces connected to the inner wall of the settling shell. The triangular faces of each triangular prism-shaped flow spoiler in each stage of the vortex flocculation structure are of the same height, and the heights of the multiple triangular faces in each stage of the vortex flocculation structure increase from bottom to top. The multiple triangular prism-shaped flow spoilers in each stage of the vortex flocculation structure are arranged in multiple rows, with the vertical center axes of the multiple triangular prism-shaped flow spoilers in the same row coinciding, and the multiple triangular prism-shaped flow spoilers in each row are arranged in the same direction. The device can rapidly flocculate and settle coal slurry water and can be used for feedback control of coal slurry water dosing.

Description

Technical Field

[0001] The invention relates to the technical field of coal sludge water flocculation and sedimentation, in particular to a device for quickly evaluating the flocculation and sedimentation performance of coal sludge water. Background Art

[0002] Coal slime flocculation and sedimentation is the primary treatment process for the slime produced during wet coal washing. The efficiency of this process depends primarily on the type and dosage of the added reagents. Insufficient addition results in poor floc formation, low sedimentation efficiency, and high turbidity in the overflow circulating water, impacting upstream washing processes. Excessive addition increases the viscosity of the settled slime and overflow water, affecting both downstream filtration and upstream washing processes. Therefore, determining the optimal addition amount and conducting follow-up adjustments are prerequisites for ensuring optimal flocculation and sedimentation performance.

[0003] The optimal dosage is primarily influenced by the concentration of the coal slurry and its mineral composition, but currently there is no reliable equipment for online measurement of the mineral composition of coal slurry. The mainstream approach uses feedforward measurement of coal slurry concentration and flow rate, and feedback measurement of the thickener's sedimentation interface and overflow turbidity to comprehensively adjust the dosage. This approach fails to reflect changes in coal quality, and existing interface meters are unable to accurately measure changes in the sedimentation interface. By the time overflow turbidity begins to rise, the thickener's sedimentation state has deviated from the ideal state, typically requiring 1 to 2 hours or longer to adjust back to normal, resulting in significant lag. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a rapid evaluation device for the flocculation and sedimentation performance of coal slurry water. The rapid evaluation device for the flocculation and sedimentation performance of coal slurry water provided by the present invention is based on the flocculation dynamics principle that the vortex scale determines the flocculation effect and the quantitative relationship obtained through research results. The size of the turbulent is determined based on the diameter of the flocculated particles. The device can quickly flocculate and sediment coal slurry water and evaluate its flocculation and sedimentation performance under certain dosing conditions. The obtained sedimentation performance is used as the basis for adjusting the dosage, avoiding the detection of coal slurry water properties, saving the instrument investment of the intelligent dosing system, simplifying the control system, and at the same time, because it does not rely on coal slurry property detection and concentrator overflow turbidity detection, it can adapt to complex and changeable coal quality conditions and avoid the hysteresis of feedback adjustment, and is more adaptable and reliable.

[0005] To solve the above technical problems, the present invention provides a solution to quickly evaluate the flocculation and sedimentation performance of coal slurry water, comprising a sedimentation shell provided with a water inlet pipe for conveying coal slurry water containing flocculant, and further comprising:

[0006] A multi-stage vortex flocculation structure, wherein the multi-stage vortex flocculation structure is sequentially arranged in the sedimentation shell from bottom to top, and there is a gap between two adjacent stages of the vortex flocculation structure, and each stage of the vortex flocculation structure includes a plurality of triangular prism-type spoilers, each triangular prism-type spoiler has two triangular faces, and the two triangular faces are respectively connected to the inner wall of the sedimentation shell, and the height of the triangular faces of each triangular prism-type spoiler in each stage of the vortex flocculation structure is the same, and the heights of the multiple triangular faces in each stage of the vortex flocculation structure sequentially arranged from bottom to top increase in sequence, wherein the triangular face height h1 of the triangular prism-type spoiler in the vortex flocculation structure at the bottommost level of the sedimentation shell is calculated by the average particle size d of the coal slime raw material, and the calculation formula is: h1 = (10d-0.046) / 0.0067. The triangular face height h1 of each triangular prism-type spoiler in the vortex flocculation structure at the topmost level of the sedimentation shell is n , h n Less than or equal to 15cm. The triangular surface height h of each triangular prism-shaped spoiler in the intermediate vortex flocculation structure x , where x is any natural number between 2 and 6, h x Through h1 and h n Calculated, the calculation formula is: h x =h1+(h n -h1) / (n-1)*(x-1).

[0007] The multiple triangular prism-shaped spoilers in each stage of the vortex flocculation structure are divided into multiple rows, the vertical central axes of the multiple triangular prism-shaped spoilers in the same column coincide, and the arrangement direction of the multiple triangular prism-shaped spoilers in each row is consistent.

[0008] Preferably, the three angles of the triangular face of the triangular prism-shaped spoiler are: a base angle of 25° to 35°, a vertex angle of 15° to 20°, and an obtuse angle of 125° to 140°.

[0009] Preferably, the three angles of the triangular face of the triangular prism-shaped spoiler are: a base angle of 30°, a vertex angle of 15° and an obtuse angle of 135°.

[0010] Preferably, the center distance between two adjacent triangular prism-shaped spoilers in the same row in each stage of the vortex flocculation structure is 0.518 times the height of the triangular prism-shaped spoilers in that stage.

[0011] Preferably, the vortex flocculation structure includes three levels of vortex flocculation structures arranged in the sedimentation shell from bottom to top, namely, a primary vortex flocculation structure, a secondary vortex flocculation structure and a tertiary vortex flocculation structure, and the triangular surface height of each triangular prism-type spoiler in the three-stage vortex flocculation structure is less than or equal to 15 cm.

[0012] Preferably, the spacing height between two adjacent vortex flocculation structures is the height of the triangular surface in the lower vortex flocculation structure between the two adjacent upper and lower stages.

[0013] Preferably, the overall height of each stage of flocculation structure is H, which is 30 cm to 40 cm. The number of rows of spoilers required for each stage is obtained by rounding the ratio of the vortex zone height to the spoiler height.

[0014] Preferably, a baffle is provided at the bottom of the sedimentation shell in the longitudinal direction, and the baffle separates the bottom of the sedimentation shell into a flocculation sedimentation area and a coal discharge channel. A plurality of triangular prism-type spoilers are arranged in the flocculation sedimentation area, and the top of the coal discharge channel is connected to the top of the vortex flocculation structure at the lowest level, and the bottom of the coal discharge channel is connected to the bottom of the sedimentation shell.

[0015] Preferably, an overflow outlet is provided on the top of the sedimentation shell, and a turbidity meter is provided in the overflow outlet for detecting the turbidity of the wastewater discharged from the overflow outlet.

[0016] Preferably, a water distribution pipe is provided in the sedimentation shell below the minimum-stage vortex flocculation structure in the horizontal direction, the water distribution pipe is connected to the water inlet pipe, and a plurality of water distribution holes are opened on the water distribution pipe.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The use of triangular prism-shaped spoilers of gradually increasing size causes vortices of gradually increasing size to form from top to bottom within the sedimentation shell. This vortex, consistent with the growth of flocs from small to large, significantly increases the probability of particle-floc collisions in the coal slurry, allowing fine particles to quickly adhere and grow into larger flocs. Furthermore, the triangular structure of the triangular prism spoilers allows large flocs to settle toward one side of the sedimentation shell, avoiding prolonged interference with the rising water flow that could break them up and ensure the stability of the flocculation and sedimentation process. This device can achieve flocculation, sedimentation, and separation of coal slurry within tens of seconds, enabling rapid evaluation of its sedimentation performance and enabling rapid feedback control of industrial coal slurry flocculation and sedimentation dosing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The present invention is a schematic structural diagram of a device for rapidly evaluating the flocculation and sedimentation performance of coal slurry water.

[0020] Figure 2 This is a schematic diagram of a triangular prism-type spoiler of a device for quickly evaluating the flocculation and sedimentation performance of coal slurry water according to the present invention.

[0021] Figure 3This is a schematic diagram of the contact between the triangular prism-type flow disturber and the peat of a device for rapid evaluation of flocculation and sedimentation performance of coal slurry water according to the present invention.

[0022] Figure 4 This is a diagram showing the arrangement of triangular prism-type spoilers in each row of the vortex flocculation structure at each level of the device for rapid evaluation of coal sludge water flocculation and sedimentation performance according to the present invention.

[0023] Figure 5 The present invention is a schematic diagram of the three-dimensional structure of a triangular prism-type spoiler of a device for rapid evaluation of coal slurry flocculation and sedimentation performance.

[0024] Description of reference numerals:

[0025] 1. Sedimentation shell, 2. First-stage vortex flocculation structure, 3. Second-stage vortex flocculation structure, 4. Third-stage vortex flocculation structure, 5. Triangular prism-type spoiler, 6. Funnel-shaped sedimentation cylinder, 7. Water inlet pipe, 8. Turbidimeter, 9. Coal slime outlet, 10. Coal discharge channel, 11. Overflow outlet. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0027] The inventors discovered that the flocculation process of coal slurry is affected by the fluid environment. When a suitable coagulation device is provided, large, dense flocs can be formed, significantly increasing the rate of flocculation and sedimentation. However, in existing industrial processes, flocculation and sedimentation of coal slurry water often involve dosing in pipelines and settling in concentrators without the use of a suitable flocculation device. The resulting flocs are small and uneven, and the settling process takes a long time. Therefore, the flocculation and sedimentation effect of the coal slurry water under the current dosing system cannot be quickly reflected. The dosing feedback control system also has significant hysteresis, hindering the timely adjustment of the dosage.

[0028] In light of this, the present invention, based on the flocculation dynamics principle that vortex size determines flocculation effect and the quantitative relationship obtained through research results, determines the size of the flow disturber based on the diameter of the flocculated particles. This allows for rapid flocculation and sedimentation of coal slurry and evaluates its flocculation and sedimentation performance under specific dosing conditions. Using the obtained sedimentation performance as the basis for adjusting the dosage, this system avoids the need to test the properties of the coal slurry, saves instrumentation investment in the intelligent dosing system, and simplifies the control system. Furthermore, since it does not rely on coal slurry property testing or concentrator overflow turbidity testing, it can adapt to complex and changing coal quality conditions and avoid the hysteresis of feedback control, making it more adaptable and reliable.

[0029] like Figures 1 to 4 As shown, the present invention provides a device for quickly evaluating the flocculation and sedimentation performance of coal slurry water, comprising a sedimentation shell 1, on which is provided a water inlet pipe 7 for conveying coal slurry water containing flocculant, and further comprising:

[0030] A multi-stage vortex flocculation structure, wherein the multi-stage vortex flocculation structure is sequentially arranged in the sedimentation shell 1 from bottom to top, and there is a gap between two adjacent vortex flocculation structures, and each stage of the vortex flocculation structure includes a plurality of triangular prism-type spoilers 5, each triangular prism-type spoiler 5 has two triangular faces, and the two triangular faces are respectively connected to the inner wall of the sedimentation shell 1, and the triangular faces of each triangular prism-type spoiler 5 in each stage of the vortex flocculation structure are the same in height, and the heights of the multiple triangular faces in the vortex flocculation structures of each stage arranged sequentially from bottom to top increase in sequence, wherein the triangular face height h1 of the triangular prism-type spoiler 5 in the vortex flocculation structure at the bottommost level of the sedimentation shell 1 is calculated according to the average particle size d of the coal slime raw material, and the calculation formula is: h1=(10d-0.046) / 0.0067; the triangular face height h1 of each triangular prism-type spoiler 5 in the vortex flocculation structure at the topmost level of the sedimentation shell 1 is n , h n Less than or equal to 15cm, the triangular surface height h of each triangular prism type spoiler 5 in the intermediate vortex flocculation structure x (x is any natural number between 2 and 6), h x Through h1 and h n Calculated, the calculation formula is: h x =h1+(h n -h1) / (n-1)*(x-1).

[0031] The multiple triangular prism-shaped spoilers 5 in each stage of the vortex flocculation structure are divided into multiple rows. The vertical central axes of the multiple triangular prism-shaped spoilers 5 in the same row coincide with each other, and the multiple triangular prism-shaped spoilers 5 in each row are arranged in the same direction.

[0032] When the coal slurry water fed into the sedimentation shell 1 from the bottom flows upward through the multi-stage vortex flocculation structure, a vortex is formed on the upper part of each triangular prism type spoiler 5 in each level of the vortex flocculation structure. The size of the vortex is proportional to the width of the triangular prism type spoiler 5, which is the distance between the two triangular faces of the triangular prism type spoiler 5 (e.g., Figure 5As shown, the specific proportional relationship between the size of the vortex and the width of the triangular prism-type flow spoiler 5 cannot be given, because the proportional relationship changes with the flow velocity of the fluid), thereby promoting the collision and adhesion of solid particles in the coal slurry water in this area. The coagulation dynamics theory points out that when the vortex scale is similar to the particle size, it can effectively promote collision and adhesion. As the flocs gradually increase from bottom to top, the heights of the multiple triangular faces in the vortex flocculation structures of each level arranged from bottom to top increase in sequence. The height h1 of the triangular face of the triangular prism-type flow spoiler 5 in the vortex flocculation structure at the bottom of the sedimentation shell 1 is calculated by the average particle size d of the coal slurry raw material, and the calculation formula is: h1 = (10d-0.046) / 0.0067; the height h1 of the triangular face of each triangular prism-type flow spoiler 5 in the vortex flocculation structure at the top of the sedimentation shell 1 is n , h n Less than or equal to 15cm, the triangular surface height h of each triangular prism type spoiler 5 in the intermediate vortex flocculation structure x (x is any natural number from 2 to 6), the height h of the intermediate level spoilers x Through h1 and h n Calculated, the calculation formula is: h x =h1+(h n -h1) / (n-1)*(x-1).

[0033] After the coal slime water flows through the multi-stage vortex flocculation structure from bottom to top in the sedimentation shell 1, small flocs gradually grow into large flocs. During the flocculation process, the flocs gradually grow and their settling velocity also gradually increases. When the settling velocity is greater than the speed at which the water flows upward, sedimentation will occur. Because the vertical central axes of the multiple triangular prism type spoilers 5 located in the same column overlap, the arrangement direction of the multiple triangular prism type spoilers 5 in each row is consistent, so the triangular prism type spoilers 5 of the adjacent two rows in the same-level vortex flocculation structure are staggered, and then the particles sedimented by the upper triangular prism type spoilers 5 can be deposited on the inclined plane of the triangular prism type spoilers 5 on the lower floor. Because the inclined plane inclination angle is large enough, under the action of gravity and inertia, some flocs will gradually move to the lower right under the guidance of the inclined plane, and settle to the bottom by the right side, reducing the fragmentation caused by the interference of the rising water.

[0034] Figure 2 Schematic diagram of a triangular prism type flow disruptor in a device for rapid evaluation of flocculation and sedimentation performance of coal slurry water. The triangular prism type flow disruptor in the schematic diagram may be a schematic diagram of each triangular prism type flow disruptor in a vortex flocculation structure at each level. When h is h1, Figure 2 The triangular prism type flow spoiler shown is a schematic diagram of the triangular prism type flow spoiler 5 in the vortex flocculation structure located at the bottom of the sedimentation shell 1. When h is h n hour, Figure 2The triangular prism type flow spoiler shown is a schematic diagram of each triangular prism type flow spoiler 5 in the vortex flocculation structure located at the top of the sedimentation shell 1. When h is h x， (x is any natural number between 2 and 6), Figure 2 The triangular prism-shaped flow spoiler shown is a schematic diagram of each triangular prism-shaped flow spoiler 5 located in each stage of the vortex flocculation structure in the middle of the sedimentation shell 1 .

[0035] In the sedimentation shell 1, as the triangular surface height of the triangular prism type spoiler 5 in each level of vortex flocculation structure gradually increases, the size of the flocs also increases. When the floc particle size is large enough to descend along the inclined surface of the triangular prism type spoiler 5, it will descend directly. When the floc particle size is not large enough to form particles that can settle with the vortex at the top of each triangular prism type spoiler 5 in this layer, the floc will continue to rise. Otherwise, it will form large flocs and settle at a triangular prism type spoiler 5 in any layer of the vortex flocculation structure of this level. If the secondary vortex flocculation structure 3 is unable to completely settle the flocs, a small number of flocs will be settled in the tertiary vortex flocculation structure 4. The sedimentation principle is consistent with the sedimentation principle of each triangular prism type spoiler 5 in the primary vortex flocculation structure 2 and the secondary vortex flocculation structure 3, and will not be repeated here.

[0036] Specifically, the three angles of the triangular face of the triangular prism type spoiler 5 are: a base angle of 25° to 35°, a vertex angle of 15° to 20°, and an obtuse angle of 125° to 140°. Preferably, the three angles of the triangular face of the triangular prism type spoiler 5 are: a base angle of 30°, a vertex angle of 15°, and an obtuse angle of 135°.

[0037] The structural design significance of the triangular prism spoiler 5 is as follows: Figures 3 and 4 As shown, when the coal slurry water flows from bottom to top through the triangular prism type spoiler 5, the design of the triangular prism type spoiler 5 can form a vortex zone on its upper part. In this way, when the coal slurry rises, the vortex can greatly increase the collision probability of the particles and flocs in the coal slurry water. The coal slurry water particles will collide and adhere to form flocs in this area, and the descending flocs will settle along the slope.

[0038] Specifically, the height of the interval between the upper and lower adjacent vortex flocculation structures is the height of the triangular surface in the lower vortex flocculation structure of the upper and lower adjacent stages. The purpose of this design is to make the water flow smoothly transition when flowing between stages.

[0039] Specifically, the center distance between two adjacent triangular prism-shaped spoilers 5 in the same row in each stage of the vortex flocculation structure is 0.518 times the height of the triangular face of the triangular prism-shaped spoiler 5 located in that stage. At this time, the coal slime settled from the inclined surface of the triangular prism-shaped spoiler 5 in the upper row can be taken over by the triangular prism-shaped spoiler 5 in the lower row, thereby achieving the purpose of gradually transporting the settled coal slime to the right.

[0040] Figure 4 This is a diagram showing the arrangement of triangular prism-type spoilers in each row of the vortex flocculation structure of a rapid evaluation device for flocculation and sedimentation performance of coal slurry water. When h is h1, Figure 4 It means that the center distance between two adjacent triangular prism type flow spoilers 5 in the same row in the vortex flocculation structure at the bottom of the sedimentation shell 1 is 0.518 times the height of the triangular face of the triangular prism type flow spoiler 5 at this level. n hour, Figure 4 It means that the center distance between two adjacent triangular prism type flow spoilers 5 in the same row in the vortex flocculation structure at the top of the sedimentation shell 1 is 0.518 times the height of the triangular face of the triangular prism type flow spoiler 5 at that level. x， (x is any natural number between 2 and 6), Figure 4 It means that the center distance between two adjacent triangular prism type spoilers 5 in the same row in each stage of the vortex flocculation structure located in the middle of the settling shell 1 is 0.518 times the height of the triangular face of the triangular prism type spoiler 5 located in the stage.

[0041] Specifically, the overall height of each flocculation structure is H, which is 30 cm to 40 cm. The number of rows of turbulators required for each stage is the integer ratio of the vortex zone height to the turbulator height. The height of each coagulation zone is roughly the same, so that the coal slurry has sufficient residence time in each flocculation zone without fragmentation.

[0042] Specifically, a baffle is provided longitudinally at the bottom of the sedimentation shell 1, which divides the bottom of the sedimentation shell 1 into a flocculation sedimentation zone and a coal discharge channel 10. A plurality of triangular prism-shaped flow disruptors 5 are provided in the flocculation sedimentation zone. The top of the coal discharge channel 10 is intermittently connected to the top of the lowest-level vortex flocculation structure, and the bottom of the coal discharge channel 10 is connected to the bottom of the sedimentation shell 1. The coal discharge channel 10 can collect most of the flocs settled from the vortex flocculation structures above the lowest-level vortex flocculation structure, preventing the flocs from being broken again after being retained.

[0043] Specifically, an overflow outlet 11 is provided on the top of the sedimentation shell 1. A turbidity meter 8 is provided in the overflow outlet 11. The turbidity meter 8 is used to detect the turbidity of the wastewater discharged from the overflow outlet 11, thereby determining the quality of the sedimentation performance.

[0044] Specifically, a funnel-shaped settling drum 6 is provided at the bottom of the settling shell 1 to collect settled peat. The enriched peat is discharged through a slime outlet 9, while clarified water overflows from the top and is discharged through an overflow outlet 11. A slime outlet 9 is provided at the bottom of the funnel-shaped settling drum 6, and a valve is provided on the slime outlet 9. The purpose of providing the funnel-shaped settling drum 6 at the bottom of the settling shell 1 is to quickly collect settled peat and allow it to be quickly discharged through the slime outlet 9. The valve can be either a manual valve or an electric valve, without limitation.

[0045] Specifically, a water distribution pipe is provided in the horizontal direction in the sedimentation shell 1 located below the minimum vortex flocculation structure. One end of the water distribution pipe is connected to the water inlet pipe 7, and the other end of the water distribution pipe is sealed. A plurality of water distribution holes are provided on the water distribution pipe, which is conducive to uniform water discharge from the water inlet pipe of the flocculant-containing coal sludge water.

[0046] Specifically, the water outlet directions of the multiple water distribution holes are perpendicular to the direction of the water distribution pipe, providing a uniform upward flow of water.

[0047] Example

[0048] like Figure 1 As shown, when the multi-stage vortex flocculation structure provided by the present invention has three levels, the vortex flocculation structure includes, from bottom to top, a primary vortex flocculation structure 2, a secondary vortex flocculation structure 3, and a tertiary vortex flocculation structure 4, which are sequentially arranged within the sedimentation shell 1. The triangular face height of each triangular prism-shaped spoiler 5 in the tertiary vortex flocculation structure 4 is required to be less than or equal to 15 cm. The triangular face height h1 of each triangular prism-shaped spoiler 5 in the primary vortex flocculation structure 2 is calculated by the formula h1 = (10d - 0.046) / 0.0067. The triangular face height h2 of each triangular prism-shaped spoiler 5 in the secondary vortex flocculation structure 3 is calculated by the formula h2 = h1 + (h3 - h1) / (3 - 1) * (2 - 1).

[0049] Then, two triangular faces of the multiple triangular prism-type spoilers 5 in each stage of the vortex flocculation structure are respectively connected to the inner wall of the sedimentation shell 1, wherein the triangular faces of each triangular prism-type spoiler 5 in each stage of the vortex flocculation structure have the same height. In addition, the multiple triangular prism-type spoilers 5 in each stage of the vortex flocculation structure are divided into multiple rows, the vertical central axes of the multiple triangular prism-type spoilers 5 in the same column coincide, and the arrangement direction of the multiple triangular prism-type spoilers 5 in each row is consistent.

[0050] When the coal slurry water is sent into the sedimentation shell 1 through the water inlet pipe 7, the coal slurry water containing flocculant will flow from bottom to top through the first-level vortex flocculation structure 2, the second-level vortex flocculation structure 3 and the third-level vortex flocculation structure 4, and then form a vortex on the upper part of the triangular prism type spoiler 5 in each level of the vortex flocculation structure, thereby promoting the collision and adhesion of solid particles in the coal slurry water in this area, wherein when the formed flocs meet the sedimentation conditions, they will descend along the inclined surface of the triangular prism type spoiler 5; when the formed flocs are loose and not dense and do not meet the sedimentation conditions, the flocs will not descend along the inclined surface of the triangular prism type spoiler 5 of this level, but will continue to rise to the vortex flocculation structure of the adjacent level and continue to settle at the triangular prism type spoiler 5 of this level. When the flocs rise to the third-level vortex flocculation structure 4, they will descend through the inclined surfaces of the triangular prism type spoilers 5 in the third-level vortex flocculation structure 4.

[0051] Because the triangular prism-shaped spoilers 5 in two adjacent rows of the same-level vortex flocculation structure are staggered, particles deposited by the upper triangular prism-shaped spoilers 5 are deposited on the inclined surface of the lower triangular prism-shaped spoilers 5. Due to the sufficiently large inclination angle of the inclined surface, some flocs are guided by the inclined surface to the lower right under the action of gravity and inertia. Furthermore, since the coal discharge channel 10 is provided within the sedimentation shell 1, the settled coal sludge flocs that fall from the secondary vortex flocculation structure 3 slide along the inclined surfaces of the multiple triangular prism-shaped spoilers 5 in the secondary vortex flocculation structure 3, gradually enriching in the coal discharge channel 10 and settling to the bottom. Compared with direct settling of flocs in the vortex zone, this design reduces the probability of floc breakage. The coal discharge channel 10 can collect most of the flocs settled by the secondary vortex flocculation structure 3 and the tertiary vortex flocculation structure 4. Furthermore, settling the flocs from the right side to the bottom can also reduce breakage caused by interference from rising water.

[0052] In addition, the distance between the primary vortex flocculation structure 2 and the secondary vortex flocculation structure 3 is the triangular surface height of the triangular prism type spoiler 5 in the primary vortex flocculation structure 2, and the distance between the secondary vortex flocculation structure 3 and the tertiary vortex flocculation structure 4 is the triangular surface height of the triangular prism type spoiler 5 in the secondary vortex flocculation structure 3.

[0053] Since the overall height of each flocculation structure is H, the triangular prism-shaped spoilers 5 in the primary vortex flocculation structure 2 are arranged in six rows. When the triangular face height of the triangular prism-shaped spoilers 5 in the primary vortex flocculation structure 2 is twice the triangular face height of the triangular prism-shaped spoilers 5 in the secondary vortex flocculation structure 3, the triangular prism-shaped spoilers 5 in the secondary vortex flocculation structure 3 are arranged in three rows. When the triangular face height of the triangular prism-shaped spoilers 5 in the primary vortex flocculation structure 2 is three times the triangular face height of the triangular prism-shaped spoilers 5 in the tertiary vortex flocculation structure 4, the triangular prism-shaped spoilers 5 in the tertiary vortex flocculation structure 4 are arranged in two rows. The heights of the three coagulation zones are essentially the same, which allows sufficient residence time for the coal slurry water in the three flocculation zones without causing fragmentation.

[0054] The water settled by the multiple triangular prism-type spoilers 5 in the primary vortex flocculation structure 2, the secondary vortex flocculation structure 3 and the tertiary vortex flocculation structure 4 rises to the top of the sedimentation shell 1 and flows out through the overflow outlet 11 provided on the top of the sedimentation shell 1. The outflowing water is tested by a turbidity meter 8 for detecting the turbidity of the wastewater discharged from the overflow outlet 11, thereby judging the quality of the sedimentation performance.

[0055] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A device for quickly evaluating the flocculation and sedimentation performance of coal slurry water, comprising a sedimentation shell (1), wherein the sedimentation shell (1) is provided with a water inlet pipe (7) for conveying coal slurry water containing flocculant, characterized in that: Also includes: A multi-stage vortex flocculation structure, wherein the multi-stage vortex flocculation structure is sequentially arranged in a sedimentation shell (1) from bottom to top, a gap is provided between two adjacent stages of the vortex flocculation structure, and each stage of the vortex flocculation structure includes a plurality of triangular prism-type flow spoilers (5), each triangular prism-type flow spoiler (5) has two triangular faces, and the two triangular faces are respectively connected to the inner wall of the sedimentation shell (1), and the triangular faces of each triangular prism-type flow spoiler (5) in each stage of the vortex flocculation structure are of the same height, from bottom to top. The heights of the multiple triangular faces in the vortex flocculation structures of each level arranged in sequence increase in sequence, wherein the triangular face height h1 of the triangular prism type flow disruptor (5) in the vortex flocculation structure at the bottom level of the sedimentation shell (1) is calculated by the average particle size d of the coal slime raw material, and the calculation formula is: h1 = (10d-0.046) / 0.0067; the triangular face height h1 of each triangular prism type flow disruptor (5) in the vortex flocculation structure at the top level of the sedimentation shell (1) is n , h n Less than or equal to 15cm, the triangular surface height h of each triangular prism type spoiler (5) in the intermediate vortex flocculation structure x , where x is any natural number between 2 and 6, h x Through h1 and h n Calculated, the calculation formula is: h x =h1+(h n -h1) / (n-1)*(x-1); The multiple triangular prism-shaped spoilers (5) in each stage of the vortex flocculation structure are divided into multiple rows, the vertical central axes of the multiple triangular prism-shaped spoilers (5) in the same row coincide, and the arrangement direction of the multiple triangular prism-shaped spoilers (5) in each row is consistent.

2. A device for rapid evaluation of coal slurry flocculation and sedimentation performance according to claim 1, characterized in that: The three angles of the triangular face of the triangular prism-type spoiler (5) are: a base angle of 25° to 35°, a vertex angle of 15° to 20°, and an obtuse angle of 125° to 140°.

3. A rapid evaluation device for flocculation and sedimentation performance of coal slurry according to claim 2, characterized in that: The three angles of the triangular face of the triangular prism-type spoiler (5) are: a base angle of 30°, a top angle of 15° and an obtuse angle of 135°.

4. A rapid evaluation device for flocculation and sedimentation performance of coal slurry according to claim 1, characterized in that: The center distance between two adjacent triangular prism type flow spoilers (5) in the same row in each stage of the vortex flocculation structure is 0.518 times the height of the triangular prism type flow spoilers (5) located in the stage.

5. A rapid evaluation device for flocculation and sedimentation performance of coal slurry according to claim 1, characterized in that: The vortex flocculation structure comprises three levels of vortex flocculation structures arranged in sequence from bottom to top in a sedimentation shell (1), namely a primary vortex flocculation structure (2), a secondary vortex flocculation structure (3) and a tertiary vortex flocculation structure (4), and the triangular face height of each triangular prism-type flow disruptor (5) in the tertiary vortex flocculation structure is less than or equal to 15 cm.

6. A rapid evaluation device for flocculation and sedimentation performance of coal slurry according to claim 1, characterized in that: The interval height between the upper and lower adjacent vortex flocculation structures is the height of the triangular surface in the lower vortex flocculation structure between the upper and lower adjacent stages.

7. A rapid evaluation device for flocculation and sedimentation performance of coal slurry according to claim 1, characterized in that: The overall height of each level of flocculation structure is H, which is 30 cm to 40 cm. The number of rows of spoilers required for each level is obtained by rounding off the ratio of the vortex zone height to the spoiler height.

8. The device for rapid evaluation of coal slurry flocculation and sedimentation performance according to claim 1, characterized in that: The bottom of the sedimentation shell (1) is provided with a baffle in the longitudinal direction, and the baffle divides the bottom of the sedimentation shell (1) into a flocculation sedimentation area and a coal discharge channel (10). A plurality of triangular prism-type flow disruptors (5) are provided in the flocculation sedimentation area. The top of the coal discharge channel (10) is connected to the top of the vortex flocculation structure at the lowest level, and the bottom of the coal discharge channel (10) is connected to the bottom of the sedimentation shell (1).

9. A device for rapid evaluation of coal slurry flocculation and sedimentation performance according to claim 1, characterized in that: An overflow outlet (11) is provided on the top of the sedimentation shell (1), and a turbidity meter (8) is provided in the overflow outlet (11). The turbidity meter (8) is used to detect the turbidity of the wastewater discharged from the overflow outlet (11).

10. A rapid evaluation device for flocculation and sedimentation performance of coal slurry according to claim 1, characterized in that: A water distribution pipe is provided in the horizontal direction in the sedimentation shell (1) below the minimum-level vortex flocculation structure. The water distribution pipe is connected to the water inlet pipe (7). A plurality of water distribution holes are provided on the water distribution pipe.

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